Motor

Abstract

The utility model discloses a motor, comprising a top cover used for being connected with a stator assembly; the top cover and the bottom cover are arranged at intervals in the axial direction, and the bottom cover is used for being connected with a stator assembly; the shell is arranged around the stator assembly and the rotor in the circumferential direction and comprises a first connecting part, a body and a second connecting part, the first connecting part and the second connecting part are arranged at the two ends of the body at intervals in the axial direction, and the first connecting part is detachably connected with the top cover; the second connecting part is detachably connected with the bottom cover. The first connecting part and the stator assembly are oppositely arranged at an interval in the axial direction. The second connecting part and the stator assembly are oppositely arranged at an interval in the axial direction. According to the utility model, the space occupation of the motor in the radial direction can be reduced, the radial size of the motor is reduced, the spatial arrangement of the motor is optimized, and the requirement of the motor with higher radial space requirement is met.

Description

Technical Field

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

[0002] With the continuous development of intelligent manufacturing, motor technology is constantly iterating and developing. Miniaturization and intelligence are important directions for motor development. For example, in the development of new energy vehicles, there are high requirements for the utilization rate of the vehicle's space layout. Therefore, the space that can be reserved for motor installation also needs to be reduced.

[0003] For existing motors, since there is no limitation on radial space, they occupy a large space in the radial direction. For example, their wall thickness can protrude outwards in the radial direction, and the screw holes for connecting with the side cover can be located on the outer ring of the motor housing. This is not conducive to the arrangement of the motor and cannot meet the needs of motor technology development. For example, in axial flux motors, due to the limitations of the motor's outer diameter and performance, the front and rear stators need to be fixed together in a limited radial space. The distance between the outer diameter of the coil and the limiting outer diameter of the motor is very small, leaving only a few millimeters of space in the radial direction to arrange the housing. It is impossible to arrange threaded holes and screws in the radial space, and the side cover where the front and rear stators are located cannot be stably connected to the housing. Therefore, existing technology cannot achieve the goal of fixing the front and rear stators and the housing together in a limited radial space. Utility Model Content

[0004] The purpose of this invention is to solve the problem of how to optimize the spatial arrangement of a motor. This invention provides a motor that can reduce the space occupied by the motor in the radial direction, reduce the radial dimension of the motor, optimize the spatial arrangement of the motor, and meet the needs of motors with high requirements for radial space.

[0005] To solve the above-mentioned technical problems, an embodiment of this utility model discloses an electric motor, comprising:

[0006] Top cover, used for connection with the stator assembly;

[0007] A bottom cover, along the axial direction, wherein the top cover and the bottom cover are spaced apart, and the bottom cover is used to connect to the stator assembly;

[0008] A housing is provided circumferentially around the stator assembly and the rotor. The housing includes a first connecting portion, a body, and a second connecting portion. Along the axial direction, the first connecting portion and the second connecting portion are spaced apart at both ends of the body. The first connecting portion is detachably connected to the top cover, and the second connecting portion is detachably connected to the bottom cover. The first connecting portion and the stator assembly are spaced apart and opposite to each other in the axial direction, and the second connecting portion is spaced apart and opposite to the stator assembly in the axial direction.

[0009] Using the above technical solution, the housing is arranged around the stator assembly and rotor in the circumferential direction. The housing includes a first connecting part, a body and a second connecting part. Along the axial direction, the first connecting part and the second connecting part are spaced apart at both ends of the body. The first connecting part is detachably connected to the top cover and the second connecting part is detachably connected to the bottom cover. The first connecting part and the stator assembly are spaced apart and opposite to each other in the axial direction. The second connecting part and the stator assembly are spaced apart and opposite to each other in the axial direction. By setting the first connecting part and the second connecting part on both sides of the stator assembly in the axial direction, the space of the stator assembly in the axial direction (e.g., the axial space outside the stator coil) is fully utilized to arrange the first connecting part and the second connecting part. Since the top cover and the bottom cover are both connected to the stator assembly, the stator assembly and the housing can be stably connected in a limited space through the axial connection of the top cover, the bottom cover and the housing, even when the radial space is very compact. In this way, neither the first connecting part nor the second connecting part is arranged radially at intervals with the stator assembly. That is, in the radial direction, there is no need to set out an outward protruding connecting structure to connect the housing with the top cover and the bottom cover. This can reduce the radial dimension of the motor, making the motor structure compact in the radial direction, and will not affect the normal use of the motor. This optimizes the spatial arrangement of the motor and meets the needs of motors with high radial space requirements.

