Motor structure and vehicle

Abstract

The invention provides a motor structure and a vehicle, and the motor structure comprises a motor housing assembly which is provided with an accommodation cavity; the stator assembly is located in the containing cavity, the stator assembly comprises a stator winding and a stator iron core, the stator winding is embedded in the stator iron core, the stator iron core comprises a first stator punching sheet group, a second stator punching sheet group and a third stator punching sheet group, and the first stator punching sheet group, the second stator punching sheet group and the third stator punching sheet group are arranged in a staggered and laminated mode; the first stator punching sheet and the motor shell assembly form a first cooling channel, the second stator punching sheet group is provided with a second cooling channel, the third stator punching sheet is provided with a third cooling channel, and the first cooling channel, the second cooling channel and the third cooling channel are communicated with one another to form an oil path. The invention aims to solve the problems of insufficient winding cooling and poor heat dissipation uniformity of the existing oil-cooled motor in the prior art by spraying type cooling.

Description

Technical Field

[0001] This invention relates to the field of automotive electric drive technology, and more specifically, to a motor structure and a vehicle. Background Technology

[0002] The rapid development of new energy vehicles is driving the upgrading of motors towards miniaturization and high power density. Cooling capacity has become a core limiting factor. Oil-cooled motors have become the first choice for high-speed, high-power motors due to their advantages such as contact cooling and stable coolant properties. However, existing cooling solutions have many shortcomings: spray cooling does not provide sufficient contact for winding cooling, and unstable spraying affects the uniformity of heat dissipation; although immersion cooling can improve some problems, the radial heat dissipation uniformity of a single oil tank without stator oil passages is generally poor, the axial uniformity of a single-sided oil inlet solution is poor, the sealing effect and process cost of open slot structures are difficult to balance, and the straight section of the winding is not sufficiently cooled in a solution where only the two ends of the immersion tank are not connected to oil. Other irregular structure solutions have low structural maturity and high application difficulty.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] The main objective of this invention is to provide a motor structure and vehicle to solve the problems of insufficient cooling of windings and poor heat dissipation uniformity in existing oil-cooled motors.

[0005] To achieve the above objectives, according to one aspect of the present invention, an electric motor structure is provided, comprising: an electric motor housing assembly having a receiving cavity; and a stator assembly located within the receiving cavity, the stator assembly including: a stator winding and a stator core, the stator winding being embedded in the stator core, the stator core including: a first stator lamination group, a second stator lamination group, and a third stator lamination group, the first stator lamination group, the second stator lamination group, and the third stator lamination group being alternately stacked, the first stator laminations forming a first cooling channel with the electric motor housing assembly, the second stator lamination group having a second cooling channel, and the third stator laminations having a third cooling channel, wherein the first cooling channel, the second cooling channel, and the third cooling channel are interconnected to form an oil passage; wherein the electric motor housing assembly has an oil inlet and an oil outlet, the oil inlet and the oil outlet being respectively connected to the receiving cavity, the oil inlet being connected to the first cooling channel, and the oil outlet being disposed adjacent to the end of the stator assembly.

[0006] Furthermore, the first stator lamination group, the second stator lamination group, and the third stator lamination group are arranged with different structures.

[0007] Furthermore, the first stator lamination group is located between the second stator lamination group and the third stator lamination group.

[0008] Furthermore, the first stator lamination group includes: a first stator lamination body, the first stator lamination body includes multiple first stator lamination bodies, the multiple first stator lamination bodies are stacked, at least one of the multiple first stator lamination bodies has multiple first winding slots distributed circumferentially on its inner circumference, and the stator winding is embedded in the multiple first winding slots.

[0009] Furthermore, at least one of the second stator lamination group and the third stator lamination group includes: a second stator lamination body, the second stator lamination body including at least one second stator lamination body; and a third stator lamination body, the third stator lamination body including at least one third stator lamination body; wherein the second stator lamination body and the third stator lamination body are structurally different, and the third stator lamination body and the third stator lamination body are offset along the axial direction.

