Motor assembly and vehicle

Abstract

The utility model relates to the technical field of motors, and particularly discloses a motor assembly and a vehicle, and the motor assembly comprises a housing assembly, a stator assembly and an oil injection ring. The shell assembly comprises an outer shell and a heat dissipation sleeve, and the outer shell is arranged on the periphery of the heat dissipation sleeve in a sleeving mode. The stator assembly is connected with the heat dissipation sleeve and located on the inner periphery of the heat dissipation sleeve. The stator assembly comprises an iron core and a winding connected with the iron core. The oil injection ring is connected with the heat dissipation sleeve, the periphery of the winding is sleeved with the oil injection ring, and a plurality of oil injection holes are formed in the oil injection ring towards the winding; specifically, a first cooling channel is formed between the shell and the heat dissipation sleeve, and a second cooling channel is formed among the iron core, the heat dissipation sleeve and the oil injection ring. According to the motor assembly, the cooling channels are arranged between the shell and the heat dissipation sleeve and between the heat dissipation sleeve and the iron core for heat dissipation and cooling, and the heat dissipation performance and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a motor assembly and vehicle. BACKGROUND

[0002] With the development of vehicle technology, the motor assembly is more and more demanded to high torque density, high power density and high speed, and the performance of motor is also improved. With the performance improvement of motor, the heat dissipation requirement of motor is also higher and higher.

[0003] However, the motor assembly used in the current vehicle mostly has problems such as single heat dissipation mode and low heat dissipation performance. SUMMARY

[0004] The application provides a motor assembly and vehicle, which can improve the heat dissipation performance and reliability.

[0005] To solve the above technical problems, one technical scheme of the application is to provide a motor assembly, which comprises a shell assembly, a stator assembly and an oil injection ring; the shell assembly comprises an outer shell and a heat dissipation sleeve, and the outer shell is sleeved on the outer periphery of the heat dissipation sleeve; the stator assembly is connected with the heat dissipation sleeve and located at the inner periphery of the heat dissipation sleeve, and the stator assembly comprises an iron core and a winding connected with the iron core; the oil injection ring is connected with the heat dissipation sleeve, and the oil injection ring is sleeved on the outer periphery of the winding, and the oil injection ring is provided with a plurality of oil injection holes facing the winding; wherein, the first cooling channel is formed between the outer shell and the heat dissipation sleeve, and the second cooling channel is formed between the iron core and the heat dissipation sleeve and the oil injection ring.

[0006] The outer shell comprises a first end and a second end arranged oppositely, and the inner peripheral surface of the heat dissipation sleeve is provided with a plurality of first guide elements and a plurality of second guide elements, the first guide elements and the second guide elements are connected with the first end and the second end respectively, and the plurality of first guide elements and the plurality of second guide elements are staggered along the circumferential direction of the stator assembly; the outer peripheral surface of the heat dissipation sleeve is provided with a plurality of first protrusions spaced along the circumferential direction of the stator assembly; wherein, each first protrusion is inserted between the corresponding first guide element and the second guide element and forms the first cooling channel together with the first guide element and the second guide element, and the first cooling channel is a serpentine channel.

[0007] The outer shell is provided with a water inlet and a water outlet communicating with the first cooling channel, and along the axial direction of the stator assembly, the length of at least one first guide element or the length of at least one second guide element is equal to the size of the inner peripheral surface of the outer shell, and the water inlet and the water outlet are on the two sides of the same first guide element or the same second guide element.

[0008] The inner circumferential surface of the heat dissipation sleeve facing the stator assembly is provided with a plurality of second protrusions arranged along the circumferential direction of the stator assembly, and the plurality of first protrusions and the plurality of second protrusions are alternately arranged along the circumferential direction; along the axial direction of the stator assembly, the middle part of the iron core forms an oil ring groove; the second protrusions abut against the outer surfaces of the two ends of the iron core along the axial direction and together with the oil ring groove and the oil injection ring form a second cooling channel.

