CN106141947A - A kind of hand-operated tools - Google Patents

Abstract

A kind of hand-operated tools.The invention discloses a kind of labor-saving plier, including first handle, second handle, the first work portion, the second work portion and bindiny mechanism of work portion, the fixing connection of first handle and the first work portion, second handle and the second work portion are pivotably connected, second work portion is connected with the first work portion by bindiny mechanism of work portion, second work portion has primary importance and the second position, when second handle is by when moving near first handle away from first handle, and bindiny mechanism of work portion makes the second work portion be moved to the second position by primary importance.Wherein, primary importance be the second work portion away from location during the first work portion, when the second work portion is in the described second position, compared with primary importance, the second work portion relative to the first work portion there occurs rotation and translation.Compared with existing locking pliers, the labor-saving plier that the present invention provides can provide bigger clamping force, thus plays the effect of further labour-saving.

Description

a hand tool

technical field

The invention relates to a hand tool, in particular to a labor-saving pliers.

Background technique

Ordinary pliers generally include a fixed pliers head, a movable pliers head and a handle. The force acting on the handle is converted into a larger force on the pliers head through the conversion of the lever principle. However, once the force acting on the handle disappears, the jaws will naturally loosen and cannot continue to clamp the workpiece. Because the labor-saving pliers use the principle of leverage twice, the force acting on the handle is transformed through the principle of leverage twice, and finally a clamping force that is several times the applied force can be formed at the jaws, thus achieving the purpose of labor saving.

In the existing forceps, the movable pliers head and the fixed pliers head are pivotally connected by a single fixed shaft. Since the distance between the pivot shaft and the jaws is relatively far, if you want to further achieve the purpose of labor saving, you can use the The pivot axis is arranged closer to the jaws, but the consequence of this is that the opening angle of the jaws will be reduced.

Contents of the invention

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a labor-saving pliers that is more labor-saving and has a larger jaw.

To achieve the above object, the invention provides a hand tool, comprising:

a first handle and a first working part fixedly connected to the first handle;

a second handle and a second working portion pivotably connected to the second handle; the second working portion has a first position and a second position; and

A working part connecting mechanism, the second working part is connected to the first working part through the working part connecting mechanism, and the working part connecting mechanism is configured to: when the second handle is moved away from the first handle When moving close to the first handle, the working part connecting mechanism moves the second working part from the first position to the second position;

Wherein, the first position is the position where the second working part is far away from the first working part. When the second working part is in the second position, compared with the first position , the second working part rotates and translates relative to the first working part.

Further, the connecting mechanism of the working part includes a hole provided on the first working part, a groove provided on the second working part, and a hole passing through the hole on the first working part and the second working part. The shaft of the groove on the part; the shaft can move and rotate in the groove, so that the second working part can rotate and translate relative to the first working part.

Optionally, the working part connection mechanism includes a hole provided on the second working part, a groove provided on the first working part, and a hole passing through the second working part and the first working part. The shaft of the groove on the working part; the shaft can move and rotate in the groove, so that the second working part can rotate and translate relative to the first working part.

Further, the groove is a horizontal groove, an inclined groove or an arc groove.

Preferably, the connecting mechanism of the working part includes:

a first hole provided on the first working part, a first groove provided on the second working part, and a first shaft passing through the first hole and the first groove;

a second hole provided on the second working part, a second groove provided on the first working part, and a second shaft passing through the second hole and the second groove;

The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur.

Optionally, the connecting mechanism of the working part includes:

a first hole provided on the second working part, a first groove provided on the first working part, and a first shaft passing through the first hole and the first groove;

a second hole provided on the first working part, a second groove provided on the second working part, and a second shaft passing through the second hole and the second groove;

The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur.

Further, the fit gap between the first shaft and the first hole and the first slot is smaller than the fit gap between the second shaft and the second hole and the second slot.

Optionally, the fit gap between the first shaft and the first hole and the first slot is equal to the fit gap between the second shaft and the second hole and the second slot.

Optionally, the fit gap between the first shaft and the first hole and the first slot is larger than the fit gap between the second shaft and the second hole and the second slot.

Further, the first groove is an arc groove or a square groove.

Further, the second groove is an arc groove or a square groove.

In a preferred embodiment of the present invention, a hand tool is provided, comprising:

a first handle and a first working part fixedly connected to the first handle;

a second handle and a second working part pivotably connected to the second handle; the second working part has a first position and a second position;

A working part connecting mechanism, the second working part is connected to the first working part through the working part connecting mechanism, and the working part connecting mechanism is configured to: when the second handle is moved away from the first handle When moving close to the first handle, the working part connecting mechanism moves the second working part from the first position to the second position; and

a rod disposed between the second handle and the first handle;

Wherein, the first position is the position where the second working part is far away from the first working part. When the second working part is in the second position, compared with the first position , the second working part rotates and translates relative to the first working part.

Further, the connecting mechanism of the working part includes a hole provided on the first working part, a groove provided on the second working part, and a hole passing through the hole on the first working part and the second working part. The shaft of the groove on the part; the shaft can move and rotate in the groove, so that the second working part can rotate and translate relative to the first working part.

Optionally, the working part connection mechanism includes a hole provided on the second working part, a groove provided on the first working part, and a hole passing through the second working part and the first working part. The shaft of the groove on the working part; the shaft can move and rotate in the groove, so that the second working part can rotate and translate relative to the first working part.

Further, the groove is a horizontal groove, an inclined groove or an arc groove.

Preferably, the connecting mechanism of the working part includes:

a first hole provided on the first working part, a first groove provided on the second working part, and a first shaft passing through the first hole and the first groove;

a second hole provided on the second working part, a second groove provided on the first working part, and a second shaft passing through the second hole and the second groove;

The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur.

Optionally, the connecting mechanism of the working part includes:

a first hole provided on the second working part, a first groove provided on the first working part, and a first shaft passing through the first hole and the first groove;

a second hole provided on the first working part, a second groove provided on the second working part, and a second shaft passing through the second hole and the second groove;

The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur.

Further, the fit gap between the first shaft and the first hole and the first slot is smaller than the fit gap between the second shaft and the second hole and the second slot.

Optionally, the fit gap between the first shaft and the first hole and the first slot is equal to the fit gap between the second shaft and the second hole and the second slot.

Optionally, the fit gap between the first shaft and the first hole and the first slot is larger than the fit gap between the second shaft and the second hole and the second slot.

Further, the first groove is an arc groove or a square groove.

Further, the second groove is an arc groove or a square groove.

Further, the hand tool further includes an elastic member disposed between the second working part and the first handle.

Further, a hanging hole is provided on the second working part, a hook is provided on the first handle, one end of the elastic member is restricted in the hanging hole, and the other end is connected to the hook.

Further, the hand tool further includes an adjusting screw, and the adjusting screw is threadedly connected to the tail of the first handle.

Further, the rod-shaped member has a first end and a second end, the first end of the rod-shaped member is pivotably connected to the second handle, the second end of the rod-shaped member is connected to the A first handle is pivotally connected to and abuts against the adjustment screw.

Further, when the adjusting screw moves relative to the first handle, the adjusting screw moves the second end of the rod-shaped member relative to the first handle.

Further, a groove is provided in the first handle, and the opening of the groove faces the second handle.

