Automobile wiper motor performance testing device

Abstract

The invention relates to the technical field of wiper motor performance testing, and discloses an automobile wiper motor performance testing device which comprises a testing table, a movable mounting seat is arranged on the testing table, a dynamometer is fixed to the mounting seat, a hollow rod is slidably connected to an input shaft of the dynamometer, a connecting seat is fixed to the hollow rod, and the connecting seat is connected with the dynamometer. The connecting seat is provided with an internal thread, and a movable brush block is arranged in the connecting seat; a rotatable rotating disc is arranged on the test bench, a plurality of placing seats which are circumferentially distributed at equal intervals are fixed on the rotating disc, in the test process, the fixing process of the wiper motor body and the connecting process of the wiper motor body and the dynamometer are time-saving, labor-saving, convenient and rapid, and the test efficiency of the wiper motor can be greatly improved. The reliability, the safety and the service life of the functions of the wiper motor body can be verified in low-voltage, rated-voltage and high-voltage states, and the test precision is improved.

Description

Technical Field

[0001] This invention relates to the field of wiper motor performance testing technology, specifically to a device for testing the performance of automotive wiper motors. Background Technology

[0002] The wiper motor is a crucial component of a car's wiper system, playing a vital role in vehicle safety. Therefore, to ensure the operational performance and stability of the wiper motor, its output torque and speed must be tested after each wiper motor completes production. Applying a precisely measurable and controllable load to the motor's output shaft while simultaneously measuring the motor's steady-state speed under different loads is a core step in evaluating its power performance, matching the wiper system load, and ensuring effective wiping. During testing, the wiper motor needs to be connected to a dynamometer. The dynamometer provides stepless, smooth, and precisely controllable braking torque, serving both as a load consuming motor power and as a sensor for real-time, high-precision measurement of the motor's torque and speed.

[0003] During the testing of the wiper motor, multiple screws are required to fix it to the testing equipment. Then, a flexible or rigid coupling is used to align and connect the motor output shaft with the dynamometer shaft. Multiple screws are also required to tighten the connection. After the test is completed, the screws need to be removed one by one. This process is time-consuming and labor-intensive, which greatly affects the testing efficiency of the wiper motor. Summary of the Invention

[0004] This invention provides a performance testing device for automotive wiper motors. During the testing process, the fixing of the wiper motor body and its connection to the dynamometer are time-saving, labor-saving, convenient, and quick, significantly improving the testing efficiency of wiper motors. This solves the problem mentioned in the background art, where the wiper motor requires multiple screws to fix it to the testing equipment, and then a flexible or rigid coupling is used to align and connect the motor output shaft with the dynamometer's shaft. This connection also requires multiple screws for tightening, and after testing, the screws must be removed sequentially, a process that is time-consuming and labor-intensive, greatly affecting the testing efficiency of wiper motors.

[0005] The present invention provides the following technical solution: a performance testing device for an automotive wiper motor, comprising a test bench, a movable mounting base on the test bench, a dynamometer fixed on the mounting base, a hollow rod slidably connected to the input shaft of the dynamometer, a connecting seat fixed on the hollow rod, the connecting seat having an internal thread, and a movable brush block inside the connecting seat;

[0006] The test bench is equipped with a rotatable turntable, on which are fixed several circumferentially distributed placement seats. The wiper motor body is placed on the placement seats, and a movable clamping block is provided on one side of the placement seats. The motor shaft of the wiper motor body is provided with external threads. A power controller is fixed on one side of the placement seats, and the power controller is provided with an adjustment knob.

[0007] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, wherein: a rotating shaft is rotatably connected to the test platform, and a servo motor for driving the rotating shaft to rotate is installed on the test platform; a support frame is fixed on the turntable; a first electric push rod is fixed on the support frame; and an abutment strip is fixed on the piston rod of the first electric push rod.

[0008] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, wherein: an abutment head is fixed on the abutment block, the abutment head is elastically connected to the placement seat through a first spring, and the abutment head abuts against the abutment strip.

[0009] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, wherein: a slide rod is fixed on the test platform, a slider is slidably connected to the slide rod, the slider is fixedly connected to the mounting base, a second electric push rod is fixed on the test platform, the piston rod of the second electric push rod is elastically connected to the slider through a second spring, and an L-shaped abutment block is fixed on the second electric push rod.

