Brake release device and railway vehicle

Abstract

The application discloses a brake releasing device and a railway vehicle. The brake releasing device comprises a shell, a driving mechanism and a pull rope assembly. The pull rope assembly comprises a pull rope and a stroke acceleration unit. The driving mechanism drives the pull rope to move through the stroke acceleration unit. The stroke acceleration unit can release driving force to accelerate the movement of the pull rope. The stroke acceleration unit is matched with the pull rope. In the process of pulling the pull rope, the driving force can be released. The driving force can accelerate the movement of the pull rope. Therefore, the ratchet pawl can be separated from the ratchet more quickly. Thus, the problem of tooth collision between the ratchet pawl and the ratchet can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail vehicles, in particular to a brake release device and a rail vehicle. BACKGROUND

[0002] Traditional brake release devices generally use a manual method to pull the parking brake release rope, which often causes inconvenience in operation and cannot meet the operation of personnel on the vehicle. In recent years, the requirement for the operation convenience of rail vehicle products is getting higher and higher. In order to facilitate operation, an electrically controlled brake release device can be used, but the existing electrically controlled rail vehicle release device is prone to produce the problem of tooth collision between the pawl and the ratchet wheel when controlling the pawl to disengage from the ratchet wheel. SUMMARY

[0003] The purpose of the present application is to provide a brake release device to solve the problems in the prior art. By setting a stroke acceleration unit and cooperating with the pull rope, the driving force can be released during the pull rope pulling process. The driving force can accelerate the movement of the pull rope, so that the pawl disengages from the ratchet wheel more quickly, thereby avoiding the problem of tooth collision between the pawl and the ratchet wheel.

[0004] The brake release device provided by the present application comprises a housing, a driving mechanism and a pull rope assembly. The pull rope assembly comprises a pull rope and a stroke acceleration unit. The driving mechanism drives the pull rope to move through the stroke acceleration unit. The stroke acceleration unit can release driving force to accelerate the movement of the pull rope.

[0005] Further, the stroke acceleration unit comprises an elastic deformation member connected with the pull rope. When the driving mechanism drives the pull rope to move, the elastic deformation member can be elastically deformed and accumulate elastic force. When the elastic force accumulated by the elastic deformation member is released, the pull rope moves at a higher speed.

[0006] Further, the elastic deformation member comprises a compression spring. The compression spring has a fixed end fixed with the pull rope and a movable end arranged opposite to the fixed end. The driving mechanism cooperates with the movable end and pushes the compression spring to move through the movable end. During the movement of the compression spring, the movable end can move towards the fixed end to compress the compression spring.

[0007] Further, the pre-tightening force of the compression spring in the initial state is F1.

[0008] The brake release device comprises a pawl and a ratchet wheel. The opening force of the pawl disengaging from the ratchet wheel is F2. Wherein, F1 is less than F2.

[0009] Further, the compression spring comprises a first stop plate, a second stop plate, a sliding rod arranged on the second stop plate, a plurality of spring leaves sleeved on the sliding rod, and a fastener;

[0010] The first stop plate is sleeved on the sliding rod and can slide along the second stop plate to deform the spring leaves; the fastener is arranged on the sliding rod and located on the side of the first stop plate away from the second stop plate, and the fastener is used to abut against the first stop plate to limit the movement of the first stop plate away from the second stop plate.

[0011] Further, the movable sleeve is sleeved on the rotating sleeve, the rotating sleeve has a sleeve body and a limiting protrusion arranged on the outer wall of the sleeve body, the limiting protrusion is arranged in a spiral shape along the outer wall of the movable sleeve body; the limiting groove matched with the limiting protrusion is formed on the inner wall of the movable sleeve, and the limiting protrusion relatively slides along the limiting groove when the rotating sleeve rotates circumferentially.

[0012] The transmission mechanism further has a rotation limiting unit arranged on the movable sleeve to limit the circumferential rotation of the movable sleeve.

[0013] Further, the limiting protrusion is arranged in a plurality of parallel arrangements to form external threads on the outer wall of the sleeve body, and the inner threads matched with the external threads are correspondingly formed on the inner wall of the movable sleeve.

[0014] Further, the rotation limiting unit comprises a limiting plate fixed on the shell and a limiting hole arranged on the limiting plate, the limiting hole has a long axis direction, and the long axis direction extends along the axial direction of the rotating sleeve.

[0015] The movable sleeve is provided with a limiting rod which protrudes outward along the radial direction of the movable sleeve, the limiting rod extends into the limiting hole and can slide along the long axis direction of the limiting hole.

[0016] Further, the brake release device further has a first limiting switch and a second limiting switch arranged along the long axis direction of the limiting hole, the limiting rod slides between the first limiting switch and the second limiting switch and is used to trigger the first limiting switch and the second limiting switch.

[0017] The first limiting switch and the second limiting switch are both touch switches and are arranged on the limiting plate, and the first limiting switch and the second limiting switch are arranged on the two sides of the limiting hole.

