Flexible shaft, brake device and train

Abstract

The present invention provides a flexible shaft, a braking device and a train, which belongs to the field of vehicle braking technology, and includes a sleeve and a plurality of chain links. The plurality of chain links are connected in sequence and inserted in the sleeve, and the adjacent chain links can be rotatably connected to cooperate with the bending of the sleeve, and the connecting part of the adjacent chain links is a spherical structure that slides with the inner wall of the sleeve. The braking device and the train both adopt the flexible shaft. The flexible shaft provided by the present invention is connected in sequence by a plurality of chain links, which are inserted in the sleeve and can slide along the sleeve. The adjacent chain links are hinged to cooperate with the bending angle adjustment of the sleeve, and the connecting part of the adjacent chain links is a spherical structure. When the plurality of chain links slide along the sleeve through the straight section and the bending section of the sleeve, they can contact the inner wall of the sleeve through the arc surface of the plurality of spherical structures, thereby reducing the friction between the chain links and the sleeve, and there is no need to use a large force to pull the plurality of chain links, which is easier to operate.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle braking, and more specifically, relates to a flexible shaft, a braking device using the flexible shaft, and a train using the flexible shaft. Background Art

[0002] The brake device applies brakes to rail vehicles mechanically. Usually, the brake device is connected to the basic brake device through a flexible shaft. The conventional flexible shaft is a structure of a casing and a wire rope. The wire rope is inserted into the casing, and the force is transmitted through the wire rope. Due to the influence of the installation position of the brake device and the size of the use space, the flexible shaft needs to be bent many times when it is actually used. Since the bending angles of the casing and the wire rope cannot be kept consistent, invalid travel will be generated. At the same time, the wire rope at the bent part will partially rest against the inner wall of the casing, increasing the friction of the wire rope when it moves in the casing. When the flexible hose is bent many times, it needs to overcome more friction and provide a larger pulling force when completing the force transmission, which makes it difficult to operate. Summary of the invention

[0003] The purpose of the present invention is to provide a flexible shaft, aiming to solve the problem that after the flexible shaft is bent multiple times, invalid stroke will be generated, a large pulling force is required, and the operation is difficult.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a flexible shaft, comprising:

[0005] casing;

[0006] A plurality of chain links, wherein the plurality of chain links are hinged in sequence and inserted into the sleeve, and the connecting parts where adjacent chain links are hinged to each other are spherical structures;

[0007] The plurality of chain links can be slidably abutted against the inner wall of the sleeve through the spherical structure and are used to cooperate with the bending of the sleeve.

[0008] Furthermore, adjacent chain links are hinged via pins, and adjacent pins are axially arranged at an angle.

[0009] Furthermore, the axial angle between adjacent pin shafts is 90°.

[0010] Furthermore, the sleeve is filled with grease.

[0011] Furthermore, the chain link comprises:

[0012] Connecting rod;

[0013] A first connecting end, fixedly disposed at one end of the connecting rod;

[0014] A second connecting end, fixedly disposed at the other end of the connecting rod;

[0015] The first connecting end of the chain link and the second connecting end of the adjacent chain link are hingedly connected via a pin shaft to form the spherical structure that is in sliding abutment with the inner wall of the sleeve.

[0016] Furthermore, the connecting rod is connected to the connecting portion of the first connecting end and the connecting portion of the second connecting end respectively by arc transition, and the outer diameter of the connecting rod is smaller than the outer diameter of the first connecting end or the second connecting end.

[0017] The beneficial effect of a flexible shaft provided by the present invention is that: compared with the prior art, the flexible shaft of the present invention is connected in sequence by multiple chain links, which are inserted into a sleeve and can slide along the sleeve. Adjacent chain links are hinged to adjust the bending angle of the sleeve. At the same time, the connecting parts of adjacent chain links are spherical structures. When multiple chain links slide along the sleeve through the straight section and the bent section of the sleeve, they can contact the inner wall of the sleeve through the arc surfaces of the multiple spherical structures, thereby reducing the friction between the chain links and the sleeve. There is no need to use a large force to pull multiple chain links, and the operation is simpler.

