Rotor assembly, electric machine and vehicle

Abstract

This invention discloses a rotor assembly, a motor, and a vehicle. The rotor assembly includes a rotor shaft, a rotor core, a first end plate, and a second end plate. The rotor shaft has an oil inlet channel, a first flow channel, and a second flow channel, which are spaced apart and connected to the oil inlet channel. The rotor core is located on the outer periphery of the rotor shaft and has a third flow channel and a fourth flow channel, which are spaced apart circumferentially and extend axially. The first end plate is located at one axial end of the rotor core and has a fifth flow channel, through which the third flow channel connects to the first flow channel. The second end plate is located at the other axial end of the rotor core and has a sixth flow channel, through which the fourth flow channel connects to the second flow channel. Therefore, the heat dissipation of the rotor assembly is more uniform, thereby improving the performance of the motor.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and in particular to a rotor assembly, an electric motor, and a vehicle. Background Technology

[0002] The electric motor is the mechanical power source of an electric drive powertrain. To balance the demands for high power output with the structural constraints of a compact space, increasing power density has become an inevitable trend in motor technology development. However, with the continuous increase in power density, the problem of motor heat dissipation has become particularly prominent. In related technologies, uneven heat dissipation of the rotor assembly can easily affect the performance of the motor. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a rotor assembly, a motor, and a vehicle, wherein the rotor assembly provides more uniform heat dissipation to improve the performance of the motor.

[0004] According to a first aspect of the present invention, a rotor assembly includes: a rotor shaft, a rotor core, a first end plate, and a second end plate. The rotor shaft has an oil inlet channel, a first channel, and a second channel. The first channel and the second channel are spaced apart and are respectively connected to the oil inlet channel. The rotor core is disposed on the outer periphery of the rotor shaft and has a third channel and a fourth channel. The third channel and the fourth channel are spaced apart circumferentially and both extend axially. The first end plate is disposed at one axial end of the rotor core and has a fifth channel. The third channel is connected to the first channel through the fifth channel. The second end plate is disposed at the other axial end of the rotor core and has a sixth channel. The fourth channel is connected to the second channel through the sixth channel.

[0005] According to an embodiment of the present invention, the rotor assembly can divide the oil flowing in from the oil inlet channel into two streams. One stream flows through the first channel, then through the fifth channel, and finally through the third channel. The other stream flows through the second channel, then through the sixth channel, and finally through the sixth channel. By combining a first end plate located at one end of the rotor core along the axial direction and a second end plate located at the other end of the rotor core along the axial direction, the two streams of oil can flow in opposite directions along the axial direction of the rotor core. The two streams of oil are less likely to interfere with each other, so that the rotor assembly can obtain a more uniform heat dissipation effect at both ends along the axial direction. The rotor assembly is less likely to have a large temperature difference at both ends along the axial direction, and the overall temperature can be more balanced, thereby improving the reliability of the rotor assembly.

[0006] In some embodiments, there are multiple third and fourth flow channels, and the multiple third and fourth flow channels are alternately arranged in the circumferential direction; and / or, at least one of the fifth and sixth flow channels is configured to include a first segment, a second segment, and a third segment, the second segment extending in a ring shape in the circumferential direction, the first segment communicating with the radial inner side of the second segment, and the third segment being multiple segments arranged at intervals in the circumferential direction and all communicating with the radial outer side of the second segment.

[0007] In some embodiments, the first end plate has a first oil outlet channel spaced apart from the fifth flow channel, the first oil outlet channel communicating with the fourth flow channel and extending through to the side of the first end plate away from the rotor core; the second end plate has a second oil outlet channel spaced apart from the sixth flow channel, the second oil outlet channel communicating with the third flow channel and extending through to the side of the second end plate away from the rotor core.

[0008] In some embodiments, one axial end of the rotor shaft has an output portion, which is separated from the oil inlet channel, and the oil inlet channel extends through the other axial end of the rotor shaft.

[0009] In some embodiments, the rotor shaft has a first mounting portion and a second mounting portion, which are axially spaced apart and respectively used for mounting bearings. The first mounting portion is located on the side of the first end plate opposite to the second end plate, and the second mounting portion is located on the side of the second end plate opposite to the first end plate. The rotor shaft has a seventh flow channel and an eighth flow channel, which are spaced apart and respectively connected to an oil inlet flow channel. The outlet of the seventh flow channel is located adjacent to the first mounting portion, and the outlet of the eighth flow channel is located adjacent to the second mounting portion.

[0010] According to a second aspect of the present invention, an electric motor includes a housing assembly and a rotor assembly according to a first aspect of the present invention. The housing assembly includes a housing and an oil injector, the oil injector being disposed at one axial end within the housing, the rotor assembly being disposed within the housing, and the oil injector being connected to an oil inlet channel.

[0011] According to the present invention, the rotor assembly of the motor can achieve more comprehensive heat dissipation, thereby improving the reliability of the motor.

[0012] In some embodiments, the housing includes a base and an end cap component. The end cap component is located at one axial end of the base and has an arrangement space for passing through the resolver wire of the motor. The oil injector is fixed to the end cap component. The base has a ninth flow channel with at least one filter. The end cap component has a tenth flow channel, and the oil injector is connected to the ninth flow channel through the tenth flow channel.

[0013] In some embodiments, the housing has an installation cavity and a holding cavity. The rotor assembly is disposed in the installation cavity, and the holding cavity is located below the installation cavity and is used to hold the heat exchange medium. The two axial ends of the installation cavity are respectively connected to the holding cavity. The housing has a third mounting part for mounting the drive pump and a fourth mounting part for mounting the cooler. The housing has a ninth flow channel. The third mounting part and the fourth mounting part divide the ninth flow channel into a fourth segment, a fifth segment, and a sixth segment. The fourth segment connects the holding cavity and the third mounting part, the fifth segment connects the third mounting part and the fourth mounting part, and the sixth segment connects the fourth mounting part and the oil injection component.

