Stator assembly and electric machine having the same

Abstract

The application discloses a stator assembly and a motor with the same. The stator assembly comprises a stator body, a first bearing support arranged on one end of the stator body and formed with a first bearing mounting position, and a second bearing support arranged on the other end of the stator body and formed with a second bearing mounting position. When a rear bearing is mounted on the second bearing support through the second bearing mounting position, an installation gap is left between the rear bearing and the second bearing support, which serves as a mounting position of a wave-shaped gasket. The structure of the application changes the mounting position of the wave-shaped gasket on the motor, effectively reduces the parts affecting the precision of the distance between the shaft extension end face and the flange end face of the motor, reduces the tolerance accumulation and assembly error of the parts, and further improves the precision of the distance between the shaft extension end face and the flange end face of the motor, and facilitates the assembly of the motor.

Description

Technical Field

[0001] This application relates to the field of motor technology, and more specifically, to a stator assembly and a motor having the stator assembly. Background Technology

[0002] Servo motors are one of the key products in the motor industry, widely used in robots, CNC machine tools, and other equipment. (See also: [link to relevant documentation]). Figures 1 to 3 , Figures 1 to 3 The diagram illustrates the structure of a servo motor and stator in the prior art. In robot applications, due to the special installation characteristics of servo motors, the distance between the shaft extension end face and the flange end face of the servo motor is often ( Figure 2 The spacing (represented by A in the diagram) has high requirements to ensure the assembly accuracy of robot-related components.

[0003] like Figures 1 to 3 As shown, the existing servo motor structure mainly includes components such as housing 14, stator body 11, front cover 15, rear cover 16, wave gasket 20, and rotor 19. Among them, the front bearing 17 and rear bearing 18 of the rotor 19 of the existing servo motor are respectively fitted with bearing chambers formed on the front cover 15 and rear cover 16. The front cover 15 and rear cover 16 are connected to the housing 14. The wave gasket 20 is set between the front bearing 17 and the bottom of the front cover 15. Because the wave gasket 20 is set between the front bearing 17 and the bottom of the front cover 15, the accuracy of the distance between the shaft extension end face and the flange end face of the existing servo motor is often affected by the accumulated tolerances of multiple components such as the rotor shaft 191, front cover 15, rear cover 16, housing 14, and wave gasket 20. Due to the influence of multiple components, it is impossible to achieve the high-precision distance between the shaft extension end face and the flange end face of the servo motor through ordinary assembly processes. Additional processes are required for correction, such as turning of the flange end face. Utility Model Content

[0004] The purpose of this application is to provide a stator assembly and a motor having the stator assembly. The structure of the stator assembly changes the installation position of the wave gasket on the motor, which can effectively reduce the number of components that affect the accuracy of the distance between the shaft extension end face and the flange end face of the motor, reduce the cumulative tolerance of the components and assembly errors, thereby improving the accuracy of the distance between the shaft extension end face and the flange end face of the motor and facilitating the assembly of the motor.

[0005] To achieve the above objectives, in a first aspect, this application provides a stator assembly, comprising:

[0006] stator body;

[0007] The first bearing bracket is disposed on one end of the stator body and has a first bearing mounting position.

[0008] The second bearing bracket is disposed on the opposite end of the stator body and forms a second bearing mounting position;

[0009] When the rear bearing is installed on the second bearing bracket via the second bearing mounting position, an installation gap is left between the rear bearing and the second bearing bracket, and the installation gap serves as the installation position for the corrugated gasket.

