Motor, power assembly and vehicle

Abstract

The utility model discloses a motor, a power assembly and a vehicle. The motor comprises a housing; the sealing assembly is arranged in the shell, and an annular closed cavity is formed by the sealing assembly and the inner wall of the shell; and the stator assembly is positioned in the closed cavity. According to the technical scheme, the structure is simple, and installation is easy.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and in particular, relates to a motor, a powertrain and a vehicle. Background Art

[0002] With the development of motors and the increase in power density, motors have gradually evolved from water cooling to oil cooling. The cooling oil mainly cools the stator and takes away heat.

[0003] In the prior art, the cooling sealing structure of the stator in the motor usually adopts a seal that is connected to the housing at one end and to the stator at the other end, and the seal, stator and housing together form a sealed oil-immersed space. However, this structure has poor sealing performance, a relatively complex structure, and high requirements for installation technology. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a motor, a powertrain and a vehicle.

[0005] According to a first aspect of an embodiment of the present application, there is provided a motor, comprising:

[0006] case;

[0007] A sealing assembly, wherein the sealing assembly is disposed inside the housing and forms an annular closed cavity with the inner wall of the housing;

[0008] The stator assembly is located in the closed cavity.

[0009] Optionally, the stator assembly comprises a stator core and a stator winding, the stator core is provided with a plurality of tooth slots penetrating in the axial direction, the inner wall of the stator core is provided with notches respectively connected to the plurality of tooth slots, and the stator winding is at least partially arranged inside the tooth slots;

[0010] The sealing assembly comprises a plurality of sealing strips, and the plurality of sealing strips are embedded in the grooves in a one-to-one correspondence.

[0011] Optionally, the sealing assembly further comprises a first sealing ring and a second sealing ring which are spaced apart in the axial direction, one end of the plurality of sealing strips is connected to the first sealing ring, and the other end of the plurality of sealing strips is connected to the second sealing ring;

[0012] The closed cavity is surrounded by the first sealing ring, the second sealing ring, a plurality of sealing strips and an inner wall of the housing.

[0013] Optionally, the first sealing ring comprises a first sub-ring and a second sub-ring, the first sub-ring and the second sub-ring are spaced apart in the axial direction, a sealing member is provided between the first sub-ring and the second sub-ring, and the second sub-ring is between the first sub-ring and the plurality of sealing strips;

[0014] The second sealing ring, the plurality of sealing strips and the second sub-ring are an integrated piece.

[0015] Optionally, a first receiving groove is formed at one end of the first sub-ring close to the second sub-ring, and a second receiving groove is formed at one end of the second sub-ring close to the first sub-ring, and the sealing member is accommodated in the first receiving groove and the second receiving groove.

[0016] Optionally, one end of the first sealing ring facing away from the plurality of sealing strips abuts against the inner wall of the housing, and the motor further comprises a first sealing portion, which is arranged between the first sealing ring and the inner wall of the housing;

[0017] and / or,

[0018] One end of the second sealing ring facing away from the plurality of sealing strips abuts against the inner wall of the housing. The motor further comprises a second sealing portion, which is arranged between the second sealing ring and the inner wall of the housing.

[0019] Optionally, a first groove and a second groove are provided on the inner wall of the shell, and one end of the first sealing ring away from the plurality of sealing strips is accommodated in the first groove, and one end of the second sealing ring away from the plurality of sealing strips is accommodated in the second groove.

[0020] Optionally, the stator assembly includes a stator core and a stator winding, the stator winding includes a first part and a second part, the first part protrudes from one axial end of the stator core, and the second part protrudes from the other axial end of the stator core;

[0021] The closed cavity comprises a first accommodating cavity for accommodating the first part and a second accommodating cavity for accommodating the second part;

[0022] The stator core is provided with a cooling channel, and the cooling channel communicates with the first accommodating cavity and the second accommodating cavity.

[0023] Optionally, an oil inlet hole is formed on the shell, and the oil inlet hole is communicated with the first accommodating cavity. An oil outlet hole is formed on the shell, and the oil outlet hole is communicated with the second accommodating cavity.

[0024] Optionally, the cooling channel includes a plurality of first channels, the plurality of first channels are arranged at intervals along the circumferential direction of the stator core, and the plurality of first channels are formed between the outer circumferential surface of the stator core and the inner wall of the shell.

