A motor cogging torque testing device

Abstract

This application discloses a motor cogging torque testing device, belonging to the field of motor performance testing. It includes a test chamber containing a worktable. A support plate for placing the motor under test is rotatably mounted on the top surface of the worktable. A rotating assembly for driving the support plate to rotate is provided on the worktable. A top plate and a height adjustment assembly for adjusting the height of the top plate are also provided on the worktable. A torque sensor is mounted on the bottom surface of the top plate, and the torque sensor is connected to the shaft of the motor under test via a coupling. A horizontally arranged bidirectional lead screw is mounted on the support plate. Two clamping blocks for holding the stator of the motor under test are sleeved around the outer periphery of the bidirectional lead screw. The clamping blocks are threadedly engaged with the bidirectional lead screw. A self-aligning assembly for adjusting the position of the bidirectional lead screw is provided on the support plate. This application achieves high testing accuracy.

Description

Technical Field

[0001] This application relates to the field of motor performance testing, and in particular to a motor cogging torque testing device. Background Technology

[0002] Motor torque is the rotational torque output on the motor shaft, representing the motor's ability to drive a load. Essentially, it is the net output torque after the electromagnetic torque overcomes internal losses (friction, wind resistance, iron loss, copper loss, etc.). Motor torque testing is a crucial step in motor performance evaluation, especially in the field of precision motors, where the uniformity and stability of torque directly affect the motor's operating efficiency and lifespan. Currently, the market demand for high-precision motors is growing, placing higher demands on the accuracy and reliability of motor cogging torque testing devices.

[0003] Conventional motor cogging torque testing devices mostly use mechanical couplings for transmission, which transmit torque through rigid connections. This method is simple in structure and low in cost. However, mechanical couplings are prone to concentricity deviations due to assembly errors, which can affect the testing accuracy. Summary of the Invention

[0004] To improve the problem of poor accuracy in motor torque testing, this application provides a motor cogging torque testing device.

[0005] The motor cogging torque testing device provided in this application adopts the following technical solution:

[0006] A motor cogging torque testing device includes a test box, a workbench installed inside the test box, a support plate for placing the motor under test rotatably mounted on the top surface of the workbench, a rotating assembly for driving the support plate to rotate on the workbench, a top plate and a height adjustment assembly for adjusting the height of the top plate on the workbench, a torque sensor mounted on the bottom surface of the top plate, the torque sensor being connected to the shaft of the motor under test via a coupling, a horizontally arranged bidirectional lead screw mounted on the support plate, two clamping blocks for clamping the stator of the motor under test being sleeved on the outer periphery of the bidirectional lead screw, the clamping blocks being threadedly engaged with the bidirectional lead screw, and a self-aligning assembly for adjusting the position of the bidirectional lead screw on the support plate.

[0007] By adopting the above technical solution, the position of the bidirectional lead screw is first adjusted using the self-aligning component, so that when the two clamping blocks clamp and fix the stator of the motor under test, the shaft of the motor under test and the shaft of the torque sensor are concentrically set. Then, the shaft of the motor under test and the shaft of the torque sensor are locked and fixed by the coupling. The rotating component drives the stator of the motor under test to rotate, so as to test the torque of the motor under test, with high testing accuracy.

[0008] Preferably, the coupling includes an upper connecting plate fixed to the bottom of the torque sensor and a lower connecting plate sleeved on the outer periphery of the motor shaft to be tested. The top surface of the lower connecting plate has a mounting slot for the motor shaft to be tested to pass through. The side surface of the lower connecting plate has a threaded hole, and a locking screw is threaded into the threaded hole. Two lower connecting blocks are fixed to the top surface of the lower connecting plate, and two upper connecting blocks are fixed to the bottom surface of the upper connecting plate. The bottom surface of the upper connecting block has a positioning groove for inserting the lower connecting block. The side surface of the upper connecting block has a positioning hole one, and a positioning rod passes through the positioning hole one. The side surface of the lower connecting block has a positioning hole two for passing through the positioning rod.

[0009] By adopting the above technical solution, the lower connecting block is inserted into the positioning groove, and positioning hole one and positioning hole two are aligned. The positioning rod is passed through positioning hole one and positioning hole two. Then, the motor to be tested is placed on the bearing plate. The clamping block is used to clamp and fix the stator of the motor to be tested. Then, the top plate is moved downward by the height adjustment component so that the mounting groove of the lower connecting plate is fitted onto the outer periphery of the shaft of the motor to be tested. Finally, the locking screw is used to lock and fix the lower connecting plate to the shaft of the motor to be tested.