[0009] The oil injection ring comprises a main body part and a ring part, the outer circumferential surface of the ring part is connected with the inner circumferential surface of the heat dissipation sleeve, the main body part is located on the side of the ring part facing the stator assembly, and the oil injection holes penetrate through the main body part along the radial direction of the stator assembly; the outer circumferential surface of the main body part and the inner circumferential surface of the heat dissipation sleeve have a cooling gap therebetween, and the cooling gap is communicated with the oil injection holes.

[0010] The outer circumferential surface of the ring part is provided with a second sealing groove; the motor assembly further comprises a second sealing member, and the second sealing member is installed in the second sealing groove.

[0011] The outer circumferential surface of the ring part is provided with a second sealing groove; the motor assembly further comprises a second sealing member, and the second sealing member is installed in the second sealing groove.

[0012] The shell assembly further comprises an end ring, and along the axial direction of the stator assembly, the opposite ends of the shell and the heat dissipation sleeve form clamping grooves, and the end ring is clamped in the clamping grooves.

[0013] The shell is provided with an oil inlet, and the oil inlet is communicated with the second cooling channel.

[0014] The application also comprises a second technical scheme, and provides a vehicle comprising the motor assembly.

[0015] The motor assembly provided by the application comprises a shell assembly, a stator assembly and an oil injection ring; the shell assembly comprises a shell and a heat dissipation sleeve, and the shell is sleeved on the outer periphery of the heat dissipation sleeve; the stator assembly is connected with the heat dissipation sleeve and located on the inner periphery of the heat dissipation sleeve, and the stator assembly comprises an iron core and a winding connected with the iron core; the oil injection ring is connected with the heat dissipation sleeve, and the oil injection ring is sleeved on the outer periphery of the winding and is provided with a plurality of oil injection holes facing the winding; specifically, a first cooling channel is formed between the shell and the heat dissipation sleeve, and a second cooling channel is formed between the iron core and the heat dissipation sleeve and the oil injection ring. The motor assembly of the application can dissipate heat through the cooling channels arranged between the shell and the heat dissipation sleeve and between the heat dissipation sleeve and the iron core, thereby improving the heat dissipation performance and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the motor assembly of this application. The motor assembly includes a housing assembly, a stator assembly, and an oil injection ring. The housing assembly includes a housing, a heat sink, and an end ring. The stator assembly includes an iron core and windings. A first cooling channel is formed between the housing and the heat sink. A second cooling channel is formed between the iron core, the heat sink, and the oil injection ring. The housing is provided with a water inlet, a water outlet, and an oil inlet.

[0018] Figure 2 yes Figure 1 A schematic diagram of the assembly of the inner and outer shell, heat sink, and iron core;

[0019] Figure 3 yes Figure 1 A schematic diagram of a proposed embodiment of the central injection ring;

[0020] Figure 4 yes Figure 1 A schematic diagram of the structure of one embodiment of the first cooling channel;

[0021] Figure 5 yes Figure 1 A schematic diagram of the structure of one embodiment of the second cooling channel;

[0022] Figure 6 yes Figure 1 A schematic diagram of the structure of one embodiment of the inner shell;

[0023] Figure 7 yes Figure 1 A schematic diagram of one embodiment of the heat dissipation sleeve;

[0024] Figure 8 yes Figure 1 A schematic diagram of the structure of the inner and outer shell, as well as the water inlet, water outlet and oil inlet of one embodiment;

[0025] Figure 9 yes Figure 1 A schematic diagram of the structure of an embodiment of the middle stator assembly;

[0026] Figure 10 yes Figure 1 A schematic diagram of the assembly of the inner and outer shell, heat sink, and end ring;

[0027] Figure 11 yes Figure 1Structure schematic diagram of assembled middle shell, heat sink and end ring;

[0028] Figure 12 is Figure 1 Structure schematic diagram of corresponding cooperation between first cooling channel and branch of second cooling channel.

