Electric machine and power assembly and vehicle having the same

Abstract

The application provides a motor, a power assembly and a vehicle with the motor, comprising: a casing, an oil inlet is formed on the casing; a stator core, a plurality of cooling flow channels are arranged on the stator core, part of the plurality of cooling flow channels are formed as first flow channels and the other part are formed as second flow channels; two oil rings, the two oil rings are a first oil ring and a second oil ring respectively, a first channel and a second channel are formed on the two oil rings, and the first channels of the two oil rings are communicated with the oil inlet, wherein the first flow channels are connected between the first channel of the second oil ring and the second channel of the first oil ring, and the second flow channels are connected between the first channel of the first oil ring and the second channel of the second oil ring. According to the motor, the first flow channels and the second flow channels are arranged on the stator core, the cooling medium can fully exchange heat with both ends of the axial direction of the stator core, the stator core can be effectively protected, and the service life of the motor can be improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle manufacturing technology, and in particular to an electric motor, a powertrain having the same, and a vehicle. Background Technology

[0002] In the existing solution, the cooling medium in the motor only exchanges heat with the stator core. When the motor runs for a long time, thermal stress concentration is likely to occur in the stator core, which can lead to stator core failure and inability to operate, thereby reducing the service life 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 provides an electric motor that can extend the service life of the motor.

[0004] The present invention also proposes a powertrain having the above-mentioned motor.

[0005] The present invention also proposes a vehicle having the above-described powertrain.

[0006] According to a first aspect of the present invention, an electric motor includes: a housing having an oil inlet; a stator core disposed within the housing, the stator core having a plurality of cooling channels extending axially along the stator core and spaced apart circumferentially, a portion of the plurality of cooling channels forming a first channel and another portion forming a second channel; and two oil rings, the two oil rings being a first oil ring and a second oil ring, respectively disposed on opposite sides of the stator core in the axial direction, each of the two oil rings having a first channel and a second channel, the first channels of the two oil rings communicating with the oil inlet, wherein the first channel connects between the first channel of the second oil ring and the second channel of the first oil ring, and the second channel connects between the first channel of the first oil ring and the second channel of the second oil ring.

[0007] According to the present invention, a first flow channel and a second flow channel are provided on the stator core, and the cooling medium can fully exchange heat with both ends of the stator core in the axial direction, thereby ensuring the heat exchange effect of the cooling medium on the stator core and effectively protecting the stator core, thereby improving the service life of the motor.

[0008] According to some embodiments of the present invention, there are two oil inlets, namely a first oil inlet and a second oil inlet, wherein the first oil inlet is connected to the first channel of the first oil ring, and the second oil inlet is connected to the second channel of the second oil ring.

[0009] According to some embodiments of the present invention, a plurality of first flow channels and a plurality of second flow channels are arranged alternately along the circumference of the stator core.

[0010] According to some embodiments of the present invention, the first oil ring has multiple first channels and the second oil ring has multiple second channels, which correspond one-to-one with and are connected to multiple second channels; the second oil ring has multiple first channels and the first oil ring has multiple second channels, which correspond one-to-one with and are connected to multiple first channels.

[0011] According to some alternative embodiments of the present invention, the inner side of the oil ring defines a spray chamber, which communicates with the second channel in the same oil ring.

[0012] According to some embodiments of the present invention, the housing and the oil ring cooperate to define a first cavity, the first cavity being located radially outside the spray cavity, and a plurality of the first channels communicating with the oil inlet through the first cavity.

[0013] According to some embodiments of the present invention, the oil ring includes: a side plate extending radially along the stator core and extending annularly in the circumferential direction of the stator core; a first plate connected to the side plate facing the stator core, the first plate extending axially along the stator core and extending annularly in the circumferential direction of the stator core, the spray cavity being formed radially inner to the first plate, and the first cavity being formed radially outer to the spray cavity.

[0014] According to some optional embodiments of the present invention, both the first channel and the second channel are formed on the first plate, and both the first channel and the second channel penetrate the end face of the first plate facing the stator core.

[0015] According to some alternative embodiments of the present invention, the first plate has a plurality of stops that protrude radially along the first plate, the plurality of stops being arranged circumferentially spaced along the first plate, and adjacent stops cooperating to define the first channel, the first channel being open on the radially outer side of the first plate.

[0016] According to some alternative embodiments of the present invention, in the radial direction of the stator core, the distance between the first channel and the central axis of the stator core is greater than the distance between the second channel and the central axis of the stator core.

[0017] According to some alternative embodiments of the present invention, the stop has a guide ramp formed on the radially outer surface of the first plate, the guide ramp extending radially inward along the first plate and inclined toward the first channel in the circumferential direction of the first plate.

[0018] According to some embodiments of the present invention, the first plate is provided with a connecting hole, one end of which passes through the peripheral wall of the second channel, and the other end passes through the inner peripheral surface of the first plate radially.

[0019] According to some embodiments of the present invention, the second channel is formed by a radial outward recess from the inner circumferential surface of the first plate, and / or the second channel is open on the inner side of the first plate in the radial direction.

[0020] According to some embodiments of the present invention, the oil ring further includes: a second plate, the second plate being connected to the side of the side plate facing the stator core and extending axially along the stator core, the second plate extending circumferentially along the stator core in an annular shape, the second plate being disposed radially inside the first plate, the side plate, the first plate and the second plate defining the spray cavity.

[0021] According to some optional embodiments of the present invention, the side plate is provided with an oil outlet hole, which connects the spray chamber and the oil drain port of the motor.

[0022] According to some alternative embodiments of the present invention, the oil outlet hole extends through the side plate along the axial direction of the oil ring.

[0023] According to some optional embodiments of the present invention, there are multiple oil outlet holes, and the multiple oil outlet holes are arranged at intervals on the side plate.

[0024] According to some optional embodiments of the present invention, the axis of the stator core extends in a horizontal direction, and the plurality of oil outlet holes include: a first hole and a second hole, the diameter of the first hole is larger than the diameter of the second hole, the first hole and the second hole are arranged at intervals in the vertical direction, and the first hole is located above the second hole in the vertical direction.

