Loading test device for electric drive axle reduction gear

Abstract

The loading test device of the electric drive axle reduction gear comprises a supporting seat, a package assembly covering the rear end of the electric drive axle reduction gear and sealing the differential output end of the electric drive axle reduction gear, a preloading plate detachably connected to the electric drive axle reduction gear, and a transition plate mounted on a driving device for driving the electric drive axle reduction gear, wherein the electric drive axle reduction gear, the package assembly and the preloading plate are respectively supported on the supporting seat, the input shaft of the electric drive axle reduction gear extends from the preloading plate, the package assembly is spline-fitted into the differential output end of the electric drive axle reduction gear, and the transition plate is guided and matched with the preloading plate when the driving device is connected with the input shaft of the electric drive axle reduction gear. The supporting stability of the differential in the test process is improved, the oil in the reduction gear is prevented from leaking through the differential output end in the test process, the quick connection and matching of the input shaft of the electric drive axle reduction gear and the driving device are realized, and the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a loading test device of electric drive axle speed reducer for loading test of electric drive axle speed reducer. BACKGROUND

[0002] The electric drive axle speed reducer of new energy automobile is the core component of automobile driving system, and is one of the components that most automobile enterprises pay attention to, and the performance index of electric drive axle speed reducer determines the vehicle performance of automobile to a great extent, and the electric drive axle speed reducer needs to be tested before leaving factory, and the highest speed of driving input shaft end reaches 9000prm / min in the test process, and the electric drive axle speed reducer assembly needs to be equipped with loading support device for support.

[0003] 1. It is difficult to realize the quick connection and cooperation of the input shaft of electric drive axle speed reducer and driving equipment, and the spline alignment and insertion of the input shaft of electric drive axle speed reducer and the output shaft of driving equipment takes a long time, and the assembly efficiency is low.

[0004] 2. The differential is located at the rear end of electric drive axle speed reducer, the differential needs to transmit large torque, the support of differential is unstable, and the differential is easy to shake in the test process of high input speed, and the wear of internal gear of differential is accelerated.

[0005] 3. The output end of differential is half shaft with internal spline, and oil leakage is easy to form from the half shaft position of differential in the test process, and the lubrication reliability of internal gear of speed reducer is reduced. UTILITY MODEL CONTENTS

[0006] The loading test device of electric drive axle speed reducer improves the support stability of differential located at the rear end of electric drive axle speed reducer in the test process, prevents the oil in speed reducer from leaking through the output end of differential in the test process, realizes the quick connection and cooperation of input shaft of electric drive axle speed reducer and driving equipment, ensures the accurate butt joint of driving equipment and input shaft of electric drive axle speed reducer and improves the assembly efficiency, and is high in practicability.

[0007] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0008] The loading test device of electric drive axle speed reducer comprises a support seat, a package assembly that is covered on the rear end of electric drive axle speed reducer and seals the differential output end of electric drive axle speed reducer, a pre-installation plate that is detachably connected on the electric drive axle speed reducer, a transition plate that is installed on driving equipment for driving electric drive axle speed reducer, the electric drive axle speed reducer, the package assembly and the pre-installation plate are supported on the support seat respectively, the input shaft of electric drive axle speed reducer extends from the pre-installation plate, the package assembly is spline matched and extends into the differential output end of electric drive axle speed reducer, and the transition plate is guided and matched with the pre-installation plate when the driving equipment is connected with the input shaft of electric drive axle speed reducer.

[0009] Preferably, the sealing assembly comprises a sealing cover positioned on the electric drive axle reducer by positioning pins and a spline shaft matched with the differential output spline of the electric drive axle reducer, the spline shaft extends into the differential output end of the electric drive axle reducer through the sealing cover, the sealing cover is in the shape of a cap covering the rear end of the electric drive axle reducer and is positioned on the electric drive axle reducer by the positioning pins, the sealing cover is supported on the support base.

[0010] Preferably, the pre-assembly plate is connected to the electric drive axle reducer by positioning pins, and a through hole is formed on the pre-assembly plate for the input shaft of the electric drive axle reducer to extend out.

[0011] Preferably, the transition plate is provided with positioning holes corresponding to the positioning pins on the pre-assembly plate, and the positioning pins on the pre-assembly plate are inserted into the positioning holes to form a guide fit between the pre-assembly plate and the transition plate.

