A control cable device for a railway freight car release valve

Abstract

This utility model relates to a control cable device for a release valve of a railway freight car, including a control mechanism and a cable mechanism. The control mechanism includes a control handle, a handle connection assembly, a control housing assembly, and a rope pulley assembly. This utility model is installed on the underframe of a railway freight car. Utilizing the flexible and sealed design of the cable device's sheath and control wire rope, the position between the control and the release valve connection terminal can be arbitrarily arranged according to the car body structure without limitations. Because this utility model incorporates a clutch between the handle and the rope pulley inside the control, and the spring inside the control and the return spring of the cable device achieve initial tension balance using the control wire rope, the release valve connection terminal automatically returns to its original position after being pulled left or right. Therefore, railway freight cars equipped with this utility model do not experience jamming issues with the two control devices installed.

Description

Technical Field

[0001] This utility model relates to the field of control cable technology, and in particular to a control cable device for a railway freight car release valve. Background Technology

[0002] The release valve is a component in the braking system of railway freight cars, typically installed in the lower middle part of the car's underframe. When the car needs to release, the operator pulls the release valve lever located in the middle of the side beam, which moves the release valve handle to release the air brake system. The main problem is that the release valve lever, made of bent round steel, is directly connected to the release valve handle, making it impossible to position the lever in the most convenient location for the operator. This is particularly difficult with the structurally unique railway vehicles where a straight-lever release valve lever is installed. Furthermore, the release valve lever in railway freight cars is generally located in the middle of the side beam, with the end rings of the levers on both sides of the car body connected to the end of the release valve handle by a pin. When one side's release valve lever is pulled, the other side's lever moves simultaneously. This interdependent operation at both ends, coupled with the fact that general cable-operated systems can only be pulled and cannot passively follow the movement, limits their application in the release valve operating mechanism of railway freight cars.

[0003] Therefore, there is an urgent need for a control cable device for the relief valve of railway freight cars. Utility Model Content

[0004] This utility model provides a control cable device for a relief valve on railway freight cars. It optimizes the arrangement of the relief valve lever on railway freight cars, solves the problem of arranging the relief valve lever in special vehicles, and reduces the current problems of the relief valve lever being prone to jamming and not resetting, so as to meet the requirements of railway freight car technology improvement and the reliability of train operation.

[0005] This utility model provides a control cable device for a railway freight car release valve, including a control mechanism and a cable mechanism. The control mechanism includes a control handle, a handle connection assembly, a control housing assembly, and a rope pulley assembly. The control housing assembly has the tail end of the handle connection assembly and the rope pulley assembly arranged sequentially from left to right. The handle connection assembly includes a front cover bearing body, a handle shaft, a sliding clutch, a clutch spring, and a handle shaft torsion spring connected in sequence. The front cover bearing body is connected to the control handle so that the control handle can be rotatably mounted on the control housing assembly.

[0006] The rope pulley assembly includes a rope pulley body and a spring spring component. A steel wire rope is wound on the rope pulley body. The steel wire rope is connected to one end of the cable mechanism. The other end of the cable mechanism is connected to a release valve. The steel wire rope is connected to the cable mechanism. The spring spring component is rotatably disposed in the inner cavity on the right side of the rope pulley body.

[0007] When the control handle is turned, the rope pulley and the sliding clutch engage to connect, and at the same time, the cable mechanism moves away from the relief valve to open the relief valve; when the control handle is released, the cable mechanism moves towards the relief valve to close the relief valve, and the sliding clutch disengages from the rope pulley.

[0008] Preferably, the control cable device for the railway freight car relief valve includes a front cover, an annular housing portion, and a rear cover portion. The control handle is provided on the front cover, and the rope wheel assembly is disposed inside the annular housing portion. The front cover, the annular housing portion, and the rear cover portion are connected in sequence.

[0009] Preferably, the control cable device for the railway freight car relief valve has a central circular hole at the center of the front cover and multiple connecting circular holes around the front cover. The connecting circular holes are used to pass through rivets to connect with the front cover and the rear cover.

[0010] The outer circle of the front cover bearing body is a stepped cylindrical structure. The first cylinder at the front end of the stepped cylindrical structure is fixed by welding at the central circular hole. The inner circle of the front cover bearing body is a multi-step through-body structure. The multi-step through-body structure includes a dustproof sealing ring, a front cover bearing, and a mounting point for the handle shaft torsion spring arranged in sequence. The inner end face of the front cover bearing body is provided with symmetrical triangular grooves and narrow slots. The triangular grooves are used to mate with the end face of the sliding clutch.

[0011] The handle shaft includes a square shaft, a first cylinder, a third cylinder, a second cylinder, and a flat round connector connected from left to right. The square shaft has a through hole for the handle pin to pass through. The first cylinder passes through the front cover bearing body and the central hole to connect the square shaft to the operating handle. The third cylinder has an axial groove. The first cylinder is fitted with a dustproof sealing ring and cooperates with the front cover bearing. The second cylinder is fitted with a handle torsion spring, which is respectively locked in the axial groove and the narrow groove. The flat round connector is connected to the sliding clutch. The right inner end face of the flat round connector has a cylindrical blind hole, and a rope pulley assembly is installed in the cylindrical blind hole.

[0012] The sliding clutch includes a cylindrical body with a left inner hole. The flat round connector passes through the left inner hole and then through the inner hole of the handle shaft bearing, and can slide axially. The outer circle of the handle shaft bearing is supported in the clutch inner hole of the rope wheel assembly. The bottom of the cylindrical body has the right inner hole to realize the cylindrical structure at the bottom of the cylindrical body. The cylindrical structure is used to install the clutch spring. The bottom edge of the cylindrical body is provided with multiple triangular teeth, which are engaged with the rope wheel assembly. The cylindrical body is provided with a triangular cam, which cooperates with the triangular groove.

[0013] Preferably, the annular housing portion of the railway freight car's release valve control cable device includes an annular box, a mounting plate, a sheath tube connector mounting seat, a front cover mounting surface, and a rear cover mounting surface. The interior of the annular box is cylindrical, used to house the rope pulley assembly. The mounting plate has multiple mounting holes for mounting and fixing the control device to the vehicle body. The sheath tube connector mounting seat connects and fixes the annular housing portion and the cable mechanism. The sheath tube connector mounting seat has an inner hole for operating the cable mechanism. The steel wire rope of the structure passes through and is wound on the rope pulley assembly. The front cover mounting surface and the rear cover mounting surface are provided with multiple connecting through holes. The front end cover and the rear cover are respectively mounted on the front cover mounting surface and the rear cover mounting surface through the connecting through holes. The front cover mounting surface and the rear cover mounting surface are respectively provided with annular grooves. A second O-ring seal is placed in the annular groove. The front cover mounting surface and the rear cover mounting surface are provided with through holes. The through holes are used to drive in a pin after the cable mechanism is inserted into the inner hole to fix the cable mechanism axially.