[0025] Optionally, the cooling channel includes a plurality of second channels, the plurality of second channels are arranged at intervals along the circumference of the stator core, and the plurality of second channels are arranged inside the stator core.

[0026] According to a second aspect of an embodiment of the present application, a power assembly is provided, comprising the above-mentioned motor.

[0027] According to a third aspect of an embodiment of the present application, a vehicle is provided, comprising:

[0028] any of the above-mentioned motors; or

[0029] The powertrain described above.

[0030] One technical effect of an embodiment of the present application is that an annular closed cavity is formed by the sealing assembly and the shell, so that the stator assembly is located in the closed cavity, and its sealing performance is good, and the structure is simple and easy to install; and the sealing assembly and the shell directly form an annular closed cavity, which can improve its sealing performance.

[0031] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0033] Figure 1 is a schematic diagram of the structure of the motor in the embodiment of the present application;

[0034] Figure 2 for Figure 1 A local enlarged view of point A in FIG.

[0035] Figure 3 is a schematic structural diagram of a stator assembly in an embodiment of the present application;

[0036] Figure 4 is a schematic structural diagram of a stator assembly in an embodiment of the present application;

[0037] Figure 5 for Figure 4 Sectional view at the middle BB;

[0038] Figure 6 It is a partial enlarged view of the stator assembly in the embodiment of the present application;

[0039] Figure 7 This is a schematic diagram of the structure of the first sealing member in an embodiment of the present application;

[0040] Figure 8This is a schematic diagram of the structure of the first sealing member in an embodiment of the present application;

[0041] Fig. 9 for Figure 8 Sectional view at CC;

[0042] Fig.10 for Fig. 9 A local enlarged view of point E in FIG.

[0043] Fig.11 for Figure 8 Sectional view at DD in the middle;

[0044] Fig.12 is a cross-sectional view of a second sealing member in an embodiment of the present application;

[0045] Fig.13 for Fig.12 A local enlarged view of point F in FIG.

[0046] Description of reference numerals:

[0047] Shell 1; end cover 11; second groove 111; outer shell 12; first groove 121; oil inlet hole 13; oil outlet hole 14; first end wall 15; second end wall 16; sealing assembly 2; first sealing ring 21; first accommodating groove 211; sealing strip 212; third accommodating groove 213; first sub-ring 214; second sub-ring 215; second sealing ring 22; second accommodating groove 221; sealing member 23; stator assembly 3; stator core 31; stator tooth 311; tooth groove 312; first end face 313; second end face 314; cooling channel 315; first channel 3151; second channel 3152; accommodating cavity 316; notch 317; stator winding 32; first part 321; second part 322; closed cavity 4; first accommodating cavity 41; second accommodating cavity 42; oil-free cavity 5; rotor assembly 6; first sealing portion 8; second sealing portion 7. DETAILED DESCRIPTION

[0048] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0049] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0050] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0051] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0052] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0053] First, the first direction and the second direction in the embodiment of the present application are described in the attached drawings. Figure 1 In the directions marked in , the first direction and the second direction intersect.

[0054] like Figure 1-Figure 13 As shown, according to the first aspect of an embodiment of the present application, a motor is provided, comprising a housing 1, a sealing assembly 2 and a stator assembly 3; the sealing assembly 2 is arranged inside the housing 1 and forms an annular closed cavity 4 with the inner wall of the housing 1; the stator assembly 3 is located in the closed cavity 4.

[0055] like Figure 1 As shown, the motor provided in the present application includes a housing 1, a sealing assembly 2 and a stator assembly 3. An accommodating space is formed inside the housing 1, and the sealing assembly 2 and the stator assembly 3 are both arranged in the accommodating space.

[0056] Among them, the sealing component 2 is annular, and the sealing component 2 is arranged inside the accommodating space, and can divide the accommodating space into two parts, namely a closed cavity 4 and an oil-free cavity 5, and the closed cavity 4 is an oil-immersed space; the sealing component 2 has an inner surface and an outer surface, the inner surface is located in the oil-free cavity 5, and the outer surface is located in the closed cavity 4; the stator component 3 is arranged on the outer surface of the sealing component 2, that is, the stator component 3 is sleeved on the outer surface of the sealing component 2, so that the stator component 3 can be located inside the closed cavity 4, so that the stator component 3 can be cooled by oil cooling.