[0010] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, wherein: a guide block is fixed on the hollow rod, a guide groove is provided on the input shaft of the dynamometer, the guide block is slidably connected in the guide groove, and a third spring is connected between the hollow rod and the input shaft of the dynamometer.

[0011] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, wherein: a gear is fixed on the adjustment knob, a rack is meshed on the gear, the rack is elastically connected to the turntable through a ninth spring, and an abutment wedge is fixed on the rack.

[0012] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, wherein: a push plate is provided inside the connecting seat, a first abutting rod is fixed on the push plate, the first abutting rod is elastically connected to the connecting seat through a fourth spring, and one end of the first abutting rod abuts against a first abutting frame, the first abutting frame being slidably connected to the connecting seat.

[0013] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, wherein: the upper end of the first contact frame abuts against a second contact rod, the second contact rod is slidably connected to the connecting seat, and a contact ring is fixed on the second contact rod; a third contact rod is fixed on the brush block, the third contact rod is elastically connected to the connecting seat through a fifth spring, and the third contact rod abuts against the contact ring.

[0014] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, wherein: an extension block is fixed on one side of the brush block, and a comb tooth frame is provided on the brush block; the comb tooth frame is elastically connected to the extension block through a sixth spring; a sliding bracket is fixed on the connecting seat; an annular scraper is slidably connected on the sliding bracket; a seventh spring is connected between the annular scraper and the sliding bracket; and a second abutment is fixed on the annular scraper.

[0015] As an optional embodiment of the automotive wiper motor performance testing device of the present invention, a second contact head is provided below the second contact frame, the second contact head is elastically connected to the turntable through an eighth spring, and the lower end of the second contact head abuts against a rocker plate, the rocker plate being rotatably connected to the turntable.

[0016] The present invention has the following beneficial effects:

[0017] 1. In this automotive wiper motor performance testing device, the wiper motor body to be tested can be placed on the placement seat. Through the cooperation of the first electric push rod, the contact strip, the contact head, and the clamping block, the wiper motor body can be quickly and firmly fixed in the placement seat. The power controller can be electrically connected to the wiper motor body. The test voltage of the wiper motor body can be adjusted by adjusting the knob. The input shaft of the dynamometer can be elastically connected to the hollow rod of the connecting seat. When the piston rod of the second electric push rod pushes the dynamometer to move, the connecting seat abuts against the motor shaft of the wiper motor body. When the wiper motor body rotates, the external thread and the internal thread are connected, realizing the purpose of automatic connection between the motor shaft of the wiper motor body and the connecting seat. This facilitates the wiper motor body to drive the dynamometer to run during testing, and detects the torque and speed of the wiper motor body. During the testing process, the fixing of the wiper motor body and the connection with the dynamometer are relatively time-saving and labor-saving, convenient and quick, which can greatly improve the testing efficiency of wiper motors.

[0018] The horizontal movement position of the L-shaped contact block can be adjusted by the second electric push rod so that it abuts against the contact wedge block, causing the rack to move upward and drive the gear to rotate. This facilitates the adjustment knob to rotate at a constant speed to automatically adjust the output voltage of the power controller, which can reduce voltage surges and thus protect the wiper motor body. This allows the wiper motor body to be tested under low voltage, rated voltage, and high voltage conditions to verify the reliability, safety, and service life of the wiper motor body, thereby improving the accuracy of the test.

[0019] 2. In this automotive wiper motor performance testing device, the brush block set inside the connecting seat can abut against the external thread on the motor shaft of the wiper motor body, thereby cleaning the impurities on the motor shaft. This ensures that the motor shaft of the wiper motor body can be screwed into place when it is connected to the thread of the connecting seat, thus ensuring that the entire testing process can operate safely, accurately and reliably, and avoiding damage to the motor shaft of the wiper motor body.

[0020] The pusher plate inside the connecting seat can abut against the end of the motor shaft of the wiper motor body, causing the pusher plate to drive the first abutting rod to abut against the first abutting frame. With the cooperation of the second abutting rod, the abutting ring and the third abutting rod, when the connecting seat is sleeved on the motor shaft of the wiper motor body, the brush block automatically abuts against the external thread. When the motor shaft of the wiper motor body rotates, it can clean the impurities on the external thread, thereby ensuring the firmness of the connection between the motor shaft of the wiper motor body and the connecting seat.

