Axial flux motor and vehicle

Abstract

The invention relates to an axial magnetic flux motor and a vehicle, the axial magnetic flux motor comprises a stator assembly, a motor shell and an end plate, the stator assembly comprises stator teeth, the motor shell comprises a shell body, the shell body is arranged to be annular, at least one end of the shell body in the axis direction of the motor shell is an open end, the stator assembly is assembled in the shell body, the end plate covers the stator assembly, and the end plate covers the stator assembly. The end plate comprises a plate body and a pole shoe piece, and the pole shoe piece is arranged on the plate body and connected with the stator teeth. According to the end plate, the pole shoe parts are arranged on the plate body, and the pole shoe parts and the plate body are combined to form an integral structure, so that when the plate body is connected with a motor shell, the pole shoe parts and stator teeth can be assembled at the same time, assembly of two structures is completed through one-time assembly operation, and the assembly efficiency is improved.

Description

Technical Field

[0001] This disclosure relates to the field of motor manufacturing technology, and more particularly to an axial flux motor and a vehicle. Background Technology

[0002] In related technologies, the end plates and pole shoes of axial flux motors are usually separate components, which are assembled independently, resulting in multiple assembly steps and complex operations. Summary of the Invention

[0003] The purpose of this disclosure is to provide an axial flux motor and vehicle to solve the problems in the aforementioned related technologies.

[0004] To achieve the above objectives, one aspect of this disclosure provides an axial flux motor, comprising:

[0005] A stator assembly, the stator assembly including stator teeth; The motor housing includes a housing, the housing being annular, and at least one end of the housing being open in the axial direction of the motor housing, and the stator assembly being assembled inside the housing; An end plate covers the stator assembly. The end plate includes a plate body and pole shoes. The pole shoes are disposed on the plate body and connected to the stator teeth.

[0006] In the above technical solution, by incorporating pole shoes on the plate body and integrating them with the plate body into a single structure, the pole shoes can be simultaneously assembled with the stator teeth during end plate assembly, achieving assembly of two structures in a single operation and improving assembly efficiency. The pole shoes are connected to the stator teeth of the stator assembly, ensuring their function. The pole shoes suppress magnetic harmonics caused by stator tooth spacing, weaken the impact of stator tooth spacing, reduce torque and torque pulsation, and thus reduce AC losses. Furthermore, the integrated design of the pole shoes and plate body reduces the number of independent components, effectively simplifying assembly steps, achieving a compact structural layout, and ensuring stable clamping of the end plate onto the stator assembly. Additionally, due to the integrated design of the pole shoes and plate body, the structural strength between them is high, allowing for mutual torsional transmission. Thus, the rotational force borne by the stator teeth can be transmitted to the plate body through the pole shoes, thereby limiting the rotation of the stator teeth.

[0007] In some possible implementations, the plate is provided with a connecting portion that is connected to the housing, and the plate is used to receive the counter-torque of the stator assembly to limit the rotation of the stator assembly relative to the housing.

[0008] This configuration allows for quick assembly and disassembly of the plate and motor housing. The end plate can receive the reverse torque of the stator assembly and transmit it to the motor housing, preventing the stator assembly from rotating relative to the housing. Since the reverse torque is transmitted through the mechanical connection between the end plate and the motor housing, there is no need to rely on potting compound to fix the stator assembly. This avoids the material costs, process complexity, and heat dissipation limitations associated with potting processes, thereby simplifying the manufacturing process, improving assembly efficiency, and facilitating the maintenance and lightweight design of the motor.

[0009] In some possible implementations, the connecting portion is located near the circumferential edge of the plate, and the number of the connecting portions is multiple and they are distributed in a ring-shaped interval around the axis of the motor housing; The housing has at least one end in the axial direction of the motor housing with a plurality of circumferentially spaced assembly parts, the connecting part corresponds to the assembly part, the plate is connected to the housing through the cooperation of the connecting part and the assembly part, and the plate covers the open end.

[0010] By setting an assembly part on the motor housing, and arranging the assembly part and the connecting part of the plate body accordingly, it can be ensured that the connection between the plate body and the housing is evenly stressed, effectively avoiding local stress concentration, reducing the risk of deformation and loosening, improving the stability of the overall structure, and facilitating subsequent disassembly and maintenance.

[0011] In some possible implementations, the plate has a first surface and a second surface disposed opposite to each other in the axial direction of the motor housing, the first surface facing the stator assembly, and the pole shoe being located on the first surface; This design facilitates the integration of the pole shoe with the plate and maintains connection with the stator teeth.

[0012] In some possible implementations, the pole shoe is integrated into or embedded in the plate body; The first surface has a receiving portion, and the receiving portion has an opening on the first surface, and the pole shoe is at least partially embedded in the receiving portion.

[0013] With this configuration, the housing can cover and support the pole shoe components, which facilitates the integration of the plate and the pole shoe components and the stability of their connection, improves the structural strength and vibration resistance of the connection, reduces the axial space occupied, reduces the size, and improves the compactness of the entire motor. In addition, the rotational force borne by the stator teeth can be transmitted to the plate through the pole shoe components to limit the rotation of the stator teeth.

[0014] In some possible implementations, the receiving portion is provided with a first limiting portion, and the pole shoe is provided with a second limiting portion, the cooperation of the first limiting portion and the second limiting portion being to at least restrict the movement of the pole shoe in the axial direction of the motor housing.

[0015] This configuration ensures a stable connection between the pole shoe and the plate, preventing relative displacement between them along the axial direction of the end plate.

[0016] In some possible implementations, the first limiting part is disposed on the inner sidewall of the receiving part, and the second limiting part is disposed on the side of the pole shoe in the radial direction of the motor housing; In this configuration, one of the first limiting part and the second limiting part is configured as a protrusion, and the other is configured as a slot, wherein the protrusion is engaged in the slot.

[0017] This design prevents the pole shoe from axially loosening after assembly.

[0018] In some possible implementations, the pole shoe is provided with the second limiting portion at both ends of the motor housing in the radial direction.

[0019] This configuration further enhances the stability of the pole shoe components.

[0020] In some possible implementations, the pole piece is embedded within the receiving portion, and the exposed end of the pole piece through the opening is flush with the first surface.

[0021] This design avoids interference caused by protruding structures, further reduces the size and space occupied in the axial direction, and improves compactness.

[0022] In some possible implementations, the receiving portion includes a receiving groove formed on the first surface or a through hole penetrating the plate.

[0023] This design facilitates the insertion of the pole piece into the receiving part.

[0024] In some possible implementations, the end plate further includes a reinforcing plate, which is at least partially disposed in the area of ​​the plate body where the pole shoe is disposed.

[0025] This design ensures that the structural strength of the area where the pole piece is located is enhanced.

[0026] In some possible implementations, the reinforcing plate is parallel to the plate body; In this configuration, one side of the reinforcing plate is connected to the surface of the second surface; or, At least a portion of the reinforcing plate is embedded within the plate body.

[0027] This design reduces the thickness of the plate while enhancing the overall structural strength of the end plate, thereby increasing the air gap between the stator assembly and the rotor assembly.

[0028] In some possible implementations, the projection of the reinforcing plate along the axial direction of the motor housing is set as a first projection; The plate body includes a first plate portion and a second plate portion. The first plate portion is integrated with the pole shoe member. The projection of the first plate portion along the axial direction of the motor housing is set as a second projection. The area of ​​the first projection is greater than or equal to the area of ​​the second projection.

[0029] This arrangement ensures that the reinforcing plate covers at least the area of ​​the plate where the pole piece is located, guaranteeing concentrated reinforcement of the structural strength and providing a sealing effect.

[0030] In some possible implementations, the pole shoe, the reinforcing plate, and the plate body are molded into a single unit using an injection molding process.

[0031] This design facilitates manufacturing and ensures the structural strength between the pole piece, reinforcing plate, and plate body.

[0032] In some possible implementations, the pole shoe includes a ring body, the plate body is provided with a receiving portion, the ring body is connected to the inner sidewall of the receiving portion, and the ring body is sleeved on the stator tooth so that a portion of the stator tooth can be placed in the ring body and in the receiving portion.

[0033] This design simplifies the structure of the pole shoe components and reduces manufacturing costs.

[0034] In some possible implementations, the pole shoe includes a layer plate and a ring body, the ring body being sleeved on the layer plate, the ring body and the layer plate forming a groove for accommodating a portion of the stator tooth, and the ring body being sleeved on a portion of the stator tooth.