[0029] Reference signs: 1, shell assembly; 11, outer shell; 111, first end; 112, second end; 113, first guide; 114, second guide; 115, water inlet; 116, water outlet; 117, oil inlet; 12, heat sink; 121, first protrusion; 122, second protrusion; 13, end ring; 14, clamping groove; 2, stator assembly; 21, iron core; 211, oil ring groove; 212, outer surface; 22, winding; 3, oil injection ring; 31, oil injection hole; 32, main body part; 321, first sealing groove; 33, ring part; 331, second sealing groove; 4, first cooling channel; 5, second cooling channel; 51, first sub-channel; 52, second sub-channel; 53, cooling gap; 6, first sealing member; 7, second sealing member; 100, motor assembly. DETAILED DESCRIPTION

[0030] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings, but not all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0031] In this paper, the "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the present application, the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected, or can be in communication with each other; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Please refer to Figures 1 to 3 , Figure 1 is a structural schematic diagram of an embodiment of the motor assembly provided by the present application, Figure 2 is Figure 1 a structural schematic diagram of the assembly of the shell and the heat sink and the core, Figure 3 is Figure 1 a structural schematic diagram of an embodiment of the oil injection ring. One aspect of the present application provides a motor assembly 100, which comprises a shell assembly 1, a stator assembly 2 and an oil injection ring 3; the shell assembly 1 comprises a shell 11 and a heat sink 12, the shell 11 is sleeved on the outer periphery of the heat sink 12; the stator assembly 2 is connected with the heat sink 12 and located at the inner periphery of the heat sink 12, the stator assembly 2 comprises a core 21 and a winding 22 connected with the core 21; the oil injection ring 3 is connected with the heat sink 12, and the oil injection ring 3 is sleeved on the outer periphery of the winding 22, the oil injection ring 3 is provided with a plurality of oil injection holes 31 facing the winding 22; specifically, a first cooling channel 4 is formed between the shell 11 and the heat sink 12, and a second cooling channel 5 is formed between the core 21 and the heat sink 12 and the oil injection ring 3. The motor assembly 100 of the present application can be cooled by the first cooling channel 4 and the second cooling channel 5, which improves the heat dissipation performance and reliability.

[0035] Specifically, the first cooling channel 4 is formed on the outer periphery of the stator assembly 2, indirectly contacts the stator assembly 2 through the heat sink 12, and can cool the whole stator assembly 2. The heat sink 12 can be made of a heat-conducting material to facilitate heat transfer of the stator assembly 2 and improve heat dissipation efficiency. The inside of the first cooling channel 4 can be filled with water or other cooling liquid to cool the stator assembly 2 and improve versatility. The second cooling channel 5 is formed on the outer periphery of the stator assembly 2 and directly contacts the stator assembly 2. In some embodiments, cooling oil can be filled therein, and the core 21 and the winding 22 are cooled by the flow of the cooling oil, respectively, to improve heat dissipation performance. The second cooling channel 5 can include a first sub-channel 51 and a second sub-channel 52. The first sub-channel 51 is formed by the heat sink 12 and the core 21, and the second sub-channel 52 is formed by the heat sink 12 and the oil injection ring 3. The first sub-channel 51 and the second sub-channel 52 are in communication, and the second sub-channel 52 is in communication with the oil injection hole 31. Thus, the cooling oil can first pass through the first sub-channel 51 to cool the core 21, and then pass through the second sub-channel 52 and the oil injection hole 31 to cool the winding 22. It should be noted that the oil injection hole 31 is arranged around the winding 22 to improve the heat dissipation capacity of the winding 22. The specific number of the oil injection hole 31 is not limited and can be adjusted according to actual conditions.

[0036] In use, the cooling liquid can flow in the first cooling channel 4 to cool the whole outer periphery of the stator assembly 2, and the cooling oil can flow in the second cooling channel 5 to cool the surfaces of the core 21 and the winding 22. Through the mixed cooling of the two flow channels, the heat dissipation performance of the motor assembly 100 can be improved, and the reliability of the motor assembly 100 can be improved.