[0021] 3. In this automotive wiper motor performance testing device, the comb tooth frame on one side of the brush block facilitates the combing of residual impurities inside the brush block, so as to improve the cleaning effect of the brush block in the next cleaning. The annular scraper can scrape off the impurities on the comb tooth frame, clean the combed impurities, and reduce the residue of impurities.

[0022] When the brush block finishes cleaning and resets, the comb frame abuts against the connecting seat so that the comb frame moves on the brush block to automatically comb out the impurities. When the piston rod of the first electric push rod extends, it can abut against one end of the rocker, causing the rocker to deflect and abut against the second contact head. This causes the second contact head to move up and abut against the second contact frame of the annular scraper, so that the annular scraper moves horizontally along the comb frame to scrape away the combed impurities. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a cross-sectional view of the structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the turntable structure of the present invention.

[0026] Figure 4 This is a schematic diagram of the connector structure of the present invention.

[0027] Figure 5 This is a schematic diagram of the internal structure of the connector of the present invention.

[0028] Figure 6 for Figure 2 Enlarged view of point A in the middle.

[0029] Figure 7 for Figure 2 Enlarged view of section B in the middle.

[0030] Figure 8 This is a schematic diagram of the comb frame structure of the present invention.

[0031] In the diagram: 1. Test bench; 2. Mounting base; 3. Dynamometer; 4. Hollow rod; 5. Connecting seat; 6. L-shaped contact block; 7. Internal thread; 8. Brush block; 9. Turntable; 10. Placement seat; 11. Wiper motor body; 12. Clamping block; 13. External thread; 14. Power controller; 15. Adjustment knob; 16. Rotating shaft; 17. Servo motor; 18. Support frame; 19. First electric push rod; 20. Contact strip; 21. Contact head; 22. First spring; 23. Slide rod; 24. Slider; 25. Second electric push rod; 26. Second spring; 27. 1. Guide block; 28. Guide groove; 29. ​​Third spring; 30. Push plate; 31. First abutting rod; 32. Fourth spring; 33. First abutting frame; 34. Second abutting rod; 35. Abutting ring; 36. Third abutting rod; 37. Fifth spring; 38. Extension block; 39. Comb frame; 39. Sixth spring; 40. Sliding bracket; 41. Annular scraper; 42. Seventh spring; 43. Second abutting frame; 44. Second abutting head; 45. Eighth spring; 46. Rocker; 47. Gear; 48. Rack; 49. Ninth spring; 50. Abutting wedge. Detailed Implementation

[0032] 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.

[0033] Example 1, please refer to Figures 1 to 8 A performance testing device for an automotive wiper motor includes a test bench 1, a movable mounting base 2 on the test bench 1, a dynamometer 3 fixed on the mounting base 2, a hollow rod 4 slidably connected to the input shaft of the dynamometer 3, a connecting seat 5 fixed on the hollow rod 4, an internal thread 7 on the connecting seat 5, and a movable brush block 8 inside the connecting seat 5.

[0034] The test bench 1 is equipped with a rotatable turntable 9, and a number of circumferentially distributed placement seats 10 are fixed on the turntable 9. The wiper motor body 11 is placed on the placement seat 10, and a movable clamping block 12 is provided on one side of the placement seat 10. The motor shaft of the wiper motor body 11 is provided with an external thread 13. A power controller 14 is fixed on one side of the placement seat 10, and an adjustment knob 15 is provided on the power controller 14.

[0035] A rotating shaft 16 is rotatably connected to the test bench 1, and a servo motor 17 that drives the rotating shaft 16 to rotate is installed on the test bench 1. A support frame 18 is fixed on the turntable 9, and a first electric push rod 19 is fixed on the support frame 18. An abutment strip 20 is fixed on the piston rod of the first electric push rod 19.

[0036] An abutment head 21 is fixed on the abutment block 12. The abutment head 21 is elastically connected to the placement seat 10 through the first spring 22. The abutment head 21 abuts against the abutment strip 20.

