A railway vehicle brake parts cycle test bench

Abstract

The present invention relates to the technical field of train brake testing, and specifically discloses a brake component cycle test bench for railway vehicles, comprising a base and a display, wherein the display is mounted at the right front corner of the upper surface of the base, a packaging mechanism is mounted in the middle of the upper surface of the base, a bracket is mounted on the upper surface of the base, and the bracket is located directly above the packaging mechanism, a gearbox is mounted in the middle of the front of the bracket, the gearbox is driven by an external motor to rotate the output shaft, a tachometer and a first rotating shaft are mounted at the front and rear ends of the output shaft of the gearbox, respectively, and the tachometer is electrically connected to the display, the tachometer measures the rotation speed of the first rotating shaft and displays it on the display, allowing testers to evaluate the braking effect by the vehicle speed on the display. This method realizes periodic automatic monitoring of the service life of the brake disc, avoids test errors caused by manual inspection lags, utilizes the residual heat of the brake disc to heat-melt seal the bag opening, eliminates the need for additional heating devices, and reduces energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of train brake testing, in particular to a brake component cycle test bench for railway vehicles. Background Art

[0002] The reliability of the braking system of railway trains (including trains, EMUs, high-speed trains, and other train-based transport vehicles) is directly related to operational safety. Currently, pneumatic brakes are widely used on trains. Their operating principle is that compressed air drives the brake cylinder piston, pushing the brake shoe / brake pad into contact with the brake disc, generating frictional braking force. This solution is widely used due to its high structural stability and low maintenance costs.

[0003] Before brakes leave the factory, they must be tested on a test bench to simulate actual braking conditions to verify their performance. Due to the significant inertia of trains during operation, strong friction must be generated between the brake disc and the brake to effectively stop the train. This causes the brake disc to gradually decrease in thickness due to continuous friction during testing. Existing technologies have the following drawbacks:

[0004] Brake disc wear monitoring lag: When the brake disc is worn to its service limit, if it is not replaced in time, the brake test results will be distorted due to the deviation of the braking distance, resulting in unnecessary measurement errors;

[0005] Low energy utilization: After qualified brakes are tested, they need to be packaged separately using a packaging machine to prevent contamination. However, traditional packaging methods do not utilize the residual heat of the brake disc after testing, resulting in energy waste and increased testing costs. Summary of the Invention

[0006] The purpose of the present invention is to provide a railway vehicle brake parts cycle test bench to at least solve the problems of the prior art that the brake disc cannot be replaced in time, affecting the brake test results, and the traditional packaging method wastes energy.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a railway vehicle brake component cycle test bench, comprising a base and a display, the display being mounted at the right front corner of the upper surface of the base, a packaging mechanism being mounted in the middle of the upper surface of the base, a bracket being mounted on the upper surface of the base, and the bracket being located directly above the packaging mechanism, a gearbox being mounted in the middle of the front face of the bracket, the output shaft of the gearbox being driven to rotate by an external motor, a speedometer and a first rotating shaft being mounted at the front and rear ends of the output shaft of the gearbox, respectively, and the speedometer being electrically connected to the display, the speedometer measuring the rotation speed of the first rotating shaft and displaying it on the display, allowing the tester to evaluate the braking effect through the vehicle speed on the display, a positioning plate being mounted on the rear side of the upper surface of the base, a thickness testing mechanism being mounted on the top of the positioning plate, a first gear and a brake disc being mounted on the front and rear sides of the outer wall of the first rotating shaft, respectively, the thickness testing mechanism regularly detecting the thickness of the brake disc, a support seat being mounted at the right rear side of the upper surface of the base, a brake for braking the brake disc being mounted on the upper surface of the support seat.

[0008] Preferably, the packaging mechanism includes a base installed on the upper surface of the base, a driver is installed in the inner cavity of the base, a moving seat is installed at the output end of the driver, a vertical plate and a first rack are installed in sequence from bottom to top on the front end of the upper surface of the moving seat, the first rack is meshed with the first gear, and when the moving seat moves left and right, the brake disc rotates through the first rack and the first gear, a support assembly is provided on the upper surface of the moving seat, and two left-right symmetrical extrusion rods are installed on the rear side of the upper surface of the moving seat.