[0010] Preferably, V-shaped grooves are formed on the inner sides of the two clamping blocks, a slider is fixed on the bottom surface of the clamping blocks, a slide rail is fixed on the top surface of the bearing plate, and the slider slides along the length direction of the bearing plate via the slide rail.

[0011] By adopting the above technical solution, the slider and slide rail provide guidance for the clamping block, so that the clamping block always moves along the length of the bearing plate. The V-groove design makes the clamping block more stable in clamping and fixing the stator of the motor under test, and the concentricity control of the motor shaft and the torque sensor shaft is more accurate.

[0012] Preferably, the self-aligning assembly includes a centering base, which includes a cylindrical base and a centering rod fixed to the top surface of the cylindrical base. The bottom surface of the upper connecting plate has a centering through hole for inserting the centering rod. The top surface of the bearing plate has two bearing blocks fixed. A rotating ring is sleeved on the outer periphery of the bidirectional lead screw, and the rotating ring is rotatably connected to the bidirectional lead screw. The side of the bearing block has a mounting through hole for passing through the rotating ring. The bearing block includes a detachable block and a fixed block fixed to the top surface of the bearing plate. The detachable block is fixedly connected to the fixed block by a mounting screw. The detachable block and the fixed block are used to clamp and fix the rotating ring.

[0013] By adopting the above technical solution, the centering base is first placed on the bearing plate, and the bidirectional lead screw is rotated to clamp and fix the cylindrical base. Then, the top plate is moved downward and the position of the bidirectional lead screw is adjusted so that the centering rod is inserted into the centering through hole of the upper connecting plate. Then, the detachable block and the fixed block are fixedly connected by the mounting screw. The detachable block and the fixed block clamp and fix the rotating ring, so that the shaft of the motor to be tested and the shaft of the torque sensor are kept concentric, reducing the influence of motor tolerance on the tooth cogging torque test.

[0014] Preferably, the rotating assembly includes a first synchronous wheel and a second synchronous wheel rotatably mounted on the workbench. A synchronous belt is wound around the outer periphery of the first synchronous wheel and the second synchronous wheel. A servo motor is fixed on the workbench. The output end of the servo motor is coaxially and fixedly connected to the synchronous wheel. The second synchronous wheel is fixedly connected to the bottom surface of the support plate.

[0015] By adopting the above technical solution, the servo motor is started, which drives the first synchronous wheel to rotate. The first synchronous wheel drives the bearing plate to rotate through the synchronous belt and the second synchronous wheel, so that the bearing plate drives the motor under test to rotate slowly.

[0016] Preferably, the top surface of the support plate is equipped with an adjusting block for placing the stator of the motor under test. The top surface of the adjusting block has a clearance groove for passing through the shaft of the motor under test. The bottom surface of the adjusting block has two limiting holes. The top surface of the support plate is fixed with a limiting rod, which is inserted into the limiting hole. The support plate is provided with an adjusting component for adjusting the height of the adjusting block.

[0017] By adopting the above technical solution, the motor under test is placed on the top surface of the adjusting block, and the shaft of the motor under test extends into the clearance groove. Since the size of the motors under test is different, the height of the adjusting block is adjusted so that the clamping block can clamp and fix the stator of the motor under test.

[0018] Preferably, the adjustment assembly includes a limiting sleeve fixed to the bottom surface of the adjustment block, and an adjustment sleeve is sleeved on the outer periphery of the limiting sleeve. The limiting sleeve and the adjustment sleeve are threadedly engaged, and both the limiting sleeve and the adjustment sleeve are rotatably connected to the worktable.

[0019] By adopting the above technical solution, the limiting rod and the limiting hole limit the adjusting block, so that the adjusting block always moves vertically. Rotating the adjusting sleeve causes the limiting sleeve and the adjusting block to move vertically.

[0020] Preferably, two vertically arranged telescopic rods are fixed between the top plate and the worktable. The height adjustment component includes a height adjustment screw rotatably installed on the top surface of the worktable. The height adjustment screw is vertically arranged, and the top plate is sleeved on the outer periphery of the height adjustment screw. The top plate and the height adjustment screw are threadedly engaged.