[0037] In an embodiment of the present application, please continue to combine Figure 4 , Figure 6 and Figure 7 , Figure 4 is Figure 1 the structural schematic view of the first cooling channel in an embodiment of Figure 6 is Figure 1 the structural schematic view of the housing in an embodiment of Figure 7 is Figure 1Structure diagram of one embodiment of the heat dissipation sleeve. The shell 11 includes a first end 111 and a second end 112 arranged oppositely, and is provided with a plurality of first guide members 113 and a plurality of second guide members 114 towards the inner circumferential surface of the heat dissipation sleeve 12, the first guide members 113 and the second guide members 114 are connected to the first end 111 and the second end 112 respectively, and the plurality of first guide members 113 and the plurality of second guide members 114 are staggered along the circumference of the stator assembly 2; the heat dissipation sleeve 12 is provided with a plurality of first protrusions 121 along the circumference of the stator assembly 2 and arranged at intervals. Specifically, when the shell 11 is sleeved on the outer circumference of the heat dissipation sleeve 12, each first protrusion 121 is inserted between the corresponding first guide member 113 and the second guide member 114 and enclosed by the first guide member 113 and the second guide member 114 to form a first cooling channel 4, and the first cooling channel 4 is a serpentine channel.

[0038] The first protrusion 121 protrudes towards the shell 11 so as to be inserted between the first guide member 113 and the second guide member 114. After the cooling liquid is introduced, the cooling liquid can flow back and forth between the first end 111 and the second end 112 due to the guidance of the first guide member 113, the second guide member 114 and the first protrusion 121, thereby forming a serpentine or S-shaped first cooling channel 4. One end of the first guide member 113 is connected to the first end 111, and the other end extends to the second end 112 with a gap therebetween for the flow of the cooling liquid. Similarly, one end of the second guide member 114 is connected to the second end 112, and the other end extends to the first end 111 with a gap therebetween. The first protrusion 121 can fill the space between the first guide member 113 and the second guide member 114, reduce the inner diameter of the first cooling channel 4, thereby increasing the flow rate of the cooling liquid and improving the heat dissipation efficiency. The first guide member 113 and the second guide member 114 can abut against the outer circumferential surface of the heat dissipation sleeve 12 to form a serpentine channel. The first protrusion 121 can abut against the inner circumferential surface of the shell 11 to increase the number of branches of the serpentine channel, or can be separated from the inner circumferential surface of the shell 11 to reduce the inner diameter of the serpentine channel.

[0039] In one embodiment, the first guide member 113, the second guide member 114 and the first protrusion 121 can be rectangular for ease of production and processing. In another embodiment, the first guide member 113, the second guide member 114 and the first protrusion 121 can also be other special-shaped structures such as trapezoidal, triangular, etc. according to process requirements and actual conditions. Of course, the shapes of the first guide member 113, the second guide member 114 and the first protrusion 121 can be different, and the number of the first guide member 113 and the second guide member 114 is not limited and can be adjusted according to actual needs.

[0040] In one embodiment of the present application, please continue to combine Figure 8 , Figure 8 isFigure 1 Figure 3 is a schematic view of the structure of the housing and the water inlet, water outlet and oil inlet in one embodiment. The housing 11 is provided with a water inlet 115 and a water outlet 116 which communicate with the first cooling channel 4. The length of at least one first guide 113 or the length of at least one second guide 114 is equal to the size of the inner circumferential surface of the housing 11, and the water inlet 115 and the water outlet 116 are located on the two sides of the same first guide 113 or the same second guide 114.

[0041] Specifically, the water inlet 115 and the water outlet 116 both penetrate the outer circumferential surface and the inner circumferential surface of the housing 11 so as to communicate with the first cooling channel 4. The length of one of the first guides 113 is equal to the size of the inner circumferential surface of the housing 11, so that the first cooling channel 4 is a one-way channel which is connected at one end in one direction. The water inlet 115 and the water outlet 116 are located on the two sides of the first guide 113, so that the cooling liquid enters the first cooling channel 4 through the water inlet 115, circulates around the stator assembly 2 and then flows out of the water outlet 116. The above structure can form a one-way flow channel, and the cooling liquid can continuously flow to cool the stator assembly 2, thereby increasing the heat dissipation efficiency and the heat dissipation area between the cooling liquid and the stator assembly 2, and further improving the heat dissipation performance. Of course, the same effect can also be achieved by one of the second guides 114 which is equal to the size of the inner circumferential surface of the housing 11.