[0057] To further explain, the motor of the present application forms a closed cavity 4 with the sealing assembly 2 and the shell 1, so that the stator assembly 3 is located in the closed cavity 4, and its structure is simple and easy to install; and it can prevent the cooling oil located in the closed cavity 4 from entering the oil-free cavity 5, thereby preventing the rotor assembly 6 located in the oil-free cavity 5 from being immersed in the cooling oil, and further preventing the cooling oil from increasing the drag torque of the rotor assembly 6, thereby avoiding affecting the output power of the motor.

[0058] In an optional embodiment, the stator assembly 3 is in contact with the outer surface of the sealing assembly 2 .

[0059] Further explanation, the stator assembly 3 is arranged around the outer surface of the sealing assembly 2 and fits with the outer surface of the sealing assembly 2. The oil-free cavity 5 is used to set the rotor assembly 6. The air gap between the rotor assembly 6 and the stator assembly 3 is small, so the stator assembly 3 fits with the outer surface of the sealing assembly 2, so that a sufficient gap is left between the sealing assembly 2 and the rotor assembly 6 to prevent the sealing assembly 2 from affecting the rotation of the rotor assembly 6.

[0060] In an optional implementation, the sealing assembly 2 is partially embedded in the stator assembly 3 along the first direction.

[0061] Among them, the oil-free cavity 5 is used to set the rotor assembly 6, the air gap between the rotor assembly 6 and the stator assembly 3 is small, and the sealing assembly 2 is set in the air gap. When the sealing assembly 2 is partially embedded in the stator assembly 3 along the first direction, the air gap space occupied by the sealing assembly 2 can be made smaller, and the structural strength of the sealing assembly 2 can also be ensured.

[0062] In an optional embodiment, the sealing component 2 can be a sealing ring, which is arranged inside the shell 1, and the two ends of the sealing ring are respectively connected to the inner walls on the opposite sides of the shell 1. The sealing ring can divide the accommodating space into a closed cavity 4 and an oil-free cavity 5. The sealing component 2 is a sealing ring and has the characteristics of simple structure.

[0063] In an optional embodiment, the stator assembly 3 includes a stator core 31 and a stator winding 32, the stator core 31 is provided with a plurality of tooth slots 312 extending axially therethrough, the inner wall of the stator core 31 is provided with slots 317 respectively connected to the plurality of tooth slots 312, and the stator winding 32 is at least partially disposed inside the tooth slots 317; the sealing assembly 2 includes a plurality of sealing strips 212, and the plurality of sealing strips 212 are embedded in the slots 317 one by one.

[0064] like Figure 1 As shown, the stator assembly 3 includes a stator core 31 and a stator winding 32 .

[0065] Among them, a tooth slot 312 is formed on the inner wall of the stator core 31, and the tooth slot 312 is arranged along the second direction, that is, the tooth slot 312 is arranged along the axial direction of the stator core 31, and the tooth slot passes through the stator core 31 along the second direction; multiple tooth slots 312 are distributed at intervals along the circumference of the stator core 31; specifically, at least two stator teeth 311 are arranged on the inner wall of the stator core 31, a tooth slot 312 is formed between two adjacent stator teeth 311, and a notch 317 is formed at the end of the two adjacent stator teeth 311 away from the inner wall of the stator core 31, and the notch 317 is connected to the tooth slot 312.

[0066] To further illustrate, the stator winding 32 is arranged inside the tooth slot 312, and the internal part of the tooth slot 312 is provided with the stator winding 32, and the stator winding 32 approaches the direction away from the slot 317. The part of the tooth slot 312 where the stator winding 32 is not provided and the end of the stator winding 32 close to the slot 317 will form a accommodating cavity 316.