[0010] Furthermore, the inner circumference of the second stator lamination body is provided with a plurality of second winding slots at intervals, and the stator windings are embedded in the plurality of second winding slots. The outer circumference of the second stator lamination body is provided with a plurality of first cooling slots at intervals, and the plurality of first cooling slots form a second cooling channel.

[0011] Furthermore, the inner circumference of the third stator lamination body is provided with multiple third winding slots at intervals, and the stator windings are embedded in the multiple third winding slots. The outer circumference of the second winding slots is provided with multiple second cooling slots at intervals, and the circumference of the third stator lamination body is provided with multiple connecting slots at intervals. A connecting slot is arranged between any two adjacent third winding slots. Any one of the multiple second cooling slots is connected to two adjacent third winding slots through the connecting slot.

[0012] Furthermore, the geometric centers of the adjacent second stator laminations are set at an off-angle to the geometric centers of the third stator laminations.

[0013] Furthermore, the motor structure also includes an oil injection ring, which includes a first oil injection ring and a second oil injection ring. The first oil injection ring is located on the first side of the stator assembly, and the second oil injection ring is located on the second side of the stator assembly. The first oil injection ring and the second oil injection ring are connected to the motor housing.

[0014] According to another aspect of the embodiments of this application, a vehicle is also provided, including a motor structure, which is the motor structure described above.

[0015] By applying the technical solution of this invention, an annular elastic component is added to the outer side of the bearing outer ring, and an anti-creep unit is set on the outer side of the annular elastic component. This effectively suppresses the creep of the bearing outer ring, enhances the friction between the bearing outer ring and the inner ring of the annular support, thereby improving the overall stability and reliability of the bearing assembly. Moreover, the anti-creep unit is spaced apart from the bearing outer ring and directly contacts part of the annular support inner ring, reducing the radial and axial displacement of the bearing outer ring and avoiding chain failures caused by creep. This solves the problems of accelerated wear, decreased precision, and complex maintenance caused by the creep of the bearing outer ring in traditional bearing assemblies in the prior art. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the first embodiment of the motor structure provided in this application; Figure 2 This is a schematic diagram of the cooling oil circuit of a second embodiment of the motor structure provided in one embodiment of this application; Figure 3 This is a structural diagram of the first embodiment of the first stator lamination body in the motor structure provided in this application; Figure 4 This is a structural diagram of the first embodiment of the second stator lamination body in the motor structure provided in this application; Figure 5 This is a structural diagram of the first embodiment of the third stator lamination body in the motor structure provided in this application; Figure 6 This is a structural diagram of the first embodiment of the stator core in the motor structure provided in this application; Figure 7 This is a structural diagram of the third embodiment of the stator core in the motor structure provided in one embodiment of this application; Figure 8 This is a structural diagram of the first embodiment of the stator assembly in the motor structure provided in this application.

[0017] The above figures include the following reference numerals: 1. Motor housing assembly; 2. Stator core; 21. First stator lamination group; 211. First stator lamination body; 2111. First winding slot; 212. Second stator lamination body; 2121. Second winding slot; 2122. First cooling slot; 213. Third stator lamination body; 2131. Third winding slot; 2132. Second cooling slot; 2133. Connecting slot; 22. Second stator lamination group; 23. Third stator lamination group; 3. Stator windings; 41. First fuel injection ring; 42. Second fuel injection ring; 5. Oil inlet hole;

[0018] 61. First oil outlet; 62. Second oil outlet. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] The rapid development of the new energy vehicle industry is driving continuous innovation in motor technology. As a core component of new energy vehicles, the performance of the drive motor directly affects the vehicle's power output, energy efficiency, and reliability. To improve vehicle range, power response, and other performance aspects, motors are being upgraded towards miniaturization and high power density. For example, by adopting new materials such as amorphous alloys and nanocomposite insulating materials, and by optimizing motor structural design, such as the application of axial flux motors, motors can achieve higher power output within a smaller volume.