[0042] Of course, in another embodiment, the length of two or more first guides 113 or second guides 114 can be equal to the size of the inner circumferential surface of the housing 11. In this case, the first cooling channel 4 can be divided into several parts which surround the outer circumferential surface of the stator assembly 2. Therefore, the number of the water inlets 115 and the water outlets 116 needs to be increased to form a one-way flow channel for each part so that the cooling liquid can continuously flow.

[0043] In one embodiment of the present application, please continue to combine Figure 5 and Figure 9 , Figure 5 is Figure 1 a schematic view of the structure of the second cooling channel in one embodiment, Figure 9 is Figure 1 a schematic view of the structure of the stator assembly in one embodiment. The heat sink 12 is provided with a plurality of second protrusions 122 which are arranged along the circumferential direction of the stator assembly 2 and are spaced apart from each other. The first protrusions 121 and the second protrusions 122 are alternately arranged along the circumferential direction. The middle part of the core 21 forms an oil ring groove 211 along the axial direction of the stator assembly 2. The second protrusions 122 abut against the outer surfaces 212 of the two ends of the core 21 along the axial direction and together with the oil ring groove 211 and the oil injection ring 3 form the second cooling channel 5.

[0044] Specifically, the second protrusions 122 protrude towards the iron core 21 so as to abut against the iron core 21. The gap between two adjacent second protrusions 122 and the outer surface 212 of the iron core 21, the oil ring groove 211 and the oil injection ring 3 form the second cooling channel 5. By alternately arranging the first protrusions 121 and the second protrusions 122, the branches of the second cooling channel 5 can be arranged in one-to-one correspondence with the branches of the first cooling channel 4, and cross-distributed, so as to reduce the heat dissipation path, improve the efficiency of heat propagation, and improve the heat dissipation performance. It should be noted that the number and shape of the second protrusions 122 are not limited, and the second protrusions 122 can be rectangular, trapezoidal or other special-shaped structures. It should be noted that the branch of the second cooling channel 5 described above is also the second sub-channel 52.

[0045] In an embodiment of the present application, in combination with Figure 1 、 Figure 3 and Figure 5 It is shown that the oil injection ring 3 includes a main body part 32 and a ring part 33, the outer periphery of the ring part 33 is connected with the inner periphery of the heat sink 12, the main body part 32 is located on the side of the ring part 33 facing the stator assembly 2, and the oil injection hole 31 penetrates the main body part 32 along the radial direction of the stator assembly 2; the outer periphery of the main body part 32 and the inner periphery of the heat sink 12 have a cooling gap 53, and the cooling gap 53 is communicated with the oil injection hole 31.

[0046] Specifically, along the radial direction of the stator assembly 2, the diameter of the main body part 32 is smaller than the diameter of the ring part 33, so that when the outer periphery of the ring part 33 abuts against the inner periphery of the heat sink 12, there is a gap between the main body part 32 and the heat sink 12, so that the outer periphery of the main body part 32 can form a cooling gap 53 with the inner periphery of the heat sink 12. The oil injection hole 31 penetrates the outer periphery and the inner periphery of the main body part 32, so that the cooling gap 53 can be communicated with the oil injection hole 31. After the cooling oil enters the second cooling channel 5, part of it can flow along the oil ring groove 211, and the other part can flow along the second protrusions 122, and finally flow into the cooling gap 53 and be sprayed to the winding 22 through the oil injection hole 31.

[0047] Further, the main body part 32 is provided with a first sealing groove 321 at one end facing the iron core 21; the motor assembly 100 further includes a first sealing member 6, and the first sealing member 6 is installed in the first sealing groove 321.

