A brake pad wear testing device

Abstract

This invention relates to a testing device, specifically a brake pad wear testing device, belonging to the technical field of brake pad wear testing devices. It includes a temperature-controlled chamber with a lifting base plate inside. Above the lifting base plate is a ground roughness control frame, and above the ground roughness control frame is a test tire. A hub motor is embedded in the test tire. Brake pads to be tested are symmetrically arranged on both sides of the test tire. A central control display screen is installed on one inner wall of the temperature-controlled chamber. This device can simulate the rolling state of the test tire on the ground, improving the accuracy of testing the wear degree of the brake pads. Furthermore, this device can replace different simulated ground roughness plates to realize the wear degree of the brake pads under different road conditions. It can also test the wear degree of the brake pads under different temperatures and simulate the effect of natural temperature on the wear degree of the brake pads under different seasons, thereby improving the rationality of the device.

Description

Technical Field

[0001] This invention relates to a brake pad wear testing device, belonging to the technical field of brake pad wear testing devices. Background Technology

[0002] The automotive braking system, also known as the vehicle braking system, functions to: force a moving vehicle to decelerate or even stop as required by the driver; keep a stopped vehicle stable under various road conditions (including on slopes); and maintain a stable speed for a vehicle traveling downhill. Currently, most car manufacturers use a front disc and rear drum braking system on small and medium-sized finished vehicles, with some models using four-wheel disc brakes. Compared to drum brakes, disc brakes are more technologically advanced, lighter in weight, and have better heat dissipation, braking performance, and adaptability to complex weather and road conditions.

[0003] A testing device and its method for testing brake pad wear performance (application number: CN109142122B) includes a wheel hub, a brake test bench, and a control system. It also includes an operating platform, which comprises a support system and a functional system. The functional system includes a simulated ground component and a lifting device. The simulated ground component includes a simulated ground panel, fixing components, and adjusting components. The adjusting components include a limit ring, a connecting rod, a guide plate, and a threaded rod. The method of use involves: 1) pre-test preparation, and 2) test steps. The purpose of this invention is to address the shortcomings of existing technologies by providing a technical solution for testing brake pad wear performance and its method of use. This invention features a simple device, convenient operation, low manufacturing cost, and the ability to simulate various road conditions. It can test the wear of brake pads under various road conditions and environments, such as uphill, downhill, and flat surfaces, thereby ensuring the accuracy of the test results.

[0004] The existing devices described above can test the wear and tear of brake pads under various road conditions and environments, such as uphill, downhill, and flat surfaces, thus ensuring the accuracy of the test results. However, when measuring brake pads, these devices involve the tire rotating in place and rubbing against the ground, generating sliding friction. While this improves the accuracy of the measurement and the brake pads themselves, in normal vehicle operation, the tires are in a rolling state, generating rolling friction, which is much less than sliding friction. Therefore, to ensure the device's accuracy, the existing devices still have shortcomings. Furthermore, the road conditions may vary during braking, which can affect the brake pad testing results.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a brake pad wear testing device to solve the above-mentioned problems. This device can maximize the simulation of the state of a tire rolling on the ground, thereby improving the accuracy of the test of the brake pads under test. At the same time, by changing the simulated ground roughness plate, the wear degree of the brake pads under test can be detected under different roughness conditions. Due to the influence of temperature on the coefficient of friction, the wear degree of the brake pads under test can be detected at different temperatures by heating the brake pads under test with a heating plate. In addition, this device can also simulate the running state of the tire when it is rolling uphill, downhill and on a flat surface, thereby improving the rationality of this testing device.

[0007] The present invention achieves the above-mentioned objective through the following technical solution: a brake pad wear testing device, comprising a temperature-controlled chamber, a lifting base plate disposed inside the temperature-controlled chamber, a ground roughness control frame disposed above the lifting base plate, a test tire disposed above the ground roughness control frame, a hub motor embedded in the test tire, brake pads to be tested symmetrically disposed on both sides of the test tire, a central control display screen disposed on one inner wall of the temperature-controlled chamber, and a temperature sensor disposed on one inner wall of the temperature-controlled chamber.