[0018] The present invention also provides a braking device, comprising the above-mentioned flexible shaft, and further comprising:

[0019] A connector, fixedly disposed at one end of the sleeve, and used to fix the sleeve on the vehicle;

[0020] The pull rod is inserted into and slidably arranged in the sleeve, and is connected with one of the chain links at the end, and is used for driving the plurality of chain links to move along the length direction of the sleeve.

[0021] The beneficial effect of a 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 a joint, and multiple chain links are connected in sequence and inserted into the sleeve. The multiple chain links can slide along the sleeve through a pull rod, and adjacent chain links are hinged to cooperate with the bending angle adjustment of the sleeve. At the same time, the connecting parts of adjacent chain links are spherical structures. When multiple chain links slide along the sleeve through the straight section and the bent section of the sleeve, they can contact the inner wall of the sleeve through the arc surface of the multiple spherical structures, thereby reducing the friction between the chain links and the sleeve. There is no need to use a large force to pull multiple chain links, and the operation is easier.

[0022] Furthermore, the braking device further comprises:

[0023] The sheath is sleeved on the sleeve and fixedly connected to the joint.

[0024] Furthermore, the connector comprises:

[0025] A fixing tube, fixedly arranged at one end of the sleeve, and used for crimping and fixing the sleeve and the sheath;

[0026] A threaded connecting tube is fixedly arranged at one end of the fixing tube, and a locking nut for fixing the sleeve on the vehicle is threadedly arranged on the outer wall of the threaded connecting tube, and the pull rod and the plurality of chain links are penetrated and slidably arranged in the threaded connecting tube.

[0027] The present invention also provides a train, comprising the above-mentioned flexible axle.

[0028] The beneficial effect of a train provided by the present invention is that: compared with the prior art, the present invention adopts the braking device, which is connected by multiple chain links in sequence, inserted in the sleeve, and can slide along the sleeve. The adjacent chain links are hinged to adjust the bending angle of the sleeve. At the same time, the connecting parts of the adjacent chain links are spherical structures. When the multiple chain links slide along the sleeve through the straight section and the bent section of the sleeve, they can contact the inner wall of the sleeve through the arc surfaces of the multiple spherical structures, thereby reducing the friction between the chain links and the sleeve. There is no need to use a large force to pull the multiple chain links, and the operation is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a braking device provided by an embodiment of the present invention;

[0031] Figure 2 A cross-sectional view of a braking device provided by an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the structure of a flexible shaft provided by an embodiment of the present invention;

[0033] Figure 4 A schematic structural diagram of a chain link of a flexible shaft provided by an embodiment of the present invention;

[0034] Figure 5 A schematic structural diagram of a pin shaft of a flexible shaft provided in an embodiment of the present invention;

[0035] Figure 6 A cross-sectional view of a flexible shaft provided by an embodiment of the present invention;

[0036] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0037] In the figure: 1. sleeve; 2. chain link; 201. connecting rod; 202. first connecting end; 203. second connecting end; 3. pin; 4. joint; 5. pull rod; 6. sheath; 401. fixing tube; 402. threaded connecting tube; 403. locking nut; 7. oil filling hole; 8. sealing bolt; 9. elastic rope; 10. connecting ring. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] Now, a flexible shaft provided by the present invention is described. Figures 1 to 3 , a flexible shaft comprises a sleeve 1 and a chain link 2.

[0040] The multiple chain links 2 are hinged in sequence and inserted into the sleeve 1. The connecting parts where adjacent chain links 2 are hinged to each other are spherical structures. The multiple chain links 2 can slidably abut against the inner wall of the sleeve 1 through the spherical structure and are used to cooperate with the bending of the sleeve 1.

