Motor, electric assembly and vehicle

Abstract

The invention discloses a motor, an electric assembly and a vehicle. The motor comprises a stator and a cover body. The stator comprises a winding. The cover body and the stator are adjacent and relatively fixed, the cover body is arranged corresponding to the winding, and the cover body partially surrounds the end part of the winding; wherein a first cooling channel is arranged in the cover body, cooling oil can circulate in the first cooling channel, and the cooling oil is sprayed to the winding from the first cooling channel. The cooling oil spraying mechanism is arranged at the end part of the stator winding, so that the cooling efficiency is remarkably improved, the service life of the motor is prolonged, and the motor is easy to assemble, relatively low in cost and high in reliability.

Description

Technical Field

[0001] The present invention generally relates to the technical field of motor cooling, and more particularly to a motor, an electric assembly and a vehicle. Background Art

[0002] As the energy crisis and environmental pollution problems continue to intensify, the development of pure electric vehicles has attracted widespread attention from countries around the world. The powertrain in electric vehicles usually includes: motors, reducers, differentials and other mechanisms. At present, permanent magnet motors are usually used for motors, which have the characteristics of high efficiency, high power density, and high speed. However, the motors also heat up quickly when working, so a more efficient cooling system is urgently needed to take away the heat generated by the motors in time. Otherwise, it is easy to cause the motor temperature to rise too high, reduce the motor performance, and even cause winding burning, magnetic steel demagnetization, bearing damage and other consequences, seriously affecting the service life of the motor.

[0003] Therefore, it is necessary to provide an electric machine, an electric assembly and a vehicle to at least partially solve the above problems. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, a first aspect of the present invention provides a motor, comprising:

[0006] a stator, the stator comprising windings;

[0007] A cover body, the cover body is adjacent to the stator and relatively fixed, the cover body is arranged corresponding to the winding, and the cover body at least partially surrounds the end of the winding;

[0008] A first cooling channel is provided inside the cover body, and cooling oil can flow through the first cooling channel, and cooling oil is sprayed toward the winding from the first cooling channel.

[0009] Optionally, the stator further comprises:

[0010] The stator core is provided with a second cooling channel, the second cooling channel can flow cooling oil, and the cooling oil flows from the second cooling channel to the first cooling channel.

[0011] Optionally, the motor further comprises:

[0012] A casing body, wherein the casing body, the axial end surface of the stator core and the outer circumferential surface of the cover body are combined to form a transition cavity, and the first cooling channel and the second cooling channel are connected through the transition cavity.

[0013] Optionally, the outer circumferential surface of the cover body is provided with a radially protruding flange, the flange is in contact with the casing body, the entrance of the first cooling channel is located between the flange and the stator core, and the flange is used to block the cooling oil so that the cooling oil flows into the entrance of the first cooling channel.

[0014] Optionally, the second cooling channel comprises:

[0015] A cooling ring groove, wherein the cooling ring groove is arranged on the outer circumference of the stator core;

[0016] A yoke oil hole is provided on the stator core along the axial direction of the motor, an inlet end of the yoke oil hole is communicated with the cooling ring groove, and an outlet end of the yoke oil hole is communicated with the transition cavity.

[0017] Optionally, the second cooling channel further includes:

[0018] The tooth bottom oil hole is arranged on the stator core along the axial direction of the motor, the inlet end of the tooth bottom oil hole is connected to the cooling ring groove, and the outlet end of the tooth bottom oil hole corresponds to the end of the winding.

[0019] Optionally, the stator core comprises:

[0020] A plurality of groups of stator laminations, wherein the outer diameter of the stator laminations located in the middle of the stator core is smaller than the outer diameter of the stator laminations on both sides, thereby forming the cooling ring groove in the middle of the stator core.

