Shock pad detection tooling structure

Abstract

The utility model relates to the technical field of maglev train braking system detection, and proposes a damping pad detection tool structure, which comprises a bottom plate and a measured damping pad and further comprises: a supporting mechanism fixedly assembled on the bottom plate; a loading mechanism fixedly assembled on the supporting mechanism and used for applying a simulated vertical load of train drop; a fixing mechanism used for fixing the measured damping pad and enabling the inner core part and the shell of the measured damping pad to relatively move when the vertical load is applied; and a limiting mechanism controlling the compression stroke of the loading mechanism on the fixing mechanism to be 10mm to match the train drop limit working condition. The utility model completely simulates the force action of train drop on the damping pad, so that the quality of the damping pad can be detected through testing, the quality of the damping pad in the same batch is ensured to meet the use requirement, and the normal operation of the maglev train is ensured.

Description

Technical Field

[0001] This utility model relates to the field of testing technology for maglev train braking systems, specifically to a testing fixture structure for shock absorber pads. Background Technology

[0002] The brake caliper is the basic braking actuator of a medium- and low-speed maglev train. Simultaneously, the shock-absorbing pads on the brake caliper bear the cushioning force when the maglev train disembarks, and their cushioning performance and service life have always been key design considerations. Therefore, fatigue life testing of the shock-absorbing pads is particularly important, and designing a simple shock-absorbing pad testing fixture is essential.

[0003] The quality control of existing shock-absorbing pads relies solely on the technical processes of the manufacturing plants. Incoming materials are only inspected for appearance and dimensions, resulting in highly unstable product quality. The rubber of the shock-absorbing pads often separates from the outer shell, which seriously affects the stability of the maglev train when it is put into use, causing passengers to have an extremely uncomfortable experience. Utility Model Content

[0004] This utility model proposes a testing fixture structure for shock-absorbing pads, which solves the problem in the prior art where the quality control of shock-absorbing pads relies solely on the technical processes of the manufacturer, and the lack of standardized testing fixtures leads to highly unstable quality.

[0005] The technical solution of this utility model is as follows: a shock-absorbing pad testing fixture structure, including a base plate and the shock-absorbing pad to be tested, and further including:

[0006] The support mechanism is fixedly assembled on the base plate;

[0007] The loading mechanism, fixedly mounted on the support mechanism, is used to apply the vertical load simulating a vehicle falling.

[0008] The fixing mechanism is used to fix the test damping pad and can separate the inner core of the test damping pad from the outer shell to allow relative movement when a vertical load is applied;

[0009] The limiting mechanism controls the compression stroke of the loading mechanism against the fixing mechanism to be 10mm to match the extreme working conditions of train unloading.

[0010] Preferably, the support mechanism includes a support plate and four support rods. The lower ends of the four support rods are threaded onto the base plate. The support plate has holes corresponding to the four support rods. The support plate is installed on the upper ends of the four support rods through the four holes and is fastened to the fixing nut by the first washer.

[0011] Preferably, the loading mechanism includes a hydraulic cylinder and a support ring. The support plate has a through-type stepped hole at its center. The support ring is installed in the hole of the support plate and is axially fixed to the stepped hole of the support plate by a round nut.

[0012] Preferably, the fixing mechanism includes a shock-absorbing pad mounting plate, and the shock-absorbing pad mounting plate has a placement hole for accommodating the shock-absorbing pad to be tested.

[0013] Preferably, the cylinder is a single-acting hydraulic cylinder, which pushes the piston rod by applying pressure through the oil inlet, and returns to its original position by relying on the built-in spring after depressurization. When the piston rod of the cylinder extends, it pushes the shock-absorbing pad mounting plate.

[0014] Preferably, the base plate has a groove for placing the shock-absorbing pad mounting plate, and the contact surface between the lower end of the shock-absorbing pad mounting plate and the groove is the termination criterion for fatigue testing.

[0015] Preferably, the limiting mechanism includes a shaft and two shaft bases. The two shaft bases are provided with axially arranged semi-circular arc grooves. The two ends of the shaft pass through the inner hole of the damping pad being tested and are respectively placed in the semi-circular arc grooves of the two shaft bases. Each of the two shaft bases is provided with a shaft cover, and the shaft cover is installed on the shaft base by a second washer and a first screw to press the two ends of the shaft.