[0048] In order to improve or avoid the leakage of the cooling oil in the cooling gap 53 from both sides of the iron core 21, the main body part 32 abuts against the iron core 21 along the axial direction of the stator assembly 2, so as to improve the sealing performance. The first sealing groove 321 and the first sealing member 6 can further improve the sealing performance between the main body part 32 and the iron core 21, so that the cooling oil can flow smoothly from the iron core 21 into the cooling gap 53.

[0049] Further, in order to improve or avoid the leakage of the cooling oil from the gap between the ring part 33 and the heat sink 12, the outer circumferential surface of the ring part 33 is provided with a second sealing groove 331; the motor assembly 100 further comprises a second sealing member 7 installed in the second sealing groove 331. Through the second sealing groove 331 and the second sealing member 7, the sealing performance between the ring part 33 and the heat sink 12 can be improved, and the leakage of the cooling oil can be reduced or avoided.

[0050] In an embodiment of the present application, please continue to refer to Figure 10 and Figure 11 , Figure 10 is Figure 1 the structure diagram when the shell, the heat sink and the end ring in Figure 11 are assembled, Figure 1 is the structure diagram after the shell, the heat sink and the end ring in are assembled. In order to improve the stability of the connection between the heat sink 12 and the shell 11, the shell assembly 1 further comprises an end ring 13, and the opposite ends of the shell 11 and the heat sink 12 are formed with clamping grooves 14 along the axial direction of the stator assembly 2, and the end ring 13 is clamped in the clamping grooves 14.

[0051] Specifically, the shell 11 is provided with a groove facing the heat sink 12, and the heat sink 12 is also provided with a groove facing the shell 11, and the two grooves correspondingly form the clamping grooves 14, and the end ring 13 can be clamped in the clamping grooves 14 by friction stir welding or the like, so that the heat sink 12, the end ring 13 and the shell 11 can form an integral whole, improving the stability and firmness.

[0052] Figure 5 In an embodiment of the present application, in combination with Figure 8 and , the shell 11 is provided with an oil inlet 117, and the oil inlet 117 is in communication with the second cooling channel 5.

[0053] Specifically, the cooling oil enters the second cooling channel 5 through the oil inlet 117, is sprayed out from the oil injection hole 31 after absorbing the heat of the iron core 21, and then cools the winding 22. Thus, a one-way cooling oil channel is formed, so that the cooling oil can continuously flow, improving the heat dissipation performance.

[0054] Figure 12 Please continue to refer to Figure 12 , Figure 1 is the structure diagram of the branch of the first cooling channel and the branch of the second cooling channel in . The motor assembly 100 of the embodiment of the present application can improve the heat dissipation performance and improve the reliability by mixing heat dissipation through the two flow channels of the first cooling channel 4 and the second cooling channel 5. Since the branch of the first cooling channel 4 and the branch of the second cooling channel 5 correspond to each other and are distributed in cross, a part of the heat absorbed by the cooling oil can be directly absorbed and taken away by the cooling liquid, shortening the heat dissipation path and further improving the heat dissipation efficiency.

[0055] Another aspect of the present application provides a vehicle comprising the motor assembly 100 described above. Specifically, since the vehicle comprises the motor assembly 100 described in the above embodiments, it also has the beneficial effects of the motor assembly 100 described above, which will not be repeated here.

[0056] It should be noted that the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined; the terms "parallel", "perpendicular", and the like also do not mean that the fittings must be absolutely parallel or perpendicular, but can form a certain angular deviation. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In addition, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed during use, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0057] It can be understood that the meaning of "multiple" herein is at least two, such as two, three, etc., unless specifically limited. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally also include steps or units not listed, or can optionally also include other steps or units inherent to the process, method, product, or device. And the term "and / or", is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0058] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A motor assembly, characterized in that, include: The housing assembly (1) includes an outer shell (11) and a heat sink (12), wherein the outer shell (11) is fitted around the outer periphery of the heat sink (12); Stator assembly (2), the stator assembly (2) is connected to the heat sink (12) and located on the inner periphery of the heat sink (12), the stator assembly (2) includes an iron core (21) and a winding (22) connected to the iron core (21); An oil injection ring (3) is connected to the heat dissipation sleeve (12) and is sleeved on the outer periphery of the winding (22). The oil injection ring (3) has a plurality of oil injection holes (31) facing the winding (22); wherein, A first cooling channel (4) is formed between the outer shell (11) and the heat dissipation sleeve (12), and a second cooling channel (5) is formed between the iron core (21), the heat dissipation sleeve (12), and the oil injection ring (3).

