Motor and vehicle having the same

Abstract

The present application provides a motor, which includes a housing. A stator assembly is disposed inside the housing, and the stator assembly includes a stator core. A first cooling groove and a second cooling groove that communicate with each other are provided on the inner surface of the housing. The first cooling groove is circumferentially arranged around the central axis of the stator core. The second cooling groove extends along the direction of the central axis of the stator core, and both ends of the second cooling groove extend to both ends of the stator core respectively. A stator oil inlet is provided on the housing, and the stator oil inlet is used to guide cooling oil into the first cooling groove. An end portion of the stator core has an end winding formed by winding stator coils. The second cooling groove extends to the end portion of the stator core. According to the motor of the present application, the cooling effect is good and the performance of the motor is not affected.

Description

Technical Field

[0001] This application belongs to the technical field of motors, and particularly relates to a motor and an automobile having the same. Background Art

[0002] At present, the main drive motor is the power output unit of new energy vehicles, similar to the engine of traditional fuel vehicles. It is the most core component of new energy vehicles. Especially for pure electric vehicles, the main drive motor is the only power source, and its performance, weight, and volume directly affect the operation of the vehicle, the design layout of the frame and chassis, etc.

[0003] However, at present, the water cooling effect of the main drive motor is limited, and using heat-conducting materials to improve the heat transfer efficiency is generally restricted by factors such as material cost or complex processes, and is not suitable for mass production. Therefore, at this stage, the most effective method is to use oil cooling technology. And existing oil cooling solutions mostly have complex oil circuit structures, increasing the processing cost, or the oil circuit structures are unreasonable, with limited cooling effects, or the oil circuit occupies the space of other parts. For example, in the existing technology, the oil circuit is opened in the stator yoke, which not only affects the magnetic circuit but also increases the volume of the stator, making the oil cooling not fully play its role.

[0004] Therefore, how to provide a motor with a simple cooling oil circuit structure, which does not affect the performance of the motor and can comprehensively cool has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to provide a motor and an automobile having the same, with a simple cooling oil circuit structure, which does not affect the performance of the motor and can comprehensively cool.

[0006] To solve the above problems, this application provides a motor, including a housing. A stator assembly is arranged inside the housing, and the stator assembly includes a stator core. A first cooling groove and a second cooling groove that are communicated with each other are arranged on the inner surface of the housing; the first cooling groove is circumferentially arranged around the central axis of the stator core; the second cooling groove extends along the axial direction of the stator core. A stator oil inlet is arranged on the housing, and the stator oil inlet is used to guide cooling oil into the first cooling groove; the end of the stator core has an end winding wound by a stator coil; the second cooling groove extends to the end of the stator core.

[0007] Preferably, the motor further includes a rotor core and a rotating shaft both arranged inside the housing; the rotor core is sleeved outside the rotating shaft, the inside of the rotating shaft is a hollow structure, and a rotor oil inlet and a rotor oil outlet are opened on the rotating shaft. The rotor oil inlet is used to guide cooling oil into the hollow structure, and the rotor oil outlet is used to guide the cooling oil in the hollow structure to flow out;

[0008] And / or, the central axis of the stator core is parallel to the horizontal plane; and / or, the outer peripheral wall of the stator core fits against the inner surface of the housing; and / or, the first cooling groove is an annular groove circumferentially arranged around the central axis of the stator core.

[0009] Preferably, the inner surface of the housing is further provided with a plurality of ribs arranged at intervals along the circumference of the stator core, and each rib extends in the axial direction of the stator core, and a second cooling groove is formed between two adjacent ribs.

[0010] Preferably, the stator assembly is sleeved on the outer peripheral side of the rotor core, and a rotor extrusion part is arranged at the end of the rotor core; the rotor extrusion part is located on the inner peripheral side of the end winding; an oil inlet of the extrusion part is arranged on the rotor extrusion part, and the oil inlet of the extrusion part is communicated with the rotor oil outlet; an oil passage of the extrusion part is arranged in the rotor extrusion part; and an oil outlet of the extrusion part is arranged on the surface of the rotor extrusion part close to the end winding; the oil outlet of the extrusion part corresponds to the position of the end winding; the oil inlet of the extrusion part, the oil passage of the extrusion part and the oil outlet of the extrusion part are communicated in sequence.

[0011] Preferably, the end winding includes a first end winding and a second end winding; the first end winding is arranged at the first end of the stator core, and the second end winding is arranged at the second end of the stator core.

[0012] Preferably, the rotor extrusion part includes a first rotor extrusion part; the first rotor extrusion part is arranged at the first end of the rotor, and the first rotor extrusion part corresponds to the position of the first end winding; a first oil inlet of the extrusion part is arranged on the first rotor extrusion part; the first oil inlet of the extrusion part is communicated with the rotor oil outlet; a first oil passage of the extrusion part is arranged in the first rotor extrusion part, and a first oil outlet of the extrusion part is arranged on the surface of the first rotor extrusion part close to the first end winding; the first oil inlet of the extrusion part, the first oil passage of the extrusion part and the first oil outlet of the extrusion part are communicated in sequence;

[0013] And / or, the rotor extrusion part includes a second rotor extrusion part; the second rotor extrusion part is arranged at the second end of the rotor, and the second rotor extrusion part corresponds to the position of the second end winding in the circumferential direction; a second oil inlet of the extrusion part is arranged on the second rotor extrusion part, and the second oil inlet of the extrusion part is communicated with the rotor oil outlet; a second oil passage of the extrusion part is arranged in the second rotor extrusion part, and a second oil outlet of the extrusion part is arranged on the surface of the second rotor extrusion part close to the second end winding; the second oil inlet of the extrusion part, the second oil passage of the extrusion part and the second oil outlet of the extrusion part are communicated in sequence.

[0014] Preferably, the rotor oil outlet includes a first rotor oil outlet; the first rotor oil outlet is communicated to the first oil inlet of the extrusion part;

[0015] And / or, the rotor oil outlet includes a second rotor oil outlet; the second rotor oil outlet is communicated to the second oil inlet of the extrusion part.

[0016] Preferably, the rotor extrusion part is an annular structure arranged circumferentially around the rotating shaft, and the inner peripheral wall of the rotor extrusion part fits the outer surface of the rotating shaft; the oil inlet of the extrusion part is opened on the inner peripheral wall of the rotor extrusion part and corresponds to the rotor oil outlet in both the axial and circumferential directions; the oil passage of the extrusion part is arranged inside the rotor extrusion part, and the oil outlet of the extrusion part is arranged on the outer peripheral wall of the rotor extrusion part.