[0021] Optionally, the cover body is arranged at an axial end of the stator, and the cover body comprises:

[0022] An outer peripheral portion, the outer peripheral portion is arranged corresponding to the outer periphery of the end of the winding, and one end of the outer peripheral portion abuts against the axial end surface of the stator;

[0023] A radial portion, the radial portion being arranged corresponding to the end side of the winding;

[0024] The inner circumference is arranged corresponding to the inner circumference of the end of the winding, and a gap is formed between the inner circumference and the axial end surface of the stator, and the gap is used for cooling oil to flow out.

[0025] Optionally, the first cooling channel includes a plurality of flow channels arranged in the cover body, the plurality of flow channels are arranged around the end of the winding, the flow channels are provided with a plurality of oil spray holes, the flow channels can flow cooling oil and spray cooling oil to the winding from the oil spray holes.

[0026] Optionally, the flow channel includes:

[0027] An outer peripheral flow channel, the outer peripheral flow channel is arranged at the outer peripheral portion, and the outer peripheral flow channel is provided with at least one oil injection hole;

[0028] A radial flow channel, the radial flow channel is arranged in the radial portion, and the radial flow channel is provided with at least one oil injection hole;

[0029] An inner peripheral flow channel is provided at the inner peripheral portion, and the inner peripheral flow channel is provided with at least one oil injection hole.

[0030] Optionally, the cover body is provided with a plurality of rib structures, the rib structures protrude from the inner side surface and / or the outer side surface of the cover body, and the flow channel is provided inside the rib structures.

[0031] Optionally, a sealing groove is provided at an edge of the outer peripheral portion abutting against the stator, and a sealing ring is provided in the sealing groove.

[0032] Optionally, the housing case is provided with a third cooling channel, the third cooling channel is communicated with the second cooling channel, the third cooling channel is capable of flowing cooling oil, and the cooling oil flows from the third cooling channel to the second cooling channel.

[0033] Optionally, the motor further comprises:

[0034] The casing end cover is provided with a fourth cooling channel, the fourth cooling channel is communicated with the third cooling channel, the fourth cooling channel can flow cooling oil, and the cooling oil flows from the fourth cooling channel to the third cooling channel.

[0035] A second aspect of the present invention provides an electric assembly, comprising a motor according to any one of the above technical solutions.

[0036] A third aspect of the present invention provides a vehicle, comprising a motor or electric assembly as described in any one of the above technical solutions.

[0037] According to a motor, electric assembly and vehicle of the present invention, a cover body is provided at the end of the stator winding, and a cooling channel is provided in the cover body to form a cooling oil spraying mechanism, so that cooling oil can be sprayed to the end of the stator winding, which significantly improves the cooling efficiency and prolongs the service life of the motor. It is also easy to assemble, has low cost and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The embodiments of the present invention and their description are shown in the drawings to explain the principles of the present invention. In the drawings,

[0039] Figure 1 A cross-sectional view of a motor according to a preferred embodiment of the present invention;

[0040] Figure 2 A cooling oil circulation diagram of a motor according to a preferred embodiment of the present invention;

[0041] Figure 3 A three-dimensional diagram of a first cover according to a preferred embodiment of the present invention;

[0042] Figure 4 is a cross-sectional view of a first cover body according to a preferred embodiment of the present invention;

[0043] Figure 5 for Figure 4 A partial enlarged view of the

[0044] Figure 6 is a three-dimensional diagram of a second cover according to a preferred embodiment of the present invention;

[0045] Figure 7 is a cross-sectional view of a second cover body according to a preferred embodiment of the present invention;

[0046] Figure 8 for Figure 7 A magnified partial view of .

[0047] Fig. 9 for Figure 2 A magnified view of section A;

[0048] Fig.10 It is a three-dimensional view of a stator core according to a preferred embodiment of the present invention.