[0010] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electric motor, the body of which includes a first outer wall, the first connecting part and the second connecting part both including a second outer wall, the first outer wall and the second outer wall being connected, and along the axial direction, the first outer wall being flush with the second outer wall, the outer wall of the top cover and the outer wall of the bottom cover.

[0011] By adopting the above technical solution, the first outer wall is flush with the second outer wall, the outer wall of the top cover, and the outer wall of the bottom cover along the axial direction. That is, neither the first outer wall nor the second outer wall is included in the radially outward protruding part. Neither the first outer wall nor the second outer wall is higher than the top cover and the bottom cover, which makes the structure of the motor compact in the radial direction.

[0012] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electric motor, the body including a first inner wall, the first outer wall and the first inner wall being radially opposite to each other on both sides of the body, the first connecting part and the second connecting part including a second inner wall, the first inner wall and the second inner wall intersecting, the second inner wall and the stator assembly being axially spaced and opposite to each other;

[0013] The first inner wall and the second inner wall include an insulating layer, or the first inner wall and the second inner wall are made of an insulating material.

[0014] Using the above technical solution, the body includes a first inner wall, the first connecting part and the second connecting part include a second inner wall, and the first inner wall and the second inner wall intersect, that is, the first inner wall is radially spaced from and opposite to the outer peripheral surface of the stator assembly, and the second inner wall is axially spaced from and opposite to the stator assembly. Further, the first inner wall and the second inner wall include an insulating layer, or the first inner wall and the second inner wall are made of insulating material, which can facilitate further compression of the motor's radial dimensions. For example, along the radial direction, the distance between the body and the stator can be compressed to the millimeter level without worrying about the problem of small electrical clearance caused by the coils and housing of the stator assembly being too close.

[0015] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a motor, wherein the first connecting part includes a first protrusion extending inward from the first inner wall, the second connecting part includes a second protrusion extending inward from the first inner wall, the first protrusion is detachably connected to the top cover, and the second protrusion is detachably connected to the bottom cover.

[0016] Using the above technical solution, the first connecting part includes a first protrusion extending inward from one end of the body, and the second connecting part includes a second protrusion extending inward from the other end of the body. The first protrusion is detachably connected to the top cover, and the second protrusion is detachably connected to the bottom cover. Therefore, it is possible to ensure that the body is stably connected to the top cover and the bottom cover without increasing the space occupied by the motor in the radial direction.

[0017] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electric motor, wherein the body, the first protrusion and the second protrusion are all annular.

[0018] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a motor in which a first protrusion is fitted to the top cover along the axial direction and the first protrusion is disposed between the top cover and the stator assembly; a second protrusion is fitted to the bottom cover and the second protrusion is disposed between the bottom cover and the stator assembly; the first protrusion and the second protrusion are spaced apart from and opposite to the stator assembly in the axial direction.

[0019] By adopting the above technical solution, the first protrusion is fitted to the top cover along the axial direction, and the second protrusion is fitted to the bottom cover. On the one hand, this reduces the space occupied by the first and second connecting parts in the axial direction. On the other hand, it makes full use of the friction between the first protrusion and the top cover, and between the second protrusion and the bottom cover, when they are fitted together, thereby further improving the connection stability.

[0020] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a motor, including a first connector and a second connector. Along the axial direction, the first protrusion includes a first connecting hole, and the top cover includes a second connecting hole. The first connector passes through the first connecting hole and the second connecting hole in sequence along the axial direction.

[0021] Along the axial direction, the second protrusion includes a third connecting hole, the bottom cover includes a fourth connecting hole, and the second connector passes through the third connecting hole and the fourth connecting hole in sequence along the axial direction.

[0022] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electric motor, wherein the housing includes a first part and a second part, both the first part and the second part include the body, the first protrusion and the second protrusion, and the first part and the second part are joined together in the circumferential direction.

[0023] Using the above technical solution, the housing is divided into a first part and a second part that are connected to each other in the circumferential direction, which facilitates the installation and disassembly of the motor.

[0024] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a motor in which one end of the first part and one end of the second part are connected along the circumferential direction, and the other end of the first part and the other end of the second part are spaced apart. The other end of the first part, the other end of the second part, the top cover and the bottom cover together form a wiring groove.

