Test tool

Abstract

The utility model discloses a testing tool, which comprises a positioning disc, a transmission shaft and a bearing, and is characterized in that the positioning disc is fixedly connected with a motor shell and is provided with a shaft hole; the transmission shaft is arranged in the shaft hole in a penetrating mode, and the end of the transmission shaft is coaxially connected with the rotor assembly. The bearings are located between the positioning disc and the transmission shaft and comprise the first bearing and the second bearing, and the first bearing and the second bearing are spaced in the axial direction of the transmission shaft. According to the test tool provided by the embodiment of the utility model, the relative positions of the rotor, the motor shell and the stator assembly can be well fixed, so that the rotor assembly is not easy to eccentrically rotate in the test process of the generator, and the stability of the generator test can be ensured. In addition, the structure of the bearing is stable, the bearing is not easy to wear in the rotation process of the transmission shaft, and the test reliability can be well improved.

Description

Technical Field

[0001] This utility model relates to the field of generator testing equipment technology, and in particular to a testing fixture. Background Technology

[0002] In the range extender generator bench test, the generator is disconnected from the engine's connection constraints, and the generator rotor is prone to eccentric rotation relative to the stator, which causes the generator rotor and stator to have an edge suction phenomenon, thus affecting the stability of the test. Utility Model Content

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a testing fixture that prevents rotor assemblies from becoming eccentric, thereby improving testing stability.

[0004] According to an embodiment of the present invention, a test fixture is used for a generator, the generator including a motor housing and a stator assembly and a rotor assembly installed in the motor housing. The test fixture includes: a positioning plate, the positioning plate being fixedly connected to the motor housing, the positioning plate having a shaft hole; a transmission shaft, the transmission shaft passing through the shaft hole, the end of the transmission shaft being coaxially connected to the rotor assembly; and a bearing, the bearing being located between the positioning plate and the transmission shaft, the bearing including a first bearing and a second bearing, the first bearing and the second bearing being spaced apart along the axial direction of the transmission shaft.

[0005] The test fixture according to this utility model embodiment can effectively fix the relative positions of the rotor, motor housing, and stator assembly, thereby preventing the rotor assembly from rotating eccentrically during generator testing and ensuring the stability of generator testing. Furthermore, the bearing structure is relatively robust, reducing wear during drive shaft rotation and significantly improving test reliability.

[0006] In some embodiments of this utility model, the shaft hole has a first end close to the generator and a second end away from the generator, the first bearing is close to the first end, and the second bearing is close to the second end.

[0007] In some embodiments of this utility model, the first end has a first positioning step, and the test fixture further includes: a first bearing end cover, the first bearing end cover is installed on the first end, the surface of the first bearing end cover facing the first bearing has a first positioning protrusion, the first positioning protrusion extends into the shaft hole and cooperates with the first positioning step to restrict the position of the first bearing along the axial direction.

[0008] In some embodiments of the present invention, the first positioning protrusion includes a first positioning protrusion ring, which is configured as an annulus surrounding the axis of the first bearing.

[0009] In some embodiments of this utility model, the second end has a second positioning step, and the test fixture further includes: a second bearing end cover, the second bearing end cover is installed on the second end, the surface of the second bearing end cover facing the second bearing has a second positioning protrusion, the second positioning protrusion extends into the shaft hole and cooperates with the second positioning step to restrict the position of the second bearing along the axial direction.

[0010] In some embodiments of the present invention, the second positioning protrusion includes a second positioning protrusion ring, which is configured as an annulus surrounding the axis of the second bearing.

[0011] In some embodiments of this utility model, the end of the drive shaft facing the rotor assembly has a positioning structure, which is used to position and cooperate with the rotor assembly.

[0012] In some embodiments of this utility model, both the drive shaft and the rotor assembly are provided with opposing first fixing holes, and the test fixture further includes a first fixing member, which cooperates with the first fixing hole to fix the drive shaft and the rotor assembly.

[0013] In some embodiments of this utility model, both the positioning disk and the motor housing are provided with opposing second fixing holes. The test fixture also includes a second fixing member, which cooperates with the second fixing hole to fix the positioning disk and the motor housing together.

[0014] In some embodiments of this utility model, both the positioning disk and the motor housing are provided with corresponding positioning holes, and the test fixture also includes a positioning pin, which cooperates with the positioning hole to position the positioning disk and the motor housing to each other.

[0015] In some embodiments of this utility model, the positioning disk includes a first disk body, a second disk body, and a connecting member. Along the axial direction, the connecting member is connected between the first disk body and the second disk body. The first disk body is fixedly connected to the motor housing, and the second disk body is fixedly connected to the testing device.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the assembled test fixture and generator according to one embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional view of a test fixture according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the positioning disk of a test fixture according to an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the first bearing end cap of the test fixture according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the transmission shaft of a test fixture according to an embodiment of the present invention.