[0067] Further explanation, such as Figure 3 , Figure 4 , Figure 5 and Fig.11 As shown, the sealing assembly 2 includes a plurality of sealing strips 212, and the plurality of sealing strips 212 are embedded in the notch 317 one by one, that is, embedded in the accommodating cavity 316 from the notch 317. The sealing strips 212 are arranged along the second direction, and the plurality of sealing strips 212 are distributed at intervals along the circumference of the stator core 31, and a third accommodating groove 213 is formed between two adjacent sealing strips 212; the sealing strips 212 are embedded in the accommodating cavity 316, and the stator teeth 311 are embedded in the third accommodating groove 213, so that the sealing assembly 2 can occupy a smaller air gap while ensuring the structural strength of the sealing assembly 2.

[0068] In an optional implementation, the sealing strip 212 is connected to the stator core 31 by injection molding, so that the sealing assembly 2 and the stator assembly 3 have a higher connection strength and can save installation steps.

[0069] To further illustrate, the manufacturing process of the stator assembly 3 and the sealing strip 212 is: first, the sealing strip 212 is injection molded onto the stator core 31 through an injection mold, and then the stator winding 32 is inserted into the tooth slot 312 of the stator core 31, and the stator winding 32 is twisted, welded, coated, and painted.

[0070] In an optional embodiment, the sealing assembly 2 also includes a first sealing ring 21 and a second sealing ring 22 which are spaced apart in the axial direction, one end of a plurality of sealing strips 212 is connected to the first sealing ring 21, and the other end of the plurality of sealing strips 212 is connected to the second sealing ring 22; the closed cavity 4 is surrounded by the first sealing ring 21, the second sealing ring 22, the plurality of sealing strips 212 and the inner wall of the shell 1.

[0071] like Figure 1 As shown, the sealing assembly 2 further includes a first sealing ring 21 and a second sealing ring 22 .

[0072] Among them, the first sealing ring 21 and the second sealing ring 22 are spaced apart in the axial direction, that is, the first sealing ring 21 and the second sealing ring 22 are spaced apart along the second direction; one end of the sealing strip 212 is connected to the first sealing ring 21, and the other end of the sealing strip 212 is connected to the second sealing ring 22.

[0073] Furthermore, the closed cavity 4 is surrounded by the first sealing ring 21 , the second sealing ring 22 , a plurality of sealing strips 212 and the inner wall of the housing 1 .

[0074] To further illustrate, part of the stator winding 32 is embedded in the stator core 31, and part of it protrudes from the end of the stator core 31 along the axial direction of the stator core 31; part of the first sealing ring 21 is in contact with the side of the stator winding 32 away from the housing 1, so that there is no gap between the first sealing ring 21 and the stator winding 32, thereby reducing the space occupied by the first sealing ring 21.

[0075] In a preferred embodiment, since the temperature of the stator winding 32 is relatively high, the first sealing ring 21, the sealing strip 212 and the second sealing ring 22 will be partially in close contact with the stator winding 32, so the first sealing ring 21, the sealing strip 212 and the second sealing ring 22 can be made of polyphenylene sulfide or other plastic materials with high mechanical strength, high temperature resistance and good thermal stability.

[0076] In an optional embodiment, the first sealing ring 21 includes a first sub-ring 214 and a second sub-ring 215, the first sub-ring 214 and the second sub-ring 215 are spaced apart in the axial direction, a sealing member 23 is provided between the first sub-ring 214 and the second sub-ring 215, and the second sub-ring 215 is between the first sub-ring 214 and the plurality of sealing strips 212; the second sealing ring 22, the plurality of sealing strips 212 and the second sub-ring 215 are an integral part.

[0077] like Figure 1 As described above, the first sealing ring 21 includes a first sub-ring 214 and a second sub-ring 215 .

[0078] The first sub-ring 214 and the second sub-ring 215 are spaced apart in the axial direction, that is, the first sub-ring 214 and the second sub-ring 215 are spaced apart in the second direction. A sealing member 23 is disposed between the first sub-ring 214 and the second sub-ring 215, one end of the sealing member 23 is connected to the first sub-ring 214, and the other end of the sealing member 23 is connected to the second sub-ring 215, so that the first sub-ring 214 and the second sub-ring 215 are connected together and connected through the sealing member 23, so that the sealing effect between the first sub-ring 214 and the second sub-ring 215 can be improved.

[0079] To further illustrate, the second sealing ring 22, the plurality of sealing strips 212 and the second sub-ring 215 are an integral part and may be formed by injection molding.