[0017] Preferably, the rotor extrusion part includes a coaxial first annular part and a second annular part, and the inner diameters of the cross-sections of the first annular part and the second annular part are equal; the second annular part is arranged on the first end of the first annular part, and the outer peripheral wall of the second annular part is located on the inner circumferential side of the outer peripheral wall of the first annular part; the inner peripheral walls of the first annular part and the second annular part both fit the rotating shaft; the oil inlet of the extrusion part is arranged on the inner peripheral wall of the first annular part; the oil outlet of the extrusion part is arranged on the outer peripheral wall of the second annular part; the oil passage of the extrusion part includes a first oil passage and a second oil passage that are connected to each other, the first oil passage is arranged inside the first annular part, and the second oil passage is arranged inside the second annular part; the oil inlet of the extrusion part connects the rotor oil outlet and the first oil passage; the oil outlet of the extrusion part is connected to the second oil passage.

[0018] Preferably, a receiving groove is arranged at the connection position between the oil inlet of the extrusion part and the oil passage of the extrusion part; the receiving groove connects the oil inlet of the extrusion part and the oil passage of the extrusion part;

[0019] And / or, the oil outlet of the extrusion part is provided in multiple numbers, and the multiple oil outlets of the extrusion part are arranged circumferentially around the rotating shaft.

[0020] Preferably, the motor further includes a separator, the separator is arranged at one end of the stator core and is located on the outer circumferential side of the end winding; a sealing cavity is formed between the separator, the inner surface of the housing and the end face of the stator core; the second cooling groove is connected to the sealing cavity; through holes are arranged on the separator for guiding the cooling oil in the sealing cavity to flow out, and the through holes correspond to the position of the end winding.

[0021] Preferably, the separator includes an annular separation part and an axially extending part; the annular separation part is arranged circumferentially around the rotating shaft; the axially extending part is arranged circumferentially around the rotating shaft; the outer circumferential side of the annular separation part is connected to the inner surface of the housing, and the inner circumferential side is connected to the first end of the axially extending part; the axially extending part extends towards the stator core; the second end of the axially extending part is connected to the end of the stator core; the through holes are arranged on the axially extending part and correspond to the position of the end winding;

[0022] And / or, the through holes are provided in multiple numbers, and the multiple through holes are arranged circumferentially around the rotating shaft.

[0023] Preferably, a radial stop surface is arranged on the inner surface of the housing; the end face of the annular separation part away from the axially extending part is press-connected to the stop surface.

[0024] Preferably, an annular groove is formed in the stop surface and is arranged circumferentially around the rotating shaft, and an annular sealing ring is embedded in the annular groove.

[0025] Preferably, the separator includes a first separator; the through hole includes a first through hole; the first separator is arranged at the first end of the stator core, and a first sealing cavity is formed between the first separator, the inner surface of the housing and the first end face of the stator core; the first end of the second cooling groove communicates with the first sealing cavity; the first sealing cavity corresponds to the first end winding in the circumferential direction; the first through hole is arranged on the first separator, and the first through hole is used to guide the cooling oil in the first sealing cavity to flow out; and the first through hole corresponds to the first end winding in the circumferential direction;

[0026] And / or, the separator includes a second separator; the through hole includes a second through hole; the second separator is arranged at the second end of the stator core, and a second sealing cavity is formed between the second separator, the inner surface of the housing and the second end face of the stator core; the second end of the second cooling groove communicates with the second sealing cavity; the second sealing cavity corresponds to the second end winding in the circumferential direction; the second through hole is arranged on the second separator, and the second through hole is used to guide the cooling oil in the second sealing cavity to flow out; and the second through hole corresponds to the second end winding in the circumferential direction.

[0027] Preferably, the first separator includes a first annular separation portion and a first axially extending portion; the first annular separation portion is arranged circumferentially around the rotating shaft; the first axially extending portion is arranged circumferentially around the rotating shaft; the first end of the first axially extending portion is connected to the inner circumferential side of the first annular separation portion, and the first axially extending portion extends in the direction close to the stator core; the outer circumferential side of the first annular separation portion is connected to the inner surface of the housing; the second end of the first axially extending portion is connected to the first end face of the stator core.

[0028] Preferably, the second separator includes a second annular separation portion and a second axially extending portion; the second annular separation portion is arranged circumferentially around the rotating shaft; the second axially extending portion is arranged circumferentially around the rotating shaft; the second end of the second axially extending portion is connected to the inner circumferential side of the second annular separation portion, and the second axially extending portion extends in the direction close to the stator core; the outer circumferential side of the second annular separation portion is connected to the inner surface of the housing; the second end of the second axially extending portion is connected to the second end face of the stator core.

[0029] Preferably, the stop surface includes a first stop surface; the end face of the first annular separation portion far from the first axially extending portion is in press contact with the first stop surface.

[0030] Preferably, the stop surface includes a second stop surface; the end face of the second annular separation portion far from the second axially extending portion is in press contact with the second stop surface.

[0031] Preferably, the housing includes a casing, a first end cover, and a second end cover. The first end cover is installed at the first end of the casing, and the second end cover is disposed at the second end of the casing.

[0032] Preferably, an axially extending second pressing member is provided on the second end cover; a first end of the second pressing member is connected to the inner surface of the second end cover; when the motor further includes a second separating member, and the second separating member includes a second annular separating portion and a second axially extending portion, a second end of the second pressing member is press-connected to an end surface of the annular separating portion away from the second axially extending portion.

[0033] Preferably, the motor further includes a separating portion and a first bearing. The first bearing is disposed at the first end of the rotating shaft, and the first bearing is sleeved outside the rotating shaft. The separating portion is disposed inside the housing, and the separating portion is an annular structure circumferentially arranged around the rotating shaft; an outer peripheral side of the separating portion is connected to the inner surface of the casing, and an inner peripheral side of the separating portion is connected to an outer surface of the first bearing; a first accommodating cavity is formed between the first bearing, the separating portion, and the first end cover; an oil inlet is provided on the separating portion or the end cover, and the oil inlet is used to guide cooling oil into the first accommodating cavity; when the rotating shaft is provided with a rotor oil inlet, the rotor oil inlet communicates with the first accommodating cavity; a stator oil inlet communicates with the first accommodating cavity.

[0034] Preferably, an axially extending first pressing member is provided on an outer peripheral edge of the separating portion; a first end of the first pressing member is connected to an outer peripheral wall of the separating portion; when the motor further includes a first separating member, and the first separating member includes a first annular separating portion and a first axially extending portion, a second end of the first pressing member is press-connected to an end surface of the first annular separating portion away from the first axially extending portion.

[0035] Preferably, the first pressing member is an annular member circumferentially arranged around the rotating shaft;

[0036] And / or, the first stop surface is an annular surface circumferentially arranged around the rotating shaft.

[0037] Preferably, an oil storage area is provided on the first end cover. The oil storage area is formed by being recessed outward from the inner surface of the first end cover, and the oil storage area corresponds to the position of the first bearing axially; a second accommodating cavity is formed between the oil storage area and the bearing, and the second accommodating cavity communicates with the first accommodating cavity.