[0025] According to some embodiments of the present invention, the motor further includes: a winding wound on the stator core, a portion of the winding extending beyond the stator core along the axial direction of the stator core to form a winding end of the winding, the winding end being located within the spray chamber of the oil ring.

[0026] The powertrain according to a second aspect of the present invention includes an electric motor according to a first aspect of the present invention.

[0027] According to the power assembly of the present invention, by providing a motor according to the first aspect embodiment above, a first flow channel and a second flow channel are provided on the stator core, and the cooling medium can fully exchange heat with both ends of the stator core in the axial direction, thereby ensuring the heat exchange effect of the cooling medium on the stator core, and at the same time, effectively protecting the stator core, thereby improving the service life of the motor.

[0028] A vehicle according to a third aspect of the present invention includes an electric motor according to a first aspect of the present invention or a powertrain according to a second aspect of the present invention.

[0029] According to the vehicle of the present invention, by providing the powertrain of the second aspect embodiment or the motor of the first aspect embodiment, and providing a first flow channel and a second flow channel on the stator core, the cooling medium can fully exchange heat with both ends of the stator core in the axial direction, thereby ensuring the heat exchange effect of the cooling medium on the stator core, and at the same time, effectively protecting the stator core, thereby improving the service life of the motor.

[0030] 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

[0031] Figure 1 This is a schematic diagram of a motor according to an embodiment of the present invention;

[0032] Figure 2 It is along Figure 1 Sectional view of line AA in the middle;

[0033] Figure 3 yes Figure 2 A magnified view of a section at point B in the middle;

[0034] Figure 4 yes Figure 2 A magnified view of a section at point C;

[0035] Figure 5 yes Figure 1 A schematic diagram of part of the structure of the motor shown;

[0036] Figure 6 yes Figure 5 A schematic diagram of part of the structure of the motor shown;

[0037] Figure 7 yes Figure 1 A schematic diagram of the first embodiment of the oil ring shown;

[0038] Figure 8 yes Figure 7 A schematic diagram of the first oil ring shown;

[0039] Figure 9 It is along Figure 8 Sectional view of the DD line;

[0040] Figure 10 yes Figure 1 A schematic diagram of the motor shown;

[0041] Figure 11 yes Figure 10 A schematic diagram of a second embodiment of the oil ring shown;

[0042] Figure 12 yes Figure 11 A schematic diagram of the first oil ring shown.

[0043] Figure label:

[0044] 100. Electric motor;

[0045] 10. Housing; 11. Oil inlet; 111. First oil inlet hole; 112. Second oil inlet hole; 12. Oil drain hole;

[0046] 20. Stator core; 21. Cooling channel; 211. First channel; 212. Second channel;

[0047] 30. Oil ring; 31. Side plate; 311. Oil outlet; 3111. First hole; 3112. Second hole; 32. First plate; 321. First channel; 322. Second channel; 323. Stop block; 3231. Guide slope; 324. Connecting hole; 33. First cavity; 34. Spray cavity; 35. Second plate;

[0048] 301, First oil ring; 302, Second oil ring;

[0049] 40. Winding. Detailed Implementation

[0050] Embodiments of the present invention are described in detail below, examples of which are illustrated 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0051] The following is a reference appendix. Figure 1-10 A motor 100 according to an embodiment of the present invention is described.

[0052] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 According to a first aspect of the present invention, the motor 100 includes: a housing 10, a stator core 20, and two oil rings 30.

[0053] Specifically, an oil inlet 11 is formed on the housing 10; the stator core 20 is disposed inside the housing 10, and the stator core 20 is provided with multiple cooling channels 21, that is, the stator core 20 may be provided with two, three, four or more cooling channels 21, all of which extend along the axial direction of the stator core 20 and are arranged at intervals in the circumferential direction of the stator core 20, and a portion of the multiple cooling channels 21 forms a first channel 211 and another portion forms a second channel 212; two oil rings 30 are respectively a first oil ring 301 and a second oil ring 302, and are respectively disposed on both sides of the stator core 20 in the axial direction (e.g. Figure 1 (Showing the stator core 20 on the left and right sides), each of the two oil rings 30 has a first channel 321 and a second channel 322. The first channel 321 of both oil rings 30 is connected to the oil inlet 11. The first flow channel 211 is connected between the first channel 321 of the second oil ring 302 and the second channel 322 of the first oil ring 301, and the second flow channel 212 is connected between the first channel 321 of the first oil ring 301 and the second channel 322 of the second oil ring 302.

[0054] For example, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, the housing 10 extends in the left-right direction, the oil inlet 11 is located on the upper side of the housing 10, the stator core 20 extends in the left-right direction and is located inside the housing 10, and the stator core 20 is provided with multiple cooling channels 21 extending in the left-right direction. The multiple cooling channels 21 are arranged at intervals around the circumference of the stator core 20. A first oil ring 301 is provided on the right side of the stator core 20, and a second oil ring 302 is provided on the left side of the stator core 20. It can be understood that most of the cooling channels 21 can be formed as the first channel 211 and a small part can be formed as the second channel 212, or most of the cooling channels 21 can be formed as the second channel 212 and a small part can be formed as the first channel 211, or the number of first channels 211 and second channels 212 can be equal.

[0055] The left end of the first flow channel 211 is connected to the first channel 321 of the second oil collecting ring 302, the first channel 321 of the second oil collecting ring 302 is connected to the oil inlet 11, the right end of the first flow channel 211 is connected to the second channel 322 of the first oil ring 301, the right end of the second flow channel 212 is connected to the first channel 321 of the first oil collecting ring 301, the first channel 321 of the first oil collecting ring 301 is connected to the oil inlet 11, and the left end of the second flow channel 212 is connected to the second channel 322 of the second oil ring 302.

