Axle reduction gearbox testing device

Abstract

The utility model discloses an axle reduction gearbox testing device, which belongs to the technical field of automobile part testing equipment and comprises a testing base, two brake loading devices, a positioning device, a driving device, a driving support, a vibration collecting sensor, a PLC (programmable logic controller) control cabinet and an NVH (noise vibration and harshness) testing and collecting system. The two brake loading devices and the positioning device are arranged on the test base in a sliding mode, the positioning device is located between the two brake loading devices, the driving support is arranged on the test base, the driving device is arranged on the driving support in a lifting and translation mode, and the two brake loading devices and the driving device are all connected with the PLC control cabinet. The positioning device is used for fixing the axle reduction gearbox, the vibration collection sensor is installed on the axle reduction gearbox, and the vibration collection sensor is connected with the NVH test acquisition system. The utility model provides an axle reduction gearbox testing device which is simple in structure, so as to solve the problems that the existing axle reduction gearbox testing process is backward, the testing effect is not accurate and the efficiency is low.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive parts testing equipment, and relates to a fixture for leak testing of the main reducing seal of the axle housing. Background Technology

[0002] Currently, conventional testing of electric drive gearboxes for axles involves directly connecting the gearbox to the motor. Operators rely on visual inspection, hearing, and touch to determine if there are quality issues such as gear impacts, abnormal noises, or overheating. Other methods are unavailable. Operators are also affected by ambient noise, impacting the accuracy of their assessments. The simplified no-load testing method fails to simulate issues arising from different vehicle operating conditions. The process is outdated, lacking data acquisition and analysis capabilities, quantitative indicators for evaluating test results, and a high rate of defective products, making subsequent traceability and analysis impossible. Another existing technology involves assembling the axle gearbox assembly with other axle parts to form an axle assembly. Testing the axle assembly during break-in is then used to detect and track quality issues such as impacts and abnormal noises in the gearbox. Once a problem is found, the gearbox is removed from the axle assembly for rework, which is labor-intensive, time-consuming, and inefficient. Utility Model Content

[0003] This invention provides a vehicle axle reduction gearbox testing device to solve the problems of outdated testing technology, inaccurate testing results, and low efficiency in existing vehicle axle reduction gearbox testing.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: It includes a test base, two braking loading devices, a positioning device, a drive device, a drive bracket, a vibration collection sensor, a PLC control cabinet, and an NVH test acquisition system. The two braking loading devices and the positioning device are slidably mounted on the test base, with the positioning device located between the two braking loading devices. The drive bracket is mounted on the test base, and the drive device is vertically and horizontally mounted on the drive bracket. Both braking loading devices and the drive device are connected to the PLC control cabinet. The positioning device is used to fix the axle reduction gearbox. The vibration collection sensor... The sensor is installed on the axle reduction gearbox. The vibration collection sensor is connected to the NVH test and acquisition system. The two braking loading devices are respectively connected to the half-shaft splines on both sides of the lower part of the axle reduction gearbox. The loading torque is changed through the PLC control cabinet. The drive device is connected to the input spline shaft at the upper part of the axle reduction gearbox. The PLC control cabinet controls the drive device to rotate, accelerate, decelerate, and reverse in various working conditions to test and break in the axle reduction gearbox. The vibration collection sensor uploads the noise and vibration values ​​to the NVH test and acquisition system. The NVH test and acquisition system classifies and judges the axle reduction gearbox by setting various levels of noise and vibration value standards.

[0005] A more specific technical solution to the above technical solution may be as follows: The test base includes a loading base and two braking bases. The loading base is located between the two braking bases. The loading base is provided with a loading guide rail and a loading screw and nut pair. The positioning device is slidably connected to the loading guide rail and connected to the nut seat of the loading screw and nut pair. The loading screw and nut pair is driven by a loading translation servo motor. The braking base is provided with a braking guide rail and a braking screw and nut pair. The braking loading device is slidably connected to the braking guide rail and connected to the braking screw and nut pair. The lead screw and nut assembly are connected to the nut seat. The brake lead screw and nut assembly is driven by a brake translation servo motor. Both the loading translation servo motor and the brake translation servo motor are connected to the PLC control cabinet. The axle reducer is picked up by a robot or manually hoisted onto the positioning device and fixed. The PLC control cabinet controls the loading translation servo motor to drive the lead screw of the loading lead screw and nut assembly to rotate, causing the positioning device to move between the two brake loading devices. The PLC control cabinet also controls the brake translation servo motor to drive the two brake loading devices to move towards the positioning device.

