Torque testing tool and manufacturing method thereof

Abstract

The invention provides a torque test tool, which comprises a support, the support comprises a first assembly group, the first assembly group comprises a first bearing and a first inner ring limiting part, the first inner ring limiting part is connected with a bearing inner ring of the first bearing, the support further comprises a second bearing and a connecting shaft, the first inner ring limiting part is connected with the first bearing and the connecting shaft, and the second inner ring limiting part is connected with the connecting shaft. The first inner ring limiting part is located between the first bearing and the connecting shaft, and the first inner ring limiting part is detachably connected with the connecting shaft, so that the first inner ring limiting part can isolate the first bearing from the connecting shaft, and the first inner ring limiting part and the first bearing can be disassembled together; therefore, the damage / loss of the connecting shaft to the first bearing can be reduced, and the repeated utilization rate of the first bearing is improved; the invention further provides a manufacturing method of the torque testing tool.

Description

Technical Field

[0001] This application belongs to the field of motor performance testing of robot actuators, specifically relating to a torque testing fixture and its manufacturing method. Background Technology

[0002] In the manufacturing process of actuators or motors, in order to ensure the performance of the actuators or motors, performance testing is carried out on the manufactured actuators or motors. Taking torque testing as an example, in the torque testing equipment of related technologies, a bearing and components for limiting the bearing are designed at the end of the motor near the testing part. The bearing is usually tightly fitted / interference-fitted with the output shaft of the motor. This will cause the shaft to be easily damaged / worn out during the disassembly and replacement of the motor stator and rotor, making it unusable. Summary of the Invention

[0003] The technical problem to be solved by this application is to improve the reusability of bearings in torque testing fixtures.

[0004] To solve the above-mentioned technical problems, this application provides a torque testing fixture, including a torque detection component and a support capable of installing the element to be tested. The support includes a first assembly group, which includes a first bearing, a first inner ring limiting part, and a first outer ring limiting part. The first inner ring limiting part is connected to the inner ring of the first bearing, and the first outer ring limiting part is connected to the outer ring of the first bearing.

[0005] The support also includes a second bearing and a connecting shaft. The first bearing is located on the side of the second bearing near the torque detection component. The inner ring of the second bearing is connected to the connecting shaft. The first inner ring limiting part is located between the first bearing and the connecting shaft. The first inner ring limiting part connects the first bearing and the connecting shaft, and the first inner ring limiting part is detachably connected to the connecting shaft.

[0006] The torque testing fixture provided in this application includes a support, which includes a first assembly group. The first assembly group includes a first bearing and a first inner ring limiting part. The first inner ring limiting part is connected to the inner ring of the first bearing. The support also includes a second bearing and a coupling. The first inner ring limiting part connects the first bearing and the coupling, and is located between the first bearing and the coupling. The first inner ring limiting part and the coupling are detachably connected, so that the first inner ring limiting part can isolate the first bearing and the coupling, and the first inner ring limiting part can be disassembled together with the first bearing, thereby reducing the damage / wear of the coupling to the first bearing and improving the reusability of the first bearing.

[0007] This application also provides a method for manufacturing a torque testing fixture. The torque testing fixture includes a support and a torque detection component. A first bearing of the support is located on the side of the connecting shaft of the support near the torque detection component. The connecting flange of the support is interference-fitted with the inner ring of the first bearing. The connecting flange is fitted onto the connecting shaft. The connecting shaft and the connecting flange are locked together by a first screw.

[0008] The manufacturing method of the torque testing fixture provided in this application provides a torque testing fixture, which includes a support. The connecting flange of the support is interference-fitted with the inner ring of the first bearing. The connecting flange is sleeved with a connecting shaft. The connecting shaft and the connecting flange are locked together by a first screw, so that the connecting flange can isolate the first bearing from the connecting shaft. Furthermore, the connecting flange can be disassembled together with the first bearing by means of the first screw, thereby reducing damage / wear to the first bearing and improving the reusability of the first bearing. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a three-dimensional structural diagram of the fixing device in a manufacturing method of a torque testing fixture provided in an embodiment of this application;

[0011] Figure 2 for Figure 1 A top-down view;

[0012] Figure 3 for Figure 2 Schematic diagram of the cross-sectional plane of section S;

[0013] Figure 4 for Figure 1 An explosion diagram;

[0014] Figure 5 For configuration Figure 1 A three-dimensional structural schematic diagram of the torque testing fixture for the fixed device shown.

