CN104139347B - Clamp - Google Patents

Abstract

The invention relates to a pliers with a joint, which has two pliers arms connected to each other via a joint, the pliers arms are divided into a handle section, a transition section and a head section with clamping jaws, the second clamping The jaws protrude transversely relative to the adjacent transition section, the additional first clamping jaw has an angle between approximately 35° and 55° relative to the adjacent transition section, the S-shaped inner contour of the clamping jaw forms the jaws The case has a serrated profile with teeth, the jaws are parallelogram-shaped when the tips of the clamping jaws come into contact, wherein the long inner contour of the jaws is formed by serrations with teeth with unequal length sides in longitudinal section Contour formation, the short inner contour of the jaws and the inner contour of the tip of the clamping jaw are formed by a sawtooth profile with teeth with equal length sides in longitudinal section, the arrangement of the jaws in the second clamping jaw The long second saw-tooth profile of the first clamping jaw extends in a straight line, and the long first saw-tooth profile in the first clamping jaw extends convexly towards the second saw-tooth profile.

Description

clamp

technical field

The invention relates to a clamp with adjustable joints.

Background technique

Such clamps are considered prior art within the scope of EP 0 528 252 A1. The pliers have two pliers arms which are connected to each other via a joint and which are divided into a handle section, a transition section and a head section with clamping jaws. The second clamping jaw is arranged transversely protrudingly relative to the adjacent transition section and the first further clamping jaw is arranged at an angle of 45° to the adjacent transition section. The inner contour of the clamping jaw is S-shaped. A parallelogram-shaped jaw is thus formed by the clamping jaws when their tips are in contact with one another. The long inner contour of the jaws is designed as a sawtooth contour with triangular teeth in longitudinal section. The inner contour of the clamping jaw next to the jaws also has a serrated contour with triangular teeth in longitudinal section.

Contents of the invention

Starting from the prior art, the object of the present invention is to further improve the known tongs in such a way that it is significantly simplified even in difficult assembly situations and in the case of a better contact with the object in longer-term applications Assembler's operations.

According to the invention, this object is achieved by a pliers with an adjustable joint, which has two pliers arms connected to each other via the joint, which are divided into a handle section, a transition section and a handle section. Head section with clamping jaws, wherein the second clamping jaw is arranged transversely protruding relative to the adjacent transition section, and the first further clamping jaw is at an angle between approximately 35° and 55° relative to the adjacent transition section The angle between them is set, and the S-shaped inner contours of the clamping jaws facing each other have a saw-toothed profile with triangular teeth in longitudinal section when forming the jaws, The tips of the plates are in the shape of a parallelogram when they touch each other, characterized in that the long inner contour of the parallelogram jaws consists of a saw-toothed contour with teeth with sides of unequal length in longitudinal section, while the short inner contour of the jaws The profile and the inner profile of the tip of the clamping jaw consist of a serration profile with teeth having equal length sides in longitudinal section, wherein the long second serration profile of the jaws is arranged in the second clamping jaw While the long first sawtooth profile in the first clamping jaw extends convexly towards the second sawtooth profile.

The following content is an advantageous modification of the present invention.

According to the invention, the long inner contour of the jaws of the parallelogram now consists of a saw-toothed contour with teeth with unequal sides in longitudinal section, while the short inner contour of the jaws and the sharp edges of the clamping jaws The inner contour consists of a saw-toothed contour with teeth having equal-length sides in longitudinal section. It is also important that the long second sawtooth profile of the jaws arranged in the second clamping jaw runs straight, while the long first sawtooth profile in the first clamping jaw is convex towards the second sawtooth profile Extend from ground to ground.

In particular, the use of clamping pliers constructed as water pump pliers has the advantage that, on the one hand, objects can be securely clamped and manipulated by the tips of the clamping jaws, while on the other hand, by means of the parallelogram-shaped jaws Special construction, due to the special sawtooth profile provided there, enables perfect clamping in all cases of use with circular or polygonal cross-sections whose surfaces may be soiled, for example, by lubricants and which have only weak slip resistance permanent objects and perform reliable operations.