[0056] When the motor 100 is running, the stator core 20 will generate heat due to prolonged operation. At this time, the cooling medium flows from the oil inlet of the housing 10 to the first channel 321 of the second oil collecting ring 302, and then flows through the first channel 321 to the first flow channel 211. After that, the cooling medium flows through the first flow channel 211 to the second channel 322 of the first oil ring 301. The coolant cools the windings near the first oil collecting ring 301 through the second channel 322. At the same time, the cooling medium can also flow from the oil inlet of the housing 10 to the first channel 321 of the first oil collecting ring 301, and then flow through the first channel 321 to the second flow channel 212. After that, the cooling medium flows through the second flow channel 212 to the second channel 322 of the second oil ring 302. The coolant cools the windings near the second oil collecting ring 302 through the second channel 322. The cooling medium sprays the ends of the windings 40 and the stator core 20 in the spray chamber 34 to achieve cooling of the motor 100.

[0057] In the existing solution, since the cooling channel 21 is only set on the stator core 20 in a single direction, the temperature of the cooling medium will gradually increase as the cooling medium flows along the cooling channel 21, which will cause the heat exchange effect of the cooling medium on the stator core 20 to gradually decrease, and thus the heat exchange effect of the cooling medium on the stator core 20 cannot be guaranteed.

[0058] The motor 100 of the present invention has a first flow channel 211 and a second flow channel 212 on the stator core 20. During the process of the cooling medium flowing from the first flow channel 211 to the first oil ring 301 and from the second flow channel 212 to the second oil ring 302, the cooling medium can effectively exchange heat with both ends of the stator core 20 in the left and right directions, thereby effectively ensuring the heat exchange effect. At the same time, it can avoid the cooling medium in a single flow direction from gradually heating up and affecting the cooling effect, thereby avoiding local high temperature of the stator core 20 and forming thermal stress concentration, effectively protecting the stator core 20, and thus effectively protecting the motor 100 and extending the service life of the motor 100.

[0059] In related technologies, to ensure that the stator core 20 is cooled at different outer diameter positions, two types of axial flow channels are provided in the different outer diameter regions of the stator core 20. The coolant in the first type of axial flow channel, which is radially outward, flows from the first end to the second end of the stator core 20, while the coolant in the second type of axial flow channel, which is radially inward, flows from the second end to the first end of the stator core 20. Since the oil ring 30 needs to be located outside the winding 40 and its position is fixed, a guide structure is also required to ensure that the coolant can enter the second type of axial flow channel, which is radially inward, so that the coolant can pass through the oil ring 30 and enter the axial flow channel.

[0060] Compared to related technologies, this solution does not require an additional flow-guiding structure, making the structure simpler. It directly utilizes the first channel 321 and the second channel 322 formed on the oil ring 30 to connect the oil inlet 11, the first channel 321 and the first flow channel 211 on one side of the oil ring 30 with the second channel 322 on the other side of the oil ring. At the same time, it connects the oil inlet 11, the first channel 321 and the second flow channel 212 on the other side of the oil ring 30 with the second channel 322 on one side of the oil ring 30, thereby ensuring the cooling of the stator core 20 through the countercurrent flow of coolant.

[0061] According to an embodiment of the present invention, the motor 100 has a first flow channel 211 and a second flow channel 212 on the stator core 20. The cooling medium can fully exchange heat with both ends of the stator core 20 in the axial direction, thereby ensuring the heat exchange effect of the cooling medium on the stator core 20. At the same time, it can effectively protect the stator core 20, thereby improving the service life of the motor 100.

[0062] According to some embodiments of the present invention, with reference to Figure 2 , Figure 3 , Figure 4 and Figure 5 There are two oil inlets 11, namely the first oil inlet 111 and the second oil inlet 112. The first oil inlet 111 is connected to the first channel 321 of the first oil ring 301, and the second oil inlet 112 is connected to the second channel 322 of the second oil ring 302. Therefore, the injection of cooling medium into the first oil ring 301 and the second oil ring 302 does not affect each other, and cooling medium can be added to the first oil ring 301 and the second oil ring 302 simultaneously, thereby ensuring the efficiency of cooling medium injection into the motor 100.

[0063] For example, such as Figure 2 and Figure 5 As shown, the first oil inlet 111 and the second oil inlet 112 are arranged alternately in the left and right direction. The oil inlet 11 on the left is the second oil inlet 112, and the oil inlet 11 on the right is the first oil inlet 111.

[0064] According to some embodiments of the present invention, with reference to Figure 5 and Figure 6 Multiple first flow channels 211 and multiple second flow channels 212 are located on the same circumferential position of the stator core 20.

[0065] It should be noted that in related technologies, the same end of the flow channels at the same circumferential position is often connected to the same chamber, which only allows the coolant to flow in the same direction in each flow channel, resulting in uneven cooling at both ends of the stator core at the same circumferential position. In this embodiment, the first flow channel 211 and the second flow channel 212 are at the same circumferential position, ensuring uniform cooling at both ends of the stator core 20 along the axial direction.

[0066] According to some embodiments of the present invention, with reference to Figure 5 and Figure 6 Multiple first flow channels 211 and multiple second flow channels 212 are arranged alternately along the circumference of the stator core 20. This arrangement can evenly divide the circumference of the stator core 20, thereby maximizing the heat exchange effect of the cooling medium on the ends of the stator core 20, effectively preventing thermal stress concentration at the ends of the stator core 20, and thus effectively protecting the stator core 20.

[0067] According to some embodiments of the present invention, with reference to Figure 3 , Figure 4 , Figure 5 and Figure 6 The first oil ring 301 has multiple first channels 321 and the second oil ring 302 has multiple second channels 322. That is, the first oil ring 301 has two, three, four or more first channels 321 and the second oil ring 302 has multiple second channels 322. They correspond one-to-one with and are connected to multiple second channels 212. The second oil ring 302 has multiple first channels 321 and the second oil ring 302 has multiple second channels 322. That is, the second oil ring 302 has two, three, four or more first channels 321 and the second channels 322 have multiple first channels 211.

[0068] In this way, multiple first flow channels 211 connect the first oil ring 301 and the second oil ring 302, and multiple second flow channels 212 connect the first oil ring 301 and the second oil ring 302, so that the coolant can cool the stator core 20 in the circumferential direction, thereby effectively preventing thermal stress concentration in the stator core 20 and effectively ensuring the service life of the motor 100.