[0035] With this configuration, the ring can be fitted onto the stator teeth and cover the sides of the stator teeth, further reducing magnetic field interference between adjacent stator teeth and guiding the magnetic field direction along the axis. The layer plate contacts the assembly surface of the stator teeth, thereby placing a portion of the stator teeth of the stator assembly in the groove to ensure the connection between the two. In addition, the layer plate can bear the counter-torque of the stator teeth.

[0036] In some possible implementations, the plate is provided with a receiving portion, the ring is connected to the inner sidewall of the receiving portion, and the layer is located within the receiving portion so that a portion of the stator teeth is placed within the receiving portion.

[0037] With this configuration, a portion of the stator teeth of the stator assembly is placed within the receiving section, enabling torsion transmission. Thus, the force transmission through the layer plates and the plate body restricts the rotation of the stator teeth of the stator assembly, and can withstand the counter-torque generated by the rotor rotation, ensuring the stability of the stator teeth.

[0038] In some possible implementations, the number of stator teeth is multiple and they are spaced apart around the axis of the motor housing, with the multiple stator teeth located in the same radial plane; The number of pole shoes on one end plate is multiple, and the multiple pole shoes are distributed at intervals around the axis of the motor housing, and the pole shoes correspond to the stator teeth.

[0039] This configuration ensures a uniform distribution of the magnetic field along the axial direction, effectively reducing local magnetic saturation caused by uneven magnetic flux density. This helps ensure the symmetry of the magnetic circuit and the electromagnetic conversion efficiency of the motor, thereby guaranteeing the stability and reliability of motor operation.

[0040] In some possible implementations, the stator assembly further includes a coil winding wound around the stator teeth; The stator assembly further includes an insulating component, which is disposed on the side of the stator tooth in the radial and circumferential directions of the motor housing, and is disposed between the corresponding stator tooth and the corresponding coil winding.

[0041] This design provides insulation, preventing electrical conductivity and short circuits between the stator block and the coil windings, and also avoiding problems such as high-voltage breakdown.

[0042] In some possible implementations, in the axial direction of the motor housing, the edge of the insulating element and the corresponding stator tooth have a gap between them on the end face of the motor housing in the axial direction.

[0043] This design facilitates the assembly of the pole shoe components and avoids interference.

[0044] In some possible implementations, the insulating element at least partially covers the end face of the stator teeth in the axial direction of the motor housing.

[0045] This design provides structural protection for the stator teeth, such as through insulation, which reduces the risk of rubbing, short circuits, and discharges caused by operating vibrations, thus ensuring the safety of the coil windings.

[0046] In some possible implementations, the insulating element at least partially covers the end faces of the stator teeth and the pole shoes in the axial direction of the motor housing.

[0047] This configuration expands the insulation range and enhances the insulation effect.

[0048] In some possible implementations, the housing has open ends at both ends in the axial direction of the motor housing, and there are two end plates, which are respectively connected to the two ends of the housing in the axial direction of the motor housing. The pole shoes of the two end plates are respectively connected to the two ends of the stator teeth in the axial direction of the motor housing. The stator assembly further includes a coil winding wound on the stator tooth, the coil winding being located between two pole shoes of the corresponding stator tooth.

[0049] With this configuration, the pole shoes of the two end plates can be reliably connected to both ends of the stator teeth. The pole shoes on both sides of the stator teeth can generate magnetic permeability harmonics that are suppressed by the stator tooth spacing, weaken the influence of the spacing between the stator teeth, reduce torque and torque pulsation, and thus reduce AC losses.

[0050] In some possible implementations, the winding direction of the coil winding includes forward winding and reverse winding.

[0051] This configuration facilitates the rotation of the rotor assembly.

[0052] In some possible implementations, the winding directions of the coil windings on two adjacent stator teeth are opposite.

[0053] This configuration facilitates the rotation of the rotor assembly.

[0054] In some possible implementations, the stator assembly further includes a sleeve, and the number of stator teeth is plurality of the stator teeth, which surround the sleeve and are arranged coaxially with the sleeve, the sleeve being used for the passage of a rotating shaft.

[0055] With this configuration, the inside of the sleeve is used for the shaft to pass through, and the outer wall of the sleeve can provide a sealing and isolation effect.

[0056] In some possible implementations, the inner wall of the motor housing is provided with a positioning element for positioning the stator assembly and for receiving the counter-torque of the stator assembly to limit the rotation of the stator assembly relative to the housing.

[0057] This configuration allows for the positioning of the stator assembly and also restricts the rotation of the stator assembly relative to the housing.

[0058] In some possible implementations, the positioning element is integrally formed with the housing; or, The inner ring wall of the housing is provided with a mounting portion, and at least a portion of the positioning member is connected to the mounting portion.

[0059] With this configuration, the integrated design can enhance the connection strength between the positioning component and the housing, while reducing manufacturing and assembly costs. The mounting section provides installation conditions for the positioning component, which can be installed after the housing is machined to reduce the machining difficulty of the housing. Furthermore, the positioning component can be replaced or adjusted according to different stator assemblies to improve versatility and adaptability.

[0060] In some possible implementations, the number of stator teeth is multiple; The positioning component includes a body and a positioning part, the positioning part being integrally formed with the body, the positioning part being disposed between two adjacent stator teeth, and in the radial direction of the motor housing, a portion of the body being located on one side of the corresponding two adjacent stator teeth.

[0061] With this design, the integrated design of the positioning part and the body can improve the structural strength and stability. The body is radially offset on the tooth side of the stator teeth, so that the positioning part can be located between two adjacent stator teeth, avoiding the body occupying the space between two adjacent positioning teeth. The positioning part can also provide a clear limit reference for the stator assembly, realize automatic guidance and positioning during assembly, and prevent the stator assembly from rotating.

[0062] In some possible implementations, the positioning part includes a positioning latch, which is configured as a protrusion formed on the side of the body opposite to the housing; Along the direction away from the main body, the width of the positioning buckle in the radial direction of the motor housing gradually decreases, and the end of the positioning buckle away from the main body is set as an arc end.

[0063] With this design, the positioning buckle can be easily engaged between two adjacent stator teeth, occupying little space and not affecting the arrangement of the stator teeth. It also allows the positioning buckle to reliably limit the stator assembly while reserving enough space between the motor housing and the stator assembly to accommodate the coil winding. The width of the positioning buckle gradually decreases in the circumferential direction, which facilitates engagement between two adjacent stator teeth.

[0064] In some possible implementations, the body is provided with a clearance portion for avoiding certain components of the stator assembly.

[0065] By setting up such a clearance section, the coil winding can be cleared, which facilitates the arrangement and routing of the enameled wire and avoids interference between the positioning parts and some components of the stator assembly.

[0066] In some possible implementations, the axial flux motor further includes a rotor assembly and a cover plate, the rotor assembly being disposed on the side of the end plate opposite to the stator assembly in the axial direction of the motor housing, and the cover plate covering the rotor assembly and connected to the housing.

[0067] With this configuration, the connection between the cover plate and the housing provides reliable axial positioning support for the rotor assembly, ensuring the stability of the rotor during high-speed operation, reducing vibration and noise, and providing effective structural protection for the rotor assembly.

[0068] A second aspect of this disclosure is to provide a vehicle including the aforementioned axial flux motor.

[0069] The above technical solutions improve the reliability of vehicle operation.

[0070] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0071] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an exploded view of a stator assembly according to one embodiment of the present disclosure; Figure 2 This is a schematic diagram of the internal structure of a stator assembly according to one embodiment of the present disclosure, wherein one end plate has been removed; Figure 3 This is a perspective view of a stator assembly according to one embodiment of the present disclosure; Figure 4 This is an exploded view of the stator teeth and insulating components according to one embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of an end plate according to one embodiment of the present disclosure; Figure 6 yes Figure 5 A cross-sectional view of the AA plane; Figure 7 yes Figure 6 An enlarged view of position E in the middle; Figure 8 This is a schematic diagram of the end plate according to another embodiment of the present disclosure; Figure 9 This is a schematic diagram of the structure of a plate body according to one embodiment of the present disclosure; Figure 10 yes Figure 9 A sectional view at position B in the middle; Figure 11 This is a schematic diagram of the structure of an electrode shoe according to one embodiment of the present disclosure; Figure 12 This is a three-dimensional schematic diagram of the mating relationship between the end plate and the stator assembly according to one embodiment of the present disclosure; Figure 13 This is a structural schematic diagram of the fit between the end plate and the stator assembly according to one embodiment of the present disclosure; Figure 14 yes Figure 13 A sectional view of the C-plane; Figure 15 This is a structural schematic diagram of the fit between the end plate and the stator assembly according to another embodiment of the present disclosure; Figure 16 yes Figure 15 A cross-sectional view of the DD plane; Figure 17 This is a schematic diagram of the internal structure of the stator assembly according to another embodiment of the present disclosure; Figure 18 This is a structural schematic diagram of the motor housing according to another embodiment of the present disclosure from one perspective. Figure 19 This is a structural schematic diagram of the motor housing according to another embodiment of the present disclosure from another perspective; Figure 20 yes Figure 19 Enlarged diagram of position F in the middle; Figure 21 yes Figure 19 Enlarged diagram of position G in the middle; Figure 22 This is a schematic diagram of the internal structure of the stator assembly according to another embodiment of the present disclosure; Figure 23 This is a schematic diagram of the structure of a motor housing according to another embodiment of this disclosure; Figure 24 This is a schematic diagram of the positioning element according to another embodiment of the present disclosure; Figure 25 This is a schematic diagram of the fit between the stator teeth and the insulating component in one embodiment of the present disclosure.