[0014] The aforementioned operating cable device for the railway freight car release valve, preferably, includes a rear cover comprising a rear cover body, a rear cover bearing, a ratchet pawl, a ratchet torsion spring, a bearing clip, and an adjustment hole clip. The rear cover body has a frustum in the middle, an annular edge, and a circular hole at its center. The rear cover bearing is installed in this hole. The inner cylinder of the rear cover bearing supports the rope pulley assembly. The outer cylinder and step of the rear cover bearing are used to engage the bearing clip to seal the rear cover bearing. Multiple circular holes are provided on the edge of the rear cover body, through which rivets 13 pass to connect it to the annular housing and the front cover. A ratchet shaft mounting hole is provided on the frustum, and a ratchet shaft is welded to the mounting hole. The ratchet torsion spring and the ratchet pawl are sequentially fitted onto the ratchet shaft, and the ratchet torsion spring and ratchet pawl are axially fixed by a cotter pin. An adjustment hole is provided on the frustum for adjusting the position of the ratchet pawl during final assembly.

[0015] The aforementioned operating cable device for the railway freight car release valve, preferably, includes a spring component comprising a sheave shaft, a spring, a front nylon bearing, a rear nylon bearing, a sheave cover, and a ratchet. The sheave body is a hollow disc shape with threaded holes. The sheave cover is fixed to the sheave body by bolts through the threaded holes. An annular groove is provided on the outer cylindrical surface of the sheave body, and the steel wire rope is wound and fixed on the annular groove. A bottom circular surface is integrally formed on the left side of the sheave body, with multiple weight-reducing holes on the bottom circular surface. A shaft through hole is provided at the center of the bottom circular surface. The shaft through hole and the front nylon bearing of the sheave body are rotatably engaged and axially positioned. A clutch gear is integrally formed concentrically on the outer side of the shaft through hole, and the clutch gear engages with the triangular teeth. The right side of the sheave body is open for installing the sheave cover. The inner cavity of the sheave body is a divided cylindrical space for placing the spring. A first hook-shaped through hole is provided on the inner wall of the sheave body for installing the outer end of the spring.

[0016] Preferably, in the aforementioned railway freight car relief valve control cable device, the outer circumference of the ratchet is provided with multiple ratchet teeth, which cooperate with the ratchet pawl to enable the ratchet to rotate only in one direction. The inner hole of the ratchet is a flat round through hole, which is used to fit onto the fourth cylinder to fix the ratchet and the rope wheel axis circumferentially.

[0017] The aforementioned operating cable device for the railway freight car relief valve, preferably, includes a cable mechanism comprising a first protective tube joint, a protective sleeve, a second protective tube joint structure, a return spring, and a relief valve connection terminal connected in sequence. The left outer circumference of the first protective tube joint is provided with a positioning groove and an O-ring installation groove. A first O-ring is provided in the O-ring installation groove. After the first protective tube joint is inserted into the inner hole, a pin is driven in after the through hole is aligned with the positioning groove to achieve axial fixation of the first protective tube joint. The inner cylinder of the first protective tube joint is used to pass through the wire rope. The wire rope is connected to the relief valve connection terminal in sequence through the protective sleeve, the second protective tube joint structure, and the return structure. The outside of the return spring is provided with a corrugated sheath.

[0018] Preferably, the second protective tube joint structure of the railway freight car relief valve control cable device includes a second protective tube joint body, a ball joint nut, a ball joint connector, a locking nut, and a nylon guide sleeve. The outer circle of the second protective tube joint body is threaded for screwing the ball joint nut to adjust its position axially. The left inner cylinder of the second protective tube joint body is connected to the protective sleeve, and the right inner cylinder of the second protective tube joint body is connected to the nylon guide sleeve. The right outer circle step of the second protective tube joint body is used to position the return spring. The outer circle of the ball joint nut is spherical, and the inner circle of the ball joint nut is cylindrical. The device is threaded, and the thread engages with the outer thread of the second protective tube connector to adjust the relative axial position. The ball joint connector has mounting through holes at both ends, and a semi-spherical annular hole at the center of the ball joint connector for engaging the outer spherical notch of the ball joint nut. The ball joint connector clamps the ball joint nut, allowing the ball joint connector and the ball joint nut to rotate in all directions. When the wire rope pulls the relief valve connection terminal, the fixed ball joint connector and the moving relief valve connection terminal are displaced, causing the axial direction of the wire rope to change, thus preventing the wire rope from getting stuck due to lateral force.

[0019] The aforementioned operating cable device for the railway freight car relief valve, preferably, includes a relief valve connection terminal comprising a body, a stepped cylinder, a second step on the left, a third step on the left, and a hollow disc. The left side of the body is a stepped cylinder, and the right side of the body is integrally provided with a hollow disc. The stepped cylinder has an inner cylindrical blind hole for inserting the wire rope and connecting it as a whole by a clamping method. The second step on the left is used to position and hold the return spring. The third step is fitted with a corrugated tube sheath. The hollow disc is used to connect the handle of the relief valve. During installation, a round pin is passed through the handle of the relief valve and the central through hole of the hollow disc, respectively, so that the relief valve connection terminal and the handle of the relief valve are hinged together. By operating the wire rope to pull the relief valve connection terminal, the handle of the relief valve is rotated, thereby making the relief valve work.

[0020] Beneficial effects:

[0021] This utility model employs a design that balances the internal forces of the steel wire rope with the return spring of the cable device and the spring in the controller. This allows the release valve connection terminal to automatically return to its initial position after being pulled back and forth. In this way, the controllers located at the two positions on the vehicle body can be pulled and operated independently without affecting each other.

[0022] The manipulator of this utility model incorporates a clutch for the rope pulley body, a cam for the sliding sleeve clutch, a handle shaft, and a groove structure on the end face of the front cover bearing. This allows the rope pulley body to separate from the manipulator handle when it is not in operation; and the manipulator handle to be directly connected to the rope pulley body when it is in operation. The advantage of this is that when two manipulators are installed on the same vehicle, the active manipulator does not affect the handle of the other manipulator, and it avoids accidental jamming of the passive manipulator, which would affect the active operation.

[0023] This invention utilizes a ratchet mechanism on the rope wheel shaft inside the actuator and a ratchet pawl device on the rear cover to control the one-way rotation of the rope wheel shaft. By rotating the rope wheel shaft through the hexagonal hole at the rear end of the rope wheel shaft, the spring is tightened. After the torque of the spring and the compression force of the return spring of the cable are balanced by the operating wire rope, the spring does not rotate back, so that the release valve connection terminal always remains in the initial position after being pulled left and right.

