CN111638454A - Electric drive assembly offline test bench compatible with speed reducer test and test method thereof - Google Patents

Abstract

The invention relates to the field of electric drive assembly testing, and discloses an electric drive assembly offline test bench compatible with reducer testing, comprising a bench base, a test position on the bench base, and an assembly under the test position There are also two load dynamometers on the tray, the base of the bench, the bench support plate for fixing the electric drive assembly on one side of the test position, and the accompanying test power motor installed on the reducer, the accompanying test power The motor and the reducer are combined into an assembly to be tested. The assembly to be tested can be fixed on the support plate of the bench. When the assembly to be tested is tested, the two load dynamometers pass through the guide rail to quickly connect with the to-be-tested device on the test position. Assembly docking. The invention also discloses a test method of the electric drive assembly off-line test bench compatible with the reducer test. The electric drive assembly off-line test bench and the test method thereof compatible with the reducer test of the present invention have strong compatibility, can be used for the off-line test of the reducer, and greatly reduce the production cost.

Description

Electric drive assembly end-of-line test bench compatible with reducer test and its test method

technical field

The invention relates to the field of electric drive assembly testing, in particular to an electric drive assembly offline test bench compatible with reducer testing and a testing method thereof.

Background technique

At present, in the field of three-in-one pure electric drive assembly production, domestic new energy vehicle companies generally adopt the method of separating the off-line test of the motor and the reducer, that is, the off-line test of the motor assembly line adopts the towing bench to test the electrical parameters and mechanical parameters of the motor. Performance, the reducer assembly line is off-line using a three-dynamometer bench to test the reduction ratio and NVH performance. However, due to the inconsistent testing methods of the two products, such a production method also has obvious problems:

1. The initial investment is large. The drive motor needs the motor to drag the bench, the reducer needs to build a triple dynamometer bench, and after the three-in-one electric drive assembly is assembled, a second dynamometer bench is required. The test content of these benches Single, poor compatibility, greatly increasing the production cost;

2. The electric drive assembly test includes the motor test, which is significantly longer than the reducer test cycle, which causes the test rhythm of the electric drive assembly test bench to not match the test of a single reducer and a single motor, resulting in Serious waste of capacity.

SUMMARY OF THE INVENTION

The purpose of the present invention is to aim at the deficiencies of the above-mentioned technologies, and to provide an electric drive assembly off-line test bench and a test method thereof that is compatible with the reducer test. Reduced production costs.

In order to achieve the above purpose, the electric drive assembly offline test bench compatible with the reducer test designed by the present invention includes a bench base, and a test position for placing the electric drive assembly is arranged on the bench base. An assembly tray is arranged below the test position, and the bench base is also provided with a left load dynamometer and a right load dynamometer respectively located on both sides of the test position. The left load dynamometer and the right load dynamometer are The machines are all butted with the electric drive assembly on the test position through the guide rail quick docking device. One side of the test position is provided with a bench support plate for fixing the electric drive assembly, and also includes a reducer installed on the reducer. Accompanying test power motor, the accompanying test power motor and the reducer are combined into a to-be-tested assembly, and the to-be-tested assembly can be fixed on the bench support plate. When the to-be-tested assembly is detected, the Both the left load dynamometer and the right load dynamometer are docked with the assembly to be tested on the test position through the guide rail quick docking device.

Preferably, the assembly tray is provided with a plurality of support and positioning pins whose height and position can be adjusted.

Preferably, two sides of the test position are provided with first horizontal guide rails perpendicular to the base of the bench, the assembly tray is located on the first horizontal guide rail, and the assembly tray is a three-layer mechanism, so From bottom to top, the assembled tray includes a first layer of trays, a second layer of trays arranged on the first layer of trays, and a third layer of trays arranged on the second layer of trays, the first layer of trays is located at On the first horizontal guide rail, the bottom of the first layer tray is provided with a first pushing device that pushes the first layer tray to move on the first horizontal guide rail, the first layer tray and the second layer tray There is a second horizontal guide rail perpendicular to the first horizontal guide rail, and the bottom of the second layer tray is provided with a second pushing device that pushes the second layer tray to move on the second horizontal guide rail, so The third layer tray is provided with a third pushing device for lifting the third layer tray from the second layer tray.

Preferably, a side of the bench support plate close to the test position is provided with an adapter plate that cooperates with the electric drive assembly and the assembly to be tested, and the bench support plate is also provided with the test an air gap detection sensor for the gap between the adapter plate and the electric drive assembly or the assembly to be inspected, and at least three clamps are arranged on the stand support plate to clamp the electric drive assembly or the assembly to be inspected clamping tooling.

