A defect detection device for brake pads

Abstract

The present invention relates to the technical field of detection equipment, and specifically to a defect detection equipment for brake pads, comprising a detection platform, and also comprising: a rotating disc, which is arranged on the detection platform and fixedly connected to a brake disc on one side thereof. The device simulates the situation where foreign objects such as stones invade between the brake pads and the brake disc by periodically extending the test convex out of the brake disc and contacting the brake pad during the rotation of the brake disc, thereby improving the comprehensiveness of the test. When the brake disc rotates, the brake pad can use friction to drive the test convex to slide relative to the brake disc and use a resistance member to provide resistance, thereby further simulating the situation when foreign objects invade, improving the simulation degree of the test, and reducing the damage to the brake disc. At the same time, the device can also perform multiple tests. When the test convex is not used for the foreign object invasion simulation test, the test convex can be driven to be retracted, and the arc block can be driven to fill the arc groove at the same time to ensure the integrity of the brake disc and improve the test accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment, and in particular to a defect detection equipment for brake pads. Background Art

[0002] As the core component of the braking system of traditional and new energy vehicles, automobile brake pads play a key role in quickly converting the vehicle's kinetic energy into heat energy through friction, thereby achieving stable vehicle stopping. In view of its high requirements for safety performance, brake pads must undergo strict performance testing after production. The current mainstream testing equipment uses an external drive motor to drive the brake disc to rotate, and uses an ejection mechanism to press the brake pad against the brake disc to simulate the friction process. The testing methods mainly include: measuring the time required for the brake disc to stop completely at a fixed speed to evaluate the friction efficiency of the brake pad; and continuously driving the brake disc pressed by the brake pad to rotate by the drive motor to detect the wear resistance of the brake pad;

[0003] However, in the field of new energy vehicles, especially electric vehicles and hybrid vehicles, due to the differences in power systems and higher energy efficiency requirements, the performance evaluation of the brake system is also facing new challenges. The brake system of new energy vehicles not only needs to meet conventional braking needs, but also needs to work closely with the energy recovery system (such as regenerative braking) to improve the overall energy efficiency. In addition, given the complex environment faced by brake pads in actual use, current detection methods cannot fully reflect their true performance in new energy vehicles. For example, when braking during driving, whether it is a traditional car or a new energy car, foreign objects such as stones will occasionally invade between the brake pads and the brake disc, causing the brake pads to suffer additional wear. The performance changes in this special case are often ignored in the existing detection environment, but their impact on the safety of the brake system cannot be ignored. For this reason, we propose a defect detection device for brake pads. Summary of the invention

[0004] A technical problem to be solved by the present application is: how to design a brake pad defect detection device that can simulate the intrusion of foreign matter.

[0005] In order to solve the above technical problems, the embodiment of the present application provides a defect detection device for brake pads, including a detection platform and also including:

[0006] A rotating disc is arranged on the testing platform and a brake disc is fixedly connected to one side of the rotating disc. A driving assembly connected to the rotating disc is arranged on the testing platform and is used to drive the brake disc to rotate;

[0007] A sliding plate is slidably arranged on the inspection platform and a brake pad is detachably connected to one side of the sliding plate. The inspection platform is provided with an ejection assembly connected to the sliding plate, which is used to drive the brake pad to move and then press the brake disc;

[0008] A test cam is slidably arranged on the rotating disc;

[0009] The periodic pusher is arranged on the rotating disc. When the rotating disc rotates and drives the test cam to rotate, the periodic pusher is used to push the test cam out and push the brake pad when the test cam is located on one side of the brake pad.

[0010] The resistance member is arranged on the rotating disc and connected with the test convex. When the brake disc rotates, the brake pad drives the test convex to move relative to the brake disc by friction, and the resistance member provides resistance for it at the same time.

[0011] In some embodiments, the driving assembly includes a driving motor fixedly connected to the detection table, a hollow shaft 1 is fixedly connected to one side of the rotating disc, a shaft 2 is fixedly connected to the output shaft of the driving motor, one end of the shaft 2 passes through the hollow shaft 1 and is fixed thereto, and the driving motor is started to drive the rotating disc to rotate.

