A detection device for brake pads of an electric vehicle

Abstract

The application relates to the technical field of brake pad detection, in particular to a detection device for electric vehicle brake pads, which comprises a detection platform, a plurality of detection grooves are formed in the detection platform, a detection motor is installed at the bottom of each detection groove, a support table is installed at the output end of each detection motor, a plurality of fixing columns are fixedly installed on the support table, a vertical stand is vertically and fixedly installed on the detection platform, a movable platform is slidingly installed on the vertical stand, a plurality of pressing columns are installed at the bottom of the movable platform, a rotating pressure disc is rotatably installed on each pressing column, a driving screw is arranged on the detection platform, a driving motor is installed above the vertical stand, and a plurality of friction assemblies are arranged on the detection platform and correspond to the plurality of detection grooves. The detection efficiency is effectively improved by simultaneously locking the to-be-detected brake pad workpieces in the plurality of detection grooves through the movable platform and the plurality of pressing columns, and the problems of low efficiency and poor data stability of the traditional detection device are solved.

Description

Technical Field

[0001] This invention relates to the field of brake pad testing technology, specifically to a testing device for electric vehicle brake pads. Background Technology

[0002] In the production and quality control of brake pads, accurate and efficient laboratory testing of their wear resistance is a crucial step in assessing product lifespan and reliability. Currently, the industry's standard testing method primarily involves using a friction and wear testing machine to simulate actual working conditions, thereby inferring the wear rate and service life.

[0003] One of the core prerequisites of this testing process is that the brake pad sample must be clamped and fixed in a stable state on the testing device to ensure the reproducibility of the contact state of the friction pair. However, existing clamping techniques generally rely on traditional mechanical clamps, typically using multiple bolts to manually tighten the brake pads. This method has certain drawbacks in practical applications, severely restricting the efficiency of the testing work. Traditional testing devices have low clamping efficiency, cannot quickly clamp and test multiple workpieces at once, cannot adapt to the pace of large-scale quality inspection, and the operation of manually tightening each bolt is time-consuming and labor-intensive, making the sample preparation time account for too high a proportion of the entire testing cycle. This bottleneck is particularly prominent when facing batch sampling inspections on production lines or large-sample comparative tests. This results in low testing volume, making it difficult to meet the timeliness requirements of modern quality control.

[0004] Secondly, the poor consistency and controllability of the clamping process directly introduce human interference variables, impairing the accuracy and comparability of the test data. Because it relies entirely on the operator's feel and experience, the clamping torque applied by different personnel, and even the same personnel in different batches, inevitably exhibits dispersion. This fluctuation in clamping force leads to slight but not negligible changes in the initial contact state, pressure distribution, and even vibration characteristics of the workpiece under test during the testing process. These factors are precisely the key parameters affecting the friction and wear test results.

[0005] To address this, a testing device for electric vehicle brake pads is proposed, which can simultaneously perform rapid and uniform clamping and testing on multiple workpieces to be tested. Summary of the Invention