[0024] This invention enables the release valve actuators located at any two points on the car body to operate independently without affecting each other and to automatically reset without causing any harmful impact on the reset function of the release valve handle. It has sealing and anti-theft and anti-tampering functions, and has a control cable device for the release valve of railway freight cars that is interchangeable with the release valve lever of existing railway freight cars. Attached Figure Description

[0025] Figure 1 This is a front view schematic diagram of a control cable device for a railway freight car release valve according to this utility model;

[0026] Figure 2 yes Figure 1 A left-view diagram;

[0027] Figure 3 yes Figure 2 Schematic diagram of section AA;

[0028] Figure 4 yes Figure 1 Axonometric schematic diagram;

[0029] Figure 5 This is a front view schematic diagram of the manipulator of this utility model;

[0030] Figure 6 yes Figure 5 A left-view diagram;

[0031] Figure 7 yes Figure 5 Rear view diagram;

[0032] Figure 8 yes Figure 6 Schematic diagrams of the BB section and local sections;

[0033] Figure 9 yes Figure 5 Schematic diagram of the DD section;

[0034] Figure 10 The operating handle of this utility model is rotated to the working position, and after the front and rear covers are removed. Figure 5 A left-view diagram;

[0035] Figure 11 yes Figure 5 Exploded view.

[0036] In the picture:

[0037] 1. Control mechanism; 110. Square hole;

[0038] 2. Cable mechanism; 21. Second protective tube connector body; 22. Relief valve connection terminal; 23. Bellows sheath; 24. First protective tube connector; 25. Steel wire rope; 26. Sheath; 27. Return spring; 210. Ball joint nut; 211. Left inner cylinder; 212. Ball joint connector body; 213. Mounting through hole; 214. Locking nut; 215. Nylon guide sleeve; 221. Stepped cylinder;

[0039] 222. Second step on the left; 223. Third step; 224. Hollow disc; 225. Blind hole in inner cylinder;

[0040] 251. First O-ring seal;

[0041] 3. Front cover; 30. Front cover body; 31. Front cover bearing body; 32. Handle shaft; 33. Slippery clutch; 34. Clutch spring; 35. Handle shaft bearing; 36. Handle shaft torsion spring; 37. Dustproof sealing ring;

[0042] 301. Central circular hole; 303. Connecting circular hole; 311. Triangular groove; 312. Dustproof sealing ring; 313. Narrow groove; 314. Front cover bearing; 315. Mounting point for handle shaft torsion spring; 320. First cylinder; 321. Square shaft; 322. Through hole; 323. Flat round connector; 327. Cylindrical blind hole; 325. Axial groove; 326. Second cylinder; 324. Third cylinder; 330. Left end face; 331. Triangular cam; 332. Left inner hole; 333. Triangular tooth; 334. Right inner hole; 335. Cylindrical body;

[0043] 4. Annular shell section; 40. Shaped box body; 41. Mounting plate; 42. Sheath pipe joint mounting base;

[0044] 401. Front cover mounting surface; 402. Through hole; 403. Rear cover mounting surface; 404. Through hole; 405. Rear cover mounting surface; 410. Mounting hole; 421. Inner hole;

[0045] 5. Sheave assembly; 50. Sheave body; 51. Spring; 52. Sheave shaft;

[0046] 53. Front nylon bearing of the pulley; 54. Rear nylon bearing; 55. Pulley cover; 56. Screw; 57. Ratchet;

[0047] 501. First hook-shaped through hole; 502. Clutch triangular tooth; 504. Annular groove; 505. Threaded hole; 506. Bottom circular surface; 508. Shaft through hole; 509. End face groove; 511. Outer end; 512. Inner end; 520. Second cylinder; 521. Axial hook-shaped through hole; 522. Third cylinder; 523. Fourth cylinder; 524. First cylinder; 525. Fifth cylinder; 526. Hexagonal inner blind hole; 551. Center hole; 552. Round hole; 571. Flat round hole; 572. Ratchet tooth;

[0048] 6. Rear cover; 60. Rear end cover; 61. Ratchet pawl; 62. Ratchet shaft; 63. Ratchet torsion spring; 64. Cotter pin; 65. Rear end cover bearing; 66. Adjustment hole clip;

[0049] 601, round hole; 602, adjusting hole; 603, ratchet shaft mounting hole;

[0050] 11. Operating handle; 12. Handle pin; 13. Rivet; 14. Bearing clip;

[0051] 15. Pin; 16. Second O-ring seal. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0053] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the use of terms such as "first," "second," etc., to define components is merely for the convenience of distinguishing the aforementioned components; unless otherwise stated, these terms have no special meaning and should not be construed as indicating or implying relative importance.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] This utility model provides a control cable device for a railway freight car release valve, comprising a control mechanism and a cable mechanism. The control mechanism includes a control handle, a handle connection assembly, a control housing assembly, and a pulley assembly. The control housing assembly contains, from left to right, the tail end of the handle connection assembly and the pulley assembly. The handle connection assembly includes, in sequence, a front cover bearing, a handle shaft, a slip clutch, a clutch spring, and a handle shaft torsion spring. The front cover bearing is connected to the control handle, allowing the control handle to be rotatably mounted on the control housing assembly. The pulley assembly includes a pulley body and a spring. The component comprises a rope pulley body with a steel wire rope wound around it. One end of the steel wire rope is connected to a cable mechanism, and the other end of the cable mechanism is connected to a release valve. A spring component is rotatably mounted on the right side of the rope pulley body. When the operating handle is rotated, the rope pulley body engages with the sliding clutch, simultaneously moving the cable mechanism away from the release valve to open it. When the operating handle is released, the cable mechanism moves towards the release valve to close it, and the sliding clutch disengages from the rope pulley body. This invention allows release valve operators located at any two points on the car body to operate independently without interfering with each other, automatically resetting without harmfully affecting the reset function of the release valve handle. It has sealing and anti-theft / tampering functions and is an interchangeable control cable device for the release valve of railway freight cars with the release valve lever of existing railway freight cars.

[0056] The following section uses a control cable device for a railway freight car relief valve as an example to illustrate the entire technical process in detail.

[0057] Example 1

[0058] like Figure 1-4As shown, a control cable device for a railway freight car release valve includes a control mechanism 1 and a cable mechanism 2. The control mechanism 1 includes a control handle 11, a handle connection assembly, a control housing assembly, and a rope wheel assembly 5. The control housing assembly has the tail end of the handle connection assembly and the rope wheel assembly 5 arranged sequentially from left to right. The handle connection assembly includes a front cover bearing 31, a handle shaft 32, a sliding clutch 33, a clutch spring 34, and a handle shaft torsion spring 36 connected in sequence. The front cover bearing 31 is connected to the control handle 11 so that the control handle 11 can be rotatably mounted on the control housing assembly.