Further, a part of the adjusting screw extends in the groove of the first handle, and another part is placed outside the first handle.

Further, a groove is provided in the second handle, and the opening of the groove faces the first handle.

Further, a third handle is pivotably connected to the groove of the second handle.

Further, the length of the third handle is smaller than the length of the second handle.

Further, the third handle has an elongated end, and when the third handle pivots relative to the second handle, the elongated end can abut against the second handle to prevent the third handle from The handle continues to pivot relative to the second handle.

Further, the rod-shaped member has a protruding portion, and when the protruding portion enters the groove of the second handle, the manual tool is locked; turning the third handle toward the direction of the second handle, The elongated end is capable of pushing the protrusion out of the slot of the second handle, unlocking the hand tool.

Further, the part where the third handle is connected to the second handle is separated from the part where the rod-shaped member is connected to the second handle, and is smaller than the part where the rod-shaped member is connected to the second handle. The location is farther away from the second working department.

Further, the part where the rod-shaped member is connected to the second handle is separated from the part where the second working part is connected to the second handle.

In another preferred embodiment of the present invention, a hand tool is provided, comprising:

a first handle and a first working part fixedly connected to the first handle;

a second handle and a second working part pivotably connected to the second handle; the second working part has a first position and a second position;

A working part connecting mechanism, the second working part is connected to the first working part through the working part connecting mechanism, and the working part connecting mechanism is configured to: when the second handle is moved away from the first handle When moving close to the first handle, the working part connecting mechanism moves the second working part from the first position to the second position;

a rod disposed between the second handle and the first handle; and

a limiting mechanism, the limiting mechanism is used to limit the displacement of the rod-shaped member relative to the second handle;

Wherein, the first position is the position where the second working part is far away from the first working part. When the second working part is in the second position, compared with the first position , the second working part rotates and translates relative to the first working part.

Further, the connecting mechanism of the working part includes a hole provided on the first working part, a groove provided on the second working part, and a hole passing through the hole on the first working part and the second working part. The shaft of the groove on the part; the shaft can move and rotate in the groove, so that the second working part can rotate and translate relative to the first working part.

Optionally, the working part connection mechanism includes a hole provided on the second working part, a groove provided on the first working part, and a hole passing through the second working part and the first working part. The shaft of the groove on the working part; the shaft can move and rotate in the groove, so that the second working part can rotate and translate relative to the first working part.

Further, the groove is a horizontal groove, an inclined groove or an arc groove.

Preferably, the connecting mechanism of the working part includes:

a first hole provided on the first working part, a first groove provided on the second working part, and a first shaft passing through the first hole and the first groove;

a second hole provided on the second working part, a second groove provided on the first working part, and a second shaft passing through the second hole and the second groove;

The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur.

Optionally, the connecting mechanism of the working part includes:

a first hole provided on the second working part, a first groove provided on the first working part, and a first shaft passing through the first hole and the first groove;

a second hole provided on the first working part, a second groove provided on the second working part, and a second shaft passing through the second hole and the second groove;

The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur.

Further, the fit gap between the first shaft and the first hole and the first slot is smaller than the fit gap between the second shaft and the second hole and the second slot.

Optionally, the fit gap between the first shaft and the first hole and the first slot is equal to the fit gap between the second shaft and the second hole and the second slot.

Optionally, the fit gap between the first shaft and the first hole and the first slot is larger than the fit gap between the second shaft and the second hole and the second slot.

Further, the first groove is an arc groove or a square groove.

Further, the second groove is an arc groove or a square groove.

Further, the limiting mechanism includes a waist-shaped hole arranged on the second working part and a limiting shaft arranged in the waist-shaped hole, and the rod-shaped member connects with the second handle through the limiting shaft. Pivotably connected, the limiting shaft cooperates with the waist-shaped hole to form the limiting mechanism.

Further, when the limiting shaft is facing the first handle in the waist-shaped hole, the first working part and the second working part are in a loose state; when the limiting shaft is in the When the waist-shaped hole is away from the first handle, the first working part and the second working part are in a clamping state.

Further, a groove is provided in the second handle, and the opening of the groove faces the first handle.

Further, a third handle is provided in the groove of the second handle, the third handle is connected to the second handle, and the third handle is connected to the rod-shaped member through the limiting shaft.

Further, the part where the third handle is connected to the second handle is separated from the part where the second handle is connected to the second working part, and the part where the third handle is connected to the second handle The part is separated from the part where the third handle is connected to the rod.

Further, the length of the second handle is greater than the length of the third handle.

Further, during the rotation of the second handle, the connecting point of the rod-shaped member and the third handle will cross the connection point between the third handle and the second handle and the second handle. When the second handle moves closer to the first handle and crosses the line, the first working part and the second working part are connected Clamping; when the second handle is away from the first handle and crosses the connecting line, the first working part and the second working part are released.

Further, the hand tool further includes an elastic member disposed between the second working part and the first handle.

Further, a hanging hole is provided on the second working part, a hook is provided on the first handle, one end of the elastic member is restricted in the hanging hole, and the other end is connected to the hook.

Further, the hand tool further includes an adjusting screw, and the adjusting screw is threadedly connected to the tail of the first handle.

Further, the rod-shaped member has a first end and a second end, the first end of the rod-shaped member is pivotably connected to the second handle, the second end of the rod-shaped member is connected to the A first handle is pivotally connected to and abuts against the adjustment screw.

Further, when the adjusting screw moves relative to the first handle, the adjusting screw moves the second end of the rod-shaped member relative to the first handle.

Further, a groove is provided in the first handle, and the opening of the groove faces the second handle.

Further, a part of the adjusting screw extends in the groove of the first handle, and another part is placed outside the first handle.

In yet another preferred embodiment of the present invention, a hand tool is provided, comprising:

a first handle and a first working part fixedly connected to the first handle;

a second handle and a second working part pivotably connected to the second handle; the second working part has a first position and a second position;

A working part connecting mechanism, the second working part is connected to the first working part through the working part connecting mechanism, and the working part connecting mechanism is configured to: when the second handle is moved away from the first handle When moving close to the first handle, the working part connecting mechanism moves the second working part from the first position to the second position;

a sliding mechanism slidably mounted on the first handle;

a rod-shaped member, one end of which is pivotally connected to the second handle, and the other end is pivotally mounted on the sliding mechanism;

Wherein, the first position is the position where the second working part is far away from the first working part. When the second working part is in the second position, compared with the first position , the second working part rotates and translates relative to the first working part.

Further, the connecting mechanism of the working part includes a hole provided on the first working part, a groove provided on the second working part, and a hole passing through the hole on the first working part and the second working part. The shaft of the groove on the part; the shaft can move and rotate in the groove, so that the second working part can rotate and translate relative to the first working part.

Optionally, the working part connection mechanism includes a hole provided on the second working part, a groove provided on the first working part, and a hole passing through the second working part and the first working part. The shaft of the groove on the working part; the shaft can move and rotate in the groove, so that the second working part can rotate and translate relative to the first working part.

Further, the groove is a horizontal groove, an inclined groove or an arc groove.