[0023] Figure label:

[0024] 100. Test fixture; 200. Generator; 10. Motor housing; 20. Stator assembly; 30. Rotor assembly;

[0025] 1. Positioning plate; 11. First plate body; 12. Second plate body; 13. Connecting component;

[0026] 2. Drive shaft; 21. Positioning structure; 22. Shaft section; 23. Mating section;

[0027] 31. First bearing; 32. Second bearing;

[0028] 41. First bearing end cap; 411. First locating protrusion ring; 42. Second bearing end cap;

[0029] 51. First fixing hole; 52. Second fixing hole; 53. Positioning hole. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In related technologies, it is necessary to test data such as the torque and power of the generator. However, when testing the generator, the rotor of the generator is prone to eccentric rotation, which affects the testing of the generator.

[0034] Based on this, this application proposes a test fixture 100 for a generator 200. The test fixture 100 can better fix the relative position of the rotor and the motor housing 10, so that the rotor assembly 30 is not prone to eccentric rotation during the test of the generator 200, thereby ensuring the stability of the test of the generator 200.

[0035] The following is for reference. Figures 1-5 The test fixture 100 according to an embodiment of the present utility model is described.

[0036] like Figure 1 As shown, the test fixture 100 according to an embodiment of the present invention can be used for a generator 200. The generator 200 includes a motor housing 10 and a stator assembly 20 and a rotor assembly 30 installed within the motor housing 10. Figure 1 As shown, the rotor assembly 30 is located on the radial inner side of the stator. When the rotor assembly 30 rotates, the generator 200 generates electricity through the relative rotation between the rotor assembly 30 and the stator assembly 20. The specific power generation principle of the generator 200 will not be elaborated here.

[0037] Furthermore, the test fixture 100 includes: a positioning plate 1, a drive shaft 2, and a bearing. The positioning plate 1 is fixedly connected to the motor housing 10 and has a shaft hole. The drive shaft 2 passes through the shaft hole and its end is coaxially connected to the rotor assembly 30. The bearing is located between the positioning plate 1 and the drive shaft 2. The bearing includes a first bearing 31 and a second bearing 32, which are spaced apart along the axial direction of the drive shaft 2.

[0038] In other words, the positioning disk 1 can be fixedly connected to the motor housing 10, while the stator assembly 20 is fixedly connected to the motor housing 10. Thus, the positioning disk 1 and the stator assembly 20 are fixedly connected. Furthermore, the drive shaft 2 is rotatably mounted in the shaft hole of the positioning disk 1 via bearings. Specifically, the drive shaft 2 and the positioning disk 1 are limited by a first bearing 31 and a second bearing 32, making it difficult for the drive shaft 2 to rotate eccentrically relative to the positioning disk 1. Therefore, the positioning disk 1 ensures a relatively stable relative position between the stator assembly 20 and the drive shaft 2. The rotor assembly 30 is coaxially connected to the drive shaft 2, thereby ensuring that the rotor assembly 30 and the stator assembly 20 are in a relatively stable position. The relative position of component 20 is relatively stable. That is, during the rotation of rotor component 30, through the cooperation of positioning disk 1 and transmission shaft 2, and the cooperation of positioning disk 1 and motor housing 10, a stable connection relationship is established between rotor component 30 and motor housing 10 and stator component 20. Rotor component 30 is not easy to rotate eccentrically during rotation. Therefore, in this utility model, the test fixture 100 can better fix the relative position of rotor, motor housing 10 and stator component 20, so that rotor component 30 is not easy to rotate eccentrically during the test of generator 200, thereby ensuring the stability of generator 200 test.

[0039] In addition, the bearing has a relatively stable structure and is not easily worn during the rotation of the drive shaft 2, which can improve the reliability of the test.

[0040] For example, combined Figure 5 As shown, drive shaft 2 is a splined shaft.

[0041] For example, the bearing can be a deep groove ball bearing.

[0042] According to the test fixture 100 of this embodiment, the relative positions of the rotor, motor housing 10, and stator assembly 20 can be effectively fixed, thereby preventing the rotor assembly 30 from rotating eccentrically during the test of the generator 200, thus ensuring the stability of the generator 200 test. Furthermore, the bearing structure is relatively stable and is not easily worn during the rotation of the transmission shaft 2, which can significantly improve the reliability of the test.