[0010] In the implementation of the above technical solution, the first bearing bracket is set on one end of the stator body and forms a first bearing mounting position, which is used for the installation of the front bearing; the second bearing bracket is set on the opposite end of the stator body and forms a second bearing mounting position, which is used for the installation of the rear bearing; when the rear bearing is installed on the second bearing bracket, a corrugated gasket installation gap is left between the rear bearing and the second bearing bracket, and the corrugated gasket is installed between the rear bearing and the second bearing bracket; compared with the prior art, the structure of this stator assembly changes the installation position of the corrugated gasket on the motor, from the previous position of the front bearing to the position of the rear bearing. This adjustment can effectively reduce the number of components that affect the accuracy of the distance between the motor shaft extension end face and the flange end face, reduce the cumulative tolerance of components and assembly errors, so that the accuracy of the distance between the motor shaft extension end face and the flange end face is only affected by the machining accuracy of the motor front end cover and the rotating shaft, thereby effectively improving the accuracy of the distance between the motor shaft extension end face and the flange end face, and facilitating the assembly of the motor without the need for additional correction processes.

[0011] In a preferred embodiment of this application, the first bearing bracket includes a first straight wall, a connecting wall, and a second straight wall.

[0012] One end of the first straight wall and one end of the second straight wall are respectively connected to different positions at one end of the stator body;

[0013] One end of the connecting wall is connected to the other end of the first straight wall, and the other end of the connecting wall is connected to the other end of the second straight wall;

[0014] The second straight wall has the first bearing mounting position formed thereon.

[0015] In the implementation of the above technical solution, the structure of the first bearing bracket of this type is relatively simple. It not only has a simple structure, but also has good structural strength and convenient installation of the front bearing, which enables the front bearing to be stably installed in the motor.

[0016] In a preferred embodiment of this application, the first straight wall and the second straight wall are arranged in parallel, and both the first straight wall and the second straight wall are parallel to the axis of the stator body.

[0017] In the implementation of the above technical solution, the second straight wall is parallel to the axis of the stator body, which allows the front bearing to fit tightly against the second straight wall of the first bearing bracket when the front bearing is installed in the motor; the first straight wall and the second straight wall are set parallel to each other, which can improve the structural strength of the first bearing bracket.

[0018] In a preferred embodiment of this application, the second bearing bracket includes a bracket connecting plate, a bracket side plate, and a bracket base plate.

[0019] One end of the bracket connecting plate is connected to the opposite end of the stator body, and the other end of the bracket connecting plate is connected to one end of the bracket side plate;

[0020] The other end of the bracket side plate is connected to the bracket base plate, and the bracket side plate and the bracket base plate form the second bearing mounting position;

[0021] When the rear bearing is installed on the second bearing bracket via the second bearing mounting position, an installation gap is left between the rear bearing and the bracket base plate of the second bearing bracket.

[0022] In the implementation of the above technical solution, the structure of the second bearing bracket of this type is relatively simple. It not only has a simple structure, but also has good structural strength and convenient installation of the rear bearing, which enables the rear bearing to be stably installed in the motor. It also has a base plate structure, which makes it easy to install the corrugated shim between the rear bearing and the second bearing bracket and ensures the stability of the corrugated shim.

[0023] In a preferred embodiment of this application, the bracket side plate is parallel to the axis of the stator body; the bracket connecting plate is parallel to the bracket base plate, and both the bracket connecting plate and the bracket base plate are perpendicular to the bracket side plate.

[0024] In the implementation of the above technical solution, the side plate of the bracket is parallel to the axis of the stator body, which allows the rear bearing to fit tightly against the side plate of the second bearing bracket when the rear bearing is installed in the motor; the arrangement of the bracket connecting plate and the bracket base plate can improve the structural strength of the second bearing bracket.

[0025] In a preferred embodiment of this application, both the first bearing bracket and the second bearing bracket are disposed on the stator body by injection molding process, and both form an integral structure with the stator body.

[0026] In the implementation of the above technical solution, both the first bearing bracket and the second bearing bracket are installed on the stator body through injection molding, which can greatly improve the structural strength and structural stability of the stator assembly.

[0027] Secondly, this application provides a motor having the stator assembly described above, the motor further comprising a housing, a front end cover, a rear end cover, a front bearing, a rear bearing, a rotor, and wave-shaped gaskets.

[0028] The stator assembly is disposed in the housing, and the rotor is disposed in the stator assembly;

[0029] The front cover is disposed at the front end of the housing, and the front bearing is fitted to the first bearing bracket and the front cover.