Preferably, the connecting mechanism of the working part includes:

a first hole provided on the first working part, a first groove provided on the second working part, and a first shaft passing through the first hole and the first groove;

a second hole provided on the second working part, a second groove provided on the first working part, and a second shaft passing through the second hole and the second groove;

The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur.

Optionally, the connecting mechanism of the working part includes:

a first hole provided on the second working part, a first groove provided on the first working part, and a first shaft passing through the first hole and the first groove;

a second hole provided on the first working part, a second groove provided on the second working part, and a second shaft passing through the second hole and the second groove;

The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur.

Further, the fit gap between the first shaft and the first hole and the first slot is smaller than the fit gap between the second shaft and the second hole and the second slot.

Optionally, the fit gap between the first shaft and the first hole and the first slot is equal to the fit gap between the second shaft and the second hole and the second slot.

Optionally, the fit gap between the first shaft and the first hole and the first slot is larger than the fit gap between the second shaft and the second hole and the second slot.

Further, the first groove is an arc groove or a square groove.

Further, the second groove is an arc groove or a square groove.

Further, one end of the rod-shaped member connected to the sliding mechanism is composed of a curved section, and the curvature of the curved section close to the first handle is larger than that of the curved section far away from the first handle.

Further, the manual tool further includes a locking mechanism, the locking mechanism is slidably attached to the first handle, and is located on the distal side of the sliding mechanism close to the first handle.

Further, the locking mechanism includes a guide rod and a lock piece, the guide rod is installed on the first handle and passes through the lock piece.

Further, the locking pieces are multiple pieces, and the multiple locking pieces are attached to each other.

Further, the cross-section of the guide rod is a trapezoid with rounded corners, and there is a hole in the middle of the lock plate for the guide rod to pass through, and the hole is set to have the same circular shape as the cross-sectional shape of the guide rod. Angular trapezoidal shape, the guide rod and the locking piece are clearance fit.

Further, the adjustment mechanism is installed on the guide rod, located between the sliding mechanism and the locking mechanism, and the adjustment mechanism is configured to be capable of displacement in the length direction of the guide rod.

Further, the adjustment mechanism is configured such that when the adjustment mechanism reaches a maximum displacement towards either end of the guide rod, when the manual tool is locked, the rod-shaped member connected to the sliding mechanism One end can be in contact with the adjustment mechanism.

Further, the adjustment mechanism includes an adjustment screw and a carrier, the carrier is installed on the guide rod, the adjustment screw is installed on the carrier, and can generate relative to the carrier along the direction of the guide rod. displacement.

Further, the cross-section of the carrier is the same as that of the locking piece, and has a hole with the same shape and size as the locking piece at the same position as the locking piece, and the guide rod passes through the carrier on the hole.

Further, a groove is provided in the second handle, the opening of the groove faces the first handle, and a third handle is pivotably connected to the groove of the second handle.

Further, the third handle has an elongated end, and when the third handle pivots relative to the second handle, the elongated end can abut against the second handle to prevent the third handle from The handle continues to pivot relative to the second handle.

Further, the rod-shaped member has a protruding portion, and when the protruding portion enters the second handle, the hand tool is locked; when the third handle is rotated toward the second handle, the The elongated end can push the protrusion out of the slot of the second handle, so that the hand tool is unlocked.

The manual tool provided by the present invention can be labor-saving pliers, water pump pliers, etc., wherein, the first working part and the second working part are connected through the working part connecting mechanism, no matter the setting of the working part connecting mechanism adopts single shaft or double shaft, the second working part The center of rotation of the first working part relative to the first working part is closer to the jaws than the existing pliers, so it can save more labor than the existing pliers. In addition, since the shaft is arranged in the groove, that is, when the second working part moves relative to the first working part, the shaft moves and rotates in the groove, or the groove moves relative to the shaft, thereby ensuring that a larger jaw can be obtained . On the other hand, when the object is clamped, since the shaft can move relative to the groove, the second working part will not only rotate relative to the first working part, but also translate, so that the second working part and the first working part The contact area between the head and the clamped object (ie, the grasping area) increases, making the grasping of the object more effective.

The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

Description of drawings

Fig. 1 is a schematic diagram of a hand tool according to a preferred embodiment of the present invention, showing the shape of the horizontal groove when the first working part and the second working part are connected by a single shaft;

Fig. 2 is a schematic diagram of a hand tool according to a preferred embodiment of the present invention, showing the shape of the chute when the first working part and the second working part are connected by a single shaft;

Fig. 3 is a schematic diagram of a hand tool according to a preferred embodiment of the present invention, showing the shape of the arc groove when the first working part and the second working part are connected by a single shaft;

Fig. 4 is a schematic diagram of a hand tool according to a preferred embodiment of the present invention, which shows the shape of the arc groove when the first working part and the second working part are connected by two shafts

Fig. 5 is a schematic diagram of the labor-saving pliers in a specific embodiment of the present invention, in which the jaws are in a closed state;

Fig. 6 is a schematic diagram of the labor-saving pliers in a specific embodiment of the present invention, in which the jaws are in an open state;

Fig. 7 is a schematic diagram of the labor-saving pliers in a specific embodiment of the present invention, in which the jaws are in the state of clamping objects;

Fig. 8 is a schematic diagram of preventing the handle from opening too large water pump pliers in a specific embodiment of the present invention;

Fig. 9 is a schematic diagram of self-adjusting water pump pliers in a specific embodiment of the present invention.

detailed description

As shown in Figures 1-4, a preferred embodiment of the present invention provides a hand tool, including a first handle 2, a first working part 1, a second handle 4, a second working part 3 and a working part connection mechanism . Wherein, the first handle 2 and the second handle 4 are fixedly connected, and in an alternative embodiment, the first handle 2 and the second handle 4 may be integrated. The second handle 4 is pivotably connected with the second working part 3, and the second working part 3 has a first position and a second position. Here the first position of the second working part 3 refers to the position where the second working part 3 is away from the first working part 1. When the second working part 3 is in the second position, compared with the first position, the second working part 3 The second working part 3 rotates and translates relative to the first working part 1 . In the embodiment of the present invention, the first working part 1 and the second working part 3 cooperate to form a jaw for clamping an object or a shearing opening for shearing an object, whether to form a jaw or a shearing opening depends on the first working part 1 The shape of the matching part with the second working part 3.

The second working part 3 is connected to the first working part 1 through the working part connecting mechanism 100. The working part connecting mechanism 100 is configured such that when the second handle 4 moves away from the first handle 2 to approach the first handle 2, the working part The connection mechanism 100 moves the second working part 3 from the first position to the second position.

Specifically, as shown in FIGS. 1-3 , the working part connecting mechanism 100 includes a hole provided on the first working part 1 , a groove 6 provided on the second working part 3 and a hole penetrating through the first working part 1 And the shaft 5 of the groove 6 on the second working part 3; the shaft 5 can move and rotate in the groove 6, so that the second working part 3 can rotate and translate relative to the first working part 1. But not limited thereto, in an alternative embodiment, the hole is set on the second working part 3, the groove 6 is set on the first working part 1, and the shaft 5 passes through the hole on the second working part 3 and the first working part. The slot 6 on the part 1; the shaft 5 can move and rotate in the slot 6, so that the second working part 3 can rotate and translate relative to the first working part 1.