[0006] The purpose of this invention is to provide a testing device for electric vehicle brake pads, so as to solve the problems mentioned in the background art, which are low testing efficiency and unstable testing data due to the inability to uniformly and quickly clamp the brake pads to be tested.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A testing device for electric vehicle brake pads includes a circular testing platform with multiple circular testing slots evenly distributed around the center of the platform. A testing motor is fixedly mounted at the bottom of each testing slot, and a support platform for clamping the workpiece to be tested is fixedly mounted at the output end of each testing motor. Multiple fixed columns are fixedly mounted on each support platform. A vertical frame is fixedly mounted on the testing platform, and a movable platform is slidably mounted on the frame. Multiple pressing columns are vertically mounted at the bottom of the movable platform corresponding to the testing slots, and a rotating pressure plate is rotatably mounted at the bottom of each pressing column. The pressing columns and rotating pressure plates are coaxially aligned with the corresponding testing slots directly below them. A drive screw is located at the center of the testing platform, and the movable platform is fixedly connected to the screw nut of the drive screw. A drive motor for rotating the drive screw is mounted above the frame. Multiple friction components for frictional contact with the workpiece to be tested and for decelerating it are arranged on the testing platform corresponding to the testing slots. Through the above structural design, this device can simultaneously clamp and inspect multiple electric vehicle brake pads. In actual operation, the operator places the brake pads to be inspected onto the support platforms in their respective inspection slots. The fixed columns are used for initial positioning of the brake pads. Then, the drive motor is started, driving the lead screw to move the movable platform downwards along the frame, causing the rotating pressure plate at the bottom of the pressing column to contact the brake pad surface and apply stable pressure, completing the rapid clamping of multiple workpieces. During inspection, the inspection motor drives the support platform and the brake pad workpieces on it to rotate synchronously. Simultaneously, the friction component contacts the rotating brake pad, generating friction to simulate the actual working state of the brake pad. By setting the friction time, the surface texture of the brake pad is inspected after the time is up, allowing analysis of the brake pad wear. This multi-station synchronous inspection method effectively improves inspection efficiency, while the uniform clamping pressure and friction conditions ensure the accuracy and comparability of the inspection data, solving the problems of low efficiency and poor data stability inherent in traditional inspection devices.

[0008] Preferably, each of the detection slots has a hollowed-out portion on the side near the center of the detection platform, extending through the platform. The friction assembly includes multiple arc-shaped slots corresponding to the detection slots. A rotating frustum is coaxially mounted on the detection platform. Multiple arc-shaped sliders are fixedly mounted on the bottom of the rotating frustum corresponding to the arc-shaped slots. Each arc-shaped slider is inserted into its corresponding arc-shaped slot, with its bottom extending below the detection platform. An upper resistance plate is mounted directly above each arc-shaped slider, and a lower resistance plate is mounted below each arc-shaped slider. Both the upper and lower resistance plates are hydraulically driven and can interact with each other. The rotating platform is vertically fixed with a sleeve, which has a spiral guide groove. A drive rod is vertically fixed on the movable platform, and a roller is horizontally rotatably mounted below the drive rod. The roller is inserted into the spiral guide groove. When the drive rod drives the roller to slide from the top to the bottom of the guide groove, the roller pushes the rotating platform to rotate by an offset angle, so that each upper resistance piece is located on the same diameter of the detection platform as the corresponding detection groove, and the projection of each upper resistance piece in the vertical direction coincides with the hollow part of the corresponding detection groove.

[0009] In the actual testing process, when the movable platform moves downward under the drive screw, the drive rod moves downward synchronously with the movable platform. The roller at its bottom slides in the spiral guide groove. Due to the spiral structure of the guide groove, the roller will generate a circumferential thrust on the sleeve, thereby driving the rotating frustum to rotate around the central axis of the testing platform.

[0010] As the roller slides from the top to the bottom of the guide groove, the rotating platform rotates at a preset offset angle. At this time, each arc-shaped slider slides along the corresponding arc-shaped groove to one end of the arc-shaped groove and abuts against the end of the arc-shaped groove. At this time, the upper resistance plate directly above the arc-shaped slider and the corresponding detection groove are on the same diameter of the detection platform, and the projection of the upper resistance plate in the vertical direction coincides with the hollow part of the detection groove.

[0011] At this point, the hydraulic system drives the upper and lower resistance plates to approach each other, contacting the rotating brake pad workpiece through the hollowed-out section to simulate frictional deceleration. The guide groove, drive rod, and rotating platform work together to convert the vertical motion of the movable platform into the circumferential rotation of the rotating platform, ensuring precise alignment of the friction assembly and the detection groove, providing a reliable structural foundation for multi-station synchronous testing. Furthermore, this structural design enhances the synchronization between the friction assembly and the detection groove.

[0012] As the platform rises, it simultaneously moves the upper and lower resistance plates, causing them to deflect so that their vertical projections do not coincide with the test slot. This makes it easier for testers to place the brake pads to be tested into the test slot. This further improves the ease of use of the equipment, thereby increasing testing efficiency.