[0030] The rear end cover is disposed at the rear end of the housing, and the rear bearing is mounted against the second bearing bracket; the corrugated gasket is installed between the rear bearing and the second bearing bracket.

[0031] In the implementation of the above technical solution, the motor with the stator assembly described above can be a servo motor. The waveform shim is installed between the rear bearing and the second bearing bracket. Compared to existing technologies, this arrangement changes the installation position of the waveform shim on the motor, moving it from the previous position on the front bearing to the position on the rear bearing. This adjustment effectively reduces the number of components affecting the accuracy of the distance between the motor's shaft extension end face and the flange end face, reducing the cumulative tolerances and assembly errors of the components. This ensures that the accuracy of the distance between the motor's shaft extension end face and the flange end face is only affected by the machining accuracy of the motor's front end cover and shaft, thereby effectively improving the accuracy of the distance between the motor's shaft extension end face and the flange end face. Furthermore, it facilitates motor assembly without requiring additional correction processes. For servo motors, this allows for better adaptation and application in robots, ensuring the assembly accuracy of robot-related components.

[0032] In a preferred embodiment of this application, a positioning step is provided on the bottom surface of the front cover, and the positioning step and the first bearing mounting position form a first bearing mounting chamber. The front bearing is mounted on the first bearing bracket and the positioning step of the front cover through the first bearing mounting chamber.

[0033] In the implementation of the above technical solution, the positioning step on the bottom surface of the front cover can be used to position and limit the front bearing, thereby better ensuring the stability of the front bearing in the motor.

[0034] In a preferred embodiment of this application, a stop is provided at the front end of the housing, and a stop is provided at the connection position between the front cover and the front end of the housing, wherein the stop of the front cover and the stop of the front end of the housing cooperate with each other.

[0035] In the implementation of the above technical solution, the setting of the stop on the front cover and the stop on the front end of the housing facilitates the assembly of the front cover and the front end of the housing.

[0036] In a preferred embodiment of this application, a stop is provided at the rear end of the housing, and a stop is provided at the connection position between the rear end cover and the rear end of the housing, wherein the stop of the rear end cover and the stop of the rear end of the housing cooperate with each other.

[0037] In the implementation of the above technical solution, the setting of the stop of the rear end cover and the stop of the rear end of the housing facilitates the assembly of the rear end cover and the rear end of the housing.

[0038] This application discloses a stator assembly and a motor having the stator assembly, which, compared with the prior art, have at least the following advantages:

[0039] The stator assembly of this application includes a stator body, a first bearing bracket, and a second bearing bracket. The first bearing bracket is disposed on one end of the stator body and forms a first bearing mounting position for mounting the front bearing. The second bearing bracket is disposed on the opposite end of the stator body and forms a second bearing mounting position for mounting the rear bearing. When the rear bearing is mounted on the second bearing bracket via the second bearing mounting position, an installation gap is left between the rear bearing and the second bearing bracket, which serves as the mounting position for the corrugated gasket. Compared with the prior art, the structure of this stator assembly changes the mounting position of the corrugated gasket on the motor, moving it from the previous position of the front bearing to the position of the rear bearing. This adjustment can effectively reduce the number of components that affect the accuracy of the distance between the motor shaft extension end face and the flange end face, reduce the cumulative tolerance of components and assembly errors, so that the accuracy of the distance between the motor shaft extension end face and the flange end face is only affected by the machining accuracy of the motor's front end cover and shaft. This can effectively improve the accuracy of the distance between the motor shaft extension end face and the flange end face, and facilitate motor assembly without the need for additional correction processes.