[0009] Preferably, the inner side of the top of the extrusion rod is shaped as a downwardly inclined slope.

[0010] Preferably, the support assembly includes two guide rods plugged into the left and right sides of the vertical plate, the rear end of the guide rods is installed with a frame, guide slots are opened on the left and right sides of the frame, one end of a tension spring is clamped on the rear side of the frame, and the other end of the tension spring is clamped with the outer wall of the vertical plate, so that the frame is always limited by the tension of the tension spring, telescopic rods are installed at the four corners of the upper surface of the movable seat, a support platform is installed on the top of the telescopic rod, and pins plugged into the inner cavity of the guide slot are installed on the left and right sides of the support platform, two left and right opposite ear plates are installed on the rear side of the upper surface of the support platform, and a torsion spring is provided on the outer wall of the ear plate, and a pressure rod is plugged into the ear plate, so that the pressure rod is pressed against the upper surface of the support platform under the torsion of the torsion spring;

[0011] The guide groove and the latch cooperate to provide the support platform with an upward thrust, so that the support platform always fits with the brake disc. As the first rack and the first gear are driven, the brake disc rotates, and the packaging bag containing the brake is sealed.

[0012] Preferably, the guide groove is inclined from top to bottom toward front and downward.

[0013] Preferably, the thickness testing mechanism includes a box body mounted on the top of the positioning plate, an alarm mounted on the front of the box body, a cover plate mounted on the right side of the box body, second rotating shafts mounted on the front and rear sides of the cover plate through bearings, second gears and rocker arms mounted on the left and right ends of the second rotating shaft are respectively mounted, a cylinder is mounted on the top of the box body cavity, and the cylinder is externally connected to a timer to achieve timed start of the cylinder, a second rack meshed with the second gear is mounted on the output end of the cylinder, when the second rack moves up and down, the two second gears can be meshed and connected, so that the two rocker arms can swing inward or outward at the same time, a third gear meshed with the second gear is mounted on the top of the left inner wall of the box body through a pin shaft, a notch is opened on the side wall of the third gear, a travel switch electrically connected to the alarm is mounted on the top of the box body cavity, and the trigger end of the travel switch extends into the notch;

[0014] The second rack and the second gear are used to transmit the swing arm to the inside at the same time. The contact between the swing arm and the brake disc serves as a stop signal. If the rotation angle of the third gear exceeds the limit, the travel switch will be triggered to monitor the service life of the brake disc.

[0015] Preferably, the transmission ratio between the second gear and the third gear is less than 1.

[0016] Preferably, the two rocker arms are symmetrically arranged front to back relative to the center point of the brake disc.

[0017] Preferably, the second rack is driven by the second gear, and the rocker arm swings inward synchronously until the end contacts the surface of the brake disc. At this time, if the thickness of the brake disc is normal, the rocker arm stops moving and the second gear no longer rotates.

[0018] The present invention provides a railway vehicle brake component cycle test bench, which has the following beneficial effects:

[0019] 1. The present invention drives the second rack up and down through a cylinder, and allows the two rocker arms to move inward or outward simultaneously under the transmission condition of the second rack and the second gear. When the rocker arms contact the brake disc, the third gear triggers the travel switch as a measurement signal of the minimum thickness limit of the brake disc, causing the alarm to sound an alarm, regularly monitoring the service life of the brake disc to prevent the brake test results from being affected.

[0020] 2. The present invention drives the screw to rotate clockwise or counterclockwise through a motor, and under the limiting action of the slide bar, the screw pulls the moving seat to move left and right, and the tension spring provides forward traction for the frame. The support platform is raised through the cooperation of the guide groove and the pin, so that the packaging bag on the support platform is always in contact with the brake disc. Therefore, the first rack and the first gear transmission ensure the rotation of the brake disc, and the residual heat of the brake disc heat-melts and seals the bag opening of the packaging bag, thereby achieving the purpose of using the residual heat of the brake disc to seal the brake packaging bag, realizing energy recycling, and reducing the cost of brake testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the packaging mechanism structure;

[0023] Figure 3 Schematic diagram of the extruded rod structure;

[0024] Figure 4 Schematic diagram of the supporting component structure;

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is the exploded diagram of the thickness testing mechanism;