[0069] For example, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the cooling medium can flow from the oil inlet 11 to the first channel 321 of the second oil ring 302, then flow through the first flow channel 211 to the second channel 322 of the first oil ring 301, and then flow through the second channel 322 to the spray chamber 34 of the first oil ring 301. At the same time, the cooling medium can also flow from the oil inlet 11 to the first channel 321 of the first oil ring 301, then flow through the second flow channel 212 to the second channel 322 of the second oil ring 302, and then flow through the second channel 322 to the spray chamber 34 of the second oil ring 302, thereby realizing the bidirectional flow of the cooling medium in the circumferential direction of the stator core 20.

[0070] According to some embodiments of the present invention, with reference to Figure 3 and Figure 4 The inner side of the oil ring 30 defines a spray chamber 34, which is connected to a second channel 322 in the same oil ring 30. Thus, coolant can flow through the second channel 322 to the spray chamber 34 of the same oil ring 30, thereby cooling the windings in the spray chamber 34 and effectively preventing high-temperature damage to the windings.

[0071] According to some embodiments of the present invention, with reference to Figure 2 , Figure 3 , Figure 4 and Figure 5 The housing 10 and the oil ring 30 cooperate to define a first cavity 33, which is located radially outside the spray chamber 34. Multiple first channels 321 communicate with the oil inlet 11 through the first cavity 33. Therefore, the first cavity 33 reduces the difficulty of fitting the oil inlet 11 and the first channels 321, thus facilitating the machining of the oil ring 30 and improving its machining efficiency. Simultaneously, the cooling medium can enter the first cavity 33 and then flow through the first channels 321 to the cooling channel 21, ensuring a uniform flow of the cooling medium to the cooling channel 21 and effectively preventing turbulent flow of the cooling medium within the first channel 211 from affecting heat exchange. Furthermore, the first cavity 33 is positioned appropriately, facilitating the flow of coolant from the oil inlet 11 to the first cavity 33.

[0072] According to some embodiments of the present invention, with reference to Figure 2 , Figure 3 , Figure 4 and Figure 5 The oil ring 30 includes a side plate 31 and a first plate 32. The side plate 31 extends radially along the stator core 20 and extends in a ring shape in the circumferential direction of the stator core 20. The first plate 32 is connected to the side of the side plate 31 facing the stator core 20. The first plate 32 extends axially along the stator core 20 and extends in a ring shape in the circumferential direction of the stator core 20. A spray chamber 34 is formed on the radial inner side of the first plate 32. A first cavity 33 is formed on the radial outer side of the spray chamber 34. A first channel 321 and a second channel 322 are both formed on the first plate 32, and both the first channel 321 and the second channel 322 penetrate the end face of the first plate 32 facing the stator core 20.

[0073] In this way, the side plate 31, the first plate 32, and the housing 10 cooperate to form the first cavity 33, eliminating the need for additional machining of the first cavity 33 and thus reducing machining steps. Simultaneously, the side plate 31 can form the cavity wall of the first cavity 33 along the axial direction of the stator core 20, effectively preventing the cooling medium from flowing out of the first cavity 33 or the first channel 321, thereby ensuring that the cooling medium in the first channel 321 can only flow towards the cooling flow channel 21. Furthermore, both the first channel 321 and the second channel 322 are located on the first plate 32, which improves the functional integration of the first plate 32.

[0074] Furthermore, both the first channel 321 and the second channel 322 penetrate one end face of the first plate 32, which facilitates the connection between the first channel 321 and the second channel 322 and the cooling channel 21. At the same time, this type of first channel 321 and second channel 322 is easy to process and can also ensure the accuracy of the fit between the first channel 321, the second channel 322 and the cooling channel 21.

[0075] For example, such as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, taking the second oil ring 302 as an example, the side plate 31 extends along the radial direction of the stator core 20 and forms a ring along the circumference of the stator core 20, making the side plate 31 a hollow circular ring structure. The first plate 32 is connected to the right side of the side plate 31 and extends along the axial direction of the stator core 20. The first plate 32 forms a ring along the circumference of the stator core 20. The first channel 321 and the second channel 322 are both formed on the first plate 32 and are arranged alternately in the circumference of the first plate 32. The first channel 321 and the second channel 322 both penetrate the right end face of the first plate 32. The first oil ring 301 and the second oil ring 302 are symmetrically arranged in the left and right directions.

[0076] According to some optional embodiments of the present invention, refer to Figure 7 and Figure 8 The first plate 32 has a plurality of blocks 323 that protrude outward along the radial direction of the first plate 32. That is, the first plate 32 may have two, three, four or more blocks 323. The plurality of blocks 323 are arranged at intervals along the circumference of the first plate 32. The adjacent blocks 323 cooperate to define a first channel 321. The first channel 321 is open on the outer side of the first plate 32 in the radial direction.

[0077] In this way, multiple stops 323 can define multiple first channels 321, eliminating the need to groove the first channel 321 on the first plate 32. This saves processing steps, improves processing efficiency, and avoids damage to the first plate 32 during the grooving process. Furthermore, the opening direction of the first channel 321 is reasonable, ensuring that the cooling medium can flow through the first cavity 33 to the first channel 321 when it flows downwards from the oil inlet 11 under gravity. Moreover, the reasonable opening direction of the first channel 321 reduces assembly difficulty. Even if there is a radial error between the oil ring 30 and the housing 10, the first channel 321 of this application is positioned closer to the inner wall of the housing 10 than the oil ring 30 in the prior art, effectively ensuring that the first channel 321 can communicate normally with the oil inlet 11.

[0078] For example, such as Figure 7 and Figure 8As shown, the radial outer surface of the first plate 32 is provided with a plurality of baffles 323. The plurality of baffles 323 are arranged at intervals in the circumferential direction of the first plate 32. Adjacent baffles 323 define a plurality of first channels 321. The first channels 321 are open to the side facing the housing 10, thereby ensuring that the cooling medium flows to the first channel 321 through the oil inlet 11 and the first cavity 33.