Preferably, the side of the bench support plate close to the test position is further provided with an automatic refueling tool that cooperates with the oil filling and draining nozzles on the electric drive assembly and the assembly to be tested.

Preferably, torque sensors are provided on the output shafts of the left load dynamometer and the right load dynamometer.

Preferably, a diaphragm coupling is provided on the guide rail quick docking device to improve stability.

Preferably, an NVH test tool is installed on the bench base through a bracket, and the NVH test tool is located above the test position.

A test method for an off-line test bench of an electric drive assembly compatible with reducer testing, comprising the following steps:

A) Transfer to the assembly tray: When testing the electric drive assembly, directly transfer the electric drive assembly to the assembly tray. When testing the reducer, install the accompanying power motor on the reducer to form the assembly to be tested , transfer the assembly to be inspected to the assembly tray, and manually connect the strong electricity and water routes with quick butt joints;

B) Fixing: fix the electric drive assembly or the assembly to be inspected by the stand support plate, and then lower the assembly tray to make the electric drive assembly or assembly to be inspected and the assembly The tray is disengaged;

C) Load half-shaft docking: Both the left load dynamometer and the right load dynamometer are docked with the electric drive assembly or the assembly to be tested on the test position through the guide rail quick docking device;

D) Test: automatically carry out various tests on the electric drive assembly or the assembly to be tested under the automatic program set by the bench;

E) The end of the test: the operator pulls out the strong electricity and the waterway, the left load dynamometer and the right load dynamometer are connected to the electric drive assembly or the waiting device on the test position through the guide rail quick docking device The detection assembly is separated, and after the assembly tray rises and is attached to the electric drive assembly or the assembly to be inspected, the stand support plate releases the electric drive assembly or the assembly to be inspected, and the assembly Return to position in a pallet, transfer the electric drive assembly off-line to other stations, or remove the reducer on the assembly to be inspected and transfer to other stations.

Preferably, the assembly tray is provided with a plurality of support and positioning pins whose height and position can be adjusted. In step A), when the electric drive assembly or the assembly to be detected is moved to the assembly tray, By adjusting the support and positioning pins, the assembly tray is adapted to the electric drive assembly or the assembly to be inspected.

Preferably, two sides of the test position are provided with first horizontal guide rails perpendicular to the base of the bench, the assembly tray is located on the first horizontal guide rail, and the assembly tray is a three-layer mechanism, so From bottom to top, the assembled tray includes a first layer of trays, a second layer of trays arranged on the first layer of trays, and a third layer of trays arranged on the second layer of trays, the first layer of trays is located at On the first horizontal guide rail, the bottom of the first layer tray is provided with a first pushing device that pushes the first layer tray to move on the first horizontal guide rail, the first layer tray and the second layer tray There is a second horizontal guide rail perpendicular to the first horizontal guide rail, and the bottom of the second layer tray is provided with a second pushing device that pushes the second layer tray to move on the second horizontal guide rail, so The third layer tray is provided with a third pushing device for lifting the third layer tray from the second layer tray. In step A), the initial position of the assembly tray is located on the table After moving the electric drive assembly or the assembly to be tested to the assembly tray, the assembly tray moves on the first horizontal guide rail to the assembly tray through the first pushing device test position, and then the third layer of trays are lifted by the third push device to align with the bench support plate, and then the second layer of trays are pushed along the first layer by the second push device. Two horizontal guide rails move toward the gantry support plate.

Preferably, a side of the bench support plate close to the test position is provided with an adapter plate that cooperates with the electric drive assembly and the assembly to be tested, and the bench support plate is also provided with the test an air gap detection sensor for the gap between the adapter plate and the electric drive assembly or the assembly to be inspected, and at least three clamps are arranged on the stand support plate to clamp the electric drive assembly or the assembly to be inspected In the step B), after the adapter plate on the gantry support plate is matched with the electric drive assembly or the assembly to be detected, the air gap detection sensor detects the adapter plate. The electric drive assembly or the to-be-tested assembly is clamped by the clamping tool after the clearance between the matching plate and the electric drive assembly or the assembly to be inspected meets the requirements.