[0080] In an optional embodiment, a first receiving groove 211 is formed at one end of the first sub-ring 214 close to the second sub-ring 215 , and a second receiving groove 221 is formed at one end of the second sub-ring 215 close to the first sub-ring 214 , and the sealing member 23 is accommodated in the first receiving groove 211 and the second receiving groove 221 .

[0081] like Figure 2 , Figure 8 , Fig. 9 , Fig.10 , Fig.12 and Fig.13 As shown, a first receiving groove 211 is provided on the end face of the first sub-ring 214 close to the second sub-ring 215; a second receiving groove 221 is provided on the end face of the second sub-ring 215 close to the first sub-ring 214; one end of the seal 23 is embedded in the first receiving groove 211, and the other end of the seal 23 is embedded in the second receiving groove 221. The seal 23 can improve the sealing performance of the connection between the first sub-ring 214 and the second sub-ring 215, thereby preventing the cooling oil from leaking out of the connection between the first sub-ring 214 and the second sub-ring 215.

[0082] In a preferred embodiment, the seal 23 is disposed between the first sub-ring 214 and the second sub-ring 215 , and the seal 23 may be made of polyphenylene sulfide or other plastic materials with high mechanical strength, high temperature resistance, and good thermal stability.

[0083] In an optional embodiment, one end of the first sealing ring 21 facing away from the multiple sealing strips 212 abuts against the inner wall of the shell 1, and the motor also includes a first sealing portion 8, which is arranged between the first sealing ring 21 and the inner wall of the shell 1; and / or, one end of the second sealing ring 22 facing away from the multiple sealing strips 212 abuts against the inner wall of the shell 1, and the motor also includes a second sealing portion 7, which is arranged between the second sealing ring 22 and the inner wall of the shell 1.

[0084] like Figure 2 As shown, the motor also includes a first sealing portion 8, which is arranged between the end of the first sealing ring 21 away from the sealing strip 212 and the inner wall of the housing 1, so as to improve the sealing performance of the connection between the first sealing ring 21 and the inner wall of the housing 1 and prevent cooling oil from leaking from the connection between the first sealing ring 21 and the inner wall of the housing 1.

[0085] like Figure 1 As shown, the motor also includes a second sealing portion 7, which is arranged between the end of the second sealing ring 22 away from the sealing strip 212 and the inner wall of the housing 1, so as to improve the sealing performance of the connection between the second sealing ring 22 and the inner wall of the housing 1 and prevent cooling oil from leaking from the connection between the second sealing ring 22 and the inner wall of the housing 1.

[0086] In one embodiment, the motor further includes a first sealing portion 8 .

[0087] In another embodiment, the motor further includes a second seal 7 .

[0088] In another embodiment, the motor cooling system further includes a first seal 8 and a second seal 7 .

[0089] In a preferred embodiment, the first sealing portion 8 and the second sealing portion 7 may be made of fluororubber or other plastic materials having the characteristics of high temperature resistance and large compression deformation.

[0090] In an optional embodiment, a first groove 111 and a second groove 121 are provided on the inner wall of the shell 1, and one end of the first sealing ring 21 away from the multiple sealing strips 212 is accommodated in the first groove 111, and one end of the second sealing ring 22 away from the multiple sealing strips 212 is accommodated in the second groove 121.

[0091] like Figure 1 and Figure 2 As shown, a first groove 121 is formed on the inner wall of the shell 1, and one end of the first sealing ring 21 away from the sealing strip 212 is accommodated in the first groove 111, that is, the end of the first sealing ring 21 away from the sealing strip 212 is located in the first groove 111, and the first groove 121 can provide support for the connection between the first sealing ring 21 and the shell 1; a second groove 121 is also provided on the inner wall of the shell 1, and the second groove 121 and the first groove 111 are arranged opposite to each other in the second direction, and one end of the second sealing ring 22 away from the sealing strip 212 is accommodated in the second groove 121, that is, the end of the second sealing ring 22 away from the sealing strip 212 is located in the second groove 121, and the second groove 121 can provide support for the connection between the second sealing ring 22 and the shell 1.