In order to prevent misalignment when the first working part 1 and the second working part 3 cooperate, the groove 6 provided on the first working part 1 or the second working part 3 can be designed as a horizontal groove, an inclined groove or an arc groove. In this way, when an external force is applied to the first handle 2 and the second handle 4 to make the second handle 4 rotate relative to the first handle 2, the second working part 3 rotates around the axis 5, and at the same time, because the groove 6 is moving relative to the axis 5, It is equivalent to that the shaft 5 moves relative to the groove 6 along the shape of the groove 6 in the groove 6 , so that the second working part 3 also translates relative to the first working part 1 . The advantage of the translation of the second working part 3 relative to the first working part 1 is that when the hand tool is used to clamp an object, the first working part 1 and the second working part 3 can be automatically adjusted according to the shape and thickness of the object to be clamped. and the angle of the clamped object to achieve the best contact mode. If the first working part 1 and the second working part 3, the object to be clamped can only be clamped in a scissors-like manner. In addition, the contact area between the first working part 1 and the second working part 3 and the object to be clamped can also be increased, that is, the grasping area is increased, so that the grasping of the object is more reliable and effective. Here, the definition of the horizontal groove is: when the jaws or cutouts formed by the first working part 1 and the second working part 3 are closed, the distance from the closing point of the first working part 1 and the second working part 3 to the shaft 5 The groove on the vertical line of the connecting line of the clamping axis is a horizontal groove, that is, the slotting direction of the groove 6 is at the connection point from the closing point of the first working part 1 and the second working part 3 to the clamping axis of the shaft 5. on the vertical line of the line. If the slotting direction of the groove 6 or the groove 6 is not on the vertical line from the closing point of the first working part 1 and the second working part 3 to the clamping axis of the shaft 5 (that is, the groove 6 is not connected to the connecting line) Vertical) is a chute. The circular arc groove is a special case of the chute. The circular arc groove makes the movement track of the shaft 5 in the groove 6 relative to the groove 6 be a circular arc.

As another preferred embodiment, as shown in FIG. 4 , the working part connection mechanism 100 includes: a first hole provided on the first working part 1 , a first groove 8 provided on the second working part 3 and a through The first shaft 7 of the first hole and the first groove 8; the second hole arranged on the second working part 3, the second groove 10 arranged on the first working part 1 and the second hole and the second groove 10 The second axis 9. But not limited thereto, in an alternative embodiment, the first hole is set on the second working part 3, the first groove 8 is set on the first working part 1, and at this time the first shaft 9 runs through the second working part 3 and the first groove 8 on the first working part 1; the second hole is set on the first working part 1, the second groove 10 is set on the second working part 3, and the second shaft 9 runs through the first A second hole on the working part 1 and a second groove 10 on the second working part 3 . The first shaft 7 can move and rotate in the first groove 8 (or the first groove 8 can move and rotate relative to the first shaft 7), and the second shaft 9 can move and rotate in the second groove 10, so that The second working part 3 can rotate and translate relative to the first working part 1 . The first shaft 7 is closer to the clamping or shearing area formed by the first working part 1 and the second working part 3 than the second shaft 9 . Wherein, the first groove 7 may be an arc groove or a square groove, and the second groove 9 may be an arc groove or a square groove.

In a preferred embodiment of the present invention, the fitting gap between the first shaft 7 and the first hole and the first slot 8 is generally set to be smaller than the fitting gap between the second shaft 9 and the second hole and the second slot 10 . In this way, when the first handle 2 and the second handle 4 are subjected to an external force to make the first working part 1 and the second working part 3 clamp or shear the object, due to the fit gap between the first shaft 7 and the first hole and the first groove 8 Smaller, compared with the second shaft 9, the first shaft 7 is first subjected to the force exerted by the first groove 8 on it, until the first shaft 7 cannot continue to move relative to the first groove 8 under the force, or in other words When the first slot 8 cannot continue to move relative to the first shaft 7 , the second shaft 9 begins to receive the force exerted by the second slot 10 on it. Therefore, in this case, the first shaft 7 plays the role of main force bearing, while the second shaft 9 plays the role of assisting the first shaft 7 to bear the external force.

In other embodiments of the present invention, the fitting gap between the first shaft 7 and the first hole and the first slot 8 is set to be equal to the fitting gap between the second shaft 9 and the second hole and the second slot 10 . In this case, when the first handle 2 and the second handle 4 are subjected to an external force to make the first working part 1 and the second working part 3 clamp or shear the object, due to the first shaft 7 and the first hole and the first groove The fit gap of 8 is equal to the fit gap between the second shaft 9 and the second hole and the second groove 10. When the first shaft 7 is subjected to the force of the first groove 8, the second shaft 9 is also subjected to the force of the second groove 10. , that is, the first axis 7 and the second axis 9 share the external force equally.

In other embodiments of the present invention, if the fit gap between the first shaft 7 and the first hole and the first slot 8 is set to be greater than the fit gap between the second shaft 9 and the second hole and the second slot 10, the second The shaft 9 plays the role of the main force, and the first shaft 7 assists the second shaft 9 to bear the external force.

In this embodiment, the purpose of setting two shafts (the first shaft 7 and the second shaft 9) is to let the two shafts jointly bear the effect of external force (whether one of the shafts mainly bears the force and the other auxiliary bears the force, or The two shafts share the force equally), compared with the case where only one shaft is provided, the loss of the shaft and the deformation of the hand tool caused by it can be reduced. On the other hand, the effect of setting two shafts is also to limit the size of the jaws or shearing openings formed by the rotation of the second working part 3 around the first shaft 7 relative to the first working part 1 through the second shaft 9, so as to prevent the pincers from If the mouth or cutout is too large to affect the actual use, make the jaw or cutout in an appropriate size. At the same time, it also limits the opening distance of the first handle 2 and the second handle 4 from being too large, so that the user can easily realize one-handed operation.

Fig. 5-7 has shown a specific embodiment of the present invention, and this embodiment provides a kind of hand tool, exactly, is a kind of labor-saving pliers, comprises first handle 13, second handle 14, first working part 11. The second working part 12 , the connecting mechanism 200 of the working part, the rod-shaped part 21 , the elastic part 22 , the third handle (not shown) and the adjusting screw 25 . Wherein, the first handle 13 and the first working part 11 are fixedly connected, and the two can also be integrally formed. The second handle 14 is pivotally connected to the second working part 12 . In this embodiment, the working part connection mechanism adopts the biaxial arrangement as mentioned above, that is, it includes the first hole set on the first working part 11, the first groove 18 set on the second working part 12 and the through hole. The first shaft 17 of the first hole and the first groove 18; the second hole arranged on the second working part 12, the second groove 20 arranged on the first working part and the second hole and the second groove 20 passing through Second axis 19. The first shaft 17 is closer to the jaw formed by the first working part 11 and the second working part 12 than the second shaft 19 . The first shaft 17 can move and rotate in the first groove 18 , and the second shaft 19 can move and rotate in the second groove 20 , so that the second working part 12 can rotate and translate relative to the first working part 11 . Wherein the first groove 18 and the second groove 20 are arc grooves, and may also be square grooves. As an alternative embodiment, the working part connecting mechanism 200 can also adopt the aforementioned single-axis setting (not shown here), that is, the working part connecting mechanism 200 includes a hole arranged on the first working part 11, The slot provided on the second working part 12 and the shaft passing through the hole on the first working part and the slot on the second working part 12 . If it is single-axis setting, the groove can be horizontal groove, inclined groove or arc groove.

