Automatic parking brake cylinder for railway vehicle

Abstract

The utility model discloses an automatic parking brake cylinder for a railway vehicle, which belongs to the technical field of railway vehicle braking and comprises a cylinder body and a parking main body mounting block. The front end of the piston a is connected with a piston rod, the piston rod penetrates through the cylinder cover, the front end of the piston rod is provided with a fork-shaped push rod, the front end of the fork-shaped push rod is connected with a basic braking device, the piston rod is sleeved with a relieving spring, and the relieving spring is clamped between the cylinder cover and the piston a; the parking main body mounting block comprises a pawl row and a clutch mechanism; the piston rod is sleeved with the parking body installation block, a ratchet row is arranged on the matching face of the piston rod and the parking body installation block, and the rear end of the parking body installation block is connected to the front end of the cylinder cover. The pawl row is mounted on the inner side of the parking main body mounting block; the clutch mechanism is installed on the parking body installation block and used for controlling opening and closing of the pawl row and the ratchet row. The functions of service braking, automatic parking, manual parking release under the fault condition and the like can be achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of railway vehicle braking, and particularly relates to an automatic parking brake cylinder for a railway vehicle. BACKGROUND

[0002] The problem of railway vehicle running away is a major safety issue of railways. At present, in order to ensure the safe parking of trains and prevent the running away of vehicles, the main anti-running measures taken by domestic and foreign railway vehicles are still the traditional manual operation of vehicle hand brakes and the placement of anti-running iron shoes. In addition, there are also a small number of vehicles on the market that are equipped with automatic parking devices to prevent running away.

[0003] The manual anti-running operation has the following shortcomings:

[0004] 1. Complicated operation and long time consumption

[0005] Manual anti-running operation usually requires manual operation of the brake or placement of anti-running equipment such as iron shoes in each carriage, which not only is complicated to operate, but also greatly prolongs the operation time.

[0006] Especially when the anti-running measures are removed, manual operation is also required for each carriage, which increases the risk of missing operation and may cause safety hazards.

[0007] 2. High labor intensity and high risk

[0008] The anti-running equipment such as iron shoes is heavy in weight, which is inconvenient to carry and place, resulting in high labor intensity of the operator.

[0009] During the operation process, if the operation is improper or careless, it is easy to cause safety accidents, such as accidental movement of the vehicle and injury of the personnel.

[0010] 3. Easily affected by human factors

[0011] The effect of manual anti-running operation is largely dependent on the skill level and responsibility of the operator. If the operator is not skilled or responsible, it may lead to problems such as incomplete anti-running measures or missing removal.

[0012] In addition, the uncertainty of manual operation also increases the risk of anti-running operation.

[0013] 4. Relatively low efficiency

[0014] Compared with automatic anti-running equipment, the efficiency of manual anti-running operation is relatively low. In the case of needing to quickly complete a large amount of anti-running operation, it may not be able to meet the operation demand.

[0015] In addition, some existing vehicles on the freight vehicle are equipped with automatic parking devices, which can solve some problems of manual anti-slip, but need to additionally increase a set of complex installation connection mechanism, each type of vehicle is different, the installation connection mechanism needs to be customized, the installation occupies a large space, the structure is complex, and the cost is high. Content of the utility model

[0016] The purpose of the present application is to provide an automatic parking brake cylinder for railway vehicles, which is designed by integrating braking and parking functions, has a simple and compact structure, can avoid the complex connection structure design in the existing braking and parking, and ensures that the braking and parking functions do not affect and interfere with each other through the sawtooth shape design of the pawl row and the ratchet row. The utility model has the beneficial effects that the automatic parking brake cylinder can realize the functions of driving brake and automatic parking, has a manual parking release function in case of failure, has a parking state display function, is convenient for vehicle parking maintenance and inspection, ensures that the driving brake and the parking do not affect each other through the sawtooth structure design, has a simple structure, occupies a small space in overall installation, has low installation cost, short installation time, good universality, simple production implementation, and low manufacturing cost.