[0015] Figure 6 for Figure 3 An enlarged schematic diagram of G in the diagram.

[0016] In the diagram: 10-First pre-assembly; 11-Support base; 111-First outer ring limiting step; 112-Cylinder section; 1121-First part; 1122-Second part; 1120-Cylinder cavity; 113-Plate section; 12-Connecting flange; 121-First inner ring limiting step; 120-Allowing hole; 13-First washer; 21-First screw; 22-Second screw; 23-Third screw; 24-Fourth screw; 25-Fifth screw; 30-Second pre-assembly; A-Support; A1-First assembly group; A11-First bearing; A111-First wall surface; A112 - Second wall surface; A12 - First inner ring limiting part; A13 - First outer ring limiting part; A21 - Second bearing; A22 - Coupling; A221 - First protrusion; A222 - Second protrusion; A223 - Assembly part; A224 - Second inner ring limiting step; A225 - Third protrusion; A23 - Cover plate; A231 - Second outer ring limiting step; A24 - Second washer; A25 - Bushing; A3 - Hanger; B - Torque detection component; C - Motor; C1 - Housing; C11 - First step; C12 - Second step; C2 - Rotor. Detailed Implementation

[0017] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements.

[0018] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0019] It should be understood that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one; "multiple" indicates two or more. Unless otherwise stated, terms such as "front," "rear," "lower," and / or "upper" are for illustrative purposes only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects.

[0020] The exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementation methods can complement or combine with each other.

[0021] The torque testing fixture of this application includes a torque detection component B and a support A capable of mounting the component to be tested. The support A includes a first assembly group A1, which includes a first bearing A11, a first inner ring limiting part A12, and a first outer ring limiting part A13. The first inner ring limiting part A12 is connected to the inner ring of the first bearing A11, and the first outer ring limiting part A13 is connected to the outer ring of the first bearing A11.

[0022] The support A also includes a second bearing A21 and a connecting shaft A22. The first bearing A11 is located on the side of the second bearing A21 closer to the torque detection component B. The inner ring of the second bearing A21 is connected to the connecting shaft A22. The first inner ring limiting part A12 is located between the first bearing A11 and the connecting shaft A22. The first inner ring limiting part A12 connects the first bearing A11 and the connecting shaft A22, and the first inner ring limiting part A12 and the connecting shaft A22 are detachably connected.

[0023] The torque testing fixture provided in this application includes a support A, which includes a first assembly group A1. The first assembly group A1 includes a first bearing A11 and a first inner ring limiting part A12. The first inner ring limiting part A12 is connected to the inner ring of the first bearing A11. The support A also includes a second bearing A21 and a connecting shaft A22. The first inner ring limiting part A12 connects the first bearing A11 and the connecting shaft A22, and is located between the first bearing A12 and the connecting shaft A22. The first inner ring limiting part A12 and the connecting shaft A22 are detachably connected, so that the first inner ring limiting part A12 can isolate the first bearing A11 and the connecting shaft A22, and the first inner ring limiting part A12 can be disassembled together with the first bearing A11, thereby reducing the damage / wear of the connecting shaft A22 to the first bearing A11 and improving the reusability of the first bearing A11.

[0024] According to a specific embodiment of this application, please refer to Figures 1 to 6 A torque testing fixture includes a support A capable of mounting the component to be tested. In other words, the component to be tested is limited and fixed by the support A, that is, the component to be tested is limited and fixed in the support A of the torque testing fixture.

[0025] Support A includes a first assembly group A1, which includes a first bearing A11, a first inner ring limiting part A12, and a first outer ring limiting part A13. The first inner ring limiting part A12 is connected to the inner ring of the first bearing A11, and the first outer ring limiting part A13 is connected to the outer ring of the first bearing A11.

