Motor test workbench

Abstract

The utility model relates to a motor test workbench, which is characterized by comprising a base, a first rack, a second rack and a test accompanying motor, the first rack and the second rack are arranged on the same side of the base; the test accompanying motor is arranged between the first rack and the second rack; the first rack is provided with a first placing hole, and the first placing hole is suitable for fixing a tested motor. The first rack is provided with a shaft fixing part, and the shaft fixing part is located on the inner side of the first placing hole; the shaft fixing part and the first placing hole are coaxially arranged; an output shaft of the test accompanying motor penetrates through the first rack through a shaft fixing part; the second rack is provided with a second placing hole, and the second placing hole is suitable for fixing a test-accompanying motor. The whole device is convenient to move, under the action of the first rack and the second rack, the stability of the tested motor and the test accompanying motor in the testing process can be effectively improved, the shaft fixing part stably fixes the output shaft, the output shaft is made to be located on the same axis all the time, and the output shaft can be effectively prevented from falling off and deviating during high-speed operation.

Description

Technical Field

[0001] The present application relates to the technical field of motor testing, and in particular to a motor testing workbench. Background Art

[0002] For the vector control of new energy motors, the motor's rotor speed and torque are key parameters. The accuracy and linearity of this parameter have a great impact on the vector control performance of new energy motors. The motor dragging method experiment is a common motor performance test method, which is mainly used to measure the mechanical characteristics of the motor, especially the performance under different load conditions. When testing the rotor speed and torque of the motor, the entire test process requires the accompanying motor and the motor under test to drag each other, so the relative stability between the accompanying motor and the motor under test will affect the coaxiality of the two and the accuracy of the test results. How to improve the fixed stability of the accompanying motor and the motor under test during the test process has become an urgent problem to be solved in this field. Summary of the invention

[0003] In view of this, the present application proposes a motor testing workbench, which is suitable for improving the stability of the motor under test and the accompanying motor during the testing process.

[0004] According to one aspect of the present application, a motor test workbench is provided, characterized in that it comprises: a base, a first stand, a second stand and a companion test motor;

[0005] The first stand and the second stand are both arranged on the same side of the base;

[0006] The accompanying test motor is arranged between the first frame and the second frame;

[0007] The first stand is provided with a first placement hole, and the first placement hole is suitable for fixing the motor to be tested;

[0008] The first stand is provided with a shaft fixing part, which is located inside the first placement hole; the shaft fixing part is coaxially arranged with the first placement hole; the output shaft of the accompanying test motor passes through the first stand through the shaft fixing part;

[0009] The second stand is provided with a second placement hole, and the second placement hole is suitable for fixing the accompanying test motor.

[0010] In a possible implementation, both the first rack and the second rack are provided with a mounting plate;

[0011] The first rack and the second rack are both connected to the base through a mounting plate.

[0012] In a possible implementation, the device further includes: a bearing;

[0013] The bearing is provided between the output shaft and the shaft fixing portion.

[0014] In a possible implementation, two bearings are provided;

[0015] The two bearings are adjacently arranged between the output shaft and the shaft fixing portion.

[0016] In a possible implementation, it further includes: a bearing shaft stop;

[0017] The bearing shaft stopper and the bearing are both sleeved on the output shaft; the bearing shaft stopper is closely arranged on the bearing.

[0018] In a possible implementation, the first stand is provided with more than two mounting holes;

[0019] The two or more mounting holes are arranged around the outer side of the first placement hole.

[0020] In a possible implementation, the companion motor includes: a rotor assembly, a stator assembly and a housing assembly;

[0021] The rotor assembly and the stator assembly are both arranged inside the cavity of the housing assembly;

[0022] The rotor assembly includes: an output shaft, a rotor core and two or more magnetic steels; the rotor core is sleeved on the output shaft, and the two or more magnetic steels are embedded in the rotor core;

[0023] The stator assembly is sleeved on the rotor core.