[0021] By adopting the above technical solution, the telescopic rod provides guidance to the top plate, and rotating the height adjustment screw causes the top plate to move vertically, thereby adjusting the height of the torque sensor.

[0022] Preferably, the test box includes an industrial control computer box, with casters installed on all four sides of the bottom surface of the industrial control computer box, an operating table slidably installed on the top of the industrial control computer box, a mounting box with a side opening installed on the top surface of the industrial control computer box, the operating table being fixed inside the mounting box, and a display screen being installed on the top of the mounting box.

[0023] By adopting the above technical solution, the start and stop of the servo motor can be controlled on the operating console, and the generated XY diagram can be viewed on the display screen.

[0024] Preferably, the inner wall of the mounting box is equipped with two gratings, which are located on both sides of the worktable.

[0025] By adopting the above technical solution, gratings are set on both sides of the workbench. If the operator's hand blocks the light beam, the grating will immediately output a stop signal to stop the equipment. The equipment can only be restarted after the operator has been confirmed to have left and reset, thereby avoiding injury to the operator due to misoperation.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. First, adjust the position of the bidirectional lead screw using the self-aligning assembly so that when the two clamping blocks clamp and fix the stator of the motor under test, the shaft of the motor under test and the shaft of the torque sensor are concentric. Then, lock and fix the shaft of the motor under test and the shaft of the torque sensor using the coupling. Use the rotating assembly to drive the stator of the motor under test to rotate in order to test the torque of the motor under test. The test accuracy is high.

[0028] 2. Insert the lower connecting block into the positioning slot, aligning positioning hole one and positioning hole two. Pass the positioning rod through positioning hole one and positioning hole two, then place the motor to be tested on the bearing plate. Use the clamping block to clamp and fix the stator of the motor to be tested. Then use the height adjustment component to move the top plate downward so that the mounting slot of the lower connecting plate is fitted onto the outer circumference of the shaft of the motor to be tested. Finally, use the locking screw to lock and fix the lower connecting plate to the shaft of the motor to be tested.

[0029] 3. First, place the centering base on the bearing plate, rotate the double-acting screw to clamp and fix the clamping block to the cylindrical base, then move the top plate downward and adjust the position of the double-acting screw so that the centering rod is inserted into the centering through hole of the upper connecting plate. Then, use the mounting screw to fix the detachable block and the fixed block. The detachable block and the fixed block clamp and fix the rotating ring, so that the shaft of the motor to be tested and the shaft of the torque sensor are kept concentric, reducing the influence of motor tolerance on the cogging torque test. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the motor cogging torque testing device according to an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the structure of the workbench of the motor cogging torque testing device according to an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the coupling in the motor cogging torque testing device according to an embodiment of this application.

[0033] Figure 4 This is a schematic diagram of the clamping block and the bidirectional lead screw in the motor cogging torque testing device according to an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the torque sensor and centering base in the motor cogging torque testing device according to an embodiment of this application.

[0035] Figure 6 This is a schematic diagram of the structure of the adjusting block in the motor cogging torque testing device according to an embodiment of this application.

[0036] Reference numerals: 1. Test box; 11. Industrial control computer box; 12. Casters; 13. Operating table; 14. Mounting box; 15. Display screen; 16. Grating; 2. Workbench; 21. Bearing plate; 22. Double-acting lead screw; 221. Rotating ring; 23. Clamping block; 231. V-groove; 24. Slider; 25. Slide rail; 26. Bearing block; 261. Detachable block; 262. Fixing block; 27. Mounting through hole; 28. Mounting screw; 3. Torque sensor; 4. Top plate; 41. Telescopic rod; 42. Height adjustment screw; 5. Coupling; 51. Upper connecting plate 511. Centering through hole; 52. Lower connecting plate; 521. Mounting through groove; 522. Threaded hole; 523. Locking screw; 53. Upper connecting block; 531. Positioning groove; 532. Positioning hole one; 54. Lower connecting block; 541. Positioning hole two; 55. Positioning rod; 6. Centering base; 61. Cylindrical base; 62. Centering rod; 7. Synchronous pulley one; 71. Synchronous pulley two; 72. Synchronous belt; 73. Servo motor; 8. Adjusting block; 81. Clearance through groove; 82. Limiting hole; 83. Limiting rod; 84. Limiting sleeve; 85. Adjusting sleeve. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0038] This application discloses a device for testing the cogging torque of a motor. (Refer to...) Figure 1 The motor cogging torque testing device includes a test box 1, which includes an industrial control computer chassis 11. Casters 12 are installed around the bottom of the chassis 11. An operating platform 13 is slidably mounted on the top of the chassis 11. A mounting box 14 with a side opening is mounted on the top surface of the chassis 11, and a display screen 15 is mounted on the top of the mounting box 14. Two optical gratings 16 are installed on the inner wall of the mounting box 14, located on opposite sides of the operating platform 2.