[0049] Description of reference numerals:

[0050] 1: Casing cover 2: Casing body

[0051] 3: First bearing 4: Second bearing

[0052] 5: Motor shaft 6: First magnetic isolation plate

[0053] 7: Second magnetic isolation plate 8: Pressing ring

[0054] 9: Rotor laminations 10: Rotor laminations

[0055] 11: Rotor laminations 12: Rotor laminations

[0056] 13: Rotor laminations 14: Stator laminations

[0057] 15: stator lamination 16: stator lamination

[0058] 17: stator lamination 18: stator lamination

[0059] 19: First cover body 190: First cover body

[0060] 191: first flange 192: first transition cavity

[0061] 193: First outer peripheral portion 194: First radial portion

[0062] 195: first inner peripheral portion 20: second cover

[0063] 200: Second cover body 201: Second flange

[0064] 202: Sealing groove 203: Sealing ring

[0065] 204: second transition chamber 205: second peripheral portion

[0066] 206: second radial portion 207: second inner peripheral portion

[0067] 21: First radial flow channel 22: First axial flow channel

[0068] 23: Second axial flow channel 24: Third axial flow channel

[0069] 25: Second radial flow channel 26: Third radial flow channel

[0070] 27: stator tooth slot 28: tooth bottom oil hole

[0071] 29: Yoke oil hole 30: Second flow channel

[0072] 301: second peripheral flow channel 302: second radial flow channel

[0073] 303: Second inner flow channel 31: Oil injection hole

[0074] 32: Oil injection hole 33: Oil injection hole

[0075] 34: Oil injection hole 35: Oil injection hole

[0076] 36: First flow channel 361: First peripheral flow channel

[0077] 362: first radial flow channel 363: first inner flow channel

[0078] 37: Oil injection hole 38: Oil injection hole

[0079] 39: Oil injection hole 40: Oil injection hole

[0080] 41: Oil injection hole 42: Oil injection hole

[0081] 43: Oil injection hole 44: Oil injection hole

[0082] 50: Winding welding end 60: Winding hairpin end

[0083] 70: rotor 80: stator

[0084] 81: Winding 82: Stator core

[0085] 83: Cooling ring groove 84: Gap DETAILED DESCRIPTION

[0086] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0087] In order to fully understand the present invention, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0088] Ordinal numbers such as "first" and "second" cited in the present invention are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0089] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0090] The invention discloses a motor, an electric assembly and a vehicle.

[0091] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

[0092] like Figure 1 , Figure 2As shown, in a preferred embodiment, a motor includes: a stator 80 and a cover; the stator 80 is fixed inside the housing 2;

[0093] The stator 80 includes a winding 81, which is an electromagnetic circuit composed of a plurality of wires or coils. When the motor is running, the winding 81 can generate a magnetic field, which generates an electromagnetic effect with the rotor 70 to drive the rotor 70 to rotate.

[0094] The cover is adjacent to the stator 80 and relatively fixed. The cover is arranged corresponding to the winding 81, and the cover partially surrounds the end of the winding 81; the partial surround can also be called half surround, which requires that at least two wraps of the cover surround the end of the winding 81;

[0095] A first cooling channel is provided inside the cover body, and cooling oil can flow through the first cooling channel. The cooling oil is sprayed toward the winding 81 from the first cooling channel, and the cooling oil can cool the winding 81 .

[0096] In the motor of this embodiment, the cooling oil can enter the first cooling channel of the cover body and spray the cooling oil toward the stator winding, significantly improving the cooling effect of the motor cooling system. The cover body adopts an incomplete sealing design to partially surround the end of the winding 81. On the one hand, the cooling oil can fully exchange heat with the winding in the cover body. On the other hand, the incomplete sealing design reduces the difficulty of cover body design and processing, which can effectively improve reliability and reduce production costs. The cooling structure of the motor has the advantages of simple structure, low cost, easy assembly and high reliability, and can solve the problem that the immersion cooling method cannot be sealed due to special-shaped windings.

[0097] The two ends of the winding 81 can generally be divided into a hairpin end and a welding end. Figure 1 The left side in the middle is a hairpin end, and the conductor in the winding 81 has a twisted structure on the left side. The right side is a welding end, and the conductor in the winding 81 is connected by welding on the right side to form a passage.