[0017] To solve the technical problems of complicated manual anti-slip operation, high labor intensity, long time consumption, low efficiency, complex structure of the automatic parking device, and high cost in the prior art, the present application provides an automatic parking brake cylinder for railway vehicles, which comprises a cylinder body and a parking main body mounting block.

[0018] The rear end of the cylinder body is provided with a brake air inlet pipe, and the front end cover is provided with a cylinder cover. A piston a is installed in the cylinder body. The front end of the piston a is connected with a piston rod. The piston rod penetrates through the cylinder cover and is provided with a fork-shaped push rod at the front end thereof. The front end of the fork-shaped push rod is connected with a basic brake device. A relief spring is sleeved on the piston rod and clamped between the cylinder cover and the piston a.

[0019] The parking main body mounting block comprises a pawl row and a clutch mechanism. The parking main body mounting block is sleeved on the piston rod. The matching surface of the piston rod and the parking main body mounting block is provided with a ratchet row. The rear end of the parking main body mounting block is connected to the front end of the cylinder cover. The pawl row is installed on the inner side of the parking main body mounting block. The clutch mechanism is installed on the parking main body mounting block and used for controlling the opening and closing of the pawl row and the ratchet row.

[0020] Further, the present application provides an automatic parking brake cylinder for railway vehicles, which further comprises a manual relief mechanism. The manual relief mechanism is arranged on the parking main body mounting block and used for manually controlling the opening and closing of the pawl row and the ratchet row.

[0021] Further, the application provides an automatic parking brake cylinder for a railway vehicle, wherein the manual release mechanism comprises a handle, a cam rotating shaft and a connecting block, the connecting block is connected to the pawl row, the outer end of the cam rotating shaft is connected to the handle, the inner end of the cam rotating shaft penetrates through the parking body mounting block and is connected to the connecting block.

[0022] Further, the application provides an automatic parking brake cylinder for a railway vehicle, wherein a handle limiting sleeve is further included, the handle limiting sleeve is sleeved on the cam rotating shaft, a handle limiting sleeve spring is compressed and assembled between the inner end surface of the handle limiting sleeve and the outer wall of the parking body mounting block, a handle groove is formed on the outer end surface of the handle limiting sleeve, and the handle is clamped in the handle groove under the action of the limiting sleeve spring.

[0023] Further, the application provides an automatic parking brake cylinder for a railway vehicle, wherein the clutch mechanism comprises a pawl spring, a linkage structure and an action structure; the pawl spring is compressed and assembled between the parking body mounting block and the pawl row, the pawl row is biased towards the ratchet row under the action force of the pawl spring; the linkage structure is installed between the pawl row and the action structure; the action structure is installed on the parking body mounting block and is used for applying force to the pawl row through the linkage structure.

[0024] Further, the application provides an automatic parking brake cylinder for a railway vehicle, wherein the action structure comprises a power cavity cover, the power cavity cover covers the bottom of the parking body mounting block, a brake main pipe air inlet is formed on the bottom of the power cavity cover, a piston b is arranged in the inner cavity of the power cavity cover, and the upper end of the piston b is connected to the linkage structure.

[0025] Further, the application provides an automatic parking brake cylinder for a railway vehicle, wherein the linkage structure comprises two horizontal rods and two vertical rods; one of the horizontal rods transversely penetrates the pawl row, the other horizontal rod is transversely connected to the piston b, and the two vertical rods are respectively connected to the two ends of the two horizontal rods to form a frame shape.

[0026] Further, the application provides an automatic parking brake cylinder for a railway vehicle, wherein a parking state display board is further included, the parking state display board comprises a display baffle and a zebra color sheet, the zebra color sheet is connected to the end of the horizontal rod, the zebra color sheet is red and green alternately, and the display baffle is sleeved on the outer side of the zebra color sheet and is fixed to the parking body mounting block.

[0027] Further, the application provides an automatic parking brake cylinder for a railway vehicle, wherein the piston rod is axially provided with a counterbore, the rear end of the fork push rod is inserted into the counterbore, the rear section of the fork push rod is sleeved with a reset spring, the inner wall of the counterbore is provided with a spring seat a, the rear section of the fork push rod is provided with a spring seat b, and the reset spring is installed between the spring seat a and the spring seat b.