[0006] Furthermore: the positioning device includes a positioning housing, at the bottom of which a positioning guide rail slider and a positioning guide rail clamp are provided, adapted to the feeding guide rail. The positioning guide rail clamp is connected to the PLC control cabinet. Braking holes are provided on both sides of the positioning housing. A positioning housing top plate is provided on the top of the positioning housing. A gearbox annular positioning plate and a clamping screw and nut assembly are connected to the positioning housing top plate. The clamping screw and nut assembly is connected through the gearbox pressure plate. A positioning cone pin is provided on the gearbox annular positioning plate. The axle... The gearbox is placed on the gearbox annular positioning plate, and the positioning cone pin is inserted into the positioning hole of the axle gearbox. At this time, the half-shaft splines on both sides of the lower part of the axle gearbox are aligned with the brake holes on both sides of the positioning box. The gearbox pressure plate is pressed onto the axle gearbox by manually tightening the screw nut pair with a wrench, thus positioning and fixing the axle gearbox. When the axle gearbox is moved to the position between the two braking loading devices, the PLC control cabinet controls the positioning guide rail clamp to clamp the feeding guide rail to prevent displacement.

[0007] Furthermore: the braking loading device includes a brake base plate, the bottom of which is provided with a brake guide rail slider and a brake guide rail clamp adapted to the brake guide rail; the top of the brake base plate is provided with a brake bracket, a brake torque sensor, and a brake bearing seat; a magnetic powder brake is mounted on the brake bracket; a flange shaft is connected in the middle of the magnetic powder brake; the flange shaft is connected to the brake torque sensor; the brake torque sensor is connected to a brake diaphragm coupling; the brake diaphragm coupling is connected to a brake drive shaft; and the brake drive shaft passes through the brake bearing seat. The end of the brake drive shaft is connected to the spline load drive shaft via a brake hydraulic expansion sleeve. The brake guide clamp, the magnetic powder brake, and the brake torque sensor are all connected to the PLC control cabinet. The spline load drive shaft passes through the brake hole of the positioning box and is inserted into the spline of the half shaft gear of the axle reduction gearbox. The PLC control cabinet controls the brake guide clamp to clamp the brake guide to prevent displacement. The PLC control cabinet changes the loading torque by changing the magnetic current of the magnetic powder brake. The brake torque sensor transmits the sensed rotational speed to the PLC control cabinet.

[0008] Furthermore: the drive bracket includes a bracket base, an X-plate, a Y-plate, and a lifting support. The bracket base is mounted on one of the brake bases. The bracket base is provided with an X-axis guide rail and an X-axis lead screw and nut pair. The bottom of the X-plate is provided with an X-slider and an X-axis guide rail clamp adapted to the X-axis guide rail. The X-plate is connected to the nut seat of the X-axis lead screw and nut pair, which is driven by an X-axis translation servo motor. The X-plate is provided with a Y-axis guide rail and a Y-axis lead screw and nut pair. The bottom of the Y-plate is provided with a Y-slider and a Y-axis guide rail clamp adapted to the Y-axis guide rail. The Y-base plate is connected to the nut seat of the Y-axis lead screw nut assembly, which is driven by a Y-axis translation servo motor. The driving device includes a lifting base, the bottom of which is provided with a motor bracket, a motor torque sensor, and a motor bearing seat. A drive motor is mounted on the motor bracket, and the drive shaft of the drive motor is connected to the motor torque sensor. The motor torque sensor is connected to a motor diaphragm coupling, which is connected to a motor transmission shaft. The motor transmission shaft is mounted inside the motor bearing seat, and the end of the motor transmission shaft is connected to a motor spline sleeve via a motor hydraulic expansion sleeve. The lifting base is connected to the lifting platform, which has a lifting seat on top. The lifting seat has a lifting guide rail and a lifting screw and nut assembly. The lifting support is mounted on the Y-base plate. The lifting support has a lifting groove and a lifting guide rail clamp that are adapted to the lifting guide rail. The lifting support also has a lifting servo motor, and the lifting screw and nut assembly is driven by the lifting servo motor. The X-guide rail clamp, the X-axis translation servo motor, the Y-guide rail clamp, the Y-axis translation servo motor, the lifting guide rail clamp, the lifting servo motor, the drive motor, and the motor torque sensor are all connected to the PLC. The control cabinet is connected to the PLC control cabinet, which drives the X-axis translation servo motor, the Y-axis translation servo motor, and the lifting servo motor to precisely insert the motor spline sleeve into the input spline shaft of the axle reducer. Then, the X-axis guide rail clamp, the Y-axis guide rail clamp, and the lifting guide rail clamp are controlled to prevent displacement. The PLC control cabinet then controls the drive motor to rotate, accelerate, decelerate, and reverse, etc., to test and break in the axle reducer. The motor torque sensor transmits the sensed speed to the PLC control cabinet.