[0072] Explanation of reference numerals in the attached figures 1. Stator assembly; 11. Stator teeth; 2. Motor housing; 21. Housing; 211. Mounting part; 212. Assembly part; 22. Positioning component; 221. Body; 2211. Clearance part; 2212. First plate; 2213. Second plate; 2214. Third plate; 2215. Fourth plate; 2216. Fifth plate; 2217. First part; 2218. Second part; 222. Positioning part; 2221. Positioning buckle; 22211. Arc-shaped end; 3. End plate; 31. Plate body; 311. First surface; 312. Second surface; 313. Receiving part; 314. Connecting part; 315. Connecting hole; 32. Pole shoe component; 321. Ring body; 322. Layer plate; 33. Reinforcing plate; 34. Sleeve; 4. Coil winding; 5. First limiting part; 6. Second limiting part; 7. Insulating components. Detailed Implementation

[0073] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0074] In this disclosure, unless otherwise stated, "inner" and "outer" refer to the inner and outer parts of the relevant components. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0075] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be 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 disclosure according to the specific circumstances.

[0076] An axial flux motor is a motor in which the main magnetic field is along the axis of rotation. It features high torque, high efficiency, and compact structure, and has higher power density and torque density compared to radial flux motors. The stator assembly of an axial flux motor is assembled inside the motor housing and requires end plates for sealing, while pole shoes are installed on the stator teeth.

[0077] In related technologies, axial flux motors typically use potting to fix the stator assembly and transmit torque. However, the potting compound is prone to cracking and peeling under high and low temperature and high power conditions, which affects the stability of the stator assembly.

[0078] like Figures 1 to 25 As shown, in a first aspect, an axial flux motor is provided, including a stator assembly 1, a motor housing 2, and an end plate 3. The stator assembly 1 includes stator teeth 11, and the motor housing 2 includes a housing 21. The housing 21 is annular, and at least one end of the housing 21 in the axial direction of the motor housing 2 is an open end. The stator assembly 1 is assembled inside the housing 21, and the end plate 3 covers the stator assembly 1. The end plate 3 includes a plate body 31 and a pole shoe 32. The pole shoe 32 is disposed on the plate body 31 and is connected to the stator teeth 11.

[0079] In the above technical solution, by providing pole shoe components 32 on the plate 31, and combining the pole shoe components 32 and the plate 31 into a single integrated structure, the pole shoe components 32 can be simultaneously assembled with the stator teeth 11 during the assembly of the end plate 3, achieving the assembly of two structures in a single operation and improving assembly efficiency. The pole shoe components 32 are connected to the stator teeth 11 of the stator assembly 1, ensuring the function of the pole shoe components 32. The placement of the pole shoe components 32 can suppress magnetic harmonics caused by the spacing of the stator teeth 11, weaken the influence of the spacing between the stator teeth 11, reduce torque and torque pulsation, and thus reduce AC losses. Furthermore, the integrated design of the pole shoe components 32 and the plate 31 reduces the number of independent parts, effectively simplifies the assembly steps, achieves a compact structural arrangement, and ensures a stable pressing effect of the end plate 3 on the stator assembly 1. In addition, since the pole shoe 32 and the plate 31 are integrally set, the two have high structural strength and can transmit torsion to each other. Thus, the rotational force borne by the stator teeth 11 can be transmitted to the plate 31 through the pole shoe 32 to limit the rotation of the stator teeth 11.

[0080] Optionally, at least one end of the housing 21 in the axial direction of the motor housing 2 is an open end. By designing the housing 21 as a ring structure with at least one open end, the stator assembly 1 can be assembled. In some examples, both ends of the housing 21 in the axial direction of the motor housing 2 are open ends, which facilitates the formation of a dual-rotor assembly layout, thereby improving assembly convenience and flexibility and effectively reducing the possibility of assembly interference.

[0081] Alternatively, in one embodiment of this disclosure, the housing 21 can be made of plastic or metal materials, such as aluminum. There are various materials that can be selected as needed.

[0082] Optionally, in one embodiment of this disclosure, the plate 31 is provided with a connecting part 314, which is connected to the housing 21. The plate 31 is used to bear the counter torque of the stator assembly 1 to limit the rotation of the stator assembly 1 relative to the housing 21, so that the housing 21 can be filled without potting compound.

[0083] The connection 314 between the housing 21 and the plate 31 allows for quick assembly and disassembly of the plate 31 and the motor housing 2. The end plate 3 can receive the reverse torque of the stator assembly 1 and transmit it to the housing 21. The housing 21, in turn, receives the reverse torque of the stator assembly 1, preventing rotation of the stator assembly 1 relative to the housing 21, thus ensuring the stability and reliability of the motor operation. Furthermore, since the reverse torque is transmitted through the mechanical connection between the end plate 3 and the motor housing 2, there is no need to rely on potting compound to fix the stator assembly, avoiding the material costs, process complexity, and heat dissipation limitations associated with potting processes. This simplifies the manufacturing process, improves assembly efficiency, and facilitates maintainability and lightweight design of the motor. Simultaneously, the end plate 3 can form a seal for the motor housing 2, allowing the motor housing 2 to achieve radial sealing of the stator assembly 1, thus providing protection and constraint for the stator assembly 1. Among them, the pole shoe 32 can serve as an intermediate force transmitter, so that the anti-torque of the stator assembly 1 can be transmitted to the plate 31 through the pole shoe 32.

[0084] Optionally, in one embodiment of this disclosure, the connecting portion 314 is located near the circumferential edge of the plate 31, and the number of connecting portions 314 is multiple and they are distributed in a ring-shaped interval around the axis of the motor housing 2. The housing 21 has at least one end in the axial direction of the motor housing 2 with multiple circumferentially spaced mounting portions 212. The connecting portions 314 correspond to the mounting portions 212, and the plate 31 is connected to the housing 21 through the cooperation of the connecting portions 314 and the mounting portions 212, with the plate 31 covering the open end. By providing mounting portions 212 on the motor housing 2, and arranging the mounting portions 212 corresponding to the connecting portions 314 of the plate 31, it is possible to ensure uniform stress distribution between the plate 31 and the housing 21, effectively avoiding local stress concentration, reducing the risk of deformation and loosening, improving the stability of the overall structure, and facilitating subsequent disassembly and maintenance. Simultaneously, the ring-shaped arrangement of the connecting portions 314 and the mounting portions 212 allows the plate 31 to close at least a portion of the open end of the housing 21. In some examples, the connecting part 314 can be configured as a threaded hole or a through hole, and the assembly part 212 can be configured as a through hole or a threaded hole corresponding to the connecting part 314. The plate 31 and the housing 21 are connected by bolts or screws. The connecting part 314 can be directly disposed on the plate 31, or a protrusion can be formed on the circumferential edge of the plate 31, and the connecting part 314 can be disposed on the protrusion.

[0085] Optionally, in one embodiment of this disclosure, the plate 31 has a first surface 311 and a second surface 312 disposed opposite to each other in the axial direction of the motor housing 2, the first surface 311 facing the stator assembly 1, and the pole shoe 32 located on the first surface 311. This allows the pole shoe 32 to be easily connected to the stator teeth 11 even after integration with the plate 31.

[0086] Optionally, in one embodiment of this disclosure, the pole piece 32 is integrated into or embedded in the plate 31. The pole piece 32 and the plate 31 can be integrally formed.