[0098] The motor in this embodiment may be an electric motor, a generator, or an electric-generator integrated machine.

[0099] In one embodiment, if Figure 1 , Figure 2 As shown, the motor also includes:

[0100] The rotor 70 has a permanent magnet disposed therein. When the motor is running, the stator 80 and the rotor 70 generate an electromagnetic effect to drive the rotor 70 to rotate.

[0101] The rotor 70 also includes a rotor core, which can be made of laminated silicon steel sheets, for example, rotor laminations 9, 10, 11, 12, and 13 in the figure are combined to form the rotor core. Magnetic steel slots are provided in the rotor core for mounting and fixing permanent magnets.

[0102] In one embodiment, if Figure 1 , Figure 2 As shown, the stator 80 also includes:

[0103] The stator core 82 is provided with a second cooling channel, and the second cooling channel can flow cooling oil, and the cooling oil flows from the second cooling channel to the first cooling channel. Through this arrangement, the cooling channel can be provided by using the stator core 82, the integration of the cooling channel and the motor is improved, and the stator core 82 can be cooled at the same time.

[0104] The second cooling channel is not directly connected to the first cooling channel, but because the cover body is adjacent to the stator 80 and relatively fixed, the cooling oil output from the second cooling channel can flow into the first cooling channel along the outer circumferential surface of the cover body (using the transition cavity), thereby realizing the circulation of cooling oil between the second cooling channel and the first cooling channel.

[0105] The stator core 82 may be made of laminated silicon steel sheets. For example, the stator laminations 14 , 15 , 16 , 17 , and 18 in the figure are combined to form the stator core 82 .

[0106] In one embodiment, if Figure 1 , Figure 2 As shown, the cover body includes:

[0107] A first cover 19, the first cover 19 is disposed at a first axial end of the stator 80, namely, a right end of the stator 80 in the figure;

[0108] The second cover body 20 is disposed at the second axial end of the stator 80 , namely the left end of the stator 80 in the figure.

[0109] The first cover body 19 and the second cover body 20 have the same structure and are symmetrically arranged, but their shapes may be slightly different, and they are designed accordingly according to the shapes of the two ends of the winding 81 and the internal shape of the housing case 2 .

[0110] In one embodiment, if Figure 1 , Figure 2 As shown, the motor also includes:

[0111] The casing body 2, the axial end faces of the casing body 2 and the stator core 82 and the outer circumferential surface of the cover body are combined to form a transition cavity, and the first cooling channel and the second cooling channel are connected through the transition cavity.

[0112] like Figure 1 As shown, the housing case 2, the right axial end surface of the stator core 82 and the outer circumferential surface of the first cover body 19 are combined to form a first transition cavity 192, and the first cooling channel in the first cover body 19 and the second cooling channel in the stator core 82 are connected through the first transition cavity 192.

[0113] The housing case 2 , the left axial end surface of the stator core 82 and the outer circumferential surface of the second cover body 20 are combined to form a second transition cavity 204 , and the first cooling channel in the second cover body 20 and the second cooling channel in the stator core 82 are connected through the second transition cavity 204 .

[0114] In one embodiment, if Figure 1 , Figure 2 As shown, the outer circumferential surface of the cover body is provided with a radially protruding flange, the flange is in contact with the housing case 2, the entrance of the first cooling channel is located between the flange and the stator core 82, and the flange is used to block the cooling oil so that the cooling oil flows into the entrance of the first cooling channel. The flange is a part of the structure that constitutes the transition cavity. By providing the flange, the flow direction of the cooling oil can be guided to form a cooling oil flow path.

[0115] like Figure 3 , Figure 4 , Figure 5 As shown, the outer circumferential surface of the first cover body 19 is provided with a radially protruding first flange 191, and the entrance of the first cooling channel (i.e., the first flow channel 36) in the first cover body 19 is located between the first flange 191 and the stator 80, and the first flange 191 is used to block the cooling oil so that the cooling oil flows into the entrance of the first flow channel 36.