[0008] Preferably, in order to limit one end of the lifting cylinder, the lifting base plate is installed on the inner bottom wall of the temperature control room, and stabilizing plates are symmetrically arranged at both ends of the upper surface of the lifting base plate. Stabilizing rods are fixedly installed between the stabilizing plates at the same end, and lifting cylinders are hinged to both ends of the stabilizing rods.

[0009] Preferably, in order to limit the other end of the lifting cylinder, fixed plates are symmetrically arranged at both ends of the lower surface of the rough control frame, and fixed rods are fixedly installed between the fixed plates at the same end. The fixed rods and the stabilizing rods are on the same vertical line, and the upper ends of the lifting cylinders are hinged to the fixed rods.

[0010] Preferably, in order to facilitate the limiting of the simulated ground roughness plate, a fixing groove is provided on both inner walls of the ground roughness control frame, and a simulated ground roughness plate is inserted into each fixing groove. The simulated ground roughness plate is in close contact with the inner wall of the ground roughness control frame and the inner wall of the fixing groove. A blocking frame is symmetrically provided on the outer surface of one end of the ground roughness control frame, and a blocking rod is inserted into the blocking frame. The upper side surface of the blocking rod is in close contact with the simulated ground roughness plate.

[0011] Preferably, in order to reduce the friction between the functional support plate and the stabilizing frame when the detection tire moves by means of the movable ball bearings, stabilizing frames are fixedly installed on both outer surfaces of the ground roughness control frame. A friction-reducing groove is opened on one inner wall of the stabilizing frame. A functional support plate is slidably installed in the friction-reducing groove. A ball bearing groove is opened at one end of the functional support plate. Movable balls are evenly arranged in the ball bearing groove. The movable balls are in contact with the friction-reducing inner wall.

[0012] Preferably, in order to fix the test tire by means of the fixing disc, a fixing disc is fixedly connected to one end of each functional support plate, the outer surface of the fixing disc is uniformly provided with fixing thread holes, the test tire is disposed between the fixing discs and both sides of the test tire are in contact with each other with the fixing disc.

[0013] Preferably, in order to extend and retract the caliper piston via the brake pump, an oil reservoir is provided on the upper surface of one end of the functional support frame, and a brake pump is installed inside the oil reservoir. A piston support frame is provided on the upper surface of one end of the functional support frame, and a caliper piston is bolted to the upper end of the piston support frame. The output end of the brake pump and the inlet end of the caliper piston are connected to each other via pipelines. One end of the caliper piston is fixedly connected to the brake pad under test, and a heating element is embedded in the brake pad under test.

[0014] Preferably, in order to control the temperature inside the temperature control room, a transparent acrylic panel is embedded in one outer wall of the temperature control room, a temperature control port is opened on one inner wall of the temperature control room, a temperature control heat insulation plug is installed in the temperature control port, and a temperature sensor is installed on one inner wall of the temperature control room.

[0015] The beneficial effects of this invention are: this device can simulate and detect the rolling state of a tire on the ground, improving the accuracy of detecting the wear degree of the brake pads under test. Furthermore, this device can replace different simulated rough ground plates to realize the wear degree of the brake pads under test under different road conditions. It can also detect the wear degree of the brake pads under test at different temperatures, thereby improving the accuracy of wear degree detection. Additionally, this device can simulate the effect of natural temperature on the wear degree of the brake pads under test in different seasons, further enhancing the rationality of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram showing the position of the transparent acrylic panel of the present invention.

[0018] Figure 3This is a schematic diagram showing the location of the temperature control port in this invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of the temperature-controlled room of the present invention.

[0020] Figure 5 This is a schematic diagram showing the position of the fixing rod in this invention.

[0021] Figure 6 This is a schematic diagram showing the positions of the brake oil pump and heating element of the present invention.

[0022] Figure 7 For the present invention Figure 4 Enlarged view of the structure of A in the middle.