[0016] Preferably, the shock-absorbing pad mounting plate has slidably connected limit blocks on both sides, and the limit blocks are fixed to the base plate by second screws.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention fully simulates the force exerted by a train falling onto the shock-absorbing pad, allowing the quality of the shock-absorbing pad to be tested and ensuring that the quality of shock-absorbing pads installed in the same batch meets the usage requirements, thus providing a guarantee for the normal operation of the maglev train. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a three-dimensional schematic diagram of the shock-absorbing pad testing fixture structure proposed in this utility model;

[0021] Figure 2 This is a front view schematic diagram of the shock-absorbing pad testing fixture structure proposed in this utility model;

[0022] Figure 3 This is a side view of the shock-absorbing pad testing fixture structure proposed in this utility model;

[0023] Figure 4 This is a top view schematic diagram of the shock-absorbing pad testing fixture structure proposed in this utility model;

[0024] In the diagram: 1. Hydraulic cylinder; 2. Support ring; 3. Fixing nut; 4. First washer; 5. Support plate; 6. Support rod; 7. Shaft base; 8. Shaft; 9. Second washer; 10. First screw; 11. Shaft cover; 12. Second screw; 13. Limiting block; 14. Base plate; 15. Vibration damping pad mounting plate; 16. Round nut; 17. Vibration damping pad under test; 18. Groove. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0026] Please see Figures 1-4 This utility model provides a technical solution: a shock absorber testing fixture structure, including a base plate 14 and a shock absorber 17 to be tested, a support mechanism fixedly mounted on the base plate 14, a loading mechanism fixedly mounted on the support mechanism for applying a vertical load simulating a train drop, a fixing mechanism for fixing the shock absorber 17 to be tested and for separating the inner core and outer shell of the shock absorber 17 to allow relative movement when the vertical load is applied, and a limiting mechanism for controlling the compression stroke of the loading mechanism on the fixing mechanism to be 10mm to match the extreme working conditions of train drop.

[0027] Furthermore, the support mechanism includes a support plate 5 and four support rods 6. The lower ends of the four support rods 6 are threaded onto the base plate 14. The support plate 5 has holes corresponding to the four support rods 6. The support plate 5 is installed on the upper end of the four support rods 6 through the four holes and is fastened to the fixing nut 3 through the first washer 4. The base plate 14 is connected by threads of the four support rods 6, and the support plate 5 is installed on the upper end through the holes. The first washer 4 and the fixing nut 3 provide a stable fastening. This design ensures the stability of the overall structure and the load transmission path.

[0028] Furthermore, the loading mechanism includes a hydraulic cylinder 1 and a support ring 2. A through-type stepped hole is opened in the center of the support plate 5. The support ring 2 is installed in the hole of the support plate 5 and is axially fixed to the stepped hole of the support plate 5 by a round nut 16. A single-acting hydraulic cylinder 1 is used as the power source and is fixed by the support ring 2 and the round nut 16. The hydraulic drive method can precisely control the pressure and loading rate. The built-in spring reset design simplifies the system complexity.

[0029] Furthermore, the fixing mechanism includes a shock-absorbing pad mounting plate 15, which has a placement hole for accommodating the shock-absorbing pad 17 to be tested. Limiting blocks 13 are slidably connected to both sides of the shock-absorbing pad mounting plate 15, and the limiting blocks 13 are fixed to the base plate 14 by the second screw 12.

[0030] Furthermore, the cylinder 1 is a single-acting hydraulic cylinder. It pressurizes the piston rod through the oil inlet and resets it by the built-in spring after depressurization. When the piston rod of the cylinder 1 extends, it pushes the shock absorber mounting plate 15. The shock absorber mounting plate 15 is provided with a special placement hole to accommodate the shock absorber 17 to be tested. The limit blocks 13 on both sides are fixed in position by the second screw 12 to realize the sliding guidance of the shock absorber mounting plate 15.

[0031] Furthermore, the base plate 14 has a groove 18 for placing the shock-absorbing pad mounting plate 15. The contact surface between the lower end of the shock-absorbing pad mounting plate 15 and the groove 18 is the termination criterion for fatigue testing.

[0032] Furthermore, the limiting mechanism includes a shaft 8 and two shaft bases 7. The two shaft bases 7 are provided with axially arranged semi-circular arc grooves. The two ends of the shaft 8 pass through the inner hole of the damping pad 17 to be tested and are respectively placed in the semi-circular arc grooves of the two shaft bases 7. Each of the two shaft bases 7 is provided with a shaft cover 11, and the shaft cover 11 is installed on the shaft base 7 by a second washer 9 and a first screw 10 to press the two ends of the shaft 8. The shaft 8 passes through the inner hole of the damping pad 17 to be tested, and the two ends are fixed by the shaft base 7 and the shaft cover 11. The semi-circular arc grooves limit its displacement, and the second washer 9 and the first screw 10 ensure the reliability of the fixation.