[0059] In this device, the mounting plate 41 of the control assembly 1 is fixed to the vehicle body with fasteners. Rotating the control handle 11 clockwise can push the sliding clutch 33 to move axially to the right, connecting it to its pulley body 50, causing the pulley body 50 to rotate. The rotating pulley body 50 winds around and pulls the control wire rope 25 inside the cable device. The control wire rope 25 then pulls the handle of the release valve through the clamped connection terminal 22 of the release valve.

[0060] Releasing the control handle 11 causes the spring 51 of the rope pulley assembly 5 of the control unit 1 and the handle torsion spring 36 to reverse and reset the control pulley body 50. Under the action of the return spring 27, the control wire rope 25 returns the release valve connection terminal 22 to its initial position. Finally, the control handle 11 returns to its initial position, the release valve handle resets, and the vehicle braking system release operation is completed. Because the cable device 2 is a flexible long tubular structure, its length and curvature can be determined according to the vehicle model requirements. Therefore, the connection between the control unit 1 and the release valve connection terminal 22 can be flexibly arranged according to actual operational needs, and is not limited to a straight connection.

[0061] The operating handle 11 is made of steel through forging and machining. The operating handle 11 is a cylindrical handle body with a round disc-shaped handle head integrally formed. A square hole 110 is provided in the center of the handle head. The square hole 110 cooperates with the left end square shaft 321 of the handle shaft 32 to transmit the operating torque. In order to prevent the handle 11 from disengaging from the handle shaft 32, a through hole is provided in the transverse direction, through which the handle pin 12 passes and is fixed.

[0062] The rope pulley assembly 5 includes a rope pulley body 50 and a spring component. A steel wire rope is wound on the rope pulley body 50. One end of the steel wire rope is connected to the cable mechanism 2, and the other end of the cable mechanism 2 is connected to the release valve. The spring component is rotatably disposed in the inner cavity on the right side of the rope pulley body 50. When the operating handle 11 is turned, the rope pulley body 50 can engage with the sliding clutch 33 to achieve connection, and at the same time, it drives the cable mechanism 2 to move away from the release valve to open the release valve. After the operating handle 11 is released, the cable mechanism 2 moves towards the release valve to close the release valve, and the sliding clutch 33 disengages from the rope pulley body 50.

[0063] The controller housing assembly includes a front cover 30, an annular housing portion and a rear cover portion 6. The front cover 30 is provided with a control handle 11, and the rope pulley assembly is disposed inside the annular housing portion. The front cover 30, the annular housing portion and the rear cover portion 6 are connected in sequence.

[0064] like Figure 5-11 As shown, a central circular hole 301 is provided at the center of the front cover 30, and a plurality of connecting circular holes 303 are provided around the front cover 30. The connecting circular holes 303 are used to pass through rivets to achieve connection with the rope wheel body 50 and the rear cover 6.

[0065] Among them, the front cover 30 is a thin-walled continuous structure made of steel plate through stamping and stretching forming process, with a central frustum and an edge ring.

[0066] The outer circle of the front cover bearing body 31 is a stepped cylindrical structure. The first cylinder at the front end of the stepped cylindrical structure is fixed by welding at the central circular hole 301. The inner circle of the front cover bearing body 31 is a multi-step through structure. The multi-step through structure includes a dustproof sealing ring 312, a front cover bearing 314 and a mounting point 315 for the handle shaft torsion spring 36 arranged in sequence. The inner end face of the front cover bearing body 31 is provided with symmetrical triangular grooves 311 and narrow grooves 313. The triangular grooves 311 are used to cooperate with the triangular cam 331 on the left end face of the sliding clutch 33. The narrow grooves 313 are used to place the support arm of the handle torsion spring 36.

[0067] The handle shaft 32 includes a square shaft 321, a first cylinder 320, a third cylinder 324, a second cylinder 326, and a flat round connector 323 connected sequentially from left to right. The square shaft 321 has a through hole 322 for the handle pin 12 to pass through. The first cylinder 320 passes sequentially through the front cover bearing body 31 and the central round hole 301 to connect the square shaft 321 to the operating handle 11. The third cylinder 324 has an axial groove 325, and the first cylinder 320 is fitted with a protective sleeve. The dust seal ring 37 is fitted with the front cover bearing 314. The handle torsion spring 36 is fitted on the second cylinder 326 and is respectively locked in the axial groove 325 and the narrow groove 313. It is used to automatically turn the operating handle 11 back to its original position after operation. The flat round connector 323 is connected to the sliding clutch 33. The inner end face of the right side of the flat round connector 323 is provided with a cylindrical blind hole 327. The cylindrical blind hole 327 is used to fit the first cylinder 524 on the left side of the rope wheel shaft 52.

[0068] The handle torsion spring 36 is made of spring steel wire wound and bent.

[0069] The sliding clutch 33 is made of steel through machining. The sliding clutch 33 includes a cylindrical body 335. The cylindrical body 335 is provided with a left inner hole 332. The flat round connector 323 passes through the left inner hole 332 and then through the inner hole of the handle shaft bearing 35, and can slide axially. The outer circle of the handle shaft bearing 35 is supported in the clutch inner hole of the rope wheel body 50. The bottom of the cylindrical body 335 is provided with a right inner hole 334 to realize the cylindrical structure at the bottom of the cylindrical body 335. The cylindrical structure is used to install the clutch spring 34. Multiple triangular teeth 333 are provided on the bottom edge of the cylindrical body 335. The triangular teeth 333 are engaged with the rope wheel assembly. Two protruding triangular cams 331 are provided on the left end face 330 of the cylindrical body 335. When the operating handle 11 is not rotated, the triangular cams 331 cooperate with the triangular grooves 311. When the operation is turned clockwise, the triangular cam 331 slides out from the triangular groove 311 to the right end face of the front cover bearing body 31. At the same time, the sliding clutch 33 moves axially, so that the triangular tooth 333 at the right end of the sliding clutch 33 engages with the clutch triangular tooth 502 of the rope wheel of the rope wheel body 50. Then, the operating handle 11 is turned to directly rotate the rope wheel body 50.

[0070] The handle shaft bearing 35 is made of nylon material.