[0039] Reference Figure 1 and Figure 2 A workbench 2 is fixed inside the mounting box 14. A support plate 21 for placing the motor under test is rotatably mounted on the top surface of the workbench 2. Synchronous pulley 1 7 and synchronous pulley 2 71 are rotatably mounted on the top surface of the workbench 2. Synchronous pulley 2 71 is fixedly connected to the bottom surface of the support plate 21. A synchronous belt 72 is wound around the outer periphery of synchronous pulley 1 7 and synchronous pulley 2 71. A servo motor 73 is fixed on the workbench 2. The output end of the servo motor 73 is coaxially fixedly connected to synchronous pulley 1 7. When the servo motor 73 is started, it drives synchronous pulley 1 7 to rotate. Synchronous pulley 1 7, through the synchronous belt 72 and synchronous pulley 2 71, drives the support plate 21 to rotate, causing the support plate 21 to slowly rotate the motor under test.

[0040] Reference Figure 2 and Figure 3 A top plate 4 is provided on the workbench 2. A torque sensor 3 is installed on the bottom surface of the top plate 4. The torque sensor 3 is connected to the shaft of the motor to be tested through a coupling 5. Two vertically arranged telescopic rods 41 are fixed between the top plate 4 and the workbench 2. A vertically arranged height adjustment screw 42 is rotatably installed on the top surface of the workbench 2. The top plate 4 is sleeved on the outer periphery of the height adjustment screw 42, and the top plate 4 and the height adjustment screw 42 are threadedly connected.

[0041] Reference Figure 2 and Figure 3The coupling 5 includes an upper connecting plate 51 fixed to the bottom of the torque sensor 3 and a lower connecting plate 52 sleeved on the outer periphery of the motor shaft to be tested. The top surface of the lower connecting plate 52 has a mounting slot 521 for the motor shaft to be tested to pass through. A threaded hole 522 is provided on the side of the lower connecting plate 52, and a locking screw 523 is threaded into the threaded hole 522. Two lower connecting blocks 54 are fixed to the top surface of the lower connecting plate 52, and two upper connecting blocks 53 are fixed to the bottom surface of the upper connecting plate 51. A positioning groove 531 for inserting the lower connecting blocks 54 is provided on the bottom surface of each upper connecting block 53. A positioning hole 532 is provided on the side of each upper connecting block 53, and a positioning rod 55 passes through the positioning hole 532. A second positioning hole 541 is provided on the side of each lower connecting block 54 for the positioning rod 55 to pass through.

[0042] Reference Figure 3 and Figure 4 A horizontally arranged bidirectional lead screw 22 is mounted on the support plate 21. Two clamping blocks 23 for holding the stator of the motor under test are sleeved on the outer periphery of the bidirectional lead screw 22. The clamping blocks 23 are threadedly engaged with the bidirectional lead screw 22. V-shaped grooves 231 are formed on the opposite inner sides of the two clamping blocks 23. A slider 24 is fixed on the bottom surface of the clamping blocks 23, and a slide rail 25 is fixed on the top surface of the support plate 21. The slider 24 slides along the length of the support plate 21 via the slide rail 25.

