CN112211894A - Flexible shaft, brake device and train - Google Patents

Abstract

The invention provides a flexible shaft, a braking device and a train, belongs to the technical field of vehicle braking, and comprises a sleeve and a plurality of chain links. A plurality of chain links connect gradually to wear to locate in the sleeve, adjacent chain link rotatable coupling is used for cooperating the sleeve and buckles, and the connecting portion of adjacent chain link be with sleeve inner wall sliding fit's spheroid structure. The flexible shaft is adopted by both the braking device and the train. According to the flexible shaft provided by the invention, the chain links are sequentially connected and penetrate through the sleeve and can slide along the sleeve, the adjacent chain links are hinged and matched with the bending angle adjustment of the sleeve, meanwhile, the connecting parts of the adjacent chain links are of the spherical structures, when the chain links slide along the sleeve and pass through the straight section and the bending section of the sleeve, the chain links can contact the inner wall of the sleeve through the cambered surfaces of the spherical structures, the friction force between the chain links and the sleeve is reduced, a large force is not required to be used for pulling the chain links, and the operation is simpler and more convenient.

Description

A flexible shaft, braking device and train

technical field

The invention belongs to the technical field of vehicle braking, and more particularly relates to a flexible shaft, a braking device using the flexible shaft and a train using the flexible shaft.

Background technique

The braking device is applied to the rail vehicle by mechanical means, and usually the braking device is connected with the basic braking device through a flexible shaft. The conventional flexible shaft is the structure of the casing and the wire rope. The wire rope is worn in the casing, and the force is transmitted through the wire rope. Due to the influence of the installation position of the braking device and the size of the use space, when the flexible shaft is actually used, it needs to be adjusted. After many times of bending, since the bending angles of the casing and the wire rope cannot be consistent, an invalid stroke will occur, and the wire rope at the bending part will partially abut on the inner wall of the casing, which increases the friction of the wire rope when it moves in the casing. When the hose is bent for many times to complete the transmission of force, it needs to overcome more frictional force, and it needs to provide a large pulling force, which is difficult to operate.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a flexible shaft, which aims to solve the problem that after the flexible shaft is bent for many times, an invalid stroke will be generated, a large pulling force needs to be used, and the operation is difficult.

In order to achieve the above purpose, the technical scheme adopted in the present invention is to provide a flexible shaft, comprising:

casing;

a plurality of chain links, the plurality of chain links are hinged in sequence, and pass through the casing, and the connecting parts where the adjacent chain links are hinged to each other are spherical structures;

A plurality of the chain links are slidably abutted on the inner wall of the sleeve through the spherical structure, and are used for cooperating with the sleeve to bend.

Further, the adjacent chain links are hinged through pin shafts, and the adjacent pin shafts are axially arranged at an included angle.

Further, the axial included angle between the adjacent pin shafts is 90°.

Further, the sleeve is filled with grease.

Further, the chain link includes:

Connecting rod;

a first connecting end fixedly arranged at one end of the connecting rod;

The second connecting end is fixedly arranged on the other end of the connecting rod;

The first connection end of the chain link and the second connection end of the adjacent chain link are hingedly arranged through a pin shaft to form the spherical structure in sliding abutment with the inner wall of the sleeve.

Further, the connecting rod is connected with the connecting part of the first connecting end and the connecting part of the second connecting end respectively, and the outer diameter of the connecting rod is smaller than that of the first connecting end or the second connecting end. The outer diameter of the connection end.

The beneficial effect of the flexible shaft provided by the present invention is that compared with the prior art, the flexible shaft of the present invention is connected by a plurality of chain links in sequence, and is passed through the casing and can slide along the casing. The chain link is hinged to adjust the bending angle of the casing, and the connecting parts of the adjacent chain links are spherical structures. The arc surface of each spherical structure contacts the inner wall of the casing, reducing the friction between the chain link and the casing, without using a large force to pull multiple chain links, and the operation is more convenient.