[0026] It should be noted that the connection between the first inner ring limiting part A12 and the bearing inner ring of the first bearing A11 includes a direct contact connection or a non-contact connection fixed by an intermediate adhesive layer. Similarly, the connection between the first outer ring limiting part A13 and the bearing outer ring of the first bearing A11 includes a direct contact connection or a non-contact connection fixed by an intermediate adhesive layer. The connection method between the first inner ring limiting part A12 and the bearing inner ring of the first bearing A11 and the connection method between the first outer ring limiting part A13 and the bearing outer ring of the first bearing A11 may be the same or different.

[0027] The torque testing fixture also includes a torque detection component B, and the support A also includes a second bearing A21 and a connecting shaft A22. The first bearing A11 is located on the side of the second bearing A21 closer to the torque detection component B; in other words, the second bearing A21 is farther away from the torque detection component B than the first bearing A11.

[0028] The inner ring of the second bearing A21 is connected to the connecting shaft A22. This connection includes direct contact or a non-contact connection secured by an intermediate adhesive layer. This embodiment describes the connection as follows: the inner ring of the second bearing A21 is directly connected to the connecting shaft A22; the first inner ring limiting part A12 is directly connected to the inner ring of the first bearing A11; and the first inner ring limiting part A12 is directly connected to the inner ring of the first bearing A11. Figure 3 As shown.

[0029] In this embodiment, as Figure 3 As shown, the first inner ring limiting part A12 is located between the first bearing A11 and the connecting shaft A22. The first inner ring limiting part A12 connects the first bearing A11 and the connecting shaft A22 to achieve the effect of isolating the first bearing A11 and the connecting shaft A22. The first inner ring limiting part A12 and the connecting shaft A22 are detachably connected. Through the detachability of the first inner ring limiting part A12 and the connecting shaft A22, the whole formed by the first inner ring limiting part A12 and the first bearing A11 can be separated from the connecting shaft A22. This reduces the damage / wear of the first bearing A11 by the connecting shaft A22 during the disassembly process. The whole formed by the first inner ring limiting part A12 and the first bearing A11 can be reused, thereby improving the reusability of the first bearing A11.

[0030] Specifically, such as Figure 3 and Figure 6As shown, the first assembly A1 includes a support base 11, a connecting flange 12, and a first washer 13. A first bearing A11 is located between the support base 11 and the connecting flange 12, and connects the support base 11 and the connecting flange 12. Both the support base 11 and the first washer 13 are connected to the outer ring of the first bearing A11 for positioning. The connecting flange 12 is interference-fitted with the inner ring of the first bearing A11. The connecting flange 12 is connected to the coupling A22 via a first screw 21. By removing the screw, the assembly consisting of the connecting flange 12 and the first bearing A11 can be separated from the coupling A22, reducing damage / wear to the first bearing A11 during disassembly. The assembly formed by the first inner ring positioning part A12 and the first bearing A11 can be reused, thereby improving the reusability of the first bearing A11.

[0031] It should be noted that both the support seat 11 and the first washer 13 are connected to the outer ring of the first bearing A11 for limiting. This means that the support seat 11 has a limiting effect on the outer ring of the first bearing A11, and at the same time, the first washer 13 has a limiting effect on the outer ring of the first bearing A11. The support seat 11 combined with the first washer 13 can restrict the movement of the first bearing A11 along its axial direction.

[0032] In this embodiment, the bearing end face of the first bearing A11 away from the second bearing A21 is defined as the first wall surface A111, and the bearing end face of the first bearing A11 close to the second bearing A21 is defined as the second wall surface A112. Figure 6 As shown;

[0033] like Figure 6 As shown, the connecting flange 12 includes a first inner ring limiting step 121, the support base 11 includes a first outer ring limiting step 111, the first outer ring limiting step 111 abuts against the first wall surface A111, the first inner ring limiting step 121 abuts against the second wall surface A112, the first washer 13 abuts against the second wall surface A112, and the first washer 13 is connected to the support base 11 by a second screw 22.