[0012] In some embodiments, the periodic pusher comprises a hollow cylinder arranged on a hollow shaft, a ring is arranged on the hollow cylinder, a deflection plate is fixedly connected to the ring, one end of the deflection plate is fixedly connected to the hollow column, one end of the test convex is located in the hollow column and detachably connected thereto, an arc groove is opened on the brake disc, and one end of the test convex is located in the arc groove;

[0013] A mounting frame is fixedly connected to the testing platform, the shaft two is rotatably connected to the mounting frame, a ring body is arranged on one side of the mounting frame, an arc-shaped convex is arranged on the ring body, one end of the hollow cylinder is rotatably connected to the shaft three, a rotating column is fixedly connected to the shaft three, a sliding convex is fixedly connected to the inner wall of the hollow cylinder, and a sliding groove is provided on the hollow shaft one, one end of the sliding convex is located in the sliding groove one and is slidably connected to the inner wall of the sliding groove, when the rotating disk rotates, the rotating column is driven to rotate along the ring body and the arc-shaped convex is used to push the rotating column to move, so as to drive the test convex to push out of the brake disc and contact the brake pad.

[0014] In some embodiments, the resistance member includes a torsion spring mounted on the hollow cylinder, and the ring one is rotatably connected to the hollow cylinder, and the two ends of the torsion spring are respectively fixed to the ring one and the hollow cylinder. When the brake disc rotates, the brake pad uses friction to drive the test cam to slide along the arc groove, and at the same time, the torsion spring is twisted under force to provide it with self-restoring elastic force.

[0015] In some embodiments, the mounting frame is fixedly connected to an electric push rod 1, the annular body is fixedly connected to a slide rod having one end sliding through the mounting frame, and the annular body is fixed to the extended end of the electric push rod 1, and the electric push rod 1 is started to drive the annular body to retract;

[0016] An arc block is slidably connected in the arc groove, the arc block is connected to the deflection plate, the arc block is designed with the same material as the brake disc, and is used to block the arc groove. A linkage is provided between the arc block and the annular body. When the electric push rod is started, the annular body is driven to move and extend, and at the same time, the linkage is used to drive the arc block to move out of the arc groove.

[0017] In some embodiments, the linkage member includes an injection cylinder 1 fixedly connected to the deflection plate, one end of the arc block is fixedly connected to a push rod, one end of the push rod is located in the injection cylinder 1 and fixedly connected to a piston, and the injection cylinder 1 is filled with hydraulic oil, the circular ring 1 is fixedly connected to the injection cylinder 2, and the injection cylinder 2 is also filled with hydraulic oil, the injection cylinder 2 is connected to the injection cylinder 1 through a hard conduit, the injection cylinder 2 is also slidably connected to the piston, one end of the piston is also fixedly connected to the push rod, one end of the push rod is fixedly connected to the circular ring 2, and the circular ring 2 is rotatably connected to the circular ring body, and moving the circular ring body drives the arc block to move.

[0018] In some embodiments, the ejection assembly includes a support frame fixedly connected to the detection table, to which the second electric push rod is fixedly connected, and a guide rod is fixedly connected to one side of the sliding plate, one end of the guide rod slides through the support frame, and the sliding plate is connected to the protruding end of the second electric push rod, and starting the second electric push rod drives the brake pad to move.

[0019] In some embodiments, a pressure sensor is fixedly connected to one side of the sliding plate, and the sliding plate is fixed to the second electric push rod through the pressure sensor.

[0020] In some embodiments, the bottom end of the detection platform is rotatably connected to shaft six, a counterweight plate is fixedly connected to shaft six, and shaft four is rotatably connected to the detection platform, shaft four and shaft six are both fixedly connected to synchronous pulleys, the two synchronous pulleys are connected by a synchronous belt, a gear disc one is provided on shaft six, and a gear disc two meshing with gear disc one is fixedly connected to shaft two, and the drive motor is started to drive the brake disc and the counterweight plate to rotate synchronously.