[0038] Preferably, the first accommodating cavity communicates with the second accommodating cavity through an oil guiding hole.

[0039] Preferably, the rotor oil inlet is located in the second accommodating cavity.

[0040] Preferably, the motor further includes an oil tank, and the oil tank communicates with the oil inlet.

[0041] Preferably, the motor further includes an oil return channel, and the oil return channel communicates the lowest part inside the housing with the oil tank; the oil return channel is used to guide the cooling oil at the bottom of the housing to flow back to the oil tank.

[0042] Preferably, an axially extending oil inlet passage is provided on the housing, and the stator oil inlet is communicated with the first cooling tank through the oil inlet passage.

[0043] Preferably, a rib extending axially is provided on the outer peripheral side of the housing; an axially extending oil inlet passage is provided inside the rib; the first end of the oil inlet passage extends to the first end of the housing, and the second end of the oil inlet passage extends to the second end of the housing; the first end of the oil inlet passage is the end where the stator oil inlet is located.

[0044] Preferably, an oil pump and a heat exchanger are provided on the outer surface of the first end cover; an oil pump inlet and an oil pump outlet are provided on the oil pump; the oil pump inlet is communicated with the fuel tank; the oil pump outlet is communicated with the heat exchanger oil inlet; the heat exchanger oil outlet is communicated with the total oil inlet.

[0045] Preferably, the interior of the housing is sequentially divided into a first chamber, a second chamber, and a third chamber from the first end cover to the second end cover; the bottom of the housing forms a fuel tank; the oil return passage is provided at the bottom of the housing and communicates the bottom of the third chamber with the first chamber.

[0046] Preferably, the motor further includes a first connecting pipe, and the first connecting pipe communicates the outlet of the oil pump with the heat exchanger oil inlet;

[0047] And / or, the motor further includes a second connecting pipe, and the second connecting pipe communicates the heat exchanger oil outlet with the total oil inlet.

[0048] Preferably, the second connecting pipe is provided inside the housing.

[0049] Preferably, the motor further includes a second bearing, and the second bearing is provided at the second end of the rotating shaft and sleeved outside the rotating shaft.

[0050] Preferably, the second end of the rotating shaft extends out of the second end cover, and a shaft seal is sleeved on the rotating shaft. The inner peripheral side of the shaft seal is attached to the outer surface of the rotating shaft, and the outer peripheral side of the shaft seal is attached to the second end cover; a dynamic sealing structure is formed between the shaft seal, the rotating shaft, and the second end cover.

[0051] Preferably, the rotor oil outlet further includes a third rotor oil outlet, and the third rotor oil outlet is axially located between the second bearing and the shaft seal.

[0052] According to another aspect of the present application, a vehicle is provided, including a motor, and the motor is the above-mentioned motor.

[0053] For the motor provided by the present application and the vehicle having the same, the second cooling tank and the first cooling tank are used to guide the cooling oil to flow to the surface of the stator core and the surface of the end winding package. The cooling oil circuit structure is simple, and the second cooling tank and the first cooling tank are opened on the inner surface of the housing, which does not affect the performance of the motor. Description of the Drawings

[0054] Figure 1 Structural schematic diagram of the motor housing according to an embodiment of the present application;

[0055] Figure 2 Cross-sectional view of the motor housing according to an embodiment of the present application;

[0056] Figure 3 Cross-sectional view of the motor according to an embodiment of the present application;

[0057] Figure 4 Structural schematic diagram of the rotor extrusion part of the motor according to an embodiment of the present application;

[0058] Figure 5 Structural schematic diagram of the rotor extrusion part according to an embodiment of the present application;

[0059] Figure 6 Cross-sectional view of the rotor extrusion part and the rotor assembly according to an embodiment of the present application;

[0060] Figure 7 Cross-sectional view of the housing of the motor according to an embodiment of the present application;

[0061] Figure 8 Cross-sectional view of the separator according to an embodiment of the present application;

[0062] Figure 9 Structural schematic diagram of the separator according to an embodiment of the present application;

[0063] Figure 10 Structural schematic diagram of the first accommodation cavity according to an embodiment of the present application;

[0064] Figure 11 Structural schematic diagram of the motor according to an embodiment of the present application;

[0065] Figure 12 Cross-sectional view of the motor according to an embodiment of the present application.

[0066] The reference numerals are shown as:

[0067] 1. Housing; 11. First cooling tank; 12. Second cooling tank; 13. Rib; 14. Machine housing; 15. First end cover; 151. Oil storage area; 152. Oil guiding hole; 16. Second end cover; 17. Oil inlet passage; 171. Stator oil inlet; 18. Oil return passage; 21. Stator core; 22. End winding; 31. Rotor core; 32. Rotating shaft; 321. Rotor oil outlet; Rotor oil inlet; 4. Rotor extrusion part; 41. Extrusion part oil inlet; 42. Extrusion part oil passage; 43. Extrusion part oil outlet; 5. Partition; 51. Annular partition part; 52. Axial extension part; 53. Through hole; 61. Stopping surface; 62. Annular sealing ring; 71. First bearing; 72. Second bearing; 73. Partition part; 731. Total oil inlet; 8. Oil pump; 9. Heat exchanger; 91. First connecting pipe; 92. First connecting pipe; 93. Oil seal. Detailed implementation manners

[0068] With reference to Figure 3-7 As shown, according to an embodiment of the present application, a motor includes a housing 1, a stator assembly is arranged inside the housing 1, the stator assembly includes a stator core 21, and a first cooling tank 11 and a second cooling tank 12 which are communicated with each other are arranged on the inner surface of the housing 1; the first cooling tank 11 is circumferentially arranged around the central axis of the stator core 21; the second cooling tank 12 extends axially along the stator core 21, and a stator oil inlet 171 is arranged on the housing 1, and the stator oil inlet 171 is used for guiding cooling oil into the first cooling tank 11; an end of the stator core 21 has an end winding 22 wound by a stator coil; the second cooling tank 12 extends to the end of the stator core 21, and the second cooling tank 12 and the first cooling tank 11 are used to guide the cooling oil to flow to the surface of the stator core 21 and the surface of the end winding 22, and the cooling effect is good, and the second cooling tank 12 and the first cooling tank 11 are opened on the inner surface of the housing 1, which does not affect the performance of the motor.