[0043] Reference Figure 3 , Figure 4 and Figure 5 A centering base 6 is detachably mounted on the support plate 21. The centering base 6 includes a cylindrical base 61 and a centering rod 62 fixed to the top surface of the cylindrical base 61. The outer diameter of the cylindrical base 61 is the standard size of the motor under test. A centering through hole 511 for inserting the centering rod 62 is opened on the bottom surface of the upper connecting plate 51. A rotating ring 221 is sleeved on the outer circumference of the bidirectional lead screw 22, and the rotating ring 221 is rotatably connected to the bidirectional lead screw 22. Two support blocks 26 are fixed on the top surface of the support plate 21. The side of the support block 26 has a mounting through hole 27 for the rotating ring 221 to pass through. The support block 26 includes a detachable block 261 and a fixed block 262 fixed to the top surface of the support plate 21. The detachable block 261 is fixedly connected to the fixed block 262 by a mounting screw 28. The detachable block 261 and the fixed block 262 are used to clamp and fix the rotating ring 221.

[0044] First, place the centering base 6 on the bearing plate 21, rotate the bidirectional lead screw 22 so that the clamping block 23 clamps and fixes the cylindrical base 61. Then, move the top plate 4 downward and adjust the position of the bidirectional lead screw 22 so that the centering rod 62 is inserted into the centering through hole 511 of the upper connecting plate 51. Then, use the mounting screw 28 to fix the detachable block 261 and the fixed block 262. The detachable block 261 and the fixed block 262 clamp and fix the rotating ring 221 so that the shaft of the motor to be tested and the shaft of the torque sensor 3 are kept concentric, reducing the influence of motor tolerance on the toothed torque test.

[0045] Reference Figure 4 and Figure 6 An adjusting block 8 for placing the stator of the motor under test is installed on the top surface of the support plate 21. A clearance slot 81 for the shaft of the motor under test is provided on the top surface of the adjusting block 8. Two limiting holes 82 are provided on the bottom surface of the adjusting block 8. A limiting rod 83 is fixed to the top surface of the support plate 21 and inserted into the limiting holes 82. A limiting sleeve 84 is fixed to the bottom surface of the adjusting block 8. An adjusting sleeve 85 is fitted around the outer circumference of the limiting sleeve 84. The limiting sleeve 84 and the adjusting sleeve 85 are threadedly connected. Both the limiting sleeve 84 and the adjusting sleeve 85 are rotatably connected to the worktable 2.

[0046] The motor to be tested is placed on the top surface of the adjusting block 8, and the shaft of the motor to be tested extends into the clearance groove 81. Since the size of the motors to be tested is different, by rotating the adjusting sleeve 85, the limiting sleeve 84 and the adjusting block 8 are displaced vertically, thereby adjusting the height of the adjusting block 8 so that the clamping block 23 can clamp and fix the stator of the motor to be tested.

[0047] The implementation principle of the motor cogging torque testing device in this application embodiment is as follows: First, the position of the bidirectional lead screw 22 is adjusted by the centering base 6 so that when the two clamping blocks 23 clamp and fix the stator of the motor under test, the shaft of the motor under test and the shaft of the torque sensor 3 are concentrically set. Then, the shaft of the motor under test and the shaft of the torque sensor 3 are locked and fixed by the coupling 5. The servo motor 73 is started, and the bearing plate 21 drives the stator of the motor under test to rotate, so as to test the torque of the motor under test. The test accuracy is high.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electric machine cogging torque testing device, characterized by: The test box (1) is equipped with a workbench (2) and a support plate (21) for placing the motor under test is rotatably mounted on the top surface of the workbench (2). A rotating component for driving the support plate (21) to rotate is provided on the workbench (2). A top plate (4) and a height adjustment component for adjusting the height of the top plate (4) are provided on the workbench (2). A torque sensor (3) is installed on the bottom surface of the top plate (4). The torque sensor (3) is connected to the shaft of the motor under test through a coupling (5). A horizontally arranged double-acting screw (22) is installed on the support plate (21). Two clamping blocks (23) for clamping the stator of the motor under test are sleeved on the outer periphery of the double-acting screw (22). The clamping blocks (23) are threadedly driven to the double-acting screw (22). A self-aligning component for adjusting the position of the double-acting screw (22) is provided on the support plate (21). The coupling (5) includes an upper connecting plate (51) fixed to the bottom of the torque sensor (3) and a lower connecting plate (52) sleeved on the outer periphery of the motor shaft to be tested. The top surface of the lower connecting plate (52) is provided with a mounting slot (521) for the motor shaft to be tested to pass through. The side surface of the lower connecting plate (52) is provided with a threaded hole (522). A locking screw (523) is threaded into the threaded hole (522). Two lower connecting plates (52) are fixed on the top surface of the lower connecting plate (52). The connecting block (54) has two upper connecting blocks (53) fixed on the bottom surface of the upper connecting plate (51). The bottom surface of the upper connecting block (53) is provided with a positioning groove (531) for inserting the lower connecting block (54). The side of the upper connecting block (53) is provided with a positioning hole one (532). A positioning rod (55) is inserted into the positioning hole one (532). The side of the lower connecting block (54) is provided with a positioning hole two (541) for inserting the positioning rod (55). The self-aligning assembly includes a centering base (6), which includes a cylindrical base (61) and a centering rod (62) fixed to the top surface of the cylindrical base (61). The bottom surface of the upper connecting plate (51) is provided with a centering through hole (511) for inserting the centering rod (62). The top surface of the bearing plate (21) is fixed with two bearing blocks (26). A rotating ring (221) is sleeved on the outer periphery of the bidirectional lead screw (22). The rotating ring (221) and the bidirectional lead screw are connected to each other. The rod (22) is rotatably connected. The side of the bearing block (26) is provided with a mounting through hole (27) for the rotating ring (221) to pass through. The bearing block (26) includes a detachable block (261) and a fixing block (262) fixed to the top surface of the bearing plate (21). The detachable block (261) is fixedly connected to the fixing block (262) by a mounting screw (28). The detachable block (261) and the fixing block (262) are used to clamp and fix the rotating ring (221).