[0025] Using the above technical solution, the other end of the first part, the other end of the second part, the top cover and the bottom cover together form a wiring groove, which makes it easy for users to lead out the coil of the stator assembly, and when the coil malfunctions, it can also be easily observed and repaired through the wiring groove.

[0026] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a motor, wherein the first part includes a first through hole, the first through hole is disposed in the body of the first part, and is used for assembling and disassembling the first part; the second part includes a second through hole, the second through hole is disposed in the body of the second part, and is used for assembling and disassembling the second part.

[0027] With the above technical solution, a first through hole is provided in the body of the first part for assembling and disassembling the first part, and the second part includes a second through hole, which is provided in the body of the second part for assembling and disassembling the second part. This allows the user to easily insert their hand into the first through hole to install or remove the first part from the motor, and also allows the user to easily insert their hand into the second through hole to install or remove the second part from the motor, thus improving assembly and disassembly efficiency.

[0028] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an electric motor, wherein the stator assembly includes a first stator and a second stator, and along the axial direction, the rotor is disposed between the first stator and the second stator, the first stator is disposed between the rotor and the top cover, and the second stator is disposed between the rotor and the bottom cover;

[0029] Along the axial direction, the first stator is spaced apart from the first protrusion, and the second stator is spaced apart from the second protrusion.

[0030] By adopting the above technical solution, the radial dimension of the motor can be reduced, making the motor structure more compact in the radial direction without affecting the normal use of the motor. This optimizes the spatial arrangement of the motor and meets the needs of a single-rotor dual-stator axial flux motor with high radial space requirements. Attached Figure Description

[0031] Figure 1 Cross-sectional schematic diagrams of the motor are shown in some embodiments.

[0032] Figure 2 A three-dimensional schematic diagram of the motor provided in an embodiment of this application is shown.

[0033] Figure 3 A color three-dimensional schematic diagram of the motor provided in an embodiment of this application is shown.

[0034] Figure 4 A cross-sectional view of the motor provided in an embodiment of this application is shown.

[0035] Figure 4a A wireframe sectional view of the motor provided in an embodiment of this application is shown.

[0036] Figure 5 A partially enlarged cross-sectional view of the motor provided in an embodiment of this application is shown.

[0037] Figure 6 The motor provided in the embodiment of this application is shown. Figure 5 A magnified view of a portion of the image.

[0038] Figure 7 An exploded view of the first and second portions of the housing of the motor provided in an embodiment of this application is shown.

[0039] Figure 8 An exploded wireframe view of the first and second portions of the housing of the motor provided in an embodiment of this application is shown. Detailed Implementation

[0040] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0041] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0043] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0044] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0046] In some embodiments, see Figure 1The motor includes a housing 10 and a side cover 11. The housing 10 includes a protrusion 101 extending radially Y. The protrusion 101 protrudes from one end of the housing 10 toward the side away from the stator 12. The outer peripheral surface 102 of the housing 10 is uneven in the axial direction X. To connect the side cover 11 and the housing 10, the thickness of the side cover 11 in the radial direction Y is increased, making the side cover 11 flush with the protrusion 101 in the axial direction X. Screw holes are provided on the protrusion 101 for connecting the side cover 11 and the housing 10. With the above solution, since the motor is not restricted in radial space, the housing 10 has a protrusion 101 extending radially Y. The protrusion 101 occupies the radial space of the motor, causing the outer peripheral surface 102 of the housing 10 to be uneven in the axial direction X. Its protruding portion (e.g., protrusion 101) increases the size of the motor in the radial direction Y, which is not conducive to the arrangement of the motor.

[0047] Based on this, see Figure 2 , Figure 3 , Figure 4 This application provides an electric motor, including a top cover 20, a bottom cover 30, a housing 40, a stator assembly 50, and a rotor 60. The top cover 20 and bottom cover 30 are spaced apart along the axial direction X, and the housing 40 surrounds the stator assembly 50 and rotor 60 in the circumferential direction R. Exemplarily, the top cover 20 and bottom cover 30 may also be provided with liquid cooling channels (not shown in the figure), which act as cooling plates to allow coolant to flow into the motor.