The present invention also provides a braking device, including the above-mentioned flexible shaft, and also includes:

a joint, which is fixedly arranged at one end of the sleeve, and is used for fixing the sleeve on the vehicle;

The pull rod is threaded and slidably arranged in the sleeve, and is connected with one of the chain links at the end, and is used to drive a plurality of the chain links to move along the length of the sleeve.

The beneficial effect of the braking device provided by the present invention is that compared with the prior art, the present invention adopts the flexible shaft, the sleeve is fixed on the vehicle through the joint, the plurality of chain links are connected in sequence, and the sleeve is passed through the sleeve. In the tube, a plurality of chain links are driven to slide along the casing by the pull rod, and the adjacent chain links are hinged to adjust the bending angle of the casing. At the same time, the connecting parts of adjacent chain links are spherical structures. When the pipe slides through the straight section and the bent section of the casing, it can contact the inner wall of the casing through the arc surface of multiple spherical structures, reducing the friction between the chain link and the casing, without using a large force to pull multiple chain links , the operation is easier.

Further, the braking device also includes:

The sheath is sleeved on the sleeve and fixedly connected with the joint.

Further, the joint includes:

a fixing tube, which is fixedly arranged at one end of the sleeve, and is used for crimping and fixing the sleeve and the sheath for crimping;

The threaded connection pipe is fixedly arranged at one end of the fixed pipe, the outer wall of the threaded connection pipe is provided with a locking nut for fixing the sleeve on the vehicle through threads, the tie rod and a plurality of the chain links It is threaded and slidably arranged in the threaded connection pipe.

The present invention also provides a train, including the above-mentioned flexible shaft.

The beneficial effect of the train provided by the present invention is that compared with the prior art, the present invention adopts the braking device, which is connected by a plurality of chain links in sequence, and is penetrated in the casing, and can slide along the casing. The adjacent chain links are hinged to adjust the bending angle of the casing, and the connecting parts of the adjacent chain links are spherical structures. The arc surfaces of the multiple spherical structures contact the inner wall of the casing, reducing the friction between the chain link and the casing, without using a large force to pull multiple chain links, and the operation is more convenient.

Description of drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a braking device according to an embodiment of the present invention;

2 is a cross-sectional view of a braking device according to an embodiment of the present invention;

3 is a schematic structural diagram of a flexible shaft provided by an embodiment of the present invention;

4 is a schematic structural diagram of a chain link of a flexible shaft provided by an embodiment of the present invention;

5 is a schematic structural diagram of a pin shaft of a flexible shaft provided by an embodiment of the present invention;

6 is a cross-sectional view of a flexible shaft provided by an embodiment of the present invention;

FIG. 7 is an enlarged view of A in FIG. 6 .

In the figure: 1, sleeve; 2, chain link; 201, connecting rod; 202, first connecting end; 203, second connecting end; 3, pin shaft; 4, joint; 5, tie rod; 6, sheath; 401, fixed pipe; 402, threaded connection pipe; 403, lock nut; 7, oil filling hole; 8, blocking bolt; 9, elastic rope; 10, connecting ring.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

A flexible shaft provided by the present invention will now be described. Please refer to Fig. 1 to Fig. 3, a flexible shaft including a sleeve 1 and a chain link 2.

A plurality of chain links 2 are hinged in sequence, and pass through the casing 1, and the connecting parts where the adjacent chain links 2 are hinged to each other are spherical structures; the plurality of chain links 2 can be slidably abutted on the inner wall of the casing 1 through the spherical structure. , and is used to fit the casing 1 for bending.

The casing 1 is a steel pipe or a metal hose. When the casing 1 is a steel pipe, it needs to be bent according to the installation space inside the vehicle. The inner diameter of the casing 1 should be slightly larger than the outer diameter of the spherical structure of the chain link 2 to avoid the casing 1. After rigid bending, the inner cavity is partially deformed, which affects the movement of the chain link 2; when the sleeve 1 is a metal hose, the metal hose can be a corrugated pipe or a mesh pipe, and a sheath 6 needs to be wrapped on the outside of the metal hose. 6 is a rubber sleeve for protecting the metal hose. A plurality of chain links 2 can be rotated to form a connecting bar that can rotate freely in multiple directions. The spherical structure of the connecting part of the adjacent chain links 2 fits the inside of the sleeve 1, reducing the friction between the chain links 2 and the sleeve 1. force.