[0013] Preferably, the sleeve is also provided with a vertical straight groove, the straight groove is located below the guide groove and is smoothly connected to the lowest point of the guide groove, the bottom of the movable platform is fixedly installed with multiple rods corresponding to multiple arc grooves, and the rotating round platform is provided with a clearance part.

[0014] When the roller moves to the bottom of the guide groove, the clearance part and the insert rod are located in the same vertical direction, and the shapes of the clearance part and the insert rod completely coincide with the area of ​​the arc groove that is not filled by the arc slider; when the roller enters the straight groove along the guide groove and moves to the bottom of the straight groove, the insert rod is inserted into the area of ​​the arc groove that is not filled by the arc slider and makes the arc slider unable to slide along the arc groove.

[0015] By setting up a straight groove, insert rod, and clearance part, when the roller enters the straight groove from the bottom of the guide groove, the drive rod drives the roller to slide down the vertical straight groove, and the movable platform can continue to move downward. At this time, the rotating frustum stops rotating because the spiral thrust of the guide groove disappears.

[0016] Simultaneously, the insertion rod at the bottom of the moving platform moves downward, passes through the clearance part on the rotating platform, and precisely inserts into the area of ​​the arc-shaped groove that is not filled by the arc-shaped slider. Because the shape of the insertion rod perfectly matches this area, it fits tightly against the inner wall of the arc-shaped groove after insertion, restricting the sliding freedom of the arc-shaped slider within the arc-shaped groove, thereby fixing the rotating platform and the detection platform relatively.

[0017] This dual-limiting structure achieves initial locking of the circumferential position of the rotating frustum through the cooperation of the rollers and the straight groove, and rigidly fixes the arc-shaped slider through the insertion of the plug rod and the arc-shaped groove. This effectively prevents the friction components from shifting due to vibration or the reaction force of the brake pads or workpiece during the testing process, ensuring that the upper and lower resistance plates maintain stable frictional contact with the workpiece under test, further improving the reliability of the test data. At the same time, it also prevents damage to the drive rod, ensuring the equipment's service life and operational stability.

[0018] Preferably, a protective cover is fixedly installed at the bottom of the active platform, and when the active platform moves downward to its extreme position, the bottom of the protective cover is in contact with the top surface of the detection platform.

[0019] The protective cover effectively prevents debris from flying during brake pad testing, helping to ensure the safety of testing personnel and the hygiene of the testing laboratory. At the same time, the cover prevents hair and clothing from the external environment from being caught in the high-speed rotating brake pads during testing, thus avoiding equipment malfunctions and personnel injuries. Alternatively, it prevents brake pads from flying out at high speed during testing in the event of equipment malfunction, further ensuring the safety of the testing process.

[0020] Preferably, the detection platform is equipped with multiple detection cameras corresponding to multiple detection slots, and the multiple detection cameras correspond one-to-one with the multiple detection slots. The outside of the protective cover is equipped with multiple display screens corresponding to the multiple detection cameras, and the multiple display screens correspond one-to-one with the multiple detection slots. The display screens are electrically connected to the corresponding detection cameras and are used to display the images captured by the monitoring cameras.

[0021] The multi-station testing device allows for setting different testing parameters for multiple brake pads, such as setting different testing times for each brake pad in each testing slot, greatly improving the convenience of testing. However, while the protective cover improves safety, it also means that testing personnel can only lift the protective cover to observe the brake pads after all brake pads have been tested, which is not conducive to quickly obtaining the condition of the brake pads.

[0022] By combining a detection camera with a display screen to form an intelligent sensing system, the detection camera can replace manual observation of the brake pads' condition inside the protective cover, and transmit the captured images to the display screen. This allows inspectors to quickly obtain information about the brake pads' condition while ensuring their safety, thus further improving inspection efficiency.

[0023] Preferably, each of the insertion rods has guide ramps on both sides of its bottom.

[0024] The guide ramp serves as a guide, facilitating the insertion of the rod into the area of ​​the arc-shaped groove not filled by the arc-shaped slider, thus ensuring the effective operation of the equipment.