[0009] Furthermore, the bottom of the test base is provided with multiple shock-absorbing pads.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: the axle reduction gearbox is fixed by the positioning device, the braking loading device is connected to the half shaft spline of the axle reduction gearbox, the drive device is connected to the input spline shaft of the axle reduction gearbox, and various working conditions are simulated by changing the loading torque of the braking loading device and changing the speed of the drive device. The NVH test acquisition system performs test classification of the axle reduction gearbox by setting various levels of noise and vibration value standards, which not only improves production efficiency but also reduces enterprise production costs and prevents unqualified products from flowing out. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of the test base in this utility model.

[0013] Figure 3 This is a schematic diagram of the braking loading device in this utility model.

[0014] Figure 4 This is a schematic diagram of the positioning device in this utility model.

[0015] Figure 5 This is a schematic diagram of the drive bracket in this utility model.

[0016] Figure 6 This is a schematic diagram of the drive device in this utility model.

[0017] In the diagram: 1. Test base; 11. Vibration collection sensor; 12. Feeding base; 13. Feeding guide rail; 14. Feeding screw and nut pair; 15. Brake base; 16. Brake guide rail; 17. Brake screw and nut pair; 18. Brake translation servo motor; 19. Vibration damping pad; 2. Brake loading device; 21. Brake base plate; 22. Brake guide rail slider; 221. Brake guide rail clamp; 23. Magnetic powder brake; 231. Flange shaft; 24. Brake bracket; 25. Brake torque sensor; 26. Brake diaphragm coupling; 27. Brake bearing seat; 28. Brake drive shaft; 29. ​​Brake hydraulic expansion sleeve; 291. Splined load drive shaft; 3. Positioning device; 31. Positioning guide rail slider; 311. Positioning guide rail clamp; 32. Brake hole; 33. Positioning box; 34. 35. Positioning box top plate; 36. Gearbox annular positioning plate; 37. Clamping screw and nut pair; 38. Gearbox pressure plate; 4. Positioning cone pin; 4. Drive unit; 49. Motor spline sleeve; 40. Motor hydraulic tensioning sleeve; 41. Motor drive shaft; 42. Motor bearing housing; 43. Motor diaphragm coupling; 44. Motor torque sensor; 45. Motor bracket; 46. Drive motor; 47. Lifting base; 48. Lifting seat; 49. Lifting guide rail; 50. Drive bracket; 51. Bracket base; 52. X-guide rail; 53. X-base plate; 54. X-slider; 541. X-guide rail clamp; 55. Y-guide rail; 56. Y-base plate; 57. Y-guide rail clamp; 58. Lifting support; 59. Lifting servo motor; 6. PLC control cabinet; 7. NVH test and acquisition system; 8. Axle gearbox. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and examples:

[0019] like Figures 1 to 6 The axle reduction gearbox testing device shown includes a test base 1, two braking loading devices 2, a positioning device 3, a drive device 4, a drive bracket 5, a vibration collection sensor 11, a PLC control cabinet 6, and an NVH test acquisition system 7. The two braking loading devices 2 and the positioning device 3 are slidably mounted on the test base 1, with the positioning device 3 located between the two braking loading devices 2. The drive bracket 5 is mounted on the test base 1, and the drive device 4 is mounted on the drive bracket 5 in a height-lifting and lateral manner. Both the two braking loading devices 2 and the drive device 4 are connected to the PLC control cabinet 6. The positioning device 3 is used to fix the axle reduction gearbox 8. The vibration collection sensor 11 is mounted on the axle reduction gearbox 8 and is connected to the NVH test acquisition system 7.