Compared with the prior art, the flexible shaft provided by the present invention is connected by a plurality of chain links 2 in sequence, and is passed through the casing 1 and can slide along the casing 1. The chain link 2 is hinged to adjust the bending angle of the sleeve 1, and the connecting parts of the adjacent chain links 2 are spherical structures. At the time, the arc surfaces of the multiple spherical structures can contact the inner wall of the casing 1 to reduce the friction between the chain link 2 and the casing 1, and there is no need to use a large force to pull multiple chain links 2, and the operation is more convenient.

As a specific embodiment of the present invention, please refer to FIG. 3 to FIG. 5 , the adjacent chain links 2 are hinged through pin shafts 3 , and the adjacent pin shafts 3 are arranged at an included angle in the axial direction. In this embodiment, the two pin shafts 3 of the adjacent chain links 2 are arranged at an included angle to realize the rotation of the adjacent chain links 2 at different angles. The entire chain link 2 can be bent in all directions, which can well match the bending of the sleeve 1 and avoid the situation that the chain link 2 is jammed.

As a specific embodiment of the present invention, please refer to FIG. 3 to FIG. 5 , the axial included angle of the adjacent pin shafts 3 is 90°. In this embodiment, the included angle between the adjacent pin shafts 3 in the axial direction is 90°, so that the adjacent chain links 2 can be bent at various angles in the same plane, and the plurality of chain links 2 connected in sequence can realize multi-plane The bending of the angle can realize the space bending of 2 chain links.

As a specific embodiment of the present invention, please refer to FIG. 6 and FIG. 7 , the sleeve 1 is filled with grease. In this embodiment, the grease can further reduce the friction between the chain link 2 and the inner wall of the casing 1, so that the chain links 2 can move more easily in the casing 1, and a plurality of threaded oil injection holes are sequentially opened along the length of the casing 1 7. It is used to inject grease into the casing 1. A plugging bolt 8 is installed on the oil filling hole 7. The grease flows out. In addition, the end of the plugging bolt 8 is provided with a connecting ring 10. The connecting ring 10 is rotatably installed on the plugging bolt 8 through the connecting shaft. The connecting shaft is installed on the plugging bolt 8 through the threaded hole. The oil filling hole 7 One side is also rotatably installed with a connecting ring 10 through the connecting shaft, which corresponds to the number of oil filling holes 7 one-to-one. The corresponding two connecting rings 10 are connected by elastic rope 9. When it is necessary to use the oil filling hole 7 to inject grease, put The blocking bolt 8 is unscrewed from the threaded oil filling hole 7, and the elastic rope 9 is always connected to the blocking bolt 8, which can prevent the blocking bolt 8 from falling off and being accidentally lost.

As a specific embodiment of the present invention, please refer to FIG. 3 to FIG. 5 , the chain link 2 includes a connecting rod 201 , a first connecting end 202 and a second connecting end 203 .

The first connecting end 202 is fixedly arranged at one end of the connecting rod 201; the second connecting end 203 is fixedly arranged at the other end of the connecting rod 201; the first connecting end 202 of the chain link 2 and the second connecting end 203 of the adjacent chain link 2 The pin shaft 3 is hingedly arranged to form a spherical structure that is slidingly matched with the inner wall of the sleeve 1 . In this embodiment, the first connecting end 202 is a spherical structure, a groove is formed at the end, and a through hole is formed through the first connecting end 202, the central axis of the through hole passes through the center of the spherical structure, and is connected with the groove. The side wall of the first connection end 202 is vertical; the second connection end 203 is a wafer structure, and the side wall is arc-shaped, which can be inserted into the groove of the first connection end 202 to form a complete spherical structure. Similarly, the second connection end The end face of 203 is provided with a through hole. The through hole has the same diameter as the through hole of the first connection end 202. The through hole is perpendicular to the end face of the wafer structure. When the second connection end 203 is inserted into the first connection of the adjacent connection When inside the end 202, the two through holes are matched, and the pin shaft 3 is used to pass through the two through holes, so as to complete the fixing of the adjacent chain links 2, and at the same time, ensure that the connecting part has a spherical structure.