[0025] Preferably, the detection platform is further equipped with multiple temperature-measuring thermal imagers corresponding to multiple detection slots, with each thermal imager corresponding to one detection slot, and each thermal imager is electrically connected to the display screen of the corresponding detection slot. The detection camera can only effectively observe the surface condition of the brake pads when the brake pads have stopped rotating. Thermal imagers can monitor the temperature changes on the brake pad surface in real time as the brake pads rotate at high speed and come into contact with the friction components. The temperature field distribution visually reflects the frictional heating of the brake pads. This dynamic temperature monitoring is crucial for assessing the thermal stability and heat dissipation performance of brake pads. When the local temperature of the brake pads is too high, thermal degradation may occur, affecting its coefficient of friction and braking effect. The linkage between the thermal imager and the display screen allows inspectors to simultaneously observe temperature data and real-time images during the inspection process, promptly identifying anomalies. This provides richer data support for a comprehensive analysis of brake pad performance, further improving the scientific rigor and accuracy of the inspection.

[0026] Preferably, each of the insertion rods has a lubrication groove around its perimeter, and each lubrication groove is filled with grease. The lubrication grooves and grease allow the insertion rod to lubricate the inner wall of the arc-shaped groove when it is inserted into and removed, thus allowing the insertion rod to enter the arc-shaped groove more smoothly, improving the smoothness of equipment operation, and ensuring that the rotating platform does not rotate due to contact between the upper and lower resistance plates and the workpiece during brake pad testing, thereby ensuring the stability of the equipment during the testing process.

[0027] Meanwhile, the insertion rod drives the rotating platform to rotate by pressing the guide groove with rollers. During insertion and extraction, the insertion rod lubricates the arc-shaped groove, allowing the arc-shaped slider to slide more smoothly within the groove. This reduces the friction experienced by the rotating platform, requiring less force from the drive rod to rotate it. Therefore, it prevents the drive rod from bending or deforming due to excessive resistance from the rotating platform during rotation, thus improving the service life and stability of the insertion rod.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The electric vehicle brake pad testing device designed in this invention sets up multiple testing slots and a movable platform that can move up and down. The up and down movement of the movable platform drives multiple pressing columns to simultaneously lock the brake pad workpieces to be tested inside the multiple testing slots, which effectively improves the testing efficiency. At the same time, the uniform clamping pressure and friction conditions also ensure the accuracy and comparability of the test data, solving the problems of low efficiency and poor data stability of traditional testing devices.

[0029] 2. The electric vehicle brake pad testing device designed in this invention is equipped with a rotating platform. Through the cooperation of the drive rod, rollers, and guide groove, the moving platform moves up and down, driving the rotating platform to rotate. This allows the upper resistance plate to avoid obstructing the testing groove when the brake pad to be tested is installed. When the brake pad to be tested is locked, it moves synchronously with the moving platform to the working position, further improving the ease of use of the equipment and increasing the efficiency of brake pad testing.

[0030] 3. The electric vehicle brake pad testing device designed in this invention also includes a straight groove and an insert rod. After the roller pushes the rotating platform to its limit position, the roller enters the straight groove, allowing the movable platform to continue moving downwards without interference. At this time, the insert rod on the movable platform continues to move downwards and inserts into the arc-shaped groove, filling the arc-shaped groove and locking the arc-shaped slider. This ensures that the rotating platform will not reverse due to the reaction force during the brake pad testing process, thus improving the stability of the equipment. Attached Figure Description

[0031] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a perspective view of the internal structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a top view of the assembly between the detection platform and the rotating frustum in this invention; Figure 5 This is a schematic diagram of the internal structure of the active platform when it is at the top in this invention; Figure 6 This is a schematic diagram of the internal structure of the active platform when it moves downwards in this invention; Figure 7 This is a perspective view of the rotating frustum in this invention; Figure 8 This is a perspective view of the active platform in this invention; Figure 9 This is a bottom view of the active platform in this invention.