[0021] In some embodiments, a hollow shaft five is provided on the shaft four, the hollow shaft five is fixed to a toothed disc one, and a sliding protrusion two is fixedly connected to the inner wall of the hollow shaft five, a sliding groove two is opened on the shaft four, one end of the sliding protrusion two is located in the sliding groove two, and a movable plate is rotatably connected to one side of the hollow shaft five, an electric push rod three is fixedly connected to the mounting frame, the protruding end of the electric push rod three is fixed to the movable plate, and starting the electric push rod three drives the toothed disc one to move away from the toothed disc two.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. This device simulates the situation where foreign objects such as stones invade between the brake pad and the brake disc by periodically extending the test cam from the brake disc and contacting the brake pad during the rotation of the brake disc, thereby improving the comprehensiveness of the test.

[0024] 2. When the brake disc of this device rotates, the brake pad can use friction to drive the test cam to slide against the brake disc and use the resistance member to provide resistance, thereby further simulating the situation when foreign matter invades, improving the simulation degree of the test, and reducing the damage to the brake disc.

[0025] 3. This device can also perform multiple tests. When the test cam is not used for foreign body intrusion simulation test, the test cam can be retracted and the arc block can be driven to fill the arc groove to ensure the integrity of the brake disc and improve the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0027] Figure 2 For the present invention Figure 1 Another structural diagram;

[0028] Figure 3 For the present invention Figure 2 Schematic diagram of the local cross-section structure;

[0029] Figure 4 For the present invention Figure 3 Schematic diagram of the local cross-section structure;

[0030] Figure 5 For the present invention Figure 4 Schematic diagram of the local cross-section structure;

[0031] Figure 6 For the present invention Figure 5 Schematic diagram of the local cross-section structure;

[0032] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0033] Figure 8 For the present invention Figure 7 Schematic diagram of the structure of area A.

[0034] In the figure: 1-testing table; 2-rotating disc; 3-brake disc; 4-driving assembly; 5-sliding plate; 6-brake pad; 7-ejection assembly; 8-testing convex; 9-periodic pusher; 10-resistance member; 41-driving motor; 42-hollow shaft 1; 43-shaft 2; 44-hollow cylinder; 45-ring 1; 46-deflection plate; 47-hollow column; 48-arc groove; 49-mounting frame; 51-annular body; 52-arc convex; 53-shaft 3; 54-rotating column; 55-sliding convex 1; 56-sliding groove 1; 57 -torsion spring; 58-electric push rod one; 59-sliding rod; 61-arc block; 62-linkage; 63-injection cylinder one; 64-elevator; 65-piston; 66-injection cylinder two; 67-ring two; 68-support frame; 69-electric push rod two; 71-guide rod; 72-pressure sensor; 73-axis six; 74-counterweight plate; 75-axis four; 76-synchronous pulley; 77-toothed disc one; 78-toothed disc two; 79-hollow shaft five; 81-sliding cam two; 82-sliding groove two; 83-moving plate; 84-electric push rod three. DETAILED DESCRIPTION

[0035] 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 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 creative work are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figure 1-Figure 6 The present invention provides a technical solution: a defect detection device for a brake pad, comprising a detection platform 1, and also comprising:

[0037] A rotating disc 2 is arranged on the testing platform 1 and a brake disc 3 is fixedly connected to one side thereof. A driving assembly 4 connected to the rotating disc 2 is arranged on the testing platform 1 and is used to drive the brake disc 3 to rotate;

[0038] A sliding plate 5 is slidably arranged on the testing platform 1 and a brake pad 6 is detachably connected to one side of the sliding plate 5. An ejection assembly 7 connected to the sliding plate 5 is arranged on the testing platform 1 to drive the brake pad 6 to move and then press the brake disc 3;

[0039] A test cam 8 is slidably arranged on the rotating disc 2;