[0071] The annular housing 4 includes an annular box 40, a mounting plate 41, a sheath tube connector mounting seat 42, a front cover mounting surface 401, and a rear cover mounting surface 405. The interior of the annular box 40 is cylindrical and is used to house the rope pulley assembly 5. The mounting plate 41 has multiple mounting holes 410 for mounting and fixing the actuator 1 to the vehicle body. The sheath tube connector mounting seat 42 is used to connect and fix the annular housing 4 to the cable mechanism 22. The sheath tube connector mounting seat 42 has an inner hole 421 for the wire rope 25 of the cable mechanism 22 to pass through and be wound around the rope pulley. On component 5, the front cover mounting surface 401 and the rear cover mounting surface 405 are provided with multiple connecting through holes 404. The front cover part 3 and the rear cover part 6 are respectively mounted on the front cover mounting surface 401 and the rear cover mounting surface 403 through the connecting through holes 404. The front cover mounting surface 401 and the rear cover mounting surface 405 are respectively provided with annular grooves 403. The second O-ring seal 16 is placed in the annular grooves 403. The front cover mounting surface 401 and the rear cover mounting surface 405 are provided with through holes 402. The through holes 402 are used to drive in pins 15 after the cable mechanism 22 is inserted into the inner hole 421 to fix the cable mechanism 22 axially.

[0072] The rear cover includes a rear cover body 60, a rear cover bearing 65, a ratchet pawl 61, a ratchet torsion spring 63, a cotter pin 64, a bearing clip 14, and an adjustment hole clip 66. The rear cover body 60 has a frustum in the middle, an annular edge, and a circular hole at its center. The rear cover bearing 65 is installed in this hole. The inner cylinder of the rear cover bearing 65 supports the pulley assembly 5. The outer cylinder and step of the rear cover bearing 65 engage the bearing clip 14 to seal the rear cover bearing 65. Multiple circular holes 601 are provided on the edge of the body 60. The circular holes 601 are used to pass through the rivets 13 to connect with the annular housing part 4 and the front end cover part 3. A ratchet shaft mounting hole 603 is provided on the round platform. A ratchet shaft 62 is welded on the ratchet shaft mounting hole 603. A pawl torsion spring 63 and a ratchet pawl 61 are sequentially sleeved on the ratchet shaft 62. The pawl torsion spring 63 and the ratchet pawl 61 are axially fixed by a cotter pin 64. An adjustment hole 602 is provided on the round platform. The adjustment hole 602 is used to adjust the position of the ratchet pawl 61 during the final assembly.

[0073] The spring mechanism includes a pulley shaft 52, a spring 51, a front nylon bearing 53, a rear nylon bearing 54, a pulley cover 55, and a ratchet 57. The pulley body 50 is a hollow disc shape. A groove 509 is provided on the right side of the pulley body 50, within which the pulley cover 55 is placed. A threaded hole 505 is provided on the pulley body 50, and the pulley cover 55 is fixed to the threaded hole 505 by bolts 56. An annular groove 504 is provided on the outer cylindrical surface of the pulley body 50, around which a steel wire rope 25 is wound and fixed. A bottom circular surface 506 is integrally formed on the left side of the pulley body 50, with multiple weight-reducing holes on the bottom circular surface 506. A shaft is located at the center of the bottom circular surface 506. The through hole 508, the shaft through hole 508 and the front nylon bearing 53 of the rope wheel are rotatably engaged and axially positioned. A clutch gear 502 is concentrically and integrally set on the outside of the shaft through hole 508, which is used to cooperate with the sliding clutch 33 of the front cover assembly 3 to form a clutch function, to separate or transmit the torque of the handle shaft 32. The clutch gear 502 is engaged with the triangular teeth 333. The right side of the rope wheel body 50 is open for installing the rope wheel cover 55. The inner cavity of the rope wheel body 50 is a divided cylindrical space for placing the spring 51. The inner cavity wall of the rope wheel body 50 is provided with a first hook-shaped through hole 501, which is used to install the outer end 511 of the spring 51.

[0074] Because the rope wheel body 5 is integrally designed with an annular groove 504 for winding (fixing) the operating wire rope 25, a clutch gear 502, a hook-shaped through hole 501 for internal fixing of the spring spring, and several weight-reducing holes, it has the characteristics of reducing parts, multi-functionality, and reducing its own weight.

[0075] The sheave shaft 52 is made of round steel through machining and is an integral stepped shaft-shaped part. The first cylinder 524 on the left is a support section, which is used to cooperate with the inner hole 324 of the handle shaft, the handle shaft bearing 35, and the front nylon bearing 53 of the sheave, supporting the sheave assembly 5, allowing it to rotate circumferentially and be fixed axially. The second cylinder 520 is the section for winding and fixing the spring 51, and an axial hook-shaped through hole 521 is provided on its cylindrical surface to fix the inner end 512 of the spring. The third cylinder 522 is used to cooperate with the rear nylon bearing 54 of the sheave, supporting the center hole 551 of the sheave cover 55 of the sheave assembly 5, allowing it to rotate axially and be fixed axially. The fourth cylinder 523 is a flat round section, which is used to cooperate with the flat round hole 571 in the center of the ratchet 57, so that the ratchet 57 is circumferentially fixed to the sheave shaft 52. The fifth cylinder 525 is used to cooperate with the inner hole of the nylon bearing of the rear cover assembly 6, supporting the sheave assembly 5. A hexagonal blind hole 526 is provided at the right end of the fifth cylinder 52 for rotating the rope wheel shaft 52 using an internal hex wrench.

[0076] The front and rear nylon bearings 53 and 54 of the sheave are made of nylon material. They are assembled between the sheave shaft 52, the sheave body 50, and the sheave cover 55. They are used for rotational engagement to reduce wear, and at the same time provide axial position fixation. The structure is simple and practical.

[0077] The sheave cover 55 is made of steel plate by stamping. It has a flat disc shape and a through hole 551 in the center for cooperating with the rear nylon bearing 54 to support the sheave 5. Its outer circle mates with the opening on the right side of the sheave body, so that the right side of the sheave body 5 has a supporting function and the internal parts are relatively positioned. Several round holes 552 are provided on the plane of the sheave cover 55 for screws 56 to pass through and fix the sheave cover 55 to the threaded hole 505 of the sheave body 50. Several square and round holes are provided on the plane of the sheave cover 55 to reduce the weight of the sheave cover.

[0078] The outer circle of the ratchet 57 is provided with multiple ratchet teeth 572. The ratchet teeth 572 cooperate with the ratchet pawl 61 so that the ratchet 57 can only rotate in one direction. The inner hole of the ratchet 57 is a flat round through hole 571. The flat round through hole 571 is used to fit on the fourth cylinder 523 so that the ratchet 57 and the rope wheel shaft 52 are circumferentially fixed.

[0079] The cable mechanism 2 includes a first protective tube joint 24, a protective sleeve 26, a second protective tube joint structure, a return spring 27, and a relief valve connection terminal 22 connected in sequence. The left end of the first protective tube joint 24 is provided with a positioning groove and an O-ring installation groove. The O-ring installation groove is provided with a first O-ring 251. After the first protective tube joint 24 is inserted into the inner hole 421, the through hole 402 is aligned with the positioning groove and a pin 15 is driven in to fix the first protective tube joint 24 axially. The inner cylinder of the first protective tube joint 24 is used to pass through the wire rope 25. The wire rope 25 is connected to the relief valve connection terminal 22 in sequence through the protective sleeve 26, the second protective tube joint structure, and the return structure. The outside of the return spring 27 is provided with a corrugated tube protective sleeve 23.