[0087] Optionally, in one embodiment of this disclosure, a receiving portion 313 is provided on the first surface 311. The receiving portion 313 has an opening formed on the first surface 311. The pole shoe 32 is at least partially embedded in the receiving portion 313. The side of the pole shoe 32 closest to the stator tooth 11 is exposed through the opening and connected to the stator tooth 11. By providing the receiving portion 313 on the first surface 311 of the plate 31, and by having the pole shoe 32 at least partially embedded in the receiving portion 313, the receiving portion 313 can at least partially cover and support the pole shoe 32. This facilitates the integration of the plate 31 and the pole shoe 32 and the stability of their connection, improves the structural strength and vibration resistance of the connection, reduces the risk of deformation of the pole shoe 32, reduces the axial space occupied, reduces the size, and improves the compactness of the entire motor. At the same time, the pole shoe 32 is partially exposed and in contact with the stator tooth 11, suppressing magnetic harmonics generated by the spacing of the stator tooth 11, and reducing torque pulsation and AC loss. In addition, the increased connection strength between plate 31 and pole shoe 32 can further increase the torque of the plate 31 under the rotational force on the stator teeth 11, thereby further restricting the rotation of the stator teeth 11.

[0088] Alternatively, in another embodiment of this disclosure, the pole piece 32 may be integrated onto the surface of the first surface 311 of the plate 31, that is, the pole piece 32 is not embedded in the plate 31. Of course, the pole piece 32 may be integrally formed with the plate 31.

[0089] Optionally, in one embodiment of this disclosure, the receiving portion 313 is provided with a first limiting portion 5, and the pole shoe 32 is provided with a second limiting portion 6. The cooperation of the first limiting portion 5 and the second limiting portion 6 at least restricts the movement of the pole shoe 32 in the axial direction of the motor housing 2. Through the cooperation of the first limiting portion 5 and the second limiting portion 6, the pole shoe 32 can be effectively prevented from shifting or loosening under axial pressure, vibration, or impact, ensuring a stable connection between the pole shoe 32 and the plate 31, so that the pole shoe 32 and the plate 31 will not have relative displacement in the axial direction of the motor housing 2, further improving the reliability and stability of the structure.

[0090] Optionally, in one embodiment of this disclosure, the first limiting part 5 is disposed on the inner side wall of the receiving part 313, and the second limiting part 6 is disposed on the side of the pole shoe 32 in the radial direction of the motor housing 2. The second limiting part 6 is used to fix the pole shoe 32 axially and prevent the pole shoe 32 from being displaced relative to the plate 31 in the axial direction of the motor housing 2.

[0091] Optionally, in one embodiment of this disclosure, one of the first limiting part 5 and the second limiting part 6 is configured as a protrusion, and the other is configured as a slot, with the protrusion engaging with the slot. By engaging the protrusion and the slot, locking and positioning of the pole shoe 32 can be achieved without significantly increasing the radial and axial dimensions.

[0092] In some examples, the first limiting part 5 of the receiving part 313 may be configured as a slot, and the second limiting part 6 of the pole shoe 32 may be configured as a protrusion; or, the first limiting part 5 of the receiving part 313 may be configured as a protrusion, and the second limiting part 6 of the pole shoe 32 may be configured as a slot.

[0093] Alternatively, in another embodiment of this disclosure, one of the first limiting part 5 and the second limiting part 6 may be configured as a positioning pin, and the other may be configured as a positioning groove; or, the first limiting part 5 may be configured as a dovetail groove, and the second limiting part 6 may be configured as a dovetail boss.

[0094] Optionally, in one embodiment of this disclosure, the pole shoe 32 is provided with second limiting portions 6 at both ends in the radial direction of the motor housing 2. By providing second limiting portions 6 at both ends of the pole shoe 32 in the radial direction, symmetrical limiting constraints can be formed on both sides, balancing the loads on both sides, avoiding local stress concentration, reducing the risk of deformation, and further improving the fixing stability of the pole shoe 32, preventing the pole shoe 32 from shifting or loosening, ensuring the stable connection between the pole shoe 32 and the plate 31, so that the pole shoe 32 and the plate 31 will not have relative displacement in the axial direction of the motor housing 2, avoiding torque pulsation and performance fluctuation caused by positional displacement.

[0095] Optionally, in one embodiment of this disclosure, the pole shoe 32 is fully embedded within the receiving portion 313, with one exposed end of the pole shoe 32 flush with the first surface 311. The fact that the pole shoe 32 is fully embedded in the receiving portion 313 and the exposed portion is flush with the first surface 311 avoids interference and stress concentration problems caused by protruding structures. The receiving portion 313 can limit and protect the pole shoe 32, further reducing its size and space occupation in the axial direction, resulting in a more compact overall structure and significantly improving assembly consistency. Furthermore, the fact that the pole shoe 32 is fully embedded within the receiving portion 313 also increases the connection strength between the pole shoe 32 and the plate 31, thereby improving torsional transmission.

[0096] Optionally, in one embodiment of this disclosure, the receiving portion 313 includes a receiving groove formed on the first surface 311 or a through hole penetrating the plate 31. The receiving groove or through hole can be selectively used to assemble the pole shoe 32, and this is not a limitation.

[0097] When the receiving portion 313 is configured as a receiving groove, it enables a sealing effect, thereby sealing the plate 31 and preventing coolant leakage from the connection between the plate 31 and the pole shoe 32. When the receiving portion 313 is configured as a through hole, the thickness of the plate 31 can be reduced, thereby further reducing the axial dimensions and space occupation, and improving compactness.

[0098] Optionally, in one embodiment of this disclosure, there are multiple pole shoes 32, which are distributed around the axis of the plate 31 at intervals. By providing multiple pole shoes 32, multiple stator teeth 11 can be adapted to each other. The multiple stator teeth 11 can be arranged in a spaced-out manner, with each pole shoe 32 fitted onto a corresponding stator tooth 11, which can reduce magnetic field interference between adjacent stator teeth 11. The arrangement of the pole shoes 32 can suppress magnetic permeability harmonics caused by the spaced arrangement of the stator teeth 11, weaken the influence of the spaced arrangement between the stator teeth 11, reduce torque and torque pulsation, and thus reduce AC losses. The space between adjacent stator teeth 11 can accommodate the coil winding 4, which can avoid interference problems and enable energization, thereby driving the rotor assembly to rotate.

[0099] Understandably, a coil winding 4 is wound on one stator tooth 11. The coil winding 4 extends radially along the stator assembly 1 and is wound on the stator tooth 11. The coil winding 4 can be in either a positive or negative configuration to achieve three-way interconnection. Different coil windings 4 are wound on different stator teeth 11. In some examples, the coil winding 4 uses enameled wire.

[0100] Optionally, in one embodiment of this disclosure, the end plate 3 further includes a reinforcing plate 33, which is at least partially disposed in the area of ​​the plate body 31 where the pole piece 32 is disposed. This ensures structural strength reinforcement in the area where the pole piece is disposed.

[0101] Optionally, in one embodiment of this disclosure, the reinforcing plate 33 is parallel to the plate body 31, and one side of the reinforcing plate 33 is connected to the surface of the second surface 312. Alternatively, the reinforcing plate 33 is parallel to the plate body 31, and at least a portion of the reinforcing plate 33 is embedded within the plate body 31. By providing the reinforcing plate 33, the thickness of the plate body 31 can be reduced, while the overall structural strength of the end plate 3 is enhanced, resulting in an increased air gap between the stator assembly 1 and the rotor assembly. Furthermore, the reinforcing plate 33 can better withstand radial electromagnetic forces and vibration impacts, reducing the risk of deformation.

[0102] Optionally, in one embodiment of this disclosure, the projection of the reinforcing plate 33 along the axial direction of the motor housing 2 is set as a first projection. The plate body 31 includes a first plate portion and a second plate portion. The first plate portion is integrated with the pole shoe member 32. The projection of the first plate portion along the axial direction of the motor housing 2 is set as a second projection, and the area of ​​the first projection is greater than or equal to the area of ​​the second projection. This allows the reinforcing plate 33 to at least cover the area of ​​the plate body 31 where the pole shoe member 32 is provided, ensuring concentrated reinforcement of structural strength. That is, the reinforcing plate 33 can completely cover the entire first plate portion or extend beyond the first plate portion and cover the second plate portion, so that the reinforcing plate 33 can completely cover the area of ​​the end plate 3 where the pole shoe member 32 is provided, reducing vibration and impact, and improving structural stability and assembly consistency. The second plate portion can be used to connect with the motor housing 2 and can be used to open a connection hole 315 for the shaft to pass through.

[0103] In addition, if the receiving part 313 is a through hole, the covering effect of the reinforcing plate 33 can also produce a sealing effect to prevent the leakage of the cooling medium.