[0092] In the embodiment where the motor includes the first sealing part 8 and the second sealing part 7, one end of the first sealing part 8 is connected to the inner wall of the housing 1 in the first groove 121, and the other end of the first sealing part 8 is connected to the end of the first sealing ring 21 away from the sealing strip 212 in the first groove 121. The first groove 121 can provide support for the connection between the first sealing part 8 and the first sealing ring 21, thereby reducing the probability of fracture between the first sealing ring 21 and the first sealing part 8, and the first groove 121 can also provide positioning for the installation between the first sealing part 8 and the first sealing ring 21. One end of the second sealing part 7 is connected to the inner wall of the housing 1 in the second groove 111, and the other end of the second sealing part 7 is connected to the end of the second sealing ring 22 away from the sealing strip 212 in the second groove 111. The second groove 111 can provide support for the connection between the second sealing part 7 and the second sealing ring 22, thereby reducing the probability of fracture between the second sealing ring 22 and the second sealing part 7, and the second groove 111 can also provide positioning for the installation between the second sealing part 7 and the second sealing ring 22.

[0093] In one embodiment, two spaced-apart bosses are disposed on the inner wall of the housing 1 , and a first groove 121 is formed between the two bosses.

[0094] In one embodiment, two spaced-apart bosses are disposed on the inner wall of the housing 1 , and a second groove 111 is formed between the two bosses.

[0095] Specifically, the housing 1 includes an end cover 11 and an outer shell 12 , the first groove 121 is located on the inner wall of the outer shell 12 , and the first sealing ring 21 is connected to the outer shell 12 ; the second groove 111 is located on the end cover 11 , and the second sealing ring 22 is connected to the end cover 11 .

[0096] In an optional embodiment, the stator assembly 3 includes a stator core 31 and a stator winding 32, the stator winding 32 includes a first part 321 and a second part 322, the first part 321 protrudes from one axial end of the stator core 31, and the second part 322 protrudes from the other axial end of the stator core 31; the closed cavity 4 includes a first accommodating cavity 41 for accommodating the first part 321 and a second accommodating cavity 42 for accommodating the second part 322; the stator core 31 is provided with a cooling channel 315, and the cooling channel 315 connects the first accommodating cavity 41 and the second accommodating cavity 42.

[0097] like Figure 1 As shown, the stator assembly 3 includes a stator core 31 and a stator winding 32. The outer surface of the stator core 31 abuts against the inner wall of the housing 1. The closed cavity 4 is divided into a first accommodating cavity 41 and a second accommodating cavity 42 by the stator core 31 along the circumference of the housing 1. The stator winding 32 includes a first portion 321 and a second portion 322. The first portion 321 protrudes from one axial end of the stator core 31, and the second portion 322 protrudes from the other axial end of the stator core 31. Therefore, the first portion 321 is accommodated in the first accommodating cavity 41, and the second portion 322 is accommodated in the second accommodating cavity 42. A cooling channel 315 is provided on the stator core 31, and the cooling channel 315 communicates with the first accommodating cavity 41 and the second accommodating cavity 42.

[0098] To further illustrate, the cooling oil can flow from the first accommodating cavity 41 to the second accommodating cavity 42 through the cooling channel 315, and when passing through the cooling channel 315, the heat of the stator assembly 3 will be taken away, thereby cooling the stator assembly 3; the cooling oil can also flow from the second accommodating cavity 42 to the first accommodating cavity 41 through the cooling channel 315, and when passing through the cooling channel 315, the heat of the stator assembly 3 will be taken away, thereby cooling the stator assembly 3.

[0099] In an optional embodiment, the shell 1 is provided with an oil inlet 13 , which is communicated with the first accommodating cavity 41 , and the shell 1 is provided with an oil outlet 14 , which is communicated with the second accommodating cavity 42 .

[0100] like Figure 1 As shown, an oil inlet hole 13 and an oil outlet hole 14 are provided on the shell 1, the oil inlet hole 13 is connected to the first accommodating cavity 41, and the oil outlet hole 14 is connected to the second accommodating cavity 42; the cooling oil enters the first accommodating cavity 41 through the oil inlet hole 13, enters the second accommodating cavity 42 through the cooling channel 315, and finally flows out of the second accommodating cavity 42 through the oil outlet hole 14.