[0040] The motor with the stator assembly described in this application can be a servo motor. The wave-shaped gasket is installed between the rear bearing and the second bearing bracket, which can effectively reduce the number of components that affect the accuracy of the distance between the motor shaft extension end face and the flange end face, improve the accuracy of the distance between the motor shaft extension end face and the flange end face, and facilitate the assembly of the motor without the need for additional correction processes. For servo motors, this can be better adapted and applied to robots, ensuring the assembly accuracy of robot-related components. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a cross-sectional structural diagram of a stator and housing in the prior art;

[0043] Figure 2 This is a cross-sectional structural diagram of an electric motor in the prior art;

[0044] Figure 3 yes Figure 2 Enlarged view of a local structure in the image;

[0045] Figure 4 This is a cross-sectional structural diagram of the stator assembly and housing provided in the embodiments of this application;

[0046] Figure 5 This is a cross-sectional structural schematic diagram of the motor provided in the embodiments of this application;

[0047] Figure 6 yes Figure 5 One of the enlarged views of the local structure in the image;

[0048] Figure 7 yes Figure 5 The second enlarged view of a local structure in the image.

[0049] Reference numerals: 11-Stator body; 12-First bearing bracket; 121-First straight wall; 122-Connecting wall; 123-Second straight wall; 13-Second bearing bracket; 131-Bracket connecting plate; 132-Bracket side plate; 133-Bracket base plate; 14-Casing; 15-Front end cover; 151-Positioning step; 16-Rear end cover; 17-Front bearing; 18-Rear bearing; 19-Rotor; 191-Shaft; 20-Wave wave gasket. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0051] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0052] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0053] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0054] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0055] See Figures 1 to 3 In robot applications, due to the special installation of servo motors, the distance between the shaft extension end face and the flange end face of the servo motor is often important. Figure 2The spacing (represented by A in the diagram) has high requirements to ensure the assembly accuracy of robot-related components.

[0056] The existing servo motor structure mainly includes components such as housing 14, stator body 11, front cover 15, rear cover 16, wave gasket 20, and rotor 19. Among them, the front bearing 17 and rear bearing 18 of the rotor 19 of the existing servo motor are respectively fitted with bearing chambers formed on the front cover 15 and rear cover 16. Since the wave gasket 20 is set between the front bearing 17 and the bottom of the front cover 15, the accuracy of the distance between the shaft extension end face and the flange end face of the existing servo motor is often affected by the accumulated tolerances of multiple components such as the rotor shaft 191, front cover 15, rear cover 16, housing 14, and wave gasket 20. Due to the influence of multiple components, it is impossible to achieve the high-precision requirement of the distance between the shaft extension end face and the flange end face of the servo motor through ordinary assembly process.

[0057] To address the problems in the prior art, this application provides a stator assembly and a motor having the stator assembly. The structure of the stator assembly changes the installation position of the waveform gasket on the motor, which can effectively reduce the number of components that affect the accuracy of the distance between the shaft extension end face and the flange end face of the motor, reduce the cumulative tolerance of components and assembly errors, thereby improving the accuracy of the distance between the shaft extension end face and the flange end face of the motor and facilitating the assembly of the motor.

[0058] Example 1

[0059] See Figures 4 to 7 The stator assembly in this application embodiment includes:

[0060] Stator body 11;

[0061] The first bearing bracket 12 is disposed on one end of the stator body 11 and forms a first bearing mounting position;

[0062] The second bearing bracket 13 is disposed on the opposite end of the stator body 11 and forms a second bearing mounting position.

[0063] When the rear bearing 18 is installed on the second bearing bracket 13 via the second bearing mounting position, there is an installation gap between the rear bearing 18 and the second bearing bracket 13. The installation gap serves as the installation position for the wave shim 20.

[0064] In this embodiment, the stator body 11 is the stator of a conventional motor, and the first bearing bracket 12 and the second bearing bracket 13 are additional structures provided on the stator body 11; wherein, the first bearing bracket 12 is specifically provided on the front end of the stator body 11, and the second bearing bracket 13 is specifically provided on the rear end of the stator body 11. In this embodiment, the front and rear directions are determined by the positions of the front end cover 15 and the rear end cover 16 in the motor.

[0065] The first bearing bracket 12 has a first bearing mounting position, which means that the mounting position can be used as the mounting position of the first bearing. That is, the first bearing bracket 12 is used for the mounting of the front bearing 17, and the first bearing corresponds to the front bearing 17. The second bearing bracket 13 has a second bearing mounting position, which means that the mounting position can be used as the mounting position of the second bearing. That is, the second bearing bracket 13 is used for the mounting of the rear bearing 18, and the second bearing corresponds to the rear bearing 18.