[0104] Alternatively, in another embodiment of this disclosure, the reinforcing plate 33 covers the second surface 312 of the plate body 31, and the reinforcing plate 33 may also have holes for accommodating the pole shoe 32.

[0105] Alternatively, in another embodiment of this disclosure, the reinforcing plate 33 can completely cover the second surface 312 of the plate body 31. That is, the reinforcing plate 33 has the same area as the second surface 312 of the plate body 31, or the area of ​​the reinforcing plate 33 can be slightly smaller than the area of ​​the second surface 312 of the plate body 31.

[0106] In some examples, the reinforcing plate 33, pole shoe 32, and plate body 31 are injection molded into a single unit to further enhance structural strength and reduce the thickness of plate body 31. In some examples, the reinforcing plate 33 can be attached to the second surface 312 of plate body 31, thus reducing the thickness of plate body 31. This allows the end plate 3 with the reinforcing plate 33 attached to it to be thinner than the end plate 3 without the reinforcing plate 33 attached, enhancing structural strength while increasing the air gap between the stator assembly 1 and the rotor assembly. Alternatively, the reinforcing plate 33 can be embedded in plate body 31. In some examples, the reinforcing plate 33 can be fiberboard.

[0107] The shape and structure of the pole shoe 32 can be configured as needed. Optionally, in one embodiment of this disclosure, the pole shoe 32 includes a ring 321 with a receiving portion 313. The ring 321 is connected to the inner wall of the receiving portion 313, and the ring 321 is sleeved on the stator tooth 11 so that a portion of the stator tooth 11 can be placed inside the ring 321 and within the receiving portion 313. That is, the pole shoe 32 can be a hollow structure for sleeved on the stator tooth 11.

[0108] By securely mounting the stator teeth 11 with the ring body 321 and having a portion of the stator teeth 11 located within the receiving portion 313, the position of the pole shoe 32 in the radial and axial directions can be ensured. The ring body 321 covers the circumferential edge of the end face of the stator teeth 11, which can further reduce magnetic field interference between adjacent stator teeth 11, optimize the magnetic field distribution, guide the magnetic field direction along the axis, make the magnetic circuit more concentrated and continuous, and reduce magnetic reluctance and torque pulsation. In addition, the portion of the stator teeth 11 placed within the receiving portion 313 can realize torsion transmission, thereby restricting the rotation of the stator teeth 11 of the stator assembly 1 by the plate body 31. It should be noted that the stator teeth 11 can be placed within the receiving portion 313 or not; that is, the ring body 321 can protrude from the receiving portion 313 and connect with the stator teeth 11.

[0109] Optionally, in one embodiment of this disclosure, the pole shoe 32 includes a layer plate 322 and an annular body 321. The annular body 321 is sleeved on the layer plate 322, and the annular body 321 and the layer plate 322 together form a groove for accommodating a portion of the stator tooth 11. The annular body 321 can be sleeved on the stator tooth 11 and cover the side of the stator tooth 11, further reducing magnetic field interference between adjacent stator teeth 11 and guiding the magnetic field direction along the axis. The layer plate 322 contacts the end face of the stator tooth 11 in the axial direction of the motor housing 2, which can realize the torsion transmission function. Thus, the layer plate 322 can bear the counter-torque generated by the rotor rotation, ensuring the fixed stability of the stator tooth 11.

[0110] Optionally, in one embodiment of this disclosure, the plate 31 is provided with a receiving portion 313, the ring 321 is connected to the inner sidewall of the receiving portion 313, and the shelf 322 is located within the receiving portion 313, so that a portion of the stator teeth 11 is placed within the receiving portion 313. With a portion of the stator teeth 11 of the stator assembly 1 placed within the receiving portion 313, torque transmission can be achieved. Thus, the force transmission through the shelf 322 and the plate 31 can restrict the rotation of the stator teeth 11 of the stator assembly 1, and can withstand the counter-torque generated by the rotor rotation, ensuring the fixed stability of the stator teeth 11. It should be noted that the stator teeth 11 may or may not be placed within the receiving portion 313, and the ring 321 may protrude from the receiving portion 313 and connect with the stator teeth 11.

[0111] It is understandable that when the rotor assembly rotates, a counter-torque will be generated, which will act on the stator assembly 1 and affect the installation stability of the stator assembly 1. The shelf plate 322 is set between the plate body 31 and the stator teeth 11. Since the pole shoe 32 and the plate body 31 are integrated, they can transmit force, so the shelf plate 322 and the plate body 31 can bear the counter-torque. The shelf plate 322 is connected to the plate body 31 and can be fixed, thereby avoiding the counter-torque generated by the rotor rotation from affecting the stator.

[0112] The circumferential edge of the layer plate 322 can be connected to the inner ring wall of the ring body 321, thereby allowing the layer plate 322 to fill the internal space of the ring body 321. This facilitates the formation of a groove between the layer plate 322 and the ring body 321, increasing the area of ​​the layer plate 322 and improving the assembly connection area between the layer plate 322 and the stator teeth 11. Furthermore, after the layer plate 322 and the stator teeth 11 are connected surface to surface, the contact area between the two is increased, improving the anti-torque bearing effect and further enhancing the fixing stability of the stator assembly 1. In some examples, the layer plate 322 and the ring body 321 are integrally formed.

[0113] Optionally, in one embodiment of this disclosure, there are two end plates 3, which are disposed on both sides of the stator assembly 1 along the axial direction of the motor housing 2. Thus, both plates 31 are provided with pole shoes 32. When the two plates 31 are connected to the motor housing 2, the two pole shoes 32 are respectively connected to the two end faces of each stator tooth 11 along the axial direction of the motor housing 2. Furthermore, the two plates 31 can seal the motor housing 2 on both sides along its axial direction, preventing the cooling medium from flowing out.

[0114] Understandably, in the axial direction of the stator assembly 1, the stator teeth 11 have two opposing mounting surfaces. Each stator tooth 11 has an end plate 3 on its two mounting surfaces, and the pole shoes 32 of the two end plates 3 are connected to the corresponding stator teeth 11. The coil windings 4 of the corresponding stator teeth 11 are located between the two pole shoes 32. With this arrangement, the rotor assembly can be set on both sides of the stator assembly 1 in the axial direction, realizing a structure similar to a "sandwich". The pole shoes 32 on both sides of the stator teeth 11 can generate magnetic harmonics that are suppressed by the spacing of the stator teeth 11, weaken the influence of the spacing between the stator teeth 11, reduce torque and torque pulsation, and thus reduce AC losses.

[0115] Optionally, in one embodiment of this disclosure, the number of stator teeth 11 is multiple and they are spaced apart around the axis of the motor housing 2, with the multiple stator teeth 11 located on the same radial plane. The number of pole shoes 32 on an end plate 3 is multiple, and the multiple pole shoes 32 are spaced apart around the axis of the motor housing 2, with each pole shoe 32 corresponding to a stator tooth 11. By having multiple stator teeth 11 spaced apart around the axis of the motor housing 2, and simultaneously providing multiple corresponding pole shoes 32 on the end plate 3, a uniform distribution of the magnetic field in the axial direction can be achieved, thereby effectively reducing local magnetic saturation caused by uneven magnetic flux density. This helps ensure the symmetry of the magnetic circuit and the electromagnetic conversion efficiency of the motor, thereby ensuring the stability and reliability of motor operation.

[0116] Optionally, in one embodiment of this disclosure, the stator assembly 1 further includes a coil winding 4, which is wound around the stator teeth 11. The stator assembly 1 also includes an insulating member 7, which is disposed on the sides of the stator teeth 11 in the radial and circumferential directions of the motor housing 2. The insulating member 7 is disposed between the corresponding stator teeth 11 and the corresponding coil winding 4. By providing the insulating member 7 on the sides of the corresponding stator teeth 11 in the radial and circumferential directions of the stator assembly 1, insulation can be achieved between the insulating member 7 and the coil winding 4, preventing electrical conductivity and short circuits between the stator teeth 11 and the coil winding 4, and also preventing high-voltage breakdown and other problems that could affect both. In addition, the insulating member 7, sleeved on the stator teeth 11, can cover the stator teeth 11, preventing burrs or sharp angles on the stator teeth 11 from damaging the coil winding 4 and affecting its performance. In some examples, the insulating element 7 may be insulating paper, which is wound around the side of the stator teeth 11 in the radial direction of the stator assembly 1. Some insulating elements 7 may also have a certain degree of thermal conductivity to meet the requirements of heat transfer.