Preferably, the side of the bench support plate close to the test position is further provided with an automatic oiling tool that cooperates with the electric drive assembly and the oiling and draining nozzle on the assembly to be tested. In the step B), pass the After the electric drive assembly or the assembly to be inspected is fixed by the bench support plate, the automatic oiling tool is docked with the oil filling and draining nozzle on the electric drive assembly or the assembly to be inspected, and quantitative lubrication is added. Run oil.

Preferably, an NVH test tool is installed on the bench base through a bracket, and the NVH test tool is located above the test position. In the step B), the electric drive assembly or the electric drive assembly or the After the to-be-tested assembly is fixed, the NVH test tool is lowered and pressed against the electric drive assembly or the to-be-tested assembly.

Compared with the prior art, the present invention has the following advantages:

1. The reducer test is carried out through the electric drive assembly off-line test bench. Only one bench is needed to test the electric drive assembly and the reducer, which greatly reduces the waste of resources and reduces the production cost;

2. The height-adjustable support locating pin on the assembly tray can be adapted to different electric drive assemblies and reducers, with strong compatibility, and the stability of the support is improved by adjusting the support locating pin;

3. The test arrangement of the electric drive assembly and the reducer can be freely realized according to the production schedule, and different test functions can be realized for different test products, which can meet the test requirements under specific working conditions.

Description of drawings

Fig. 1 is the top-view structural schematic diagram of the electric drive assembly off-line test bench compatible with the reducer test of the present invention;

Fig. 2 is the structural representation of the assembly tray in Fig. 1;

FIG. 3 is a schematic structural diagram of the side surface of the gantry support plate in FIG. 1 .

The parts in the figure are labeled as follows:

Bench base 1, test position 2, assembly tray 3, left load dynamometer 4, right load dynamometer 5, guide rail quick docking device 6, bench support plate 7, support positioning pin 8, first horizontal guide rail 9 , the first tray 10, the second tray 11, the third tray 12, the first pusher 13, the second horizontal guide 14, the second pusher 15, the third pusher 16, the adapter plate 17, the air gap Detection sensor 18 , clamping tool 19 , automatic oiling tool 20 , torque sensor 21 , diaphragm coupling 22 , NVH test tool 23 .

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1, Figure 2 and Figure 3, the electric drive assembly offline test bench compatible with the reducer test of the present invention includes a bench base 1, and the bench base 1 is provided with a test position for placing the electric drive assembly 2. An assembly tray 3 is arranged below the test position 2, and the bench base 1 is also provided with a left load dynamometer 4 and a right load dynamometer 5 on both sides of the test position 2. The left load dynamometer 4 and The right load dynamometer 5 is connected to the electric drive assembly on the test position 2 through the guide rail quick docking device 6. One side of the test position 2 is provided with a bench support plate 7 for fixing the electric drive assembly. The accompanying test power motor on the tester, the accompanying test power motor and the reducer are combined to form a to-be-tested assembly, and the to-be-tested assembly can be fixed on the bench support plate 7. When the to-be-tested assembly is detected, the left load dynamometer 4 and the The right load dynamometer 5 is docked with the assembly to be tested on the test position 2 through the guide rail quick docking device 6 .

Among them, as shown in FIG. 2 , the assembly tray 3 is provided with a number of support positioning pins 8 whose height and position can be adjusted. Combined with FIG. 1 and FIG. 2 , both sides of the test position 2 are provided with the bench base 1 The vertical first horizontal guide rail 9, the assembly tray 3 is located on the first horizontal guide rail 9, the assembly tray 3 is a three-layer mechanism, and the assembly tray 3 includes a first layer of trays 10 from bottom to top, and is located on the first layer of trays 10. The second layer of tray 11 and the third layer of tray 12 located on the second layer of tray 11, the first layer of tray 10 is located on the first horizontal guide rail 9, the bottom of the first layer of tray 10 The first propulsion device 13 moves on the first horizontal guide rail 9, a second horizontal guide rail 14 perpendicular to the first horizontal guide rail 9 is provided between the first layer tray 10 and the second layer tray 11, and the bottom of the second layer tray 11 is provided There is a second pusher 15 for pushing the second layer tray 11 to move on the second horizontal guide rail 14, and the third layer tray 12 is provided with a third pusher for lifting the third layer tray 12 from the second layer tray 11 device 16.

1 and 3, the side of the bench support plate 7 close to the test position 2 is provided with an adapter plate 17 that cooperates with the electric drive assembly and the assembly to be detected, and the bench support plate 7 is also provided with a detection plate 17. An air gap detection sensor 18 for the gap between the adapter plate 17 and the electric drive assembly or the assembly to be inspected, and three clamping toolings 19 for clamping the electric drive assembly or the assembly to be inspected are provided on the stand support plate 7 , the side of the bench support plate 7 close to the test position 2 is also provided with an automatic refueling tooling 20 that cooperates with the electric drive assembly and the oil filling nozzle on the to-be-tested assembly.