[0024] In a possible implementation, the housing assembly includes: an end cover and a housing;

[0025] The end cover is arranged at one end of the shell; the end cover matches the second placement hole, and the end cover is arranged in the second placement hole.

[0026] In a possible implementation, the housing is provided with a fixing ring;

[0027] The end cover and the fixing ring are respectively arranged at two opposite ends of the shell, and the fixing ring is arranged close to the first frame.

[0028] In a possible implementation, the first stand is provided with a limit ring;

[0029] The limiting ring and the mounting hole are respectively located on two opposite sides of the first frame;

[0030] The fixing ring matches the limiting ring, and the limiting ring is sleeved on the fixing ring.

[0031] Beneficial effects: The application is easy to move as a whole. Under the action of the first and second test stands, the stability of the motor under test and the accompanying motor under test can be effectively improved during the test, ensuring the coaxiality of the two. At the same time, the shaft fixing part firmly fixes the output shaft, so that the output shaft is always located on the same axis, which can effectively prevent the output shaft from falling off and running off when running at high speed, and can accurately measure the performance of the motor under test; the application has a simple overall structure, small size, light weight, and is easy to move.

[0032] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0034] Figure 1 A cross-sectional view showing a motor test bench according to an embodiment of the present application;

[0035] Figure 2 Show Figure 1 A partial enlarged view of

[0036] Figure 3 Show Figure 1 A partial enlarged view of

[0037] Figure 4 An exploded view of the structure of the motor test bench according to an embodiment of the present application is shown;

[0038] Figure 5 The main structure diagram of the motor test workbench according to the embodiment of the present application is shown.

[0039] Base 100, first stand 200, shaft fixing portion 210, first placement hole 230, output shaft 620, second stand 300, second placement hole 310, first bearing 621, second bearing 622, hole retaining ring 623, stator assembly 500, rotor core 600, magnetic steel 610, end cover 700, housing 400, fixing ring 410, limiting ring 240, measured motor 1000, resolver stator 800, third bearing 720, gasket 721, resolver rotor 900, resolver stator pressure plate 810, double stacked self-locking anti-loosening washer 910, plug 710, mounting portion 750, limiting ring 240, measured motor connector 640, locking key 626, fixing bolt 670, bearing shaft stop 625, blocking piece 627. DETAILED DESCRIPTION

[0040] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0041] Among them, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0044] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0045] Figure 1 A cross-sectional view showing a motor test bench according to an embodiment of the present application; Figure 2 Show Figure 1 A partial enlarged view of Figure 3 Show Figure 1 A partial enlarged view of Figure 4 An exploded view of the structure of the motor test bench according to an embodiment of the present application is shown; Figure 5 The main structure diagram of the motor test bench of the embodiment of the present application is shown in FIG. Figure 1As shown, the motor test workbench is characterized in that it includes: a base 100, a first stand 200, a second stand 300 and a test motor; the first stand 200 and the second stand 300 are both arranged on the same side of the base 100; the test motor is arranged between the first stand 200 and the second stand 300; the first stand 200 is provided with a first placement hole 230, and the first placement hole 230 is suitable for fixing the motor 1000 under test; the first stand 200 is provided with an axis fixing portion 210, and the axis fixing portion 210 is located on the inner side of the first placement hole 230; the axis fixing portion 210 is coaxially arranged with the first placement hole 230; the output shaft 620 of the test motor passes through the first stand 200 through the axis fixing portion 210; the second stand 300 is provided with a second placement hole 310, and the second placement hole 310 is suitable for fixing the test motor.