[0032] In the diagram: 1. Detection platform; 2. Detection groove; 3. Detection motor; 4. Support platform; 5. Fixed column; 6. Stand; 7. Movable platform; 8. Pressing column; 9. Rotating pressure plate; 10. Drive screw; 11. Drive motor; 12. Hollowed-out part; 13. Arc groove; 14. Rotating truncated cone; 15. Arc slider; 16. Upper resistance plate; 17. Lower resistance plate; 18. Sleeve; 19. Guide groove; 20. Roller; 21. Straight groove; 22. Insert rod; 23. Clearance part; 24. Protective cover; 25. Detection camera; 26. Display screen; 27. Guide ramp; 28. Temperature measuring thermal imager; 29. ​​Lubrication groove; 30. Support leg; 31. Drive rod; α, Offset angle. Detailed Implementation

[0033] Please see Figures 1 to 9 This invention provides a testing device for electric vehicle brake pads, the technical solution of which is as follows: A testing device for electric vehicle brake pads, reference Figure 2 The system includes a circular testing platform 1, with support legs 30 fixedly installed at the bottom. Four circular testing slots 2 are formed on the testing platform 1, and the four testing slots 2 are evenly distributed around the center of the testing platform 1. Each testing slot 2 has a hollow section 12 on the side closest to the center of the testing platform 1, which penetrates the testing platform 1.

[0034] refer to Figure 1 , Figure 2 , Figure 5 as well as Figure 8 and Figure 9Each detection slot 2 has a detection motor 3 fixedly installed at its bottom. Each detection motor 3 has a support platform 4 fixedly installed at its output end for clamping the workpiece to be inspected. Four fixed posts 5 are fixedly installed on each support platform 4. A vertical frame 6 is fixedly installed on the detection platform 1. A movable platform 7 is slidably installed on the frame 6. Four pressing posts 8 are vertically installed at the bottom of the movable platform 7 corresponding to the four detection slots 2. A rotating pressure plate 9 is rotatably installed at the bottom of each pressing post 8. The pressing posts 8 and rotating pressure plates 9 are coaxially arranged with the corresponding detection slot 2 directly below them. A drive screw 10 is located at the center of the detection platform 1. The drive screw 10 uses a planetary roller 20 screw pair, which has self-locking capability and strong load capacity. The movable platform 7 is fixedly connected to the screw nut of the drive screw 10. A drive motor 11 is installed above the frame 6 to drive the drive screw 10 to rotate.

[0035] refer to Figure 1 , Figure 2 , Figure 5 and Figure 8 A protective cover 24 is fixedly installed at the bottom of the movable platform 7. When the movable platform 7 moves downward to its extreme position, the bottom of the protective cover 24 is in contact with the top surface of the detection platform 1. Four detection cameras 25 are installed on the detection platform 1 corresponding to the four detection slots 2. Four displays 26 are installed on the outside of the protective cover 24 corresponding to the four detection cameras 25. The four displays 26 correspond one-to-one with the four detection slots 2. The displays 26 are electrically connected to the corresponding detection cameras 25 and are used to display the images captured by the monitoring cameras. Four temperature measuring thermal imagers 28 are also installed on the detection platform 1 corresponding to the four detection slots 2. In this embodiment, the temperature measuring thermal imagers 28 are FOTRIC600C series precision temperature measuring online thermal imaging cameras. The four temperature measuring thermal imagers 28 correspond one-to-one with the four detection slots 2, and each temperature measuring thermal imager 28 is electrically connected to the display screen 26 of the corresponding detection slot 2.