[0034] In this embodiment, the first assembly group A1 can form a pre-assembled body. In other words, the whole formed by the first bearing A11, the support seat 11, the connecting flange 12 and the first gasket 13 is a pre-assembled body. Here, the pre-assembled body means that the first assembly group A1 can complete the assembly in advance without relying on other parts of the torque testing fixture or the element to be tested. That is, the first assembly group A1 can complete its overall assembly independently, without being restricted by the installation sequence of other parts of the torque testing fixture or the element to be tested.

[0035] The assembly of the first assembly group A1 / pre-assembly can be completed in advance, detached from other parts of the component to be tested / torque test fixture. The assembly process and assembly time of the first assembly group A1 / pre-assembly are easier to control.

[0036] The torque testing fixture of this embodiment can save assembly time for the first bearing A11, support seat 11, connecting flange 12 and first washer 13, thereby improving the assembly efficiency of the torque testing fixture.

[0037] Furthermore, the first bearing A11, support seat 11, connecting flange 12, and first gasket 13 form a pre-assembled whole. After the initial assembly process is completed, the first assembly group A1 / pre-assembled whole does not need to be disassembled in subsequent tooling. In other words, the first assembly group A1 / pre-assembled whole formed by the first bearing A11, support seat 11, connecting flange 12, and first gasket 13 of the fixture A in this embodiment can achieve the effect of repeated use after one assembly, which greatly saves the time cost of subsequent torque testing.

[0038] In this embodiment, as Figure 3 As shown, the support A also includes a cover plate A23, a second washer A24 and a bushing A25. The outer ring of the second bearing A21 is connected to the cover plate A23, the second washer A24 is connected to the outer ring of the second bearing A21, the inner ring of the second bearing A21 is interference-fitted with the connecting shaft A22, and the bushing A25 is connected to the inner ring of the second bearing A21.

[0039] like Figure 3 As shown, the inner ring of the second bearing A21 is connected to the connecting shaft A22. The second bearing A21 connects the connecting shaft A22 and the cover plate A23. The cover plate A23, together with the second washer A24, limits the movement of the second bearing A21 along its axial direction. The bushing A25 is connected to the connecting shaft A22 by a thread.

[0040] The coupling A22 includes a first protrusion A221 and a second protrusion A222. The outer diameter of the first protrusion A221 is smaller than the outer diameter of the second protrusion A222. The connecting flange 12 is sleeved on the first protrusion A221, and the end face of the connecting flange 12 abuts against the second protrusion A222. The first screw 21 connects the connecting flange 12 and the second protrusion A222.

[0041] Furthermore, the second inner ring limiting step 224 of the connecting shaft A22 is connected to the bearing inner ring of the second bearing A21, and the second inner ring limiting step 224, together with the bushing A25, limits the movement of the second bearing A21 along its axial direction.

[0042] The second bearing A21, cover plate A23, connecting shaft A22, second washer A24, and bushing A25 can form a second assembly group. The second assembly group is a pre-assembled body. Here, "pre-assembled body" means that the second assembly group can be pre-assembled without relying on other parts of the torque testing fixture or the element to be tested. That is, the second assembly group can independently complete its overall assembly without being restricted by the installation sequence of other parts of the torque testing fixture or the element to be tested.

[0043] The assembly of the second assembly group / pre-assembly can be completed in advance, detached from other parts of the component to be tested / torque test fixture. The second assembly group is then assembled with other parts of the component to be tested or torque test fixture. The assembly process and assembly time of the second assembly group / pre-assembly are easier to control.

[0044] The torque testing fixture applied in this embodiment can save assembly time for the second bearing A21, cover plate A23, connecting shaft A22, second washer A24 and bushing A25, thereby improving the assembly efficiency of the torque testing fixture.

[0045] Furthermore, the second bearing A21, cover plate A23, connecting shaft A22, second washer A24, and bushing A25 form the second assembly group as a whole. After the initial assembly process is completed, the second assembly group / pre-assembly does not need to be disassembled in subsequent tooling. In other words, the second assembly group / pre-assembly formed by the second bearing A21, cover plate A23, connecting shaft A22, second washer A24, and bushing A25 of the fixture A in this embodiment can achieve the effect of repeated use after one assembly, which greatly saves the time cost of subsequent torque testing.