[0018] Further, the transmission mechanism comprises a sleeve gear coaxially arranged with the sleeve body and a connecting gear, the driving mechanism comprises a motor gear arranged on an output shaft of the motor, and the connecting gear is arranged between the motor gear and the sleeve gear.

[0019] Further, the sleeve gear comprises a gear body engaged with the connecting gear and a supporting portion arranged on the gear body and protruding away from the sleeve body, and the side of the supporting portion away from the sleeve body is supported on the housing to limit the movement of the rotating sleeve in the axial direction away from the transmission gear.

[0020] Further, the supporting portion is annularly arranged on the gear body, and the supporting portion is further provided with a thrust ball bearing between the housing walls.

[0021] The housing is provided with a bearing groove matched with the thrust ball bearing, the thrust ball bearing is positioned in the bearing groove, and the supporting portion is supported on the side of the thrust ball bearing away from the bearing groove.

[0022] Further, the housing is further provided with a housing limiting portion, and the rotating sleeve is provided with a sleeve axial limiting portion for abutting against the housing limiting portion to limit the movement of the rotating sleeve in the direction away from the sleeve gear.

[0023] The sleeve axial limiting portion is annularly arranged on the outer wall of the rotating sleeve.

[0024] Further, the housing comprises a first housing and a second housing, the second housing is provided with a first groove, a second groove, a partition plate separating the first groove and the second groove, and a rotating sleeve through hole arranged on the partition plate and communicating the first groove and the second groove, and the first housing is arranged at the opening position of the first groove and forms a first space with the first groove.

[0025] The sleeve body extends in the second groove through the sleeve through hole of the first groove, the housing limiting portion is arranged at the bottom of the first groove and at the edge of the sleeve through hole, the sleeve axial limiting portion is arranged to limit the sleeve through hole, and the sleeve gear and the connecting gear are located in the first space.

[0026] Another embodiment of the present application further discloses a rail vehicle comprising the brake release device.

[0027] Compared with the prior art, the stroke acceleration unit is arranged to cooperate with the pull rope, and the driving force can be released during the pulling of the pull rope, the driving force can accelerate the movement of the pull rope, so that the ratchet pawl can be more quickly separated from the ratchet, and the problem of tooth collision between the ratchet pawl and the ratchet can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a brake release device disclosed by an embodiment of the present application;

[0029] Figure 2 is a first internal structure schematic diagram of a brake release device disclosed by an embodiment of the present application;

[0030] Figure 3 is a second internal structure schematic diagram of a brake release device disclosed by an embodiment of the present application;

[0031] Figure 4 is a third internal structure schematic diagram of a brake release device disclosed by an embodiment of the present application;

[0032] Figure 5 is an assembly structure schematic diagram of a rotating sleeve and a movable sleeve in a brake release device disclosed by an embodiment of the present application;

[0033] Figure 6 is an assembly structure schematic diagram of a movable sleeve and a sleeve gear in a brake release device disclosed by an embodiment of the present application;

[0034] Figure 7 is a structure schematic diagram of a second housing in a brake release device disclosed by an embodiment of the present application;

[0035] Reference signs: 1 - driving mechanism, 11 - motor,

[0036] 2 - pull rope assembly, 21 - pull rope,

[0037] 3 - transmission mechanism, 31 - rotating sleeve, 311 - sleeve body, 312 - limiting protrusion, 313 - sleeve axial limiting part,

[0038] 32 - movable sleeve, 321 - movable groove, 322 - limiting rod, 33 - sleeve gear, 331 - gear body, 332 - support part,

[0039] 34 - connecting gear, 35 - motor gear, 36 - thrust ball bearing,

[0040] 4 - housing, 40 - bearing groove, 41 - housing limiting part, 42 - first housing, 43 - second housing, 431 - first groove, 432 - second groove, 433 - partition plate, 434 - sleeve through hole, 44 - avoiding groove,

[0041] 5 - rotation limiting unit, 51 - limiting plate, 52 - limiting hole,

[0042] 6 - limiting switch, 61 - first limiting switch, 62 - second limiting switch,

[0043] 7 - manual control, 71 - handle, 72 - handle connector, 8 - stroke acceleration unit, 81 - compression spring, 811 - fixed end, 812 - movable end, 813 - first stopper, 814 - second stopper, 815 - slide rod, 816 - spring leaf, 817 - fastener. DETAILED DESCRIPTION

[0044] The embodiments described below are exemplary only, and are not to be construed as limiting the present application.

[0045] Embodiments of the present application: as shown, a brake release device is disclosed, which is mainly used for rail vehicles, comprising a driving mechanism 1, a pull rope assembly 2, a transmission mechanism 3 and a housing 4, the driving mechanism 1 and the pull rope assembly 2 are arranged in the housing 4, the driving mechanism 1 drives the pull rope assembly 2 to move through the transmission mechanism 3, the pull rope assembly 2 is used to pull the ratchet pawl on the rail vehicle parking brake during movement, thereby realizing the forced release of the parking brake force of the rail vehicle parking brake. Figures 1-5 In the prior art, a cylinder is generally used as a driving member, which realizes the pulling of the pull rope assembly 2 and the rotation of the ratchet pawl during the extension and retraction of the cylinder. The controllability of the cylinder extension and retraction is relatively weak, which can easily cause the overstretching of the pull rope assembly 2 and the breakage of the pull rope.