[0021] As the power density of electric motors continues to increase, the heat generated during operation also increases significantly. High temperatures can lead to a decline in the insulation performance of the motor, shorten its service life, and affect the overall vehicle performance and safety. Therefore, achieving efficient and reliable cooling has become a key factor restricting the improvement of electric motor performance in new energy vehicles. Traditional air-cooling technology has low heat dissipation efficiency and can hardly meet the heat dissipation requirements of high-power motors. Although water-cooling technology has higher heat dissipation efficiency, the system is complex, costly, and carries the risk of leakage. In contrast, oil-cooling technology offers superior heat dissipation performance.

[0022] This application provides an embodiment of a motor structure, such as... Figures 1-6As shown, it includes: a motor housing assembly 1, which has a receiving cavity; and a stator assembly located within the receiving cavity. The stator assembly includes: a stator winding 3 and a stator core 2. The stator winding 3 is embedded in the stator core 2. The stator core 2 includes: a first stator lamination group 21, a second stator lamination group 22, and a third stator lamination group 23. The first stator lamination group 21, the second stator lamination group 22, and the third stator lamination group 23 are arranged in an alternating stacked manner. The first cooling channel is formed by the first stator lamination group 21 and the second stator lamination group 22, and the third stator lamination group 23. The first, second, and third cooling channels are interconnected to form an oil passage. The motor housing assembly 1 has an oil inlet 5 and an oil outlet 5, which are respectively connected to the receiving cavity. The oil inlet 5 is connected to the first cooling channel, and the oil outlet 5 is located adjacent to the end of the stator assembly. The oil outlet 5 includes a first oil outlet 61 and a second oil outlet 62. The first and second oil outlets 61 and 62 are located at both ends of the motor housing assembly 1, and the oil inlet 5 is located in the middle of the motor housing assembly 1.

[0023] In this embodiment, the motor housing assembly 1 provides a mounting base for the stator assembly through its own cavity. The oil inlet 5 of the assembly is directly connected to the first cooling channel formed by the first stator lamination group 21 and the housing, ensuring that the cooling oil enters the oil circuit efficiently. The stator core 2 adopts an alternating stacked design of the first stator lamination group 21, the second stator lamination group 22, and the third stator lamination group 23, so that the first, second, and third cooling channels formed by the three are interconnected, constructing a three-dimensional oil circuit covering the stator core, which can achieve comprehensive heat dissipation for the stator winding 3 embedded thereon. At the same time, the oil outlet of the motor housing assembly 1 is set adjacent to the end of the stator assembly, which can quickly remove the heat from the stator end. The overall solution greatly improves the heat dissipation efficiency and uniformity through multi-channel coordination and reasonable oil circuit layout.

[0024] Furthermore, the first stator lamination group 21, the second stator lamination group 22, and the third stator lamination group 23 are structurally different. The motor housing assembly 1 carries the stator assembly through a receiving cavity, and its oil inlet 5 is directly connected to the first cooling channel formed by the first stator lamination group 21 and the housing, providing an efficient entry point for cooling oil. The first stator lamination group 21, the second stator lamination group 22, and the third stator lamination group 23 of the stator core 2 adopt differentiated structural designs, and the three are interconnected to form a three-dimensional oil circuit, which can achieve multi-dimensional coverage and heat dissipation for the embedded stator winding 3. At the same time, the oil outlet of the motor housing assembly 1 is adjacent to the end of the stator assembly, which can quickly remove the heat from the end. The structural differences of the different lamination groups, combined with the interconnected oil circuit, further improve the accuracy and overall efficiency of heat dissipation.

[0025] In this embodiment, the first stator lamination group 21 is located between the second stator lamination group 22 and the third stator lamination group 23. The first stator lamination group 21, positioned between the second stator lamination group 22 and the third stator lamination group 23, forms a first cooling channel with the motor housing assembly 1. This channel serves as an intermediate conduit for the cooling oil after it enters through the oil inlet 5, quickly diverting the oil to the second cooling channels of the second stator lamination group 22 and the third cooling channels of the third stator lamination group 23. Combined with the interconnected oil circuit design, this allows the cooling oil to more evenly cover the entire stator core 2, thereby achieving symmetrical and efficient heat dissipation for the stator winding 3 embedded thereon. Simultaneously, the first stator lamination group 21 in the middle position can balance the heat dissipation rhythm of the lamination groups on both sides. Combined with the rapid oil drainage from the adjacent oil outlet at the end of the motor housing assembly 1, this further enhances the overall stability and uniformity of heat dissipation.