[0080] The second protective tube connector structure includes a second protective tube connector body 21, a ball joint nut 210, a ball joint connector body 212, a locking nut 214, and a nylon guide sleeve 215. The outer circle of the second protective tube connector body 21 is threaded for screwing the ball joint nut 214 to adjust its position axially. The left inner cylinder 211 of the second protective tube connector body 21 is connected to the protective tube 26, and the right inner cylinder of the second protective tube connector body 21 is connected to the nylon guide sleeve 215. The right outer circle step of the second protective tube connector body 21 is used to position the return spring 27. The outer circle of the ball joint nut 214 is spherical, and the inner circle of the ball joint nut 214 is cylindrical and threaded. The outer circular thread of the ball joint connector 21 is engaged with the outer circular thread of the second protective pipe connector 21 to adjust the relative axial position. The two ends of the ball joint connector 212 are provided with mounting through holes 213. The center of the ball joint connector 212 is provided with a semi-circular annular hole for engaging the outer spherical notch of the ball joint nut 214. The ball joint connector 212 clamps the ball joint nut 214, allowing the ball joint connector 212 and the ball joint nut 214 to rotate in all directions. When the wire rope 25 pulls the relief valve connection terminal 22, the fixed ball joint connector 212 and the moving relief valve connection terminal 22 are displaced, causing the axial direction of the wire rope 25 to change, thus preventing the wire rope 25 from getting stuck due to lateral force.

[0081] The relief valve connection terminal 22 includes a body, a stepped cylinder 221, a second step 222 on the left, a third step 223 on the left, and a hollow disc 224. The stepped cylinder 221 is located on the left side of the body, and the hollow disc 224 is integrally formed on the right side of the body. The stepped cylinder 221 has an inner cylindrical blind hole 225, which is used to insert a steel wire rope 25 and connect it to the body by a snap-fit ​​method. The second step 222 on the left is used to position and lock the return spring 27. The third step 223 is fitted with a bellows sheath 23. The hollow disc 224 is used to connect the handle of the relief valve. During installation, a round pin is passed through the handle of the relief valve and the central through hole of the hollow disc 224 respectively, so that the relief valve connection terminal 22 and the handle of the relief valve are hinged together. By manipulating the steel wire rope 25 to pull the relief valve connection terminal 22, the handle of the relief valve is rotated, thereby making the relief valve work.

[0082] During assembly, first assemble and crimp the first protective tube connector 24, the second protective tube connector 21, and the protective sleeve 26 into one piece; assemble and crimp the operating wire rope 25 to the relief valve connection terminal 22 into one piece; pass the other end of the operating wire rope 25 through the corrugated pipe protective sleeve 23, the return spring 27, the second protective tube connector 21, and the first protective tube connector 24 respectively, and tighten the operating wire rope 25 so that the return spring 27 and the corrugated pipe protective sleeve 23 are installed between the second protective tube connector 21 and the relief valve connection terminal 22, and then proceed to the final assembly.

[0083] Example 2

[0084] The method for assembling and debugging the control cable device for a railway freight car release valve in Example 1 includes the following steps:

[0085] S1. The end of the operating wire rope 25, which passes through the first protective tube joint 24, of the operating cable device 2 of the railway freight car relief valve is passed through the inner hole 421 of the protective tube joint mounting seat 42 of the housing 4. The operating wire rope 25 is pulled so that the end of the first protective tube joint 24 is close to the inner hole 421 of the protective tube joint mounting seat 42. Then, the left side of the first protective tube joint 24 is inserted into the inner hole 421 of the mounting seat 42. A pin 15 is driven into the protective tube positioning hole 402 of the housing 4 to fix the first protective tube joint 24 axially to the housing 4, so that it cannot be pulled out.

[0086] S2. Insert the head end of the control wire rope 25 into the outer circular groove 504 of the rope wheel body 50, and wind it more than 2 turns until all the excess part of the control wire rope 25 is wound; install the rope wheel assembly 5 into the middle circular hole of the housing 4.

[0087] S3. Insert the second O-ring 16 into the mounting groove 403 on the side of the housing 4; assemble the front cover assembly 3 and the rear cover assembly 6 on the two sides of the housing 4 respectively, and align the mounting holes 303, 404 and 601 of the three. First, use process bolts instead of rivets 13 to fix the front and rear cover assemblies 3 and 6 to the housing 4.

[0088] S4. Assemble the handle 11 by riveting the handle pin 12 through the through hole 322 of the handle shaft 32.

[0089] S5. Insert an Allen wrench into the hexagonal blind hole 526 on the right end of the rope wheel shaft 32 and rotate the rope wheel shaft 32 counterclockwise. At this time, the rope wheel shaft 32 winds the spring 51. After the rotation reaches a certain torque, the spring 51 drives the rope wheel body 50 to rotate, pulling the operating wire rope 25. The operating wire rope 25 pulls the release valve connection terminal 22 to move, compressing the return spring 27. When the compression of the return spring 27 reaches 50mm (half of the return spring's working stroke), stop. At this time, the release valve connection terminal 22 is in the initial working position.

[0090] S6. Rotate the control handle 11 of the railway freight car release valve control cable device located on the left side of the release valve by 30°. At this time, the teeth 333 of the sliding clutch 33 engage with the teeth of the clutch gear 502. Then rotate the control handle 11. The control handle 11 directly drives the rope wheel body 50 to rotate and pulls the control wire rope 25, thereby causing the release valve connection terminal 22 to move to the left past the initial position. At this time, the release valve connection terminal 22 drives the release valve handle to move until the release valve starts to work.

[0091] S7. After releasing the operating handle 11, the operating handle 11 returns to the vertical position under the action of the return spring 27 and the spring spring 51. Under the combined action of the handle return torsion spring 36 and the clutch spring 34, the sliding clutch 33 disengages from the teeth of the rope wheel clutch gear 502, and the cam 332 of the sliding clutch 33 returns to the triangular groove 311 on the end face of the front cover bearing 31.

[0092] S8. Pull the release valve connection terminal 22 of the railway freight car release valve control cable device to the right. At this time, the return spring 27 extends, the control wire rope 25 drives the rope wheel 50 to rotate counterclockwise, and the spring 51 is tightened at the same time (the control handle does not move because the slip clutch is in the disengaged state). Release the release valve connection terminal 22. Under the action of the torque of the spring 51, the rope wheel 51 is driven to rotate clockwise and the control wire rope 25 is pulled back until it is balanced with the force of the return spring 27. The release valve connection terminal 22 returns to the initial position.