[0014] In some embodiments, the motor includes: a stator assembly, which is nested with the rotor assembly, and includes a stator core, a stator winding, and an oil injection ring. The stator winding is wound around the stator core, and the stator core has oil injection rings at both axial ends that are opposite to the portions of the stator windings that protrude from the stator core. The stator core has an eleventh flow channel to connect two oil injection rings, and the housing has a ninth flow channel that communicates with one of the oil injection rings.

[0015] A vehicle according to a third aspect of the present invention includes a motor according to a second aspect of the present invention.

[0016] According to the vehicle of the present invention, the above-mentioned motor has good reliability, which facilitates the improvement of vehicle reliability.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of a motor according to some embodiments of the present invention; Figure 2 yes Figure 1 The cross-sectional view of the motor shown; Figure 3 This is a schematic diagram of a rotor assembly according to some embodiments of the present invention; Figure 4 This is a schematic diagram of a rotor assembly according to some embodiments of the present invention; Figure 5 yes Figure 3 The diagram shows a rotor assembly with the rotor core removed. Figure 6 yes Figure 5 A schematic diagram of the rotor shaft shown; Figure 7 This is a schematic diagram of a motor according to some embodiments of the present invention; Figure 8 yes Figure 7 The cross-sectional view of the motor shown; Figure 9 yes Figure 7 Another cross-sectional view of the motor shown; Figure 10 This is a schematic diagram of a motor according to some embodiments of the present invention; Figure 11 yes Figure 10 The cross-sectional view of the motor shown; Figure 12 This is a partial cross-sectional view of an electric motor according to some embodiments of the present invention; Figure 13 This is an exploded view of an electric motor according to some embodiments of the present invention.

[0020] Figure label: Motor 100 Rotor assembly 1, rotor shaft 11, oil inlet channel 111, first channel 112, second channel 113, output section 114, first mounting section 115, second mounting section 116, seventh channel 117, eighth channel 118, rotor core 12, third channel 121, fourth channel 122, first end plate 13, fifth channel 131, first oil outlet channel 132, second end plate 14, sixth channel 141, second oil outlet channel 142, bearing 15. Stator assembly 2, stator core 21, eleventh flow channel 211, first end face 212, second end face 213, stator winding 22, oil injection ring 23, first oil injection ring 231, first oil injection flow channel 2311, limiting protrusion 2312, second oil injection ring 232, second oil injection flow channel 2321. Paragraph 1, 31; Paragraph 2, 32; Paragraph 3, 33; Paragraph 4, 34; Paragraph 5, 35; Paragraph 6, 36. 4. Housing assembly 4, housing 41, base 411, ninth flow channel 4111, end cover component 412, first end cover 4121, second end cover 4122, arrangement space 4123, tenth flow channel 4124, seventh section 4124a, eighth section 4214b, mounting cavity 413, holding cavity 414, third mounting part 415, fourth mounting part 416, first limiting surface 417, second limiting surface 418, limiting groove 419, oil injection component 42, filter 43, cooler 46, drive pump 47. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0023] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0024] Hereinafter, with reference to the accompanying drawings, a rotor assembly 1 according to a first aspect of the present invention will be described.

[0025] Please refer to Figures 1-6 The rotor assembly 1 includes: a rotor shaft 11, a rotor core 12, a first end plate 13, and a second end plate 14. The rotor shaft 11 has an oil inlet channel 111, a first channel 112, and a second channel 113. The first channel 112 and the second channel 113 are spaced apart and are respectively connected to the oil inlet channel 111. The rotor core 12 is located on the outer periphery of the rotor shaft 11 and has a third channel 121 and a fourth channel 122. The third flow channel 121 and the fourth flow channel 122 are arranged circumferentially and both extend axially. The first end plate 13 is located at one axial end of the rotor core 12 and has a fifth flow channel 131. The third flow channel 121 is connected to the first flow channel 112 through the fifth flow channel 131. The second end plate 14 is located at the other axial end of the rotor core 12 and has a sixth flow channel 141. The fourth flow channel 122 is connected to the second flow channel 113 through the sixth flow channel 141.

[0026] It is understood that the rotor core 12 has a rotation axis, the extension direction of which is the axial direction of the rotor core 12, the axial direction of the rotor assembly 1, the axial direction of the stator assembly 2, and the axial direction of the motor 100. The direction around the rotation axis is the circumferential direction of the rotor core 12, the circumferential direction of the rotor assembly 1, the circumferential direction of the stator assembly 2, and the circumferential direction of the motor 100. In the radial plane, the direction passing through the rotation axis is the radial direction of the rotor core 12, the radial direction of the rotor assembly 1, the radial direction of the stator assembly 2, and the radial direction of the motor 100. The radial plane is perpendicular to the rotation axis.

[0027] As can be seen, the oil flowing into the rotor assembly 1 from the oil inlet channel 111 (not limited to cooling oil, but can also be other cooling media) is divided into two streams. One stream flows through the first channel 112 and then through the fifth channel 131 to the third channel 121, while the other stream flows through the second channel 113 and then through the sixth channel 141 to the fourth channel 122, thus achieving more comprehensive heat dissipation for the rotor assembly 1. Furthermore, the first end plate 13 is located at one end of the rotor core 12 along the axial direction, and the second end plate 14 is located at the other end of the rotor core 12 along the axial direction. This allows the two streams of oil flowing through the third channel 121 and the fourth channel 122 to flow in opposite directions along the axial direction of the rotor core 12, minimizing mutual interference between the two streams. This ensures that both ends of the rotor assembly 1 receive relatively uniform heat dissipation along the axial direction, reducing the likelihood of a large temperature difference between the two ends and resulting in a more balanced overall temperature, thereby improving the reliability of the rotor assembly 1.