[0040] The periodic pusher 9 is arranged on the rotating disc 2. When the rotating disc 2 rotates and drives the test cam 8 to rotate, the periodic pusher 9 is used to push the test cam 8 out and push the brake pad 6 when the test cam 8 is located on one side of the brake pad 6;

[0041] The resistance member 10 is arranged on the rotating disc 2 and connected to the test protrusion 8. When the brake disc 3 rotates, the brake pad 6 drives the test protrusion 8 to move relative to the brake disc 3 by friction, and the resistance member 10 provides resistance for it;

[0042] Specifically, the device simulates the situation in which foreign objects such as stones invade between the brake pad 6 and the brake disc 3 by periodically extending the test protrusion 8 from the brake disc 3 and contacting the brake pad 6 during the rotation of the brake disc 3, thereby improving the comprehensiveness of the test. At the same time, when the brake disc 3 rotates, the brake pad 6 can use friction to drive the test protrusion 8 to slide relative to the brake disc 3 and use the resistance member 10 to provide resistance, thereby further simulating the situation when foreign objects invade, improving the simulation degree of the test, and reducing the damage to the brake disc 3. At the same time, the device can also perform multiple tests. When the test protrusion 8 is not used for the foreign object intrusion simulation test, the test protrusion 8 can be driven to be retracted, and the arc block 61 can be driven to fill the arc groove 48 to ensure the integrity of the brake disc 3 and improve the test accuracy.

[0043] The driving assembly 4 includes a driving motor 41 fixedly connected to the detection platform 1, a hollow shaft 42 is fixedly connected to one side of the rotating disc 2, a shaft 2 43 is fixedly connected to the output shaft of the driving motor 41, one end of the shaft 2 43 passes through the hollow shaft 1 42 and is fixedly connected thereto, and starting the driving motor 41 drives the shaft 2 43 and the hollow shaft 1 42 to rotate, thereby driving the rotating disc 2 and the brake disc 3 to rotate.

[0044] The periodic pusher 9 includes a hollow cylinder 44 arranged on a hollow shaft 42, a ring 45 is arranged on the hollow cylinder 44, a deflection plate 46 is fixedly connected to the ring 45, one end of the deflection plate 46 is fixedly connected to a hollow column 47, one end of the test convex 8 is located in the hollow column 47 and is detachably connected thereto, so as to facilitate the replacement of the worn test convex 8, an arc groove 48 is opened on the brake disc 3, and one end of the test convex 8 is located in the arc groove 48;

[0045] A mounting frame 49 is fixedly connected to the test table 1, and the second shaft 43 is rotatably connected to the mounting frame 49 through a bearing. A ring body 51 is arranged on one side of the mounting frame 49, and an arc-shaped convex 52 is fixedly connected to the ring body 51. A third shaft 53 is rotatably connected to one end of the hollow cylinder 44, and a rotating column 54 is fixedly connected to the third shaft 53. A sliding convex 55 is fixedly connected to the inner wall of the hollow cylinder 44, and a sliding groove 56 is provided on the hollow shaft 42. One end of the sliding convex 55 is located in the sliding groove 56 and is slidably connected to the inner wall of the sliding convex 55. A damping connection is adopted between the hollow cylinder 44 and the second shaft 43. Specifically, it requires a certain force to slide the hollow cylinder 44 relative to the second shaft 43. When the rotating disc 2 rotates, the rotating column 54 is driven to rotate along the ring body 51 and the arc-shaped convex 52 is used to push the rotating column 54 to move, so as to drive the test convex 8 to push out the brake disc 3 and contact the brake pad 6, so as to simulate the invasion of debris in the process of the brake pad 6 contacting the brake disc 3.