[0028] Compared with the prior art, the application has the following advantages: the brake and parking functions are integrated, the structure is simple and compact, the complex connection structure design in the existing brake and parking can be avoided, the sawtooth shape design of the pawl row and the ratchet row ensures that the brake and parking functions do not affect and interfere with each other, the automatic parking brake cylinder for a railway vehicle has the advantages that the driving brake and automatic parking functions can be realized, the manual parking release function is provided in the fault condition, the parking state display function is also provided, the vehicle parking maintenance and inspection are facilitated, the sawtooth structure design ensures that the driving brake and parking do not affect each other, the structure is simple, the overall installation occupies a small space, the installation cost is low, the time is short, the universality is good, the production is simple to realize, and the manufacturing cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the automatic parking brake cylinder for a railway vehicle.

[0030] Figure 2 It is an internal structural schematic diagram of the automatic parking brake cylinder for a railway vehicle.

[0031] Figure 3 In Figure 1 A-A sectional view.

[0032] 1, cylinder body; 2, piston a; 3, parking main body mounting block; 4, cross rod; 5, spring cover; 6, pawl spring; 7, pawl row; 8, piston rod; 9, spring seat a; 10, reset spring; 11, piston b; 12, power cavity cover; 13, cylinder cover; 14, fork push rod; 15, spring seat b; 16, relief spring; 17, vertical rod; 18, connecting block; 19, cam rotating shaft; 20, supporting block; 21, cover A; 22, limiting sleeve spring; 23, handle limiting sleeve; 24, handle; 25, cover B; 26, display stopper; 27, zebra color sheet; 28, brake air inlet pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] The following describes in detail the specific implementation of the present invention with reference to the accompanying drawings, and further illustrates the technical effects that can be achieved by the present invention.

[0037] like Figures 1 to 3 As shown, this embodiment provides an automatic parking brake cylinder for railway vehicles, which includes a cylinder body 1 and a parking body mounting block 3;

[0038] The cylinder body 1 rear end is provided with brake intake pipe 28, the front end cover is provided with cylinder cover 13, the cylinder body 1 is installed with piston a2, the piston a2 front end is connected with piston rod 8, the piston rod 8 penetrates the cylinder cover 13 and is provided with fork push rod 14 at the front end, the fork push rod 14 front end is connected with basic brake device, the piston rod 8 is sleeved with relief spring 16, and the relief spring 16 is clamped between the cylinder cover 13 and the piston a2;The piston rod 8 is axially provided with a counterbore, the fork push rod 14 rear end is inserted into the counterbore, the fork push rod 14 rear segment is sleeved with reset spring 10, the counterbore inner wall is provided with spring seat a9, and the fork push rod 14 rear segment is provided with spring seat b15, and the reset spring 10 is installed between the spring seat a9 and the spring seat b15;

[0039] The parking body mounting block 3 includes a pawl row 7 and a clutch mechanism;The parking body mounting block 3 is sleeved on the piston rod 8, the cooperation surface of the piston rod 8 and the parking body mounting block 3 is provided with a ratchet row, and the rear end of the parking body mounting block 3 is connected to the front end of the cylinder cover 13;The pawl row 7 is installed on the inner side of the parking body mounting block 3;The clutch mechanism is installed on the parking body mounting block 3, and is used for controlling the opening and closing of the pawl row 7 and the ratchet row.

[0040] The embodiment also designs a manual release parking function in a fault condition, and the manual relief mechanism is arranged in the parking body mounting block 3 and is used for manually controlling the opening and closing of the pawl row 7 and the ratchet row;Wherein, the manual relief mechanism includes handle 24, cam shaft 19 and connecting block 18, the connecting block 18 is connected to the pawl row 7, the outer end of the cam shaft 19 is connected with the handle 24, the inner end penetrates the parking body mounting block 3 and is connected with the connecting block 18;It also includes handle 24 limiting sleeve 23, the handle 24 limiting sleeve 23 is sleeved on the cam shaft 19, the inner end face of the handle 24 limiting sleeve 23 and the outer wall of the parking body mounting block 3 are compressed and assembled with limiting sleeve spring 22, the outer end face of the handle 24 limiting sleeve 23 is provided with handle 24 slot, and the handle 24 is clamped in the handle 24 slot under the action of the limiting sleeve spring 22.