[0028] As an example, rotor assembly 1 is used in motor 100, which can serve as a power source for a vehicle. As the vehicle operates, heat is continuously generated in motor 100. The rotor assembly 1 of this application can divide the oil flowing in from the oil inlet channel 111 into two streams, so as to achieve a more uniform heat dissipation effect on both ends of rotor assembly 1 in the axial direction. It can dissipate the heat generated by rotor assembly 1 during operation in a timely manner and is less likely to cause local overheating of rotor assembly 1, thereby improving the reliability of motor 100.

[0029] It is understood that this application does not limit the number of the first flow channel 112, the second flow channel 113, the third flow channel 121, the fourth flow channel 122, the fifth flow channel 131 and the sixth flow channel 141. There can be one or more, and the choice can be made according to actual needs.

[0030] In related technologies, when heat dissipation is required for the rotor assembly, the oil only flows from one end of the rotor assembly to the other in the axial direction. This results in a better heat dissipation effect at the end of the rotor assembly that first contacts the oil in the axial direction than at the end that contacts the oil later in the axial direction. This leads to uneven heat dissipation in the rotor assembly. In this application, the rotor assembly 1 can divide the oil flowing in from the oil inlet channel 111 into two streams, and the two streams can flow in opposite directions in the axial direction of the rotor core 12. This allows the rotor assembly 1 to achieve a more uniform heat dissipation effect at both ends in the axial direction, and prevents a large temperature difference between the two ends of the rotor assembly 1 in the axial direction, thereby improving the reliability of the rotor assembly 1.

[0031] In some examples, the oil inlet channel 111 is located inside the rotor shaft 11, and the first channel 112 and the second channel 113 are both arranged through the outer peripheral wall of the rotor shaft 11.

[0032] It is understood that the third flow channel 121 extends axially, which may include the third flow channel 121 extending in a straight line along the axial direction or extending in a curved line along the axial direction (e.g., the third flow channel 121 extending spirally along the axial direction); the fourth flow channel 122 extends axially, which may include the fourth flow channel 122 extending in a straight line along the axial direction or extending in a circumferential curve (e.g., the fourth flow channel 122 extending spirally along the axial direction). Figure 4 In the example, the third flow channel 121 and the fourth flow channel 122 extend in a straight line along the axial direction, and their length direction is parallel to the axial direction. When the rotor core 12 includes multiple rotor laminations stacked along the axial direction, it is not easy to increase the specifications of the rotor laminations due to the arrangement of the third flow channel 121 and the fourth flow channel 122, which makes it easier to simplify the structure of the rotor core 12.

[0033] As an example, the rotor assembly 1 includes a rotor magnet, a rotor core 12 with a magnet slot, the rotor magnet is disposed in the magnet slot, the magnet slot is spaced apart from the first flow channel 121, and the magnet slot is spaced apart from the second flow channel 122. The arrangement of the first flow channel 121 and the second flow channel 122 also facilitates the appropriate reduction of the weight of the rotor core 12 while ensuring reliable use of the rotor core 12.

[0034] Please refer to Figures 3-6In some embodiments, there are multiple third flow channels 121 and multiple fourth flow channels 122. Multiple third flow channels 121 and multiple fourth flow channels 122 can have a larger heat exchange area, thus providing better heat dissipation for the rotor assembly 1. The multiple third flow channels 121 and multiple fourth flow channels 122 are arranged alternately along the circumference, making their placement more reasonable and providing a more uniform heat dissipation effect for the rotor assembly 1. This reduces the likelihood of large local temperature differences and improves the reliability of the rotor assembly 1. As an example, in the circumferential direction of the rotor core 12, each third flow channel 121 is located between two adjacent fourth flow channels 122, and each fourth flow channel 122 is located between two adjacent third flow channels 121.

[0035] It is understood that at least one of the third flow channel 121 and the fourth flow channel 122 can be two, three, four, or more than four, etc., and this application does not impose any restrictions in this regard. Figure 4 In the example, there are four third flow channels 121 and four fourth flow channels 122. The multiple third flow channels 121 and multiple fourth flow channels 122 are set at equal intervals in the circumferential direction, and the adjacent third flow channels 121 and fourth flow channels 122 are offset by 45° in the circumferential direction.

[0036] And / or, please refer to Figures 3-6 At least one of the fifth flow channel 131 and the sixth flow channel 141 is configured to include a first segment 31, a second segment 32, and a third segment 33, wherein the second segment 32 extends circumferentially in an annular shape, the first segment 31 is connected to the radially inner side of the second segment 32, and the third segments 33 are multiple segments spaced apart circumferentially, each of the third segments 33 being connected to the radially outer side of the second segment 32. As an example, the fifth flow channel 131 is configured to include a first segment 31, a second segment 32, and a third segment 33, with each third segment 33 of the fifth flow channel 131 connected to a corresponding third flow channel 121; or, the sixth flow channel 141 is configured to include a first segment 31, a second segment 32, and a third segment 33, with each third segment 33 of the sixth flow channel 141 connected to a corresponding fourth flow channel 122; or, both the fifth flow channel 131 and the sixth flow channel 141 are configured to include a first segment 31, a second segment 32, and a third segment 33.

[0037] For example, the fifth flow channel 131 is configured to include a first section 31, a second section 32, and a third section 33. The oil in the first flow channel 112 can flow in from the first section 31 of the fifth flow channel 131, flow through the second section 32 of the fifth flow channel 131 to the third section 33 of the fifth flow channel 131, and then flow through the third section 33 of the fifth flow channel 131 to the third flow channel 121. As another example, the sixth flow channel 141 is configured to include a first section 31, a second section 32, and a third section 33. The oil in the second flow channel 113 can flow in from the first section 31 of the sixth flow channel 141, flow through the second section 32 of the sixth flow channel 141 to the third section 33 of the sixth flow channel 141, and then flow through the third section 33 of the sixth flow channel 141 to the fourth flow channel 122.