In this embodiment, as shown in FIG. 1 , the output shafts of the left load dynamometer 4 and the right load dynamometer 5 are provided with torque sensors 21 , and the guide rail quick docking device 6 is provided with a diaphragm coupling 22 , An NVH test tool 23 is installed on the bench base 1 through a bracket, and the NVH test tool 23 is located above the test position 2 .

The test method of the electric drive assembly offline test bench compatible with the reducer test in this embodiment includes the following steps:

A) Transfer to the assembly tray 3: When testing the electric drive assembly, directly transfer the electric drive assembly to the assembly tray 3. When testing the reducer, install the accompanying power motor on the reducer to form the assembly to be tested , transfer the assembly to be inspected to the assembly tray 3, and manually connect the strong electricity and water routes with quick butt joints, wherein, by adjusting the support and positioning pins 8, the assembly tray 3 is connected to the electric drive assembly or the to-be-detected The assembly is adapted. In addition, the initial position of the assembly tray 3 is located on the outside of the bench base 1. After the electric drive assembly or the assembly to be tested is moved to the assembly tray 3, the assembly tray 3 passes through the first pushing device 13. Move to the test position 2 on the first horizontal guide rail 9 , and then lift the third layer of trays 12 through the third pusher 16 to align with the bench support plate 7 , and then push the second layer of trays through the second pusher 15 . 11 moves to the gantry support plate 7 along the second horizontal guide rail 14;

B) Fixing: fix the electric drive assembly or the assembly to be detected by the stand support plate 7, specifically, after the adapter plate 17 on the stand support plate 7 is matched with the electric drive assembly or the assembly to be inspected, The gap between the adapter plate 17 and the electric drive assembly or the assembly to be inspected is detected by the air gap detection sensor 18. After meeting the requirements, the electric drive assembly or the assembly to be inspected is clamped by the clamping tool 19, and then oil is automatically added. The tooling 20 is docked with the oil filling and draining nozzle on the electric drive assembly or the assembly to be tested, and the quantitative lubrication and pre-running oil are added. The complete tray 3 is lowered, so that the electric drive assembly or the assembly to be tested is separated from the assembly tray 3;

C) docking of the load half shaft: the left load dynamometer 4 and the right load dynamometer 5 are connected to the electric drive assembly or the assembly to be detected on the test position 2 through the guide rail quick docking device 6;

D) Test: The electric drive assembly or the assembly to be tested is automatically tested under the automatic program set by the bench. In this embodiment, the test items are in accordance with the "Evaluation Specification for Electric Vehicle Integrated Electric Drive Assembly System" 》, the user can also set the automatic cycle conditions required by other customers;

E) The end of the test: the operator pulls out the strong electricity and the waterway, the left load dynamometer 4 and the right load dynamometer 5 are separated from the electric drive assembly or the assembly to be tested on the test position 2 through the guide rail quick docking device 6 , after the assembly tray 3 is lifted up and attached to the electric drive assembly or the assembly to be inspected, the stand support plate 7 releases the electric drive assembly or the assembly to be inspected, the assembly tray 3 returns, and the electric drive assembly is lowered Transfer the line to another station, or remove the reducer on the assembly to be tested and transfer it to another station.

The electric drive assembly off-line test bench compatible with the reducer test of the present invention and the test method thereof, the reducer test is carried out through the electric drive assembly off-line test bench, and only one bench is needed to carry out the electric drive assembly and deceleration. The test of the electric drive greatly reduces the waste of resources and reduces the production cost; and through the height-adjustable support and positioning pins 8 on the assembly tray 3, it can be adapted to different electric drive assemblies and reducers, with strong compatibility. And the stability of the support is improved by adjusting the support positioning pin 8; in addition, the test arrangement of the electric drive assembly and the reducer can be freely realized according to the production scheduling, and different test functions can be realized for different test products, which can meet specific working conditions. test requirements below.