[0069] Furthermore, the motor further includes a rotor core 31 and a rotating shaft 32 which are both arranged inside the housing 1; the rotor core 31 is sleeved outside the rotating shaft 32, the inside of the rotating shaft 32 is a hollow structure, a rotor oil inlet and a rotor oil outlet 321 are opened on the rotating shaft 32, the rotor oil inlet is used for guiding cooling oil into the hollow structure, and the rotor oil outlet 321 is used for guiding the cooling oil in the hollow structure to flow out;

[0070] And / or, the central axis of the stator core 21 is parallel to the horizontal plane; and / or, the outer peripheral wall of the stator core 21 is attached to the inner surface of the housing 1; and / or, the first cooling tank is an annular groove circumferentially arranged around the central axis of the stator core 21, and the oil path of the rotor hollow structure can cool the magnet and take away the heat generated by the magnet. The rotor oil outlet 321 can guide the cooling oil in the hollow structure to flow out, so that the cooling oil directly contacts the rotating shaft 32, and the cooling effect on the rotating shaft is good.

[0071] Furthermore, a plurality of ribs are arranged on the inner surface of the housing 1 at intervals in the circumferential direction of the stator core 21, each rib extending in the axial direction of the stator core 21, and a second cooling groove 12 is formed between two adjacent ribs 13.

[0072] With reference to Figure 3 and Figure 4 As shown, the present application also discloses some embodiments. The stator assembly is sleeved on the outer peripheral side of the rotor core 31, and a rotor extrusion part 4 is arranged at the end of the rotor core; the rotor extrusion part 4 is located on the inner peripheral side of the end winding 22; an oil inlet 41 of the extrusion part is arranged on the rotor extrusion part 4, and the oil inlet 41 of the extrusion part is communicated with the rotor oil outlet 321; an oil passage 42 of the extrusion part is arranged in the rotor extrusion part 4; and an oil outlet 43 of the extrusion part is arranged on the surface of the rotor extrusion part 4 close to the end winding 22; the oil outlet 43 of the extrusion part corresponds to the position of the end winding 22; the oil inlet 41 of the extrusion part, the oil passage 42 of the extrusion part and the oil outlet 43 of the extrusion part are communicated in sequence. During the operation of the motor, the cooling oil is thrown out from the rotor oil outlet 321 on the surface of the rotating shaft 32, enters the oil inlet 41 of the extrusion part, then enters the oil passage 42 of the extrusion part, and then flows out through the oil outlet 43 of the extrusion part and drips onto the inner peripheral side of the end winding 22, not only cooling the rotor extrusion part 4, but also cooling the inner peripheral side of the end winding 22.

[0073] Furthermore, the end winding 22 includes a first end winding and a second end winding; the first end winding is arranged at the first end of the stator core 21, and the second end winding is arranged at the second end of the stator core 21.

[0074] Furthermore, the rotor extrusion part 4 includes a first rotor extrusion part; the first rotor extrusion part is arranged at the first end of the rotor, and the first rotor extrusion part corresponds to the position of the first end winding; a first oil inlet of the extrusion part is arranged on the first rotor extrusion part; the first oil inlet of the extrusion part is communicated with the rotor oil outlet 321; a first oil passage of the extrusion part is arranged in the first rotor extrusion part, and a first oil outlet of the extrusion part is arranged on the surface of the first rotor extrusion part close to the first end winding; the first oil inlet of the extrusion part, the first oil passage of the extrusion part and the first oil outlet of the extrusion part are communicated in sequence;

[0075] And / or, the rotor extrusion part 4 includes a second rotor extrusion part; the second rotor extrusion part is arranged at the second end of the rotor, and the second rotor extrusion part corresponds to the position of the second end winding in the circumferential direction; a second extrusion part oil inlet is arranged on the second rotor extrusion part, and the second extrusion part oil inlet is communicated with the rotor oil outlet 321; a second extrusion part oil passage is arranged in the second rotor extrusion part, and a second extrusion part oil outlet is arranged on the surface of the second rotor extrusion part close to the second end winding; the second extrusion part oil inlet, the second extrusion part oil passage and the second extrusion part oil outlet are communicated in sequence, so that the inner surfaces of the two end windings can be cooled, and the cooling effect is good.

[0076] Further, the rotor oil outlet 321 includes a first rotor oil outlet; the first rotor oil outlet is communicated with the first extrusion part oil inlet;

[0077] And / or, the rotor oil outlet 321 includes a second rotor oil outlet; the second rotor oil outlet is communicated with the second extrusion part oil inlet.

[0078] Further, the rotor extrusion part 4 is an annular structure arranged circumferentially around the rotating shaft 32, and the inner peripheral wall of the rotor extrusion part 4 is attached to the outer surface of the rotating shaft 32; the extrusion part oil inlet 41 is opened on the inner peripheral wall of the rotor extrusion part 4 and corresponds to the rotor oil outlet 321 in both the axial and circumferential directions; the extrusion part oil passage 42 is arranged inside the rotor extrusion part 4, and the extrusion part oil outlet 43 is arranged on the outer peripheral wall of the rotor extrusion part 4.

[0079] Combined with Figure 4-6 As shown, the present application also discloses some embodiments. The rotor extrusion part 4 includes a coaxial first annular part and a second annular part, and the inner diameters of the cross-sections of the first annular part and the second annular part are equal; the second annular part is arranged on the first end of the first annular part, and the outer peripheral wall of the second annular part is located on the inner circumferential side of the outer peripheral wall of the first annular part; the inner peripheral walls of the first annular part and the second annular part are both attached to the rotating shaft 32; the extrusion part oil inlet 41 is arranged on the inner peripheral wall of the first annular part; the extrusion part oil outlet 43 is arranged on the outer peripheral wall of the second annular part; the extrusion part oil passage 42 includes a first oil passage and a second oil passage that are communicated with each other, the first oil passage is arranged in the first annular part, and the second oil passage is arranged in the second annular part; the extrusion part oil inlet 41 communicates the rotor oil outlet 321 with the first oil passage; the extrusion part oil outlet 43 is communicated with the second oil passage.

[0080] Further, a receiving groove is arranged at the connection position between the extrusion part oil inlet 41 and the extrusion part oil passage 42; the receiving groove communicates the extrusion part oil inlet 41 with the extrusion part oil passage 42;

[0081] And / or, the extrusion part oil outlet 43 is provided with a plurality of them, and the plurality of extrusion part oil outlets 43 are arranged circumferentially around the rotating shaft 32, so that the inner surface of the end winding 22 can be effectively cooled.

[0082] Referring to Figures 3 to 8 As shown, the present application also discloses some embodiments. The motor further includes a separator 5. The separator 5 is disposed at one end of the stator core 21, and the separator 5 is located on the outer peripheral side of the end winding 22. A sealing cavity is formed between the separator 5, the inner surface of the housing 1, and the end face of the stator core 21. The second cooling groove 12 communicates with the sealing cavity. The separator 5 is provided with through holes 53 for guiding the cooling oil in the sealing cavity to flow out, and the through holes 53 correspond to the positions of the end windings 22.