[0026] Furthermore, the first stator lamination group 21 includes: a first stator lamination body 211, which includes a plurality of first stator lamination bodies 211, which are stacked together. At least one of the first stator lamination bodies 211 has a plurality of first winding slots 2111 spaced apart on its inner circumference, and the stator winding 3 is embedded in the plurality of first winding slots 2111. The first stator lamination group 21 includes multiple stacked first stator lamination bodies 211, wherein at least one first stator lamination body 211 has multiple first winding slots 2111 spaced apart on its inner circumference for the stator winding 3 to be embedded therein. This ensures the stability of the winding installation and allows the cooling oil to flow closer to the winding embedding area in the first cooling channel through the lamination group structure, thereby enhancing the direct cooling effect on the stator winding 3. At the same time, the multiple lamination stacking design, together with the connecting oil circuit formed by the second stator lamination group 22 and the third stator lamination group 23, can further improve the synergy between the heat dissipation of the stator core 2 and the winding. Combined with the oil inlet 5 and the end oil outlet of the motor housing assembly 1, it achieves precise coverage of the cooling oil on key heat-generating components.

[0027] Specifically, such as Figure 7 and Figure 8 As shown, at least one of the second stator lamination group 22 and the third stator lamination group 23 includes: a second stator lamination body 212, the second stator lamination body 212 including at least one second stator lamination body 212; and a third stator lamination body 213, the third stator lamination body 213 including at least one third stator lamination body 213; wherein the second stator lamination body 212 and the third stator lamination body 213 are structurally different and are offset along the axial direction.

[0028] In this embodiment, at least one of the second stator lamination group 22 and the third stator lamination group 23 includes a second stator lamination body 212 and a third stator lamination body 213 with different structures, and the third stator lamination bodies 213 are staggered along the axial direction. This differentiated structure and staggered layout can make the second and third cooling channels form a more complex oil circuit path, increasing the residence time and contact area of ​​the cooling oil in the stator core 2. At the same time, in conjunction with the first stator lamination group 21 located in the middle and the stator winding 3 in the first winding slot 2111, the cooling oil can more accurately cover the winding and different heat-generating areas of the core in the connected oil circuit. Combined with the oil inlet 5 of the motor housing assembly 1 and the oil outlet at the end, the heat dissipation uniformity and efficiency are further improved, taking into account both structural adaptability and cooling effect.

[0029] In this embodiment, the inner circumference of the second stator lamination body 212 is provided with a plurality of second winding slots 2121, the stator winding 3 is embedded in the plurality of second winding slots 2121, and the outer circumference of the second stator lamination body 212 is provided with a plurality of first cooling grooves 2122, the plurality of first cooling grooves 2122 forming a second cooling channel. Multiple second winding slots 2121, spaced apart circumferentially within the second stator lamination body 212, are provided for the stator windings 3 to be embedded, ensuring the windings are securely installed while maintaining close contact with the lamination body to enhance heat conduction. Multiple first cooling slots 2122, spaced apart circumferentially on the outer side, form a second cooling channel, allowing cooling oil to flow directly through the outer periphery of the stator core, efficiently removing heat from the stator core 2 and the embedded windings. This combination of internal and external structures, along with the oil circuits connected to the first stator lamination group 21 and the third stator lamination group 23, as well as the oil inlet 5 and end outlet of the motor housing assembly 1, enables the cooling oil to provide dual coverage of the winding embedding area and the core body, significantly improving the targeted heat dissipation and overall efficiency.