[0012] Preferably, the support base comprises a horizontally arranged bottom plate and a support column arranged on the bottom plate in the vertical direction, and the electric drive axle reducer, the sealing cover and the pre-assembly plate are all supported by the support column.

[0013] The electric drive axle reducer loading test device of the utility model has the advantages that:

[0014] The electric drive axle reducer loading test device of the utility model has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view of the electric drive axle reducer loading test device.

[0016] Figure 2 It is a side view of the electric drive axle reducer loading test device.

[0017] Figure 3 It is a top view of the electric drive axle reducer loading test device.

[0018] Figure 4 The schematic view of the loading test device for the electric drive axle reduction gear assembled on the loading test device for the electric drive axle reduction gear. DETAILED DESCRIPTION

[0019] The embodiments of the utility model are explained in detail below. Figures 1-4 The embodiments of the utility model are explained in detail below.

[0020] The loading test device for the electric drive axle reduction gear, including support seat 1, the package assembly 2 of the rear end of the electric drive axle reduction gear is covered and the differential output end of the electric drive axle reduction gear is sealed, the preloading plate 3 of detachable connection on the electric drive axle reduction gear, the transition plate 4 of being installed on the drive equipment of driving the electric drive axle reduction gear, the electric drive axle reduction gear 100, the package assembly 2 and the preloading plate 3 are supported on support seat 1 respectively, the input shaft of electric drive axle reduction gear extends from the preloading plate 3, the package assembly 2 spline cooperation extends into the differential output end of electric drive axle reduction gear, and the transition plate 4 is connected with the input shaft of electric drive axle reduction gear with the drive equipment and forms the guide cooperation with the preloading plate 3.

[0021] The loading test device for the electric drive axle reduction gear described above, the electric drive axle reduction gear 100, the package assembly 2 and the preloading plate 3 are supported on support seat 1, the package assembly 2 is covered in the rear end of the electric drive axle reduction gear and the differential output end of the electric drive axle reduction gear is sealed, so that the rear end of the electric drive axle reduction gear is supported by the support seat, the support stability of the differential in the rear end of the electric drive axle reduction gear during the test process is improved, the shaking of the differential during the test process is reduced, the support reliability is improved, the oil liquid in the reduction gear is prevented from leaking through the differential output end during the test process, the lubrication reliability of the gear inside the reduction gear is improved, the transition plate 4 is connected with the input shaft of electric drive axle reduction gear with the drive equipment and forms the guide cooperation with the preloading plate 3, the spline connection of the drive equipment and the input shaft of electric drive axle reduction is guided through the guide cooperation of the preloading plate 3 and the transition plate 4, the quick connection cooperation of the input shaft of electric drive axle reduction gear and the drive equipment is realized, the accurate butt joint of the drive equipment and the input shaft of electric drive axle reduction is guaranteed and the assembly efficiency is improved, and the practicability is high.

[0022] The sealing assembly 2 comprises a sealing cover 21 positioned on the electric drive axle reducer 100 by positioning pins and a spline shaft 22 matched with the differential output end spline of the electric drive axle reducer, the spline shaft 22 extends into the differential output end of the electric drive axle reducer through the sealing cover 21, the sealing cover 21 is in the shape of a cap and covers the rear end of the electric drive axle reducer and is positioned on the electric drive axle reducer by the positioning pins, the sealing cover 21 is sealed from the spline shaft 22 by an oil seal, and the sealing cover 21 is supported on the support seat 1. The sealing cover 21 covers the rear end of the electric drive axle reducer and is positioned by the positioning pins, and the sealing cover 21 is supported by the support seat, thereby forming the support of the support seat 1 to the differential of the rear end of the electric drive axle reducer, ensuring the stability of the differential during the test, the spline shaft 22 extends into the differential output end to form the spline connection, the differential output end is an inner spline half shaft, the normal rotation of the half shaft is ensured through the spline connection with the spline shaft 22, and the oil leakage of the reducer through the differential output end is prevented through the oil seal assembled between the spline shaft 22 and the sealing cover 21, thereby improving the sealing reliability of the electric drive axle reducer during the test.