[0046] Here, it should be noted that the base 100 is suitable for placing the first stand 200 and the second stand 300; the first stand 200 and the second stand 300 are arranged opposite to each other, the accompanying motor for testing is located between the first stand 200 and the second stand 300, the first placement hole 230 of the first stand 200 is suitable for installing the motor 1000 to be tested, the second placement hole 310 of the second stand 300 is suitable for installing the accompanying motor for testing, and the shaft fixing portion 210 in the middle of the first placement hole 230 is suitable for passing the output shaft 620 of the accompanying motor for testing, and the output shaft 620 is connected to the motor 1000 to be tested, so that the motor 1000 to be tested drags the accompanying motor for testing to rotate. Under the action of the base 100, the present application is easy to move as a whole, and under the action of the first stand 200 and the second stand 300, the stability of the motor 1000 to be tested and the accompanying motor for testing can be effectively improved during the testing process, and the coaxiality of the two can be ensured. At the same time, the shaft fixing part 210 firmly fixes the output shaft 620, so that the output shaft 620 is always located on the same axis, which can effectively prevent the output shaft 620 from falling off and deviating when running at high speed, and can accurately measure the performance of the motor 1000 under test; the overall structure of the present application is simple, small in size, light in weight, and easy to move.

[0047] Furthermore, the main body of the base 100 is a rectangular plate-shaped structure. The first rack 200 and the second rack 300 are both rectangular plate-shaped structures, and the first rack 200 and the second rack 300 are respectively vertically arranged on the base 100 .

[0048] In a possible implementation, both the first rack 200 and the second rack 300 are provided with a mounting plate; and both the first rack 200 and the second rack 300 are connected to the base 100 via the mounting plate. Figure 4 As shown, the main body of the mounting plate is a rectangular plate structure, and the mounting plate is provided with four bolt holes. The first stand 200 is vertically arranged on the mounting plate, and the mounting plate is fixed to the base 100 by four bolts 320 .

[0049] In a possible implementation, the first placement hole 230 and the second placement hole 310 are both circular hole structures, and the first placement hole 230 and the second placement hole 310 are arranged opposite to each other with the same center.

[0050] In a possible implementation, the main body of the shaft fixing part 210 is a circular tubular structure, one end of the shaft fixing part 210 is suspended, the other end of the shaft fixing part 210 is connected to the first stand 200, and the middle part of the shaft fixing part 210 is for the output shaft 620 to pass through.

[0051] In a possible implementation, it further includes: a first bearing 621; the first bearing 621 is disposed between the output shaft 620 and the shaft fixing portion 210. Here, it should be noted that the first bearing 621 serves as a transition device between the shaft fixing portion 210 and the output shaft 620, and ensures the stable installation of the output shaft 620 while ensuring the normal rotation of the output shaft 620.

[0052] In a possible implementation, two bearings are provided; both bearings are arranged between the output shaft 620 and the shaft fixing portion 210. Figure 1 As shown, the first bearing portion 621 and the second bearing 622 are respectively located at two ends of the shaft fixing portion 210 . The arrangement of the two bearings can effectively improve the rotation stability of the output shaft 620 .

[0053] In a possible implementation, the device further includes: a hole retaining spring 623; the hole retaining spring 623 and the first bearing 621 are both sleeved on the output shaft 620; and the hole retaining spring 623 is closely attached to the first bearing 621. Figure 2 As shown, the inner ring of the first bearing 621 is sleeved on the outer side of the output shaft 620, and the outer ring of the first bearing 621 is embedded in the inner side of the shaft fixing part 210 to improve the fixing stability of the first bearing 621, and one side of the hole retaining ring 623 is set close to the first bearing 621 to further improve the fixing stability of the first bearing 621.

[0054] In a possible implementation, the inner ring of the bearing shaft stop 625 is sleeved on the outer side of the output shaft 620 , and the bearing shaft stop 625 is arranged close to the first bearing 621 to improve the fixing stability of the first bearing 621 .

[0055] In a possible implementation, it further includes: a spring piece 624 ; the spring piece 624 and the inner ring of the second bearing 622 are sleeved on the outer side of the output shaft 620 , and one side of the spring piece 624 is closely attached to the second bearing 622 .

[0056] In a possible implementation, the first rack 200 is provided with more than two mounting holes; the more than two mounting holes are arranged around the outer side of the first placement hole 230. It should be noted that when the motor 1000 under test is placed in the first placement hole 230, the housing 400 of the motor 1000 under test is fixed to the first rack 200 by bolts 220.