[0079] According to some embodiments of the present invention, with reference to Figure 7 and Figure 8 In the radial direction of the stator core 20, the distance between the first channel 321 and the central axis of the stator core 20 is greater than the distance between the second channel 322 and the central axis of the stator core 20. This ensures the rational arrangement of the first channel 321 and the second channel 322 on the oil ring 30, thus guaranteeing the rationality of the oil ring 30. Simultaneously, it avoids the first channel 321 and the second channel 322 being on the same circumference, which could affect the structural strength of the oil ring 30, thereby ensuring its service life. Furthermore, the first channel 321 and the second channel 322 are partially connected to the cooling channel 21, effectively reducing the machining difficulty of the stator core 20 and the oil ring 30, and facilitating the mating and installation of the oil ring 30 and the stator core 20.

[0080] According to some optional embodiments of the present invention, refer to Figure 7 and Figure 8 The baffle 323 has a guide slope 3231 formed on the outer radial surface of the first plate 32. The guide slope 3231 extends radially inward along the first plate 32 and inclined towards the first channel 321 in the circumferential direction of the first plate 32. This ensures that the cooling medium in the first cavity 33 flows to the first channel 321 along the guide slope 3231, thereby preventing the cooling medium from being retained on the baffle 323. At the same time, the guide slopes on the baffles 323 on both sides of the first channel 321 can collect the cooling medium, thus ensuring that the cooling medium flowing into the first cavity 33 can flow to the first channel 321.

[0081] For example, such as Figure 7 and Figure 8 As shown, a guide slope 3231 is formed on the radial outer surface of the baffle 323. On both sides of the first channel 321, the guide slope 3231 on each baffle 323 extends obliquely toward the first channel 321, thereby realizing the collection of cooling medium.

[0082] According to some optional embodiments of the present invention, refer to Figure 7 and Figure 9The first plate 32 is provided with a connecting hole 324. One end of the connecting hole 324 passes through the peripheral wall of the second channel 322, and the other end passes through the inner peripheral surface of the first plate 32 radially. Thus, the connecting hole 324 can connect the second channel 322 and the spray chamber 34, thereby ensuring that the cooling medium can flow to the spray chamber 34 through the second channel 322 and the connecting hole 324.

[0083] For example, such as Figure 7 and Figure 9 As shown, a connecting hole 324 is provided on the first plate 32, and the connecting hole 324 connects the second channel 322 and the spray chamber 34. There are multiple connecting holes 324, which are arranged at intervals along the circumference of the first plate 32, and each connecting hole 324 corresponds to a second channel 322. Taking the second oil ring 302 as an example, the second channel 322 is formed inside the stop 323 of the first plate 32. The right side of the second channel 322 penetrates the right side surface of the stop 323, and the connecting hole 324 penetrates the radial inner circumferential wall of the second channel 322 and also penetrates the first plate 32. The second channel 322 and the connecting hole 324 form an L-shaped flow path. The first oil ring 301 and the second oil ring 302 are arranged symmetrically in the left-right direction.

[0084] During the process of the cooling medium flowing along the second flow channel 212 to the spray chamber 34 of the second oil ring 302, the cooling medium flows from right to left along the second flow channel 212 to the second channel 322 of the second oil ring 302, and then the cooling medium flows through the second channel 322 to the connecting hole 324. After that, the cooling medium flows through the connecting hole 324 along the radial direction of the second oil ring 302 toward the spray chamber 34, thus completing the flow of the cooling medium from the second flow channel 212 to the spray chamber 34 of the second oil ring 302.

[0085] According to some embodiments of the present invention, with reference to Figure 10 and Figure 11 The second channel 322 is formed by a radial outward indentation of the inner circumferential surface of the first plate 32. This structure is simple, allowing the cooling medium to flow directly through the second channel 322 to the spray chamber 34, thus ensuring the flow rate of the cooling medium and preventing its accumulation in the cooling channel 21. Furthermore, compared to a built-in second channel 322, this structure improves the cooling effect of the windings near the end face of the stator core 10, effectively preventing high-temperature damage to the end face of the stator core 10.

[0086] Furthermore, such as Figure 10 and Figure 11 As shown, the second channel 322 is open on the inner side of the first plate 32 in the radial direction. Therefore, coolant can directly enter the second channel 322 and flow to the spray chamber 34, thus ensuring the flow rate of coolant in the spray chamber 34 and consequently ensuring the cooling effect on the winding.

[0087] According to some embodiments of the present invention, with reference to Figure 10 and Figure 11 The oil ring 30 also includes a second plate 35, which is connected to the side of the side plate 31 facing the stator core 20 and extends along the axial direction of the stator core 20. The second plate 35 extends in a ring shape along the circumference of the stator core 20. The second plate 35 is located on the radial inner side of the first plate 32. The side plate 31, the first plate 32 and the second plate 35 define the spray chamber 34.

[0088] In this way, the second plate 35 is positioned reasonably and will not affect the position of the first plate 32, thus ensuring the structural rationality of the oil ring 30. At the same time, the side plate 31, the first plate 32, and the second plate 35 cooperate with the stator core 20 to form a relatively closed spray chamber 34. When the cooling medium flows into the spray chamber 34, the cooling medium can immerse the stator core 20 and the ends of the winding 40 in the spray chamber 34, thereby enabling sufficient heat exchange between the stator core 20 and the winding 40.

[0089] For example, such as Figure 10 and Figure 11 As shown, taking the second oil ring 302 as an example, the second plate 35 is connected to the right side surface of the side plate 31. The second plate 35 extends along the axial direction of the stator core 20 and extends in a ring along the circumference of the stator core 20. The second plate 35 is located on the radial inner side of the first plate 32. The side plate 31, the first plate 32 and the second plate 35 define a spray chamber 34 that opens to the right. The first oil ring 301 and the second oil ring 302 are arranged symmetrically in the left and right directions.