[0046] In this embodiment, the support base 11 includes a cylindrical portion 112 and a plate portion 113. The plate portion 113 is located at the end of the cylindrical portion 112 away from the torque detection unit B. The cylindrical portion 112 and the plate portion 113 are integrally formed structures.

[0047] Along the axial direction of the connecting shaft A22, the first bearing A11 and the second bearing A21 are located at both ends of the component to be tested, thereby reducing the degree of skewness of the component to be tested during installation and improving the testing accuracy.

[0048] The coupling A22 includes an assembly part A223, which is closer to the first bearing A11 than the second bearing A21. That is, the assembly part A223 is located on the side of the coupling A22 closer to the first bearing A11 and farther away from the second bearing A21. The assembly part A223 extends out of the cylindrical part 112 and can be connected to the detection component B. In other words, the detection component B realizes the torque detection of the component to be detected by connecting the coupling A22 to the assembly part A223.

[0049] like Figure 5As shown, the support A includes a bracket A3. The end of the cylindrical part 112 away from the plate part 113 is detachably connected to the bracket A3. In this embodiment, the cylindrical part 112 and the bracket A3 are detachably connected by screws.

[0050] The first bearing A11 and the connecting flange 12 are at least partially located in the cylindrical cavity 1120 of the cylindrical portion 112, such as Figure 3 As shown, this allows for a more compact structure in the first assembly group A1.

[0051] like Figure 3 As shown, the cylindrical portion 112 includes a first portion 1121 and a second portion 1122. The first portion 1121 is located on the side of the second portion 1122 away from the plate portion 113. The inner diameter of the first portion 1121 is smaller than the inner diameter of the second portion 1122. The first portion 1121 is detachably connected to the bracket A3 by a third screw 23.

[0052] The connecting flange 12 has a clearance hole 120 for mounting the first screw 21. The inner diameter of the first part 1121 is smaller than the diameter of the clearance hole 120 to facilitate the installation or removal of the first screw 21.

[0053] The component to be tested in this embodiment is a motor C, specifically a frameless motor. The cogging torque of the motor C can be measured using the torque testing fixture described above.

[0054] During the assembly of motor C and torque testing fixture, support base 11 and cover plate A23 are respectively positioned on the housing C1 of motor C, so that the rotor C2 of motor C and housing C1 can have a good coaxiality during the installation process, and the damage to rotor C2 caused during the assembly process can also be reduced.

[0055] Connecting shaft A22 is a hollow shaft, such as Figure 3 As shown, this is beneficial for weight reduction and cost reduction.

[0056] This application also provides a method for manufacturing a torque testing fixture. The torque testing fixture includes a support A and a torque detection component B. The first bearing A11 of the support A is located on the side of the connecting shaft A22 of the support A near the torque detection component B. The connecting flange 12 of the support A is interference-fitted with the inner ring of the first bearing A11, and the connecting flange 12 is fitted onto the connecting shaft 22. The connecting shaft A22 and the connecting flange 12 are locked together by a first screw 21.

[0057] The manufacturing method of the torque testing fixture provided in this application provides a torque testing fixture, which includes a support A. The connecting flange 12 of the support A is interference-fitted with the inner ring of the first bearing A11. The connecting flange 12 is sleeved with the connecting shaft A22. The connecting shaft A22 and the connecting flange 12 are locked together by a first screw 21, so that the connecting flange 12 can isolate the first bearing A11 from the connecting shaft A22. The first screw 21 also allows the connecting flange 12 to be disassembled together with the first bearing A11, thereby reducing damage / wear to the first bearing A11 and improving the reusability of the first bearing A11.

[0058] According to a specific embodiment of this application, a method for manufacturing a torque testing fixture is provided. The torque testing fixture includes a support A, which includes a first bearing A11, a support seat 11, a connecting flange 12, and a first washer 13. The first bearing A11 is located between the support seat 11 and the connecting flange 12, and the first bearing A11 connects the support seat 11 and the connecting flange 12.

