Flexible electric drive bridge assembly testing equipment

Abstract

This utility model discloses a testing equipment for a flexible electric drive axle assembly, comprising a base, a movable loading and positioning slide assembly, and a support device. The movable loading and positioning slide assembly includes a loading slide base, a first guide rail, a first ball screw, a first reducer, a first servo motor, a first guide rail caliper, a square box, a magnetic powder brake, a connecting shaft, and a hub connecting plate. The loading slide base is fixed on the base, and two first guide rails are provided on the loading slide base. A first ball screw driven by the first servo motor via the first reducer is arranged between the two first guide rails. The square box moves along the first guide rails via the first ball screw. A first guide rail caliper is installed at the bottom of the square box, and the magnetic powder brake is installed on the square box. The rotation shaft of the magnetic powder brake is connected to the hub connecting plate via the connecting shaft. This utility model solves the problems of high cost, low efficiency, and difficulty in quickly switching between different electric drive axle assembly structures in existing flexible electric drive axle assembly testing equipment.

Description

Technical Field

[0001] This utility model relates to the field of electric drive bridge assembly performance testing technology, and in particular to a testing equipment for a flexible electric drive bridge assembly. Background Technology

[0002] With the continuous expansion of the new energy vehicle market, electric drive axle assemblies are gradually replacing traditional axle assemblies as the mainstream component requirement. The performance of flexible electric drive axle assemblies directly affects the vehicle's power, economy, and ride comfort. Therefore, electric drive axle assemblies must undergo trial runs before leaving the factory. The main purpose of these trials is to check whether key performance indicators such as noise and abnormal sounds generated by the new energy drive axle assembly during operation meet factory standards, thereby ensuring the stable operation and ride comfort of the vehicle under complex working conditions.

[0003] However, existing testing equipment generally uses cylinders with limit blocks for component positioning and fixing, and then manually tightens them with T-nuts. This positioning and fixing mechanism is not only cumbersome and inefficient, making it difficult to quickly switch between different electric drive axle assembly structures, but it also heavily relies on manual operation, making it difficult to improve the level of automation and failing to meet the urgent needs of modern production lines for high efficiency and precision.

[0004] In addition, existing testing equipment mostly uses motor drive for loading. Although it can achieve a certain loading effect, the cost of motors is high, and the complexity and maintenance cost of its control system also increase accordingly. Utility Model Content

[0005] The purpose of this invention is to provide a testing equipment for flexible electric drive axle assemblies. This equipment can solve the problems of high cost, low efficiency, and difficulty in quickly switching between different electric drive axle assembly structures in existing flexible electric drive axle assembly testing equipment.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: This flexible electric drive bridge assembly test equipment includes a base and a positioning device and a support device installed on the base for fixing the electric drive bridge assembly. The positioning device consists of two opposing movable loading positioning slide assemblies. Each movable loading positioning slide assembly includes a loading slide base, a first guide rail, a first ball screw, a first reducer, a first servo motor, a first guide rail caliper, a square box, a magnetic powder brake, a connecting shaft, and a hub connecting plate. The loading slide base is fixed on the base. Two first guide rails are arranged parallel to each other on the loading slide base. A first ball screw driven by the first servo motor and the first reducer is arranged between the two first guide rails. The square box moves along the first guide rails via the first ball screw. The first guide rail caliper is installed at the bottom of the square box. The magnetic powder brake is installed on the square box. The rotation shaft of the magnetic powder brake is connected to the hub connecting plate via the connecting shaft.

[0007] In the above-mentioned technical solution for the flexible electric drive bridge assembly test equipment, a more specific technical solution may be: an encoder mounting plate is fixed on the outer end face of the magnetic powder brake, an encoder connecting shaft coaxially arranged with the rotating shaft is mounted on the encoder mounting plate, and the encoder is mounted on the encoder connecting shaft.