[0043] In some embodiments of this utility model, such as Figure 1 and Figure 2As shown, the shaft hole has a first end close to the generator 200 and a second end away from the generator 200, with a first bearing 31 close to the first end and a second bearing 32 close to the second end.

[0044] In other words, the first bearing 31, located near the first end of the generator 200, effectively withstands the axial and radial forces from the generator 200 side, ensuring the stability of the drive shaft 2 during high-speed rotation, reducing vibration caused by uneven force distribution, and thus improving the smoothness of generator 200 operation and reducing noise. The second bearing 32, located at the second end away from the generator 200, further supports the other end of the shaft and works in conjunction with the first bearing 31 to ensure that the drive shaft 2 does not shift during operation, maintaining better coaxiality between the drive shaft 2 and the shaft hole. This not only extends the service life of the shaft, shaft hole, and bearings but also improves the reliability of the entire system, ensuring long-term stable operation of the equipment.

[0045] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the first end has a first positioning step, and the test fixture 100 also includes: a first bearing end cover 41, the first bearing end cover 41 is installed on the first end, the surface of the first bearing end cover 41 facing the first bearing 31 has a first positioning protrusion, the first positioning protrusion extends into the shaft hole and cooperates with the first positioning step to restrict the position of the first bearing 31 along the axial direction.

[0046] In other words, the first positioning step and the first positioning protrusion on the first bearing end cover 41 cooperate to provide better axial positioning for the first bearing 31. The first positioning protrusion extends into the shaft hole and engages with the first positioning step, effectively preventing axial movement of the first bearing 31 during operation. This promotes stable operation of the first bearing 31 and reduces the risk of mechanical failure due to misalignment. Simultaneously, the first positioning step significantly reduces assembly difficulty, allowing the first bearing 31 to be installed more quickly in its predetermined position within the shaft hole, thus improving assembly efficiency. Furthermore, the stable positioning of the first bearing 31 reduces bearing wear, extends its service life, lowers equipment maintenance costs, and ensures long-term stable operation of the equipment.

[0047] In some embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 4 As shown, the first positioning protrusion includes a first positioning protrusion ring 411, which is constructed as an annulus surrounding the axis of the first bearing 31.

[0048] In other words, the annular design of the first positioning protrusion 411 can provide better uniform constraint on the first bearing 31, offering better positioning support in the circumferential direction. Compared to single-point or local positioning, it can better disperse the axial force of the first bearing 31, preventing tilting or displacement of the first bearing 31 due to uneven force during operation, thus significantly improving the axial positioning accuracy of the first bearing 31. Furthermore, the annular structure of the first positioning protrusion 411 facilitates the assembly of the first bearing end cover 41, meaning that the first positioning protrusion 411 and the first positioning step can be easily positioned against each other, improving the assembly efficiency of the first bearing end cover 41. Moreover, the annular design is beneficial for machining and manufacturing, reducing production costs, and ensuring the structural strength of the first positioning protrusion, guaranteeing its stable positioning function during long-term use.

[0049] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the second end has a second positioning step, and the test fixture 100 also includes: a second bearing end cover 42, which is installed on the second end. The surface of the second bearing end cover 42 facing the second bearing 32 has a second positioning protrusion. The second positioning protrusion extends into the shaft hole and cooperates with the second positioning step to restrict the position of the second bearing 32 along the axial direction.

[0050] In other words, the second positioning step and the second positioning protrusion on the second bearing end cover 42 cooperate to provide better axial positioning for the second bearing 32. The second positioning protrusion extends into the shaft hole and engages with the second positioning step, effectively preventing axial movement of the second bearing 32 during operation. This promotes stable operation of the second bearing 32 and reduces the risk of mechanical failure due to misalignment. Simultaneously, the second positioning step significantly reduces assembly difficulty, allowing the second bearing 32 to be installed more quickly in its predetermined position within the shaft hole, thus improving assembly efficiency. Furthermore, the more stable positioning of the second bearing 32 reduces bearing wear, extends its service life, lowers equipment maintenance costs, and ensures long-term stable operation of the equipment.

[0051] In some embodiments of the present invention, the second positioning protrusion includes a second positioning protrusion ring, which is constructed as an annulus surrounding the axis of the second bearing 32.

[0052] In other words, the annular design of the second positioning protrusion provides better uniform constraint on the second bearing 32, offering superior positioning support in the circumferential direction. Compared to single-point or localized positioning, it better disperses the axial force on the second bearing 32, preventing tilting or displacement due to uneven force during operation and significantly improving the axial positioning accuracy of the second bearing 32. Furthermore, the annular structure of the second positioning protrusion facilitates the assembly of the second bearing end cover 42, allowing for easier mutual positioning between the second positioning protrusion and the second positioning step, thus improving the assembly efficiency of the second bearing end cover 42. Moreover, the annular design is beneficial for machining and manufacturing, reducing production costs, and ensuring the structural strength of the second positioning protrusion, guaranteeing its stable positioning function during long-term use.