[0083] Referring to Figures 8-9 As shown, the present application also discloses some embodiments. The separator 5 includes an annular separator portion 51 and an axially extending portion 52. The annular separator portion 51 is circumferentially disposed around the rotating shaft 32. The axially extending portion 52 is circumferentially disposed around the rotating shaft 32. The outer peripheral side of the annular separator portion 51 is connected to the inner surface of the housing 1, and the inner peripheral side is connected to the first end of the axially extending portion 52. The axially extending portion 52 extends towards the stator core 21. The second end of the axially extending portion 52 is connected to the end of the stator core. The through holes 53 are disposed on the axially extending portion 52 and correspond to the positions of the end windings 22.

[0084] And / or, the through holes 53 are provided in plurality, and the plurality of through holes 53 are circumferentially disposed around the rotating shaft 32. After the cooling oil enters the stator oil inlet 171, a part of the cooling oil flows along the first cooling groove 11 to cool the stator core, and a part of the cooling oil flows radially on both sides along the second cooling groove and finally enters the sealing cavity formed between the separator 5, the inner surface of the housing 1, and the end face of the stator core 21, and is sprayed onto the end windings 22 through the ring through holes 53 to cool the end windings 22.

[0085] Furthermore, a radial stop surface 61 is provided on the inner surface of the housing 1. The end face of the annular separator portion 51 away from the axially extending portion 52 is press-fitted with the stop surface 61.

[0086] Furthermore, an annular groove circumferentially disposed around the rotating shaft 32 is formed on the stop surface 61, and an annular sealing ring 62 is embedded in the annular groove.

[0087] Furthermore, the separator 5 includes a first separator. The through hole 53 includes a first through hole. The first separator is disposed at the first end of the stator core 21. A first sealing cavity is formed between the first separator, the inner surface of the housing 1, and the first end face of the stator core 21. The first end of the second cooling groove 12 communicates with the first sealing cavity. The first sealing cavity corresponds to the position of the first end winding in the circumferential direction. The first through hole is disposed on the first separator for guiding the cooling oil in the first sealing cavity to flow out, and the first through hole corresponds to the position of the first end winding in the circumferential direction.

[0088] And / or, the separator 5 includes a second separator; the through hole 53 includes a second through hole; the second separator is disposed at the second end of the stator core 21, and a second sealing cavity is formed between the second separator, the inner surface of the housing 1, and the second end face of the stator core 21; the second end of the second cooling groove 12 communicates with the second sealing cavity; the second sealing cavity corresponds to the position of the second end winding in the circumferential direction; the second through hole is disposed on the second separator, and the second through hole is used to guide the cooling oil in the second sealing cavity to flow out; and the second through hole corresponds to the position of the second end winding in the circumferential direction.

[0089] Further, the first separator includes a first annular separator portion and a first axially extending portion; the first annular separator portion is disposed circumferentially around the rotating shaft 32; the first axially extending portion is disposed circumferentially around the rotating shaft 32; the first end of the first axially extending portion is connected to the inner circumferential side of the first annular separator portion, and the first axially extending portion extends in a direction approaching the stator core 21; the outer circumferential side of the first annular separator portion is connected to the inner surface of the housing 1; the second end of the first axially extending portion is connected to the first end face of the stator core.

[0090] Further, the second separator includes a second annular separator portion and a second axially extending portion; the second annular separator portion is disposed circumferentially around the rotating shaft 32; the second axially extending portion is disposed circumferentially around the rotating shaft 32; the second end of the second axially extending portion is connected to the inner circumferential side of the second annular separator portion, and the second axially extending portion extends in a direction approaching the stator core 21; the outer circumferential side of the second annular separator portion is connected to the inner surface of the housing 1; the second end of the second axially extending portion is connected to the second end face of the stator core.

[0091] Further, the stop surface 61 includes a first stop surface; the end face of the first annular separator portion far from the first axially extending portion is in press contact with the first stop surface.

[0092] Further, the stop surface 61 includes a second stop surface; the end face of the second annular separator portion far from the second axially extending portion is in press contact with the second stop surface.

[0093] Further, the housing 1 includes a housing body 14, a first end cover 15, and a second end cover 16. The first end cover 15 is installed at the first end of the housing body 14, and the second end cover 16 is disposed at the second end of the housing body 14.

[0094] Further, an axially extending second pressing member is provided on the second end cover 16; the first end of the second pressing member is connected to the inner surface of the second end cover 16; when the motor further includes a second separator, and the second separator includes a second annular separator portion and a second axially extending portion, the second end of the second pressing member is in press contact with the end face of the second annular separator portion far from the second axially extending portion.

[0095] See in combination Figure 3As shown, the present application also discloses some embodiments. The motor further includes a separating portion 73 and a first bearing 71. The first bearing 71 is disposed at the first end of the rotating shaft 32 and sleeved outside the rotating shaft 32. The separating portion 73 is disposed inside the housing 1 and is an annular structure circumferentially disposed around the rotating shaft 32. The outer peripheral side of the separating portion 73 is connected to the inner surface of the casing 14, and the inner peripheral side of the separating portion 73 is connected to the outer surface of the first bearing 71. A first accommodation cavity is formed between the first bearing 71, the separating portion 73, and the first end cover 15. A total oil inlet 731 is provided on the separating portion 73 or the end cover, and the total oil inlet 731 is used to guide the cooling oil into the first accommodation cavity. When the rotating shaft 32 is provided with a rotor oil inlet, the rotor oil inlet communicates with the first accommodation cavity. The stator oil inlet 171 communicates with the first accommodation cavity. The cooling oil enters the first accommodation cavity through the total oil inlet 731 and flows into the stator oil inlet 171 and the rotor oil inlet through the first accommodation cavity.

[0096] Further, an axially extending first pressing member is provided on the outer peripheral edge of the separating portion 73. The first end of the first pressing member is connected to the outer peripheral wall of the separating portion 73. When the motor further includes a first separating member including a first annular separating portion and a first axially extending portion, the second end of the first pressing member is press-connected to the end face of the first annular separating portion away from the first axially extending portion.

[0097] Further, the first pressing member is an annular member circumferentially disposed around the rotating shaft 32.

[0098] And / or, the first stop surface is an annular surface circumferentially disposed around the rotating shaft 32.

[0099] Further, an oil storage area 151 is provided on the first end cover 15. The oil storage area 151 is formed by a depression of the inner surface of the first end cover 15 and corresponds to the position of the first bearing 71 axially. The oil storage area 151 and the bearing form a second accommodation cavity, and the second accommodation cavity communicates with the first accommodation cavity. The cooling oil enters the first accommodation cavity through the total oil inlet 731 and flows into the second accommodation cavity through the first accommodation cavity to lubricate the first bearing.

[0100] Further, the first bearing is an open bearing.

[0101] Further, the first accommodation cavity and the second accommodation cavity are communicated through an oil guiding hole 152. The cooling oil enters the first accommodation cavity through the total oil inlet 731, flows into the stator oil inlet 171 and the second accommodation cavity through the first accommodation cavity, and then enters the rotor oil inlet through the second accommodation cavity to cool the rotor assembly.