[0101] In a specific embodiment, the oil inlet hole 13 and the oil outlet hole 14 are respectively located on two sides of the diameter of the housing 1 in the first direction.

[0102] In another specific embodiment, in the second direction, the oil inlet hole 13 is close to the first end wall, and the oil outlet hole 14 is close to the second end wall.

[0103] In another specific embodiment, the oil inlet hole 13 and the oil outlet hole 14 are respectively located on opposite sides of the housing 1 in the first direction; in the second direction, the oil inlet hole 13 is close to the first end wall 15, and the oil outlet hole 14 is close to the second end wall 16. Further explanation: the oil inlet hole 13 and the oil outlet hole 14 are respectively located on both sides of the housing 1 in the first direction, and the oil inlet hole 13 and the oil outlet hole 14 are respectively located at both ends of the housing 1 in the second direction. The oil inlet hole 13 and the oil outlet hole 14 are both opened on the housing 1, so that the cooling oil has a longer flow path in the closed cavity 4, so as to improve the cooling effect on the stator assembly 3.

[0104] In an optional embodiment, the cooling channel 315 includes a plurality of first channels 3151 , which are arranged at intervals along the circumference of the stator core 31 , and the plurality of first channels 3151 are formed between the outer circumferential surface of the stator core 31 and the inner wall of the shell.

[0105] like Figure 5 As shown, the stator core 31 includes a first end face 313 and a second end face 314 , which are located on opposite sides of the stator core 31 in the axial direction. The first end face 313 is located in the first accommodating cavity 41 , and the second end face 314 is located in the second accommodating cavity 42 .

[0106] Further explanation, such as Figure 6 As shown, the cooling channel 315 includes a plurality of first channels 3151, and the plurality of first channels 3151 are arranged at intervals along the circumference of the stator core 31. The plurality of first channels 3151 can increase the oil flow area of ​​the cooling oil, so that the flow resistance of the cooling oil is smaller and the power required by the oil pump is also reduced.

[0107] Further, the first channel 3151 is located on the outer surface of the stator core 31 and penetrates the first end surface 313 and the second end surface 314. The first channel 3151 is located on the outer surface of the stator core 31 to achieve the effect of oil injection, so that the part of the stator assembly 3 located on the second end surface 314 can be cooled to improve the cooling effect.

[0108] To further illustrate, the size and shape of the first channel 3151 can be adjusted according to the heat dissipation requirements and other performance requirements of different motors.

[0109] In an optional implementation, the cooling channel 315 includes a plurality of second channels 3152 , the plurality of second channels 3152 are arranged at intervals along the circumference of the stator core 31 , and the plurality of second channels 3152 are arranged inside the stator core 31 .

[0110] It is further explained that the cooling channel 315 includes a plurality of second channels 3152, and the plurality of second channels 3152 are arranged at intervals along the circumference of the stator core 31. The plurality of second channels 3152 can further increase the oil flow area of ​​the cooling oil and further reduce the flow resistance of the cooling oil.

[0111] To further illustrate, the second channel 3152 passes through the first end face 313 and the second end face 314, and the second channel 3152 is closer to the central axis of the stator core 31 relative to the first channel 3151. The stator winding 32 is embedded in the tooth slot 312 of the stator core 31, so the second channel 3152 is closer to the stator winding 32 relative to the first channel 3151, thereby improving the cooling effect on the stator winding 32.

[0112] The central axis of the stator core 31 is a line connecting the center of the first end surface 313 and the center of the second end surface 314 in the axial direction of the stator core 31 .

[0113] To further illustrate, a plurality of first channels 3151 and a plurality of second channels 3152 are provided on the stator core 31 , which can improve the cooling effect and cooling uniformity of the stator assembly 3 .

[0114] To further illustrate, the size and shape of the second channel 3152 can be adjusted according to the heat dissipation requirements and other performance requirements of different motors.

[0115] like Figure 1 As shown, the motor further includes a rotor assembly 6, which is arranged inside the oil-free cavity 5, and an air gap is formed between the rotor assembly 6 and the stator assembly 3, and the sealing assembly 2 is located in the air gap. This can prevent the cooling oil from entering the air gap between the stator assembly 3 and the rotor assembly 6, and further prevent the cooling oil from increasing the drag torque of the rotor assembly 6, thereby preventing the output power of the motor from being affected.