[0090] According to some optional embodiments of the present invention, refer to Figure 10 and Figure 11 An oil outlet 311 is provided on the side plate 31, which extends through the side plate 31 along the axial direction of the oil ring 30 and connects the spray chamber 34 and the oil drain port 12 of the motor 100. Therefore, the oil outlet 311 is positioned appropriately, allowing the cooling medium to fully cool the end faces of the winding 40 and stator core 20 within the spray chamber 34 before flowing out of the spray chamber 34 through the oil outlet 311. This ensures both the heat exchange effect of the cooling medium on the winding 40 and stator core 20 and the flow rate of the cooling medium within the motor 100, thereby preventing thermal stress concentration in the motor 100 and effectively guaranteeing its service life.

[0091] For example, such as Figure 10 and Figure 11 As shown, the oil outlet 311 is provided on the side plate 31. The oil outlet 311 penetrates the side plate 31 in the left and right direction and connects the spray chamber 34 and the oil drain port 12 of the motor 100.

[0092] According to some optional embodiments of the present invention, refer to Figure 11 and Figure 12 The number of oil outlet holes 311 is multiple, that is, there can be two, three, four or more oil outlet holes 311, which are arranged at intervals on the side plate 31. Thus, the multiple oil outlet holes 311 can ensure the speed at which the cooling medium flows out of the spray chamber 34, thereby ensuring the circulation efficiency of the cooling medium in the motor 100, and thus ensuring the heat exchange effect of the motor 100.

[0093] According to some optional embodiments of the present invention, refer to Figure 11 and Figure 12 The axis of the stator core 20 is along the horizontal direction (e.g., Figure 9 Extending in the left-right direction as shown, multiple oil outlet holes 311 include: a first hole 3111 and a second hole 3112. The first hole 3111 is located above the second hole 3112, and the diameter of the first hole 3111 is larger than the diameter of the second hole 3112.

[0094] By placing the large-diameter first hole 3111 above the small-diameter second hole 3112, the cooling medium can be prevented from flowing directly out of the spray chamber 34 from the first hole 3111 before it has completely cooled the stator core 20 and winding 40, thus ensuring the heat exchange effect. At the same time, when the liquid level of the cooling medium at the bottom does not reach the height of the first hole 3111, the cooling medium can flow out of the spray chamber 34 from the second hole 3112 on the lower side, thus ensuring the circulation speed of the cooling medium in the spray chamber 34.

[0095] For example, such as Figure 11 and Figure 12 As shown, the axis of the stator core 20 extends in the left-right direction. There are two first holes 3111 and four second holes 3112. The four second holes 3112 are arranged at intervals in the circumferential direction of the side plate 31. The two first holes 3111 are arranged at intervals in the circumferential direction of the side plate 31, and the first holes 3111 are all located above the second holes 3112.

[0096] According to some embodiments of the present invention, with reference to Figure 2 and Figure 5 The motor 100 may further include a winding 40, which is wound on the stator core 20. A portion of the winding 40 extends beyond the stator core 20 along its axial direction to form the winding end of the winding 40. The winding end is located within the spray chamber 34 of the oil ring 30. Thus, the winding 40 can generate a rotating magnetic field using three-phase alternating current, thereby driving the rotor to rotate and enabling the normal operation of the motor 100. Simultaneously, the reasonable positioning of the winding end allows the cooling medium to directly cool the winding end, ensuring effective heat exchange with the winding 40.

[0097] For example, such as Figure 2 and Figure 5 As shown, the winding 40 has winding 40 ends at both the left and right ends. The left winding 40 end is located in the spray chamber 34 of the second oil ring 302, and the right winding 40 end is located in the spray chamber 34 of the first oil ring 301.

[0098] According to the powertrain of the second aspect of the present invention, referring to Figure 1 , Figure 2 , Figure 7 , Figure 10 and Figure 11 This includes the motor 100 according to the first aspect of the present invention.

[0099] According to the power assembly of the present invention, by providing the motor 100 of the first aspect of the present invention, a first flow channel 211 and a second flow channel 212 are provided on the stator core 20, and the cooling medium can fully exchange heat with both ends of the stator core 20 in the axial direction, thereby ensuring the heat exchange effect of the cooling medium on the stator core 20, and at the same time, effectively protecting the stator core 20, thereby improving the service life of the motor 100.

[0100] According to the vehicle of the third aspect of the present invention, with reference to Figure 1 , Figure 2 , Figure 7 , Figure 10 and Figure 11 This includes the electric motor 100 according to the first aspect of the invention or the powertrain according to the second aspect of the invention.

[0101] According to the vehicle of the present invention, by providing the motor 100 of the first aspect of the present invention or the powertrain of the second aspect of the present invention, a first flow channel 211 and a second flow channel 212 are provided on the stator core 20, so that the cooling medium can fully exchange heat with both ends of the stator core 20 in the axial direction, thereby ensuring the heat exchange effect of the cooling medium on the stator core 20, and at the same time, effectively protecting the stator core 20, thereby improving the service life of the motor 100.

[0102] The following will refer to Figures 1-12 The vehicle is described according to two specific embodiments of the present invention.

[0103] Example 1,

[0104] Reference Figures 1-9 The vehicle includes a powertrain, which includes an electric motor 100. The electric motor 100 includes a housing 10, a stator core 20, two oil rings 30, and windings 40.

[0105] The housing 10 is a hollow cylinder extending in the left-right direction. A first oil inlet 111 and a second oil inlet 112 are formed on the upper side of the housing 10. The first oil inlet 111 is located to the right of the second oil inlet 112.

[0106] The stator core 20 is located inside the housing 10. The stator core 20 is provided with multiple cooling channels 21. The cooling channels 21 extend in the left and right direction and include multiple first channels 211 and second channels 212. The cooling medium flows from right to left in the first channel 211 and from left to right in the second channel 212. The multiple first channels 211 and multiple second channels 212 are arranged alternately along the circumference of the stator core 20.

[0107] Both oil rings 30 are located inside the housing 10 and on the left and right sides of the stator core 20. The oil rings 30 include: a first oil ring 301 and a second oil ring 302. The first oil ring 301 is located on the right side of the stator core 20, and the second oil ring 302 is located on the left side of the stator core 20.