[0027] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0028] In the figure: 1. base; 2. display; 3. packaging mechanism; 4. bracket; 5. gear box; 6. speed meter; 7. first rotating shaft; 8. positioning plate; 9. thickness testing mechanism; 10. first gear; 11. brake disc; 12. support base; 13. brake; 31. base; 32. motor; 33. screw; 34. slide bar; 35. moving base; 36. vertical plate; 37. first rack; 38. support assembly; 39. extrusion Rod; 381, guide rod; 382, ​​frame; 383, guide groove; 384, tension spring; 385, telescopic rod; 386, support platform; 387, latch; 388, ear plate; 389, pressure rod; 91, box body; 92, alarm; 93, cover; 94, second rotating shaft; 95, second gear; 96, rocker arm; 97, cylinder; 98, second rack; 99, third gear; 910, notch; 911, limit switch. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0030] See also Figure 1-Figure 7The present invention provides a technical solution: a railway vehicle brake component cycle test bench, comprising a base 1 and a display 2, wherein the display 2 is mounted on the right front corner of the upper surface of the base 1, a packaging mechanism 3 is mounted in the middle of the upper surface of the base 1, a bracket 4 is mounted on the upper surface of the base 1, and the bracket 4 is located directly above the packaging mechanism 3, a gear box 5 is mounted in the middle of the front of the bracket 4, the gear box 5 is driven by an external motor to rotate the output shaft, a tachometer 6 and a first rotating shaft 7 are mounted at the front and rear ends of the output shaft of the gear box 5, respectively, and the tachometer 6 is electrically connected to the display 2, the tachometer 6 measures the rotation speed of the first rotating shaft 7 and displays it on the display. The speed of the vehicle is displayed on the device 2, so that the tester can evaluate the braking effect through the vehicle speed on the display 2. A positioning plate 8 rotatably connected to the first rotating shaft 7 is installed on the rear side of the upper surface of the base 1, and a thickness testing mechanism 9 is installed on the top of the positioning plate 8. The first gear 10 and the brake disc 11 are respectively installed on the front and rear sides of the outer wall of the first rotating shaft 7. The thickness testing mechanism 9 regularly detects the thickness of the brake disc 11 to prevent the service life of the brake disc 11 from expiring and affecting the test result of the brake disc 11. A support seat 12 is installed on the right rear of the upper surface of the base 1, and a brake 13 for braking the brake disc 11 is installed on the upper surface of the support seat 12.

[0031] As a preferred solution, further, the packaging mechanism 3 includes a base 31 installed on the upper surface of the base 1, a driver is installed in the inner cavity of the base 31, the driver includes a motor 32 installed at the front end of the right side wall of the base 31, one end of a screw 33 is installed at the output end of the motor 32, the other end of the screw 33 is rotatably installed with the left inner wall of the base 31, and a slide rod 34 is horizontally installed on the rear side of the inner cavity of the base 31.

[0032] The outer wall of the screw 33 is screwed to one side of the movable seat 35, and the other side of the movable seat 35 is sleeved with the outer wall of the slide bar 34. When the motor 32 drives the screw 33 to rotate clockwise or counterclockwise, the slide bar 34 limits the movable seat 35, and the screw thread rotation force can pull the movable seat 35 to move left and right. The front end of the upper surface of the movable seat 35 is sequentially installed with a vertical plate 36 and a first rack 37 from bottom to top. The first rack 37 is meshed with the first gear 10. When the movable seat 35 moves left and right, the brake disc 11 is rotated through the first rack 37 and the first gear 10. The residual heat on the brake disc 11 seals the packaging bag equipped with the brake 13 to prevent the brake 13 from being contaminated. A support assembly 38 is provided on the upper surface of the movable seat 35, and two left-right symmetrical extrusion rods 39 are installed on the rear side of the upper surface of the movable seat 35.

[0033] After the motor 32 is powered on, the screw 33 rotates to drive the movable seat 35 to move left, and the first rack 37 drives the first gear 10 to rotate counterclockwise, causing the brake disc 11 to rotate. At this time, the surface temperature of the brake disc 11 is utilized due to the test residue.

[0034] As a preferred solution, further, the inner side of the top of the extrusion rod 39 is shaped as a downward inclined surface, and the inclined surface of the extrusion rod 39 squeezes the pressure rod 389 upward, so that a gap is generated between the pressure rod 389 and the support platform 386, which facilitates the insertion of the bag mouth.