[0117] Optionally, in one embodiment of this disclosure, the edge of the insulating member 7 and the corresponding stator tooth 11 are spaced L apart in the axial direction of the motor housing 2. That is, in the axial direction of the motor housing 2, the edge of the insulating member 7 is slightly lower than the mounting surface of the stator tooth 11, thereby avoiding interference with the assembly of the pole shoe member 32.

[0118] Optionally, in one embodiment of this disclosure, the insulating member 7 at least partially covers the end face of the stator tooth 11 in the axial direction of the motor housing 2. The insulating member 7 can be bent towards the end face of the stator tooth 11 in the axial direction of the motor housing 2, so that the insulating member 7 at least partially covers the end face of the stator tooth 11 in the axial direction of the motor housing 2, thereby increasing the insulation range and improving the insulation effect.

[0119] Alternatively, in one embodiment of this disclosure, the insulating member 7 at least partially covers the end faces of the stator teeth 11 and the pole shoe members 32 in the axial direction of the motor housing 2.

[0120] In some examples, the edge of the insulating member 7 protrudes beyond the end face of the corresponding stator tooth 11 in the axial direction of the motor housing 2. That is, in the axial direction of the motor housing 2, the edge of the insulating member 7 is slightly higher than the mounting surface of the stator tooth 11, which can structurally form protection for the stator tooth 11, such as forming insulation isolation, etc., which can reduce the risk of rubbing, short circuit and discharge caused by operating vibration and ensure the safety of the coil winding 4.

[0121] Optionally, in one embodiment of this disclosure, the winding direction of the coil winding 4 includes forward winding and reverse winding.

[0122] Optionally, the winding directions of the coil windings 4 on two adjacent stator teeth 11 are opposite. This enables the creation of alternating magnetic fields with opposite directions, which facilitates the driving of the rotor assembly to rotate.

[0123] Optionally, in one embodiment of this disclosure, both ends of the housing 21 in the axial direction of the motor housing 2 are open ends. There are two end plates 3, each connected to both ends of the housing 21 in the axial direction of the motor housing 2. The pole shoes 32 of the two end plates 3 are respectively connected to both ends of the stator teeth 11 in the axial direction of the motor housing 2. The stator assembly 1 also includes a coil winding 4 wound around the stator teeth 11, located between the two pole shoes 32 of the corresponding stator teeth 11. The pole shoes 32 of the two end plates 3 can reliably connect to both ends of the stator teeth 11. The pole shoes 32 on both sides of the stator teeth 11 can generate magnetic harmonics that are suppressed by the spacing of the stator teeth 11, weakening the influence of the spacing between the stator teeth 11, reducing torque and torque pulsation, and thus reducing AC losses. Furthermore, it allows the rotor assembly to be installed on both sides of the stator assembly 1 in the axial direction of the motor housing 2, achieving a stable "sandwich"-like structure.

[0124] Optionally, in one embodiment of this disclosure, the stator assembly 1 further includes a sleeve 34, with a plurality of stator teeth 11 surrounding the sleeve 34 and arranged coaxially with the sleeve 34. The sleeve 34 is used for the passage of a rotating shaft. The plurality of stator teeth 11 surround the sleeve 34, thereby placing the sleeve 34 inside the stator assembly 1. It is understood that the plurality of stator teeth 11 are close to the outer wall of the sleeve 34, the interior of the sleeve 34 is used for the passage of the rotating shaft, and the outer wall of the sleeve 34 can also provide a sealing and isolation function, thereby providing a sealing and isolation function between the two end plates 3 in the axial direction of the motor housing 2.

[0125] Optionally, in one embodiment of this disclosure, a positioning member 22 is provided on the inner sidewall of the motor housing 2. The positioning member 22 is used for assembling and positioning the stator assembly 1 and for receiving the counter-torque of the stator assembly 1 to limit the rotation of the stator assembly 1 relative to the housing 21. By providing a positioning member 22 on the inner sidewall of the motor housing 2 for assembling and positioning the stator assembly 1, the torque transmission between the stator assembly 1 and the housing 21 is ensured to be unaffected, and the rotation of the stator assembly 1 relative to the housing 21 is limited. The positioning member 22 for the installation and positioning of the stator assembly 1 can achieve rapid and accurate positioning of the stator assembly 1 without the need for additional tools and other fixing structures, significantly reducing the number of parts and assembly steps, thereby reducing weight and assembly complexity.

[0126] Optionally, in one embodiment of this disclosure, the positioning member 22 and the housing 21 are integrally formed. This integrated design avoids the risks of loosening and eccentricity caused by separate installation of the positioning member 22 and the housing 21, improves the assembly coaxiality, positional accuracy and connection stability of the stator assembly 1, thereby improving the stability and reliability of motor operation, while also reducing weight and manufacturing and assembly costs.

[0127] Optionally, in one embodiment of this disclosure, the inner ring wall of the housing 21 is provided with a mounting portion 211, and at least a portion of the positioning member 22 is connected to the mounting portion 211. The positioning member 22 is at least partially connected to the mounting portion 211 of the housing 21. Through a split design, the positioning member 22 can be installed after the housing 21 is formed, reducing the processing difficulty of the housing 21. Furthermore, the positioning member 22 can be replaced or adjusted according to different specifications of the stator assembly 1, thereby improving versatility and adaptability. The mounting portion 211 provides installation conditions for the positioning member 22, which can improve the assembly accuracy and connection reliability of the positioning member 22, thereby reducing assembly errors and loosening risks in the stator assembly 1 and improving the fixing stability of the stator assembly 1.

[0128] Optionally, in one embodiment of this disclosure, the number of stator teeth 11 is multiple; the positioning member 22 includes a body 221 and a positioning part 222, the positioning part 222 is integrally formed with the body 221, the positioning part 222 is disposed between two adjacent stator teeth 11, and in the radial direction of the motor housing 2, a part of the body 221 is located on one side of the corresponding two adjacent stator teeth 11.

[0129] The integrated design of the positioning part 222 and the body 221 enhances structural strength and stability. The body 221 is radially offset to the tooth flank of the stator teeth 11, allowing the positioning part 222 to be positioned between two adjacent stator teeth 11. This avoids the body 221 occupying the space between adjacent positioning teeth and provides a clear limiting reference for the stator assembly 1, enabling automatic guidance and positioning during assembly, preventing rotation of the stator assembly 1, reducing installation errors and eccentricity risks, and thus ensuring the reliability and stability of the motor operation. Furthermore, the positioning part 222's position between two adjacent stator teeth 11 better ensures that torque transmission between the stator assembly 1 and the housing 21 remains unaffected, limiting rotation of the stator assembly 1 relative to the housing 21.

[0130] Optionally, in one embodiment of this disclosure, the positioning part 222 includes a positioning latch 2221, which is a protrusion formed on the side of the body 221 away from the housing 21. Along the direction away from the body 221, the width of the positioning latch 2221 in the radial direction of the motor housing 2 gradually decreases, and the end of the positioning latch 2221 away from the body 221 is configured as an arc-shaped end 22211. A gap is left between the positioning latch 2221 and two adjacent stator teeth 11 on both sides of the motor housing 2 in the circumferential direction, and the gap is used to accommodate the coil winding 4.

[0131] By setting a protruding positioning buckle 2221, the positioning buckle 2221 can be easily engaged between two adjacent stator teeth 11, occupying little space and not affecting the arrangement of the stator teeth 11. It also allows the positioning buckle 2221 to reliably limit the stator assembly 1 while reserving sufficient space between the motor housing 2 and the stator assembly 1 to accommodate the coil winding 4, preventing the positioning buckle 2221 from squeezing the coil winding 4 and thus not affecting the arrangement of the coil winding 4, reducing the risk of damage. The positioning buckle 2221 has a gradually decreasing width in the circumferential direction, facilitating engagement between two adjacent stator teeth 11. Furthermore, the positioning buckle 2221 can form an arc-shaped end 22211 with an guide slope and a smooth transition to guide the stator assembly 1 to the designated position, reducing the assembly resistance of the stator assembly 1 and minimizing space occupation. Additionally, it reduces the risk of scratching the coil winding 4 due to improper assembly operations. Meanwhile, the arc-shaped end 22211 reduces local stress concentration, allowing the positioning buckle 2221 to maintain structural stability under thermal expansion and contraction conditions, thus reducing the risk of deformation and damage.

[0132] Of course, in other embodiments, the positioning part 222 may also include a positioning groove, and the stator assembly 1 has a protrusion or flange that mates with the positioning groove. The positioning groove and the protrusion or flange mate to achieve positioning. The positioning groove and the protrusion or flange may be elongated or other shapes, such as a cross shape. Of course, the positioning part 222 may also include a positioning pin, which may be inserted between two adjacent stator teeth 11, or the stator assembly 1 may have a groove that mates with the positioning pin.