[0041] The sleeve 1 is a steel pipe or a metal hose. When the sleeve 1 is a steel pipe, it needs to be bent according to the installation space inside the vehicle. The inner diameter of the sleeve 1 should be slightly larger than the outer diameter of the spherical structure of the link 2 to avoid local deformation of the inner cavity after the sleeve 1 is rigidly bent, which affects the movement of the link 2. When the sleeve 1 is a metal hose, the metal hose can be a corrugated tube or a mesh tube, and it is necessary to wrap the outer side of the metal hose with a sheath 6, which is a rubber sleeve for protecting the metal hose. Multiple links 2 can rotate to form a connecting strip that can rotate freely in multiple directions. The spherical structure of the connecting part of adjacent links 2 cooperates with the inside of the sleeve 1 to reduce the friction between the link 2 and the sleeve 1.

[0042] Compared with the prior art, the flexible shaft provided by the present invention is composed of multiple chain links 2 connected in sequence, which are inserted into a sleeve 1 and can slide along the sleeve 1. Adjacent chain links 2 are hinged to cooperate with the bending angle adjustment of the sleeve 1. At the same time, the connecting parts of adjacent chain links 2 are spherical structures. When the multiple chain links 2 slide along the sleeve 1 through the straight section and the bent section of the sleeve 1, they can contact the inner wall of the sleeve 1 through the arc surfaces of the multiple spherical structures, thereby reducing the friction between the chain links 2 and the sleeve 1. There is no need to use a large force to pull the multiple chain links 2, and the operation is simpler.

[0043] As a specific implementation of the present invention, please refer to Figures 3 to 5, adjacent links 2 are hinged by pins 3, and adjacent pins 3 are arranged at an angle in the axial direction. In this embodiment, two pins 3 of adjacent links 2 are arranged at an angle to realize the rotation of adjacent links 2 at different angles, and multiple pins 3 of multiple links 2 are arranged at an angle to realize the bending of the entire link 2 in all directions, which can well cooperate with the bending of the sleeve 1 and avoid the jamming of the link 2.

[0044] As a specific implementation of the present invention, please refer to Figures 3 to 5 , the axial angle between adjacent pins 3 is 90°. In this embodiment, the axial angle of 90° between adjacent pins 3 can enable adjacent chain links 2 to bend at various angles in the same plane, and multiple chain links 2 connected in sequence can be bent at various angles in multiple planes, that is, the spatial bending of the two chain links can be achieved.

[0045] As a specific implementation of the present invention, please refer to Figure 6 and Figure 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 sleeve 1, so that the chain link 2 can move more easily in the sleeve 1. A plurality of threaded oil filling holes 7 are sequentially opened along the length of the sleeve 1 for injecting grease into the sleeve 1. A blocking bolt 8 is installed on the oil filling hole 7. The blocking bolt 8 is rotatably installed in the oil filling hole 7 through a thread to block the sleeve 1 to prevent the grease from flowing out. In addition, a connecting ring 10 is provided at the end of the blocking bolt 8. The connecting ring 10 is rotatably installed on the blocking bolt 8 through a connecting shaft. The connecting shaft is installed on the blocking bolt 8 through a threaded hole. A connecting ring 10 is also rotatably installed on one side of the oil filling hole 7 through a connecting shaft, corresponding to the number of the oil filling holes 7. The corresponding two connecting rings 10 are connected by an elastic rope 9. When the oil filling hole 7 needs to be used to inject grease, the blocking bolt 8 is unscrewed from the threaded oil filling hole 7. The elastic rope 9 is always connected to the blocking bolt 8 to prevent the blocking bolt 8 from falling off and accidentally lost.

[0046] As a specific implementation of the present invention, please refer to Figures 3 to 5 The chain link 2 includes a connecting rod 201 , a first connecting end 202 and a second connecting end 203 .

[0047] 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 link 2 and the second connecting end 203 of the adjacent link 2 are hingedly arranged through the pin shaft 3 to form a spherical structure that slides with the inner wall of the sleeve 1. In this embodiment, the first connecting end 202 is a spherical structure with a groove at the end, and a through hole is provided through the first connecting end 202. The central axis of the through hole passes through the center of the spherical structure and is perpendicular to the side wall of the groove; the second connecting end 203 is a disc structure with an arc-shaped side wall, which can be inserted into the groove of the first connecting end 202 to form a complete spherical structure. Similarly, a through hole is provided through the end face of the second connecting end 203. The through hole has the same diameter as the through hole of the first connecting end 202, and the through hole is perpendicular to the end face of the disc structure. When the second connecting end 203 is inserted into the adjacent first connecting end 202, the two through holes match, and a pin 3 is used to pass through the two through holes to complete the fixation of the adjacent chain links 2. At the same time, the connecting part is ensured to be a spherical structure.