In this embodiment, the second working part 12 has a first position and a second position. The second working part 12 is connected to the first working part 11 through the working part connecting mechanism 200 . When the second handle 14 moves from away from the first handle 13 to close to the first handle 13 , the working part connecting mechanism 200 moves the second working part 12 from the first position to the second position. Here, the first position of the second working part 12 refers to the position where the second working part 12 is away from the first working part 11. When the second working part 12 is in the second position, compared with the first position , the second working part 12 rotates and translates relative to the first working part 11 .

In this embodiment, the fit gap between the first shaft 17 and the first hole and the first slot 18 is smaller than the fit gap between the second shaft 19 and the second hole and the second slot 20 . In an alternative embodiment of this embodiment, the fit gap between the first shaft 17 and the first hole and the first slot 18 can also be set to be equal to or greater than the fit between the second shaft 19 and the second hole and the second slot 20 gap. As mentioned above, one function of setting two shafts is to share the external force through the two shafts, thereby reducing the wear of the shafts and the deformation of the labor-saving tongs, and the other function is to limit the size of the jaws through the second shaft 19, and at the same time It also limits the opening distance of the first handle 13 and the second handle 14 from being too large, so that the user can easily realize one-handed operation

In the labor-saving pliers of this embodiment, the first handle 13 is provided with a groove extending along the length direction of the first handle 13, the opening of the groove faces the second handle 14, and the second handle 14 is provided with a groove extending along the second handle 14. A groove extending in the length direction of the groove, the opening of the groove faces the first handle 13 . A first end of a rod-shaped member 21 is disposed in the groove of the second handle 14 , and the first end of the rod-shaped member 21 is pivotably connected to the second handle 14 . The groove of the first handle 13 is provided with the second end of the rod-shaped part 21 and the adjusting screw rod 25, the second end of the rod-shaped part 21 is in contact with the first end of the adjusting screw rod 25, and the adjusting screw rod 25 is in the first handle 13. Extend along the length direction of the first handle 13 in the groove and make the second end of the adjusting screw 25 pass through the annular hole that is arranged on the afterbody (that is, the end away from the jaw) of the first handle 13 until the second end of the adjusting screw 25 The end is located on the outside of the first handle 13. The annular hole is provided with an internal thread matched with the thread on the adjusting screw 25, and the diameter of the annular hole is smaller than the diameter of the second end of the adjusting screw 25, so that the second end of the adjusting screw 25 cannot enter the first handle 13 through the annular hole.

Rotating the adjusting screw 25 can change the position of the first end of the adjusting screw 25 in the groove of the first handle 13, thereby adjusting the size of the jaws formed by the first working part 11 and the second working part 12, so as to adapt to different sizes of jaws. Trapped object 26. Specifically, when rotating the adjusting screw 25 to make the second end of the adjusting screw 25 move away from the direction of the jaws, the second end of the rod 21 moves away from the jaws along with the movement of the first end of the adjusting screw 25, and the rod The first end of the shape member 21 pulls the second handle 14 by its connecting point 28 with the second handle 14, and then the second handle 14 pulls the second working part 12 by its connecting point 27 with the second working part 12, due to the second The two working parts 12 are restricted by the first shaft 17 and the second shaft 19 at the same time, so the second working part 12 pivots around the first shaft 17 and the second shaft 19 away from the first working part 11 , so that the jaws expand. When turning the adjusting screw 25 to make the second end of the adjusting screw 25 move close to the direction of the jaws, the second end of the rod 21 moves closer to the jaws as the first end of the adjusting screw 25 moves, and the rod 21 moves closer to the jaws. The first end pushes the second handle 14 through its connecting point 28 with the second handle 14, and then the second handle 14 pushes the second working part 12 through its connecting point 27 with the second working part 12, because the second working part 12 At the same time, it is restricted by the first shaft 17 and the second shaft 19 , so the second working part 12 pivots around the first shaft 17 and the second shaft 19 close to the first working part 11 , so that the jaws are reduced.

In the labor-saving pliers of this embodiment, the elastic member 22 is arranged between the second working part 12 and the first handle 13, specifically, the second working part 12 is provided with a hanging hole 24, and the groove of the first handle 13 A hook portion 23 is provided, and one end of the elastic member 22 is restricted in the hanging hole 24 , and the other end is connected to the hook portion 23 . The elastic member 22 in this embodiment is a spring, specifically a tension spring.

In the labor-saving pliers of this embodiment, a third handle is pivotally connected in the groove of the second handle 14 . The length of the third handle is smaller than the length of the second handle 14 . The third handle has an elongated end that can abut against the second handle 14 when the third handle is pivoted relative to the second handle 14 to prevent the third handle from continuing to pivot relative to the second handle 14 . In addition, the rod-like member 21 has a protruding portion 211, and when the protruding portion 211 enters the groove of the second handle 14, the hand tool is locked; the third handle is rotated toward the direction of the second handle 14, and the elongated end of the third handle The protruding portion 211 of the rod-shaped member 21 can be pushed out from the groove of the second handle 14 to unlock the labor-saving pliers.

In the labor-saving pliers of this embodiment, the part where the third handle is connected to the second handle 14 is separated from the part 28 where the rod-shaped member 21 is connected to the second handle 14, and is smaller than the part where the rod-shaped member 21 is connected to the second handle 14. 28 is further away from the second working part 12 . The part 28 where the rod-like member 21 is connected to the second handle is separated from the part 27 where the second working part 12 is connected to the second handle 14 .

In the labor-saving pliers of this embodiment, when the second working part 12 moves away from or approaches the first working part 11, the first groove 18 moves away from or approaches the first working part 11 and rotates relative to the first shaft 17, and at the same time the second shaft 19 Moving and rotating close to or away from the first working part 11 in the second slot 20 is actually equivalent to the rotation of the second working part 12 away from or close to the first working part 11 around the virtual axis. The virtual axis here is imaginary due to the first axis 17 and the second axis 19, the virtual axis is located between the first axis 17 and the second axis 19, and because the first axis 17 is relative to the first groove 18 and the second axis 19 are moving relative to the second groove 20, so the virtual axis is also moving. But no matter how the virtual axis moves, compared with the second axis 19 (generally the position of the connecting shaft between the movable jaw and the fixed jaw in the existing forceps), the virtual axis is closer to the jaws, so as to Compared with the existing forceps, the distance between the virtual axis center and the jaws becomes smaller. If the input torque at the contact point of the first working part 11 and the clamped object is constant, that is, the torque of the corresponding jaw is constant, because the distance between the virtual axis and the jaw is smaller than that of the existing forceps, thus The clamping force generated by the jaws is greater, which achieves a labor-saving effect.