2. The motor cogging torque testing device of claim 1, wherein: V-shaped grooves (231) are provided on the inner sides of the two clamping blocks (23). A slider (24) is fixed on the bottom surface of the clamping block (23). A slide rail (25) is fixed on the top surface of the bearing plate (21). The slider (24) slides along the length direction of the bearing plate (21) through the slide rail (25).

3. The motor cogging torque testing device of claim 1, wherein: The rotating assembly includes a first synchronous wheel (7) and a second synchronous wheel (71) rotatably mounted on the worktable (2). A synchronous belt (72) is wrapped around the outer periphery of the first synchronous wheel (7) and the second synchronous wheel (71). A servo motor (73) is fixed on the worktable (2). The output end of the servo motor (73) is coaxially and fixedly connected to the first synchronous wheel (7). The second synchronous wheel (71) is fixedly connected to the bottom surface of the support plate (21).

4. The motor cogging torque testing device according to claim 1, characterized in that: The top surface of the support plate (21) is equipped with an adjustment block (8) for placing the stator of the motor under test. The top surface of the adjustment block (8) is provided with a clearance slot (81) for passing through the shaft of the motor under test. The bottom surface of the adjustment block (8) is provided with two limiting holes (82). The top surface of the support plate (21) is fixed with a limiting rod (83). The limiting rod (83) is inserted into the limiting hole (82). The support plate (21) is provided with an adjustment component for adjusting the height of the adjustment block (8).

5. The motor cogging torque testing device according to claim 4, characterized in that: The adjustment assembly includes a limiting sleeve (84) fixed to the bottom surface of the adjustment block (8), and an adjustment sleeve (85) is sleeved on the outer periphery of the limiting sleeve (84). The limiting sleeve (84) and the adjustment sleeve (85) are threadedly engaged. Both the limiting sleeve (84) and the adjustment sleeve (85) are rotatably connected to the worktable (2).

6. The motor cogging torque testing device according to claim 1, characterized in that: Two vertically arranged telescopic rods (41) are fixed between the top plate (4) and the workbench (2). The height adjustment component includes a height adjustment screw (42) rotatably installed on the top surface of the workbench (2). The height adjustment screw (42) is vertically arranged. The top plate (4) is sleeved on the outer periphery of the height adjustment screw (42). The top plate (4) and the height adjustment screw (42) are threadedly connected.

7. The motor cogging torque testing device according to claim 1, characterized in that: The test box (1) includes an industrial control computer box (11), with casters (12) installed around the bottom of the industrial control computer box (11), an operating table (13) slidably installed on the top of the industrial control computer box (11), and a mounting box (14) with a side opening installed on the top surface of the industrial control computer box (11). The workbench (2) is fixed inside the mounting box (14), and a display screen (15) is installed on the top of the mounting box (14).

8. The motor cogging torque testing device according to claim 7, characterized in that: The inner wall of the mounting box (14) is equipped with two gratings (16), which are located on both sides of the worktable (2).

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