[0108] Taking the second oil ring 302 as an example, the oil ring 30 includes: a side plate 31 and a first plate 32. The side plate 31 extends radially along the stator core 20 and extends in a ring shape in the circumferential direction of the stator core 20. The first plate 32 is connected to the right side of the side plate 31. The first plate 32 extends to the right along the axial direction of the stator core 20 and extends in a ring shape in the circumferential direction of the stator core 20. The first oil ring 301 and the second oil ring 302 are symmetrically arranged in the left and right directions.

[0109] The first plate 32 has a plurality of blocks 323 protruding outward along the radial direction of the first plate 32. The plurality of blocks 323 are arranged at intervals along the circumference of the first plate 32. Adjacent blocks 323 cooperate to define a first channel 321, which penetrates the right end face of the first plate 32. A guide slope 3231 is formed on the outer radial surface of the blocks 323 of the first plate 32. The guide slope 3231 extends radially inward along the first plate 32 and inclined toward the first channel 321 in the circumference of the first plate 32. The first plate 32 and the side plate 31 form a first cavity 33 with the inner wall of the housing 10. The first channel 321 communicates with the oil inlet 11 through the first cavity 33. The radial inner side of the first plate 32 defines a spray chamber 34.

[0110] The second channel 322 is formed on the first plate 32. There are multiple first channels 321 and multiple second channels 322. The multiple first channels 321 and second channels 322 are arranged at intervals in the circumferential direction of the first plate 32. The distance between the first channel 321 and the central axis of the stator core 20 is greater than the distance between the second channel 322 and the central axis of the stator core 20.

[0111] The second channel 322 can be formed inside the stop block 323. The second channel 322 penetrates the right end face of the first plate 32 facing the stator core 20. The first plate 32 is provided with a connecting hole 324. One end of the connecting hole 324 penetrates the peripheral wall of the second channel 322, and the other end penetrates the inner peripheral surface of the first plate 32 radially. The connecting hole 324 enables the second channel 322 to communicate with the spray chamber 34. The second channel 322 can also be formed by a radial outward recess from the inner peripheral surface of the first plate 32.

[0112] The winding 40 is wound on the stator core 20, and a portion of the winding 40 extends beyond the stator core 20 along the axial direction of the stator core 20 to form the winding end of the winding 40. The winding end is located inside the spray chamber 34. An oil drain port 12 is provided on the lower side of the housing 10, and the oil drain port 12 communicates with the spray chamber 34.

[0113] When the motor 100 is running, it generates heat. At this time, the cooling medium flows from the second oil inlet 112 to the first chamber 33 on the left, then flows through the first chamber 33 to the first channel 321 of the second oil ring 302, then flows from the first channel 321 through the first flow channel 211 to the second channel 322 of the first oil ring 301, then flows from the connecting hole 324 to the spray chamber 34 to exchange heat with the end of the winding 40 on the right. Finally, the cooling medium flows out of the motor 100 from the oil drain port 12 on the right side of the housing 10. Meanwhile, the cooling medium flows from the first oil inlet 111 to the first chamber 33 on the right, and then flows through the first chamber 33 on the right to the first channel 321 of the first oil ring 301. Then the cooling medium flows from the first channel 321 through the second flow channel 212 to the second channel 322 of the second oil ring 302. Then the cooling medium flows from the connecting hole 324 to the spray chamber 34 to exchange heat with the end of the winding 40 on the left. Finally, the cooling medium flows out of the motor 100 from the oil drain port 12 on the left side of the housing 10. At this time, the heat exchange of the motor 100 is completed.

[0114] According to the vehicle of the present invention, by providing a powertrain according to the second aspect of the present invention, a motor 100 of the first aspect is provided on the powertrain, and a first flow channel 211 and a second flow channel 212 are provided on the stator core 20. The cooling medium can fully exchange heat with both ends of the stator core 20 in the axial direction, thereby ensuring the heat exchange effect of the cooling medium on the stator core 20. At the same time, the stator core 20 can be effectively protected, thereby improving the service life of the motor 100.

[0115] Example 2,

[0116] like Figures 10-12As shown, the structure of this embodiment is roughly the same as that of Embodiment 1, with the same components using the same reference numerals. The only difference is that the oil ring 30 in Embodiment 1 includes a side plate 31 and a first plate 32, while the oil ring 30 in this embodiment includes a side plate 31, a first plate 32, and a second plate 35.

[0117] Taking the second oil ring 302 as an example, the second plate 35 is connected to the right side of the side plate 31 facing the stator core 20 and extends along the axial direction of the stator core 20. The second plate 35 extends in a ring shape along the circumference of the stator core 20. The second plate 35 is located on the radial inner side of the first plate 32. The side plate 31, the first plate 32 and the second plate 35 define the spray cavity 34. The first oil ring 301 and the second oil ring 302 are arranged symmetrically in the left and right directions.

[0118] The side plate 31 is provided with an oil outlet 311, which extends through the side plate 31 in the left-right direction and is connected between the spray chamber 34 and the oil drain port 12 of the motor 100.

[0119] There are multiple oil outlet holes 311, which are arranged at intervals on the side plate 31. The multiple oil outlet holes 311 include: a first hole 3111 and a second hole 3112. The first hole 3111 is located above the second hole 3112, and the diameter of the first hole 3111 is larger than the diameter of the second hole 3112. There are two first holes 3111, which are arranged at intervals along the circumference of the side plate 31. There are four second holes 3112, which are also arranged at intervals along the circumference of the side plate 31.

[0120] In this embodiment, compared to the motor 100 in Embodiment 1, the end of the winding 40 can be fully immersed in the spray chamber 34, thereby ensuring the heat exchange effect of the cooling medium on the winding 40.