[0020] The test base 1 includes a loading base 12 and two braking bases 15. The test base 1 is T-shaped, with the two braking bases 15 located on both sides of the loading base 12. The loading base 12 is equipped with a loading guide rail 13 and a loading screw nut assembly 14. The loading guide rail 13 and the loading screw nut assembly 14 are fixed to the loading base 12 by bolt assemblies. This is a common connection method and will not be described in detail later. The positioning device 3 is slidably connected to the loading guide rail 13, and the positioning device 3 is connected to the nut of the loading screw nut assembly 14. The base is connected to the feed screw nut assembly 14, which is driven by the feed translation servo motor. The brake base 15 is equipped with a brake guide rail 16 and a brake screw nut assembly 17. The brake loading device 2 is slidably connected to the brake guide rail 16 and connected to the nut seat of the brake screw nut assembly 17. The brake screw nut assembly 17 is driven by the brake translation servo motor 18. Both the feed translation servo motor and the brake translation servo motor 18 are connected to the PLC control cabinet 6. The bottom of the test base 1 is equipped with multiple shock-absorbing pads 19.

[0021] The positioning device 3 includes a positioning box 33. At the bottom of the positioning box 33, there is a positioning guide rail slider 31 and a positioning guide rail clamp 311 adapted to the feeding guide rail 13. The positioning guide rail clamp 311 is connected to the PLC control cabinet 6. Braking holes 32 are provided on both sides of the positioning box 33. A positioning box top plate 34 is provided on the top of the positioning box 33. A gearbox annular positioning plate 35 and a clamping screw and nut pair 36 are connected to the positioning box top plate 34. The clamping screw and nut pair 36 is connected through the gearbox pressure plate 37. A positioning cone pin 38 is provided on the gearbox annular positioning plate 35.

[0022] The braking loading device 2 includes a brake base plate 21. The bottom of the brake base plate 21 is provided with a brake guide rail 16 slider and a brake guide rail clamp 221 that are adapted to the brake guide rail 16. The top of the brake base plate 21 is provided with a brake bracket 24, a brake torque sensor 25 and a brake bearing seat 27. A magnetic powder brake 23 is installed on the brake bracket 24. A flange shaft 231 is connected in the middle of the magnetic powder brake 23. The flange shaft 231 is connected to the brake torque sensor 25. The brake torque sensor 25 is connected to the brake diaphragm coupling 26. The brake diaphragm coupling 26 is connected to the brake drive shaft 28. The brake drive shaft 28 is installed in the brake bearing seat 27. The end of the brake drive shaft 28 is connected to the spline load drive shaft 291 through the brake hydraulic expansion sleeve 29. The brake guide rail clamp 221, the magnetic powder brake 23 and the brake torque sensor 25 are all connected to the PLC control cabinet 6.

[0023] The drive bracket 5 includes a bracket base 51, an X-base plate 53, a Y-base plate 56, and a lifting support 58. The bracket base 51 is mounted on one of the brake bases 15. The bracket base 51 is provided with an X-guide rail 52 and an X-direction screw and nut pair. The bottom of the X-base plate 53 is provided with an X-slider 54 and an X-guide rail clamp 541 adapted to the X-guide rail 52. The X-base plate 53 is connected to the nut seat of the X-direction screw and nut pair, which is driven by an X-direction translation servo motor. The device includes a Y-axis guide rail 55 and a Y-axis lead screw and nut pair. A Y-axis base plate 56 has a Y-axis slider and a Y-axis guide rail clamp 57 adapted to the Y-axis guide rail 55 at its bottom. The Y-axis base plate 56 is connected to the nut seat of the Y-axis lead screw and nut pair, which is driven by a Y-axis translation servo motor. The drive device 4 includes a lifting base 49. The bottom of the lifting base 49 has a motor bracket 47, a motor torque sensor 46, and a motor bearing seat 44. A drive motor 48 is mounted on the motor bracket 47. The drive shaft of the drive motor 48 is connected to the motor torque sensor 46. The motor torque sensor 46 is connected to a motor diaphragm coupling 45. The motor diaphragm coupling 45 is connected to a motor drive shaft 43. The motor drive shaft 43 is inserted into the motor bearing seat 44. The end of the motor drive shaft 43 is connected to a motor spline sleeve 41 via a motor hydraulic tightening sleeve. A lifting seat 491 is provided on top of the lifting base 49. The lifting seat 491 has a lifting guide rail 492 and a lifting lead screw and nut pair. A lifting support 58 is installed... On the Y-base plate 56, the lifting support 58 is equipped with a lifting slide groove and a lifting guide rail clamp that are adapted to the lifting guide rail 492. The lifting support 58 is also equipped with a lifting servo motor 59, and the lifting screw nut pair is driven by the lifting servo motor 59. The X-guide rail clamp 541, X-axis translation servo motor, Y-guide rail clamp 57, Y-axis translation servo motor, lifting guide rail clamp, lifting servo motor 59, drive motor 48, and motor torque sensor 46 are all connected to the PLC control cabinet 6. In this example, the brake torque sensor 25 and the motor torque sensor 46 are both flange-type torque and speed sensors.