[0093] S9. After the operation test is passed, replace the process bolts with rivets 13 for fastening to prevent loosening and arbitrary disassembly.

[0094] S10, bearing clip 14 for press-fitted rear cover bearing 65, and adjustment hole clip 66 for press-fitted rear cover adjustment hole 602.

[0095] Example 3

[0096] The installation method of the control cable device for the release valve of a railway freight car in Example 1 includes the following steps:

[0097] S1. Align the hole 410 of the housing mounting plate 41 with the mounting hole on the vehicle body, then insert the bolt and tighten it to secure it.

[0098] S2. Arrange and fix the cable sheath tube 26 according to the design of the vehicle.

[0099] S3. Connect the relief valve connection terminal 22 to the relief valve handle using a pin.

[0100] S4. Adjust the position of the ball joint connector 212 of the second protective pipe connector 21 and install it on the mounting base fixed on the vehicle body, and fix it with bolts.

[0101] S5. Two sets of this utility model can be installed on opposite sides of the relief valve handle to facilitate operation of the relief valve from two different positions. At this time, under the balancing force of the return spring 27 and the spring spring 51, the relief valve connection terminal 22 can be reliably reset from the initial position by left and right operation without adding external force to the relief valve handle, thus preventing the relief valve from jamming.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A control cable device for a railway freight car release valve, characterized in that, The device includes a control mechanism (1) and a cable mechanism (2). The control mechanism (1) includes a control handle (11), a handle connection assembly, a control housing assembly, and a rope wheel assembly (5). The control housing assembly is provided with the tail of the handle connection assembly and the rope wheel assembly (5) from left to right. The handle connection assembly includes a front cover bearing body (31), a handle shaft (32), a sliding clutch (33), a clutch spring (34), and a handle shaft torsion spring (36) connected in sequence. The front cover bearing body (31) is connected to the control handle (11) so that the control handle (11) can be rotatably mounted on the control housing assembly. The rope pulley assembly (5) includes a rope pulley body (50) and a spring spring component. A steel wire rope is wound on the rope pulley body (50). The steel wire rope is connected to one end of the cable mechanism (2). The other end of the cable mechanism (2) is connected to a release valve. The steel wire rope is connected to the cable mechanism (2). The spring spring component is rotatably disposed in the inner cavity on the right side of the rope pulley body (50). When the operating handle (11) is turned, the rope wheel (50) and the sliding clutch (33) can engage to achieve connection, and at the same time drive the cable mechanism (2) to move away from the relief valve to open the relief valve; after the operating handle (11) is released, the cable mechanism (2) moves towards the relief valve to close the relief valve, and the sliding clutch (33) disengages from the rope wheel (50).

2. The control cable device for the release valve of a railway freight car according to claim 1, characterized in that, The manipulator housing assembly includes a front cover (30), an annular housing portion (4), and a rear cover portion (6). The manipulator handle (11) is provided on the front cover (30), and the rope wheel assembly (5) is disposed inside the annular housing portion (4). The front cover (30), the annular housing portion, and the rear cover portion (6) are connected in sequence.

3. The control cable device for the release valve of a railway freight car according to claim 2, characterized in that, The front cover (30) has a central circular hole (301) at its center and a plurality of connecting circular holes (303) around its perimeter. The connecting circular holes (303) are used to pass through rivets to connect with the front cover (30) and the rear cover (6). The outer circle of the front cover bearing body (31) is a stepped cylindrical structure. The first cylinder at the front end of the stepped cylindrical structure is fixed by welding at the central circular hole (301). The inner circle of the front cover bearing body (31) is a multi-step through structure. The multi-step through structure includes a dustproof sealing ring (312), a front cover bearing (314), and a handle shaft torsion spring mounting point (315) arranged in sequence. The inner end face of the front cover bearing body (31) is provided with symmetrical triangular grooves (311) and narrow grooves (313). The triangular grooves (311) are used to cooperate with the end face of the sliding clutch (33). The handle shaft (32) includes a square shaft (321), a first cylinder (320), a second cylinder (326), a third cylinder (324), and a flat round connector (323) connected sequentially from left to right. The square shaft (321) has a through hole (322) for the handle pin (12) to pass through. The first cylinder (320) passes sequentially through the front cover bearing body (31) and the central round hole (301) to connect the square shaft (321) to the operating handle (11). The third cylinder (324) has an axial groove. 325), the first cylinder (320) is fitted with a dustproof sealing ring (37) and cooperates with the front cover bearing (314), the second cylinder (326) is fitted with the handle torsion spring (36), and the handle torsion spring (36) is respectively locked in the axial groove (325) and the narrow groove (313), the flat round connector (323) is connected to the sliding clutch (33), the right inner end face of the flat round connector (323) is provided with a cylindrical blind hole (327), and the rope wheel assembly (5) is installed in the cylindrical blind hole (327); The sliding clutch (33) includes a cylindrical body (335), on which a left inner hole (332) is provided. The flat round connector (323) passes through the left inner hole (332) and through the inner hole of the handle shaft bearing (35), and can slide axially. The outer circle of the handle shaft bearing (35) is supported in the clutch inner hole of the rope wheel body (50). The bottom of the cylindrical body (335) is provided with the right inner hole (334) to realize the cylindrical structure at the bottom of the cylindrical body (335). The cylindrical structure is used to install the clutch spring (34). The bottom edge of the cylindrical body (335) is provided with a plurality of triangular teeth (333). The triangular teeth (333) are engaged with the rope wheel assembly. The cylindrical body (335) is provided with a triangular cam (331). The triangular cam (331) cooperates with the triangular groove (311).

4. The control cable device for the release valve of a railway freight car according to claim 3, characterized in that, The annular housing (4) includes an annular box (40), a mounting plate (41), a sheath tube connector mounting seat (42), a front cover mounting surface (401), and a rear cover mounting surface (405). The interior of the annular box (40) is cylindrical and is used to house the rope wheel assembly (5). The mounting plate (41) has multiple mounting holes (410) for mounting and fixing the manipulator (1) to the vehicle body. The sheath tube connector mounting seat (42) is used to connect and fix the annular housing (4) and the cable mechanism (2). The sheath tube connector mounting seat (42) has an inner hole (421) for the wire rope (25) that operates the cable mechanism (2) to pass through and wind around the rope wheel assembly (5). The front cover mounting surface (401) and the rear cover mounting surface (405) are provided with a plurality of connecting through holes (404). The front end cover (3) and the rear cover (6) are respectively mounted on the front cover mounting surface (401) and the rear cover mounting surface (403) through the connecting through holes (404). The front cover mounting surface (401) and the rear cover mounting surface (405) are respectively provided with annular grooves (403). A second O-ring seal (16) is placed in the annular groove (403). The front cover mounting surface (401) and the rear cover mounting surface (405) are provided with through holes (402). The through holes (402) are used to drive in a pin (15) after the cable mechanism (2) is inserted into the inner hole (421) to fix the cable mechanism (2) axially.