[0041] The clutching mechanism comprises a pawl spring 6, a linkage structure and an acting structure. The pawl spring 6 is compressed and assembled between the parking main body mounting block 3 and the pawl row 7, the pawl row 7 is biased towards the direction of the ratchet row under the action of the pawl spring 6, the linkage structure is installed between the pawl row 7 and the acting structure, and the acting structure is installed on the parking main body mounting block 3 and used for applying force to the pawl row 7 through the linkage structure. The acting structure comprises a power cavity cover 12, the power cavity cover 12 covers the bottom of the parking main body mounting block 3, the bottom of the power cavity cover 12 is provided with a brake main pipe air inlet, a piston b11 is arranged in the inner cavity of the power cavity cover 12, and the upper end of the piston b11 is connected with the linkage structure. The linkage structure comprises two cross rods 4 and two longitudinal rods 17. One cross rod 4 traverses the pawl row 7, the other cross rod 4 is transversely connected with the piston b11, and the two longitudinal rods 17 are connected with the two ends of the two cross rods 4 respectively to form a frame shape.

[0042] In order to facilitate observation, the embodiment also designs a parking state display board, the parking state display board comprises a display baffle 26 and a zebra stripe 27, the zebra stripe 27 is connected with the end of the cross rod 4, the zebra stripe 27 is red and green alternately, the display baffle 26 is arranged outside the zebra stripe 27 and fixed on the parking main body mounting block 3, the zebra stripe 27 moves with the cross rod 4, and the opening and closing state of the clutching mechanism is displayed, that is, the parking or release state is displayed.

[0043] The working process and principle of the automatic parking brake cylinder for the railway vehicle provided by the embodiment are as follows: the device comprises a cylinder body 1, a cylinder cover 13 and a parking main body mounting block 3, the cylinder body 1 and the cylinder cover 13 are connected through bolts, the front end of the cylinder cover 13 is connected with the parking main body mounting block 3 through bolts, the piston a2 is installed in the cylinder body 1, the piston a2 is connected with the piston rod 8 (rivet fixed), the front end of the piston rod 8 penetrates through the parking main body mounting block 3 and can move axially in the parking main body mounting block 3, the fork-shaped push rod 14 with a certain degree of freedom is arranged in the piston rod 8, the spring seat a9 is installed at the front end in the piston rod 8, the spring seat b15 is arranged at the rear end of the fork-shaped push rod 14, and the reset spring 10 of the fork-shaped push rod 14 is installed between the spring seat a9 and the spring seat b15.

[0044] The brake air inlet pipe 28 is arranged at the rear end of the cylinder body 1, the brake pipe pressure enters through the brake air inlet pipe 28 during driving brake, the push rod piston a2 drives the piston rod 8 and the fork-shaped push rod 14 to move forward, so that the basic brake device connected with the fork-shaped push rod 14 applies brake, and the vehicle is slowed down or parked.

[0045] The pawl row 7 is installed above the parking body mounting block 3, the pawl spring 6 is installed at the upper end of the pawl row 7, the spring cover 5 is installed at the upper end of the pawl spring 6, the lower end of the parking body mounting block 3 is connected with the power cavity cover 12 through a bolt, the piston b11 is installed between the two, the upper end surface of the piston b11 is in contact with the plane of the horizontal rod 4, another horizontal rod 4 penetrates the middle of the pawl row 7, the two horizontal rods 4 are connected through the two vertical rods 17, the two vertical rods 17 penetrate the guide hole of the parking body mounting block 3, so as to realize the linkage of the pawl row 7 and the piston b11;