[0133] Optionally, in one embodiment of this disclosure, the main body 221 is provided with a clearance portion 2211, which is used to avoid some components of the stator assembly 1. By providing the clearance portion 2211, clearance can be provided for the coil winding 4, which facilitates the arrangement and routing of the enameled wire, avoids interference between the positioning member 22 and some components of the stator assembly 1, reduces the risk of damage, and allows the main body 221 to be arranged close to the stator assembly 1, improving the compactness and structural strength of the overall structure.

[0134] Optionally, in one embodiment of this disclosure, the body 221 includes a first plate 2212, a second plate 2213, and a third plate 2214. The first plate 2212 and the third plate 2214 are disposed opposite to each other. The first plate 2212 is connected to the housing 21. A positioning part 222 is disposed on the third plate 2214. The second plate 2213 is disposed between the first plate 2212 and the third plate 2214. Both ends of the second plate 2213 are respectively connected to the first plate 2212 and the third plate 2214, so that the cross-sectional shape of the body 221 is set as "U". The groove formed by the first plate 2212, the second plate 2213, and the third plate 2214 is set as an avoidance part 2211. The first plate 2212, the second plate 2213, and the third plate 2214 together form a U-shaped structure with grooves. The grooves are designed as clearance portions 2211, providing clear clearance space. This reduces the amount of material used, lowers manufacturing costs, and facilitates the formation of the clearance portions 2211. The clearance portions 2211 can accommodate some components of the stator assembly 1, achieving a clearance function. Furthermore, it facilitates the orderly routing of the coil windings 4. The U-shaped support design improves the bending and torsional resistance of the main body 221, reducing the deformation risk of the positioning component 22 during the assembly of the stator assembly 1 and torque transmission. The first plate 2212, the second plate 2213, and the third plate 2214 can be an integral structure, not independent structures, and can be integrally molded to reduce the weight of the positioning component 22 while ensuring its structural strength.

[0135] In some examples, the positioning part 222 is located on the radial side of the third plate 2214 away from the first plate 2212, leaving enough space between the first plate 2212 and the second plate 2213 to facilitate the arrangement of the coil winding 4, and enabling the positioning part 222 to be close to the stator assembly 1, ensuring that the positioning part 222 can exert a circumferential limiting effect on the stator assembly 1, and ensuring the fixed stability of the stator assembly 1.

[0136] Optionally, in one embodiment of this disclosure, the body 221 includes a fourth plate 2215 and a fifth plate 2216. The fourth plate 2215 is connected to the housing 21, and a positioning part 222 is disposed on the fifth plate 2216. The fourth plate 2215 and the fifth plate 2216 are arranged at an angle, and one end of the fourth plate 2215 is connected to one end of the fifth plate 2216 so that the cross-sectional shape of the body 221 is set as "L" shape. The space between the fourth plate 2215 and the fifth plate 2216 is set as a clearance part 2211. The fourth plate 2215 and the fifth plate 2216 together form an L-shaped cross-section, and the space between the fourth plate 2215 and the fifth plate 2216 is set as a clearance part 2211, which effectively reduces material usage, reduces processing and forming difficulty, balances clearance and lightweight design, reduces manufacturing costs, increases the space of the clearance part 2211, improves the clearance effect on some components of the stator assembly 1, and allows the fifth plate 2216 and the fourth plate 2215 to form effective support. The fourth plate 2215 and the fifth plate 2216 can be an integral structure, not independent structures, and can be integrally molded, which can reduce the weight of the positioning component 22 and ensure structural strength. It should be noted that the structure of the body 221 can be selected as needed. That is, the body 221 with a cross-sectional shape of "U" and / or the body 221 with a cross-sectional shape of "L" can be selected. This can improve adaptability, meet the avoidance requirements of some parts of different stator assemblies 1, and further improve the installation convenience and structural stability of stator assembly 1.

[0137] In some examples, the positioning part 222 can be located at the radial end of the fifth plate 2216 away from the fourth plate 2215, so that sufficient space can be reserved between the fifth plate 2216 and the fourth plate 2215 to facilitate the arrangement of the coil winding 4, and the positioning part 222 can be close to the stator assembly 1 to ensure that the positioning part 222 can exert a circumferential limiting effect on the stator assembly 1 and ensure the fixed stability of the stator assembly 1.

[0138] Optionally, in one embodiment of this disclosure, the body 221 includes a first part 2217 and a second part 2218. The first part 2217 is plate-shaped, and the second part 2218 is strip-shaped. One end of the first part 2217 and one end of the second part 2218 are connected, and the other end of the second part 2218 can be inserted into the mounting part 211. The first part 2217 and the second part 2218 cooperate to form a groove, and the groove is configured as an avoidance part 2211. The second part 2218, connected to the housing 21, is strip-shaped, facilitating insertion and mating with the mounting part 211. This enhances the overall structural strength and connection stability. It also forms a groove with the plate-shaped first part 2217, which avoids some components of the stator assembly 1, reducing interference risk. The plate-shaped first part 2217 uses less material, resulting in lower manufacturing costs, and facilitates the formation of the avoidance part 2211. The avoidance part 2211 can accommodate some components of the stator assembly 1, achieving a avoidance function. Furthermore, it facilitates the orderly routing of the coil windings 4. The plate-shaped first part 2217 provides greater support and limiting surface, aiding assembly and improving positioning stability and reliability. In some examples, the first part 2217 and the second part 2218 can be an integral structure, not independent structures, which can be integrally molded, reducing the weight of the positioning component 22 while ensuring structural strength. In some examples, the second part 2218 can be a guide bar. In some examples, the mounting part 211 can be a mounting hole.

[0139] In some examples, the thickness of the first part 2217 along the axial direction is less than the thickness of the second part 2218 along the axial direction, and the space formed by the thickness difference is set as the groove mentioned above, which ensures structural strength and achieves lightweight design.

[0140] In some examples, the first part 2217 can be constructed as a T-shaped structure, and the arc-shaped end 22211 can be provided at the radial end of the first part 2217 away from the second part 2218, with the arc-shaped end 22211 forming an arc transition towards both sides of the T-shaped structure; or, the first part 2217 can be constructed as a cross-shaped structure, with a protrusion formed at the radial end of the first part 2217 away from the second part 2218, which forms the aforementioned arc-shaped end 22211.

[0141] Optionally, in one embodiment of this disclosure, there are multiple positioning elements 22, which are distributed at intervals around the axis of the motor housing 2. The multiple positioning elements 22 are arranged at intervals along the circumference of the motor housing 2. Through multi-point limiting constraints, the assembly consistency and stability of the stator assembly 1 are significantly improved. This better ensures that the torque transmission between the stator assembly 1 and the housing 21 is not affected, restricts the rotation of the stator assembly 1 relative to the housing 21, effectively reduces stress concentration, improves the vibration resistance of the stator assembly 1, and significantly improves NVH performance. Furthermore, the arrangement of multiple positioning elements 22 facilitates the guidance and restriction of the wiring harness direction of the coil winding 4, resulting in a more regular wiring harness arrangement and reduced interference. In addition, the spaced arrangement of multiple positioning elements 22 forms a discontinuous structure, which can reduce the weight of the motor housing 2 and meet the requirements of lightweight design.

[0142] In the multiple positioning elements 22, the spacing between two adjacent positioning elements 22 can be different. It should be noted that the positions of the multiple positioning elements 22 can be arranged as needed, without too many restrictions. In particular, the positioning elements 22 can be selected to be set at different positions according to the component arrangement requirements of the stator assembly 1. For example, the positioning elements 22 can be divided into three groups, and each group of positioning elements 22 can include multiple U-shaped structure positioning elements 22 and / or multiple L-shaped structure positioning elements 22 and / or multiple guide bar positioning elements 22. Alternatively, the positioning elements 22 can be in two groups, and the number of positioning elements 22 in each group can be different. Each group of positioning elements 22 can include multiple guide bar positioning elements 22 and / or multiple U-shaped structure positioning elements 22 and / or multiple L-shaped structure positioning elements 22. The spacing between each group of positioning elements 22 can be greater than the spacing between two adjacent positioning elements 22 in each group. In this way, multiple positioning guidance and limiting functions can be generated, which can improve the fixation balance and uniformity of the stator assembly 1 and ensure the fixation stability of the stator assembly 1.