Claims (14)

1. The utility model provides a compatible electric drive assembly test bench that rolls off production line of reduction gear test, includes rack base (1), be equipped with test position (2) of placing the electric drive assembly on rack base (1), test position (2) below is provided with assembly tray (3), still be equipped with on rack base (1) and be located respectively the left load dynamometer (4) and the right load dynamometer (5) of test position (2) both sides, left side load dynamometer (4) and right load dynamometer (5) all through quick interfacing apparatus of guide rail (6) with the butt joint of electric drive assembly on the test position (2), one side of test position (2) is equipped with fixedly the rack backup pad (7) of electric drive assembly, its characterized in that: still including installing the company's of company on the reduction gear and survey motor power, company survey motor power with the reduction gear makes up and waits to detect the assembly, it can fix to detect the assembly on rack backup pad (7), it detects when examining the assembly and detects, left side load dynamometer (4) and right load dynamometer (5) all pass through quick interfacing apparatus of guide rail (6) with the assembly butt joint that detects of (2) on the test position.

2. The electrical drive assembly off-line test bench compatible with retarder testing of claim 1, further comprising: the assembly tray (3) is provided with a plurality of supporting and positioning pins (8) with adjustable height and position.

3. The electrical drive assembly off-line test bench compatible with retarder testing of claim 1, further comprising: the two sides of the test position (2) are provided with first horizontal guide rails (9) perpendicular to the rack base (1), the assembly tray (3) is positioned on the first horizontal guide rails (9), the assembly tray (3) is a three-layer mechanism, the assembly tray (3) comprises a first layer tray (10), a second layer tray (11) arranged on the first layer tray (10) and a third layer tray (12) arranged on the second layer tray (11) from bottom to top, the first layer tray (10) is positioned on the first horizontal guide rails (9), the bottom of the first layer tray (10) is provided with a first propelling device (13) for propelling the first layer tray (10) to move on the first horizontal guide rails (9), and second horizontal guide rails (14) perpendicular to the first horizontal guide rails (9) are arranged between the first layer tray (10) and the second layer tray (11), and a second propelling device (15) for pushing the second layer tray (11) to move on the second horizontal guide rail (14) is arranged at the bottom of the second layer tray (11), and a third propelling device (16) for jacking the third layer tray (12) from the second layer tray (11) is arranged on the third layer tray (12).

4. The electrical drive assembly off-line test bench compatible with retarder testing of claim 1, further comprising: one side of the rack support plate (7) close to the test position (2) is provided with an adapter plate (17) matched with the electric drive assembly and the assembly to be detected, the rack support plate (7) is further provided with an air gap detection sensor (18) for detecting a gap between the adapter plate (17) and the electric drive assembly or the assembly to be detected, and the rack support plate (7) is provided with at least three clamping tools (19) for clamping the electric drive assembly or the assembly to be detected.

5. The electrical drive assembly off-line test bench compatible with retarder testing of claim 1, further comprising: and an automatic oiling tool (20) matched with the electric drive assembly and an oil discharge nozzle added on the assembly to be detected is further arranged on one side, close to the test position (2), of the rack support plate (7).

6. The electrical drive assembly off-line test bench compatible with retarder testing of claim 1, further comprising: and torque sensors (21) are arranged on output shafts of the left load dynamometer (4) and the right load dynamometer (5).

7. The electrical drive assembly off-line test bench compatible with retarder testing of claim 1, further comprising: and a diaphragm coupling (22) is arranged on the guide rail quick butt joint device (6).

8. The electrical drive assembly off-line test bench compatible with retarder testing of claim 1, further comprising: the NVH test tool (23) is installed on the rack base (1) through a support, and the NVH test tool (23) is located above the test position (2).

9. A method for testing an electric drive assembly off-line test bench compatible with retarder testing according to claim 1, comprising the steps of: the method comprises the following steps:

A) transfer to assembly tray (3): when the electric drive assembly is tested, the electric drive assembly is directly transferred to the assembly tray (3), when the speed reducer is tested, the accompanied power motor is installed on the speed reducer to form an assembly to be detected, the assembly to be detected is transferred to the assembly tray (3), and strong electricity and water circuits are manually connected by an operator through a quick butt joint;

B) fixing: fixing the electric drive assembly or the assembly to be detected through the rack support plate (7), and then descending the assembly tray (3) to separate the electric drive assembly or the assembly to be detected from the assembly tray (3);

C) butt joint of load half shafts: the left load dynamometer (4) and the right load dynamometer (5) are in butt joint with the electric drive assembly or the assembly to be detected on the test position (2) through the guide rail quick butt joint device (6);

D) and (3) testing: automatically carrying out various tests on the electric drive assembly or the assembly to be detected under an automatic program set by the rack;

E) and (4) finishing the test: heavy current and water route are drawn and drawn to the operating personnel, left side load dynamometer (4) and right load dynamometer (5) are all passed through guide rail quick interfacing apparatus (6) with on test position (2) the electric drive assembly or wait to detect the assembly separation, assembly tray (3) rise with the electric drive assembly or wait to detect the assembly laminating back, rack backup pad (7) loosen the electric drive assembly or wait to detect the assembly, assembly tray (3) return will the electric drive assembly rolls off the production line and shifts to other stations, or will it shifts to other stations to wait to detect the reduction gear of detecting on the assembly and pull down.