[0023] The pre-assembly plate 3 is connected to the electric drive axle reducer by positioning pins, and a through hole 31 is formed in the pre-assembly plate 3 for the output shaft of the electric drive axle reducer to extend out. The pre-assembly plate 3 is used to form a guide fit with the transition plate 4, so that the output end of the driving device is aligned with the input shaft of the electric drive axle reducer to form a precise spline connection. When connected, the driving device drives the transition plate 4 to move close to the input shaft of the electric drive axle reducer, and the transition plate 4 forms a guide fit with the pre-assembly plate 3 to guide the spline fit between the output end of the driving device and the input shaft of the electric drive axle reducer, thereby ensuring the precise butt joint of the inner and outer splines and improving the reliability and efficiency of assembly.

[0024] The transition plate 4 is mounted on the driving device and moves close to the pre-assembly plate 3 as the driving device moves close to the input shaft of the electric drive axle reducer, so that the positioning pins 32 on the pre-assembly plate 3 gradually insert into the corresponding positioning holes on the transition plate 4. When the pre-assembly plate 3 abuts against the transition plate 4, the driving device is moved into position, the output end of the driving device is connected with the input shaft of the electric drive axle reducer by spline, the transition plate 4 is positioned on the pre-assembly plate 3, and then the driving device is started to transmit power to the input shaft of the electric drive axle reducer to drive the electric drive axle reducer to operate.

[0025] The support seat 1 comprises a horizontal bottom plate 11 and a support column 12 vertically arranged on the bottom plate 11, and the electric drive axle reduction gear 100, the encapsulation cover 21 and the pre-assembly plate 3 are all supported by the support column 12. The multi-point support of the electric drive axle reduction gear is formed by the support column 12, the reliability of the support is ensured, and the stability of the electric drive axle reduction gear in the test process is improved. In the assembly, the encapsulation assembly 2 and the pre-assembly plate 3 are assembled on the electric drive axle reduction gear first, then the electric drive axle reduction gear is supported on the support column 12, then the transition plate 4 is assembled on the driving device, then the driving device is pushed to move towards the input shaft of the electric drive axle reduction gear to form the connection between the output end of the driving device and the input end of the electric drive axle reduction gear, then the driving device is started to drive the electric drive axle reduction gear to run, and the loading test of the electric drive axle reduction gear is formed.

[0026] The technical scheme of the embodiments of the utility model is completely described above in combination with the drawings, and it should be noted that the described embodiments are only a part of the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

Claims

1. A loading test device for an electric drive axle reduction gear, characterized in that: The support seat, the package assembly, the pre-assembly plate and the transition plate are supported on the support seat, the input shaft of the electric drive axle reducer extends from the pre-assembly plate, the package assembly is spline-fitted into the differential output end of the electric drive axle reducer, and the transition plate is guided and matched with the pre-assembly plate when the driving device is connected with the input shaft of the electric drive axle reducer.

2. The loading test device for an electric drive axle reduction gear according to claim 1, characterized in that The package assembly comprises a package cover positioned on the electric drive axle reducer by a positioning pin and a spline shaft spline-fitted with the differential output end of the electric drive axle reducer, the spline shaft extends into the differential output end of the electric drive axle reducer through the package cover, the package cover is in the shape of a cap and covers the rear end of the electric drive axle reducer and is positioned on the electric drive axle reducer by the positioning pin, the spline shaft and the package cover are sealed by an oil seal, and the package cover is supported on the support seat.

3. The loading test device for an electric drive axle reduction gear according to claim 2, characterized in that The pre-assembly plate is connected to the electric drive axle reducer by a positioning pin, and a through hole is formed on the pre-assembly plate for the input shaft of the electric drive axle reducer to extend out.

4. The loading test device for an electric drive axle reduction gear according to claim 2, characterized in that: A positioning hole corresponding to the positioning pin on the pre-assembly plate is formed on the transition plate, and the positioning pin on the pre-assembly plate is inserted into the positioning hole to form the guiding and matching of the pre-assembly plate and the transition plate.

5. The loading test device for an electric drive axle reduction gear according to claim 4, characterized in that The support seat comprises a horizontally arranged bottom plate and a support column arranged on the bottom plate in the vertical direction, and the electric drive axle reducer, the package cover and the pre-assembly plate are all supported by the support column.

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