[0066] In this embodiment, when the rear bearing 18 is installed on the second bearing bracket 13 through the second bearing mounting position, there is an installation gap between the rear bearing 18 and the second bearing bracket 13, and this installation gap serves as the installation position of the corrugated shim 20. That is, the corrugated shim 20 can be installed between the rear bearing 18 and the second bearing bracket 13, thereby being installed at the position of the rear bearing 18.

[0067] In this embodiment of the stator assembly, a first bearing bracket 12 is disposed on one end of the stator body 11 and forms a first bearing mounting position. The first bearing bracket 12 is used for mounting the front bearing 17. A second bearing bracket 13 is disposed on the opposite end of the stator body 11 and forms a second bearing mounting position. The second bearing bracket 13 is used for mounting the rear bearing 18. When the rear bearing 18 is mounted on the second bearing bracket 13, a corrugated shim 20 is provided between the rear bearing 18 and the second bearing bracket 13 for installation. The corrugated shim 20 is installed between the rear bearing 18 and the second bearing bracket 13. Compared with the prior art, this... The stator assembly structure has changed the mounting position of the wave gasket 20 on the motor, moving it from the previous position of the front bearing 17 to the position of the rear bearing 18. This adjustment can effectively reduce the number of components that affect the accuracy of the distance between the motor shaft extension end face and the flange end face, reduce the cumulative tolerance of components and assembly errors, so that the accuracy of the distance between the motor shaft extension end face and the flange end face is only affected by the machining accuracy of the motor front end cover 15 and the rotating shaft 191, thereby effectively improving the accuracy of the distance between the motor shaft extension end face and the flange end face, and facilitating the assembly of the motor without the need for additional correction processes.

[0068] As an optional implementation, the first bearing bracket 12 and the second bearing bracket 13 can both be installed on the stator body 11 by injection molding, and both form an integral structure with the stator body 11.

[0069] The first bearing bracket 12 and the second bearing bracket 13 are both integrated with the stator body 11. It can be understood that the first bearing bracket 12 and the second bearing bracket 13 are integrated with the stator body 11 and have formed a whole.

[0070] In the above structure, the first bearing bracket 12 and the second bearing bracket 13 are both set on the stator body 11 by injection molding process, which can make the first bearing bracket 12 and the second bearing bracket 13 firmly on both ends of the stator body 11 and not easily separated, thus greatly improving the structural strength and structural stability of the stator assembly.

[0071] Example 2

[0072] See Figures 4 to 7 Based on the above embodiment one, the difference between this embodiment and embodiment one is that the stator assembly in this embodiment, the first bearing bracket 12 includes a first straight wall 121, a connecting wall 122 and a second straight wall 123.

[0073] One end of the first straight wall 121 and one end of the second straight wall 123 are respectively connected to different positions at one end of the stator body 11;

[0074] One end of the connecting wall 122 is connected to the other end of the first straight wall 121, and the other end of the connecting wall 122 is connected to the other end of the second straight wall 123.

[0075] The second straight wall 123 forms the first bearing mounting position.

[0076] In this embodiment, the first straight wall 121 and the second straight wall 123 are two straight walls on the first bearing support 12, and also two parts of the first bearing support 12; the connecting wall 122 serves as the part connecting the first straight wall 121 and the second straight wall 123. It can be a straight wall or a non-straight wall. In this embodiment, the connecting wall 122 adopts a non-straight wall structure.

[0077] In the above structure, the first bearing bracket 12 has a relatively simple structure. It not only has a simple structure, but also has two connection support points, which are respectively connected to different positions at one end of the stator body 11 by the first straight wall 121 and the second straight wall 123, thus having good structural strength. Furthermore, the second straight wall 123 forms the first bearing mounting position, which facilitates the installation of the front bearing 17 and enables the front bearing 17 to be stably installed in the motor.

