A durability test system for electric drive reduction gearbox

Abstract

The utility model discloses an electric drive reduction box durability test system. The technical solution of the utility model is: including a machine platform, on which a driving motor, a test piece, a test piece, a test piece mounting bracket, a low-speed shaft system, a high-speed shaft system and a mechanical loading device are arranged. The driving motor is connected to the test piece through a driving motor coupling and a connecting short shaft, and a motor torque sensor is arranged on the connecting short shaft. The low-speed shaft system and the high-speed shaft system are arranged between the test piece and the test piece. The test piece mounting bracket is a three-axis adjustable support stand for supporting and fixing the test piece and the test piece, and the mechanical loading device is arranged on the low-speed shaft system. The solution provided by the utility model can accurately and stably perform durability tests on electric drive reduction boxes.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive reduction box testing, in particular to an electric drive reduction box durability testing system. Background Art

[0002] The electric drive reduction box is a core component of the transmission system of new energy vehicles. Its durability performance is very important to the quality and safety of the vehicle. The durability test scheme for the electric drive reduction box or gearbox in the existing technology has the problems of incomplete testing and low accuracy. Utility Model Content

[0003] In view of the deficiencies in the prior art, the main purpose of the utility model is to provide an electric drive reduction gearbox durability testing system that can accurately and stably perform durability tests on the electric drive reduction gearbox.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric drive reduction box durability testing system, including a machine platform, on which a drive motor, a test piece, a test piece, a test piece mounting bracket, a low-speed shaft system, a high-speed shaft system and a mechanical loading device are arranged, the drive motor is connected to the test piece through a drive motor coupling and a connecting short shaft, a motor torque sensor is arranged on the connecting short shaft, the low-speed shaft system and the high-speed shaft system are arranged between the test piece and the test piece, the test piece mounting bracket is a three-axis adjustable support stand for supporting and fixing the test piece and the test piece, and the mechanical loading device is arranged on the low-speed shaft system.

[0005] Preferably, the low-speed shaft system includes a test piece low-speed connecting shaft connected to the test piece and a test piece low-speed connecting shaft connected to the test piece. The test piece low-speed connecting shaft and the test piece low-speed connecting shaft are connected via a low-speed coupling, and a low-speed torque sensor is provided on the test piece low-speed connecting shaft.

[0006] Preferably, the mechanical loading device comprises a lever arm sleeved and fixed on the low-speed coupling, and the lever arm is vertically connected to a hanging plate on which a plurality of weights can be placed.

[0007] Preferably, the high-speed shaft system includes a test piece high-speed connecting shaft connected to the test piece and a test piece high-speed connecting shaft connected to the test piece. The test piece high-speed connecting shaft is connected to a test piece high-speed coupling, and the test piece high-speed connecting shaft is connected to a test piece high-speed coupling. The test piece high-speed coupling and the test piece high-speed coupling are jointly connected to a high-speed torque sensor.

[0008] Preferably, the machine platform is provided with a protective cover capable of covering the low-speed shaft system and the high-speed shaft system.

[0009] The utility model has the following advantages over the prior art: the scheme is a mechanical closed power flow test system for endurance test of electric drive reduction box performance, loading torque on the electric drive reduction box, and simulating the actual load of the electric drive reduction box. By designing the low-speed shaft system and the high-speed shaft system, the low-speed and high-speed performance of the test piece can be tested respectively, and the three-axis adjustable support stand can accurately install and fix the test piece and the test piece, thereby ensuring the test accuracy. The whole system applies mechanical torque through the drive motor. When the low-speed performance needs to be tested, the drive motor is the low-speed end drive motor, which drives the low-speed shaft system to operate. When the high-speed performance needs to be tested, the drive motor is the high-speed end drive motor, which drives the high-speed shaft system to operate. Independent testing ensures the accuracy of the test. The mechanical loading device is arranged on the low-inertia, high-torque low-speed shaft system, which is used to maintain torque when the shaft of the low-speed shaft system is fixed, thereby ensuring the connection effect. The motor torque sensor is used to measure how much torque the drive motor supplies to the mechanical closed system to determine the loss of sample gear friction. This test system can collect electric drive reducer life data and electric drive reducer loss data, and can derive the gear SN curve and Weibull curve to establish a gear fatigue failure model. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of an electric drive reduction gearbox durability test system of the utility model. Figure 1 ;

[0011] Figure 2 This is a schematic diagram of the structure of an electric drive reduction gearbox durability test system of the utility model. Figure 2 ;

[0012] Figure 3 The utility model is a schematic diagram of the structure of a test piece mounting bracket of an electric drive reduction gearbox durability test system.