[0046] The brake release device disclosed in the embodiment adopts a motor 11 as a driving member, and then converts the torque output by the motor 11 into linear movement through the arrangement of the transmission mechanism 3, and drives the pull rope of the pull rope assembly 2 to move during linear movement.

[0047] Although the movement of the pull rope 21 can be more stably controlled during the movement of the pull rope assembly 2 controlled by the motor 11, the pulling of the pull rope 21 is too smooth, which can easily cause the ratchet pawl to separate from the ratchet at a slow speed, thereby easily causing the occurrence of tooth engagement, and causing wear of the ratchet and the ratchet pawl.

[0048] In order to solve the above problems, the brake release device of the present application further comprises a stroke acceleration unit 8, the driving mechanism 1 drives the pull rope 21 to move through the stroke acceleration unit 8, and the stroke acceleration unit 8 can release driving force to drive the pull rope 21 to move at a high speed.

[0049] As shown in

[0050] Figures 2-4 ​As shown, the driving mechanism 1 drives the pull rope 21 and the stroke acceleration unit 8 to move synchronously, and in the moving process, the pull rope 21 pulls the ratchet pawl to generate a tendency of rotation, when the pull rope 21 and the stroke acceleration unit 8 move to a certain position, the pulling force generated on the pull rope 21 is enough to pull the ratchet pawl to generate movement, at this time, the stroke acceleration unit 8 releases the driving force, which can accelerate the movement of the pull rope 21, so that the ratchet pawl is more quickly separated from the ratchet, thereby avoiding the problem of tooth collision between the ratchet pawl and the ratchet.

[0051] The stroke acceleration unit 8 comprises an elastic deformation member connected with the pull rope 21, when the driving mechanism 1 drives the pull rope 21 to move, the elastic deformation member is elastically deformed and accumulates the elastic restoring force, when the accumulated elastic restoring force is released, the elastic deformation member drives the pull rope 21 to accelerate the movement.

[0052] In an embodiment, the elastic deformation member comprises a compression spring 81, the compression spring 81 has a fixed end 811 fixed with the pull rope 21 and a movable end 812 arranged opposite to the fixed end 811, the fixed end 811 is located at a position relatively farther away from the movable sleeve 32 relative to the movable end 812. The driving mechanism 1 cooperates with the movable end 812, the driving mechanism 1 pushes the compression spring 81 to move through the movable end 812, in the moving process of the compression spring 81, the movable end 812 can move towards the fixed end direction to compress the compression spring 81.

[0053] In the initial state, the pre-tightening force of the compression spring 81 arranged thereon is F1; the pre-tightening force F1 is the pre-compression deformation amount of the compression spring 81. The brake release device comprises a ratchet pawl and a ratchet, the opening force of the ratchet pawl separated from the ratchet is F2; wherein, the F1 is less than the F2.

[0054] The ratchet pawl is connected and fixed with the pull rope 21, the pull rope 21 can pull the ratchet pawl to separate from the cooperation with the ratchet, the opening force F2 is the force required for the pull rope 21 to pull the ratchet pawl to separate from the cooperation with the ratchet. In the embodiment, the pre-tightening force F1 is less than the F2, so that when the force acting on the pull rope 21 is less than the F2 and greater than the F1 in the process that the pull rope 21 starts to pull the ratchet pawl, the driving mechanism 1 will drive the compression spring 81 to compress and deform, so that the movable end 812 approaches the fixed end 811 direction;

[0055] When the force acting on the pull rope 21 increases to the F2, at this time, the ratchet pawl separates from the ratchet, the end of the pull rope 21 away from the movable end 812 is released from the restriction, the elastic restoring force accumulated by the compression spring 81 is released, because the movable end 812 is restricted by the driving mechanism 1, the elastic restoring force can only drive the fixed end 811 to move away from the movable end 812 direction, thereby achieving the effect of accelerating the movement of the pull rope 21.

[0056] In the embodiment, the compression spring 81 can be a common coil spring, and in the embodiment, the compression spring 81 comprises a first blocking piece 813, a second blocking piece 814, a sliding rod 815 arranged on the second blocking piece 814, a plurality of spring leaves 816 sleeved on the sliding rod 815, and a fastener 817.

[0057] The first blocking piece 813 is sleeved on the sliding rod 815 and can slide along the second blocking piece 814 to deform the spring leaves 816; the fastener 817 is arranged on the sliding rod 815 and located on a side of the first blocking piece 813 away from the second blocking piece 814, and the fastener 817 is used to abut against the first blocking piece 813 to limit the movement of the first blocking piece 813 away from the second blocking piece 814.

[0058] The fixed end 811 is arranged on the second blocking piece 814, and the movable end 812 is arranged on the first blocking piece 813. In the above embodiment, in the initial stage of the action of the driving mechanism 1, the output force is small, and the moving speed of the pull rope is fast. With the continuous work of the driving mechanism 1, the resistance on the pull rope 21 gradually increases, and when the resistance reaches F1, the moving speed of the pull rope 21 slows down. At this time, the compression spring 81 is compressed to accumulate the elastic force.