[0102] Further, the rotor oil inlet is located in the second accommodation cavity.

[0103] Further, the motor further includes an oil tank, which is communicated with the total oil inlet 731.

[0104] Further, the motor further includes an oil return passage 18, which communicates the lowest part inside the housing 1 with the oil tank; the oil return passage 18 is used to guide the cooling oil at the bottom of the housing 1 back to the oil tank.

[0105] Further, an axially extending oil inlet passage 17 is provided on the housing 14. The stator oil inlet 171 is communicated with the first cooling groove 11 through the oil inlet passage 17. The stator oil inlet 171 introduces the cooling oil into the oil inlet passage 17, then flows into the first cooling groove 11, and then flows into the second cooling groove 12 to cool the stator assembly.

[0106] Further, a rib extending axially is provided on the outer peripheral side of the housing; an axially extending oil inlet passage 17 is provided inside the rib; the first end of the oil inlet passage 17 extends to the first end of the housing 14, and the second end of the oil inlet passage 17 extends to the second end of the housing 14; the first end of the oil inlet passage 17 is the end where the stator oil inlet 171 is located.

[0107] Referring to Figures 11-12 As shown, the present application also discloses some embodiments. An oil pump 8 and a heat exchanger 9 are provided on the outer surface of the first end cover 15; an oil pump inlet and an oil pump outlet are provided on the oil pump 8; the oil pump 8 inlet is communicated with the oil tank; the oil pump 8 outlet is communicated with the heat exchanger 9 oil inlet; the heat exchanger 9 oil outlet is communicated with the total oil inlet 731.

[0108] Further, the interior of the housing 1 is sequentially divided into a first chamber, a second chamber, and a third chamber from the direction of the first end cover 15 to the second end cover 16; the bottom of the housing 1 forms an oil tank; the oil return passage 18 is provided at the bottom of the housing 14 and communicates the bottom of the third chamber with the first chamber.

[0109] Further, the motor further includes a first connecting pipe 91, and the first connecting pipe 91 communicates the outlet of the oil pump 8 with the oil inlet of the heat exchanger 9;

[0110] And / or, the motor further includes a second connecting pipe 92, and the second connecting pipe 92 communicates the oil outlet of the heat exchanger 9 with the total oil inlet 731.

[0111] Further, the second connecting pipe 92 is provided inside the housing.

[0112] Further, the oil pump 8 and the oil tank are axially corresponding in position.

[0113] Further, the motor further includes a second bearing 72, and the second bearing 72 is provided at the second end of the rotating shaft 32 and is sleeved outside the rotating shaft 32.

[0114] Further, the second end of the rotating shaft 32 extends out of the second end cover 16, and a oil seal 93 is sleeved on the rotating shaft 32. The inner peripheral side of the oil seal 93 is in contact with the outer surface of the rotating shaft 32, and the outer peripheral side of the oil seal 93 is in contact with the second end cover 16; a dynamic sealing structure is formed between the oil seal 93, the rotating shaft 32 and the second end cover 16.

[0115] Further, the rotor oil outlet 321 further includes a third rotor oil outlet 321. The third rotor oil outlet 321 is axially located between the second bearing 72 and the oil seal 93, and the oil flowing out of the third rotor oil outlet 321 can lubricate the bearing and the oil seal.

[0116] According to an embodiment of the present application, an automobile includes a motor, and the motor is the above-mentioned motor.

[0117] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous manners can be freely combined and superimposed.

[0118] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the technical principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A motor, characterized in that, it includes a housing (1), a stator assembly is arranged inside the housing (1), the stator assembly includes a stator core (21), and a first cooling groove (11) and a second cooling groove (12) which are communicated with each other are arranged on the inner surface of the housing (1); the first cooling groove (11) is arranged circumferentially around the central axis of the stator core (21); the second cooling groove (12) extends along the axial direction of the stator core (21), a stator oil inlet (171) is arranged on the housing (1), and the stator oil inlet (171) is used for guiding cooling oil into the first cooling groove (11); an end winding (22) wound by a stator coil is arranged at the end of the stator core (21); the second cooling groove (12) extends to the end of the stator core (21); the motor further includes a separator (5), the separator (5) is arranged at one end of the stator core (21), and the separator (5) is located on the outer peripheral side of the end winding (22); a sealing cavity is formed between the separator (5), the inner surface of the housing (1) and the end face of the stator core (21); the second cooling groove (12) communicates with the sealing cavity; a through hole (53) is arranged on the separator (5), the through hole (53) is used for guiding the cooling oil in the sealing cavity to flow out, and the through hole (53) corresponds to the position where the end winding (22) is located.

2. The motor according to claim 1, characterized in that, the motor further includes a rotor core (31) and a rotating shaft (32) both arranged inside the housing (1); the rotor core (31) is sleeved outside the rotating shaft (32), the inside of the rotating shaft (32) is a hollow structure, a rotor oil inlet and a rotor oil outlet (321) are arranged on the rotating shaft (32), the rotor oil inlet is used for guiding cooling oil into the hollow structure, and the rotor oil outlet (321) is used for guiding the cooling oil in the hollow structure to flow out.

3. The motor according to claim 2, characterized in that, the central axis of the stator core (21) is parallel to the horizontal plane; and / or, the outer peripheral wall of the stator core (21) is attached to the inner surface of the housing (1); and / or, the first cooling groove is an annular groove arranged circumferentially around the central axis of the stator core.

4. The motor according to claim 2, characterized in that, a plurality of ribs arranged at intervals in the circumferential direction of the stator core (21) are further arranged on the inner surface of the housing (1), each rib extends along the axial direction of the stator core (21), and the second cooling groove (12) is formed between two adjacent ribs (13).

5. The motor according to claim 2, characterized in that, The stator assembly is sleeved on the outer peripheral side of the rotor core (31), and a rotor extrusion part (4) is arranged at the end of the rotor core (31); the rotor extrusion part (4) is located on the inner peripheral side of the end winding (22); an oil inlet (41) of the extrusion part is arranged on the rotor extrusion part (4), and the oil inlet (41) of the extrusion part is communicated with the rotor oil outlet (321); an oil passage (42) of the extrusion part is arranged in the rotor extrusion part (4); and an oil outlet (43) of the extrusion part is arranged on the surface of the rotor extrusion part (4) close to the end winding (22); the oil outlet (43) of the extrusion part corresponds to the position of the end winding (22); the oil inlet (41) of the extrusion part, the oil passage (42) of the extrusion part and the oil outlet (43) of the extrusion part are communicated in sequence.

6. The motor according to claim 5, wherein, the end winding (22) includes a first end winding and a second end winding; the first end winding is arranged at the first end of the stator core (21), and the second end winding is arranged at the second end of the stator core (21).