10. The method of testing the electrical drive assembly off-line test rack compatible with retarder testing of claim 9, further comprising: a plurality of supporting positioning pins (8) with adjustable height and position are arranged on the assembly tray (3), and in the step A), when the electric drive assembly or the assembly to be detected moves to the assembly tray (3), the assembly tray (3) is matched with the electric drive assembly or the assembly to be detected by adjusting the supporting positioning pins (8).

11. The method of testing the electrical drive assembly off-line test rack compatible with retarder testing of claim 9, further comprising: the two sides of the test position (2) are provided with first horizontal guide rails (9) perpendicular to the rack base (1), the assembly tray (3) is positioned on the first horizontal guide rails (9), the assembly tray (3) is a three-layer mechanism, the assembly tray (3) comprises a first layer tray (10), a second layer tray (11) arranged on the first layer tray (10) and a third layer tray (12) arranged on the second layer tray (11) from bottom to top, the first layer tray (10) is positioned on the first horizontal guide rails (9), the bottom of the first layer tray (10) is provided with a first propelling device (13) for propelling the first layer tray (10) to move on the first horizontal guide rails (9), and second horizontal guide rails (14) perpendicular to the first horizontal guide rails (9) are arranged between the first layer tray (10) and the second layer tray (11), a second pushing device (15) for pushing the second layer tray (11) to move on the second horizontal guide rail (14) is arranged at the bottom of the second layer tray (11), a third pushing device (16) for jacking the third layer tray (12) from the second layer tray (11) is arranged on the third layer tray (12), in the step A), the initial position of the assembly tray (3) is located at the outer side of the rack base (1), after the electric drive assembly or the assembly to be detected is moved to the assembly tray (3), the assembly tray (3) moves to the test position (2) on the first horizontal guide rail (9) through the first pushing device (13), then the third layer tray (12) is jacked through the third pushing device (16) and aligned with the rack support plate (7), and then the second pushing device (15) pushes the second layer tray (11) to move along the second horizontal guide rail (14) The rail (14) moves towards the gantry support plate (7).

12. The method of testing the electrical drive assembly off-line test rack compatible with retarder testing of claim 9, further comprising: an adaptive plate (17) matched with the electric drive assembly and the assembly to be detected is arranged on one side of the rack support plate (7) close to the test position (2), an air gap detection sensor (18) for detecting a gap between the adapter plate (17) and the electric drive assembly or the assembly to be detected is also arranged on the stand support plate (7), at least three clamping tools (19) for clamping the electric drive assembly or the assembly to be detected are arranged on the rack support plate (7), in the step B), after an adapter plate (17) on the rack support plate (7) is matched with the electric drive assembly or the assembly to be detected, the gap between the adapter plate (17) and the electric drive assembly or the assembly to be detected is detected by the air gap detection sensor (18), and after the requirement is met, and clamping the electric drive assembly or the assembly to be detected through the clamping tool (19).

13. The method of testing the electrical drive assembly off-line test rack compatible with retarder testing of claim 9, further comprising: and an automatic oiling tool (20) matched with an oil adding and discharging nozzle on the electric drive assembly and the assembly to be detected is further arranged on one side, close to the test position (2), of the rack support plate (7), in the step B), after the electric drive assembly or the assembly to be detected is fixed through the rack support plate (7), the automatic oiling tool (20) is in butt joint with the oil adding and discharging nozzle on the electric drive assembly or the assembly to be detected, and quantitative lubrication is added to pre-drain oil.

14. The method of testing the electrical drive assembly off-line test rack compatible with retarder testing of claim 9, further comprising: the NVH test tool (23) is mounted on the rack base (1) through a support, the NVH test tool (23) is located above the test position (2), and in the step B), after the electric drive assembly or the assembly to be detected is fixed through the rack supporting plate (7), the NVH test tool (23) descends to abut against the electric drive assembly or the assembly to be detected.

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