[0046] The resistance member 10 includes a torsion spring 57 sleeved on the hollow cylinder 44, and the ring 1 45 is rotatably connected to the hollow cylinder 44 through a bearing, and the two ends of the torsion spring 57 are fixedly connected to the ring 1 45 and the hollow cylinder 44 respectively. When the brake disc 3 rotates, the brake pad 6 uses friction to drive the test cam 8 to slide along the arc groove 48, and at the same time, the torsion spring 57 is twisted by force to provide it with self-restoring elastic force. The role of arranging the torsion spring 57 here is to simulate the actual brake pad 6 and the brake disc 3 when foreign objects invade. Since the brake disc 3 is relatively smooth and the brake pad 6 is relatively rough, the foreign object will move a distance relative to the brake disc 3 during the rotation of the brake disc 3 that is greater than the distance relative to the brake pad 6. Therefore, in this device, the friction between the brake disc 3 and the foreign objects is replaced by the power of the torsion spring 57, thereby improving the accuracy of the device test.

[0047] An electric push rod 58 is fixedly connected to the mounting frame 49, and a slide rod 59 with one end sliding through the mounting frame 49 is fixedly connected to the annular body 51, and the annular body 51 is fixedly connected to the extended end of the electric push rod 58. The electric push rod 58 is started to drive the annular body 51 to retract, and is used to drive the test convex 8 to retract when the foreign body intrusion simulation test is not used, and at the same time drive the arc block 61 to fill the arc groove 48, so as to ensure the integrity of the brake disc 3 and improve the test accuracy;

[0048] An arc block 61 is slidably connected in the arc groove 48, and the arc block 61 is connected to the deflection plate 46. The arc block 61 is designed with the same material as the brake disc 3, and is used to block the arc groove 48 to ensure the integrity of the brake disc 3 and improve the test accuracy. A linkage part 62 is arranged between the arc block 61 and the annular body 51. The electric push rod 58 is started to drive the annular body 51 to move and extend, and at the same time, the linkage part 62 is used to drive the arc block 61 to move out of the arc groove 48.

[0049] The linkage member 62 includes an injection cylinder 1 63 fixedly connected to the deflection plate 46, one end of the arc block 61 is fixedly connected to a push rod 64, one end of the push rod 64 is located in the injection cylinder 1 63 and fixedly connected to a piston 65, the piston 65 is slidably connected to the inner wall of the injection cylinder 1 63, and the injection cylinder 1 63 is filled with hydraulic oil, and the ring 1 45 is fixedly connected to the injection cylinder 2 66, and the injection cylinder 2 66 is also filled with hydraulic oil. The injection cylinder 2 66 is connected to the injection cylinder 1 63 through a hard conduit, and the injection cylinder 2 66 is also slidably connected to the piston 65, and one end of the piston 65 is connected to the injection cylinder 1 The push rod 64 is fixedly connected to the push rod 64, one end of which is fixedly connected to the ring 2 67, and the ring 2 67 is rotatably connected to the ring body 51 through a bearing, and at the same time, the arc block 61 is driven to move when the ring body 51 is moved. Specifically, when the electric push rod 1 58 is started and extended, the ring body 51 is driven to move into place, and the ring 2 67 is driven to move to drive the piston 65 in the syringe 2 66 to move, so as to extract the hydraulic oil in the syringe 1 63, and then drive the arc block 61 to move out of the arc groove 48 to prepare for the test of simulating the intrusion of debris in the actual brake pad 6 and the brake disc 3.

[0050] The ejection assembly 7 includes a support frame 68 fixedly connected to the inspection table 1, an electric push rod 2 69 is fixedly connected to the support frame 68, and a guide rod 71 is fixedly connected to one side of the sliding plate 5, one end of the guide rod 71 slides through the support frame 68, and the sliding plate 5 is connected to the protruding end of the electric push rod 2 69, and the electric push rod 2 69 is started to drive the brake pad 6 to move.