[0048] As a specific implementation of the present invention, please refer to Figure 3 and Figure 4 The connecting rod 201 is connected to the connecting portion of the first connecting end 202 and the connecting portion of the second connecting end 203 by arc transition, respectively, and the outer diameter of the connecting rod 201 is smaller than the outer diameter of the first connecting end 202 or the second connecting 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 to the arc surfaces of the first connecting end 202 and the second connecting end 203 by arc transition. The outer diameter of the connecting rod 201 is smaller than the outer diameter of the ball structures at the two ends, so that the ball structures can always contact the inner wall of the sleeve 1, ensuring that the two chain links move more smoothly.

[0049] The present invention also provides a braking device, please refer to Figure 1 and Figure 2 , a braking device adopts the above-mentioned flexible shaft and also includes a joint 4 and a pull rod 5.

[0050] The joint 4 is fixedly arranged at one end of the sleeve 1 for fixing the sleeve 1 on the vehicle; the pull rod 5 is slidably arranged in the sleeve 1 and connected to a chain link 2 at the end to drive multiple chain links 2 to move along the length direction of the sleeve 1.

[0051] The joint 4 can be fixed at a position such as a vehicle bracket or a bottom plate. When the pull rod 5 is pulled, the fixed part is a force-bearing support point to keep the sleeve 1 stable, thereby achieving movement along the sleeve 1 under the action of the pulling force of the pull rod 5. A stopper is provided at the end of the pull rod 5, and the outer diameter of the stopper 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 sleeve 1 and being difficult to remove.

[0052] 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 to the vehicle through a joint 4, and multiple links 2 are connected in sequence and inserted into the sleeve 1. The multiple links 2 can slide along the sleeve 1 through a pull rod 5. Adjacent links 2 are hinged to cooperate with the bending angle adjustment of the sleeve 1. At the same time, the connecting parts of adjacent links 2 are spherical structures. When multiple links 2 slide along the sleeve 1 through the straight section and the bent section of the sleeve 1, they can contact the inner wall of the sleeve 1 through the arc surface of the multiple spherical structures, thereby reducing the friction between the links 2 and the sleeve 1. There is no need to use a large force to pull multiple links 2, and the operation is simpler.

[0053] As a specific implementation of the present invention, please refer to Figure 1 and Figure 2 , a braking device also includes a sheath 6.

[0054] The sheath 6 is sleeved on the sleeve 1 and fixedly connected to the joint 4. In this embodiment, the sheath 6 is a rubber sleeve, which is sleeved outside the sleeve 1 to protect the metal hose.

[0055] As a specific implementation of the present invention, please refer to Figure 1 and Figure 2 The joint 4 includes a fixed pipe 401 and a threaded connection pipe 402 .

[0056] A fixing tube 401 is fixedly arranged at one end of the sleeve 1, and is used for crimping the fixing sleeve 1 and the sleeve 6; a threaded connecting tube 402 is fixedly arranged at one end of the fixing tube 401, and a locking nut 403 for fixing the sleeve 1 on the vehicle is threadedly arranged on the outer wall of the threaded connecting tube 402, and a pull rod 5 and a plurality of chain links 2 are passed through and slidably arranged in the threaded connecting tube 402. In this embodiment, the fixed tube 401 and the threaded connecting tube 402 are integrally formed, the inner diameters of the sleeve 1 and the threaded connecting tube 402 are the same, the two chain links can also move along the inner diameter of the threaded connecting tube 402, the sleeve 6 is sleeved on the outside of the sleeve 1, and the end is crimped into the fixed tube 401 by a crimping machine or a crimping pliers, so that the sleeve 1 and the sleeve 6 are fixed in the fixed tube 401, and a locking nut 403 is threadedly installed on the outer wall of the threaded connecting tube 402. The locking thread includes at least two nuts, and adjacent nuts can clamp the bracket on the vehicle, so that the threaded connecting tube 402 is fixed to the vehicle, that is, the sleeve 1 is fixed to the vehicle. There can be one fixed nut among the adjacent nuts, and the rest are rotatable nuts on the outer wall of the threaded connecting tube 402, or they can all be rotatable nuts, and the spacing between adjacent nuts can be adjusted according to different connecting parts of the vehicle.