[0048] For example, see Figure 2 , Figure 3 , Figure 4 The stator assembly 50 includes a first stator 51 and a second stator 52. Along the axial direction X, a rotor 60 is disposed between the first stator 51 and the second stator 52. The first stator 51 is disposed between the rotor 60 and the top cover 20, and the second stator 52 is disposed between the rotor 60 and the bottom cover 30. The motor also includes a rotating shaft 70. One end of the rotor 60 is disposed on the rotating shaft 70, and the other end of the rotor 60, located radially Y away from the rotating shaft 70, is provided with a magnet 61. The first stator 51 includes a plurality of first stator teeth 510, which are spaced apart circumferentially R. Each first stator tooth 510 is surrounded by a first coil 511. The first stator teeth 510 are connected to the top cover 20 (e.g., by bolts; this embodiment does not limit this connection). The second stator 52 includes a plurality of second stator teeth 520, which are spaced apart circumferentially in the direction R. A second coil 521 is arranged around the outer periphery of each second stator tooth 520. The second stator teeth 520 are connected to the bottom cover 30 (e.g., by bolts, but this application does not limit this). The first coil 511 and the second coil 521 are both spaced apart from and opposite to the magnet 61 in the axial direction X.

[0049] In some embodiments, see Figure 4 , Figure 4a The housing 40 includes a first connecting portion 41, a body 42, and a second connecting portion 43. Along the axial direction X, the first connecting portion 41 and the second connecting portion 43 are spaced apart at both ends of the body 42. The first connecting portion 41 is detachably connected to the top cover 20, and the second connecting portion 43 is detachably connected to the bottom cover 30. The first connecting portion 41 and the stator assembly 50 are spaced apart and opposite to each other along the axial direction X, and the second connecting portion 43 is also spaced apart and opposite to the stator assembly 50 along the axial direction X. Exemplarily, along the axial direction X, the first stator 51 is spaced apart from the first connecting portion 41, and the second stator 52 is spaced apart from the second connecting portion 43. Exemplarily, the first connecting portion 41, the body 42, and the second connecting portion 43 can be integrally formed; this embodiment of the application does not limit this.

[0050] Using the above technical solution, the housing 40 is arranged around the stator assembly 50 and rotor 60 in the circumferential direction R. The housing 40 includes a first connecting part 41, a body 42, and a second connecting part 43. Along the axial direction X, the first connecting part 41 and the second connecting part 43 are spaced apart at both ends of the body 42. The first connecting part 41 is detachably connected to the top cover 20, and the second connecting part 43 is detachably connected to the bottom cover 30. The first connecting part 41 and the stator assembly 50 are spaced apart and opposite to each other in the axial direction X, and the second connecting part 43 is also spaced apart and opposite to the stator assembly 50 in the axial direction X. This embodiment of the application makes full use of the space of the stator assembly 50 in the axial direction X by changing the structure of the motor housing 40 (e.g., ...). Figure 4 (The part enclosed by the dashed line b) is used to connect the top cover 20, the bottom cover 30 and the housing 40. For example, the first connecting part 41 is arranged in the axial space outside the first coil 511 to connect the top cover 20 and the housing 40; the second connecting part 43 is arranged in the axial space outside the second coil 521 to connect the bottom cover 30 and the housing 40. Since the top cover 20 is connected to the first stator tooth 510 and the bottom cover 30 is connected to the second stator tooth 520, the stator assembly 50 and the housing 40 can be stably connected in a limited space even when the radial space of the motor is very compact.

[0051] Thus, neither the first connecting part 41 nor the second connecting part 43 is spaced apart from the stator assembly 50 in the radial Y direction. That is, in the radial Y direction, there is no need to provide an outward protruding structure to connect the housing 40 with the top cover 20 and the bottom cover 30. This allows the housing 40 to be as close as possible to the first coil 511 and the second coil 521 in the radial space. Along the radial Y direction, the distance between the housing 40 and the first coil 511 and the second coil 521 can be reduced to the millimeter level (e.g., 3 mm to 5 mm, which is not limited in this embodiment). This reduces the radial dimension of the motor, making the structure of the motor in the radial Y direction more compact, and does not affect the normal use of the motor. This optimizes the spatial arrangement of the motor and meets the needs of motors with high requirements for radial space (e.g., axial flux motors).

[0052] In some embodiments, see Figure 4 , Figure 5 , Figure 6 The body 42 includes a first inner wall 401, and the first connecting portion 41 and the second connecting portion 43 include a second inner wall 402. The first inner wall 401 and the second inner wall 402 intersect. Exemplarily, the first inner wall 401 is spaced apart from and opposite to the first stator 51 and the second stator 52 in the radial Y direction, the second inner wall 402 of the first connecting portion 41 is spaced apart from and opposite to the first stator 51 in the axial X direction, and the second inner wall 402 of the second connecting portion 43 is spaced apart from and opposite to the second stator 52 in the axial X direction.