[0143] Optionally, in one embodiment of this disclosure, the axial flux motor further includes a rotor assembly and a cover plate. The rotor assembly is disposed on the side of the end plate 3 facing away from the stator assembly 1 in the axial direction of the motor housing 2. The cover plate covers the rotor assembly and is connected to the housing 21. The connection between the cover plate and the housing 21 provides reliable axial positioning support for the rotor assembly, ensuring the stability of the rotor during high-speed operation, reducing vibration and noise, and structurally providing effective protection for the rotor assembly, preventing damage from external impurities, dust, and vibration impacts.

[0144] A second aspect of this disclosure also provides a vehicle including the aforementioned axial flux motor.

[0145] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0146] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0147] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An axial flux motor, characterized in that, include: A stator assembly, the stator assembly including stator teeth; The motor housing includes a housing, the housing being annular, and at least one end of the housing being open in the axial direction of the motor housing, and the stator assembly being assembled inside the housing; An end plate covers the stator assembly. The end plate includes a plate body and pole shoes. The pole shoes are disposed on the plate body and connected to the stator teeth.

2. The axial flux motor according to claim 1, characterized in that, The plate is provided with a connecting part, which is connected to the housing. The plate is used to bear the counter torque of the stator assembly to limit the rotation of the stator assembly relative to the housing.

3. The axial flux motor according to claim 2, characterized in that, The connecting part is close to the circumferential edge of the plate, and there are multiple connecting parts that are distributed in a ring-shaped interval around the axis of the motor housing; The housing has at least one end in the axial direction of the motor housing with a plurality of circumferentially spaced assembly parts, the connecting part corresponds to the assembly part, the plate is connected to the housing through the cooperation of the connecting part and the assembly part, and the plate covers the open end.

4. The axial flux motor according to claim 1, characterized in that, The plate has a first surface and a second surface that are disposed opposite to each other in the axial direction of the motor housing, the first surface facing the stator assembly, and the pole shoe being located on the first surface.

5. The axial flux motor according to claim 4, characterized in that, The pole shoe is integrated into or embedded in the plate body; The first surface has a receiving portion, and the receiving portion has an opening on the first surface, and the pole shoe is at least partially embedded in the receiving portion.

6. The axial flux motor according to claim 5, characterized in that, The receiving portion is provided with a first limiting portion, and the pole shoe is provided with a second limiting portion. The cooperation between the first limiting portion and the second limiting portion is to at least restrict the movement of the pole shoe in the axial direction of the motor housing.

7. The axial flux motor according to claim 6, characterized in that, The first limiting part is disposed on the inner side wall of the receiving part, and the second limiting part is disposed on the side of the pole shoe in the radial direction of the motor housing; In this configuration, one of the first limiting part and the second limiting part is configured as a protrusion, and the other is configured as a slot, wherein the protrusion is engaged in the slot.

8. The axial flux motor according to claim 6, characterized in that, The pole shoe is provided with the second limiting part at both ends of the motor housing in the radial direction.

9. The axial flux motor according to claim 5, characterized in that, The pole piece is embedded in the receiving portion, and the exposed end of the pole piece through the opening is flush with the first surface.

10. The axial flux motor according to claim 5, characterized in that, The receiving portion includes a receiving groove formed on the first surface or a through hole penetrating the plate.

11. The axial flux motor according to claim 4, characterized in that, The end plate also includes a reinforcing plate, which is at least partially disposed in the area of ​​the plate body where the pole shoe is disposed.

12. The axial flux motor according to claim 11, characterized in that, The reinforcing plate is parallel to the plate body; In this configuration, one side of the reinforcing plate is connected to the surface of the second surface; or, At least a portion of the reinforcing plate is embedded within the plate body.

13. The axial flux motor according to claim 11, characterized in that, The projection of the reinforcing plate along the axial direction of the motor housing is set as the first projection; The plate body includes a first plate portion and a second plate portion. The first plate portion is integrated with the pole shoe member. The projection of the first plate portion along the axial direction of the motor housing is set as a second projection. The area of ​​the first projection is greater than or equal to the area of ​​the second projection.

14. The axial flux motor according to claim 11, characterized in that, The pole shoe, the reinforcing plate, and the plate body are molded into a single unit using an injection molding process.

15. The axial flux motor according to claim 1, characterized in that, The pole shoe includes a ring body, the plate body is provided with a receiving portion, the ring body is connected to the inner sidewall of the receiving portion, and the ring body is sleeved on the stator tooth so that a portion of the stator tooth can be placed in the ring body and in the receiving portion.

16. The axial flux motor according to claim 1, characterized in that, The pole shoe includes a layer plate and a ring body. The ring body is sleeved on the layer plate, and the ring body and the layer plate together form a groove. The groove is used to accommodate a part of the stator tooth, and the ring body is sleeved on a part of the stator tooth.

17. The axial flux motor according to claim 16, characterized in that, The plate is provided with a receiving portion, the ring is connected to the inner sidewall of the receiving portion, and the layer is located inside the receiving portion so that a portion of the stator tooth is placed inside the receiving portion.

18. The axial flux motor according to claim 1, characterized in that, The stator teeth are multiple and distributed at intervals around the axis of the motor housing, with the multiple stator teeth located on the same radial plane; The number of pole shoes on one end plate is multiple, and the multiple pole shoes are distributed at intervals around the axis of the motor housing, and the pole shoes correspond to the stator teeth.

19. The axial flux motor according to claim 1, characterized in that, The stator assembly further includes a coil winding wound on the stator teeth; The stator assembly further includes an insulating component, which is disposed on the side of the stator tooth in the radial and circumferential directions of the motor housing, and is disposed between the corresponding stator tooth and the corresponding coil winding.

20. The axial flux motor according to claim 19, characterized in that, In the axial direction of the motor housing, there is a gap between the edge of the insulating member and the corresponding stator tooth on the end face in the axial direction of the motor housing.

21. The axial flux motor according to claim 19, characterized in that, In the axial direction of the motor housing, the insulating element at least partially covers the end face of the stator teeth in the axial direction of the motor housing.

22. The axial flux motor according to claim 21, characterized in that, The insulating element at least partially covers the end faces of the stator teeth and the pole shoes in the axial direction of the motor housing.

23. The axial flux motor according to claim 1, characterized in that, The housing has open ends at both ends in the axial direction of the motor housing. There are two end plates, which are respectively connected to the two ends of the housing in the axial direction of the motor housing. The pole shoes of the two end plates are respectively connected to the two ends of the stator teeth in the axial direction of the motor housing. The stator assembly further includes a coil winding wound on the stator tooth, the coil winding being located between two pole shoes of the corresponding stator tooth.

24. The axial flux motor according to claim 23, characterized in that, The winding direction of the coil winding includes forward winding and reverse winding.

25. The axial flux motor according to claim 24, characterized in that, The winding directions of the coil windings on two adjacent stator teeth are opposite.

26. The axial flux motor according to claim 1, characterized in that, The stator assembly further includes a sleeve, and there are multiple stator teeth that surround the sleeve and are arranged coaxially with the sleeve. The sleeve is used for the shaft to pass through.

27. The axial flux motor according to claim 1, characterized in that, The inner wall of the motor housing is provided with a positioning element, which is used to position the stator assembly and to bear the counter torque of the stator assembly, so as to limit the rotation of the stator assembly relative to the housing.

28. The axial flux motor according to claim 27, characterized in that, The positioning element is integrally formed with the housing; or... The inner ring wall of the housing is provided with a mounting portion, and at least a portion of the positioning member is connected to the mounting portion.

29. The axial flux motor according to claim 27, characterized in that, The number of stator teeth is multiple; The positioning component includes a body and a positioning part, the positioning part being integrally formed with the body, the positioning part being disposed between two adjacent stator teeth, and in the radial direction of the motor housing, a portion of the body being located on one side of the corresponding two adjacent stator teeth.

30. The axial flux motor according to claim 29, characterized in that, The positioning part includes a positioning buckle, which is configured as a protrusion formed on the side of the body opposite to the housing; Along the direction away from the main body, the width of the positioning buckle in the radial direction of the motor housing gradually decreases, and the end of the positioning buckle away from the main body is set as an arc end.

31. The axial flux motor according to claim 29, characterized in that, The body is provided with a clearance part, which is used to avoid some components of the stator assembly.

32. The axial flux motor according to any one of claims 1-31, characterized in that, The axial flux motor further includes a rotor assembly and a cover plate. The rotor assembly is disposed on the side of the end plate opposite to the stator assembly in the axial direction of the motor housing. The cover plate covers the rotor assembly and is connected to the housing.

33. A vehicle, characterized in that, Including the axial flux motor as described in any one of claims 1-32.

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