As a specific embodiment of the present invention, please refer to FIG. 3 and FIG. 4 , the connecting rod 201 is respectively connected with the connecting part of the first connecting end 202 and the connecting part of the second connecting end 203 by arc transition, and the outer part of the connecting rod 201 The diameter is smaller than the outer diameter of the first connection end 202 or the second connection end 203 . In this embodiment, the connecting rod 201 , the first connecting end 202 and the second connecting end 203 are integrally formed, and the two ends of the connecting rod 201 are connected with the arc surfaces of the first connecting end 202 and the second connecting end 203 through an arc transition. The outer diameter of the connecting rod 201 is smaller than the outer diameter of the spherical structures at both ends, so that the spherical structures can always contact the inner wall of the sleeve 1 and ensure smoother movement of the two chain links.

The present invention also provides a braking device, please refer to FIG. 1 and FIG. 2 . A braking device adopts the above-mentioned flexible shaft, and further includes a joint 4 and a pull rod 5 .

The joint 4 is fixedly arranged at one end of the casing 1 for fixing the casing 1 on the vehicle; the tie rod 5 is threaded and slidably arranged in the casing 1, and is connected with a chain link 2 at the end for driving multiple The chain links 2 move along the length of the sleeve 1 .

The joint 4 can be fixed at positions such as vehicle brackets, bottom plates, etc. When the pull rod 5 is pulled, the fixed part is the support point of the force, keeping the sleeve 1 stable, so as to realize the movement along the sleeve 1 under the pulling force of the pull rod 5 . The end of the pull rod 5 is provided with a block, and the outer diameter of the block is larger than the inner diameter of the joint 4 to prevent the pull rod 5 from accidentally passing through the joint 4 into the casing 1 and difficult to take out.

The present invention also includes a braking device using the above-mentioned flexible shaft. Compared with the prior art, since the braking device adopts the flexible shaft, the sleeve 1 is fixed on the vehicle through the joint 4, and the plurality of chain links 2 are connected in sequence, and the wear Set in the casing 1, a plurality of chain links 2 are driven by the pull rod 5 to slide along the casing 1, the adjacent chain links 2 are hinged to adjust the bending angle of the casing 1, and the connecting parts of the adjacent chain links 2 It is a spherical structure, when a plurality of chain links 2 slide along the casing 1 through the straight section and the bent section of the casing 1, they can contact the inner wall of the casing 1 through the arc surface of the plurality of spherical structures, reducing the number of chain links 2 and the casing. The friction force of the tube 1 eliminates the need to use a large force to pull multiple chain links 2, and the operation is easier.

As a specific embodiment of the present invention, please refer to FIG. 1 and FIG. 2 , a braking device further includes a sheath 6 .

The sheath 6 is sleeved on the sleeve 1 and is fixedly connected with the joint 4 . In this embodiment, the sheath 6 is a rubber sheath, which is sheathed outside the casing 1 to protect the metal hose.

As a specific embodiment of the present invention, please refer to FIG. 1 and FIG. 2 , the joint 4 includes a fixed pipe 401 and a threaded connection pipe 402 .