[0024] In use, the axle gearbox 8 is placed on the gearbox annular positioning plate 35 by a robot gripping or manual lifting. The positioning cone pin 38 is inserted into the positioning hole of the axle gearbox 8. At this time, the half-shaft splines on both sides of the lower part of the axle gearbox 8 are aligned with the brake holes 32 on both sides of the positioning box 33. The screw nut pair 36 is tightened manually with a wrench to press the gearbox pressure plate 37 onto the axle gearbox 8, positioning and fixing the axle gearbox 8. The NVH vibration collection sensor 11 is attached to the axle gearbox 8. The PLC control cabinet 6 controls the feeding translation servo motor to drive the screw of the feeding screw nut pair 14 to rotate, so that the positioning box 33 with the axle gearbox 8 fixed is translated between the two braking loading devices 2. Then, the PLC control cabinet 6 controls the positioning guide rail clamp 311 to clamp the feeding guide rail 13. The PLC control cabinet 6 controls the brake translation servo motor 18 to drive the two brake loading devices 2 to move toward the positioning device 3, so that the spline load transmission shaft 291 passes through the brake hole 32 of the positioning box 33 and is inserted into the spline of the half shaft teeth on both sides of the lower part of the axle reduction gearbox 8. The PLC control cabinet 6 controls the brake guide clamp 221 to clamp the brake guide 16. The PLC control cabinet 6 changes the loading torque by changing the magnetic current of the magnetic powder brake 23. The PLC control cabinet 6 drives the X-axis translation servo motor, Y-axis translation servo motor, and lifting servo motor 59 to precisely insert the motor spline sleeve 41 into the input spline shaft on the upper part of the axle reducer 8. Then, the PLC control cabinet 6 controls the X-axis guide rail clamp 541 to clamp the X-axis guide rail 52, the Y-axis guide rail clamp 57 to clamp the Y-axis guide rail 55, and the lifting guide rail clamp to clamp the lifting guide rail 492. The PLC control cabinet 6 controls the drive motor 48 to rotate, accelerate, decelerate, and reverse, etc., to test the break-in of the axle reducer 8. The vibration collection sensor 11 uploads the noise and vibration values ​​of the axle reducer 8 to the NVH test acquisition system 7. The NVH test acquisition system 7 classifies the axle reducer 8 by setting various levels of noise and vibration value standards.

Claims

1. An axle reduction gearbox testing apparatus, characterized by: The system includes a test base, two braking loading devices, a positioning device, a drive device, a drive bracket, a vibration collection sensor, a PLC control cabinet, and an NVH test and acquisition system. The two braking loading devices and the positioning device are slidably mounted on the test base, with the positioning device located between the two braking loading devices. The drive bracket is mounted on the test base, and the drive device is vertically and horizontally mounted on the drive bracket. Both braking loading devices and the drive device are connected to the PLC control cabinet. The positioning device is used to fix the axle reduction gearbox. The vibration collection sensor is mounted on the axle reduction gearbox and is connected to the NVH test and acquisition system.