[0038] As can be seen, the structures of the first segment 31, the second segment 32, and the third segment 33 are relatively simple and easy to manufacture. Furthermore, by setting the annular second segment 32, the first segment 31 and the third segment 33 can be connected through the annular second segment 32. Therefore, the number of the first segment 31 and the third segment 33 can be different. That is, the number of the first flow channel 112 or the second flow channel 113 can be different from the number of the third segment 33. Even if the number of the first flow channel 112 and / or the second flow channel 113 is less than the number of the corresponding third segment 33, the oil can still be distributed to multiple third segments 33 through the second segment 32. This reduces the requirement for the number of the first flow channel 112 and / or the second flow channel 113, so that the rotor shaft 11 does not need to be machined with too many flow channels, and the rotor shaft 11 can also have better structural strength, which is conducive to improving the reliability of the rotor assembly 1.

[0039] exist Figure 4 In the example, both the fifth flow channel 131 and the sixth flow channel 141 result in a first segment 31, a second segment 32, and a third segment 33. The first flow channel 112 and the second flow channel 113 each have two segments, while the third flow channel 121 and the fourth flow channel 122 each have four segments. In the fifth flow channel 131, there are two first segments 31 and four third segments 33. Similarly, in the sixth flow channel 141, there are two first segments 31 and four third segments 33. Furthermore, the angle between two adjacent third segments 33 in the fifth flow channel 131 and the angle between two adjacent third segments 33 in the sixth flow channel 141 are both 90°. Simultaneously, in the circumferential direction of the stator core 21, the angle between the third segment 33 in the fifth flow channel 131 and the third segment 33 in the adjacent sixth flow channel 141 is 45°, and the angle between the adjacent third flow channel 121 and the fourth flow channel 122 is also 45°.

[0040] Please refer to Figures 3-5In some embodiments, the first end plate 13 has a first oil outlet channel 132 spaced apart from the fifth flow channel 131, the first oil outlet channel 132 is connected to the fourth flow channel 122, and the first oil outlet channel 132 extends to the side of the first end plate 13 away from the rotor core 12; the second end plate 14 has a second oil outlet channel 142 spaced apart from the sixth flow channel 141, the second oil outlet channel 142 is connected to the third flow channel 121, and the second oil outlet channel 142 extends to the side of the second end plate 14 away from the rotor core 12.

[0041] As an example, the rotor assembly 1 can divide the oil flowing in from the inlet channel 111 into two streams. One stream flows through the first channel 112, through the fifth channel 131 to the third channel 121, and is discharged through the second outlet channel 142. The other stream flows through the second channel 113, through the sixth channel 141 to the second channel 113, and is discharged through the first outlet channel 132.

[0042] It is evident that the first oil outlet channel 132 and the second oil outlet channel 142 can both discharge through the axial direction of the rotor core 12, rather than from the radial direction. Combined with the fact that the third channel 121 and the fourth channel 122 also extend along the axial direction of the rotor core 12 and can both penetrate through both axial ends of the rotor core 12, the flow direction of the oil in the rotor core 12 can be axial and flow through the entire rotor core 12. When the rotor core 12 is formed by multiple rotor laminations stacked axially, the specifications of the rotor laminations can be reduced, which helps to keep the structural form of the rotor laminations in the rotor core 12 consistent. There is no need to use other types of rotor laminations at the axial ends of the rotor core 12, so as to reduce manufacturing difficulty and save manufacturing costs.

[0043] Furthermore, when the rotor assembly 1 is used in the motor 100, the rotor assembly 1 cooperates with the stator assembly 2. The stator assembly 2 includes a stator core 21 and a stator winding 22. The two axial ends of the stator winding 22 protrude from the two axial ends of the stator core 21, respectively. One axial end of the stator winding 22 protrudes from the first end plate 13 in a direction away from the second end plate 14, and the other axial end of the stator winding 22 protrudes from the second end plate 14 in a direction away from the first end plate 13. For an internal rotor motor, the stator assembly 2 is sleeved on the rotor core 100. Outside of sub-assembly 1, since the first oil outlet channel 132 extends to the side of the first end plate 13 away from the rotor core 12, and the second oil outlet channel 142 extends to the side of the second end plate 14 away from the rotor core 12, the oil flowing out from the first oil outlet channel 132 can be thrown towards one axial end of the stator winding 22 under the action of centrifugal force, and the oil flowing out from the second oil outlet channel 142 can be thrown towards the other axial end of the stator winding 22 under the action of centrifugal force, thereby achieving cooling of both axial ends of the stator winding 22.

[0044] Please refer to Figure 2 , Figure 5 and Figure 10 In some embodiments, the rotor shaft 11 has an output section 114, which is separated from the oil inlet channel 111. The output section 114 can be connected to other components to enable the motor 100 to output power to the outside. By separating the output section 114 from the oil inlet channel 111, the oil in the oil inlet channel 111 is less likely to come into contact with the output section 114, thus not affecting the operation of the output section 114. Furthermore, external impurities at the output section 114 are less likely to enter the oil inlet channel 111, thus not affecting the heat dissipation of the rotor assembly 1, thereby improving the reliability of the rotor assembly 1.

[0045] As an example, rotor assembly 1 is used in motor 100. When motor 100 is used in a vehicle, it can be connected to a transmission. The oil in the transmission flows through output section 114. Typically, the transmission oil is viscous and contains many impurities. This application separates output section 114 from oil inlet channel 111 to prevent transmission oil from easily entering the inlet channel 111, thus minimizing interference with oil flow in rotor assembly 1, reducing interference with heat dissipation of rotor assembly 1, and improving the reliability of rotor assembly 1. Figure 2 and Figure 5 In the example, the output section 114 is a spline formed in the rotor shaft 11.

[0046] In some examples, the gearbox contains meshing gears, and its cleanliness is worse than that of the motor 100, containing more impurities. If impurities from the gearbox enter the motor 100 with the oil, it will affect the lifespan of the motor 100. Furthermore, the gearbox and motor 100 have different requirements for oil properties, making it difficult to achieve the optimal solution when using the same type of oil. Therefore, this application reduces the limitations on oil type by separating the output section 114 from the oil inlet channel 111, and is less likely to affect the lifespan of the motor 100.