[0059] After the outer ring of the first bearing A11 is positioned and engaged with the first outer ring limiting step 113 of the support seat 11, the first washer 13 is connected and fixed to the support seat 11 and the first washer 13 is positioned and engaged with the outer ring of the first bearing A11. After the first inner ring limiting step 121 of the connecting flange 12 is positioned and engaged with the inner ring of the first bearing A11, the first pre-assembly 10 is formed. That is, the first bearing A11, the support seat 11, the connecting flange 12 and the first washer 13 are connected and engaged to form the first pre-assembly 10.

[0060] The assembly of the first pre-assembly 10 can be completed in advance, detached from other parts of the component to be tested / torque test fixture. The first pre-assembly 10 as a whole is then assembled with other parts of the component to be tested or torque test fixture. The assembly process and assembly time of the first pre-assembly 10 are easier to control, and the assembly efficiency is higher.

[0061] During the assembly of the first pre-assembled body 10, the outer ring of the first bearing A11 is first assembled with the support seat 11. The assembly of the outer ring of the first bearing A11 with the support seat 11 is a loose fit / clearance fit, which facilitates the installation of the first bearing A11. After the support seat 11 and the first washer 13 are used to axially limit the first bearing A11, the first bearing A11 is then assembled with the connecting flange 12. The assembly of the first bearing A11 with the connecting flange 12 is a tight fit / interference fit.

[0062] The first pre-assembly 10, after the above assembly process, has better overall stability, which is beneficial to improving the detection accuracy of the first pre-assembly 10 in the torque detection process of the torque testing fixture.

[0063] Support A also includes a second bearing A21, a cover plate A23, a second washer A24 and a bushing A25. The second bearing A21 is located between the cover plate A23 and the connecting shaft A22, and the second bearing A21 connects the cover plate A23 and the connecting shaft A22.

[0064] After the outer ring of the second bearing A21 is positioned and engaged with the second outer ring limiting step A231 of the cover plate A23, the second washer A24 is connected and fixed to the cover plate A23 and is positioned and engaged with the outer ring of the second bearing A21. After the second inner ring limiting step A224 of the connecting shaft A22 is positioned and engaged with the inner ring of the second bearing A21, the bushing A25 is fitted onto the connecting shaft A22 and is positioned and engaged with the inner ring of the second bearing A21. The second bearing A21, the cover plate A23, the connecting shaft A22, the second washer A24, and the bushing A25 form the second pre-assembly 30. That is, the second bearing A21, the cover plate A23, the connecting shaft A22, the second washer A24, and the bushing A25 are connected and engaged to form the second pre-assembly 30.

[0065] The assembly of the second pre-assembly 30 can be completed in advance, detached from other parts of the component to be tested / torque test fixture. The second pre-assembly 30 as a whole is then assembled with other parts of the component to be tested or torque test fixture. The assembly process and assembly time of the second pre-assembly 30 are easier to control, and the assembly efficiency is higher.

[0066] In this embodiment, after the connecting flange 12 of the support A is interference-fitted with the inner ring of the first bearing A11, the first pre-assembly 10 is formed. The connecting flange 12 is then fitted onto the connecting shaft 22, that is, the first pre-assembly 10 is fitted onto the connecting shaft 22. Then, the first screw 21 connecting the connecting shaft A22 and the connecting flange 12 is tightened to complete the assembly of the first bearing A11 / first pre-assembly 10 and the connecting shaft A22. Alternatively, when it is necessary to remove the first bearing A11 / first pre-assembly 10 from the connecting shaft A22, the first screw 21 can be operated to separate the first bearing A11 / first pre-assembly 10 from the connecting shaft A22. The operation is simple and quick. Moreover, when disassembling or assembling the first bearing A11 / first pre-assembly 10, the first bearing A11 and the connecting shaft A22 do not have direct contact, thereby reducing the damage / wear of the first bearing A11 by the connecting shaft A22 and improving the reusability of the first bearing A11.