[0053] For example, the first inner wall 401 and the second inner wall 402 are perpendicular, that is, the included angle α between the first inner wall 401 and the second inner wall 402 is 90 degrees. It can be understood that the embodiments of this application do not limit the included angle α between the first inner wall 401 and the second inner wall 402, for example, it can be 60 degrees, 72 degrees, 80.5 degrees, 95 degrees, 106 degrees, etc.

[0054] In some embodiments, see Figure 4 , Figure 5 , Figure 6 The first inner wall 401 and the second inner wall 402 include an insulating layer, or the first inner wall 401 and the second inner wall 402 are made of insulating material. Using the above technical solution, it is possible to further compress the size of the motor in the radial Y direction. For example, along the radial Y direction, the body 42 can be positioned close to the stator assembly 50 without worrying about problems such as insufficient electrical clearance due to the close proximity of the coil and the housing 40, thus avoiding short circuits or leakage. It is understood that electrical clearance is the shortest spatial distance measured between two conductive components or between a conductive component and the protective interface of the equipment. The aforementioned insulating layer or insulating material includes, but is not limited to, polyester varnish, epoxy resin, etc.

[0055] In some embodiments, see Figure 4 , Figure 5 , Figure 6 The main body 42 includes a first outer wall 403, and the first connecting part 41 and the second connecting part 43 include a second outer wall 404. The first outer wall 403 and the second outer wall 404 are connected. The first outer wall 403 and the first inner wall 401 are disposed opposite each other on the main body 42 in the radial Y direction. In the axial direction X, the first outer wall 403 is flush with the second outer wall 404, the outer wall of the top cover 20, and the outer wall of the bottom cover 30. That is, neither the first outer wall 403 nor the second outer wall 404 includes the portion that protrudes outward in the radial Y direction. The projections of the first outer wall 403 and the second outer wall 404 in the axial direction X are both circular and coincident with each other. The first outer wall 403 and the second outer wall 404 will not be higher than the top cover 20 and the bottom cover 30, which enables the motor to have a compact structure in the radial Y direction.

[0056] In some embodiments, see Figure 4 , Figure 5 , Figure 6 The first connecting portion 41 includes a first protrusion 411 extending inward from one end of the body 42, and the second connecting portion 43 includes a second protrusion 431 extending inward from the other end of the body 42, i.e., the end of the body 42 (e.g., Figure 6 (As shown by the dashed line c) A first protrusion 411 and a second protrusion 431 are provided. The first protrusion 411 is detachably connected to the top cover 20, and the second protrusion 431 is detachably connected to the bottom cover 30. Exemplarily, the top cover 20 includes a first step 21, and the bottom cover 30 includes a second step 31. Along the radial direction Y, one end of the first protrusion 411 is located on the body 42, and the other end abuts against the first step 21. The inner wall of the first step 21 and the second inner wall 402 of the first protrusion 411 are flush in the radial direction Y. One end of the second protrusion 431 is located on the body 42, and the other end abuts against the second step 31. The inner wall of the second step 31 and the second inner wall 402 of the second protrusion 431 are flush in the radial direction Y. Exemplarily, along the axial direction X, the first stator 51 is spaced apart from the first protrusion 411, and the second stator 52 is spaced apart from the second protrusion 431. Exemplarily, the body 42, the first protrusion 411, and the second protrusion 431 are all annularly arranged.

[0057] In some embodiments, see Figure 5 , Figure 6 , Figure 7 Along the axial direction X, the second outer wall 412 of the first protrusion 411 is fitted to the top cover 20, and the first protrusion 411 is located between the top cover 20 and the stator assembly 50. The second outer wall 432 of the second protrusion 431 is fitted to the bottom cover 30, and the second protrusion 431 is located between the bottom cover 30 and the stator assembly 50. The first protrusion 411 and the second protrusion 431 are spaced apart from the stator assembly 50 along the axial direction X.