[0035] As a preferred solution, further, the support assembly 38 includes two guide rods 381 inserted on the left and right sides of the vertical plate 36, and a frame 382 is installed at the rear end of the guide rod 381. Guide grooves 383 are provided on the left and right sides of the frame 382. The guide grooves 383 are inclined from top to bottom to the front and bottom. When the frame 382 moves forward, the inclined surface of the guide groove 383 can squeeze the latch 387 upward, thereby moving the support platform 386 upward. One end of the tension spring 384 is clamped on the rear side of the frame 382, ​​and the other end of the tension spring 384 is clamped on the outer wall of the vertical plate 36, so that the frame 382 is always under the tension of the spring. 384 tension limit, telescopic rods 385 are installed at the four corners of the upper surface of the movable seat 35, and a support platform 386 is installed on the top of the telescopic rods 385. The telescopic rods 385 allow the support platform 386 to move vertically. Pins 387 that are plugged into the inner cavity of the guide groove 383 are installed on the left and right sides of the support platform 386. Two left and right opposite ear plates 388 are installed on the rear side of the upper surface of the support platform 386, and the outer wall of the ear plate 388 is provided with a torsion spring. A pressure rod 389 is inserted into the ear plate 388. Under the torsion force of the torsion spring, the pressure rod 389 is pressed tightly against the upper surface of the support platform 386;

[0036] Initial state: the tension spring 384 pulls the frame 382 to move forward, the latch 387 is located at the rear end of the guide groove 383, and the support platform 386 is at the highest height through the telescopic rod 385.

[0037] Positioning of packaging bag: Place the packaging bag of the brake 13 on the supporting platform 386, with the bag opening placed under the pressing rod 389. The torsion spring causes the pressing rod 389 to press the bag opening tightly to ensure that the bag opening is fixed.

[0038] Residual heat packaging: When the movable seat 35 moves to the left, the tension spring 384 pulls the frame 382 forward, and the inclined surface of the guide groove 383 pushes the pin 387 upward, so that the supporting platform 386 rises through the telescopic rod 385, ensuring that the packaging bag always fits the surface of the brake disc 11. When the brake disc 11 rotates, the residual heat melts and seals the bag opening.

[0039] Reset and cycle: After the packaging is completed, the motor 32 reverses and drives the movable seat 35 to move right and reset. The pressing rod 389 presses the supporting platform 386 again after the squeezing rod 39 is disengaged, waiting for the next packaging operation.

[0040] As a preferred solution, further, the thickness testing mechanism 9 includes a box body 91 installed on the top of the positioning plate 8, an alarm 92 is installed on the front of the box body 91, a cover plate 93 is installed on the right side of the box body 91, and a second rotating shaft 94 is installed on the front and rear sides of the cover plate 93 through bearings. A second gear 95 and a rocker arm 96 are installed on the left and right ends of the second rotating shaft 94 respectively. The two rocker arms 96 are symmetrically arranged front and back relative to the center point of the brake disc 11 to ensure that the rocker arm 96 can be simultaneously with the brake disc 11 to prevent inaccurate thickness measurement of the brake disc 11. A cylinder 97 is installed on the top of the inner cavity of the box body 91, and the cylinder 97 is externally connected to a timer to realize timed start of the cylinder 97. A second rack 98 meshing with the second gear 95 is installed on the output end of the cylinder 97. When the second rack 98 moves up and down When the second gears 95 are engaged, the two rocker arms 96 can be swung inward or outward at the same time. A third gear 99 engaged with the second gear 95 is installed on the top of the left inner wall of the box body 91 through a pin. The transmission ratio of the second gear 95 to the third gear 99 is less than 1. Since the wear of the brake disc 11 is small, the rotation angular velocity of the third gear 99 is increased, the detection signal is amplified, and the thickness measurement accuracy of the brake disc 11 is improved. A notch 910 is provided on the side wall of the third gear 99. A travel switch 911 electrically connected to the alarm 92 is installed on the top of the inner cavity of the box body 91. The trigger end of the travel switch 911 extends into the notch 910. The notch 910 provides an inaction space for the travel switch 911. Once the third gear 99 moves beyond the limit, the travel switch 911 will be triggered.