When the teeth of the saw-tooth profile on the inside of the tip engage each other form-lockingly, the long sides of the teeth of the long saw-tooth profile in the jaws are almost parallel to each other and longitudinally relative to the center intersecting the teeth of the inside of the tip. The planes are arranged parallel to each other.

Also in this respect, the average distance of the long first sawtooth profile of the jaws relative to the long second sawtooth profile is preferably 4.5 mm.

The teeth of the long second serration profile in the jaws had a height of 0.52mm and the teeth of the long first serration profile had a height of 0.58mm. This means that the teeth of the convexly running sawtooth profile in the jaws are configured higher than the teeth of the straightly running sawtooth profile.

The clamping of the object by the tongs and its reliable handling after clamping are improved by the fact that the opening angle between the short sides of the teeth of the long saw-tooth profile in the jaws and the long sides of the corresponding adjacent teeth is 105°. In addition, between the short sides of the long serrated profile teeth in the jaws and the central longitudinal plane intersecting the teeth of the serrated profile inside the tip when the teeth of the serrated profile inside the tip are positively engaged with each other The opening angle is 70°.

In addition, it has proven to be advantageous if the teeth of the short saw-tooth profile in the jaws have a height of 0.36 mm.

The long sawtooth profile in the jaws is preferably arranged at an angle of 15° relative to a central longitudinal plane intersecting the teeth of the sawtooth profile on the inside of the tip when the teeth of the sawtooth profile of the tip engage each other in a form-locking manner.

The opening angle between the long sawtooth profile arranged in the jaws and the adjacent short sawtooth profile is 135°.

The opening angle between the two teeth of the sawtooth profile on the inside of the tip, the short sawtooth profile in the jaws and the sawtooth profile on the side of the jaw facing away from the tip with equal sides is 90°.

The length of the jaws is preferably 21.4mm.

A further improvement of the handling of the pliers is achieved by the fact that the inner sawtooth profile facing away from these tips and next to the jaws extends linearly, opposite to each other when the teeth of the inner sawtooth profiles of the tips engage one another in a form-locking manner. The teeth are arranged at a distance from each other and are provided with equal-length sides in longitudinal section. It is also useful in this case that the inner sawtooth contours facing away from the tip and next to the jaws are arranged relative to one another at an angle of 2.4° away from the tip.

A semicircular recess is formed in the inner sawtooth contour of the second clamping jaw next to the jaws. The recess has a radius of 2 mm.

Finally, in the tongs according to the invention there is also the advantage that the first tong arm has a longitudinal slot in its transition section, while the second tong arm passes through the longitudinal slot with its transition section and has a sawtooth profile An elongated hole, wherein a locking element is mounted linearly displaceable in the second pliers arm, around which locking element the first pliers arm is rotatable. In this way, various relative positions of the tong arms in which the two tong arms are arranged linearly fixed but rotatable relative to each other can be adjusted via the locking element.

Finally, it is also suitable that the tong arm is produced by forging. In this way high strength properties are achieved with the potential for weight savings. Preferably the pliers arms are made of steel which guarantees the long life of the pliers.

Description of drawings

The invention is further elucidated below with reference to the embodiments shown in the drawings. In the attached picture:

Figure 1 shows a side view of the clamp;

Figure 2 shows a view of the tongs viewed in the direction of arrow II of Figure 1;

Figure 3 shows a side view of the clamping area of the pliers;

FIG. 4 also shows an enlarged detail of the clamping region of FIG. 3 in side view; and

FIG. 5 again shows an enlarged detail of the clamping region.

detailed description

Figures 1 and 2 mark the clamps of the water pump clamps in the form of 1. The tongs 1 have a first tong arm 2 and a second tong arm 3 , which are coupled to one another via an adjustable joint 4 .

Each pliers arm 2, 3 is divided into a handle section 5, 5a, a transition section 6, 6a and a head section 7, 7a with clamping jaws 8, 8a.

Furthermore, it can be seen from FIG. 2 that the first pliers arm 2 has a longitudinal slot 9 in its transition section 6 , while the second pliers arm 3 passes through said longitudinal slot 9 with its transition section 6 a.