[0008] In some other possible implementations, the support device is a movable clamping support assembly, which includes a support base plate, a second guide rail, and two clamping support units. The support base plate is located between the two movable loading and positioning slide assemblies and fixed to the base. Two second guide rails are arranged parallel to each other on the support base plate. Each clamping support unit includes a second ball screw, a second reducer, a second servo motor, a second guide rail caliper, a support slide plate, a support base, a clamping column, a pressure plate, and a locking nut. A second ball screw driven by the second servo motor and the second reducer is arranged between the two second guide rails. The support slide plate moves along the second guide rail via the second ball screw. The second guide rail caliper is installed at the bottom of the support slide plate. The support base is fixed to the support slide plate. The pressure plate is connected to the support base via the clamping column. The locking nut locks the pressure plate.

[0009] In some other possible implementations, the support base is provided with a limiting support seat, and the bottom of the pressing column is provided with a limiting plate that cooperates with the limiting support seat.

[0010] In some other possible implementations, the clamping column is threadedly connected to the limiting plate.

[0011] In some other possible implementations, the limiting support has a plate base positioning plate fixed at its upper end, and a positioning pin is inserted in the middle of the plate base positioning plate.

[0012] In some other possible implementations, the base is a cast iron base with multiple shock-absorbing pads arranged on its bottom.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: 1. Two opposing moving loading and positioning slide assemblies are set up. The square box is moved by ball screws, which can quickly adjust the position to adapt to flexible electric drive bridge assemblies with different structures, realizing rapid changeover in multi-variety, small-batch production and greatly improving production efficiency. Servo motors are used with ball screws for precise positioning, and guide rail calipers are used for locking and fixing, making operation more convenient, significantly improving the degree of automation, and effectively reducing the labor intensity of workers. Magnetic powder brakes are used for loading, which is simple to control, not only reducing equipment costs, but also reducing the complexity and maintenance costs of the control system.

[0014] 2. An encoder is installed on the outer end face of the magnetic powder brake to monitor the actual output speed of the wheel side in real time. This can simulate the test requirements of different speed conditions, further improving the accuracy and reliability of the test and helping to more comprehensively test the performance of the electric drive axle assembly.

[0015] 3. The structural design of the movable clamping support assembly allows for precise adjustment of the support position, meeting the support requirements of flexible electric drive bridge assemblies of different sizes and structures, and making operation flexible and convenient; the clamping structure provides stable and reliable support for the electric drive bridge assembly, ensuring that the electric drive bridge assembly will not shake or shift during the test run.

[0016] 4. An adjustable limit clamping structure is set on the support base, which can precisely control the movement range of the clamping column, making it more suitable for clamping electric drive bridge assemblies of different specifications. It can also ensure that the clamping force on the electric drive bridge assembly is uniform and stable, thus improving the safety and accuracy of the test run.

[0017] 5. The threaded connection between the clamping column and the limit plate facilitates disassembly and installation, improves the maintainability and flexibility of the equipment, reduces downtime for maintenance, and further improves production efficiency.

[0018] 6. Set up a plate base positioning plate and positioning pins to accurately align with the positioning pin holes of the electric drive bridge assembly leaf springs and accurately complete the positioning and placement.

[0019] The base is made of cast iron, which has high strength and stability, providing a solid foundation for the entire test equipment and reducing vibration during operation. Multiple shock-absorbing pads are arranged at the bottom of the cast iron base, which can further absorb and isolate the vibration generated during equipment operation, reduce noise, create a more stable and quiet environment for the test, and also help improve the accuracy and reliability of the test. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the test equipment for the flexible electric drive bridge assembly.

[0021] Figure 2 yes Figure 1 Top view.

[0022] Figure 3 This is an isometric view of the moving loading and positioning slide assembly.

[0023] Figure 4 This is the main view of the moving loading and positioning slide assembly.

[0024] Figure 5 This is an isometric view of the movable clamping support assembly.

[0025] Figure 6 This is the main view of the movable clamping support assembly.

[0026] Figure 7 This is the main view of the base assembly.

[0027] Figure 8 yes Figure 7 Top view.