[0037] A slide rod 23 is fixed on the test bench 1. A slider 24 is slidably connected to the slide rod 23. The slider 24 is fixedly connected to the mounting base 2. A second electric push rod 25 is fixed on the test bench 1. The piston rod of the second electric push rod 25 is elastically connected to the slider 24 through a second spring 26. An L-shaped abutment block 6 is fixed on the second electric push rod 25.

[0038] A guide block 27 is fixed on the hollow rod 4, and a guide groove 28 is provided on the input shaft of the dynamometer 3. The guide block 27 is slidably connected in the guide groove 28, and a third spring 29 is connected between the hollow rod 4 and the input shaft of the dynamometer 3.

[0039] A gear 47 is fixed on the adjustment knob 15. A rack 48 is meshed on the gear 47. The rack 48 is elastically connected to the turntable 9 through the ninth spring 49. An abutment wedge 50 is fixed on the rack 48.

[0040] refer to Figures 1 to 8 Place the wiper motor body 11 to be tested into the placement seat 10, and then manually connect the power terminal of the wiper motor body 11 to the power output terminal of the corresponding power controller 14. When the piston rod of the corresponding first electric push rod 19 extends, it drives the contact strip 20 to move down, so as to make contact with the end of the contact head 21 on the placement seat 10. This causes the contact head 21 to drive the clamping block 12 to move horizontally on the placement seat 10. The first spring 22 stores force so that the clamping block 12 firmly clamps the wiper motor body 11 to be tested onto the placement seat 10, avoiding displacement during the test and affecting the test.

[0041] When the motor shaft of the servo motor 17 drives the rotating shaft 16 to rotate, the turntable 9 and the placement seat 10 rotate synchronously, so that the motor shaft of the wiper motor body 11 under test is aligned with the connecting seat 5 on the input shaft of the dynamometer 3. Then the piston rod of the second electric push rod 25 extends, thereby driving the slider 24 to move horizontally on the slide rod 23 until the slider 24 is against the test table 1 and cannot move. During the movement of the slider 24, the dynamometer 3 and the connecting seat 5 on the mounting seat 2 move synchronously, causing the connecting seat 5 to abut against the motor shaft of the wiper motor body 11, and the hollow rod 4 on the connecting seat 5 slides on the input shaft of the dynamometer 3. The guide block 27 on the hollow rod 4 slides in the guide groove 28 on the input shaft of the dynamometer 3. The third spring 29 stores force. At this time, the second spring 26 on the piston rod of the second electric push rod 25 is not stored force, and the L-shaped contact block 6 is close to the contact wedge 50 at the lower end of the rack 48.

[0042] When the piston rod of the second electric push rod 25 continues to extend, the second spring 26 initially stores force, causing the L-shaped contact block 6 to contact the contact wedge block 50, causing the rack 48 to slide on the turntable 9, and the ninth spring 49 stores force so that the rack 48 drives the gear 47 to rotate, causing the adjustment knob 15 on the power controller 14 to rotate, so that the power controller 14 is adjusted to the rated test voltage. At the same time, the braking torque tested by the dynamometer 3 is set so that when the motor shaft of the wiper motor body 11 rotates, the external thread 13 on its motor shaft can be screwed into the internal thread 7 on the connecting seat 5, so that the motor shaft of the wiper motor body 11 is automatically connected to the connecting seat 5, and drives the dynamometer 3 to run, and detects the torque and speed of the wiper motor body 11.

[0043] After the wiper motor body 11 completes the rated voltage test, the piston rod of the second electric push rod 25 continues to extend so that the rack 48 drives the gear 47 to continue rotating, causing the adjustment knob 15 to rotate at a constant speed. This facilitates adjusting the rated voltage of the power controller 14 to the test high voltage to verify the safe upper limit of the wiper motor body 11's operation. After the test is completed, the piston rod of the second electric push rod 25 retracts, causing the adjustment knob 15 to rotate in the opposite direction at a constant speed, thereby adjusting the test high voltage of the power controller 14 to the test low voltage to verify the lower limit of the wiper motor body 11's function. During the performance test, this facilitates the verification of the wiper motor body 11's reliability, safety, and service life under low voltage, rated voltage, and high voltage conditions, which can improve the accuracy of the test.