The fixing pipe 401 is fixedly arranged at one end of the sleeve 1 for crimping the fixing sleeve 1 and the sheath 6 for crimping; the threaded connection pipe 402 is fixedly arranged at one end of the fixing pipe 401, and the outer wall of the threaded connection pipe 402 is threaded to be useful For the locking nut 403 for fixing the sleeve 1 on the vehicle, the tie rod 5 and the plurality of chain links 2 are passed through and slidably arranged in the threaded connection pipe 402 . In this embodiment, the fixed pipe 401 and the threaded connection pipe 402 are integrally formed, the inner diameter of the sleeve 1 and the threaded connection pipe 402 are the same, the two chain links can also move along the inner diameter of the threaded connection pipe 402, and the sheath 6 is sleeved on the sleeve Outside the pipe 1, the end is crimped into the fixed pipe 401 by a crimping machine or crimping pliers, so that the sleeve 1 and the sheath 6 are fixed in the fixed pipe 401, and the outer wall of the threaded connection pipe 402 is threadedly installed with The locking nut 403, the locking thread includes at least two nuts, the adjacent nuts can clamp the bracket on the vehicle, so that the threaded connection pipe 402 can be fixed with the vehicle, that is, the casing 1 and the vehicle can be fixed, and adjacent nuts may exist One fixed nut and the rest are rotatable nuts on the outer wall of the threaded connection pipe 402, or all of them can be rotatable nuts, and the spacing between adjacent nuts can be adjusted according to different connecting parts of the vehicle.

The present invention also provides a train, which adopts the above-mentioned flexible shaft. Compared with the prior art, because the train adopts the braking device, it is connected by a plurality of chain links 2 in sequence, and passes through the casing 1, so that the Sliding along the casing 1, the adjacent chain links 2 are hinged to adjust the bending angle of the casing 1, and the connecting parts of the adjacent chain links 2 are spherical structures. When a plurality of chain links 2 slide along the casing 1 through the casing When the straight section and the bending section of the pipe 1, both can contact the inner wall of the casing 1 through the arc surface of the multiple spherical structure, reduce the friction between the chain link 2 and the casing 1, and do not need to use a large force to pull multiple chain links 2. The operation is easier.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. a flexible shaft, is characterized in that, comprises: casing; a plurality of chain links, the plurality of chain links are hinged in sequence, and pass through the casing, and the connecting parts where the adjacent chain links are hinged to each other are spherical structures; A plurality of the chain links are slidably abutted on the inner wall of the sleeve through the spherical structure, and are used for cooperating with the sleeve to bend. 2 . The flexible shaft according to claim 1 , wherein the adjacent chain links are hinged through pin shafts, and the adjacent pin shafts are axially arranged at an included angle. 3 . 3 . The flexible shaft according to claim 2 , wherein the axial included angle between the adjacent pin shafts is 90°. 4 . 4. The flexible shaft according to claim 1, wherein the sleeve is filled with grease. 5. The flexible shaft of claim 2, wherein the chain link comprises: Connecting rod; a first connecting end fixedly arranged at one end of the connecting rod; The second connecting end is fixedly arranged on the other end of the connecting rod; The first connection end of the chain link and the second connection end of the adjacent chain link are hingedly arranged through a pin shaft to form the spherical structure in sliding abutment with the inner wall of the sleeve. 6 . The flexible shaft according to claim 5 , wherein the connecting rod is connected with the connecting part of the first connecting end and the connecting part of the second connecting end respectively in an arc transition, and the connecting rod is 6 . The outer diameter is smaller than the outer diameter of the first connection end or the second connection end. 7. A braking device, characterized in that, comprising a flexible shaft as described in any one of claims 1-6, further comprising: a joint, which is fixedly arranged at one end of the sleeve, and is used for fixing the sleeve on the vehicle; The pull rod is threaded and slidably arranged in the sleeve, and is connected with one of the chain links at the end, and is used to drive a plurality of the chain links to move along the length of the sleeve. 8. The braking device of claim 7, wherein the braking device further comprises: The sheath is sleeved on the sleeve and fixedly connected with the joint. 9. The braking device of claim 8, wherein the joint comprises: a fixing tube, which is fixedly arranged at one end of the sleeve, and is used for crimping and fixing the sleeve and the sheath for crimping; The threaded connection pipe is fixedly arranged at one end of the fixed pipe, the outer wall of the threaded connection pipe is provided with a locking nut for fixing the sleeve on the vehicle through threads, the tie rod and a plurality of the chain links It is threaded and slidably arranged in the threaded connection pipe. 10. A train, characterized in that it comprises a braking device according to any one of claims 7-9.

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