[0028] Explanation of icon numbers: Figure 1 1. Base; 2. Moving loading and positioning slide assembly; 3. Moving clamping support assembly; 4. Electric drive bridge assembly; Figure 2 51. Control box; Figure 3 4. Loading slide base; 5. Square box; 6. Front bearing cover; 7. Rotating shaft; 10. Hub connecting plate; 11. First guide rail; 12. First ball screw; 15. First screw support seat; 16. First reducer seat; 17. First reducer; 18. First servo motor; 19. Square box cover plate; 21. Connecting shaft; 22. Magnetic powder brake; 23. Coupling; 24. Rotating shaft transition plate; 25. First guide rail caliper; Figure 4 8. Bearing; 9. Rear bearing cover; 13. First lead screw fixing seat; 14. First lead screw nut; 20. Nut; 26. Encoder; 27. Encoder connecting shaft; 28. Encoder mounting plate; Figure 529. Support base plate; 30. Support slide plate; 31. Support base; 32. Limiting support seat; 33. Second ball screw; 34. Second screw fixing seat; 35. Second screw support seat; 37. Second reducer seat; 38. Coupling; 39. Second guide rail; 40. Second servo motor; 41. Second reducer; 42. Plate seat positioning plate; 43. Positioning pin; 44. Pressing column; 45. Pressure plate; 46. Upper end plate of limiting support seat; 47. Limiting plate; 48. Second guide rail clamp; 49. Locking nut; Figure 6 36. Second lead screw nut; Figure 7 1. Base; 50. Shock-absorbing feet. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1 and Figure 2 The flexible electric drive axle assembly test equipment shown mainly includes a base 1, a positioning device, a support device, and a control box 51. The positioning device consists of two opposing movable loading positioning slide assemblies 2, and the support device consists of a movable clamping support assembly 3. The movable loading positioning slide assemblies 2 and the movable clamping support assembly 3 are mounted on the centerline of the base 1. The two opposing movable loading positioning slide assemblies 2 are precisely positioned by servo drive and are used to connect the electric drive axle hub and apply load. The movable clamping support assembly 3, located between the two movable loading positioning slide assemblies 2, can adaptively adjust the center distance of the leaf springs to complete the clamping and fixing of the axle assembly.

[0030] like Figure 3 and Figure 4As shown, the movable loading and positioning slide assembly 2 mainly includes a loading slide base 4, a first guide rail 11, a first ball screw 12, a first reducer 17, a first servo motor 18, a first guide rail caliper 25, a square box 5, a magnetic powder brake 22, a connecting shaft 21, and a hub connecting plate 10. The movable loading and positioning slide assembly 2 includes a loading slide base 4, a first guide rail 11, a first ball screw 12, a first reducer 17, a first servo motor 18, a first guide rail caliper 25, a square box 5, a magnetic powder brake 22, a connecting shaft 21, a hub connecting plate 10, a front bearing cover 6, a first screw support 15, a first reducer base 16, a square box cover 19, a coupling 23, and a rotating shaft transition plate 24. The loading slide base 4 is fixed on the base 1, and two first guide rails 11 are arranged parallel to each other on it. A first ball screw 12, driven by a first servo motor 18 via a first reducer 17, is positioned between the two first guide rails 11. A first screw support 15 supports the first ball screw 12. A first screw fixing seat 13 and a first screw support seat support both ends of the first ball screw 12 to ensure stable operation. The first reducer 17 is mounted on a first reducer seat 16 to provide stable power transmission to the first ball screw 12. A first screw nut 14 is mounted on the first ball screw 12. A square box 5 is connected to the first screw nut 14. The rotation of the first ball screw 12 drives the first screw nut 14 and the square box 5 to move along the first guide rails 11. After moving into position, a nut 20 is used to lock the first screw nut 14 to prevent loosening. The square box 5 moves along the first guide rail 11 via the first ball screw 12. A square box cover 19 is provided at the top of the square box 5 to protect internal components and prevent dust. A first guide rail clamp 25 is installed at the bottom of the square box 5 to lock and fix its position. A magnetic powder brake 22 is installed on the square box 5. A front bearing cap 6 is installed at the end of the magnetic powder brake 22 near the rotating shaft 7 to protect and position the bearing. A rear bearing cap 9 is installed at the end of the magnetic powder brake 22 away from the front bearing cap 6 to further protect the bearing. Its rotating shaft 7 is connected to the rotating shaft transition plate 24 via a coupling 23, and the rotating shaft transition plate 24 is then connected to the hub connecting plate 10 via a connecting shaft 21. In addition, an encoder mounting plate 28 is fixed to the outer end face of the magnetic powder brake 22. The encoder mounting plate 28 is equipped with an encoder connecting shaft 27 that is coaxial with the rotating shaft 7. The encoder 26 is mounted on the encoder connecting shaft 27 and is used to monitor the actual rotation speed of the wheel side output in real time.