2. The motor assembly according to claim 1, characterized in that, The outer casing (11) includes a first end (111) and a second end (112) disposed opposite to each other. The outer casing (11) has a plurality of first guide members (113) and a plurality of second guide members (114) on its inner circumferential surface facing the heat sink (12). The first guide members (113) and the second guide members (114) are respectively connected to the first end (111) and the second end (112), and the plurality of first guide members (113) and the plurality of second guide members (114) are arranged alternately along the circumference of the stator assembly (2). The heat sink (12) has a plurality of first protrusions (121) arranged at circumferential intervals along the stator assembly (2) on its outer peripheral surface facing the outer casing (11); wherein, Each of the first protrusions (121) is inserted between the corresponding first guide (113) and second guide (114) and surrounds the first guide (113) and the second guide (114) to form the first cooling channel (4), which is a serpentine channel.

3. The motor assembly according to claim 2, characterized in that, The housing (11) is provided with an inlet (115) and an outlet (116) communicating with the first cooling channel (4). Along the axial direction of the stator assembly (2), the length of at least one of the first guide members (113) or the length of the second guide member (114) is equal to the size of the inner circumferential surface of the housing (11), and the inlet (115) and the outlet (116) are on both sides of the same first guide member (113) or the same second guide member (114).

4. The motor assembly according to claim 2, characterized in that, The heat sink (12) has a plurality of second protrusions (122) arranged at intervals along the circumferential direction of the stator assembly (2) on the inner circumferential surface facing the stator assembly (2), and a plurality of first protrusions (121) and a plurality of second protrusions (122) are arranged alternately along the circumferential direction. Along the axial direction of the stator assembly (2), an oil ring groove (211) is formed in the middle of the iron core (21); The second protrusion (122) abuts against the outer surface (212) of both ends of the iron core (21) along the axial direction and together with the oil ring groove (211) and the oil spray ring (3) to form the second cooling channel (5).

5. The motor assembly according to claim 4, characterized in that, The oil injection ring (3) includes a main body (32) and an ring (33). The outer peripheral surface of the ring (33) is connected to the inner peripheral surface of the heat sink (12). The main body (32) is located on the side of the ring (33) facing the stator assembly (2). The oil injection hole (31) passes through the main body (32) along the radial direction of the stator assembly (2). There is a cooling gap (53) between the outer peripheral surface of the main body (32) and the inner peripheral surface of the heat dissipation sleeve (12), and the cooling gap (53) is connected to the oil injection hole (31).

6. The motor assembly according to claim 5, characterized in that, The main body (32) has a first sealing groove (321) at one end facing the iron core (21); The motor assembly also includes a first seal (6), which is installed in the first sealing groove (321).

7. The motor assembly according to claim 5, characterized in that, The outer circumferential surface of the ring (33) is provided with a second sealing groove (331); The motor assembly also includes a second seal (7), which is installed in the second sealing groove (331).

8. The motor assembly according to claim 1, characterized in that, The housing assembly (1) further includes an end ring (13). Along the axial direction of the stator assembly (2), the outer shell (11) and the heat sink sleeve (12) have snap-fit ​​grooves (14) formed at opposite ends, and the end ring (13) is snapped into the snap-fit ​​grooves (14).

9. The motor assembly according to claim 1, characterized in that, The outer casing (11) is provided with an oil inlet (117), which is connected to the second cooling channel (5).

10. A vehicle, characterized in that, include: The motor assembly according to any one of claims 1-9.

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