[0059] When the tension on the pull rope 21 reaches the opening pressure F2 of the ratchet pawl, the ratchet pawl is separated from the ratchet, and in the instant of separation, the resistance decreases to release the elastic force, so that the speed of the ratchet pawl separating from the ratchet meets the requirements, and the elastic force released by the compression spring 81 drives the pull rope 21 to move in the direction away from the driving mechanism 1 at a high speed, thereby avoiding the problem of tooth collision between the ratchet pawl and the ratchet. In other embodiments, in the initial stage of the action of the driving mechanism 1, the compression spring 81 and the pull rope 21 can also move as a whole, and then the compression spring 81 is pressed as the tension on the pull rope 21 increases.

[0060] In the embodiment, the driving mechanism 1 comprises a motor 11, and the brake releasing device further comprises a transmission mechanism 3, the transmission mechanism 3 comprises a rotating sleeve 31 and a movable sleeve 32 in rotation cooperation with the housing 4, and the motor 11 drives the rotating sleeve 31 to rotate in the circumferential direction; the rotating sleeve 31 drives the movable sleeve 32 to move, the movable sleeve 32 has a movement component in the axial direction of the rotating sleeve 31, and the movable sleeve 32 drives the movable end 812 to move in the axial direction of the rotating sleeve 31 in the process of moving in the circumferential direction of the rotating sleeve 31.

[0061] When the movable sleeve 32 pushes the movable end 812, the movable sleeve 32 moves towards the fixed end 811 first, and in this movement, the tension rope 21 does not move, and the compression spring 81 is compressed. When the compression spring 81 is compressed to a certain extent, with the further pushing of the movable sleeve 32, the compression spring 81 as a whole moves away from the rotating sleeve 31, and drives the tension rope 21 to move. In the movement of the tension rope 21, when the force of the tension rope 21 can counteract the force of the ratchet stop pawl and the ratchet, the further movement of the tension rope 21 will pull the ratchet stop pawl away from the ratchet. At this moment, the force of the end of the tension rope 21 connected with the ratchet stop pawl is weakened or removed. Under the action of the elastic force accumulated in the compression of the compression spring 81, the fixed end 811 fixed with the tension rope 21 moves away from the movable end 812. In this movement, the movement of the tension rope 21 is accelerated, that is, the speed of the ratchet stop pawl moving away from the ratchet is accelerated, thereby effectively avoiding the problem of tooth collision between the ratchet stop pawl and the ratchet.

[0062] After the force of the end of the tension rope 21 connected with the ratchet stop pawl is weakened or removed, because the movable sleeve 32 abuts against the movable end 812, the elastic force accumulated in the compression of the compression spring 81 can only make the fixed end 811 drive the tension rope 21 to move away from the movable end 812.

[0063] As shown in Figure 2 It can be understood that in order to form an avoidance for the movement of the movable end 812, an avoidance groove 44 is arranged on the shell 4. The avoidance groove 44 is recessed from the shell 4 away from the movable end 812, and the shape of the avoidance groove 44 is matched with the shape of the compression spring 81.

[0064] In another embodiment, the elastic deformation member comprises a tension spring having a movable end fixedly connected with the movable sleeve 32 and a fixed end fixedly connected with the pull rope 21, the fixed end is located closer to the rotating sleeve 31 than the movable end, the movable sleeve 32 drives the movable end of the tension spring to move away from the rotating sleeve 31 during the axial movement, the tension spring is stretched and accumulates elastic force, at this time the pull rope 21 does not move with the fixed end, with the further pushing of the movable sleeve 32, the tension spring moves synchronously with the pull rope 21, when the force of the pull rope 21 can counteract the force of the ratchet pawl and the ratchet during the movement of the pull rope 21, the further movement of the pull rope 21 will pull the ratchet pawl to disengage from the ratchet, at this moment the force of the end of the pull rope 21 connected with the ratchet pawl is weakened or removed, and the fixed end fixedly connected with the pull rope 21 moves towards the movable end under the action of the elastic force accumulated by the tension spring during the stretching of the tension spring, which accelerates the movement of the pull rope 21, that is, the speed of the ratchet pawl disengaging from the ratchet is accelerated, thereby effectively avoiding the problem of tooth collision between the ratchet pawl and the ratchet.

[0065] It should be noted that the above embodiment only gives a scheme in which the stroke acceleration unit 8 is applied to the motor 11 of the driving mechanism 1, and the stroke acceleration unit 8 can also be used to control the ratchet pawl to accelerate the disengagement from the ratchet to avoid the tooth collision between the ratchet pawl and the ratchet for other driving mechanisms 1 such as air cylinders.

[0066] In a specific embodiment, as shown in Figures 2-5 the driving mechanism 1 comprises a motor 11, the transmission mechanism 3 comprises a rotating sleeve 31 and a movable sleeve 32 in rotational cooperation with the housing 4, the motor 11 drives the rotating sleeve 31 to rotate along the circumferential direction thereof, the rotating sleeve 31 cooperates with the movable sleeve 32 and drives the movable sleeve 32 to move when the rotating sleeve 31 rotates, and the movable sleeve 32 has a movement component in the axial direction of the rotating sleeve 31. The movable sleeve 32 drives the pull rope assembly 2 to move during the movement in the axial direction of the rotating sleeve 31.