[0044] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 8The connecting seat 5 is provided with a push plate 30, and a first abutting rod 31 is fixed on the push plate 30. The first abutting rod 31 is elastically connected to the connecting seat 5 through a fourth spring 32, and one end of the first abutting rod 31 abuts against a first abutting frame 33. The first abutting frame 33 is slidably connected to the connecting seat 5.

[0045] The upper end of the first contact frame 33 abuts against the second contact rod 34. The second contact rod 34 is slidably connected to the connecting seat 5, and a contact ring 35 is fixed on the second contact rod 34. A third contact rod 36 is fixed on the brush block 8. The third contact rod 36 is elastically connected to the connecting seat 5 through the fifth spring 37, and the third contact rod 36 abuts against the contact ring 35.

[0046] refer to Figures 1 to 6 Impurities can easily accumulate on the motor shaft of the wiper motor body 11, causing incomplete screwing when the motor shaft is threaded onto the connecting seat 5, thus affecting testing. It is necessary to remove the impurities from the motor shaft of the wiper motor body 11. When the connecting seat 5 moves and fits onto the motor shaft of the wiper motor body 11, it allows the motor shaft of the wiper motor body 11 to contact the pusher 30, causing the first contact rod 31 on the pusher 30 to slide on the connecting seat 5 and contact the first contact bracket 33. Furthermore, the fourth spring 32 stores force, and the first contact bracket 33 slides on the connecting seat 5 after being contacted, and contacts the second contact rod 34, so that the contact ring 35 slides on the connecting seat 5 and contacts the third contact rod 36, causing the brush block 8 to automatically press against the surface of the motor shaft of the wiper motor body 11. When the wiper motor body 11 rotates, it can automatically clean the impurities on the external thread 13. When the motor shaft of the wiper motor body 11 is threadedly connected to the connecting seat 5, it can be screwed into place, thereby ensuring that the entire test process can operate safely, accurately and reliably.

[0047] Example 3 is an improvement upon Example 2. For details, please refer to [link / reference]. Figures 1 to 8 An extension block 38 is fixed on one side of the brush block 8, and a comb tooth frame 39 is provided on the brush block 8. The comb tooth frame 39 is elastically connected to the extension block 38 through a sixth spring 391. A sliding bracket 40 is fixed on the connecting seat 5. An annular scraper 41 is slidably connected on the sliding bracket 40. A seventh spring 42 is connected between the annular scraper 41 and the sliding bracket 40. A second abutment frame 43 is fixed on the annular scraper 41.

[0048] The second contact head 44 is provided below the second contact frame 43. The second contact head 44 is elastically connected to the turntable 9 through the eighth spring 45, and the lower end of the second contact head 44 abuts against the rocker plate 46, which is rotatably connected to the turntable 9.

[0049] refer to Figures 2 to 6Impurities are easily left in the bristles of brush block 8, which will affect the cleaning effect of brush block 8 in the next cleaning. It is necessary to clean the remaining impurities. After the test is completed, the braking torque of the control dynamometer 3 is adjusted so that the wiper motor body 11 rotates in the opposite direction and the dynamometer 3 remains stationary, so that the motor shaft of the wiper motor body 11 is separated from the connecting seat 5 and the brush block 8 is automatically reset. During the reset process, the comb tooth frame 39 slides on the extension block 38. The sixth spring 391 stores force so that the comb tooth frame 39 combs the impurities on the brush block 8. When the piston rod of the first electric push rod 19 continues to extend downward, it can contact one end of the rocker plate 46 so that the rocker plate 46 deflects on the turntable 9, thereby driving the second contact head 44 to slide and contact the second contact frame 43. The eighth spring 45 stores force so that the second contact frame 43 drives the annular scraper 41 to move on the sliding bracket 40. The seventh spring 42 stores force so that the annular scraper 41 moves horizontally along the comb tooth frame 39 so as to scrape away the combed impurities.