7. The motor according to claim 6, wherein, the rotor extrusion part (4) includes a first rotor extrusion part; the first rotor extrusion part is arranged at the first end of the rotor, and the first rotor extrusion part corresponds to the position of the first end winding; a first oil inlet of the extrusion part is arranged on the first rotor extrusion part; the first oil inlet of the extrusion part is communicated with the rotor oil outlet (321); a first oil passage of the extrusion part is arranged in the first rotor extrusion part, and a first oil outlet of the extrusion part is arranged on the surface of the first rotor extrusion part close to the first end winding; the first oil inlet of the extrusion part, the first oil passage of the extrusion part and the first oil outlet of the extrusion part are communicated in sequence; and / or, the rotor extrusion part (4) includes a second rotor extrusion part; the second rotor extrusion part is arranged at the second end of the rotor, and the second rotor extrusion part corresponds to the position of the second end winding in the circumferential direction; a second oil inlet of the extrusion part is arranged on the second rotor extrusion part, and the second oil inlet of the extrusion part is communicated with the rotor oil outlet (321); a second oil passage of the extrusion part is arranged in the second rotor extrusion part, and a second oil outlet of the extrusion part is arranged on the surface of the second rotor extrusion part close to the second end winding; the second oil inlet of the extrusion part, the second oil passage of the extrusion part and the second oil outlet of the extrusion part are communicated in sequence.

8. The motor according to claim 7, wherein, the rotor oil outlet (321) includes a first rotor oil outlet; the first rotor oil outlet is communicated with the first oil inlet of the extrusion part; and / or, the rotor oil outlet (321) includes a second rotor oil outlet; the second rotor oil outlet is communicated with the second oil inlet of the extrusion part.

9. The motor according to claim 6, wherein, The rotor extrusion part (4) is an annular structure circumferentially arranged around the rotating shaft (32), and the inner peripheral wall of the rotor extrusion part (4) fits with the outer surface of the rotating shaft (32); the oil inlet of the extrusion part (41) is opened on the inner peripheral wall of the rotor extrusion part (4), and corresponds to the rotor oil outlet (321) in both axial and circumferential positions; the oil channel of the extrusion part (42) is arranged inside the rotor extrusion part (4), and the oil outlet of the extrusion part (43) is arranged on the outer peripheral wall of the rotor extrusion part (4).

10. The motor according to claim 9, wherein, the rotor extrusion part (4) includes a coaxial first annular part and a second annular part, and the inner diameters of the cross-sections of the first annular part and the second annular part are equal; the second annular part is arranged on the first end of the first annular part, and the outer peripheral wall of the second annular part is located on the inner circumferential side of the outer peripheral wall of the first annular part; the inner peripheral walls of the first annular part and the second annular part both fit with the rotating shaft (32); the oil inlet of the extrusion part (41) is arranged on the inner peripheral wall of the first annular part; the oil outlet of the extrusion part (43) is arranged on the outer peripheral wall of the second annular part; the oil channel of the extrusion part (42) includes a first oil channel and a second oil channel that are connected to each other, the first oil channel is arranged inside the first annular part, and the second oil channel is arranged inside the second annular part; the oil inlet of the extrusion part (41) connects the rotor oil outlet (321) and the first oil channel; the oil outlet of the extrusion part (43) is connected to the second oil channel.

11. The motor according to claim 10, wherein, a receiving groove is arranged at the connection position between the oil inlet of the extrusion part (41) and the oil channel of the extrusion part (42); the receiving groove connects the oil inlet of the extrusion part (41) and the oil channel of the extrusion part (42).

12. The motor according to claim 10, wherein, the oil outlet of the extrusion part (43) is provided with a plurality of them, and the plurality of oil outlets of the extrusion part (43) are circumferentially arranged around the rotating shaft (32).

13. The motor according to claim 6, wherein, the separator (5) includes an annular separation part (51) and an axially extending part (52); the annular separation part (51) is circumferentially arranged around the rotating shaft (32); the axially extending part (52) is circumferentially arranged around the rotating shaft (32); the outer peripheral side of the annular separation part (51) is connected to the inner surface of the housing (1), and the inner peripheral side is connected to the first end of the axially extending part (52); the axially extending part (52) extends towards the direction close to the stator core (21); the second end of the axially extending part (52) is connected to the end of the stator core; the through hole (53) is arranged on the axially extending part (52) and corresponds to the position of the end winding (22).

14. The motor according to claim 2, wherein, the through hole (53) is provided with a plurality of them, and the plurality of through holes (53) are circumferentially arranged around the rotating shaft (32).

15. The motor according to claim 13, wherein, a radial stop surface (61) is provided on the inner surface of the housing (1); an end surface of the annular partition portion (51) away from the axial extension portion (52) is in press contact with the stop surface (61).

16. The motor according to claim 15, wherein, an annular groove circumferentially arranged around the rotating shaft (32) is formed on the stop surface (61), and an annular sealing ring (62) is embedded in the annular groove.

17. The motor according to claim 16, wherein, the partition member (5) includes a first partition member; the through hole (53) includes a first through hole; the first partition member is arranged at a first end of the stator core (21), and a first sealing cavity is formed between the first partition member, the inner surface of the housing (1) and the first end surface of the stator core (21); a first end of the second cooling groove (12) communicates with the first sealing cavity; the first sealing cavity corresponds to the position of the first end winding in the circumferential direction; the first through hole is arranged on the first partition member, and the first through hole is used for guiding the cooling oil in the first sealing cavity to flow out; and the first through hole corresponds to the position of the first end winding in the circumferential direction; and / or, the partition member (5) includes a second partition member; the through hole (53) includes a second through hole; the second partition member is arranged at a second end of the stator core (21), and a second sealing cavity is formed between the second partition member, the inner surface of the housing (1) and the second end surface of the stator core (21); a second end of the second cooling groove (12) communicates with the second sealing cavity; the second sealing cavity corresponds to the position of the second end winding in the circumferential direction; the second through hole is arranged on the second partition member, and the second through hole is used for guiding the cooling oil in the second sealing cavity to flow out; and the second through hole corresponds to the position of the second end winding in the circumferential direction.

18. The motor according to claim 17, wherein, the first partition member includes a first annular partition portion and a first axial extension portion; the first annular partition portion is circumferentially arranged around the rotating shaft (32); the first axial extension portion is circumferentially arranged around the rotating shaft (32); a first end of the first axial extension portion is connected to the inner circumferential side of the first annular partition portion, and the first axial extension portion extends in a direction close to the stator core (21); the outer circumferential side of the first annular partition portion is connected to the inner surface of the housing (1); a second end of the first axial extension portion is connected to the first end surface of the stator core.