[0046] The ratchet row is arranged on the cooperation surface of the piston rod 8 and the pawl row 7, it is need to be explained that the structure of the pawl row 7 and the ratchet row in the embodiment is similar to the ratchet structure, the pawl row 7 and the ratchet row are both arranged by a row of sawtooth which cooperate with each other, the shape of the sawtooth is one bevel and one straight edge, and the two cooperate with each other; when the train starts to brake, the piston pushes the piston rod 8 to move forward and stretch out, the tooth bevel of the ratchet row can push the tooth bevel of the pawl row 7, the pawl row 7 moves upward, so even if the automatic parking is applied when the brake pipe is rapidly emptied, the train braking is not completely applied, it can still ensure that the train braking is not affected, the traditional automatic parking device needs to be set in the way of time delay air cylinder, otherwise the emergency braking cannot be applied after the parking is applied in the emergency braking; the above meshing structure makes the piston rod 8 move forward in the braking direction and prevent it from retreating, so as to ensure that the parking application does not affect the normal train braking;

[0047] The power cavity cover 12 is installed and arranged with the brake pipe air inlet, the brake pipe enters the lower end of the piston b11 through the inlet as the signal pressure, drives the piston b11 to drive the lower end horizontal rod 4, the two vertical rods 17 and the upper end horizontal rod 4 upward, the upper end horizontal rod 4 drives the pawl row 7 to overcome the force of the pawl spring 6, so that the pawl row 7 and the ratchet row on the piston rod 8 are disengaged, the piston rod 8 can freely move forward and backward, and the vehicle automatic parking is released; when the brake pipe is emptied, the pressure of the lower end of the piston b11 is removed, the pawl row 7 is pushed to the piston rod 8 direction under the action of the pawl spring 6, so that the pawl row 7 and the ratchet row on the piston rod 8 are engaged, so that the piston rod 8 can only move forward in the train braking direction, so that even if the train braking leaks, the vertical edge of the sawtooth can prevent the piston rod 8 from retreating, so as to maintain the braking force of the foundation brake, and realize the automatic parking of the vehicle after parking;

[0048] The embodiment is further provided with a manual relief mechanism, which comprises a cam rotating shaft 19, a connecting block 18, a supporting block 20, a cover A 21, a cover B 25, a handle 24 limiting sleeve 23 and the handle 24, the connecting block 18 is connected through the bolt and the pawl row 7, the cover A 21 and the cover B 25 are connected to the parking main body mounting block 3 through the bolt, the supporting block 20 is fixed to the spring cover 5 through the bolt, the right side of the cam rotating shaft 19 penetrates through the supporting block 20 and can rotate therein, the left side eccentric cam of the cam rotating shaft 19 is inserted into the waist-shaped slot of the connecting block 18, when the cam rotating shaft 19 is rotated through the handle 24, the eccentric cam on the cam rotating shaft 19 drives the connecting block 18 and the related pawl row 7 to move upwards, so that the engagement between the pawl row 7 and the ratchet row is disengaged, and the manual parking relief function is realized;

[0049] The handle 24 limiting sleeve 23 and the limiting sleeve spring 22 are arranged on the right end of the cam rotating shaft 19 and the left end surface of the handle 24, the handle 24 limiting sleeve 23 is guided and limited between the cover and the handle 24, and can only move along the axial direction of the cam shaft, when the vehicle is adjusted or temporarily moved under the condition of no wind, the handle 24 limiting sleeve 23 can be pressed until the rotation limitation of the handle 24 is released, the handle 24 is rotated, the cam rotating shaft 19 is rotated, the connecting block 18 is lifted by the cam, the pawl row 7 is driven to move upwards and disengaged, and the manual parking relief function is realized; the rotation angle of the handle 24 can be adjusted to 180° or 90° according to habit, and only the size of the cam needs to be changed; under normal circumstances, the handle 24 limiting sleeve 23 is clamped against the handle 24 by the limiting sleeve spring 22, and the handle 24 limiting sleeve 23 can limit the free rotation of the handle 24, thereby playing the role of safety; if the angle of the handle 24 after rotation is maintained after the manual relief, the handle 24 limiting sleeve 23 is released, and the automatic parking function can be isolated; the handle 24 is rotated back to the original position, and the state of the wind pressure control automatic parking and relief of the brake main pipe is restored.