[0047] And / or, please refer to Figure 2 The oil inlet channel 111 extends axially and passes through the axial end of the rotor shaft 11 away from the output part 114. When the rotor assembly 1 is used in the motor 100, the oil inlet channel 111 facilitates communication between the oil inlet path and other channels in the motor 100 (such as the oil injection element 42 mentioned later). At the same time, the structure of the oil inlet channel 111 is relatively simple and easy to manufacture.

[0048] Please refer to Figures 2-6In some embodiments, the rotor shaft 11 has a first mounting portion 115 and a second mounting portion 116, which are axially spaced apart and are respectively used to mount bearings 15. The first mounting portion 115 is located on the side of the first end plate 13 opposite to the second end plate 14, and the second mounting portion 116 is located on the side of the second end plate 14 opposite to the first end plate 13. The rotor shaft 11 has a seventh flow channel 117 and an eighth flow channel 118, which are spaced apart and are respectively connected to the oil inlet flow. The outlet of the seventh flow channel 117 is located near the first mounting part 115 so that the oil at the outlet of the seventh flow channel 117 can dissipate heat and lubricate the bearing 15 at the first mounting part 115. The outlet of the eighth flow channel 118 is located near the second mounting part 116 so that the oil at the outlet of the eighth flow channel 118 can dissipate heat and lubricate the bearing 15 at the second mounting part 116. That is, the rotor assembly 1 of this application can not only dissipate heat from the rotor shaft 11 and the rotor core 12, but also dissipate heat from the bearing 15, so that the components in the rotor assembly 1 are not prone to overheating, thereby improving the reliability of the rotor assembly 1.

[0049] As an example, during the rotation of the rotor shaft 11, the outlet of the seventh flow channel 117 is positioned near the first mounting portion 115, and the outlet of the eighth flow channel 118 is positioned near the second mounting portion 116, so that the oil flowing through the outlets of the seventh flow channel 117 and the eighth flow channel 118 can be thrown towards the corresponding bearing 15, thereby cooling the bearing 15. In some examples, the outlet of the seventh flow channel 117 and the corresponding bearing 15 are spaced apart along the axial direction of the rotor core 12, and the outlet of the eighth flow channel 118 and the corresponding bearing 15 are also spaced apart along the axial direction of the rotor core 12.

[0050] According to a second aspect of the present invention, the motor 100 includes a housing assembly 4 and a rotor assembly 1 according to a first aspect of the present invention. The housing assembly 4 includes a housing 41 and an oil injector 42. The oil injector 42 is disposed at one axial end inside the housing 41. The rotor assembly 1 is disposed inside the housing 41. The oil injector 42 is connected to an oil inlet channel 111.

[0051] According to the embodiment of the present invention, the rotor assembly 1 of the motor 100 can achieve more comprehensive heat dissipation, so as to improve the reliability of the motor 100.

[0052] As an example, the fuel injector 42 is formed as a tubular structure and extends axially. The fuel injector 4 extends into the oil inlet channel 111 and is radially spaced from the wall of the oil inlet channel 111.

[0053] Please refer to Figure 1 , Figure 2 , Figure 7and Figure 8 In some embodiments, the housing 41 includes a base 411 and an end cap component 412. The end cap component 412 is disposed at one axial end of the base 411 and has an arrangement space 4123 for passing through the resolver wire of the motor 100. The oil injector 42 is fixed to the end cap component 412. The base 411 has a ninth flow channel 4111, which is provided with at least one filter 43. The end cap component 412 has a tenth flow channel 4124, through which the oil injector 42 is connected to the ninth flow channel 4111.

[0054] As can be seen, the resolver can be connected to other components to achieve electrical connection between the motor 100 and other components, thereby controlling the operation of the motor 100. By placing the resolver within the arrangement space 4123, a certain degree of protection can be provided for the resolver, making it less susceptible to damage and improving the reliability of the motor 100. For example, the resolver can be a low-voltage wiring harness of the motor 100.

[0055] As an example, end cap component 412 includes a first end cap 4121 and a second end cap 4122. The second end cap 4122 is disposed on the side of the first end cap 4121 opposite to the base 411, and an arrangement space 4123 is defined between the first end cap 4121 and the second end cap 4122. The oil injector 42 is fixedly disposed on the second end cap 4122. The tenth flow channel 4124 includes a seventh segment 4124a and an eighth segment 4124b. The seventh segment 4124a is formed on the first end cap 4121 and communicates between the ninth flow channel 4111 and the eighth segment 4124b. The eighth segment 4124b is formed on the second end cap 4122 and communicates with the oil injector 42. In some examples, the outer peripheral wall of the oil injector 42 has external threads, and the second end cap 4122 has internal threads. The oil injector 42 and the second end cap 4122 are connected by threads.

[0056] In addition, the oil injection component 42 is connected to the ninth flow channel 4111 through the tenth flow channel 4124. That is, when the oil needs to flow from the tenth flow channel 4124 to the oil injection component 42, it needs to pass through the ninth flow channel 4111 first. At this time, the filter 43 can filter the oil flowing to the oil injection component 42, so that the oil flowing from the oil injection component 42 to the oil inlet flow channel 111 is cleaner and less likely to affect the rotation of the rotor assembly 1, which helps to improve the service life of the motor 100.

[0057] It is understood that one, two or more filters 43 may be provided in the ninth flow channel 4111, and this application does not impose any restrictions on this.

[0058] Please refer to Figures 7-9In some embodiments, the housing 41 has an installation cavity 413 and a holding cavity 414. The rotor assembly 1 is disposed in the installation cavity 413, and the holding cavity 414 is located below the installation cavity 413 and is used to hold the heat exchange medium. The two axial ends of the installation cavity 413 are respectively connected to the holding cavity 414. The housing 41 has a third mounting part 415 for mounting the drive pump 47 and a fourth mounting part 416 for mounting the cooler 46. The housing 41 has a ninth flow channel 4111. The third mounting part 415 and the fourth mounting part 416 divide the ninth flow channel 4111 into a fourth segment 34, a fifth segment 35 and a sixth segment 36. The fourth segment 34 connects the holding cavity 414 and the third mounting part 415. The fifth segment 35 connects the third mounting part 415 and the fourth mounting part 416. The sixth segment 36 connects the fourth mounting part 416 and the oil injection component 42.