[0033] The working principle and usage process of this utility model are as follows: The hydraulic cylinder 1 is a single-acting cylinder. Hydraulic pressure pushes out the piston rod, and after pressure release, it returns to its original position using an internal reset spring. When hydraulic oil is introduced into the inlet of the hydraulic cylinder 1, the piston rod pushes out, pushing the shock absorber mounting plate 15 downwards. The shock absorber mounting plate 15 then pulls the outer shell of the tested shock absorber 17 downwards until the lower end of the mounting plate 15 touches the bottom of the groove in the base plate 14. The core of the tested shock absorber 17 is fixed on the shaft 8 and does not move downwards. Only the outer shell of the tested shock absorber 17, along with the rubber inner core, moves downwards. The groove 18 has a size of 10mm, which is exactly the limit size of 10mm for the maglev train's landing height of 8±2mm. When pressed down, the inner core of the tested shock absorber 17 remains stationary, while the outer shell and the internal rubber of the tested shock absorber 17 are pressed downwards, completely simulating the working state of the shock absorber when the train is landing. After the hydraulic cylinder 1 is depressurized, the tested shock absorber 17 returns to its initial state under the action of its internal rubber. By repeatedly pressurizing and depressurizing the hydraulic cylinder 1, the lifting and lowering action of the maglev train can be simulated, thus realizing the service life test of the shock absorber.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A shock-absorbing pad testing fixture structure, comprising a base plate (14) and a shock-absorbing pad to be tested (17), characterized in that, Also includes: The support mechanism is fixedly mounted on the base plate (14); The loading mechanism, fixedly mounted on the support mechanism, is used to apply the vertical load simulating a vehicle falling. A fixing mechanism is used to fix the test damping pad (17) and to separate the inner core of the test damping pad (17) from the outer shell for relative movement when a vertical load is applied; The limiting mechanism controls the compression stroke of the loading mechanism against the fixing mechanism to be 10mm to match the extreme working conditions of train unloading.

2. The shock-absorbing pad testing fixture structure according to claim 1, characterized in that, The support mechanism includes a support plate (5) and four support rods (6). The lower ends of the four support rods (6) are threaded onto the base plate (14). The support plate (5) has holes corresponding to the four support rods (6). The support plate (5) is installed on the upper ends of the four support rods (6) through the four holes and is fastened to the fixing nut (3) by the first washer (4).

3. The shock-absorbing pad testing fixture structure according to claim 2, characterized in that, The loading mechanism includes a hydraulic cylinder (1) and a support ring (2). The support plate (5) has a through-type stepped hole in the center. The support ring (2) is installed in the hole of the support plate (5) and is axially fixed to the stepped hole of the support plate (5) by a round nut (16).

4. The shock-absorbing pad testing fixture structure according to claim 3, characterized in that, The fixing mechanism includes a shock-absorbing pad mounting plate (15), which has a placement hole for accommodating the shock-absorbing pad (17) to be tested.

5. The shock-absorbing pad testing fixture structure according to claim 3, characterized in that, The oil cylinder (1) is a single-acting hydraulic cylinder. It pushes the piston rod by applying pressure through the oil inlet. After depressurization, it is reset by the built-in spring. When the piston rod of the oil cylinder (1) extends, it pushes the shock-absorbing pad mounting plate (15).

6. The shock-absorbing pad testing fixture structure according to claim 5, characterized in that, The base plate (14) has a groove (18) for placing the shock-absorbing pad mounting plate (15). The contact surface between the lower end of the shock-absorbing pad mounting plate (15) and the groove (18) is the termination criterion for fatigue testing.

7. The shock-absorbing pad testing fixture structure according to claim 1, characterized in that, The limiting mechanism includes a shaft (8) and two shaft bases (7). The two shaft bases (7) are provided with axially arranged semi-circular arc grooves. The two ends of the shaft (8) pass through the inner hole of the damping pad (17) to be tested and are respectively placed in the semi-circular arc grooves of the two shaft bases (7). The two shaft bases (7) are provided with shaft covers (11), and the shaft covers (11) are installed on the shaft bases (7) by the second washer (9) and the first screw (10) to press the two ends of the shaft (8).

8. The shock-absorbing pad testing fixture structure according to claim 4, characterized in that, The shock-absorbing pad mounting plate (15) has slidable limit blocks (13) on both sides, and the limit blocks (13) are fixed to the base plate (14) by the second screw (12).

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