[0057] The present invention also provides a train that adopts the above-mentioned flexible shaft. Compared with the prior art, since the train adopts the braking device, a plurality of chain links 2 are connected in sequence and are inserted into the sleeve 1, and can slide along the sleeve 1. Adjacent chain links 2 are hinged to cooperate with the bending angle adjustment of the sleeve 1. At the same time, the connecting parts of adjacent chain links 2 are spherical structures. When the plurality of chain links 2 slide along the sleeve 1 through the straight section and the bent section of the sleeve 1, they can contact the inner wall of the sleeve 1 through the arc surfaces of the plurality of spherical structures, thereby reducing the friction between the chain links 2 and the sleeve 1. There is no need to use a large force to pull the plurality of chain links 2, and the operation is easier.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible shaft, characterized in that: include: casing; A plurality of chain links, wherein the plurality of chain links are hinged in sequence and inserted into the sleeve, and the connecting parts where adjacent chain links are hinged to each other are spherical structures; The plurality of chain links can be slidably abutted against the inner wall of the sleeve through the spherical structure, and are used to cooperate with the bending of the sleeve; The adjacent chain links are hinged by pins, and the adjacent pins are arranged at an angle in the axial direction; The chain links include: Connecting rod; A first connecting end, fixedly disposed at one end of the connecting rod; A second connecting end, fixedly disposed at the other end of the connecting rod; The first connecting end of the chain link and the second connecting end of the adjacent chain link are hingedly arranged by a pin shaft to form the spherical structure that is slidably abutted against the inner wall of the sleeve. The first connecting end is a spherical structure with a groove at the end, and a through hole is provided through the first connecting end. The central axis of the through hole passes through the center of the spherical structure and is perpendicular to the side wall of the groove. The second connecting end is a disc structure with an arc-shaped side wall, which can be inserted into the groove of the first connecting end to form a complete spherical structure. Similarly, a through hole is provided through the end face of the second connecting end. The through hole has the same diameter as the through hole of the first connecting end, and the through hole is perpendicular to the end face of the disc structure. The connecting rod is connected to the connecting portion of the first connecting end and the connecting portion of the second connecting end respectively by arc transition, and the outer diameter of the connecting rod is smaller than the outer diameter of the first connecting end or the second connecting end.

2. A flexible shaft as claimed in claim 1, characterized in that: The axial angle between adjacent pin shafts is 90°.

3. A flexible shaft as claimed in claim 1, characterized in that: The sleeve is filled with lubricating grease.

4. A braking device, characterized in that: A flexible shaft according to any one of claims 1 to 3, further comprising: A connector, fixedly disposed at one end of the sleeve, and used to fix the sleeve on the vehicle; The pull rod is inserted into and slidably arranged in the sleeve, and is connected with one of the chain links at the end, and is used for driving the plurality of chain links to move along the length direction of the sleeve.

5. The braking device according to claim 4, characterized in that: The braking device also includes: The sheath is sleeved on the sleeve and fixedly connected to the joint.

6. The braking device according to claim 5, characterized in that: The connector comprises: A fixing tube, fixedly arranged at one end of the sleeve, and used for crimping and fixing the sleeve and the sheath; A threaded connecting tube is fixedly arranged at one end of the fixing tube, and a locking nut for fixing the sleeve on the vehicle is threadedly arranged on the outer wall of the threaded connecting tube, and the pull rod and the plurality of chain links are penetrated and slidably arranged in the threaded connecting tube.

7. A train, characterized in that A braking device comprising any one of claims 4 to 6.

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