[0023] Figure 8 This is a schematic diagram showing the position of the hub motor of the present invention.

[0024] In the diagram: 1. Temperature-controlled chamber; 2. Lifting base plate; 3. Ground roughness control frame; 4. Tire inspection; 5. Hub motor; 6. Brake pad to be inspected; 7. Central control display screen; 8. Stabilizing plate; 9. Stabilizing bar; 10. Lifting cylinder; 11. Fixing plate; 12. Fixing bar; 13. Simulated ground roughness plate; 14. Blocking frame; 15. Blocking bar; 16. Stabilizing jig frame; 17. Functional support plate; 18. Moving ball bearing; 19. Fixing disc; 20. Fixing threaded hole; 21. Oil reservoir; 22. Brake pump; 23. Piston support frame; 24. Caliper piston; 25. Heating element; 26. Transparent acrylic panel; 27. Temperature control port; 28. Temperature control heat insulation plug; 29. ​​Temperature sensor. Detailed Implementation

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

[0026] Please see Figure 1-8 As shown, a brake pad wear testing device includes a temperature-controlled chamber 1, a lifting base plate 2 inside the temperature-controlled chamber 1, a ground roughness control frame 3 above the lifting base plate 2, a test tire 4 above the ground roughness control frame 3, a hub motor 5 embedded in the test tire 4, brake pads 6 to be tested symmetrically arranged on both sides of the test tire 4, a central control display screen 7 on one inner wall of the temperature-controlled chamber 1, and a temperature sensor 29 on one inner wall of the temperature-controlled chamber 1.

[0027] like Figure 1As shown, the lifting base plate 2 is installed on the inner bottom wall of the temperature control room 1. Stabilizing plates 8 are symmetrically arranged at both ends of the upper surface of the lifting base plate 2. Stabilizing rods 9 are fixedly installed between the stabilizing plates 8 at the same end. Lifting cylinders 10 are hinged to both ends of the stabilizing rods 9. Fixing plates 11 are symmetrically arranged at both ends of the lower surface of the rough control frame. Fixing rods 12 are fixedly installed between the fixing plates 11 at the same end. The fixing rods 12 and the stabilizing rods 9 are on the same vertical line. The upper ends of the lifting cylinders 10 are hinged to the fixing rods 12 to simulate the state of the tire 4 when it is going uphill, downhill and rolling on a flat surface.

[0028] like Figure 1 and Figure 7 As shown, the inner walls of both sides of the ground roughness control frame 3 are provided with fixing grooves, and simulated ground roughness plates 13 are inserted into the fixing grooves. The simulated ground roughness plates 13 are in contact with the inner walls of the ground roughness control frame 3 and the inner walls of the fixing grooves. A blocking frame 14 is symmetrically provided on the outer surface of one end of the ground roughness control frame 3. A blocking rod 15 is inserted into the blocking frame 14. The upper side surface of the blocking rod 15 is in contact with the simulated ground roughness plate 13, so as to enable the detection tire 4 to roll on different ground conditions, thereby improving the accuracy of the brake pad 6 under test when detecting wear.

[0029] like Figure 6 As shown, a stable jig 16 is fixedly installed on both outer surfaces of the ground roughness control frame 3. A friction-reducing groove is opened on one inner wall of the stable jig 16. A functional support plate 17 is slidably installed in the friction-reducing groove. A ball groove is opened at one end of the functional support plate 17. Movable balls 18 are evenly arranged in the ball groove. The movable balls 18 are in contact with the friction-reducing inner wall to reduce the friction force exerted by the functional support plate 17 on the test tire 4 when it is rolling, thereby improving the accuracy of the brake pad 6 under test when testing the wear of the test tire 4.