[0041] Timed start: The cylinder 97 is connected to an external timer. After the timer is triggered, the cylinder rod extends and drives the second rack 98 to move downward.

[0042] The rocker arm swings: the second rack 98 and the second gear 95 are driven, and the rocker arm 96 swings inward synchronously until the end contacts the surface of the brake disc 11. At this time, if the thickness of the brake disc 11 is normal, the rocker arm 96 stops moving and the second gear 95 stops rotating.

[0043] Wear monitoring: When the wear thickness of the brake disc 11 exceeds the limit (such as 3mm), the rocker arm 96 needs to swing at a larger angle to contact the brake disc 11, driving the second gear 95 to rotate at a larger angle. Through the transmission ratio amplification, the rotation angle of the third gear 99 increases and triggers the travel switch 911. The alarm 92 emits an audible and visual alarm, prompting the replacement of the brake disc 11.

[0044] Working principle: Step 1, the brake 13 is installed on the support base 12, and the pneumatic system is connected to the brake 13. The gear box 5 is rotated by the motor, and the first rotating shaft 7 drives the first gear 10 and the brake disc 11 to rotate, so that the speed of the brake disc 11 reaches the test standard of the brake 13. The pneumatic system increases the air pressure of the brake 13, and the brake 13 brakes the brake disc 11. The speed meter 6 measures the speed of the first rotating shaft 7 in real time and displays it on the display 2. The braking effect of the brake disc 11 is tested by the speed change;

[0045] Step 2: To test the brake 13 under standard conditions, the cylinder 97 is started at a fixed time. When the second rack 98 and the second gear 95 are in transmission, the two rocker arms 96 swing inward simultaneously. At the same time, the third gear 99 rotates until the rocker arm 96 contacts the outer wall of the brake disc 11. The second gear 95 stops moving. As the thickness of the brake disc 11 decreases, the rotation angle of the third gear 99 increases. Once the notch 910 disengages from the travel switch 911, the third gear 99 squeezes the travel switch 911 and triggers it. The alarm 92 sounds an alarm, indicating that the service life of the brake disc 11 has expired and is not suitable for use in the brake 13 test.

[0046] The third step is to package the qualified brake 13, and the brake 13 is placed on the support platform 386 after the packaging bag is put on. The inclined surface of the squeezing rod 39 squeezes the pressing rod 389 upward to create a gap between the pressing rod 389 and the support platform 386, and the bag opening is placed in the gap. The pressing rod 389 is used to press the bag opening so that the bag opening is positioned. The motor 32 drives the screw 33 to rotate clockwise or counterclockwise. The screw 33 thread rotation drives the movable seat 35 to move left and right. The tension spring 384 pulls the frame 382 forward, so that the inclined surface of the guide groove 383 always squeezes the pin 387 upward, so that the support platform 386 and the brake disc 11 are in stable contact. As the support platform 386 moves, the brake disc 11 rolls on the bag opening under the transmission of the first rack 37 and the first gear 10. The heat generated by the friction between the brake disc 11 and the brake 13 is used to realize the hot melt sealing of the packaging bag, and the brake 13 is packaged using the residual heat of the brake disc 11.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A railway vehicle brake component cycle test bench, comprising a base (1) and a display (2), wherein the display (2) is mounted on the right front corner of the upper surface of the base (1), and is characterized in that: A packaging mechanism (3) is installed in the middle of the upper surface of the base (1), a bracket (4) is installed on the upper surface of the base (1), and the bracket (4) is located directly above the packaging mechanism (3), a gear box (5) is installed in the middle of the front of the bracket (4), the gear box (5) is driven by an external motor to rotate the output shaft, a tachometer (6) and a first rotating shaft (7) are installed at the front and rear ends of the output shaft of the gear box (5), and the tachometer (6) is electrically connected to the display (2), and the tachometer (6) measures the rotation speed of the first rotating shaft (7) and displays it on the display (2), so that the tester can The braking effect is evaluated by the vehicle speed on the display (2), a positioning plate (8) rotatably connected to the first rotating shaft (7) is installed on the rear side of the upper surface of the base (1), a thickness testing mechanism (9) is installed on the top of the positioning plate (8), a first gear (10) and a brake disc (11) are installed on the front and rear sides of the outer wall of the first rotating shaft (7), the thickness testing mechanism (9) regularly detects the thickness of the brake disc (11), a support seat (12) is installed on the right rear side of the upper surface of the base (1), and a brake (13) for braking the brake disc (11) is installed on the upper surface of the support seat (12); The packaging mechanism (3) includes a base (31) mounted on the upper surface of the base (1), a driver is mounted in the inner cavity of the base (31), a movable seat (35) is mounted on the output end of the driver, a vertical plate (36) and a first rack (37) are mounted on the front end of the upper surface of the movable seat (35) from bottom to top, the first rack (37) is meshed with the first gear (10), and when the movable seat (35) moves left and right, the brake disc (11) is rotated by the first rack (37) and the first gear (10), a support assembly (38) is provided on the upper surface of the movable seat (35), and two left-right symmetrical extrusion rods (39) are mounted on the rear side of the upper surface of the movable seat (35); The support assembly (38) includes two guide rods (381) plugged into the left and right sides of the vertical plate (36), a frame (382) is installed at the rear end of the guide rod (381), and guide grooves (383) are provided on the left and right sides of the frame (382). One end of a tension spring (384) is clamped on the rear side of the frame (382), and the other end of the tension spring (384) is clamped on the outer wall of the vertical plate (36), so that the frame (382) is always limited by the tension of the tension spring (384). The four corners of the upper surface of the movable seat (35) are all equipped with telescopic springs. Rod (385), a support platform (386) is installed on the top of the telescopic rod (385), and pins (387) are installed on the left and right sides of the support platform (386) and are plugged into the inner cavity of the guide groove (383). Two left and right opposite ear plates (388) are installed on the rear side of the upper surface of the support platform (386), and a torsion spring is provided on the outer wall of the ear plate (388). A pressure rod (389) is plugged into the ear plate (388), and the pressure rod (389) is pressed against the upper surface of the support platform (386) under the torsion force of the torsion spring.