Fig. 8 has shown another specific embodiment of the present invention, and this embodiment provides a kind of hand tool, exactly a kind of water pump pliers that prevents handle from being opened too much, comprises first handle 33, second handle 34, The first working part 31 , the second working part 32 , the working part connection mechanism 300 , the rod-shaped part 41 , the limiting mechanism, the elastic part 42 and the adjusting screw 45 . Wherein, the first handle 33 and the first working part 31 are fixedly connected, and the two can also be integrally formed. The second handle 34 is pivotally connected with the second working part 32 . In this embodiment, the working part connection mechanism 300 adopts the biaxial arrangement as mentioned above, that is, it includes the first hole provided on the first working part 31, the first slot 38 provided on the second working part 32 and The first shaft 37 that runs through the first hole and the first groove 38; the second hole that is arranged on the second working part 32, the second groove 40 that is arranged on the first working part 31, and the second hole that runs through the second groove and the second groove 40 of the second axis 39 . The first shaft 37 is closer to the jaw formed by the first working part 31 and the second working part 32 than the second shaft 39 . The first shaft 37 can move and rotate in the first groove 38 , and the second shaft 39 can move and rotate in the second groove 40 , so that the second working part 32 can rotate and translate relative to the first working part 31 . Wherein the first groove 37 and the second groove 39 are arc grooves, and may also be square grooves. As an alternative embodiment, the working part connecting mechanism 300 can also adopt the aforementioned single-axis setting (not shown here), that is, the working part connecting mechanism 300 includes a hole arranged on the first working part 31, The groove provided on the second working part 32 and the shaft passing through the hole on the first working part 31 and the groove on the second working part 32 . If it is single-axis setting, the groove can be horizontal groove, inclined groove or arc groove.

In this embodiment, the second working part 32 has a first position and a second position. The second working part 32 is connected to the first working part 31 through the working part connection mechanism 300 . When the second handle 34 moves from away from the first handle 33 to close to the first handle 33 , the working part connecting mechanism 300 moves the second working part 32 from the first position to the second position. Here, the first position of the second working part 32 refers to the position where the second working part 32 is away from the first working part 31. When the second working part 32 is in the second position, compared with the first position , the second working part 32 rotates and translates relative to the first working part 31 .

In this embodiment, the fit gap between the first shaft 37 and the first hole and the first slot 38 is smaller than the fit gap between the second shaft 39 and the second hole and the second slot 40 . In an alternative embodiment of this embodiment, the matching gap between the first shaft 37 and the first hole and the first slot 38 can also be set to be equal to or greater than the matching gap between the second shaft 39 and the second hole and the second slot 40 gap. As mentioned above, one function of setting two shafts is to share the external force through the two shafts, thereby reducing the wear of the shafts and the deformation of the labor-saving tongs, and the other function is to limit the size of the jaws through the second shaft 39, and at the same time It also restricts the first handle 33 and the second handle 34 from being too large, so that the user can easily realize one-handed operation.

In the water pump pliers of this embodiment, the first handle 33 is provided with a groove extending along the length direction of the first handle 33, the opening of the groove faces the second handle 34, and the second handle 34 is provided with a groove extending along the second handle 34. A groove extending in the length direction of the groove, the opening of the groove faces the first handle 33 . A first end of a rod-shaped member 41 is disposed in the groove of the second handle 34 , and the first end of the rod-shaped member 41 is pivotally connected to the second handle 34 . The second end of the rod-shaped member 41 and the adjusting screw 45 are arranged in the groove of the first handle 33 , and the second end of the rod-shaped member 41 is in contact with the adjusting screw 45 . The adjusting screw rod 45 is threadedly connected with the tail of the first handle 33 . A part of the adjusting screw 45 extends in the groove of the first handle 33 , and the other part is placed outside the first handle 33 . When the adjustment screw 45 moves relative to the first handle 33 , the adjustment screw 45 moves the second end of the rod 41 relative to the first handle 33 .

In the water pump pliers of this embodiment, the limiting mechanism is used to limit the displacement of the rod-shaped member relative to the second handle. The limiting mechanism includes a waist-shaped hole 491 arranged on the second working part and a limiting shaft 49 arranged in the waist-shaped hole 491. The rod-like member 41 is pivotally connected with the second handle 34 through the limiting shaft 49, and the limiting shaft 49 Cooperate with the waist hole 491 to form a limiting mechanism. When the limiting shaft 49 is facing the first handle 33 in the waist-shaped hole 491, the first working part 31 and the second working part 32 are in a loose state; , the first working part 31 and the second working part 32 are in a clamping state.

A third handle 50 is also disposed in the groove of the second handle 34 , the third handle 50 is connected to the second handle 34 , and the third handle 50 is connected to the first end of the rod-shaped member 41 through the limiting shaft 49 . The part 48 where the third handle 50 is connected to the second handle 34 and the part 47 where the second handle 34 is connected to the second working part 32 are separated, and the part 48 where the third handle 50 is connected to the second handle 34 and the third handle 50 The part connected with the rod-shaped member 41 is separated. The length of the second handle 34 is greater than the length of the third handle 50 .

During the rotation of the second handle 34, the connecting point of the rod 41 and the third handle 50 will cross the connection between the connection point 48 of the third handle 50 and the second handle 34 and the connection between the second handle 34 and the second working part 32 The line formed by point 47, when the second handle 34 moves closer to the first handle 33 and crosses the line, the first working part 31 and the second working part 32 are clamped; when the second handle 34 is far away from the first handle 33 And when crossing the connecting line, the first working part 31 and the second working part 32 are released.

In the water pump pliers of this embodiment, the elastic member 42 is disposed between the second working part 32 and the first handle 33 . Specifically, the second working part 32 is provided with a hanging hole 44, and the first handle 33 is provided with a hook 43. One end of the elastic member 42 is limited in the hanging hole 44, and the other end is connected with the hook on the first handle 33. 43 connections. The elastic member 42 is a spring, specifically a tension spring.

Fig. 9 shows another embodiment of the present invention, which provides a hand tool, specifically a self-adjusting water pump pliers, including a first handle 53, a second handle 54, a first working part 51 , the second working part 52, the working part connecting mechanism 400, the rod-shaped part 61, the sliding mechanism 64, the locking mechanism and the adjusting mechanism. Wherein, the first handle 53 and the first working part 51 are fixedly connected, and the two can also be integrally formed. The second handle 54 is pivotally connected with the second working part 52 .

In this embodiment, the working part connection mechanism 400 adopts the biaxial arrangement as mentioned above, that is, it includes the first hole provided on the first working part 51, the first slot 58 provided on the second working part 52 and The first shaft 57 that runs through the first hole and the first groove 58; the second hole that is arranged on the second working part 52, the second groove 60 that is arranged on the first working part 51, and the second hole that passes through the second groove and the second groove 60 of the second axis 59 . The first shaft 57 is closer to the jaw formed by the first working part 51 and the second working part 52 than the second shaft 59 . The first shaft 57 can move and rotate in the first groove 58 , and the second shaft 59 can move and rotate in the second groove 60 , so that the second working part 52 can rotate and translate relative to the first working part 51 . Wherein the first groove 58 and the second groove 60 are arc grooves, and may also be square grooves. As an alternative embodiment, the working part connecting mechanism 400 can also adopt the aforementioned single-axis setting (not shown here), that is, the working part connecting mechanism 400 includes a hole arranged on the first working part 51, The groove provided on the second working part 52 and the shaft passing through the hole on the first working part 51 and the groove on the second working part 52 . If it is single-axis setting, the groove can be horizontal groove, inclined groove or arc groove.