[0051] A pressure sensor 72 is fixedly connected to one side of the sliding plate 5. The sliding plate 5 is fixedly connected to the electric push rod 2 69 through the pressure sensor 72. When the electric push rod 2 69 is started to drive the brake pad 6 to press the brake disc 3, the pressure sensor 72 is used to monitor the pressure in real time, thereby improving the accuracy of the test;

[0052] Specifically, when the device is in use, the brake pad 6 to be tested and the sliding plate 5 are first installed, and then the driving motor 41 is started to drive the second shaft 43 and the hollow shaft 1 42 to rotate, thereby driving the rotating disc 2 and the brake disc 3 to rotate. At the same time, during the rotation of the brake disc 3, the hollow shaft 1 42 is used to drive the hollow cylinder 44 to rotate, so as to drive the circular ring 1 45, the deflection plate 46, the hollow column 47 and the test convex 8 in the hollow column 47 to rotate simultaneously. At the same time, when the hollow cylinder 44 rotates, the rotating column 54 is also driven to rotate along the annular body 51. When the rotating column 54 hits the arc convex 52 on the annular body 51 during the rotation process, the rotating column 54 will be used to push the hollow cylinder 44, thereby driving the test convex 8 to pass through the arc groove 48, so as to drive the test convex 8 to push out of the brake disc 3 and contact the brake pad 6, so as to simulate the invasion of debris during the process of the brake pad 6 contacting the brake disc 3, wherein starting the electric push rod 2 69 can drive the brake pad 6 to move and contact the brake disc 3;

[0053] At the same time, after the brake pad 6 contacts the test convex 8, the brake disc 3 continues to rotate, and the brake pad 6 drives the test convex 8 to slide along the arc groove 48 by friction, and the torsion spring 57 is twisted to provide a self-restoring elastic force, and then the friction between the brake disc 3 and the debris is replaced by the force of the torsion spring 57, thereby improving the accuracy of the device test;

[0054] At the same time, the electric push rod 1 58 is started and extended to drive the annular body 51 to move into place, and at the same time drives the annular ring 67 to move to drive the piston 65 in the syringe 2 66 to move to extract the hydraulic oil in the syringe 1 63, and then drives the arc block 61 to move out of the arc groove 48 to prepare for the simulation of the actual brake pad 6 and the brake disc 3 intrusion of debris test.

[0055] Example 2: Please refer to Figure 1-Figure 8 , the present invention provides a technical solution: Example 2 is optimized on the basis of Example 1;

[0056] The bottom end of the testing platform 1 is rotatably connected to shaft six 73 through a bearing, and a counterweight plate 74 is fixedly connected to shaft six 73, and shaft four 75 is rotatably connected to the testing platform 1 through a bearing, and shaft four 75 and shaft six 73 are both fixedly connected to synchronous pulleys 76, and the two synchronous pulleys 76 are connected by a synchronous belt, a toothed disc 1 77 is provided on shaft six 73, and a toothed disc 2 78 meshing with the toothed disc 1 77 is fixedly connected to shaft two 43, and the driving motor 41 is started to drive the brake disc 3 and the counterweight plate 74 to rotate synchronously.

[0057] A hollow shaft 5 79 is sleeved on the shaft 4 75, and the hollow shaft 5 79 is fixedly connected to the toothed disc 1 77, and a sliding protrusion 2 81 is fixedly connected to the inner wall of the hollow shaft 5 79, and a sliding groove 2 82 is opened on the shaft 4 75, one end of the sliding protrusion 2 81 is located in the sliding groove 2 82 and is slidably connected to the inner wall thereof, and a moving plate 83 is rotatably connected to one side of the hollow shaft 5 79 through a bearing, and an electric push rod 3 84 is fixedly connected to the mounting frame 49, and the protruding end of the electric push rod 3 84 is fixedly connected to the moving plate 83, and the electric push rod 3 84 is started to drive the toothed disc 1 77 to move away from the toothed disc 2 78;