[0059] As an example, the drive pump 47 is installed in the third mounting part 415, the cooler 46 is installed in the fourth mounting part 416, and the cooler 46 is a heat exchanger that can cool the oil flowing through it so that the cooled oil can dissipate heat from the motor 100. The fourth section 34 can be connected between the holding chamber 414 and the inlet of the drive pump 47, the fifth section 35 can be connected between the outlet of the drive pump 47 and the inlet of the cooler 46, and the sixth section 36 can be connected between the outlet of the cooler 46 and the oil injection component 42.

[0060] As can be seen, the drive pump 47 can provide power to the oil in the ninth flow channel 4111, thereby driving the oil to circulate within the housing 41. The axial ends of the mounting cavity 413 are respectively connected to the holding cavity 414, so that the oil after cooling the rotor assembly 1 can flow back to the holding cavity 414. For example, the oil flowing out of the first oil outlet channel 132, the second oil outlet channel 142, the seventh flow channel 117, and the eighth flow channel 118 mentioned above can flow back to the holding cavity 414, realizing the recycling of the oil. For example, when the motor 100 also includes a stator assembly 2, the stator assembly 2 includes a stator core 21, a stator winding 22, and an oil spray ring 23. The oil spray ring 23 can spray oil onto the stator winding 22 for heat dissipation, and the oil sprayed by the oil spray ring 23 can flow back to the holding cavity 414, realizing the recycling of the oil.

[0061] Furthermore, when the ninth flow channel 4111 is provided with a filter 43, the filter 43 can be located in the fourth section 34, the fifth section 35, or the sixth section 36, all of which can satisfy the requirement of filtering the oil flowing from the drive pump 47 to the fuel injector 42; when the ninth flow channel 4111 is provided with two filters 43, the two filters 43 can be located in the fourth section 34 and the sixth section 36 respectively, so as to perform dual filtration of the oil flowing from the holding chamber 414 to the fuel injector 42; when the ninth flow channel 4111 is provided with three filters 43, the three filters 43 can be located in the fourth section 34, the fifth section 35, and the sixth section 36 respectively, so as to perform multiple filtration of the oil flowing from the holding chamber 414 to the fuel injector 42.

[0062] In some examples, the ninth flow channel 4111 is provided with a first filter and a second filter. The first filter is located in the fourth section 34 and the second filter is located in the sixth section 36. The first filter uses suction filtration and the second filter uses pressure filtration to make the oil flowing from the holding chamber 414 to the oil injection component 42 cleaner, which is beneficial to improving the service life of the motor 100.

[0063] Please refer to Figures 7-11 In some embodiments, the motor 100 includes a stator assembly 2, which is nested inside and outside the rotor assembly 1. The stator assembly 2 includes a stator core 21, a stator winding 22, and an oil injection ring 23. The stator winding 22 is wound around the stator core 21. Oil injection rings 23 are respectively provided at both axial ends of the stator core 21, corresponding to the portions of the stator winding 22 protruding from the stator core 21. The stator core 21 has an eleventh flow channel 211 to connect two oil injection rings 23. The housing 41 has a ninth flow channel 4111 communicating with one of the oil injection rings 23. As an example, the motor 100 is an inner rotor motor 100, with the stator assembly 2 sleeved outside the rotor assembly 1; or, the motor 100 is an outer rotor motor 100, with the rotor assembly 1 sleeved outside the stator assembly 2.

[0064] As can be seen, the ninth flow channel 4111 can direct at least a portion of the oil to one of the aforementioned oil injection rings 23, and the eleventh flow channel 211 connects the two oil injection rings 23, thereby facilitating heat dissipation for the stator core 21 and stator winding 22. This prevents localized overheating of the stator assembly 2 during motor 100 operation, thus improving the reliability of the motor 100. As an example, the ninth flow channel 4111 can direct a portion of the oil to one of the aforementioned oil injection rings 23, and the ninth flow channel 4111 can also direct a portion of the oil to the other oil injection ring 23 via the eleventh flow channel 211.

[0065] In some examples, the eleventh flow channel 211 may be formed on the surface of the stator core 21; and / or, the eleventh flow channel 211 may be formed inside the stator core 21. It is understood that there may be one or more eleventh flow channels 211, and this application is not limited thereto. Figure 11 In the example, the eleventh flow channel 211 has sixty-six channels.

[0066] Please refer to Figures 7-13 In some embodiments, the stator assembly 2 includes: a stator core 21, a stator winding 22, a first oil injection ring 231, and a second oil injection ring 232. The stator core 21 has an eleventh flow channel 211. The stator winding 22 is wound around the stator core 21. The first oil injection ring 231 and the second oil injection ring 232 are respectively disposed at both axial ends of the stator core 21. The first oil injection ring 231 has a first oil injection flow channel 2311 and the first oil injection ring 231 is connected to the first oil injection flow channel 2311. The first nozzle 311 is connected to the second oil injection ring 232, which is provided with a second oil injection channel 2321 and a second nozzle connected to the second oil injection channel 2321. The first nozzle and the second nozzle are respectively opposite to the part of the stator winding 22 that protrudes from the stator core 21. The eleventh channel 211 is connected to the first oil injection channel 2311 and the second oil injection channel 2321. The housing 41 has a ninth channel 4111 that is connected to one of the oil injection rings 23.