[0013] In the figure: 1. machine table; 2. driving motor; 3. test piece; 4. test piece; 5. test piece mounting bracket; 6. low-speed shaft system; 7. high-speed shaft system; 8. mechanical loading device; 9. driving motor coupling; 10. connecting short shaft; 11. low-speed connecting shaft of test piece; 12. low-speed connecting shaft of test piece; 13. low-speed torque sensor; 14. lever arm; 15. hanging plate; 16. weight; 17. high-speed connecting shaft of test piece; 19. high-speed connecting shaft of test piece; 20. high-speed coupling of test piece; 21. high-speed coupling of test piece; 22. high-speed torque sensor; 23. motor torque sensor; 24. base. DETAILED DESCRIPTION

[0014] The utility model will be further described below in conjunction with the accompanying drawings.

[0015] like Figure 1As shown, an electric drive reduction box durability test system includes a machine platform 1, on which a drive motor 2, a test piece 3, a test piece 4, a test piece mounting bracket 5, a low-speed shaft system 6, a high-speed shaft system 7 and a mechanical loading device 8 are arranged. The drive motor 2 is connected to the test piece 3 through a drive motor coupling 9 and a connecting short shaft 10, and a motor torque sensor 23 is arranged on the connecting short shaft 10. The low-speed shaft system 6 and the high-speed shaft system 7 are arranged between the test piece 3 and the test piece 4. The test piece mounting bracket 5 is a three-axis adjustable support stand for supporting and fixing the test piece 3 and the test piece 4, and the mechanical loading device 8 is arranged on the low-speed shaft system 6.

[0016] This scheme is a mechanical closed power flow test system used for endurance test of electric drive reduction box performance, loading torque on electric drive reduction box, simulating the actual load of electric drive reduction box. By designing low-speed shaft system 6 and high-speed shaft system 7, the low-speed and high-speed performance of test piece 4 can be tested respectively. The three-axis adjustable support stand can accurately install and fix the test piece 3 and test piece 4, ensuring the test accuracy. The whole system applies mechanical torque through the drive motor 2. When the low-speed performance needs to be tested, the drive motor 2 is the low-speed end drive motor 2, driving the low-speed shaft system 6 to operate. When the high-speed performance needs to be tested, the drive motor 2 is the high-speed end drive motor 2, driving the high-speed shaft system 7 to operate. Independent testing ensures the accuracy of the test. The mechanical loading device 8 is set on the low-inertia, high-torque low-speed shaft system 6, which is used to maintain torque when the shaft of the low-speed shaft system 6 is fixed to ensure the connection effect. The motor torque sensor 23 is used to measure how much torque the drive motor 2 supplies to the mechanical closed system to determine the loss of sample gear friction. Through this test system, the life data and loss data of the electric drive reducer can be collected, and the gear SN curve and Weibull curve can be derived to establish a gear fatigue failure model.

[0017] The structure of the three-axis adjustable support stand includes a base 24 and adjustment mechanisms in three directions of the XYZ axes, which can accurately adjust and fix the accompanying test piece 3 and the test piece 4.

[0018] Preferably, the low-speed shaft system 6 includes a test piece low-speed connecting shaft 11 connected to the test piece 3 and a test piece low-speed connecting shaft 12 connected to the test piece 4. The test piece low-speed connecting shaft 11 and the test piece low-speed connecting shaft 12 are connected via a low-speed coupling, and a low-speed torque sensor 13 is provided on the test piece low-speed connecting shaft 12.