[0036] refer to Figures 2 to 7The detection platform 1 has four friction components corresponding to the four detection slots 2, which are used to make frictional contact with the workpiece to be detected and decelerate it. The friction components include four arc-shaped slots 13 corresponding to the four detection slots 2. A rotating frustum 14 is coaxially mounted on the detection platform 1. Four arc-shaped sliders 15 are fixedly mounted on the bottom of the rotating frustum 14 corresponding to the four arc-shaped slots 13. The four arc-shaped sliders 15 are inserted into the corresponding arc-shaped slots 13 one by one and their bottoms extend below the detection platform 1. An upper resistance plate 16 is installed directly above each arc-shaped slider 15, and a lower resistance plate 17 is installed below each arc-shaped slider 15. The upper resistance plates 16 and lower resistance plates 17 are hydraulically driven and can move closer to each other. A sleeve 18 is vertically fixed on the rotating frustum 14. A spiral guide groove 19 is provided on the sleeve 18. A drive rod 31 is vertically fixed on the movable platform 7. A roller 20 is horizontally rotatably mounted below the drive rod 31 and is inserted into the spiral guide groove 19. When the drive rod 31 drives the roller 20 to slide from the top to the bottom of the guide groove 19, the roller 20 pushes the rotating frustum 14 to rotate by an offset angle α, so that each upper resistance piece 16 is located on the same diameter of the detection platform 1 with the corresponding detection groove 2, and the vertical projection of each upper resistance piece 16 coincides with the hollow part 12 of the corresponding detection groove 2. In this embodiment, the spiral guide groove 19 is designed such that when the vertically moving roller 20 slides from the top to the bottom of the guide groove 19, the offset angle α of the rotating frustum 14 is 30°.

[0037] refer to Figures 2 to 8 The sleeve 18 is also vertically provided with a straight groove 21, which is located below the guide groove 19 and smoothly connected to the lowest point of the guide groove 19. Four rods 22 are fixedly installed at the bottom of the movable platform 7 corresponding to the four arc-shaped grooves 13. Each rod 22 has guide ramps 27 on both sides of its bottom, and each rod 22 has a lubrication groove 29 around its perimeter, filled with grease. The rotating platform 14 has a clearance part 23; when the roller 20 moves to the bottom of the guide groove 19, the clearance part 23 and the rods 22 are located in the same vertical direction, and the shapes of the clearance part 23 and the rods 22 completely overlap with the area of ​​the arc-shaped groove 13 not filled by the arc-shaped slider 15.

[0038] When using, refer to Figure 1 and Figure 2 as well as Figure 5 The drive motor 11 drives the drive screw 10 to rotate, causing the movable platform 7 to move upward to its highest point and then stop. At this time, the projections of each upper resistance plate 16 and lower resistance plate 17 in the vertical direction do not coincide with the detection slot 2. Then, the four brake pads to be tested are placed into the four detection slots 2 respectively, and the bolt holes on the brake pads are engaged with the fixing posts 5 on the support platform 4 to achieve initial fixing of the brake pads.

[0039] Then, refer to Figures 2 to 7 The drive motor 11 is started, which drives the drive screw 10 to rotate. The movable platform 7 begins to move downwards, and the drive rod 31 follows the movable platform 7 to move vertically downwards. The roller 20 on the drive rod 31 presses against the side wall of the guide groove 19 inside the guide groove 19. During the downward movement of the roller 20, it provides a circumferential thrust to the guide groove 19, which in turn drives the sleeve 18 and the rotating platform 14 fixedly connected to the sleeve 18 to start rotating. As the rotating platform 14 rotates, the four arc-shaped sliders 15 also slide inside the arc-shaped groove 13. When the roller 20 moves to the lowest point of the guide groove 19, the rotating platform 14 has rotated by an offset angle α, and each arc-shaped slider 15 has also moved to the limit position of its respective arc-shaped groove 13, with the side wall of the arc-shaped slider 15 abutting against one end of the arc-shaped groove 13. At this time, the upper resistance plate 16 and the lower resistance plate 17 on each arc-shaped slider 15 are located on the same diameter of the detection platform 1 with the corresponding detection groove 2, and the projection of each upper resistance plate 16 in the vertical direction coincides with the hollow part 12 of the corresponding detection groove 2.