In this embodiment, the second working part 52 has a first position and a second position. The second working part 52 is connected to the first working part 51 through the working part connection mechanism 400 . When the second handle 54 moves from away from the first handle 53 to close to the first handle 53 , the working part connecting mechanism 400 moves the second working part 52 from the first position to the second position. Here, the first position of the second working part 52 refers to the position where the second working part 52 is away from the first working part 51. When the second working part 2 is in the second position, compared with the first position , the second working part 52 rotates and translates relative to the first working part 51 .

In this embodiment, the fit gap between the first shaft 57 and the first hole and the first slot 58 is smaller than the fit gap between the second shaft 59 and the second hole and the second slot 60 . In an alternative embodiment of this embodiment, the fit gap between the first shaft 57 and the first hole and the first slot 58 can also be set to be equal to or greater than the fit between the second shaft 59 and the second hole and the second slot 60 gap. As mentioned above, one function of setting two shafts is to share the external force through the two shafts, thereby reducing the wear of the shafts and the deformation of the labor-saving tongs, and the other function is to limit the size of the jaws through the second shaft 59 .

In this embodiment, the sliding mechanism 64 is slidably mounted on the first handle 53 , one end of the rod 61 is pivotably connected to the second handle, and the other end is pivotally mounted on the sliding mechanism. One end of the rod-like member 61 connected to the sliding mechanism 64 is composed of a curved section, and the curvature of the curved section close to the first handle 53 is greater than that of the curved section far away from the first handle 53 .

The locking mechanism is slidably attached to the first handle 53 and is located on the distal side of the sliding mechanism 64 close to the first handle 53 . The far end here refers to the end away from the jaws. The locking mechanism includes a guide rod 67 and a lock piece 68 , the guide rod 67 is installed on the first handle 53 and passes through the lock piece 68 . The locking pieces 68 are multi-pieces, and the multi-piece locking pieces 68 are attached to each other. The cross-section of the guide rod 67 is a trapezoid with rounded corners, and there is a hole in the middle of the lock plate 68 for the guide rod 67 to pass through. The locking piece 68 is a clearance fit.

In this embodiment, the adjustment mechanism is installed on the guide rod 67 and located between the sliding mechanism and the locking mechanism, and the adjustment mechanism is configured to be capable of displacement along the length direction of the guide rod 67 . When the adjustment mechanism reaches the maximum displacement toward any end of the guide rod 67, when the water pump pliers of this embodiment is locked, the end of the rod-shaped member 61 connected to the sliding mechanism can be in contact with the adjustment mechanism.

Specifically, the adjustment mechanism includes an adjustment screw 66 and a carrier 65 , the carrier 65 is mounted on the guide rod 67 , and the adjustment screw 66 is mounted on the carrier 65 and can be displaced relative to the carrier 65 along the direction of the guide rod 67 . The cross section of the carrier 65 is the same as that of the lock piece 68 , and has a hole with the same shape and size as the lock piece 68 at the same position as the lock piece 68 , and the guide rod 67 passes through the hole on the carrier 65 .

In this embodiment, a slot is provided in the second handle 54 , the opening of the slot faces the first handle 53 , and a third handle 69 is pivotably connected to the slot of the second handle 54 . The third handle 69 has an elongated end, and when the third handle 69 pivots relative to the second handle 54, the elongated end can abut against the second handle 54 to prevent the third handle 69 from continuing to pivot relative to the second handle 54 . In addition, the rod-shaped member 61 has a protruding portion 511. When the protruding portion 511 on the rod-shaped member 61 enters the groove of the second handle 54, the water pump pliers are locked; The long end can push the protruding part 511 out of the groove of the second handle 54, so that the water pump pliers are unlocked.

The self-adjusting water pump pliers of this embodiment also includes an elastic member 62 arranged between the second working part and the first handle. Specifically, the second working part 52 is provided with a hanging hole 64, and the groove of the first handle 53 A hook portion 63 is disposed inside, and one end of the elastic member 62 is restricted in the hanging hole, and the other end is connected to the hook portion 63 . The elastic member 62 in this embodiment is a spring, specifically a tension spring.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (42)