[0078] Furthermore, in this embodiment, the first straight wall 121 and the second straight wall 123 are arranged in parallel, and both the first straight wall 121 and the second straight wall 123 are parallel to the axis of the stator body 11.

[0079] The second straight wall 123 is parallel to the axis of the stator body 11, which allows the front bearing 17 to fit tightly against the second straight wall 123 of the first bearing bracket 12 when the front bearing 17 is installed in the motor. The first straight wall 121 is parallel to the second straight wall 123, that is, the first straight wall 121 and the second straight wall 123 are parallel to the axis of the stator body 11. This arrangement of the straight walls is more scientific and can form a stable lever arm, thereby improving the structural strength of the first bearing bracket 12.

[0080] Example 3

[0081] See Figures 4 to 7 Based on the above embodiment one or embodiment two, the difference between this embodiment and embodiment one or embodiment two is that, in this embodiment, the stator assembly, the second bearing bracket 13, includes a bracket connecting plate 131, a bracket side plate 132, and a bracket base plate 133.

[0082] One end of the bracket connecting plate 131 is connected to the opposite end of the stator body 11, and the other end of the bracket connecting plate 131 is connected to one end of the bracket side plate 132.

[0083] The other end of the bracket side plate 132 is connected to the bracket base plate 133, and the bracket side plate 132 and the bracket base plate 133 form a second bearing mounting position;

[0084] When the rear bearing 18 is installed on the second bearing bracket 13 via the second bearing mounting position, an installation gap is left between the rear bearing 18 and the bracket base plate 133 of the second bearing bracket 13.

[0085] In this embodiment, the second bearing bracket 13 adopts a different structure from the first bearing bracket 12. The second bearing bracket 13 and the first bearing bracket 12 adopt a more suitable structure according to their positions and corresponding functions. Therefore, the structure of the second bearing bracket 13 is different from the structure of the first bearing bracket 12.

[0086] In this embodiment, the bracket connecting plate 131, the bracket side plate 132, and the bracket base plate 133 are all straight plate structures, which are three different parts of the second bearing bracket 13. The bracket connecting plate 131 is used to connect the stator body 11 and the bracket side plate 132. The bracket side plate 132 and the bracket base plate 133 form a second bearing mounting position for the installation of the rear bearing 18. When the rear bearing 18 is installed on the second bearing bracket 13 through the second bearing mounting position, an installation gap is left between the rear bearing 18 and the bracket base plate 133 of the second bearing bracket 13 for the installation of the corrugated gasket 20.

[0087] In the above structure, the structure of the second bearing bracket 13 is relatively simple. It not only has a simple structure, but also has good structural strength. It can also facilitate the installation of the rear bearing 18 and the corrugated shim 20, so that the rear bearing 18 and the corrugated shim 20 can be stably installed in the motor. The base plate structure can facilitate the installation of the corrugated shim 20 between the rear bearing 18 and the second bearing bracket 13, and ensure the stability of the corrugated shim 20.

[0088] Furthermore, in this embodiment, the support side plate 132 is parallel to the axis of the stator body 11; the support connecting plate 131 is parallel to the support base plate 133, and both the support connecting plate 131 and the support base plate 133 are perpendicular to the support side plate 132.

[0089] The bracket side plate 132 is parallel to the axis of the stator body 11, which allows the rear bearing 18 to fit tightly against the bracket side plate 132 of the second bearing bracket 13 when it is installed in the motor. The arrangement of the bracket connecting plate 131 and the bracket base plate 133 makes the bracket side plate 132, the bracket connecting plate 131, and the bracket base plate 133 all right-angle structures. The right-angle plate connection method is more scientific and has better structural rigidity, which can improve the structural strength of the second bearing bracket 13.

[0090] Example 4

[0091] See Figures 4 to 7 This application provides a motor having a stator assembly from any of the embodiments one to three described above. The motor further includes a housing 14, a front end cover 15, a rear end cover 16, a front bearing 17, a rear bearing 18, a rotor 19, and a wave-shaped gasket 20.