[0058] In some embodiments, see Figure 5 , Figure 6 , Figure 7 The motor includes a first connector 81 and a second connector 82. Along the axial direction X, a first protrusion 411 includes a first connecting hole 4111, and a top cover 20 includes a second connecting hole 201. The first connector 81 passes through the first connecting hole 4111 and the second connecting hole 201 sequentially along the axial direction X. Along the axial direction X, a second protrusion 431 includes a third connecting hole 4311, and a bottom cover 30 includes a fourth connecting hole 301. The second connector 82 passes through the third connecting hole 4311 and the fourth connecting hole 301 sequentially along the axial direction X. Exemplarily, both the first connector 81 and the second connector 82 include screws. It is understood that the embodiments of this application do not limit the type of the first connector 81 and the second connector 82; for example, they can also be bolts, etc.

[0059] In some embodiments, the present application does not limit the number of the first connector 81, the second connector 82, the first connecting hole 4111, the second connecting hole 201, the third connecting hole 4311, and the fourth connecting hole 301. For example, along the circumferential direction R, the top cover 20 is provided with four second connecting holes 201 at intervals. Correspondingly, the first protrusion 411 includes four first connecting holes 4111 on the circumferential direction R. Each first connecting hole 4111 corresponds one-to-one with each second connecting hole 201, and the four connectors are respectively inserted into the four first connecting holes 4111 by the four second connecting holes 201. Exemplarily, the first connecting hole 4111, the second connecting hole 201, the third connecting hole 4311, and the fourth connecting hole 301 are threaded holes.

[0060] In some embodiments, see Figure 5 , Figure 6 , Figure 7 and combined Figure 3 Along the radial direction Y, the housing 40 includes a first portion 44 and a second portion 45. Both the first portion 44 and the second portion 45 include a body 42, a first protrusion 411, and a second protrusion 431. The first portion 44 and the second portion 45 are joined together in the circumferential direction R. In some embodiments, the housing 40 is divided into two halves. Along the circumferential direction R, the first portion 44 includes a first end 441 and a second end 442, and the second portion 45 includes a third end 451 and a fourth end 452. The first end 441 and the third end 451 are connected, and the second end 442 and the fourth end 452 are spaced apart in the circumferential direction R. The second end 442, the fourth end 452, the top cover 20, and the bottom cover 30 together form a wiring groove 90, which facilitates the user to lead out the coil of the stator assembly, and allows for convenient observation and repair through the wiring groove when the coil malfunctions. For example, the first end 441 and the third end 451 are fitted together, and along the circumferential direction R, the first outer wall 403 of the first part 44 and the first outer wall 403 of the second part 45 are flush.

[0061] For example, the first stator 51 includes a first connecting line 512, and the second stator 52 includes a second connecting line 522. Both the first connecting line 512 and the second connecting line 522 are three-phase (e.g., U, V, W three-phase) connecting lines. Along the axial direction X, the first connecting line 512 and the second connecting line 522 are parallel to each other and both pass through the wire hole 32 provided on the bottom cover 30 for connection with external electrical components. In this way, the wiring of the motor can be made more organized.

[0062] In some embodiments, see Figure 5 , Figure 6 , Figure 7The first part 44 includes a first through hole 443, which is located in the body 42 of the first part 44 for assembling and disassembling the first part 44. The second part 45 includes a second through hole 453, which is located in the body 42 of the second part 45 for assembling and disassembling the second part 45. Exemplarily, the first through hole 443 is located at the second end 442, and the second through hole 453 is located at the fourth end 452. Along the circumferential direction R, a wiring groove 90 is located between the first through hole 443 and the second through hole 453. By providing the first through hole 443 and the second through hole 453, it is convenient for the user to insert their hand into the first through hole 443 to install or remove the first part 44 from the motor, and convenient for the user to insert their hand into the second through hole 453 to install or remove the second part 45 from the motor, thus improving assembly and disassembly efficiency.

[0063] For example, the first through hole 443 and the second through hole 453 are arranged in a rounded rectangular shape to avoid sharp corners from scratching people's hands. It is understood that the shapes of the first through hole 443 and the second through hole 453 are not limited in this embodiment; for example, they can also be rectangles, circles, etc. Furthermore, the number of the first through hole 443 and the second through hole 453 is not limited in this embodiment; for example, there can be 2, 3, 4, 5, 6, etc.