1. A hand tool, characterized in that, comprising: a first handle and a first working part fixedly connected to the first handle; a second handle and a second working portion pivotably connected to the second handle; the second working portion has a first position and a second position; and A working part connecting mechanism, the second working part is connected to the first working part through the working part connecting mechanism, and the working part connecting mechanism is configured to: when the second handle is moved away from the first handle When moving close to the first handle, the working part connecting mechanism moves the second working part from the first position to the second position; Wherein, the first position is the position where the second working part is far away from the first working part. When the second working part is in the second position, compared with the first position , the second working part rotates and translates relative to the first working part. 2. The hand tool according to claim 1, wherein the connecting mechanism of the working part comprises a hole provided on the first working part, a groove provided on the second working part and a The shaft of the hole on the first working part and the groove on the second working part; the shaft can move and rotate in the groove, so that the second working part can move relative to the first working part Turn and translate. 3. The hand tool according to claim 1, wherein the connecting mechanism of the working part comprises a hole provided on the second working part, a groove provided on the first working part and a The shaft of the hole on the second working part and the groove on the first working part; the shaft can move and rotate in the groove, so that the second working part can move relative to the first working part Turn and translate. 4. The hand tool according to claim 2 or 3, wherein the groove is a horizontal groove, an inclined groove or an arc groove. 5. The hand tool according to claim 1, wherein the connecting mechanism of the working part comprises: a first hole provided on the first working part, a first groove provided on the second working part, and a first shaft passing through the first hole and the first groove; a second hole provided on the second working part, a second groove provided on the first working part, and a second shaft passing through the second hole and the second groove; The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur. 6. The hand tool according to claim 1, wherein the connecting mechanism of the working part comprises: a first hole provided on the second working part, a first groove provided on the first working part, and a first shaft passing through the first hole and the first groove; a second hole provided on the first working part, a second groove provided on the second working part, and a second shaft passing through the second hole and the second groove; The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur. 7. The hand tool according to claim 5 or 6, characterized in that, the clearance between the first shaft and the first hole and the first groove is greater than, smaller than or equal to that between the second shaft and the first groove. The matching gap between the second hole and the second groove. 8. The hand tool according to claim 5 or 6, wherein the first groove is an arc groove or a square groove. 9. The hand tool according to claim 5 or 6, wherein the second groove is an arc groove or a square groove. 10. A hand tool, characterized in that it comprises: a first handle and a first working part fixedly connected to the first handle; a second handle and a second working part pivotably connected to the second handle; the second working part has a first position and a second position; A working part connecting mechanism, the second working part is connected to the first working part through the working part connecting mechanism, and the working part connecting mechanism is configured to: when the second handle is moved away from the first handle When moving close to the first handle, the working part connecting mechanism moves the second working part from the first position to the second position; and a rod disposed between the second handle and the first handle; Wherein, the first position is the position where the second working part is far away from the first working part. When the second working part is in the second position, compared with the first position , the second working part rotates and translates relative to the first working part. 11. The hand tool according to claim 10, wherein the connecting mechanism of the working part comprises a hole provided on the first working part, a groove provided on the second working part and a The shaft of the hole on the first working part and the groove on the second working part; the shaft can move and rotate in the groove, so that the second working part can move relative to the first working part Turn and translate. 12. The hand tool according to claim 10, wherein the connecting mechanism of the working part comprises a hole provided on the second working part, a groove provided on the first working part and a The shaft of the hole on the second working part and the groove on the first working part; the shaft can move and rotate in the groove, so that the second working part can move relative to the first working part Turn and translate. 13. The hand tool according to claim 11 or 12, wherein the groove is a horizontal groove, an inclined groove or an arc groove. 14. The hand tool according to claim 10, wherein the working part connecting mechanism comprises: a first hole provided on the first working part, a first groove provided on the second working part, and a first shaft passing through the first hole and the first groove; a second hole provided on the second working part, a second groove provided on the first working part, and a second shaft passing through the second hole and the second groove; The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur. 15. The hand tool according to claim 10, wherein the working part connecting mechanism comprises: a first hole provided on the second working part, a first groove provided on the first working part, and a first shaft passing through the first hole and the first groove; a second hole provided on the first working part, a second groove provided on the second working part, and a second shaft passing through the second hole and the second groove; The first shaft can move and rotate in the first groove, and the second shaft can move and rotate in the second groove, so that the second working part can move relative to the first working part. Rotation and translation occur. 16. The hand tool according to claim 14 or 15, characterized in that, the clearance between the first shaft and the first hole and the first groove is smaller than, equal to or greater than that between the second shaft and the first groove. The matching gap between the second hole and the second groove. 17. The hand tool according to claim 14 or 15, wherein the first groove is an arc groove or a square groove. 18. The hand tool according to claim 14 or 15, wherein the second groove is an arc groove or a square groove. 19. The hand tool according to claim 10, further comprising an elastic member disposed between the second working part and the first handle. 20. The hand tool according to claim 19, wherein a hanging hole is provided on the second working part, a hook is provided on the first handle, and one end of the elastic member is limited to the In the hanging hole, the other end is connected with the hook. 21. The hand tool according to claim 10, characterized in that the hand tool further comprises an adjusting screw, and the adjusting screw is threadedly connected to the tail of the first handle. 22. The hand tool of claim 21 , wherein the rod has a first end and a second end, the first end of the rod is pivotably connected to the second handle , the second end of the rod-shaped member is pivotally connected to the first handle and abuts against the adjusting screw. 23. The hand tool of claim 22, wherein said adjustment screw causes said second end of said rod to move relative to said first handle when said adjustment screw moves relative to said first handle. Move with one handle. 24. The hand tool according to claim 21, wherein a slot is provided in the first handle, and the opening of the slot faces the second handle. 25. The hand tool of claim 24, wherein a portion of the adjustment screw extends within a slot of the first handle and another portion is disposed outside of the first handle. 26. The hand tool according to claim 10, wherein a slot is provided in the second handle, and the opening of the slot faces the first handle. 27. The hand tool of claim 26, wherein a third handle is pivotally connected within the slot of the second handle. 28. The hand tool of claim 27, wherein the length of the third handle is less than the length of the second handle. 29. The hand tool of claim 27, wherein said third handle has an elongated end capable of abutting against said third handle when pivoted relative to said second handle. against the second handle to prevent the third handle from continuing to pivot relative to the second handle. 30. The hand tool of claim 29, wherein said rod has a protrusion, said hand tool is locked when said protrusion enters a slot in said second handle; The third handle can be rotated in the direction of the second handle, and the elongated end can push the protrusion out of the groove of the second handle, so that the hand tool is unlocked. 31. The hand tool of claim 27, wherein the portion where the third handle is connected to the second handle is separated from the portion where the rod is connected to the second handle The part where the rod-shaped member is connected to the second handle is further away from the second working part. 32. The hand tool according to claim 31, wherein the part where the rod-like member is connected to the second handle is separated from the part where the second working part is connected to the second handle. 33. A hand tool, comprising: a first handle and a first working part fixedly connected to the first handle; a second handle and a second working part pivotably connected to the second handle; the second working part has a first position and a second position; A working part connecting mechanism, the second working part is connected to the first working part through the working part connecting mechanism, and the working part connecting mechanism is configured to: when the second handle is moved away from the first handle When moving close to the first handle, the working part connecting mechanism moves the second working part from the first position to the second position; a rod disposed between the second handle and the first handle; and a limiting mechanism, the limiting mechanism is used to limit the displacement of the rod-shaped member relative to the second handle; Wherein, the first position is the position where the second working part is far away from the first working part. When the second working part is in the second position, compared with the first position , the second working part rotates and translates relative to the first working part. 34. The hand tool according to claim 33, wherein the limiting mechanism comprises a waist-shaped hole arranged on the second working part and a limiting shaft arranged in the waist-shaped hole, and the rod The shape member is pivotably connected to the second handle through the limiting shaft, and the limiting shaft cooperates with the waist-shaped hole to form the limiting mechanism. 35. A hand tool, comprising: a first handle and a first working part fixedly connected to the first handle; a second handle and a second working part pivotably connected to the second handle; the second working part has a first position and a second position; A working part connecting mechanism, the second working part is connected to the first working part through the working part connecting mechanism, and the working part connecting mechanism is configured to: when the second handle is moved away from the first handle When moving close to the first handle, the working part connecting mechanism moves the second working part from the first position to the second position; a sliding mechanism slidably mounted on the first handle; a rod-shaped member, one end of which is pivotally connected to the second handle, and the other end is pivotally mounted on the sliding mechanism; Wherein, the first position is the position where the second working part is far away from the first working part. When the second working part is in the second position, compared with the first position , the second working part rotates and translates relative to the first working part. 36. The hand tool according to claim 35, wherein one end of the rod-shaped member connected to the sliding mechanism is formed by a curved section, and the curvature of the curved section close to the first handle is larger than that farther away from the first handle. A curved section of the handle has a large curvature. 37. The hand tool of claim 35, further comprising a locking mechanism, said locking mechanism being slidably attached to said first handle and located on said sliding mechanism near the distal side of the first handle. 38. The hand tool according to claim 37, wherein the locking mechanism comprises a guide rod and a lock piece, and the guide rod is installed on the first handle and passes through the lock piece. 39. The hand tool according to claim 38, wherein the cross-section of the guide rod is a trapezoid with rounded corners, and there is a hole in the middle of the locking plate for the guide rod to pass through, and the hole is configured as It has a rounded trapezoid with the same cross-sectional shape as the guide rod, and the guide rod and the locking piece are in clearance fit. 40. The hand tool of claim 35, wherein said adjustment mechanism is mounted on said guide rod between said sliding mechanism and said locking mechanism, said adjustment mechanism being configured to The guide rod can be displaced in the length direction. 41. The hand tool of claim 40, wherein the adjustment mechanism is configured such that when the adjustment mechanism reaches a maximum displacement toward either end of the guide rod, when the hand tool is locked , the end of the rod-shaped member connected to the sliding mechanism can be in contact with the adjusting mechanism. 42. The hand tool according to claim 40, wherein the adjustment mechanism comprises an adjustment screw and a carrier, the carrier is installed on the guide rod, the adjustment screw is installed on the carrier, and can A displacement in the direction of the guide rod occurs relative to the carrier.