[0067] It can be understood that the pull rope assembly 2 has a pull rope 21 cooperating with the movable sleeve 32, the pull rope 21 is fixedly connected with the movable sleeve 32, and the pull rope 21 can move in the axial direction of the rotating sleeve 31 under the driving of the movable sleeve 32.

[0068] The torque generated by rotating the motor 11 by rotating the sleeve 31 in cooperation with the movable sleeve 32 is converted into driving force for driving the movable sleeve 32 to move axially. The movable sleeve 32 can pull the pull rope 21 to move during axial movement, thereby achieving control of the ratchet pawl. By using the motor 11 as a driving member, the control of the movement of the pull rope 21 can be more convenient, and the pulling of the pull rope 21 during pulling can be more controllable, thereby reducing the overstretching of the pull rope 21 and prolonging the service life of the pull rope 21.

[0069] When the motor 11 rotates forward, the rotating sleeve 31 can be driven to rotate forward, and the rotating sleeve 31 drives the movable sleeve 32 to move away from the ratchet pawl during forward rotation, thereby pulling the ratchet pawl away from the ratchet to make the ratchet rotate and thereby release the brake. When the motor 11 rotates reversely, the pull rope 21 is reset by the reset action of the brake end itself, and at this time the ratchet pawl is clamped into the ratchet to achieve the reset of the parking brake relief device.

[0070] As shown in Figure 5 In this embodiment, the movable sleeve 32 is sleeved on the rotating sleeve 31, and the movable sleeve 32 is coaxially arranged with the rotating sleeve 31. The rotating sleeve 31 has a sleeve body 311 and a limiting protrusion 312 arranged on the outer wall of the sleeve body 311. The limiting protrusion 312 extends in a spiral shape along the outer wall of the sleeve body 311. The inner wall of the movable sleeve 32 is formed with a movable groove 321 matched with the limiting protrusion 312. When the rotating sleeve 31 rotates circumferentially, the limiting protrusion 312 slides along the movable groove 321.

[0071] As shown in Figure 2 The brake relief device also has a rotation limiting unit 5 arranged outside the movable sleeve 32 to limit the circumferential rotation of the movable sleeve 32.

[0072] During rotation, the rotating sleeve 31 actually drives the movable sleeve 32 to rotate, and at the same time can generate a movement component moving axially. Of course, the rotating sleeve 31 also has the condition of synchronous rotation with the movable sleeve 32. In order to avoid this situation, the rotation limiting unit 5 is arranged in this embodiment to limit the circumferential rotation of the movable sleeve 32. After the movable sleeve 32 is limited to rotate circumferentially, the force acting on the movable sleeve 32 by the rotating sleeve 31 can only generate axial movement, thereby better controlling the movement of the pull rope 21.

[0073] In the above embodiment, the movable sleeve 32 is sleeved outside the rotating sleeve 31, and in other embodiments, the rotating sleeve 31 can also be sleeved outside the movable sleeve 32. The rotating sleeve 31 is coaxially arranged with the movable sleeve 32, a limiting groove is formed outside the movable sleeve 32, and a limiting protrusion is formed on the inner wall of the rotating sleeve 31. During cooperation of the rotating sleeve 31 and the movable sleeve 32, the limiting protrusion slides along the limiting groove.

[0074] In the embodiment, the limiting protrusion 312 is wound around the outer wall of the sleeve body 311 for multiple turns to form an external thread, and the inner wall of the movable sleeve 32 is correspondingly formed with an internal thread matched with the external thread. Through cooperation of the internal thread and the external thread, the driving of the movable sleeve 32 by the rotating sleeve 31 can be more smooth.

[0075] Specifically, as shown in Figure 4 In the embodiment, the rotation limiting unit 5 includes a limiting plate 51 fixed on the shell 4 and a limiting hole 52 arranged on the limiting plate 51. The limiting hole 52 has a long axis direction extending along the axial direction of the rotating sleeve 31. The limiting hole 52 is integrally arranged in a flat and long strip shape. The extension direction of the long axis of the limiting hole 52 is parallel to the axial direction of the rotating sleeve 31, and the limiting plate 51 can slide in the limiting hole 52.

[0076] As shown in Figures 4-5 The movable sleeve 32 is provided with a limiting rod 322 protruding outward along the radial direction of the movable sleeve 32. The limiting rod 322 extends outward from the outer wall of the movable sleeve 32 and is arranged in the limiting hole 52. The limiting rod 322 can move along the long axis direction of the limiting hole 52 with the movement of the movable sleeve 32.

[0077] Further, as shown in Figures 2-4 The brake release device also has a limiting switch 6. The limiting switch 6 includes a first limiting switch 61 and a second limiting switch 62. The first limiting switch 61 and the second limiting switch 62 are arranged along the long axis direction of the limiting hole 52. The limiting rod 322 slides between the first limiting switch 61 and the second limiting switch 62 and is used to trigger the first limiting switch 61 and the second limiting switch 62.