2. A railway vehicle brake component cycle test bench according to claim 1, characterized in that: The inner side of the top of the extrusion rod (39) is shaped as a downwardly inclined slope.

3. A railway vehicle brake component cycle test bench according to claim 2, characterized in that: The guide groove (383) is inclined from top to bottom toward the front and bottom.

4. A railway vehicle brake component cycle test bench according to claim 3, characterized in that: The thickness testing mechanism (9) comprises a box body (91) mounted on the top of the positioning plate (8), an alarm (92) is mounted on the front of the box body (91), a cover plate (93) is mounted on the right side of the box body (91), a second rotating shaft (94) is mounted on both the front and rear sides of the cover plate (93) through bearings, a second gear (95) and a rocker (96) are mounted on the left and right ends of the second rotating shaft (94), a cylinder (97) is mounted on the top of the inner cavity of the box body (91), and the cylinder (97) is externally connected to a timer to realize the timed start of the cylinder (97), and the output end of the cylinder (97) is equipped with a second gear (95) and a rocker (96) The second rack (98) is meshed with the two gears (95). When the second rack (98) moves up and down, the two second gears (95) can be meshed and connected, so that the two swing rods (96) can swing inward or outward at the same time. A third gear (99) meshed with the second gear (95) is installed on the top of the left inner wall of the box body (91) through a pin shaft. A notch (910) is opened on the side wall of the third gear (99). A travel switch (911) electrically connected to the alarm (92) is installed on the top of the inner cavity of the box body (91), and the trigger end of the travel switch (911) extends into the notch (910).

5. A railway vehicle brake component cycle test bench according to claim 4, characterized in that: The transmission ratio between the second gear (95) and the third gear (99) is less than 1.

6. A railway vehicle brake component cycle test bench according to claim 5, characterized in that: The two rocker arms (96) are symmetrically arranged front and back relative to the center point of the brake disc (11).

7. A railway vehicle brake component cycle test bench according to claim 6, characterized in that: The second rack (98) is driven by the second gear (95), and the swing rod (96) swings inward synchronously until the end contacts the surface of the brake disc (11). At this time, if the thickness of the brake disc (11) is normal, the swing rod (96) stops moving and the second gear (95) no longer rotates.

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