[0031] like Figure 5 and Figure 6As shown, the movable clamping support assembly 3 includes a support base plate 29, second guide rails 39, and two clamping support units. The support base plate 29 is located between the two movable loading positioning slide assemblies 2 and fixed to the base 1. Two second guide rails 39 are arranged parallel to each other on the support base plate 29. Each clamping support unit includes a second ball screw 33, a second reducer 41, a second servo motor 40, a second guide rail clamp 48, a support slide plate 30, a support base 31, a clamping column 44, a pressure plate 45, and a locking nut 49. The second screw fixing seat 34 and the second screw support seat 35 support the two ends of the second ball screw 33 respectively to ensure its stable operation. The second reducer 41 is mounted on the second reducer seat 37, and the second screw nut 36 is mounted on the ball screw 33. The support slide plate 30 is connected to the second screw nut 36. A second ball screw 33, driven by a second servo motor 40 and a second reducer 41, is installed between two second guide rails 39. The support slide plate 30 moves along the second guide rails 39 via the second ball screw 33. A second guide rail clamp 48 is installed at the bottom of the support slide plate 30 to lock and fix its position. The support base 31 is fixed on the support slide plate 30. The pressure plate 45 is connected to the support base 31 via a pressure column 44. A locking nut 49 is used to lock the pressure plate 45. A limit support seat 32 is provided on the support base 31. The bottom of the pressure column 44 is provided with a limit plate 47 that cooperates with the limit support seat 32. The upper end plate 46 of the limit support seat has a U-shaped groove that passes through the pressure column 44. The pressure column 44 is threadedly connected to the limit plate 47, which is convenient for disassembly and installation. When it is necessary to adjust the clamping force or replace the clamping parts, the operation can be carried out quickly and conveniently. Preferably, the support base 31 is provided with a plate positioning plate 42 and a positioning pin 43, which are used to accurately align with the positioning pin hole of the electric drive bridge assembly leaf spring to accurately complete the positioning and placement.

[0032] like Figure 7 and Figure 8 As shown, base 1 is made of cast iron, which ensures the high strength and stability of the base. Multiple shock-absorbing pads 50 are arranged at the bottom of the cast iron base, which can effectively absorb and isolate vibrations generated during equipment operation, reduce noise, and create a stable and quiet environment for testing.

[0033] Before testing, confirm that the moving loading and positioning slide assembly 2 is in the standby position. Set the corresponding positioning parameters on the electrical control panel of the control box 51. The second servo motor 40 on the moving clamping support assembly 3 completes the positioning of the leaf spring center distance L according to the instruction requirements. Different leaf spring center distances L can be quickly switched. After positioning, the second guide rail clamp 48 on the moving clamping support assembly 3 locks the second guide rail 39 to fix the position of the support slide plate 30. Then, hoist the electric drive bridge assembly 52 onto the plate base positioning plate 42 of the moving clamping support assembly 3, aligning the leaf spring positioning pin hole of the electric drive bridge assembly 52 with the positioning pin 43 to complete the positioning. Then, use the pressure plate 45 and the locking nut 49 to lock and fix the electric drive bridge assembly 52. After the electric drive axle assembly 52 is positioned and fixed, the moving loading positioning slide assembly 2, according to the design parameters, uses the first servo motor 18 to drive the first ball screw 12 to move the square box 5 forward. The positioning hole of the front hub connecting plate 10 of the square box 5 is rotated to align with the wheel hub tire bolts on the electric drive axle assembly 52 until the end face of the hub connecting plate 10 contacts the end face of the wheel rim. The connection and positioning of the moving loading positioning slide assembly 2 and the electric drive axle assembly 52 are then completed using connectors. After positioning, the first guide rail caliper 25 locks the first guide rail 11, fixing the position of the square box 5. After the moving loading positioning slide assembly 2 is positioned and fixed, the motor controller of the electric drive axle assembly 52 is started to operate the axle assembly transmission system. The magnetic powder brake 22 applies a torque load of 0~1000 N.M as required to simulate actual working conditions for testing. The encoder 26 monitors the actual rotational speed output at the wheel edge in real time to meet the requirements of simulating different rotational speed conditions for testing. Meanwhile, the electrical control system inside control box 51 monitors and records the noise and abnormal sounds during the trial run of the electric drive bridge assembly 52. ​​If any abnormality is detected, defective products can be intercepted in a timely manner, and rework, repair, and retesting can be arranged to prevent defective products from being released. The electrical control system in this embodiment uses an existing noise and abnormal sound monitoring system, which will not be described in detail here.