[0058] Specifically, when the friction efficiency of the brake pad 6 is monitored using the device body, the electric push rod three 84 is started to drive the movable plate 83, the hollow shaft five 79, and the gear plate one 77 to move, so that the gear plate one 77 is engaged with the gear plate two 78, and then the drive motor 41 is started to drive the brake disc 3 and the counterweight plate 74 to rotate synchronously. The counterweight plate 74 is used to provide additional kinetic energy for the brake disc 3, thereby simulating the actual situation. When the car brakes, the brake pad 6 not only has to overcome the kinetic energy of the rotation of the brake disc 3, but also has to overcome the inertial kinetic energy of the car itself, thereby improving the simulation test capability of the device.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0060] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A defect detection device for brake pads, comprising a detection table (1), characterized in that: Also included are: A rotating disc (2) is arranged on the testing platform (1) and has a brake disc (3) fixedly connected to one side thereof; a driving assembly (4) connected to the rotating disc (2) is arranged on the testing platform (1) and is used to drive the brake disc (3) to rotate; A sliding plate (5) is slidably arranged on the inspection platform (1) and a brake pad (6) is detachably connected to one side of the sliding plate (5); an ejection assembly (7) connected to the sliding plate (5) is arranged on the inspection platform (1) and is used to drive the brake pad (6) to move and then press the brake disc (3); A testing cam (8) is slidably arranged on the rotating disc (2); A periodic pusher (9) is arranged on the rotating disc (2). When the rotating disc (2) rotates to drive the test cam (8) to rotate, the periodic pusher (9) is used to push the test cam (8) out and push the brake pad (6) when the test cam (8) is located on one side of the brake pad (6); The resistance member (10) is arranged on the rotating disc (2) and connected to the test cam (8). When the brake disc (3) rotates, the brake pad (6) drives the test cam (8) to move relative to the brake disc (3) by means of friction, while the resistance member (10) provides resistance thereto.

2. The defect detection device for brake pads according to claim 1, characterized in that: The driving assembly (4) comprises a driving motor (41) fixedly connected to the detection platform (1); a hollow shaft 1 (42) is fixedly connected to one side of the rotating disc (2); a shaft 2 (43) is fixedly connected to the output shaft of the driving motor (41); one end of the shaft 2 (43) passes through the hollow shaft 1 (42) and is fixed thereto; the driving motor (41) is started to drive the rotating disc (2) to rotate.

3. The defect detection device for brake pads according to claim 2, characterized in that: The periodic pusher (9) comprises a hollow cylinder (44) arranged on a hollow shaft (42), a ring (45) being arranged on the hollow cylinder (44), a deflection plate (46) being fixedly connected to the ring (45), one end of the deflection plate (46) being fixedly connected to a hollow column (47), one end of the test protrusion (8) being located in the hollow column (47) and being detachably connected thereto, an arc groove (48) being provided on the brake disc (3), and one end of the test protrusion (8) being located in the arc groove (48); A mounting frame (49) is fixedly connected to the test platform (1), the second shaft (43) is rotatably connected to the mounting frame (49), a circular ring body (51) is arranged on one side of the mounting frame (49), an arc-shaped protrusion (52) is arranged on the circular ring body (51), one end of the hollow cylinder (44) is rotatably connected to the third shaft (53), a rotating column (54) is fixedly connected to the third shaft (53), a sliding protrusion (55) is fixedly connected to the inner wall of the hollow cylinder (44), and a sliding groove (56) is provided on the hollow shaft (42), one end of the sliding protrusion (55) is located in the sliding groove (56) and is slidably connected to the inner wall of the sliding groove, when the rotating disk (2) rotates, the rotating column (54) is driven to rotate along the circular ring body (51) and the arc-shaped protrusion (52) is used to push the rotating column (54) to move, so as to drive the test protrusion (8) to push out the brake disc (3) and contact the brake pad (6).

4. The defect detection device for brake pads according to claim 3, characterized in that: The resistance member (10) includes a torsion spring (57) sleeved on the hollow cylinder (44), and the circular ring (45) is rotatably connected to the hollow cylinder (44). The two ends of the torsion spring (57) are respectively fixed to the circular ring (45) and the hollow cylinder (44). When the brake disc (3) rotates, the brake pad (6) uses friction to drive the test cam (8) to slide along the arc groove (48), and at the same time, the torsion spring (57) is twisted by force to provide it with self-restoring elastic force.