[0053] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the end of the drive shaft 2 facing the rotor assembly 30 has a positioning structure 21, which is used to position and cooperate with the rotor assembly 30.

[0054] In other words, the positioning structure 21 facilitates better docking between the drive shaft 2 and the rotor assembly 30, and helps maintain the coaxiality between the drive shaft 2 and the rotor assembly 30. When the drive shaft 2 and the rotor assembly 30 are running, it effectively reduces the vibration and noise caused by position deviation, improves the stability and smoothness of equipment operation, and can also improve the assembly efficiency between the drive shaft 2 and the rotor assembly 30.

[0055] For example, such as Figure 5 As shown, the drive shaft 2 includes a shaft segment 22 and a mating segment 23 connected in sequence along the axial direction. The diameter of the mating segment 23 is larger than the diameter of the shaft segment 22. The mating segment 23 is located at the end of the shaft segment 22 near the rotor assembly 30. A coaxial protrusion is provided on the end face of the mating segment 23 away from the shaft segment 22. The protrusion is constructed as a positioning structure 21. The rotor assembly 30 may include a rotor support. The rotor support is sleeved on the outer periphery of the protrusion, thereby making the drive shaft 2 and the rotor support have good coaxiality.

[0056] In some embodiments of this utility model, both the drive shaft 2 and the rotor assembly 30 are provided with opposing first fixing holes 51. The test fixture 100 also includes a first fixing member, which cooperates with the first fixing hole 51 to fix the drive shaft 2 and the rotor assembly 30.

[0057] For example, such as Figure 5As shown, the drive shaft 2 includes a shaft segment 22 and a mating segment 23 connected sequentially along the axial direction. The diameter of the mating segment 23 is larger than the diameter of the shaft segment 22. The mating segment 23 is located at the end of the shaft segment 22 near the rotor assembly 30. A coaxial protrusion is provided on the end face of the mating segment 23 away from the shaft segment 22. The protrusion is constructed as a positioning structure 21. The first fixing hole 51 can be a bolt hole. There are multiple bolt holes. The multiple bolt holes are evenly spaced around the axis of the drive shaft 2 and are provided in the mating segment 23. Similarly, the rotor support is also provided with a corresponding number of bolt holes. The rotor support and the drive shaft 2 can be fixedly connected by bolts mating with the bolt holes.

[0058] For example, the motor housing 10 includes a front housing and a rear housing. The rear housing is located on the side of the front housing away from the positioning plate 1. When fixing the rotor bracket and the drive shaft 2 with bolts, the rear housing can be disassembled first, and then connected to the front housing after the bolts are fixed. Furthermore, after the generator 200 and the test fixture 100 are assembled, the assembled generator 200 and the test fixture 100 can be installed as a whole on the test bench for testing.

[0059] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, both the positioning disk 1 and the motor housing 10 are provided with opposing second fixing holes 52. The test fixture 100 also includes a second fixing member, which cooperates with the second fixing hole 52 to fix the positioning disk 1 and the motor housing 10 together.

[0060] For example, the second fixing hole 52 can be a bolt hole. The combination of the bolt hole and the bolt (i.e., the second fixing component) is simple in structure and easy to operate, which can improve assembly efficiency. In addition, after the bolt is tightened, a large preload is generated, which tightly connects the positioning plate 1 to the motor housing 10. During the operation of the drive shaft 2 and the rotor assembly 30, it can effectively resist external forces caused by vibration, impact, etc., prevent relative displacement between the positioning plate 1 and the motor housing 10, and ensure the stability of the overall structure. Furthermore, the bolt connection facilitates disassembly and maintenance in the later stage, which can reduce the difficulty of maintenance.

[0061] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, both the positioning disk 1 and the motor housing 10 are provided with corresponding positioning holes 53. The test fixture 100 also includes a positioning pin, which cooperates with the positioning hole 53 to position the positioning disk 1 and the motor housing 10 to each other.

[0062] In other words, the cooperation between the positioning pin and the positioning hole 53 can better align the positioning plate 1 with the motor housing 10, shortening assembly time, improving assembly efficiency, and reducing repetitive operations caused by inaccurate positioning. After the positioning pin is inserted into the positioning hole 53, it can limit the relative displacement between the positioning plate 1 and the motor housing 10 in multiple directions, ensuring the stability of the overall structure.