[0019] For the low-speed shaft system 6 with large inertia and large torque, the adapter plates of the test piece 3 and the test piece 4 are connected through the test piece low-speed connecting shaft 11 and the test piece low-speed connecting shaft 12. The low-speed shaft system includes a low-speed coupling and a low-speed torque sensor 13, wherein the low-speed torque sensor 13 is used to measure the torque applied by the mechanical loading device 8 to the low-speed shaft system 6. In addition, different lengths of the test piece low-speed connecting shaft 12 and the test piece low-speed connecting shaft 11 can be used according to different wheelbases.

[0020] Preferably, the mechanical loading device 8 comprises a lever arm 14 sleeved and fixed on the low-speed coupling, and the lever arm 14 is vertically connected to a hanging plate 15 on which a plurality of weights 16 can be placed.

[0021] The mechanical loading device 8 can adjust the torque applied to the low-speed shaft system 6 according to different settings of the weights 16 .

[0022] Preferably, the high-speed shaft system 7 includes a test piece high-speed connecting shaft 17 connected to the test piece 3 and a test piece high-speed connecting shaft 19 connected to the test piece 4. The test piece high-speed connecting shaft 17 is connected to a test piece high-speed coupling 20, and the test piece high-speed connecting shaft 19 is connected to a test piece high-speed coupling 21. The test piece high-speed coupling 20 and the test piece high-speed coupling 21 are jointly connected to a high-speed torque sensor 22.

[0023] For the high-speed shaft system 7 with low inertia and small torque, the adapter plates of the test piece 3 and the test piece 4 are connected through the test piece high-speed connecting shaft 17 and the test piece high-speed connecting shaft 19. The high-speed shaft system includes two high-speed couplings and a high-speed torque sensor 22 connecting the two high-speed couplings. The high-speed torque sensor 22 can. In addition, different lengths of the test piece high-speed connecting shaft 19 and the test piece high-speed connecting shaft 17 can be used according to different wheelbases.

[0024] Preferably, a motor torque sensor 23 is provided on the connecting stub shaft 10. The motor torque sensor 23 is used to measure how much torque the driving motor 2 supplies to the mechanical closed system to determine the loss of friction of the sample gear.

[0025] Preferably, the machine 1 is provided with a protective cover capable of covering the low-speed shaft system 6 and the high-speed shaft system 7. The protective cover can seal the low-speed shaft system 6 and the high-speed shaft system 7, thereby protecting the equipment and the operator.

[0026] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An electric drive reduction gearbox durability test system, characterized by: The machine comprises a platform, on which a driving motor, a test piece, a test piece, a test piece mounting bracket, a low-speed shaft system, a high-speed shaft system and a mechanical loading device are arranged. The driving motor is connected to the test piece through a driving motor coupling and a connecting short shaft, a motor torque sensor is arranged on the connecting short shaft, the low-speed shaft system and the high-speed shaft system are arranged between the test piece and the test piece, the test piece mounting bracket is a three-axis adjustable support stand for supporting and fixing the test piece and the test piece, and the mechanical loading device is arranged on the low-speed shaft system.

2. The electric drive reduction gearbox durability test system according to claim 1, characterized in that: The low-speed shaft system includes a test piece low-speed connecting shaft connected to the test piece and a test piece low-speed connecting shaft connected to the test piece. The test piece low-speed connecting shaft and the test piece low-speed connecting shaft are connected via a low-speed coupling. A low-speed torque sensor is provided on the test piece low-speed connecting shaft.

3. The electric drive reduction gearbox durability testing system according to claim 2, characterized in that: The mechanical loading device comprises a force arm which is sleeved and fixed on the low-speed coupling, and the force arm is vertically connected with a hanging plate on which a plurality of weights can be placed.

4. The electric drive reduction gearbox durability testing system according to claim 1, characterized in that: The high-speed shaft system includes a test piece high-speed connecting shaft connected to the test piece and a test piece high-speed connecting shaft connected to the test piece. The test piece high-speed connecting shaft is connected to a test piece high-speed coupling, and the test piece high-speed connecting shaft is connected to a test piece high-speed coupling. The test piece high-speed coupling and the test piece high-speed coupling are jointly connected to a high-speed torque sensor.

5. The electric drive reduction gearbox durability testing system according to claim 1, characterized in that: The machine platform is provided with a protective cover capable of covering the low-speed shaft system and the high-speed shaft system.

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