[0092] The stator assembly is housed in the housing 14, and the rotor 19 is housed in the stator assembly;

[0093] The front cover 15 is located at the front end of the housing 14, and the front bearing 17 is attached to the first bearing bracket 12 and the front cover 15.

[0094] The rear end cover 16 is located at the rear end of the housing 14, and the rear bearing 18 is mounted against the second bearing bracket 13; the wave-shaped gasket 20 is installed between the rear bearing 18 and the second bearing bracket 13.

[0095] In this embodiment, when assembling the motor, the stator body 11, the first bearing bracket 12, and the second bearing bracket 13 can be injection molded to form an integral structure, and then assembled with the housing 14 to form the stator assembly. An interference fit is used when assembling with the housing 14. Then, the rotor 19 is first assembled with the front end cover 15 and the front bearing 17, and then assembled with the first bearing bracket 12 and the second bearing bracket 13 of the stator assembly. Then, the rear bearing 18, the wave shim 20, and the rear end cover 16 are assembled, and then the front bearing 17 is attached to the front end cover 15, so that the front end cover 15 is connected to the housing 14.

[0096] Compared to the assembly direction of the motor in the prior art, which is from the rear bearing 18 to the front bearing 17, the assembly direction of the motor in this embodiment is from the front bearing 17 to the rear bearing 18, so that the wave shim 20 can be set at the position of the rear bearing 18.

[0097] The motor with the stator assembly described above in this application embodiment can be a servo motor. The waveform shim 20 is installed between the rear bearing 18 and the second bearing bracket 13. Compared to the prior art, this arrangement changes the installation position of the waveform shim 20 on the motor, moving it from the previous position of the front bearing 17 to the position of the rear bearing 18. This adjustment effectively reduces the number of components affecting the accuracy of the distance between the motor's shaft extension end face and the flange end face, reducing the cumulative tolerances and assembly errors of the components. This ensures that the accuracy of the distance between the motor's shaft extension end face and the flange end face is only affected by the machining accuracy of the motor's front end cover 15 and the rotating shaft 191, thereby effectively improving the accuracy of the distance between the motor's shaft extension end face and the flange end face. Furthermore, it facilitates motor assembly without requiring additional steps for correction. For servo motors, this allows for better adaptation and application in robots, ensuring the assembly accuracy of robot-related components.

[0098] Furthermore, in this embodiment, a stop is provided at the front end of the housing 14, and a stop is provided at the connection position between the front cover 15 and the front end of the housing 14. The stop of the front cover 15 and the stop of the front end of the housing 14 are matched. The setting of the stop of the front cover 15 and the stop of the front end of the housing 14 facilitates the assembly of the front cover 15 and the front end of the housing 14.

[0099] The rear end of the housing 14 is provided with a stop, and the connection position between the rear end cover 16 and the rear end of the housing 14 is provided with a stop. The stop of the rear end cover 16 and the stop of the rear end of the housing 14 are matched. The setting of the stop of the rear end cover 16 and the stop of the rear end of the housing 14 facilitates the assembly of the rear end cover 16 and the rear end of the housing 14.

[0100] Example 5

[0101] See Figures 4 to 7 Based on the above embodiment four, the difference between this embodiment and embodiment four is that, in this embodiment, the motor has a positioning step 151 on the bottom surface of the front end cover 15. The positioning step 151 and the first bearing mounting position form a first bearing mounting chamber. The front bearing 17 is mounted on the first bearing bracket 12 and the positioning step 151 of the front end cover 15 through the first bearing mounting chamber.

[0102] In this embodiment, the positioning step 151 provided on the bottom surface of the front cover 15 also serves as part of the mounting position of the front bearing 17. The end face of the positioning step 151 and the first bearing mounting position together form the first bearing mounting chamber, which is used for the installation of the front bearing 17 and serves as the mounting position of the front bearing 17.

[0103] In the above structure, the positioning step 151 on the bottom surface of the front cover 15 can position and limit the front bearing 17, thereby better ensuring the stability of the front bearing 17 in the motor.