[0116] According to a second aspect of an embodiment of the present application, a power assembly is provided, comprising the above-mentioned motor.

[0117] According to a third aspect of an embodiment of the present application, a vehicle is provided, comprising the above-mentioned motor; or the above-mentioned powertrain.

[0118] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A motor, characterized in that: include: case; A sealing assembly, wherein the sealing assembly is disposed inside the housing and forms an annular closed cavity with the inner wall of the housing; A stator assembly is located in the closed cavity.

2. The motor according to claim 1, characterized in that The stator assembly comprises a stator core and a stator winding, wherein the stator core is provided with a plurality of tooth slots penetrating in the axial direction, and an inner wall of the stator core is provided with slots respectively connected with the plurality of tooth slots, and the stator winding is at least partially arranged inside the tooth slots; The sealing assembly comprises a plurality of sealing strips, and the plurality of sealing strips are embedded in the grooves in a one-to-one correspondence.

3. The motor according to claim 2, characterized in that The sealing assembly further comprises a first sealing ring and a second sealing ring which are spaced apart in the axial direction, one end of the plurality of sealing strips is connected to the first sealing ring, and the other end of the plurality of sealing strips is connected to the second sealing ring; The closed cavity is surrounded by the first sealing ring, the second sealing ring, a plurality of sealing strips and an inner wall of the housing.

4. The motor according to claim 3, characterized in that The first sealing ring comprises a first sub-ring and a second sub-ring, the first sub-ring and the second sub-ring are spaced apart in the axial direction, a sealing member is provided between the first sub-ring and the second sub-ring, and the second sub-ring is between the first sub-ring and the plurality of sealing strips; The second sealing ring, the plurality of sealing strips and the second sub-ring are an integrated piece.

5. The motor according to claim 4, characterized in that A first receiving groove is formed at one end of the first sub-ring close to the second sub-ring, and a second receiving groove is formed at one end of the second sub-ring close to the first sub-ring. The sealing member is accommodated in the first receiving groove and the second receiving groove.

6. The motor according to claim 3, characterized in that One end of the first sealing ring facing away from the plurality of sealing strips abuts against the inner wall of the housing, and the motor further comprises a first sealing portion, which is arranged between the first sealing ring and the inner wall of the housing; and / or, One end of the second sealing ring facing away from the plurality of sealing strips abuts against the inner wall of the housing. The motor further comprises a second sealing portion, which is arranged between the second sealing ring and the inner wall of the housing.

7. The motor according to claim 3, characterized in that A first groove and a second groove are provided on the inner wall of the shell, one end of the first sealing ring away from the plurality of sealing strips is received in the first groove, and one end of the second sealing ring away from the plurality of sealing strips is received in the second groove.

8. The motor according to claim 1, characterized in that The stator assembly includes a stator core and a stator winding, wherein the stator winding includes a first part and a second part, wherein the first part protrudes from one axial end of the stator core, and the second part protrudes from the other axial end of the stator core; The closed cavity comprises a first accommodating cavity for accommodating the first part and a second accommodating cavity for accommodating the second part; The stator core is provided with a cooling channel, and the cooling channel communicates with the first accommodating cavity and the second accommodating cavity.

9. The motor according to claim 8, characterized in that The shell is provided with an oil inlet hole, which is communicated with the first accommodating cavity. The shell is provided with an oil outlet hole, which is communicated with the second accommodating cavity.

10. The motor according to claim 8, characterized in that The cooling channel includes a plurality of first channels, the plurality of first channels are arranged at intervals along the circumferential direction of the stator core, and the plurality of first channels are formed between the outer circumferential surface of the stator core and the inner wall of the housing.

11. The motor according to claim 8, characterized in that The cooling channel includes a plurality of second channels, the plurality of second channels are arranged at intervals along the circumferential direction of the stator core, and the plurality of second channels are arranged inside the stator core.

12. A powertrain, characterized in that: Comprising a motor as claimed in any one of claims 1 to 11.

13. A vehicle, characterized in that: include: The motor according to any one of claims 1 to 11; or The powertrain as claimed in claim 12.

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