2. The axle reduction gearbox testing device of claim 1, wherein: The test base includes a feeding base and two braking bases. The feeding base is located between the two braking bases. The feeding base is provided with a feeding guide rail and a feeding screw and nut assembly. The positioning device is slidably connected to the feeding guide rail and is connected to the nut seat of the feeding screw and nut assembly. The feeding screw and nut assembly is driven by a feeding translation servo motor. The braking base is provided with a braking guide rail and a braking screw and nut assembly. The braking loading device is slidably connected to the braking guide rail and is connected to the nut seat of the braking screw and nut assembly. The braking screw and nut assembly is driven by a braking translation servo motor. Both the feeding translation servo motor and the braking translation servo motor are connected to the PLC control cabinet.

3. The axle reduction gearbox testing device of claim 2, wherein: The positioning device includes a positioning box. At the bottom of the positioning box, there is a positioning guide rail slider and a positioning guide rail clamp that are adapted to the feeding guide rail. The positioning guide rail clamp is connected to the PLC control cabinet. Braking holes are provided on both sides of the positioning box. A positioning box top plate is provided on the top of the positioning box. A gearbox annular positioning plate and a clamping screw and nut pair are connected to the positioning box top plate. The clamping screw and nut pair is connected through the gearbox pressure plate. A positioning cone pin is provided on the gearbox annular positioning plate.

4. The axle reduction gearbox testing device of claim 3, wherein: The braking loading device includes a brake base plate. The bottom of the brake base plate is provided with a brake guide rail slider and a brake guide rail clamp that are adapted to the brake guide rail. The top of the brake base plate is provided with a brake bracket, a brake torque sensor, and a brake bearing seat. A magnetic powder brake is mounted on the brake bracket. A flange shaft is connected in the middle of the magnetic powder brake. The flange shaft is connected to the brake torque sensor. The brake torque sensor is connected to a brake diaphragm coupling. The brake diaphragm coupling is connected to a brake drive shaft. The brake drive shaft is mounted inside the brake bearing seat. The end of the brake drive shaft is connected to a splined load drive shaft via a brake hydraulic tightening sleeve. The brake guide rail clamp, the magnetic powder brake, and the brake torque sensor are all connected to the PLC control cabinet.

5. The axle reduction gearbox testing device of claim 4, wherein: The drive bracket includes a bracket base, an X-plate, a Y-plate, and a lifting support. The bracket base is mounted on one of the brake bases. The bracket base has an X-axis guide rail and an X-axis lead screw and nut assembly. The bottom of the X-plate has an X-slider and an X-axis guide rail clamp adapted to the X-axis guide rail. The X-plate is connected to the nut seat of the X-axis lead screw and nut assembly, which is driven by an X-axis translation servo motor. The X-plate has a Y-axis guide rail and a Y-axis lead screw and nut assembly. The bottom of the Y-plate has a Y-slider and a Y-axis guide rail clamp adapted to the Y-axis guide rail. The Y-plate is connected to the nut seat of the Y-axis lead screw and nut assembly, which is driven by a Y-axis translation servo motor. The drive device includes a lifting base. The bottom of the lifting base has a motor bracket, a motor torque sensor, and a motor bearing seat. A drive motor is mounted on the motor bracket. The moving shaft is connected to the motor torque sensor, which is connected to the motor diaphragm coupling. The motor diaphragm coupling is connected to the motor drive shaft, which is mounted inside the motor bearing housing. The end of the motor drive shaft is connected to the motor spline sleeve via a motor hydraulic tightening sleeve. A lifting seat is provided on the top of the lifting base, and the lifting seat is provided with a lifting guide rail and a lifting screw nut pair. The lifting support is mounted on the Y-base plate, and the lifting support is provided with a lifting slide groove and a lifting guide rail clamp that are adapted to the lifting guide rail. The lifting support is also provided with a lifting servo motor, and the lifting screw nut pair is driven by the lifting servo motor. The X-guide rail clamp, the X-axis translation servo motor, the Y-guide rail clamp, the Y-axis translation servo motor, the lifting guide rail clamp, the lifting servo motor, the drive motor, and the motor torque sensor are all connected to the PLC control cabinet.

6. The axle reduction gearbox testing device of claim 5, wherein: The bottom of the test base is equipped with multiple shock-absorbing pads.

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