[0057] In a possible implementation, the test motor includes: a rotor assembly, a stator assembly 500 and a housing assembly; the rotor assembly and the stator assembly 500 are both arranged inside the cavity of the housing assembly; the rotor assembly includes: an output shaft 620, a rotor core 600 and two or more magnetic steels 610; the rotor core 600 is sleeved on the output shaft 620, and the two or more magnetic steels 610 are embedded in the rotor core 600; the stator assembly 500 is sleeved on the rotor core 600. Here, it should be noted that the housing assembly can fix the stator assembly 500, and protect and isolate the internal rotor assembly and stator assembly 500 to prevent external interference with the normal operation of the motor and extend the service life of the overall structure. The stator assembly 500 is suitable for generating a rotating magnetic field, and the main function of the rotor assembly is to be cut by magnetic lines of force in the rotating magnetic field and then generate (output) current; the magnetic steel 610 is directly placed inside the rotor core 600, so that the strength of the rotor assembly is improved while the magnetic steel 610 is not easy to deform.

[0058] In a possible implementation, the rotor core 600 is fixed to the middle of the output shaft 620, one end of the output shaft 620 is inserted into the shaft fixing portion 210, and the other end is inserted into the housing assembly. The two rotor baffles 630 are fixedly connected to the two end surfaces of the rotor core 600 by welding, so as to limit and seal the internal magnetic steel 610. Furthermore, the main bodies of the two rotor baffles 630 are the same and both have a circular ring structure, and the outer diameters of the two rotor baffles 630 are the same as the diameter of the rotor core 600.

[0059] In a possible implementation, the output shaft 620 is provided with a limiting portion, which is closely arranged with one of the rotor baffles 630 and is suitable for limiting the position of the rotor assembly. The main body of the limiting portion is an annular structure and is protrudingly arranged on the output shaft 620.

[0060] In a possible implementation, the stator assembly 500 includes: a stator core and a winding; the winding is sleeved on the outside of the stator core.

[0061] In a possible implementation, the housing assembly includes: an end cap 700 and a housing 400; the end cap 700 is disposed at one end of the housing 400; the end cap 700 matches the second placement hole 310, and the end cap 700 is disposed in the second placement hole 310. It should be noted that the second placement hole 310 fixes the companion motor by fixing the end cap 700. Figure 4As shown, the main body of the housing 400 is a hollow cylindrical structure, and a plurality of bolt holes are formed around the end surface of one end of the housing 400 connected to the end cover 700, and the end cover 700 is fixed to the housing 400 through the bolt holes. The main body of the end cover 700 is an annular structure, and the through hole in the middle of the end cover 700 is suitable for passing the output shaft 620 and installing the resolver stator 800; the outer surface of the end cover 700 matches the second placement hole 310, and the end cover 700 is inserted into the second placement hole 310. Further, the housing 400 is provided with a water flow channel 401, which is suitable for circulating the coolant.

[0062] In a possible implementation, the third bearing 720 and the gasket 721 are also included; the third bearing 720 is disposed between the output shaft 620 and the end cover 700, and the gasket 721 is disposed close to the third bearing 720. Figure 3 As shown, the outer ring of the third bearing 720 is embedded in the inner wall of the end cover 700, and the inner ring of the third bearing 720 is sleeved on the output shaft 620. The main body of the gasket 721 is annular and sleeved on the output shaft 620, and one side of the gasket 721 is in close contact with the third bearing 720.

[0063] In a possible implementation, it further includes: a corrugated spring piece; the corrugated spring piece is sleeved on the output shaft 620 , and the corrugated spring piece is closely arranged on the resolver stator 800 .

[0064] In a possible implementation, it also includes: a rotary stator 800; Figure 3 As described above, the resolver stator 800 is embedded in the inner wall of the end cover 700 and is fixedly connected to the end cover 700 .

[0065] In a possible implementation, the invention further includes: a rotary rotor 900; Figure 3 As shown, the resolver rotor 900 is sleeved on the output shaft 620 , and the resolver stator 800 is sleeved on the outer side of the resolver rotor 900 .