[0030] like Figure 6As shown, each end of the functional support plate 17 is fixedly connected to a fixed disc 19. Fixed threaded holes 20 are evenly distributed on the outer surface of the fixed disc 19. The detection tire 4 is positioned between the fixed discs 19, with both sides of the detection tire 4 in contact with the fixed discs 19. Each end of the functional support frame has an oil reservoir 21, containing a brake pump 22. Each end of the functional support frame has a piston support frame 23, with a caliper piston 24 bolted to the upper end of each piston support frame 23. The output end of the brake pump 22 is connected to the caliper piston 24. The oil inlet ends of the caliper piston 24 are connected to each other by pipes. One end of the caliper piston 24 is fixedly connected to the brake pad 6 to be tested. A heating element 25 is embedded in the brake pad 6 to be tested. A transparent acrylic panel 26 is embedded in the outer wall of one side of the temperature control chamber 1. A temperature control port 27 is opened on the inner wall of one side of the temperature control chamber 1. A temperature control heat insulation plug 28 is installed in the temperature control port 27. A temperature sensor is installed on the inner wall of one side of the temperature control chamber 1 to detect the wear degree of the brake pad 6 to be tested under different temperatures. At the same time, this device can also simulate the wear degree of the brake pad 6 to be tested under different natural weather temperatures.

[0031] In use, the inspector connects the internal equipment of this device to an external main power supply. The inspector then fixes the test tire 4 using the fixing disc 19. After fixing the test tire 4, the inspector turns on the hub motor 5 to rotate the test tire 4. After adjusting the speed of the hub motor 5, the hub motor 5 moves along the surface of the simulated rough ground plate 13. At this time, the inspector turns on the power to the brake pump 22, which draws high-pressure brake fluid from the oil tank 21 to push the caliper piston 24 to move. The brake pad 6 under test then brakes the test tire 4. When the test tire 4 moves to the other end of the simulated rough ground plate, the inspector removes the brake pad 6 under test and then measures its weight, thus completing the wear test of the brake pad 6 under test.

[0032] Then, by controlling the lifting cylinder 10, the inspector can adjust the angle of the ground roughness control box 3. When the test tire 4 is adjusted to a certain angle, the staff repeats the above operation to meet the wear test of the brake pad 6 on different slopes. At the same time, the inspector can replace the simulated ground roughness plate 13 to achieve the test of the brake pad 6 on different road conditions.

[0033] When testing the wear of the brake pad 6 under test, the inspector can turn on the power of the heating element 25. At this time, the heating element 25 heats the brake pad 6 under test, so as to test the wear of the brake pad 6 under test at different temperatures, thereby improving the integrity and accuracy of the device.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A brake pad wear testing device, characterized in that: The system includes a temperature control room (1), a lifting base plate (2) is provided inside the temperature control room (1), a ground roughness control frame (3) is provided above the lifting base plate (2), a test tire (4) is provided above the ground roughness control frame (3), a hub motor (5) is embedded in the test tire (4), brake pads (6) to be tested are symmetrically arranged on both sides of the test tire (4), and a central control display screen (7) is provided on one inner wall of the temperature control room (1). The outer surfaces of both sides of the ground roughness control frame (3) are fixedly installed with a stabilizing I-beam frame (16). The inner wall of one side of the stabilizing I-beam frame (16) is provided with a friction-reducing groove. A functional support plate (17) is slidably installed in the friction-reducing groove. A ball groove is provided at one end of the functional support plate (17). Movable balls (18) are evenly arranged in the ball groove. The movable balls (18) are in contact with the inner wall of the friction-reducing groove. One end of each of the functional support plates (17) is fixedly connected to a fixed disc (19). The outer surface of the fixed disc (19) is uniformly provided with fixed threaded holes (20). The detection tire (4) is disposed between the fixed discs (19) and both sides of the detection tire (4) are in contact with the fixed discs (19). An oil reservoir (21) is provided on the upper surface of one end of the functional support plate (17). A brake pump (22) is provided in the oil reservoir (21). A piston support frame (23) is provided on the upper surface of one end of the functional support plate (17). A caliper piston (24) is bolted to the upper end of the piston support frame (23). The output end of the brake pump (22) and the oil inlet end of the caliper piston (24) are connected to each other by a pipeline. One end of the caliper piston (24) is fixedly connected to the brake pad (6) to be inspected. A heating element (25) is embedded in the brake pad (6) to be inspected.