Furthermore, the tongs 1 have a locking mechanism 10 which permits a translational adjustment movement of the second tongs arm 3 relative to the first tongs arm 2 , in this way a stepwise adjustment of the tongs 1 in the head section 7 , 7 a is possible. The opening width between.

In order to carry out the translational adjustment movement, an elongated hole 11 is provided in the transition section 6 a of the second pliers arm 3 , which each has a saw-tooth-shaped detent contour 12 on its inner longitudinal edge. In addition, an actuating lever 13 is arranged on the first pliers arm 2 , which when actuated moves the locking element 14 in the axial direction, so that it shifts from the locking position into the unlocking position and thus A translational adjustment movement of the first pliers arm 2 relative to the second pliers arm 3 can be realized. If the locking element 14 is then in the new locked position, the two pliers arms 2 , 3 can pivot about the joint 4 .

As can be clearly seen in FIGS. 1 and 3 , the second clamping jaw 8 a of the second tong arm 3 is arranged laterally projecting at an angle α of 90° relative to the adjoining transition section 6 a, while the first tong arm The first clamping jaw 8 on 2 is arranged at an angle β of 45° relative to the adjacent transition section 6 .

In addition, it can be seen particularly with reference to FIGS. 4 and 5 that the mutually facing S-shaped inner contours of the clamping jaws 8 , 8 a form the jaws 17 with teeth 23 , which are triangular in longitudinal section, 24 sawtooth profile 18 to 22, the jaws are parallelogram-shaped when the tips 15, 16 of the clamping jaws 8, 8a are in contact with each other.

In this regard, FIGS. 4 and 5 additionally show that the long inner contour of the parallelogram jaws 17 consists of sawtooth contours 18, 19 with teeth 23 having unequal sides 25, 26 in longitudinal section, while The short inner contours in the jaws 17 and the inner contours of the tips 15 , 16 of the clamping jaws 8 , 8 a are formed by sawtooth contours 20 , 21 , 22 with teeth 24 having equal-length sides 27 in longitudinal section. In addition, it can be seen that the long second sawtooth profile 19 arranged in the second clamping jaw 8a in the jaw 17 runs straight, while the long first sawtooth profile 18 located in the first clamping jaw 8 runs towards the second The two sawtooth contours 19 run convexly on the other side. The radius R of the raised sawtooth profile 18 is 45mm.

When the teeth 24 of the sawtooth profiles 22 inside the tips 15, 16 are positively engaged with each other (FIG. 5), the long sides 25 of the teeth 23 of the long sawtooth profiles 18, 19 in the jaws 17 are almost parallel to each other and opposite to each other. The central longitudinal plane MLE intersecting the teeth 24 of the sawtooth profile 22 inside the tips 15 , 16 is arranged parallel. In this case, the average distance A of the long second sawtooth profile 19 from the long first sawtooth profile 18 in the jaws 17 is 4.5 mm. The height H of the teeth 23 of the long second sawtooth profile 19 in the jaws 17 is 0.52 mm and the height H1 of the teeth 23 of the long _first sawtooth profile 18 is 0.58 mm.

As shown in FIG. 3 , the opening angle γ between the short sides 26 of the teeth 23 of the long sawtooth profiles 18 , 19 in the jaws 17 and the long sides 25 of the respective adjacent teeth 23 is 105°. In contrast, the opening angle δ between the short sides 26 of the teeth 23 of the long sawtooth profile 18 , 19 in the jaws 17 and the central longitudinal plane MLE which intersects the teeth 24 of the sawtooth profile 22 inside the tips 15 , 16 is 70°.

The height H2 of the teeth 24 of the sawtooth profiles 20 , 21 of the short inner profile in the jaws 17 is 0.36 mm ( FIG. 5 ).

When the teeth 24 of the sawtooth profiles 22 of the tips 15, 16 positively engage each other, the long sawtooth profiles 18, 19 in the jaws 17 intersect with respect to the teeth 24 of the sawtooth profiles 22 inside the tips 15, 16. The central longitudinal plane MLE of is set at an included angle ε of 15°. The opening angle ζ between the long sawtooth profiles 18 , 19 situated in the jaws 17 and the adjacent short sawtooth profiles 20 , 21 is 135° ( FIG. 3 ).