[0078] Two limit switches 6, one for controlling the stroke limit of the motor 11 in forward rotation, and the other for controlling the stroke limit of the motor 11 in reverse rotation. When the limit rod 322 triggers the first limit switch 61, the motor 11 is controlled to stop forward rotation, which is the limit of the motor 11 in forward rotation. Similarly, when the limit rod 322 triggers the second limit switch 62, the motor 11 is controlled to stop reverse rotation, which is the limit of the motor 11 in reverse rotation. It can be understood that the specific limit switch 6 that controls the forward rotation can be adjusted and replaced according to actual needs, which is not specifically limited here, but is only described as a specific scheme.

[0079] In a specific embodiment, the first limit switch 61 and the second limit switch 62 are both touch switches and are respectively arranged on the limit plate 51, and the first limit switch 61 and the second limit switch 62 are oppositely arranged on both sides of the limit hole 52. When the limit rod 322 moves to touch the first limit switch 61, the first limit switch 61 is triggered. Similarly, when the limit rod 322 moves to touch the second limit switch 62, the second limit switch 62 is triggered.

[0080] It can be understood that the brake release device also has a control unit, which is in communication connection or electrical connection with the first limit switch 61 and the second limit switch 62, respectively. The limit switch is used to send a signal to the control unit, and the control unit controls the rotation of the motor 11 according to the received signal.

[0081] The transmission mechanism 3 includes a connecting gear 34, a motor gear 35, and a sleeve gear 33 coaxially arranged with the sleeve body 311. The motor gear 35 is arranged on the output shaft of the motor 11, and the connecting gear 34 is arranged between the motor gear 35 and the sleeve gear 33.

[0082] The specific structure of the connecting gear 34 is not specifically limited here and can be adjusted and designed according to actual needs. The connecting gear 34 serves as an intermediate gear for transmitting torque. In other embodiments, the sleeve gear 33 can be directly driven to rotate by the motor gear 35, thereby omitting the connecting gear 34. In the present embodiment, the arrangement of the connecting gear 34 can better facilitate the transmission of torque and also make it more convenient and flexible to arrange the positions of the motor 11 and the movable sleeve 32.

[0083] As Figures 2-3 and Figure 6As shown, the sleeve gear 33 includes a gear body 331 that meshes with the connecting gear 34 and a support portion 332 disposed on the gear body 331 and protruding in a direction away from the sleeve body 311. The side of the support portion 332 away from the sleeve body 311 is used for positioning and supporting on the housing 4 to restrict the movement of the rotating sleeve 31 in the direction of the sleeve gear 33 in the axial direction.

[0084] In a specific embodiment, the sleeve gear 33 and the rotating sleeve 31 can be integrated. In this embodiment, for easier assembly, such as... Figures 5-6 As shown, the sleeve gear 33 and the rotating sleeve 31 are separate parts, and they are assembled together. Specifically, the assembly can be completed by interference fit or by other connection and fixing methods.

[0085] The sleeve gear 33 has a mounting hole, and part of the rotating sleeve 31 extends into the mounting hole and forms an interference fit with the sleeve gear 33, thereby realizing the installation and fixation of the sleeve gear 33 on the rotating sleeve 31.

[0086] It should be noted that the side of the support part 332 away from the sleeve body 311 can directly abut against the inner wall of the housing 4 to position the rotating sleeve 31 in the axial direction. Of course, the support part 332 and the inner wall of the housing 4 can also be positioned and supported by an intermediate component, that is, the support part 332 abuts against the intermediate component located between the support part 332 and the housing 4, and the intermediate component is positioned on the inner wall of the housing 4.

[0087] In this embodiment, in order to better realize the rotation of the rotating sleeve 31, the support part 332 is arranged in a ring on the gear body 331, and a thrust ball bearing 36 is also provided between the support part 332 and the inner wall of the housing 4.

[0088] like Figures 2-3 As shown, the housing 4 is provided with a bearing groove 40 that is adapted to the thrust ball bearing 36. The thrust ball bearing 36 is the intermediate component that abuts against the support part 332 and the housing 4.

[0089] The thrust ball bearing 36 is positioned within the bearing groove 40, and the support portion 332 is positioned and supported on the side of the thrust ball bearing 36 away from the bearing groove 40.

[0090] The thrust ball bearing 36 includes a pair of annular plates arranged opposite each other and balls disposed between the pair of annular plates. The pair of annular plates can rotate relative to each other in the circumferential direction. One annular plate is positioned opposite to the bearing groove 40, and the other annular plate is used to abut against the support part 332, thereby achieving axial support and fixation of the support part 332 and effectively preventing the rotating sleeve 31 from moving in the axial direction.