5. The control cable device for the release valve of a railway freight car according to claim 4, characterized in that, The rear cover includes a rear cover body (60), a rear cover bearing (65), a ratchet pawl (61), a ratchet torsion spring (63), a cotter pin (64), a bearing clip (14), and an adjustment hole clip (66). The rear cover body (60) has a frustum in the middle, and the edge of the rear cover body (60) is annular. The center of the rear cover body (60) has a circular hole for mounting the rear cover bearing (65). The inner cylinder of the rear cover bearing (65) supports the pulley assembly (5), and the outer cylinder and step of the rear cover bearing (65) are used to engage the bearing clip (14) to seal the rear cover bearing (65). Multiple round holes (601) are provided on the edge of the 0), the round holes (601) are used to pass through the rivet 13 to connect with the annular housing part (4) and the front end cover part (3). A ratchet shaft mounting hole (603) is provided on the round platform, and a ratchet shaft (62) is welded on the ratchet shaft mounting hole (603). The pawl torsion spring (63) and the ratchet pawl (61) are sequentially sleeved on the ratchet shaft (62), and the pawl torsion spring (63) and the ratchet pawl (61) are axially fixed by the cotter pin (64). An adjustment hole (602) is provided on the round platform, and the adjustment hole (602) is used to adjust the position of the ratchet pawl (61) during the final assembly.

6. The control cable device for the release valve of a railway freight car according to claim 5, characterized in that, The spring mechanism includes a pulley shaft (52), a spring (51), a front nylon bearing (53), a rear nylon bearing (54), a pulley cover (55), and a ratchet (57). The pulley body (50) is a hollow disc shape. A threaded hole (505) is provided on the pulley body (50). The threaded hole (505) is used to fix the pulley cover (55) with bolts (56). An annular groove (504) is provided on the outer cylindrical surface of the pulley body (50). The steel wire rope (25) is wound and fixed in the annular groove (504). A bottom circular surface (506) is integrally formed on the left side of the pulley body (50). Multiple weight-reducing holes are provided on the bottom circular surface (506). The center of the sheave body (50) is provided with a shaft through hole (508), which is rotatably engaged with and axially positioned with the front nylon bearing (53) of the sheave. A clutch gear (502) is concentrically and integrally arranged on the outside of the shaft through hole (508), which is engaged with the triangular gear (333). The right side of the sheave body (50) is open for installing the sheave cover (55). The inner cavity of the sheave body (50) is a divided cylindrical space for placing the spring (51). The inner wall of the sheave body (50) is provided with a first hook-shaped through hole (501), which is used to install the outer end (511) of the spring (51).

7. The control cable device for the release valve of a railway freight car according to claim 5, characterized in that, The outer circumference of the ratchet (57) is provided with multiple ratchet teeth (572), which cooperate with the ratchet pawl (61) to make the ratchet (57) rotate only in one direction. The inner hole of the ratchet (57) is a flat round through hole (571), which is used to fit on the fourth cylinder (523) so that the ratchet (57) is circumferentially fixed to the rope wheel shaft (52).

8. The control cable device for the release valve of a railway freight car according to claim 7, characterized in that, The cable mechanism (2) includes a first protective tube joint (24), a protective sleeve (26), a second protective tube joint (21) structure, a return spring (27), and a relief valve connection terminal (22) connected in sequence. The left end of the first protective tube joint (24) is provided with a positioning groove and an O-ring installation groove. The O-ring installation groove is provided with a first O-ring (251). After the first protective tube joint (24) is inserted into the inner hole (421), the through hole (402) is aligned with the positioning groove and a pin (15) is driven in to fix the first protective tube joint (24) axially. The inner cylinder of the first protective tube joint (24) is used to pass through the wire rope (25). The wire rope (25) is connected to the relief valve connection terminal (22) in sequence through the protective sleeve (26), the second protective tube joint (21) structure, and the return structure. The outside of the return spring (27) is provided with a corrugated tube protective sleeve (23).

9. The control cable device for the release valve of a railway freight car according to claim 8, characterized in that, The second protective tube connector structure includes a second protective tube connector body (21), a ball joint nut (210), a ball joint connector body (212), a locking nut (214), and a nylon guide sleeve (215). The outer circle of the second protective tube connector body (21) is threaded for the ball joint nut (214) to be screwed on for axial adjustment of position. The left inner cylinder (211) of the second protective tube connector body (21) is connected to the protective tube (26), and the right inner cylinder of the second protective tube connector body (21) is connected to the nylon guide sleeve (215). The right outer circle step of the second protective tube connector body (21) is used to position the return spring (27). The outer circle of the ball joint nut (214) is spherical, and the inner circle of the ball joint nut (214) is cylindrical and threaded. The ball joint connector (212) is threaded with the outer diameter of the second protective tube connector (21) to adjust the relative axial position. The two ends of the ball joint connector (212) are provided with mounting through holes (213). The center of the ball joint connector (212) is provided with a semi-spherical ring hole for fitting the outer spherical notch of the ball joint nut (214). The ball joint connector (212) clamps the ball joint nut (214) so ​​that the ball joint connector (212) and the ball joint nut (214) can rotate around. When the wire rope (25) pulls the relief valve connection terminal (22), the fixed ball joint connector (212) and the moving relief valve connection terminal (22) are displaced, causing the axial direction of the wire rope (25) to change, thus preventing the wire rope (25) from getting stuck due to lateral force.

10. The operating cable device for the release valve of a railway freight car according to claim 8, characterized in that, The relief valve connection terminal (22) includes a body, a stepped cylinder (221), a second step on the left (222), a third step (223), and a hollow disc (224). The left side of the body is the stepped cylinder (221), and the right side of the body is integrally provided with the hollow disc (224). The stepped cylinder (221) is provided with an inner cylindrical blind hole (225). The inner cylindrical blind hole (225) is used to insert the steel wire rope (25) and connect it to the body by a snap-fit ​​method. The second step on the left (222) is used for... The positioning and locking mechanism is set with the reset spring (27), the third step (223) is fitted with the bellows sheath (23), and the hollow disc (224) is used to connect the handle of the relief valve. During installation, a round pin is passed through the handle of the relief valve and the central through hole of the hollow disc (224) respectively, so that the relief valve connection terminal (22) and the handle of the relief valve are hinged. The steel wire rope (25) is manipulated to pull the relief valve connection terminal (22), causing the handle of the relief valve to rotate, thereby making the relief valve work.

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