2. The brake pad wear testing device according to claim 1, characterized in that: The lifting base plate (2) is installed on the inner bottom wall of the temperature control room (1). Stabilizing plates (8) are symmetrically arranged at both ends of the upper surface of the lifting base plate (2). Stabilizing rods (9) are fixedly installed between the stabilizing plates (8) at the same end. Lifting cylinders (10) are hinged at both ends of the stabilizing rods (9).

3. The brake pad wear testing device according to claim 2, characterized in that: The lower surface of the rough control frame is symmetrically provided with fixing plates (11) at both ends. Fixing rods (12) are fixedly installed between the fixing plates (11) at the same end. The fixing rods (12) and the stabilizing rods (9) are on the same vertical line. The upper ends of the lifting cylinders (10) are hinged to the fixing rods (12).

4. The brake pad wear testing device according to claim 3, characterized in that: The inner walls of both sides of the ground roughness control frame (3) are provided with fixing grooves, and simulated ground roughness plates (13) are inserted into the fixing grooves. The simulated ground roughness plates (13) are in close contact with the inner walls of the ground roughness control frame (3) and the inner walls of the fixing grooves. A blocking frame (14) is symmetrically provided on the outer surface of one end of the ground roughness control frame (3). A blocking rod (15) is inserted into the blocking frame (14). The upper side surface of the blocking rod (15) is in close contact with the simulated ground roughness plate (13).

5. The brake pad wear testing device according to claim 1, characterized in that: A transparent acrylic panel (26) is inlaid on one side of the outer wall of the temperature control room (1). A temperature control port (27) is opened on one side of the inner wall of the temperature control room (1). A temperature control heat insulation plug (28) is installed in the temperature control port (27). A temperature sensor (29) is installed on one side of the inner wall of the temperature control room (1).

6. A method for testing brake pad wear, using the brake pad wear testing apparatus described in claim 1, characterized in that, The steps are as follows: S1: Place the brake pad wear test device in a suitable position, fix the test tire (4) and the fixed disc (19) with bolts, then fix the brake pad (6) to be tested to one end of the caliper piston (24), check the stability of the internal parts of the brake pad wear test device when fixed, and then connect the electrical equipment in the temperature control room (1) to the external power supply. S2: Turn on the power of the hub motor (5) and check the tire (4) to start rotating. At this time, turn on the brake pump (22) to start working. The brake pump (22) pushes the high-pressure brake oil in the reservoir (21) to push the caliper piston (24). The caliper piston (24) drives the brake pad (6) to be tested to approach the hub of the tire (4) to be tested, so as to realize the test of the brake pad (6). S3: Turn on the power of the lifting cylinder (10), so that the lifting cylinder (10) drives the ground rough control frame (3) to lift and lower, control the lifting cylinder (10) at one end of the lifting base plate (2) to lift and lower, and simulate the situation of the tire (4) going uphill, downhill and rolling on the plane. S4: When testing the brake pad (6), replace the simulated ground roughness plate (13), pull the simulated ground roughness plate (13) out of the ground roughness control box (3) and replace it with a ground roughness plate of different roughness. S5: When the test tire (4) rolls, the movable ball (18) at one end of the functional support plate (17) rolls with the friction-reducing groove in the stable frame (16), which improves the test accuracy of the brake pad (6) and limits the test tire (4) through the friction-reducing groove. S6: When testing the brake pad (6), the brake pad (6) is heated by the heating plate (25). At this time, the rotation speed of the test tire (4) is kept constant, and the wear of the brake pad (6) is tested at different temperatures. S7: Replace with different simulated rough ground plates (13) to detect the effect of different ground surfaces on the wear of the brake pads (6) under test; S8: By introducing gases of different temperatures into the temperature control port (27), the temperature control chamber (1) is kept at different temperatures, thereby simulating the effect of different weather temperatures on the wear of the brake pads (6) under inspection.

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