5. The defect detection device for brake pads according to claim 4, characterized in that: The mounting frame (49) is fixedly connected to an electric push rod (58), the annular body (51) is fixedly connected to a slide rod (59) having one end sliding through the mounting frame (49), and the annular body (51) is fixedly connected to an extended end of the electric push rod (58), and the electric push rod (58) is started to drive the annular body (51) to retract; An arc block (61) is slidably connected in the arc groove (48), the arc block (61) is connected to the deflection plate (46), the arc block (61) is designed with the same material as the brake disc (3), and is used to block the arc groove (48). A linkage member (62) is provided between the arc block (61) and the annular body (51), and the electric push rod (58) is started to drive the annular body (51) to move and extend, and at the same time, the arc block (61) is driven by the linkage member (62) to move away from the arc groove (48).

6. The defect detection device for brake pads according to claim 5, characterized in that: The linkage member (62) comprises an injection cylinder (63) fixedly connected to the deflection plate (46); one end of the arc block (61) is fixedly connected to a push rod (64); one end of the push rod (64) is located in the injection cylinder (63) and fixedly connected to a piston (65); the injection cylinder (63) is filled with hydraulic oil; the annular ring (45) is fixedly connected to a second injection cylinder (66); the injection cylinder (66) is also filled with hydraulic oil; the second injection cylinder (66) is connected to the injection cylinder (63) via a hard conduit; the injection cylinder (66) is also slidably connected to a piston (65); one end of the piston (65) is also fixedly connected to a push rod (64); one end of the push rod (64) is fixedly connected to a second annular ring (67); the second annular ring (67) is rotatably connected to the annular body (51); movement of the annular body (51) drives the arc block (61) to move.

7. The defect detection device for brake pads according to claim 6, characterized in that: The ejection assembly (7) comprises a support frame (68) fixedly connected to the inspection table (1), a second electric push rod (69) fixedly connected to the support frame (68), and a guide rod (71) fixedly connected to one side of the sliding plate (5), one end of the guide rod (71) slides through the support frame (68), and the sliding plate (5) is connected to the protruding end of the second electric push rod (69), and the second electric push rod (69) is started to drive the brake pad (6) to move.

8. The defect detection device for brake pads according to claim 7, characterized in that: A pressure sensor (72) is fixedly connected to one side of the sliding plate (5), and the sliding plate (5) is fixed to the second electric push rod (69) via the pressure sensor (72).

9. The defect detection device for brake pads according to claim 8, characterized in that: The bottom end of the detection platform (1) is rotatably connected to a sixth shaft (73), a counterweight plate (74) is fixedly connected to the sixth shaft (73), and a fourth shaft (75) is rotatably connected to the detection platform (1), and a synchronous pulley (76) is fixedly connected to the fourth shaft (75) and the sixth shaft (73), and the two synchronous pulleys (76) are connected by a synchronous belt, a toothed disc (77) is provided on the sixth shaft (73), and a toothed disc (78) meshing with the first toothed disc (77) is fixedly connected to the second shaft (43), and the driving motor (41) is started to drive the brake disc (3) and the counterweight plate (74) to rotate synchronously.

10. The defect detection device for brake pads according to claim 9, characterized in that: A hollow shaft five (79) is arranged on the shaft four (75), the hollow shaft five (79) is fixed to the toothed disc one (77), and a sliding protrusion two (81) is fixedly connected to the inner wall of the hollow shaft five (79), a sliding groove two (82) is opened on the shaft four (75), one end of the sliding protrusion two (81) is located in the sliding groove two (82), and a moving plate (83) is rotatably connected to one side of the hollow shaft five (79), an electric push rod three (84) is fixedly connected to the mounting frame (49), and the protruding end of the electric push rod three (84) is fixed to the moving plate (83), and the electric push rod three (84) is started to drive the toothed disc one (77) to move away from the toothed disc two (78).

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