[0067] As can be seen, the first and second nozzles are respectively positioned opposite the portions of the stator winding 22 that protrude from the stator core 21, so that the cooling medium flowing out through the first and second nozzles can effectively dissipate heat from these portions of the stator winding 22. Furthermore, the eleventh flow channel 211 connects the first oil injection channel 2311 and the second oil injection channel 2321. For example, the eleventh flow channel 211 extends axially along the stator core 21, allowing it to dissipate heat from the stator core 21. Therefore, the cooling medium in the stator flow channels can dissipate heat not only from the stator core 21 but also from the stator winding 22, preventing overheating damage to the stator assembly 2 and improving the reliability of the motor 100.

[0068] As an example, a portion of the cooling medium in the ninth flow channel 4111 can flow to one of the first injection flow channel 2311 and the second injection flow channel 2321, and another portion of the cooling medium in the ninth flow channel 4111 can flow through the eleventh flow channel 211 to the other of the first injection flow channel 2311 and the second injection flow channel 2321, so as to achieve more comprehensive heat dissipation for the stator assembly 2.

[0069] Please refer to Figures 7-13In some embodiments, one end face of the stator core 21 is a first end face 212, the inner wall of the mounting cavity 413 has a first limiting surface 417, the first oil injection ring 231 is axially positioned between the first end face 212 and the first limiting surface 417, and the first oil injection ring 231 is sealed to the first end face 212 and the inner wall of the mounting cavity 413 respectively, so as to define a first oil injection channel 2311 between the first oil injection ring 231, the stator core 21 and the housing assembly 4, the end of the first oil injection ring 231 away from the stator core 21 has a limiting protrusion 2312, the inner wall of the mounting cavity 413 has a limiting groove 419, the bottom wall of the limiting groove 419 has a connecting hole communicating with the main channel, the limiting protrusion 2312 is circumferentially positioned in the limiting groove 419, and the limiting protrusion 2312 avoids the connecting hole.

[0070] As an example, the first oil injection ring 231 is sandwiched between the first end face 212 and the first limiting surface 417. The first oil injection ring 231 and the first end face 212 are axially sealed by the first sealing element, and the first oil injection ring 231 and the inner wall of the mounting cavity 413 are radially sealed by the second sealing element, so that the first oil injection channel 2311 defined between the first oil injection ring 231, the stator core 21 and the housing assembly 4 is more stable and less prone to accidental leakage.

[0071] It can be seen that by using the limiting protrusion 2312 in conjunction with the limiting groove 419, the rotation of the first oil injection ring 231 in the circumferential direction can be restricted, so that the setting of the first oil injection ring 231 is more stable; and the connecting hole avoids the limiting protrusion 2312, that is, the limiting protrusion 2312 is less likely to affect the flow of the cooling medium to the first oil injection channel 2311, and is less likely to affect the heat dissipation of the stator winding 22, which facilitates the improvement of the reliability of the motor 100.

[0072] Please refer to Figures 7-12 In some embodiments, the end face of one axial end of the stator core 21 is a first end face 212, the inner wall of the mounting cavity 413 has a first limiting surface 417, the first oil injection ring 231 is axially limited and fitted between the first end face 212 and the first limiting surface 417, the end face of the other axial end of the stator core 21 is a second end face 213, the inner wall of the mounting cavity 413 has a second limiting surface 418, the second oil injection ring 232 is fixed to the second limiting surface 418 by fasteners (e.g., screws, bolts), the second oil injection ring 232 and the second end face 213 are axially sealed by a third sealing element, and the second oil injection ring 232 and the inner wall of the mounting cavity 413 are radially sealed by a fourth sealing element, so that the second oil injection channel 2321 defined between the second oil injection ring 232, the stator core 21 and the housing assembly 4 is more stable and less prone to accidental leakage.

[0073] In some embodiments, a locking protrusion is formed on the outer periphery of the stator core 21, and a locking groove is formed on the inner wall of the mounting cavity 413. The locking protrusion is positioned and engaged with the locking groove in the circumferential direction. By setting the locking protrusion and the locking groove, a clear installation position is provided for the stator core 21, so that the position of the stator core 21 in the mounting cavity 413 is more clear, so that the position of the wire harness on the stator assembly 2 can also be more stable, which can play a role in preventing mistakes and reduce the assembly difficulty of the motor 100.

[0074] Please refer to Figure 1 , Figure 2 and Figures 7-11 In some embodiments, the housing 41 includes a base 411 and an end cap component 412. The end cap component 412 is disposed at one axial end of the base 411, and the oil injector 42 is fixedly disposed on the end cap component 412. The base 411 has a ninth flow channel 4111, and the end cap component 412 has a tenth flow channel 4124. The oil injector 42 is connected to the ninth flow channel 4111 through the tenth flow channel 4124.

[0075] The housing 41 has an installation cavity 413 and a holding cavity 414. The rotor assembly 1 and the stator assembly 2 are both located in the installation cavity 413. The holding cavity 414 is located below the installation cavity 413 and is used to hold oil. The two axial ends of the installation cavity 413 are respectively connected to the holding cavity 414. The housing 41 has a third mounting part 415 for mounting the drive pump 47 and a fourth mounting part 416 for mounting the cooler 46. The third mounting part 415 and the fourth mounting part 416 divide the ninth flow channel 4111 into a fourth section 34, a fifth section 35 and a sixth section 36. The fourth section 34 connects the holding cavity 414 and the third mounting part 415. The fifth section 35 connects the third mounting part 415 and the fourth mounting part 416. The sixth section 36 connects the fourth mounting part 416 and the oil injection component 42.

[0076] The motor 100 also includes a stator assembly 2, which is sleeved outside the rotor assembly 1. The stator assembly 2 includes a stator core 21, a stator winding 22, and an oil injection ring 23. The stator winding 22 is wound around the stator core 21. The two axial ends of the stator core 21 are respectively provided with oil injection rings 23 opposite to the portion of the stator winding 22 protruding from the stator core 21. The stator core 21 has an eleventh flow channel 211 to connect two oil injection rings 23. One of the oil injection rings 23 is connected to the sixth section 36. The ninth flow channel 4111 is provided with a first filter and a second filter. The first filter is located in the fourth section 34, and the second filter is located in the sixth section 36. The second filter is used to filter the oil flowing from the sixth section 36 to the oil injection component 42 and the oil injection ring 23.