[0050] The utility model further has the parking state display function, including display baffle 26 and zebra color piece 27, zebra color piece 27 is connected with horizontal rod 4 end part, can move together up and down, moving distance L, zebra color piece 27 is coated with red and green color alternately, and the color band width is also L, outside is equipped with fixed display baffle 26, display baffle 26 is with transparent interval strip, and transparent strip width L, interval gray color block width is also L, like this can see the color of zebra color piece 27 in the transparent part, and red is the parking state, and green is the relief state.

[0051] The utility model is not detailed, and it is the known technology of the person skilled in the art.

[0052] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative work according to the concept of the present application. Therefore, any technical solutions obtained by logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. An automatic parking brake cylinder for a railway vehicle, characterized by, The parking body mounting block comprises a ratchet gear and a clutch mechanism; the parking body mounting block is sleeved on the piston rod, and a ratchet gear is arranged on the cooperation surface of the piston rod and the parking body mounting block; the rear end of the parking body mounting block is connected to the front end of the cylinder cover; the ratchet gear is arranged on the inner side of the parking body mounting block; and the clutch mechanism is arranged on the parking body mounting block and used for controlling the opening and closing of the ratchet gear and the ratchet gear. The manual relief mechanism is arranged on the parking body mounting block and used for manually controlling the opening and closing of the ratchet gear and the ratchet gear. The manual relief mechanism comprises a handle, a cam rotating shaft and a connecting block; the connecting block is connected to the ratchet gear; the outer end of the cam rotating shaft is connected to the handle, and the inner end of the cam rotating shaft penetrates through the parking body mounting block and is connected to the connecting block.

2. The automatic parking brake cylinder for a railway vehicle according to claim 1, characterized by The handle limiting sleeve is sleeved on the cam rotating shaft; a limiting sleeve spring is compressed and assembled between the inner end surface of the handle limiting sleeve and the outer wall of the parking body mounting block; and a handle groove is arranged on the outer end surface of the handle limiting sleeve, and the handle is clamped in the handle groove under the action of the limiting sleeve spring.

3. The automatic parking brake cylinder for a railway vehicle according to claim 2, characterized in that, The clutch mechanism comprises a ratchet spring, a linkage structure and an action structure; the ratchet spring is compressed and assembled between the parking body mounting block and the ratchet gear; the ratchet gear is biased towards the ratchet gear under the action force of the ratchet spring; the linkage structure is arranged between the ratchet gear and the action structure; and the action structure is arranged on the parking body mounting block and used for applying force to the ratchet gear through the linkage structure.

4. The automatic parking brake cylinder for a railway vehicle according to claim 3, characterized by The action structure comprises a power cavity cover; the power cavity cover covers the bottom of the parking body mounting block; a brake main pipe air inlet is arranged on the bottom of the power cavity cover; a piston b is arranged in the inner cavity of the power cavity cover; and the upper end of the piston b is connected to the linkage structure.

5. The automatic parking brake cylinder for a railway vehicle according to claim 1, characterized by, The linkage structure comprises two horizontal rods and two vertical rods; one horizontal rod crosses the ratchet gear, the other horizontal rod is transversely connected to the piston b, and the two vertical rods are connected to the two ends of the two horizontal rods to form a frame shape.

6. The automatic parking brake cylinder for a railway vehicle according to claim 5, characterized in that, The parking state display board comprises a display baffle and a zebra color sheet; the zebra color sheet is connected to the end of the horizontal rod; the zebra color sheet is red and green alternately; the display baffle is arranged on the outer side of the zebra color sheet and fixed to the parking body mounting block; the zebra color sheet moves with the horizontal rod and displays the opening and closing state of the clutch structure, that is, displays the parking or release state.

7. The automatic parking brake cylinder for a railway vehicle according to claim 6, characterized in that, ​ 8. The automatic parking brake cylinder for a railway vehicle according to claim 7, characterized in that, ​ 9. The automatic parking brake cylinder for a railway vehicle according to claim 1, characterized by, The piston rod is axially provided with a counterbore, the fork push rod rear end is inserted into the counterbore, the fork push rod rear section is sleeved with a reset spring, the counterbore inner wall is provided with a spring seat a, the fork push rod rear section is provided with a spring seat b, and the reset spring is installed between the spring seat a and the spring seat b.

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