19. The motor according to claim 17, wherein, The second separating member includes a second annular separating portion and a second axially extending portion; the second annular separating portion is circumferentially arranged around the rotating shaft (32); the second axially extending portion is circumferentially arranged around the rotating shaft (32); the second end of the second axially extending portion is connected to the inner circumferential side of the second annular separating portion, and the second axially extending portion extends in a direction close to the stator core (21); the outer circumferential side of the second annular separating portion is connected to the inner surface of the housing (1); the second end of the second axially extending portion is connected to the second end face of the stator core.

20. The motor according to claim 18, wherein, the stop surface (61) includes a first stop surface; the end face of the first annular separating portion away from the first axially extending portion is in pressing contact with the first stop surface.

21. The motor according to claim 19, wherein, the stop surface (61) includes a second stop surface; the end face of the second annular separating portion away from the second axially extending portion is in pressing contact with the second stop surface.

22. The motor according to any one of claims 2-19, wherein, the housing (1) includes a housing body (14), a first end cover (15) and a second end cover (16), the first end cover (15) is installed at the first end of the housing body (14), and the second end cover (16) is arranged at the second end of the housing body (14).

23. The motor according to claim 22, wherein, the second end cover (16) is provided with an axially extending second pressing member; the first end of the second pressing member is connected to the inner surface of the second end cover (16); when the motor further includes a second separating member, and the second separating member includes a second annular separating portion and a second axially extending portion, the second end of the second pressing member is in pressing contact with the end face of the second annular separating portion away from the second axially extending portion.

24. The motor according to claim 22, wherein, the motor further includes a separating portion (73) and a first bearing (71), the first bearing (71) is arranged at the first end of the rotating shaft (32), and the first bearing (71) is sleeved outside the rotating shaft (32), the separating portion (73) is arranged inside the housing (1), and the separating portion (73) is an annular structure circumferentially arranged around the rotating shaft (32); the outer circumferential side of the separating portion (73) is connected to the inner surface of the housing body (14), and the inner circumferential side of the separating portion (73) is connected to the outer surface of the first bearing (71); a first accommodating cavity is formed between the first bearing (71), the separating portion (73) and the first end cover (15); a total oil inlet (731) is provided on the separating portion (73) or the end cover, and the total oil inlet (731) is used to guide cooling oil into the first accommodating cavity; when the rotating shaft (32) is provided with a rotor oil inlet, the rotor oil inlet communicates with the first accommodating cavity; the stator oil inlet (171) communicates with the first accommodating cavity.

25. The motor according to claim 24, It is characterized in that a first pressing member extending axially is provided on the outer peripheral edge of the partition portion (73); a first end of the first pressing member is connected to the outer peripheral wall of the partition portion (73); when the motor further includes a first partition member including a first annular partition portion and a first axially extending portion, a second end of the first pressing member is in press contact with an end surface of the first annular partition portion away from the first axially extending portion.

26. The motor according to claim 25, It is characterized in that the first pressing member is an annular member circumferentially arranged around the rotating shaft (32).

27. The motor according to claim 20, It is characterized in that the first stop surface is an annular surface circumferentially arranged around the rotating shaft (32).

28. The motor according to claim 24, It is characterized in that an oil storage area (151) is provided on the first end cover (15), the oil storage area (151) is formed by being recessed outward from the inner surface of the first end cover (15), and the oil storage area (151) corresponds to the position of the first bearing (71) axially; the oil storage area (151) and the bearing form a second accommodation cavity, and the second accommodation cavity communicates with the first accommodation cavity.

29. The motor according to claim 28, It is characterized in that the first accommodation cavity and the second accommodation cavity communicate through an oil guiding hole (152).

30. The motor according to claim 28, It is characterized in that the rotor oil inlet is located in the second accommodation cavity.

31. The motor according to claim 24, It is characterized in that the motor further includes an oil tank, and the oil tank communicates with the total oil inlet (731).

32. The motor according to claim 31, It is characterized in that the motor further includes an oil return channel (18), and the oil return channel (18) communicates the lowest part inside the housing (1) with the oil tank; the oil return channel (18) is used to guide the cooling oil at the bottom of the housing (1) to flow back to the oil tank.

33. The motor according to claim 24, It is characterized in that an axially extending oil inlet channel (17) is provided on the housing (14), and the stator oil inlet (171) communicates with the first cooling groove (11) through the oil inlet channel (17).

34. The motor according to claim 33, It is characterized in that a convex strip extending axially is provided on the outer peripheral side of the housing; an axially extending oil inlet channel (17) is provided inside the convex strip; a first end of the oil inlet channel (17) extends to a first end of the housing (14), and a second end of the oil inlet channel (17) extends to a second end of the housing (14); the first end of the oil inlet channel (17) is the end where the stator oil inlet (171) is located.

35. The motor according to claim 32, It is characterized in that An oil pump (8) and a heat exchanger (9) are provided on the outer surface of the first end cover (15); an oil pump inlet and an oil pump outlet are provided on the oil pump (8); the inlet of the oil pump (8) is communicated with the fuel tank; the outlet of the oil pump (8) is communicated with the oil inlet of the heat exchanger (9); the oil outlet of the heat exchanger (9) is communicated with the total oil inlet (731).

36. The motor according to claim 32, characterized in that, the interior of the housing (1) is sequentially divided into a first chamber, a second chamber and a third chamber from the first end cover (15) to the second end cover (16); the bottom of the housing (1) forms the fuel tank; the oil return passage (18) is provided at the bottom of the housing (14) and communicates the bottom of the third chamber with the first chamber.

37. The motor according to claim 35, characterized in that, the motor further includes a first connecting pipe (91), and the first connecting pipe (91) communicates the outlet of the oil pump (8) with the oil inlet of the heat exchanger (9); and / or, the motor further includes a second connecting pipe (92), and the second connecting pipe (92) communicates the oil outlet of the heat exchanger (9) with the total oil inlet (731).

38. The motor according to claim 37, characterized in that, the second connecting pipe (92) is provided inside the housing.

39. The motor according to claim 24, characterized in that, the motor further includes a second bearing (72), the second bearing (72) is provided at the second end of the rotating shaft (32), and the second bearing (72) is sleeved outside the rotating shaft (32).

40. The motor according to claim 39, characterized in that, the second end of the rotating shaft (32) extends out of the second end cover (16), and a oil seal (93) is sleeved on the rotating shaft (32). The inner peripheral side of the oil seal (93) is attached to the outer surface of the rotating shaft (32), and the outer peripheral side of the oil seal (93) is attached to the second end cover (16); a dynamic sealing structure is formed between the oil seal (93), the rotating shaft (32) and the second end cover (16).

41. The motor according to claim 40, characterized in that, the rotor oil outlet (321) further includes a third rotor oil outlet (321), and the third rotor oil outlet (321) is axially located between the second bearing (72) and the oil seal (93).

42. An automobile, comprising a motor, characterized in that, the motor is the motor according to any one of claims 1-41.

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