[0091] The intermediate part is arranged as a thrust ball bearing 36, which can reduce the friction during rotation of the rotating sleeve 31. If the end of the rotating sleeve 31 directly abuts against the housing 4, the rotating sleeve 31 directly contacts the inner wall of the housing 4, and the friction between them is large. When the rotating sleeve 31 is subjected to an axial force, the pressure on the inner wall of the housing 4 increases, and the increase in pressure increases the friction during rotation of the rotating sleeve 31, thereby affecting rotation, and also causing the rotating sleeve 31 to produce a large noise during rotation.

[0092] The thrust ball bearing 36 is actually arranged such that the annular plate at the fixed end of the thrust ball bearing 36 is fixed to the inner wall of the housing 4, and the annular plate at the movable end of the thrust ball bearing 36 is used to receive the abutting force of the rotating sleeve 31. The annular plate at the movable end of the thrust ball bearing 36 can rotate relative to the annular plate at the fixed end of the thrust ball bearing 36. The thrust ball bearing 36 can bear the axial thrust load of the rotating sleeve 31.

[0093] In the above description, the rotating sleeve 31 is moved in the axial direction away from the movable sleeve 32. Further, in order to make the rotating sleeve 31 rotate more stably, it is also necessary to limit the movement of the rotating sleeve 31 in the axial direction towards the movable sleeve 32.

[0094] The housing 4 also has a housing limiting part 41, and the rotating sleeve 31 is provided with a sleeve axial limiting part 313. The sleeve axial limiting part 313 is used to abut against the housing limiting part 41 to limit the movement of the rotating sleeve 31 away from the sleeve gear 33, i.e., the cooperation of the housing limiting part 41 and the sleeve axial limiting part 313 achieves the limitation of the movement of the rotating sleeve 31 in the axial direction towards the movable sleeve 32.

[0095] In specific embodiments, the sleeve axial limiting part 313 is annularly arranged on the outer wall of the rotating sleeve 31. The sleeve axial limiting part 313 is formed by protruding outward from the outer wall of the rotating sleeve 31 and is annularly arranged on the outer wall of the rotating sleeve 31.

[0096] In the present embodiment, as shown in Figures 2-3 and Figure 7As shown, the shell 4 comprises a first shell 42 and a second shell 43, the second shell 43 has a first groove 431, a second groove 432, a partition plate 433 separating the first groove 431 and the second groove 432, and a sleeve hole 434 provided on the partition plate 433, the sleeve hole 434 communicates the first groove 431 and the second groove 432; the first shell 42 is arranged at the opening position of the first groove 431, the first shell 42 covers the opening of the first groove 431, and a first space is formed between the first shell 42 and the first groove 431;

[0097] The sleeve body 311 is arranged in the second groove 432 from the first groove 431 through the sleeve hole 434, the shell limiting part 41 is arranged at the bottom of the first groove 431 and at the edge of the sleeve hole 434, the sleeve axial limiting part 313 is arranged to limit the sleeve hole 434, and the sleeve gear 33 and the connecting gear 34 are arranged in the first space.

[0098] As shown in the drawings, Figures 2-4 The brake release device also has a manual control 7, the manual control 7 comprises a handle 71 and a handle connecting part 72 arranged on the handle 71, and the handle connecting part is connected and fixed with the pull rope 21. When the handle 71 is manually pulled, the handle 71 drives the pull rope 21 to move through the handle connecting part 71, so as to drive the ratchet pawl to rotate, make the ratchet pawl disengage from the ratchet, and then realize brake release.

[0099] The arrangement of the handle control 7 can manually release the parking brake when the driving mechanism 1 fails. The brake release device integrates the electric release function and the manual release function, and provides guarantee for stable use of the brake release device.

[0100] Another embodiment of the application also discloses a rail vehicle, which comprises the brake release device.

[0101] The above embodiment according to the drawings details the structure, features and effects of the application, and the above description is only the preferred embodiment of the application, but the application is not limited by the drawings, any change or modification made according to the idea of the application, or the equivalent embodiment of the equivalent change, as long as it is within the scope of the application.

Claims

1. A brake release device, characterized by The application relates to a drive mechanism and a brake release device. The drive mechanism comprises a housing, a drive mechanism and a pull rope assembly; the pull rope assembly comprises a pull rope and a stroke acceleration unit, the drive mechanism drives the pull rope to move through the stroke acceleration unit, and the stroke acceleration unit can release driving force to accelerate the movement of the pull rope. The stroke acceleration unit comprises an elastic deformation member connected with the pull rope; when the drive mechanism drives the pull rope to move, the elastic deformation member can be elastically deformed and store elastic recovery force; and the elastic recovery force stored by the elastic deformation member is released to accelerate the movement of the pull rope.

2. The brake release device according to claim 1, characterized in that: The elastic deformation member comprises a compression spring, the compression spring has a fixed end fixed with the pull rope and a movable end arranged opposite to the fixed end, the drive mechanism cooperates with the movable end, and the drive mechanism drives the compression spring to move through the movable end; during the movement of the compression spring, the movable end can move towards the fixed end to compress the compression spring.

3. The brake release device according to claim 2, characterized in that: The pre-tightening force of the compression spring in an initial state is F1; The brake release device comprises a ratchet pawl and a ratchet; the opening force of the ratchet pawl from the ratchet is F2; and F1 is smaller than F2.