[0040] And at the instant when the roller 20 moves from the lowest point of the guide groove 19, reference Figure 2 and Figure 3 The four insert rods 22 on the movable platform 7 are respectively located in the same vertical direction as the four clearance parts 23, and the shapes of the clearance parts 23 and the insert rods 22 completely coincide with the area of ​​the arc groove 13 directly below that is not filled by the arc slider 15. Subsequently, as the drive screw 10 continues to rotate, the roller 20 can enter the straight groove 21 from the guide groove 19 and continue to move vertically downward, so that the movable platform 7 can also continue to move downward. Finally, when the bottom of the protective cover 24 abuts against the upper surface of the detection platform 1, the drive motor 11 stops rotating, and the movable platform 7 also stops moving downward. At this time, the four insert rods 22 are respectively inserted into the four arc grooves 13, and each insert rod 22 cooperates with the arc slider 15 inside the arc groove 13 to fill the arc groove 13, that is, the arc slider 15 can no longer slide inside the arc groove 13, and the arc slider 15 is locked.

[0041] When the bottom surface of the protective cover 24 comes into contact with the top surface of the detection platform 1, refer to Figure 5 and Figure 6 Each pressing column 8 has a rotating pressure plate 9 that presses coaxially onto the brake pad to be tested directly below, thus achieving complete positioning of the brake pad.

[0042] Then, refer to Figure 2 and Figure 7When the detection motor 3 starts, it begins to rotate the brake pads inside each detection slot 2. The upper resistance plate 16 and lower resistance plate 17 corresponding to each detection slot 2, according to a pre-set configuration, begin to frictionally decelerate the brake pads. For example, when the detection motor 3 rotates the brake pads to 2000 r / min, the upper resistance plate 16 and lower resistance plate 17 begin to move closer together under hydraulic drive. The upper resistance plate 16 and lower resistance plate 17 simultaneously clamp the brake pads from the upper and lower sides, respectively, reducing the brake pad's rotational speed until it stops. This process is repeated 20 times. Alternatively, only the upper resistance plate 16 or lower resistance plate 17 can be controlled to rub against the brake pads individually to decelerate them.

[0043] refer to Figure 2 and Figure 5 During the frictional deceleration of the brake pads by the upper resistance plate 16 and lower resistance plate 17, the thermal imager 28 monitors the temperature of the brake pads in real time and feeds the data back to the corresponding display screen 26. During inspection, the inspection camera 25 also takes pictures of the brake pads each time they decelerate and stop, transmitting the surface wear condition of the brake pads to the display screen 26, allowing inspectors to quickly understand the condition of the brake pads and record it.

[0044] After all brake pads have been inspected, the drive motor 11 moves the movable platform 7 upward, and the rotating platform 14 automatically resets with the cooperation of the rollers 20 and the guide groove 19. Inspectors can quickly remove the inspected brake pads and install new brake pads into the inspection slot 2 using the same method, quickly starting a new round of inspections.

[0045] This concludes the explanation of the operating principle of the entire device.

[0046] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A testing device for electric vehicle brake pads, characterized in that, The system includes a circular inspection platform (1), on which multiple circular inspection slots (2) are provided. The multiple inspection slots (2) are evenly distributed around the center of the inspection platform (1). Each inspection slot (2) has a fixed inspection motor (3) at its bottom. Each inspection motor (3) has a fixed support platform (4) at its output end for clamping the workpiece to be inspected. Multiple fixed columns (5) are fixedly installed on the support platform (4). A vertical frame (6) is fixedly installed on the inspection platform (1). A movable platform (7) is slidably installed on the vertical frame (6). The bottom of the movable platform (7) is... Multiple pressing columns (8) are vertically installed corresponding to multiple detection slots (2). Each pressing column (8) has a rotating pressure plate (9) rotatably installed at its bottom. The pressing column (8) and the rotating pressure plate (9) are coaxially arranged with the corresponding detection slot (2) directly below. A drive screw (10) is provided at the center of the detection platform (1). The movable platform (7) is fixedly connected to the screw nut of the drive screw (10). A drive motor (11) for driving the drive screw (10) to rotate is installed on the top of the upright frame (6). Multiple friction components for frictional contact with the workpiece to be tested are provided on the detection platform (1) corresponding to multiple detection slots (2).