[0067] The torque testing fixture is used to measure the cogging torque of motor C. Before the rotor C2 of motor C is installed into the housing C1 of motor C, the rotor C2 is engaged with the coupling A22.

[0068] like Figure 3As shown, the axial direction of the rotor C2 of motor C is limited to the third protrusion A225 of the connecting shaft A22. Before the rotor C2 of motor C is installed into the housing C1 of motor C, the stator C3 of motor C is assembled with the housing C1.

[0069] The first pre-assembly 10 and the second pre-assembly 30 approach the housing C1 from both ends of the housing C1 along the axial direction. The first step C11, which is located on the housing C1, has a limiting effect on the support seat 11 of the first pre-assembly 10 along the motor C-axis. The first step C11 of the housing C1 also has a limiting effect on the cover plate A23 of the second pre-assembly 30 along the motor C-axis. Both the first pre-assembly 10 and the second pre-assembly 30 are limited by the housing C1, and the coaxiality of the first pre-assembly 10 and the second pre-assembly 30 is good.

[0070] After the entire first pre-assembly 10 is connected to the housing C1 by the fourth screw 24, the entire second pre-assembly 30 is connected to the housing C1 by the fifth screw 25, and the entire second pre-assembly 30 is assembled with the entire first pre-assembly 10.

[0071] Alternatively, after the entire assembly forming the second pre-assembly 30 is connected to the housing C1 by the fifth screw 25, the entire assembly forming the first pre-assembly 10 is connected to the housing C1 by the fourth screw 24, and the entire assembly forming the second pre-assembly 30 is assembled with the entire assembly forming the first pre-assembly 10.

[0072] The fifth screw 25 passes through the outer peripheral wall of the housing C1 and is connected to the cover plate A23 to facilitate the rotation of the fifth screw 25.

[0073] Some technical features of some implementation methods in the above embodiments can be combined or replaced.

[0074] The technical principles of this application have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, other technical solutions or equivalent substitutions of this application that can be conceived by those skilled in the art without creative effort will fall within the scope of protection of this application.

Claims

1. A torque testing fixture, characterized in that: The device includes a torque detection component and a support for mounting the element to be detected. The support includes a first assembly group, which includes a first bearing, a first inner ring limiting part, and a first outer ring limiting part. The first inner ring limiting part is connected to the inner ring of the first bearing, and the first outer ring limiting part is connected to the outer ring of the first bearing. The support also includes a second bearing and a connecting shaft. The first bearing is located on the side of the second bearing near the torque detection component. The inner ring of the second bearing is connected to the connecting shaft. The first inner ring limiting part is located between the first bearing and the connecting shaft. The first inner ring limiting part connects the first bearing and the connecting shaft, and the first inner ring limiting part is detachably connected to the connecting shaft.

2. The torque testing fixture according to claim 1, characterized in that: The first assembly includes a support base, a connecting flange, and a first washer. The first bearing is located between the support base and the connecting flange, and the first bearing connects the support base and the connecting flange. The support base and the first washer are both limited to the outer ring of the first bearing. The connecting flange is interference-fitted with the inner ring of the first bearing. The connecting flange is connected to the coupling shaft by a first screw.

3. The torque testing fixture according to claim 2, characterized in that: The bearing end face of the first bearing that is far from the second bearing is defined as the first wall face, and the bearing end face of the first bearing that is close to the second bearing is defined as the second wall face; The connecting flange includes a first inner ring limiting step, and the support base includes a first outer ring limiting step. The first outer ring limiting step abuts against the first wall surface, the first inner ring limiting step abuts against the second wall surface, the first washer abuts against the second wall surface, and the first washer is connected to the support base by a second screw.

4. The torque testing fixture according to claim 2 or 3, characterized in that: The support base includes a cylindrical portion and a plate portion, the plate portion being located at the end of the cylindrical portion away from the torque detection portion, and the cylindrical portion and the plate portion being an integrally formed structure; The support includes a bracket, and one end of the cylindrical portion away from the plate portion is detachably connected to the bracket. The first bearing and the connecting flange are at least partially located in the cylindrical cavity of the cylindrical portion. The first assembly group can form a pre-assembled body.