[0030] Furthermore, the inner circumference of the third stator lamination body 213 is provided with a plurality of third winding slots 2131 at intervals, and the stator winding 3 is embedded in the plurality of third winding slots 2131. The outer circumference of the second winding slots 2121 is provided with a plurality of second cooling slots 2132 at intervals, and the circumference of the third stator lamination body 213 is provided with a plurality of connecting slots 2133 at intervals. A connecting slot 2133 is arranged between any two adjacent third winding slots 2131. Any one of the second cooling slots 2132 is connected to the two adjacent third winding slots 2131 through the connecting slot 2133.

[0031] In this embodiment, multiple third winding slots 2131 in the inner circumference of the third stator lamination body 213 are used to embed the stator winding 3, ensuring stable installation of the winding and enhancing heat transfer; multiple second cooling slots 2132 in the outer circumference form the basis of the third cooling channel, and the second cooling slots are connected to the third winding slots on both sides through the circumferentially spaced connecting slots 2133, so that the cooling oil can flow directly from the outer circumference into the winding embedding area, accurately cooling the heat-generating core of the stator winding 3 and the stator core 2; this structure, combined with the second winding slots 2121 and the first cooling slots 2122 of the second stator lamination body 212, as well as the oil passage connected to the first stator lamination group 21, combined with the oil inlet 5 of the motor housing assembly 1 and the oil outlet at the end, achieves full coverage of the cooling oil from the outer circumference to the winding embedding area, greatly improving the accuracy and efficiency of heat dissipation.

[0032] Furthermore, the geometric centers of adjacent second stator lamination bodies 212 and third stator lamination bodies 213 are set at an angle. This angled arrangement of the second and third stator lamination bodies 212 and 213 creates a staggered fit in the circumferential direction between the second winding slot 2121 and first cooling slot 2122 of the second stator lamination body 212 and the third winding slot 2131, second cooling slot 2132, and connecting slot 2133 of the third stator lamination body 213. This extends the flow path of the cooling oil in the connecting oil passage, increasing the contact time and area with the stator windings 3 and stator core 2. Simultaneously, this angled arrangement allows the cooling oil to more evenly cover each winding slot and core area. Combined with the intermediate conduction effect of the first stator lamination assembly 21 and the oil inlet 5 and outlet of the motor housing assembly 1, this further improves heat dissipation uniformity and overall efficiency, enhancing the cooling effect on key heat-generating components of the high-power-density motor.

[0033] In this embodiment, the motor structure further includes an oil injection ring, comprising a first oil injection ring 41 and a second oil injection ring 42. The first oil injection ring 41 is located on the first side of the stator assembly, and the second oil injection ring 42 is located on the second side of the stator assembly. The first oil injection ring 41 and the second oil injection ring 42 are connected to the motor housing. The oil injection ring 4 includes a first oil injection ring 41 located on the first side of the stator assembly and a second oil injection ring 42 located on the second side, both of which are connected to the motor housing. It can precisely spray oil to cool the core heat-generating areas such as the ends of the stator winding 3 from both ends of the stator assembly, compensating for the insufficient heat dissipation of the ends by the iron core oil circuit. At the same time, in conjunction with the connected oil circuit formed by the first stator lamination group 21, the second stator lamination body 212, and the third stator lamination body 213, as well as the oil inlet 5 and oil outlet of the motor housing assembly 1, it greatly improves the heat dissipation coverage of the entire stator iron core 2 and winding, especially enhancing the heat dissipation capacity of the ends under high power conditions, further ensuring the stability of motor operation.

[0034] According to another specific embodiment of this application, a vehicle is also provided, including a motor structure, which is the motor structure described above.

[0035] The above-mentioned optional embodiments of this application can achieve the following beneficial effects: the first stator lamination group 21, the second stator lamination group 22 and the third stator lamination group 23 of the motor, through differentiated structures and connected oil circuits, together with the first cooling tank 2122, the second cooling tank 2132 and the connecting tank 2133, realize full-area heat dissipation of the stator core 2 and the stator winding 3; at the same time, the first oil injection ring 41 and the second oil injection ring 42 spray oil from both ends of the stator assembly to enhance end heat dissipation, and combined with the oil inlet hole 5 and the oil outlet hole of the motor housing assembly 1 to ensure oil circuit circulation, this cooling system can effectively deal with the heat generation problem under high power conditions, so that the motor always maintains a high-efficiency operating state, thereby improving the vehicle's power response speed, range and driving stability.