[0077] In some examples, the sixth segment 36 can direct a portion of the oil to the injection element 42, and also direct a portion of the oil to one of the aforementioned injection rings 23. Simultaneously, the sixth segment 36 can also direct a portion of the oil through the eleventh flow channel 211 to the other injection ring 23. Combined with the first and second filters, this ensures that the oil flowing to the rotor assembly 1 and stator assembly 2 is cleaner, which helps to extend the service life of the rotor assembly 1 and stator assembly 2, thereby extending the service life of the motor 100. Furthermore, the axial ends of the mounting cavity 413 are connected to the holding cavity 414, allowing the oil used to cool the rotor assembly 1 and stator assembly 2 to flow back to the holding cavity 414, facilitating oil recycling and reducing operating costs.

[0078] A vehicle according to a third aspect of the present invention includes a motor 100 according to a second aspect of the present invention.

[0079] According to the vehicle of the present invention, the motor 100 described above has good reliability, which facilitates the improvement of vehicle reliability. It is understood that the specific type of vehicle referred to in the embodiments of this application is not limited. For example, the vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, range-extended electric vehicles, solar electric vehicles, gas fuel vehicles (e.g., hydrogen engine vehicles), or biofuel vehicles (e.g., vehicles powered by ethanol, biodiesel, etc.).

[0080] Other configurations and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0081] Furthermore, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not describe the various possible combinations separately. In addition, various different embodiments of this application can also be arbitrarily combined, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

[0082] In the description of this invention, it should be understood that the terms "center," "lateral," "length," "thickness," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0083] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotor assembly, characterized in that, include: The rotor shaft has an oil inlet channel, a first channel, and a second channel, wherein the first channel and the second channel are spaced apart and are respectively connected to the oil inlet channel; The rotor core is disposed on the outer circumferential side of the rotor shaft and has a third flow channel and a fourth flow channel, the third flow channel and the fourth flow channel being circumferentially spaced and both extending axially; A first end plate is disposed at one axial end of the rotor core and has a fifth flow channel, wherein the third flow channel is connected to the first flow channel through the fifth flow channel; The second end plate is located at the other axial end of the rotor core and has a sixth flow channel, wherein the fourth flow channel is connected to the second flow channel through the sixth flow channel.

2. The rotor assembly according to claim 1, characterized in that, The third flow channel and the fourth flow channel are each multiple, and the multiple third flow channels and the multiple fourth flow channels are alternately arranged along the circumferential direction; and / or, At least one of the fifth and sixth flow channels is configured to include a first segment, a second segment, and a third segment, wherein the second segment extends circumferentially in a ring shape, the first segment is connected to the radially inner side of the second segment, and the third segment consists of multiple segments spaced apart circumferentially and all connected to the radially outer side of the second segment.

3. The rotor assembly according to claim 1, characterized in that, The first end plate has a first oil outlet channel spaced apart from the fifth flow channel. The first oil outlet channel communicates with the fourth flow channel and extends through to the side of the first end plate opposite to the rotor core. The second end plate has a second oil outlet channel spaced apart from the sixth flow channel. The second oil outlet channel communicates with the third flow channel and extends through to the side of the second end plate opposite to the rotor core.

4. The rotor assembly according to claim 1, characterized in that, The rotor shaft has an output section at one axial end, which is separated from the oil inlet channel. The oil inlet channel passes through the other axial end of the rotor shaft.

5. The rotor assembly according to any one of claims 1-4, characterized in that, The rotor shaft has a first mounting portion and a second mounting portion, which are axially spaced and respectively used for mounting bearings. The first mounting portion is located on the side of the first end plate opposite to the second end plate, and the second mounting portion is located on the side of the second end plate opposite to the first end plate. The rotor shaft has a seventh flow channel and an eighth flow channel, which are spaced apart and connected to the oil inlet flow channel. The outlet of the seventh flow channel is located near the first mounting part, and the outlet of the eighth flow channel is located near the second mounting part.

6. An electric motor, characterized in that, include: A housing assembly, the housing assembly including a housing and an oil injector, the oil injector being disposed at one axial end within the housing; The rotor assembly is the rotor assembly according to any one of claims 1-5, and is disposed within the housing, wherein the oil injection element is connected to the oil inlet channel.

7. The motor according to claim 6, characterized in that, The housing includes a base and an end cover component. The end cover component is located at one axial end of the base and has a space for the resolver wire of the motor to pass through. The oil injection component is fixed to the end cover component. The base has a ninth flow channel, which is provided with at least one filter. The end cap component has a tenth flow channel, and the oil injector is connected to the ninth flow channel through the tenth flow channel.

8. The motor according to claim 6, characterized in that, The housing has an installation cavity and a holding cavity. The rotor assembly is located in the installation cavity, and the holding cavity is located below the installation cavity and is used to hold the heat exchange medium. The two axial ends of the installation cavity are respectively connected to the holding cavity. The housing has a third mounting portion for mounting a drive pump and a fourth mounting portion for mounting a cooler. The housing has a ninth flow channel. The third and fourth mounting portions divide the ninth flow channel into a fourth segment, a fifth segment, and a sixth segment. The fourth segment connects the holding chamber and the third mounting portion. The fifth segment connects the third mounting portion and the fourth mounting portion. The sixth segment connects the fourth mounting portion and the fuel injector.

9. The motor according to any one of claims 6-8, characterized in that, include: The stator assembly is nested with the rotor assembly and includes a stator core, stator windings, and oil injection rings. The stator windings are wound around the stator core. The stator core has oil injection rings at both axial ends, which are opposite to the portions of the stator windings that protrude from the stator core. The stator core has an eleventh flow channel to connect two of the oil injection rings. The housing has a ninth flow channel that communicates with one of the oil injection rings.

10. A vehicle, characterized in that, Includes the motor according to any one of claims 6-9.

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