5. The torque testing fixture according to claim 2 or 3, characterized in that: The support also includes a cover plate, a second washer, and a bushing. The outer ring of the second bearing is connected to the cover plate, the second washer is connected to the outer ring of the second bearing, the inner ring of the second bearing is interference-fitted with the connecting shaft, and the bushing is connected to the inner ring of the second bearing. The second bearing, the cover plate, the connecting shaft, the second washer, and the bushing can form a pre-assembled body. The coupling includes a first protrusion and a second protrusion. The outer diameter of the first protrusion is smaller than the outer diameter of the second protrusion. The connecting flange is sleeved on the first protrusion, and the end face of the connecting flange abuts against the second protrusion. The first screw connects the connecting flange and the second protrusion.

6. The torque testing fixture according to claim 4, characterized in that: Along the axial direction of the connecting shaft, the first bearing and the second bearing are respectively located at both ends of the element to be tested; The coupling includes an assembly portion that is closer to the first bearing than the second bearing, the assembly portion extends out of the cylindrical portion, and the assembly portion can be connected to the detection component; The cylindrical portion is defined as including a first portion and a second portion. The first portion is located on the side of the second portion away from the plate portion. The inner diameter of the first portion is smaller than the inner diameter of the second portion. The first portion is detachably connected to the bracket by a third screw. The connecting flange has a clearance hole for mounting the first screw, and the inner diameter of the first part is smaller than the diameter of the clearance hole.

7. A method for manufacturing a torque testing fixture, characterized in that: A torque testing fixture is provided, comprising a support and a torque detection component. The first bearing of the support is located on the side of the connecting shaft of the support near the torque detection component. The connecting flange of the support is interference-fitted with the inner ring of the first bearing, and the connecting flange is fitted onto the connecting shaft. The connecting shaft and the connecting flange are locked together by a first screw.

8. The manufacturing method of the torque testing fixture according to claim 7, characterized in that: The support also includes a support base, a connecting flange, and a first gasket. The first bearing is located between the support base and the connecting flange, and the first bearing connects the support base and the connecting flange. After the outer ring of the first bearing is matched with the first outer ring limiting step of the support seat, the first washer is connected and fixed to the support seat and the first washer is matched with the outer ring of the first bearing. After the first inner ring limiting step of the connecting flange is matched with the inner ring of the first bearing, a first pre-assembled body is formed.

9. The method for manufacturing the torque testing fixture according to claim 7 or 8, characterized in that: The support also includes a second bearing, a cover plate, a second washer, and a bushing. The second bearing is located between the cover plate and the connecting shaft, and the second bearing connects the cover plate and the connecting shaft. After the outer ring of the second bearing is positioned and engaged with the second outer ring limiting step of the cover plate, the second washer is connected and fixed to the cover plate and the second washer is positioned and engaged with the outer ring of the second bearing. After the second inner ring limiting step of the connecting shaft is positioned and engaged with the inner ring of the second bearing, the bushing is fitted onto the connecting shaft and the bushing is positioned and engaged with the inner ring of the second bearing. The second bearing, the cover plate, the connecting shaft, the second washer, and the bushing form a second pre-assembled body.

10. The manufacturing method of the torque testing fixture according to claim 9, characterized in that: The torque testing fixture is used to measure the cogging torque of the motor. Before the rotor of the motor is installed into the motor housing, the rotor is engaged with the coupling shaft. After the entire assembly forming the first pre-assembly is connected to the housing by the fourth screw, the entire assembly forming the second pre-assembly is connected to the housing by the fifth screw, and the entire assembly forming the second pre-assembly is assembled with the entire assembly forming the first pre-assembly. Alternatively, after the entire assembly forming the second pre-assembly is connected to the housing by the fifth screw, the entire assembly forming the first pre-assembly is connected to the housing by the fourth screw, and the entire assembly forming the second pre-assembly is assembled with the entire assembly forming the first pre-assembly.

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