4. The brake release device according to claim 2, characterized by: The compression spring comprises oppositely arranged first and second stop sheets, a sliding rod arranged on the second stop sheet, a plurality of spring sheets sleeved outside the sliding rod and a fastener. The first stop sheet is sleeved outside the sliding rod and can slide along the second stop sheet to deform the spring sheets; the fastener is arranged on the sliding rod and located on the side of the first stop sheet away from the second stop sheet, and the fastener is used to abut against the first stop sheet to limit the movement of the first stop sheet away from the second stop sheet.

5. The brake release device of claim 4, wherein: The drive mechanism comprises a motor, and the brake release device further comprises a transmission mechanism; the transmission mechanism comprises a rotating sleeve pipe and a movable sleeve pipe which rotate with the housing; the motor drives the rotating sleeve pipe to rotate in a circumferential direction; the rotating sleeve pipe drives the movable sleeve pipe to move, the movable sleeve pipe has a movement component in the axial direction of the rotating sleeve pipe, and the movable sleeve pipe drives the movable end to move in the axial direction of the rotating sleeve pipe.

6. The brake release device of claim 5, wherein: The movable sleeve pipe is sleeved outside the rotating sleeve pipe, the rotating sleeve pipe has a sleeve pipe body and a limiting protrusion arranged on the outer wall of the sleeve pipe body, the limiting protrusion extends in a spiral shape along the outer wall of the movable sleeve pipe body; the limiting groove matched with the limiting protrusion is formed on the inner wall of the movable sleeve pipe; and when the rotating sleeve pipe rotates in the circumferential direction, the limiting protrusion relatively slides along the limiting groove. The transmission mechanism further has a rotation limiting unit arranged outside the movable sleeve pipe to limit the circumferential rotation of the movable sleeve pipe.

7. A brake release device according to claim 6, characterised in that: The limiting protrusion is arranged in multiple and parallel to form external threads on the outer wall of the sleeve pipe body; and the inner threads matched with the external threads are correspondingly formed on the inner wall of the movable sleeve pipe.

8. The brake release device of claim 6, wherein: The rotation limiting unit comprises a limiting plate fixed on the housing and a limiting hole arranged on the limiting plate; the limiting hole has a long axis direction, and the long axis direction extends in the axial direction of the rotating sleeve pipe. The movable sleeve is externally provided with a limiting rod which protrudes outward along the radial direction of the movable sleeve, and the limiting rod extends into the limiting hole and can slide along the long axis direction of the limiting hole.

9. The brake release device of claim 8, wherein: The brake release device is further provided with a first limiting switch and a second limiting switch which are arranged along the long axis direction of the limiting hole, and the limiting rod slides between the first limiting switch and the second limiting switch and is used to trigger the first limiting switch and the second limiting switch. The first limiting switch and the second limiting switch are both touch switches and are arranged on the limiting plate, and the first limiting switch and the second limiting switch are oppositely arranged on both sides of the limiting hole.

10. The brake release device of claim 6, wherein: The transmission mechanism comprises a sleeve gear coaxially arranged with the sleeve body and a connecting gear, and the driving mechanism comprises a motor gear arranged on the output shaft of the motor, and the connecting gear is arranged between the motor gear and the sleeve gear.

11. The brake release device of claim 10, wherein: The sleeve gear comprises a gear body which is engaged with the connecting gear and a support portion which is arranged on the gear body and protrudes away from the sleeve body, and the side of the support portion away from the sleeve body is positioned and supported on the shell to limit the movement of the rotating sleeve in the axial direction towards the transmission gear.

12. The brake release device of claim 11, wherein: The support portion is annularly arranged on the gear body, and the support portion is further provided with a thrust ball bearing between the shell walls. The shell is provided with a bearing groove which is matched with the thrust ball bearing, the thrust ball bearing is positioned in the bearing groove, and the support portion is positioned and supported on the side of the thrust ball bearing away from the bearing groove.

13. The brake release device of claim 11, wherein: The shell is further provided with a shell limiting portion, and the rotating sleeve is provided with a sleeve axial limiting portion which is used to abut against the shell limiting portion to limit the movement of the rotating sleeve away from the sleeve gear; The sleeve axial limiting portion is annularly arranged on the outer wall of the rotating sleeve.

14. The brake release device of claim 11, wherein: The shell comprises a first shell and a second shell, the second shell is provided with a first groove, a second groove, a partition plate which separates the first groove and the second groove, and a rotating sleeve through hole which is arranged on the partition plate and communicates the first groove and the second groove, the first shell is arranged at the opening position of the first groove and forms a first space with the first groove; The sleeve body extends through the sleeve through hole of the first groove and is arranged in the second groove, the shell limiting portion is arranged at the bottom of the first groove and at the edge of the sleeve through hole, the sleeve axial limiting portion is arranged to limit the sleeve through hole, and the sleeve gear and the connecting gear are both located in the first space.

15. A rail vehicle characterized by: The brake release device comprises the brake release device according to any one of claims 1 to 14. The brake release device comprises the brake release device according to any one of claims 1 to 14.

Images