[0036] In this application, "multiple" refers to two or more.

[0037] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0039] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0040] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0041] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A motor structure, characterized in that, include: Motor housing assembly (1), the motor housing assembly (1) having a receiving cavity; A stator assembly is located within the receiving cavity. The stator assembly includes a stator winding (3) and a stator core (2). The stator winding (3) is embedded in the stator core (2). The stator core (2) includes a first stator lamination group (21), a second stator lamination group (22), and a third stator lamination group (23). The first stator lamination group (21), the second stator lamination group (22), and the third stator lamination group (23) are arranged in an alternating overlapping manner. The first stator lamination group (21) forms a first cooling channel with the motor housing assembly (1). The second stator lamination group (22) has a second cooling channel. The third stator lamination group (23) has a third cooling channel. The first cooling channel, the second cooling channel, and the third cooling channel are interconnected to form an oil passage. The motor housing assembly (1) has an oil inlet (5) and an oil outlet. The oil inlet (5) and the oil outlet are respectively connected to the receiving cavity. The oil inlet (5) is connected to the first cooling channel. The oil outlet is disposed adjacent to the end of the stator assembly.

2. The motor structure according to claim 1, characterized in that, The first stator lamination group (21), the second stator lamination group (22), and the third stator lamination group (23) are arranged with different structures.

3. The motor structure according to claim 1 or 2, characterized in that, The first stator lamination group (21) is located between the second stator lamination group (22) and the third stator lamination group (23).

4. The motor structure according to claim 3, characterized in that, The first stator lamination group (21) includes: The first stator lamination body (211) includes a plurality of first stator lamination bodies (211), which are stacked together. At least one of the first stator lamination bodies (211) has a plurality of first winding slots (2111) spaced apart in the inner circumference. The stator winding (3) is embedded in the plurality of first winding slots (2111).

5. The motor structure according to claim 3, characterized in that, At least one of the second stator lamination group (22) and the third stator lamination group (23) includes: The second stator lamination body (212) includes at least one second stator lamination body (212). The third stator lamination body (213) includes at least one third stator lamination body (213). The second stator lamination body (212) and the third stator lamination body (213) are structurally different, and the third stator lamination body (213) and the third stator lamination body (213) are offset along the axial direction.

6. The motor structure according to claim 5, characterized in that, The second stator lamination body (212) has a plurality of second winding slots (2121) spaced apart on its inner circumference. The stator winding (3) is embedded in the plurality of second winding slots (2121). The second stator lamination body (212) has a plurality of first cooling slots (2122) spaced apart on its outer circumference. The plurality of first cooling slots (2122) form a second cooling channel.

7. The motor structure according to claim 5, characterized in that, The inner circumference of the third stator lamination body (213) is provided with a plurality of third winding slots (2131) spaced apart. The stator winding (3) is embedded in the plurality of third winding slots (2131). The outer circumference of the third winding slots (2131) is provided with a plurality of second cooling slots (2132) spaced apart. The circumference of the third stator lamination body (213) is provided with a plurality of connecting slots (2133). A connecting slot (2133) is arranged between any two adjacent third winding slots (2131). Any one of the second cooling slots (2132) is connected to the two adjacent third winding slots (2131) through the connecting slot (2133).

8. The motor structure according to claim 5, characterized in that, The geometric center of the adjacent second stator lamination body (212) is set at an off-angle with the geometric center of the third stator lamination body (213).

9. The motor structure according to claim 3, characterized in that, The motor structure also includes: The oil injection ring includes a first oil injection ring (41) and a second oil injection ring (42). The first oil injection ring (41) is located on a first side of the stator assembly, and the second oil injection ring (42) is located on a second side of the stator assembly. The first oil injection ring (41) and the second oil injection ring (42) are connected to the motor housing.

10. A vehicle, comprising a motor structure, characterized in that, The motor structure is the motor structure described in any one of claims 1-9.

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