[0121] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0122] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0123] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0124] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 present invention. In this specification, the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0125] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations 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. An electric motor (100), characterized in that, include: The housing (10) has an oil inlet (11) formed thereon; A stator core (20) is disposed inside the housing (10). The stator core (20) is provided with a plurality of cooling channels (21). The plurality of cooling channels (21) extend along the axial direction of the stator core (20) and are arranged at intervals in the circumferential direction of the stator core (20). A portion of the plurality of cooling channels (21) is formed as a first channel (211) and another portion is formed as a second channel (212). Two oil rings (30), namely a first oil ring (301) and a second oil ring (302), are respectively located on both sides of the stator core (20) in the axial direction. Each of the two oil rings (30) has a first channel (321) and a second channel (322). The first channel (321) of each of the two oil rings (30) is connected to the oil inlet (11). The first flow channel (211) is connected between the first channel (321) of the second oil ring (302) and the second channel (322) of the first oil ring (301), and the second flow channel (212) is connected between the first channel (321) of the first oil ring (301) and the second channel (322) of the second oil ring (302).

2. The motor (100) according to claim 1, characterized in that, The number of oil inlets (11) is two, namely a first oil inlet (111) and a second oil inlet (112). The first oil inlet (111) is connected to the first channel (321) of the first oil ring (301), and the second oil inlet (112) is connected to the second channel (322) of the second oil ring (302).

3. The motor (100) according to claim 1, characterized in that, The plurality of first flow channels (211) and the plurality of second flow channels (212) are located at the same circumferential position of the stator core (20), and / or the plurality of first flow channels (211) and the plurality of second flow channels (212) are arranged alternately along the circumference of the stator core (20).

4. The motor (100) according to claim 1, characterized in that, The first oil ring (301) has multiple first channels (321) and the second oil ring (302) has multiple second channels (322), which correspond one-to-one with and are connected to multiple second flow channels (212); The second oil ring (302) has multiple first channels (321) and the first oil ring (301) has multiple second channels (322), which correspond one-to-one with and are connected to multiple first channels (211).

5. The motor (100) according to claim 1, characterized in that, The inner side of the oil ring (30) defines a spray chamber (34), which is connected to the second channel (322) in the same oil ring (30).

6. The motor (100) according to claim 5, characterized in that, The housing (10) and the oil ring (30) cooperate to define a first cavity (33), which is located on the radial outer side of the spray chamber (34). A plurality of first channels (321) are connected to the oil inlet (11) through the first cavity (33).

7. The motor (100) according to claim 6, characterized in that, The oil ring (30) includes: Side plate (31), the side plate (31) is located on one side of the axial direction of the stator core (20), the side plate (31) extends radially along the stator core (20), and extends in a ring shape in the circumferential direction of the stator core (20); A first plate (32) is connected to the side plate (31) facing the stator core (20). The first plate (32) extends axially along the stator core (20) and extends circumferentially along the stator core (20) in a ring shape. The spray chamber (34) is formed on the radial inner side of the first plate (32), and the first cavity (33) is formed on the radial outer side of the spray chamber (34).

8. The motor (100) according to claim 7, characterized in that, The first channel (321) and the second channel (322) are both formed on the first plate (32), and the first channel (321) and the second channel (322) both penetrate the end face of the first plate (32) facing the stator core (20).

9. The motor (100) according to claim 7, characterized in that, The first plate (32) has a plurality of blocks (323) that protrude radially outward along the first plate (32). The plurality of blocks (323) are arranged at intervals along the circumference of the first plate (32). The adjacent blocks (323) cooperate to define the first channel (321), which is open on the radial side of the first plate (32).

10. The motor (100) according to claim 9, characterized in that, In the radial direction of the stator core (20), the distance between the first channel (321) and the central axis of the stator core (20) is greater than the distance between the second channel (322) and the central axis of the stator core (20).

11. The motor (100) according to claim 9, characterized in that, The stop (323) has a guide slope (3231) formed on the outer surface of the first plate (32) in the radial direction. The guide slope (3231) extends radially inward along the first plate (32) and obliquely toward the first channel (321) in the circumferential direction of the first plate (32).

12. The motor (100) according to claim 7, characterized in that, The first plate (32) is provided with a connecting hole (324), one end of which passes through the peripheral wall of the second channel (322), and the other end passes through the inner peripheral surface of the first plate (32) along the radial direction.

13. The motor (100) according to claim 7, characterized in that, The second channel (322) is formed by a radial outward recess from the inner circumferential surface of the first plate (32). And / or, the second channel (322) is open on the radially inner side of the first plate (32).

14. The motor (100) according to claim 7, characterized in that, The oil ring (30) further includes a second plate (35), which is connected to the side of the side plate (31) facing the stator core (20) and extends along the axial direction of the stator core (20). The second plate (35) extends in a ring shape along the circumference of the stator core (20). The second plate (35) is disposed radially inside the first plate (32), and the side plate (31), the first plate (32) and the second plate (35) define the spray chamber (34).

15. The motor (100) according to claim 14, characterized in that, The side plate (31) is provided with an oil outlet (311), which is connected between the spray chamber (34) and the oil drain port (12) of the motor (100).

16. The motor (100) according to claim 15, characterized in that, The oil outlet (311) extends through the side plate (31) along the axial direction of the oil ring (30).

17. The motor (100) according to claim 15, characterized in that, The number of oil outlet holes (311) is multiple, and the multiple oil outlet holes (311) are arranged at intervals on the side plate (31).

18. The motor (100) according to claim 17, characterized in that, The axis of the stator core (20) extends horizontally, and the plurality of oil outlet holes (311) include: a first hole (3111) and a second hole (3112), wherein the diameter of the first hole (3111) is larger than the diameter of the second hole (3112), the first hole (3111) and the second hole (3112) are arranged at intervals in the vertical direction, and the first hole (3111) is located above the second hole (3112) in the vertical direction.

19. The motor (100) according to claim 1, characterized in that, Also includes: A winding (40) is wound on the stator core (20), a portion of which extends beyond the stator core (20) along the axial direction to form the winding (40) end, the winding (40) end being located within the spray chamber (34) of the oil ring (30).

20. A powertrain, characterized in that, The motor (100) includes any one of claims 1-19.

21. A vehicle, characterized in that, Includes the motor (100) according to any one of claims 1-19 or the powertrain according to claim 20.

Images