[0064] See Figure 6 , Figure 7 , Figure 8 The top cover 20 and the first stator 51 are connected to form the first stator assembly, and the bottom cover 30 and the second stator 52 are connected to form the second stator assembly. During assembly, the first stator 51 and the top cover 20 are first installed on the rotating shaft 70 in sequence, so that the first stator 51 is positioned between the top cover 20 and the rotor 60 in the axial direction X. Then, the first stator assembly and the rotor assembly (including the rotating shaft 70 and the rotor 60) are installed on the stand (not shown in the figure). The stand is a tooling device used to fix and position the components to ensure that the stator and rotor are precisely aligned in the axial and radial directions.

[0065] The first stator assembly and the second stator assembly are axially aligned and assembled on the test bench. After being assembled to a fixed position, the first part 44 and the second part 45 are inserted from both sides of the radial Y direction between the top cover 20 and the bottom cover 30 and mated together. Then, the housing 40 is connected to the top cover 20 and the bottom cover 30 through the first connector 81 and the second connector 82.

[0066] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electric machine characterized in that, include: Top cover, used for connection with the stator assembly; A bottom cover, along the axial direction, wherein the top cover and the bottom cover are spaced apart, and the bottom cover is used to connect to the stator assembly; A housing is arranged circumferentially around the stator assembly and the rotor. The housing includes a first connecting portion, a body, and a second connecting portion. Along the axial direction, the first connecting portion and the second connecting portion are spaced apart at both ends of the body. The first connecting portion is detachably connected to the top cover, and the second connecting portion is detachably connected to the bottom cover. The first connecting portion and the stator assembly are spaced apart and opposite to each other in the axial direction, and the second connecting portion is spaced apart and opposite to the stator assembly in the axial direction.

2. The electric machine of claim 1, wherein, The body includes a first outer wall, the first connecting portion and the second connecting portion include a second outer wall, the first outer wall and the second outer wall are connected, and along the axial direction, the first outer wall is flush with the second outer wall, the outer wall of the top cover and the outer wall of the bottom cover.

3. The electric machine of claim 2, wherein, The body includes a first inner wall, and the first outer wall and the first inner wall are radially opposite to each other on both sides of the body. The first connecting portion and the second connecting portion both include a second inner wall. The first inner wall and the second inner wall intersect each other, and the second inner wall is axially spaced from and opposite to the stator assembly. The first inner wall and the second inner wall include an insulating layer, or the first inner wall and the second inner wall are made of an insulating material.

4. The electric machine of claim 3, wherein, The first connecting portion includes a first protrusion extending inward from one end of the body, and the second connecting portion includes a second protrusion extending inward from the other end of the body. The first protrusion is detachably connected to the top cover, and the second protrusion is detachably connected to the bottom cover.

5. The electric machine of claim 4, wherein, The main body, the first protrusion, and the second protrusion are all annular.

6. The electric machine of claim 4, wherein, Along the axial direction, the first protrusion is fitted to the top cover and is located between the top cover and the stator assembly. The second protrusion is fitted to the bottom cover and is located between the bottom cover and the stator assembly. The first protrusion and the second protrusion are spaced apart from and opposite to the stator assembly along the axial direction.

7. The electric machine of claim 4, wherein, It includes a first connector and a second connector. Along the axial direction, the first protrusion includes a first connecting hole, and the top cover includes a second connecting hole. The first connector passes through the first connecting hole and the second connecting hole in sequence along the axial direction. Along the axial direction, the second protrusion includes a third connecting hole, the bottom cover includes a fourth connecting hole, and the second connector passes through the third connecting hole and the fourth connecting hole in sequence along the axial direction.

8. The electric machine of claim 4, wherein, Along the radial direction, the housing includes a first portion and a second portion, both of which include the body, the first protrusion, and the second protrusion, and the first portion and the second portion are mated in the circumferential direction.

9. The electric machine of claim 8, wherein, Along the circumferential direction, one end of the first part and one end of the second part are connected, and the other end of the first part and the other end of the second part are spaced apart. The other end of the first part, the other end of the second part, the top cover and the bottom cover together form a wiring groove.

10. The electric machine of claim 8, wherein, The first part includes a first through hole, which is disposed in the body of the first part for assembling and disassembling the first part. The second part includes a second through hole, which is disposed in the body of the second part for assembling and disassembling the second part.

11. The electric machine of claim 4, wherein, The stator assembly includes a first stator and a second stator. Along the axial direction, the rotor is disposed between the first stator and the second stator. The first stator is disposed between the rotor and the top cover, and the second stator is disposed between the rotor and the bottom cover. Along the axial direction, the first stator is spaced apart from the first protrusion, and the second stator is spaced apart from the second protrusion.

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