[0066] In a possible implementation, it also includes: a rotary stator pressure plate 810; Figure 3 As shown, the main body of the resolver stator pressure plate 810 is annular in structure, and the resolver stator pressure plate 810 is sleeved on the outside of the resolver stator 800 .

[0067] In a possible implementation, it also includes: a double stacked self-locking anti-loosening washer 910; Figure 3 As shown, the double-stacked self-locking anti-loosening washer 910 is sleeved on the output shaft 620 , and one side of the double-stacked self-locking anti-loosening washer 910 is arranged closely against the resolver rotor 900 to limit the resolver rotor 900 .

[0068] In a possible implementation, the method further includes: blocking 710; Figure 1As shown, the main body of the plug 710 is a disc-shaped structure, one side of the plug 710 is set close to the end cover 700, and the plug 710 is fixed to the outer end surface of the end cover 700 by multiple bolts to seal and isolate the through hole in the middle of the end cover 700 and the output shaft 620 inside it.

[0069] In a possible implementation, the outer wall of the end cover 700 is provided with a mounting portion 750, and the end cover 700 is fixedly connected to the second stand 300 through the mounting portion 750. Figure 3 As shown, the main body of the mounting portion 750 is an annular structure, which is sleeved on the outer side of the end cover 700. A plurality of bolt holes are provided on the mounting portion 750, and a plurality of bolt holes are also provided around the second placement hole 310 of the second stand 300. When the end cover 700 is placed on the second stand 300, the mounting portion 750 is locked with the second stand 300 by bolts 740 to improve the stability of the installation of the accompanying motor.

[0070] In a possible implementation, the housing 400 is provided with a fixing ring 410; the end cover 700 and the fixing ring 410 are respectively arranged at opposite ends of the housing 400, and the fixing ring 410 is arranged close to the first frame 200. It should be noted that a plurality of bolt holes are opened around the surface of the fixing ring 410, and the fixing ring 410 is fixedly connected to the first frame 200 by bolts to achieve the installation of the accompanying test motor.

[0071] In a possible implementation, the first rack 200 is provided with a limiting ring 240; the limiting ring 240 and the mounting hole are respectively located on two opposite sides of the first rack 200; the fixing ring 410 matches the limiting ring 240, and the limiting ring 240 is sleeved on the fixing ring 410. Figure 2 As shown, the limit ring 240 is integrally arranged with the first stand 200, and the limit ring 240 is a protruding ring structure. When the fixing ring 410 of the outer shell 400 abuts against the first stand 200, the limit ring 240 is inserted into the inner side of the fixing ring 410, and plays a role in positioning and supporting the fixing ring 410, further improving the installation stability of the accompanying test motor.

[0072] In a possible implementation, it also includes: a tested motor connector 640; the main body of the tested motor connector 640 is a cylindrical structure, the tested motor connector 640 is sleeved on one end of the output shaft 620, and the tested motor 1000 is sleeved on the outside of the tested motor connector 640; further, the tested motor 1000 connector 640 is fixedly connected to the rotor of the tested motor 1000, and when the tested motor 1000 rotates, it drives the output shaft 620 to rotate, and the output shaft 620 drives the accompanying motor to rotate.

[0073] In a possible implementation, it also includes: a locking key 626; the tested motor connecting member 640 is fixedly connected to the output shaft 620 via the locking key 626; Figure 1 As shown, a locking key hole is provided on the inner side of the motor connector 640 under test, and a locking key hole is provided on the outer side of the output shaft 620 . The two locking key holes are fixed by a locking key 626 to achieve a fixed connection between the motor connector 640 under test and the output shaft 620 .

[0074] In a possible implementation, it further includes: a fixing bolt 670 and a baffle 627; the baffle 627 is fixedly arranged at one end of the output shaft 620, the length direction of the output shaft 620 is perpendicular to the plane where the baffle 627 is located, and the baffle 627 is fixedly connected to the output shaft 620 via the fixing bolt 670. It should be noted that the baffle 627 is suitable for limiting and fixing the motor connector 640 to be tested, so as to prevent the motor connector 640 to be tested from being separated from the output shaft 620 during rotation.