[0034] This electric drive axle assembly is designed for equipment capable of adapting to rapid changeover in small batches of various products. Through the coordination of servo motors and ball screws, the equipment can be quickly adjusted to accommodate different leaf spring center distances, meeting the needs of rapid mold changeovers and trial runs for different types of axle assemblies, thus improving production efficiency. Using a magnetic powder brake for loading simplifies control and reduces equipment costs compared to traditional motor-driven loading methods, while also reducing the complexity and maintenance costs of the control system.

Claims

1. A flexible electric drive axle assembly test equipment, comprising a base and a positioning device and a supporting device mounted on the base for fixing an electric drive axle assembly, characterized in that: The positioning device consists of two opposing movable loading and positioning slide assemblies. Each movable loading and positioning slide assembly includes a loading slide base, a first guide rail, a first ball screw, a first reducer, a first servo motor, a first guide rail caliper, a square box, a magnetic powder brake, a connecting shaft, and a hub connecting plate. The loading slide base is fixed to the base. Two first guide rails are arranged parallel to each other on the loading slide base. A first ball screw driven by the first servo motor and the first reducer is arranged between the two first guide rails. The square box moves along the first guide rails via the first ball screw. The first guide rail caliper is installed at the bottom of the square box. The magnetic powder brake is installed on the square box. The rotation shaft of the magnetic powder brake is connected to the hub connecting plate via the connecting shaft.

2. The flexible electric drive axle assembly proving ground equipment of claim 1, wherein: An encoder mounting plate is fixed to the outer end face of the magnetic powder brake. An encoder connecting shaft coaxially arranged with the rotating shaft is mounted on the encoder mounting plate, and the encoder is mounted on the encoder connecting shaft.

3. The flexible electric drive axle assembly commissioning apparatus of claim 1 or 2, wherein: The supporting device is a movable clamping support assembly, which includes a support base plate, a second guide rail, and two clamping support units. The support base plate is located between the two movable loading and positioning slide assemblies and fixed to the base. Two second guide rails are arranged parallel to each other on the support base plate. Each clamping support unit includes a second ball screw, a second reducer, a second servo motor, a second guide rail caliper, a support slide plate, a support base, a clamping column, a pressure plate, and a locking nut. A second ball screw driven by the second servo motor and the second reducer is arranged between the two second guide rails. The support slide plate moves along the second guide rail via the second ball screw. The second guide rail caliper is installed at the bottom of the support slide plate. The support base is fixed to the support slide plate. The pressure plate is connected to the support base via the clamping column. The locking nut locks the pressure plate.

4. The flexible electric drive axle assembly proving ground equipment of claim 3, wherein: The support base is provided with a limiting support seat, and the bottom of the pressing column is provided with a limiting plate that cooperates with the limiting support seat.

5. The flexible electric drive axle assembly proving ground equipment of claim 4, wherein: The clamping column is threadedly connected to the limiting plate.

6. The flexible electric drive axle assembly proving equipment of claim 4, wherein: The upper end of the limiting support is fixed with a plate base positioning plate, and a positioning pin is inserted into the middle of the plate base positioning plate.

7. The flexible electric drive axle assembly proving ground equipment of claim 1, wherein: The base is a cast iron base, and the bottom of the cast iron base is provided with multiple shock-absorbing pads.

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