The length L of the jaws 17 is 21.4 mm (FIG. 5).

When the teeth 24 of the sawtooth profiles 22 on the inside of the tips 15 , 16 positively engage one another, the inner sawtooth profiles 28 , 29 ( FIG. 4 ) facing away from these tips 15 , 16 and next to the jaws 17 extend linearly. and are arranged at a distance from one another and provided with teeth 30 having equal-length sides 27 in longitudinal section ( FIGS. 4 and 5 ). It can furthermore be seen that these internal sawtooth profiles 28 , 29 are arranged to diverge from the tips 15 , 16 by an angle η of 2.4° ( FIG. 3 ).

A semicircular recess 31 is formed in the inner sawtooth contour 28 of the second clamping jaw 8 a next to the jaws 17 . This recess has a radius R ₁ of 2 mm ( FIGS. 4 and 5 ).

Two adjoining teeth 24 of the sawtooth profile 20 , 21 , 22 , 28 and 29 on the inner side of the tip 15 , 16 , of the short inner contour of the jaw 17 and on the side of the jaw 17 facing away from the tip 15 , 16 The opening angle θ between the side faces 27 is 90°.

List of reference signs

1 clamp

2 First clamp arm

3 Second tong arm

4 festivals

5 2 handle segments

5a 3 handle segment

6 2 transition section

Transition to 6a 3

7 2 header section

7a 3 header segment

8 2 first clamping jaws

Second clamping jaw of 8a 3

9 Longitudinal gaps in 6

10 Locking mechanism

11 Slotted hole in 6a

Snap-on profile in 12 11

13 joystick

14 Locking parts

15 tips of 8

Tip of 16 8a

17 Jaws

Long sawtooth profile on 18 8

Long sawtooth profile on 19 8a

Short sawtooth profile on 20 8

Short sawtooth profile on 21 8a

Serrated profile on 22 15 and 16

23 18 and 19 teeth

24 20, 21, 22 teeth

Long side of 25 23

Short side of 26 23

Side of 27 24

The jagged outline next to 28 17

The jagged outline next to 29 17

30 28, 29 teeth

31 Recess in 28

A Distance between 18 and 19

Height of 23 in H 19

Height of 23 in H ₁ 18

Height of H ₂ 24

Length of L 17

Radius of R 18

Radius of R1 31

Center longitudinal plane between MLE 15 and 24 of 16

α Angle between 6a and 8a

β Angle between 6 and 8

The angle between γ 25 and 26

Angle between δ 26 and MLE

Angle between ε 18, 19 and MLE

ζ Angle between 18, 19 and 20, 21

The angle between η 28 and 29

Angle between θ 27

Claims (17)