2. The electric vehicle brake pad testing device according to claim 1, characterized in that, Each of the detection slots (2) has a hollow section (12) on one side near the center of the detection platform (1) and penetrates the detection platform (1). The friction assembly includes multiple arc-shaped slots (13) corresponding to the multiple detection slots (2). A rotating frustum (14) is coaxially mounted on the detection platform (1). Multiple arc-shaped sliders (15) are fixedly mounted on the bottom of the rotating frustum (14) corresponding to the multiple arc-shaped slots (13). The multiple arc-shaped sliders (15) are inserted one by one into the corresponding arc-shaped slots (13) and their bottoms extend below the detection platform (1). An upper resistance plate (16) is installed directly above each arc-shaped slider (15), and a lower resistance plate (17) is installed below each arc-shaped slider (15). The upper resistance plate (16) and the lower resistance plate (17) are both hydraulically driven and can approach each other. A sleeve (18) is vertically fixed on the frustum (14). A spiral guide groove (19) is provided on the sleeve (18). A drive rod (31) is vertically fixed on the movable platform (7). A roller (20) is horizontally rotatably installed below the drive rod (31). The roller (20) is inserted into the spiral guide groove (19). When the drive rod (31) drives the roller (20) to slide from the top of the guide groove (19) to the bottom of the guide groove (19), the roller (20) pushes the rotating frustum (14) to rotate by an offset angle (α), so that each upper resistance piece (16) is located on the same diameter of the detection platform (1) with the corresponding detection groove (2), and the projection of each upper resistance piece (16) in the vertical direction coincides with the hollow part (12) of the corresponding detection groove (2).

3. The electric vehicle brake pad testing device according to claim 2, characterized in that, The sleeve (18) is also vertically provided with a straight groove (21), which is located below the guide groove (19) and smoothly connected to the lowest point of the guide groove (19). The bottom of the movable platform (7) is fixedly installed with multiple rods (22) corresponding to multiple arc grooves (13). The rotating truncated cone (14) is provided with a clearance part (23). When the roller (20) moves to the bottom of the guide groove (19), the clearance part (23) and the rods (22) are closed. Located in the same vertical direction, and with the shapes of the avoidance part (23) and the insertion rod (22) completely overlapping the area of ​​the arc groove (13) not filled by the arc slider (15); when the roller (20) enters the straight groove (21) along the guide groove (19) and moves to the bottom of the straight groove (21), the insertion rod (22) is inserted into the area of ​​the arc groove (13) not filled by the arc slider (15) and makes the arc slider (15) unable to slide along the arc groove (13).

4. The electric vehicle brake pad testing device according to claim 1, characterized in that, The bottom of the active platform (7) is fixedly installed with a protective cover (24). When the active platform (7) moves downward to the limit position, the bottom of the protective cover (24) is in contact with the top surface of the detection platform (1).

5. The electric vehicle brake pad testing device according to claim 4, characterized in that, The detection platform (1) is equipped with multiple detection cameras (25) corresponding to multiple detection slots (2). The protective cover (24) is equipped with multiple display screens (26) corresponding to multiple detection cameras (25). The multiple display screens (26) correspond one-to-one with the multiple detection slots (2). The display screens (26) are electrically connected to the corresponding detection cameras (25) and are used to display the images captured by the monitoring cameras.

6. The electric vehicle brake pad testing device according to claim 3, characterized in that, Each of the insert rods (22) has guide ramps (27) on both sides of its bottom. The guide ramps (27) are used to guide the insert rod (22) to be inserted into the area of ​​the arc groove (13) that is not filled by the arc slider (15).

7. The electric vehicle brake pad testing device according to claim 5, characterized in that, The detection platform (1) is also equipped with multiple temperature measuring thermal imagers (28) corresponding to multiple detection slots (2). The multiple temperature measuring thermal imagers (28) correspond one-to-one with the multiple detection slots (2), and each temperature measuring thermal imager (28) is electrically connected to the display screen (26) of the corresponding detection slot (2).

8. The electric vehicle brake pad testing device according to claim 3, characterized in that, Each of the inserts (22) has a lubrication groove (29) around its perimeter, and each of the lubrication grooves (29) is filled with grease.

Images