[0063] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the positioning disk 1 includes a first disk body 11, a second disk body 12 and a connecting member 13. Along the axial direction, the connecting member 13 is connected between the first disk body 11 and the second disk body 12. The first disk body 11 is fixedly connected to the motor housing 10, and the second disk body 12 is fixedly connected to the testing device.

[0064] In other words, the first disc 11 is securely connected to the motor housing 10, and the second disc 12 is securely connected to the testing device, which can effectively improve the stability of the connection between the motor and the testing device and ensure the stability of force transmission during the test. During assembly, the first disc 11 can be fixed to the motor housing 10 and the second disc 12 can be fixed to the testing device respectively, which can reduce the installation difficulty and improve the installation efficiency.

[0065] In a specific example of this application, combined with Figures 1-5 The first bearing 31 and the second bearing 32 are both mounted on the drive shaft 2 by an interference fit. The first bearing 31 and the second bearing 32 are both mounted in the shaft hole of the positioning plate 1 by an transition fit. The first bearing end cover 41 and the second bearing end cover 42 are respectively mounted on the positioning plate 1 by bolts.

[0066] The test fixture 100, test device, and other components and operations of the generator 200 according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0067] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A test fixture (100) for a generator (200), characterized in that, The generator (200) includes a motor housing (10) and a stator assembly (20) and a rotor assembly (30) installed within the motor housing (10). The test fixture (100) includes: Positioning disk (1), the positioning disk (1) is fixedly connected to the motor housing (10), and the positioning disk (1) has a shaft hole; A drive shaft (2) is inserted into the shaft hole, and the end of the drive shaft (2) is coaxially connected to the rotor assembly (30). The bearing is located between the positioning disk (1) and the drive shaft (2), and the bearing includes a first bearing (31) and a second bearing (32), which are spaced apart along the axial direction of the drive shaft (2).

2. The test fixture (100) according to claim 1, characterized in that, The shaft hole has a first end near the generator (200) and a second end away from the generator (200), with the first bearing (31) near the first end and the second bearing (32) near the second end.

3. The test fixture (100) according to claim 2, characterized in that, The first end has a first positioning step, and the test fixture (100) further includes: a first bearing end cover (41), the first bearing end cover (41) is installed on the first end, the surface of the first bearing end cover (41) facing the first bearing (31) has a first positioning protrusion, the first positioning protrusion extends into the shaft hole and cooperates with the first positioning step to restrict the position of the first bearing (31) axially upward.

4. The test fixture (100) according to claim 3, characterized in that, The first positioning protrusion includes a first positioning protrusion ring (411), which is configured as an annulus surrounding the axis of the first bearing (31).

5. The test fixture (100) according to claim 2, characterized in that, The second end has a second positioning step, and the test fixture (100) further includes: a second bearing end cover (42), the second bearing end cover (42) is installed on the second end, the surface of the second bearing end cover (42) facing the second bearing (32) has a second positioning protrusion, the second positioning protrusion extends into the shaft hole and cooperates with the second positioning step to restrict the position of the second bearing (32) axially upward.

6. The test fixture (100) according to claim 5, characterized in that, The second positioning protrusion includes a second positioning protrusion ring, which is configured as an annulus surrounding the axis of the second bearing (32).

7. The test fixture (100) according to claim 1, characterized in that, The drive shaft (2) has a positioning structure (21) at one end facing the rotor assembly (30), the positioning structure (21) being used for positioning and cooperating with the rotor assembly (30).

8. The test fixture (100) according to claim 1, characterized in that, Both the drive shaft (2) and the rotor assembly (30) are provided with opposing first fixing holes (51). The test fixture (100) also includes a first fixing member, which cooperates with the first fixing hole (51) to fix the drive shaft (2) and the rotor assembly (30) in place.

9. The test fixture (100) according to claim 1, characterized in that, Both the positioning disk (1) and the motor housing (10) are provided with opposing second fixing holes (52). The test fixture (100) also includes a second fixing member, which cooperates with the second fixing hole (52) to fix the positioning disk (1) and the motor housing (10) together.

10. The test fixture (100) according to claim 1, characterized in that, The positioning disk (1) and the motor housing (10) are both provided with corresponding positioning holes (53). The test fixture (100) also includes a positioning pin, which cooperates with the positioning hole (53) to position the positioning disk (1) and the motor housing (10) to each other.

11. The test fixture (100) according to claim 1, characterized in that, The positioning disk (1) includes a first disk body (11), a second disk body (12) and a connector (13). Along the axial direction, the connector (13) is connected between the first disk body (11) and the second disk body (12). The first disk body (11) is fixedly connected to the motor housing (10), and the second disk body (12) is fixedly connected to the testing device.

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