[0050] Among them, the dynamometer 3, power controller 14, servo motor 17, first electric push rod 19 and second electric push rod 25 are all electrically connected to the PLC controller through wires.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A performance testing device for automotive wiper motors, comprising a test bench (1), characterized in that: The test bench (1) is provided with a movable mounting base (2), a dynamometer (3) is fixed on the mounting base (2), a hollow rod (4) is slidably connected to the input shaft of the dynamometer (3), a connecting seat (5) is fixed on the hollow rod (4), an internal thread (7) is provided on the connecting seat (5), and a movable brush block (8) is provided inside the connecting seat (5). The test bench (1) is provided with a rotatable turntable (9), and a number of circumferentially distributed placement seats (10) are fixed on the turntable (9). The wiper motor body (11) is placed on the placement seat (10), and a movable clamping block (12) is provided on one side of the placement seat (10). The motor shaft of the wiper motor body (11) is provided with an external thread (13). A power controller (14) is fixed on one side of the placement seat (10), and an adjustment knob (15) is provided on the power controller (14).

2. The automotive wiper motor performance testing device according to claim 1, characterized in that: The test bench (1) is rotatably connected to a rotating shaft (16), and a servo motor (17) for driving the rotating shaft (16) to rotate is installed on the test bench (1). A support frame (18) is fixed on the turntable (9), and a first electric push rod (19) is fixed on the support frame (18). An abutment strip (20) is fixed on the piston rod of the first electric push rod (19).

3. The automotive wiper motor performance testing device according to claim 2, characterized in that: The abutting block (12) is fixed with an abutting head (21), which is elastically connected to the placement seat (10) through a first spring (22), and the abutting head (21) abuts against the abutting strip (20).

4. The automotive wiper motor performance testing device according to claim 1, characterized in that: A slide rod (23) is fixed on the test platform (1), and a slider (24) is slidably connected on the slide rod (23). The slider (24) is fixedly connected to the mounting base (2). A second electric push rod (25) is fixed on the test platform (1). The piston rod of the second electric push rod (25) is elastically connected to the slider (24) through a second spring (26). An L-shaped abutment block (6) is fixed on the second electric push rod (25).

5. The automotive wiper motor performance testing device according to claim 1, characterized in that: A guide block (27) is fixed on the hollow rod (4), and a guide groove (28) is provided on the input shaft of the dynamometer (3). The guide block (27) is slidably connected in the guide groove (28), and a third spring (29) is connected between the hollow rod (4) and the input shaft of the dynamometer (3).

6. The automotive wiper motor performance testing device according to claim 1, characterized in that: A gear (47) is fixed on the adjustment knob (15), and a rack (48) is meshed on the gear (47). The rack (48) is elastically connected to the turntable (9) through a ninth spring (49), and an abutment wedge (50) is fixed on the rack (48).

7. The automotive wiper motor performance testing device according to claim 1, characterized in that: The connecting seat (5) is provided with a push plate (30), and a first abutting rod (31) is fixed on the push plate (30). The first abutting rod (31) is elastically connected to the connecting seat (5) through a fourth spring (32), and one end of the first abutting rod (31) abuts against a first abutting frame (33), which is slidably connected to the connecting seat (5).

8. The automotive wiper motor performance testing device according to claim 7, characterized in that: The upper end of the first abutting frame (33) abuts against the second abutting rod (34), the second abutting rod (34) is slidably connected to the connecting seat (5), and an abutting ring (35) is fixed on the second abutting rod (34). A third abutting rod (36) is fixed on the brush block (8). The third abutting rod (36) is elastically connected to the connecting seat (5) through the fifth spring (37), and the third abutting rod (36) abuts against the abutting ring (35).

9. The automotive wiper motor performance testing device according to claim 1, characterized in that: An extension block (38) is fixed on one side of the brush block (8), and a comb tooth frame (39) is provided on the brush block (8). The comb tooth frame (39) is elastically connected to the extension block (38) through a sixth spring (391). A sliding bracket (40) is fixed on the connecting seat (5). An annular scraper (41) is slidably connected on the sliding bracket (40). A seventh spring (42) is connected between the annular scraper (41) and the sliding bracket (40). A second abutment frame (43) is fixed on the annular scraper (41).

10. The automotive wiper motor performance testing device according to claim 9, characterized in that: The second contact frame (43) is provided with a second contact head (44) below it. The second contact head (44) is elastically connected to the turntable (9) through an eighth spring (45), and the lower end of the second contact head (44) abuts against a rocker (46), which is rotatably connected to the turntable (9).

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