1. Pliers (1) with an adjustable joint (4), which has two pliers arms (2, 3) coupled to each other via said joint (4), which are divided into handle sections in each case (5, 5a), transition section (6, 6a) and head section (7, 7a) with clamping jaws (8, 8a), wherein the second clamping jaw (8a) is opposite the adjoining transition section (6a) is arranged laterally protrudingly, while the additional first clamping jaw (8) is arranged at an angle (β) between 35° and 55° relative to the adjacent transition section (6), and the clamping jaw ( The mutually facing S-shaped inner contours of 8, 8a) have a saw-toothed contour (18, 19, 20, 21) with triangular teeth (23, 24) in longitudinal section when they form the jaws (17). ), said jaws are parallelogram-shaped when the tips (15, 16) of the clamping jaws (8, 8a) are in contact with each other, characterized in that the long inner contour of the parallelogram-shaped jaws (17) consists of The serrated profile (18, 19) of the teeth (23) with unequal sides (25, 26) in longitudinal section is formed, while the short inner profile of the jaws (17) and the clamping jaws (8, 8a) The inner profile of the tip (15, 16) consists of a sawtooth profile (20, 21, 22) with teeth (24) having equal length sides (27) in longitudinal section, wherein the jaws (17) are set The long second sawtooth profile (19) in the second clamping jaw (8a) runs straight, while the long first sawtooth profile (18) in the first clamping jaw (8) faces the second sawtooth The contour ( 19 ) runs convexly on that side. 2. Pliers according to claim 1, characterized in that the teeth (24) of the sawtooth profile (22) on the inside of the tips (15, 16) engage each other in a form-fitting manner. The long sides (25) of the teeth (23) of the long sawtooth profile (18, 19) are almost parallel to each other and with respect to the central longitudinal plane intersecting the tooth (24) of the sawtooth profile (22) inside the tip (15, 16) (MLE) are set in parallel. 3. The pliers as claimed in claim 1 or 2, characterized in that the jaws (17) when the teeth (24) of the sawtooth profile (22) on the inside of the tips (15, 16) mesh positively with each other The average distance (A) of the long second sawtooth profile (19) relative to the long first sawtooth profile (18) is 4.5 mm. 4. The pliers according to claim 1 or 2, characterized in that: the height (H) of the teeth (23) of the long second sawtooth profile (19) in the jaws (17) is 0.52 mm, and the length The height (H ₁ ) of the teeth (23) of the first sawtooth profile (18) is 0.58 mm. 5. The tongs as claimed in claim 1 or 2, characterized in that the short sides (26) of the teeth (23) of the long sawtooth profile (18, 19) in the jaws (17) are aligned with the corresponding adjacent teeth The opening angle (γ) between the long sides (25) of (23) is 105°. 6. Pliers according to claim 1 or 2, characterized in that the jaws ( The short sides (26) of the teeth (23) of the long sawtooth profile (18, 19) in 17) and the central longitudinal plane ( The opening angle (δ) between MLE) is 70°. 7. The tongs as claimed in claim 1 or 2, characterized in that the height (H ₂ ) of the teeth (24) of the sawtooth profile (20, 21 ) of the short inner profile in the jaw (17) is 0.36 mm. 8. The pliers according to claim 1 or 2, characterized in that the jaws (17) when the teeth (24) of the sawtooth profile (22) of the tips (15, 16) engage each other positively ) at an angle ( ε) setting. 9. The tongs as claimed in claim 1 or 2, characterized in that there is a distance between the long sawtooth profile (18, 19) and the adjacent short sawtooth profile (20, 21) in the jaw (17). The opening angle (ζ) is 135°. 10. Pliers according to claim 1 or 2, characterized in that of the saw-tooth profile (22) inside the tip (15, 16), of the short saw-tooth profile (20, 21) in the jaws (17) And the opening angle (θ) between the two teeth (24) of the serrated profile (28, 29) with equal length sides (27) on the side of the jaw (17) facing away from the tip (15, 16) is 90°. 11. The clamp according to claim 1 or 2, characterized in that the length (L) of the jaw (17) is 21.4mm. 12. The pliers according to claim 1 or 2, characterized in that the teeth (24) of the sawtooth profiles (22) inside the tips (15, 16) face away from these tips ( 15, 16) and beside the jaws (17) the inner sawtooth contours (28, 29) run linearly, are arranged at a distance relative to each other and are provided with teeth with equal length sides (27) in longitudinal section (30). 13. Pliers according to claim 12, characterized by an inner serration profile (28, 29) facing away from the tip (15, 16) and next to the jaw (17) to leave the tip (15, 16) It is set with an included angle (η) of 2.4°. 14. The tongs according to claim 12, characterized in that a semicircular recess ( 31). 15. Clamp according to claim 14, characterized in that the recess (31) has a radius (R ₁ ) of 2 mm. 16. The tongs according to claim 1 or 2, characterized in that the first tong arm (2) has a longitudinal slot (9) in its transition section (6), and the second tong arm (3) has a longitudinal gap (9) in its transition section (6). The transition section (6a) passes through the longitudinal slot (9) and has an elongated hole (11) with two mutually opposite locking contours (12), wherein, in the second pliers arm (3) A locking piece (14) is supported in a linearly movable manner, and the first pliers arm (2) can rotate around the locking piece. 17. Pliers according to claim 1 or 2, characterized in that the pliers arms (2, 3) are produced by forging technology.