[0075] In a possible implementation, it further includes: a socket 730; the socket 730 is fixedly arranged on the end cover 700, and the socket 730 is connected to the three-phase line of the accompanying test motor and is connected to the three-phase line of the external controller.

[0076] In a possible implementation, it also includes: a quick-screw connector 430; the quick-screw connector 430 is fixedly arranged on the side wall of the shell 400, one end of the quick-screw connector 430 is connected to the internal cavity of the shell 400, and the other end of the quick-screw connector 430 is connected to a water pipe, which is suitable for injecting coolant into the water flow channel 401 of the shell 400, thereby water-cooling the accompanying motor.

[0077] In a possible implementation, it also includes: a socket 420; the socket 420 is connected to the end cover 400, the socket 420 is connected to the resolver stator 800, and is further connected to the resolver aviation plug of the external controller.

[0078] The test process of the present application is as follows: the motor 1000 to be tested is mounted on the first test stand 200, the motor 1000 to be tested is controlled to rotate, the motor 1000 to be tested drives the accompanying motor to be tested behind to rotate, the data outputted through the socket 730 and the socket 420 are processed according to the detection program, and finally the parameters of the motor 1000 to be tested are obtained.

[0079] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A motor test bench, characterized in that: include: Base, first frame, second frame and test motor; The first rack and the second rack are both arranged on the same side of the base; The accompanying test motor is arranged between the first stand and the second stand; The first stand is provided with a first placement hole, and the first placement hole is suitable for fixing the motor to be tested; The first stand is provided with a shaft fixing portion, and the shaft fixing portion is located inside the first placement hole; the shaft fixing portion is coaxially arranged with the first placement hole; the output shaft of the accompanying test motor passes through the shaft fixing portion and penetrates the first stand; The second stand is provided with a second placement hole, and the second placement hole is suitable for fixing the accompanying test motor.

2. The motor test bench according to claim 1, characterized in that: The first rack and the second rack are both provided with a mounting plate; The first rack and the second rack are both connected to the base via the mounting plate.

3. The motor test bench according to claim 1, characterized in that: Also includes: Bearings; The bearing is provided between the output shaft and the shaft fixing portion.

4. The motor test bench according to claim 3, characterized in that: The bearings are provided with two; The two bearings are adjacently arranged between the output shaft and the shaft fixing portion.

5. The motor test bench according to claim 3, characterized in that: Also includes: Bearing shaft stop; The bearing shaft stop and the bearing are both sleeved on the output shaft; the bearing shaft stop is tightly attached to the bearing.

6. The motor test bench according to claim 1, characterized in that: The first stand is provided with more than two mounting holes; The two or more mounting holes are arranged around the outer side of the first placement hole.

7. The motor test bench according to claim 6, characterized in that: The accompanying motor comprises: a rotor assembly, a stator assembly and a housing assembly; The rotor assembly and the stator assembly are both arranged inside the cavity of the housing assembly; The rotor assembly comprises: an output shaft, a rotor core and two or more magnetic steels; the rotor core is sleeved on the output shaft, and the two or more magnetic steels are embedded in the rotor core; The stator assembly is sleeved on the rotor core.

8. The motor test bench according to claim 7, characterized in that: The housing assembly comprises: an end cover and a housing; The end cover is arranged at one end of the shell; the end cover matches the second placement hole, and the end cover is arranged in the second placement hole.

9. The motor test bench according to claim 8, characterized in that: The housing is provided with a fixing ring; The end cover and the fixing ring are respectively arranged at opposite ends of the shell, and the fixing ring is arranged closely against the first stand.

10. The motor test bench according to claim 9, characterized in that: The first stand is provided with a limiting ring; The limiting ring and the mounting hole are respectively located on two opposite sides of the first stand; The fixing ring matches the limiting ring, and the fixing ring is sleeved with the limiting ring.

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