[0104] In all the above embodiments, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0105] It should be understood that phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0106] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0107] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A stator assembly characterized by, include: Stator body(11); The first bearing bracket (12) is disposed on one end of the stator body (11) and has a first bearing mounting position. The second bearing bracket (13) is disposed on the opposite end of the stator body (11) and has a second bearing mounting position. When the rear bearing (18) is installed on the second bearing bracket (13) through the second bearing mounting position, there is an installation gap between the rear bearing (18) and the second bearing bracket (13), and the installation gap serves as the installation position of the wave shim (20).

2. The stator assembly of claim 1, wherein, The first bearing bracket (12) includes a first straight wall (121), a connecting wall (122), and a second straight wall (123). One end of the first straight wall (121) and one end of the second straight wall (123) are respectively connected to different positions at one end of the stator body (11); One end of the connecting wall (122) is connected to the other end of the first straight wall (121), and the other end of the connecting wall (122) is connected to the other end of the second straight wall (123); The second straight wall (123) has the first bearing mounting position formed thereon.

3. The stator assembly of claim 2, wherein, The first straight wall (121) and the second straight wall (123) are arranged in parallel, and both the first straight wall (121) and the second straight wall (123) are parallel to the axis of the stator body (11).

4. The stator assembly of claim 1, wherein, The second bearing bracket (13) includes a bracket connecting plate (131), a bracket side plate (132), and a bracket base plate (133). One end of the bracket connecting plate (131) is connected to the opposite end of the stator body (11), and the other end of the bracket connecting plate (131) is connected to one end of the bracket side plate (132); The other end of the bracket side plate (132) is connected to the bracket base plate (133), and the bracket side plate (132) and the bracket base plate (133) form the second bearing mounting position; When the rear bearing (18) is installed on the second bearing bracket (13) through the second bearing mounting position, there is an installation gap between the rear bearing (18) and the bracket base plate (133) of the second bearing bracket (13).

5. The stator assembly of claim 4, wherein, The bracket side plate (132) is parallel to the axis of the stator body (11); the bracket connecting plate (131) is parallel to the bracket base plate (133), and both the bracket connecting plate (131) and the bracket base plate (133) are perpendicular to the bracket side plate (132).

6. A stator assembly according to any one of claims 1-5, characterized in that The first bearing bracket (12) and the second bearing bracket (13) are both installed on the stator body (11) by injection molding process, and both form an integral structure with the stator body (11).

7. An electric machine having a stator assembly as claimed in any one of claims 1 to 6, characterised in that, The motor also includes a housing (14), a front cover (15), a rear cover (16), a front bearing (17), a rear bearing (18), a rotor (19), and a wave-shaped gasket (20). The stator assembly is disposed in the housing (14), and the rotor (19) is disposed in the stator assembly; The front cover (15) is disposed at the front end of the housing (14), and the front bearing (17) is attached to the first bearing bracket (12) and installed with the front cover (15); The rear end cover (16) is disposed at the rear end of the housing (14), and the rear bearing (18) is mounted against the second bearing bracket (13); the wave-shaped gasket (20) is installed between the rear bearing (18) and the second bearing bracket (13).

8. The electric machine of claim 7, wherein, A positioning step (151) is provided on the bottom surface of the front cover (15). The positioning step (151) and the first bearing mounting position form a first bearing mounting chamber. The front bearing (17) is mounted by fitting the first bearing bracket (12) and the positioning step (151) of the front cover (15) through the first bearing mounting chamber.

9. The electric machine of claim 7, wherein, The front end of the housing (14) is provided with a stop, and the connection position between the front end cover (15) and the front end of the housing (14) is provided with a stop, and the stop of the front end cover (15) cooperates with the stop of the front end of the housing (14).

10. The electric machine of claim 7, wherein, The rear end of the housing (14) is provided with a stop, and the connection position between the rear end cover (16) and the rear end of the housing (14) is provided with a stop, and the stop of the rear end cover (16) cooperates with the stop of the rear end of the housing (14).

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