[0116] The first flange 191 can be provided to guide the flow direction of the cooling oil and form a cooling oil flow path. The first cover 19 can also be fixed in the motor by the first flange 191, and the first flange 191 can limit the first cover 19 in the motor in radial and axial directions.

[0117] like Figure 6 , Figure 7 , Figure 8 As shown, the outer circumferential surface of the second cover body 20 is provided with a radially protruding second flange 201, and the entrance of the first cooling channel (i.e., the second flow channel 30) in the second cover body 20 is located between the second flange 201 and the stator 80, and the second flange 201 is used to block the cooling oil so that the cooling oil flows into the entrance of the second flow channel 30.

[0118] The second flange 201 can be provided to guide the flow direction of the cooling oil and form a cooling oil flow path. The second cover 20 can also be fixed in the motor by the second flange 201, and the second flange 201 can limit the second cover 20 in the motor in radial and axial directions.

[0119] In one embodiment, if Figure 1 , Figure 2 As shown, the second cooling channel includes:

[0120] The cooling annular groove 83 is provided on the outer circumference of the stator core 82, and the cooling annular groove 83 is connected to the third cooling channel. Since the stator core 82 is fixed in the housing 2, usually by using a keyway fitting relationship, the outer circumference of the stator core 82 contacts the inner wall of the housing 2, and the cooling annular groove 83 is provided to facilitate connection with the third cooling channel in the housing 2.

[0121] In one embodiment, if Figure 1 , Figure 2 , Fig.10 As shown, the second cooling channel also includes:

[0122] The tooth bottom oil hole 28 is arranged on the stator core 82 along the axial direction of the motor, and the inlet end of the tooth bottom oil hole 28 is connected to the cooling ring groove 83, and the outlet end of the tooth bottom oil hole 28 corresponds to the end of the winding 81. By providing the tooth bottom oil hole 28, the cooling oil can be guided to flow out of the cooling ring groove 83 and flow to the end of the stator winding 81, thereby increasing the cooling oil and improving the cooling effect on the winding 81.

[0123] In one embodiment, if Figure 1 , Figure 2 , Fig.10 As shown, the second cooling channel also includes:

[0124] The yoke oil hole 29 is arranged on the stator core 82 along the axial direction of the motor, the inlet end of the yoke oil hole 29 is connected to the cooling ring groove 83, and the outlet end of the yoke oil hole 29 is arranged corresponding to the first cooling channel of the cover body. By setting the yoke oil hole 29, the cooling oil can be guided to flow out of the cooling ring groove 83 and flow to the first cover body 19 and the second cover body 20, that is, the cooling oil is guided to flow from the second cooling channel to the first cooling channel.

[0125] In one embodiment, if Figure 1 , Figure 2 , Fig.10 As shown, the stator core 82 includes:

[0126] The outer diameter of the stator laminations in the middle of the stator core 82 is smaller than the outer diameter of the stator laminations on both sides, so that a cooling ring groove 83 is formed in the middle of the stator core 82. This arrangement facilitates the formation of the cooling ring groove 83 in the middle of the stator core 82, which can reduce the processing difficulty and cost.

[0127] In one embodiment, if Figure 1 , Figure 2As shown, the cover body is arranged at the axial end of the stator 80, and the cover body includes:

[0128] The outer peripheral portion is arranged at the outer periphery of the end of the winding 81, and one end of the outer peripheral portion abuts against the axial end surface of the stator 80;

[0129] A radial portion, the radial portion is arranged corresponding to the end side of the winding 81;

[0130] The inner circumference is arranged corresponding to the inner circumference of the end of the winding 81, and a gap 84 is formed between the inner circumference and the axial end surface of the stator 80, and the gap 84 is used for the cooling oil to flow out.

[0131] like Figure 3 , Figure 4 , Figure 5 As shown, the first cover 19 is disposed at the right axial end of the stator 80, and the first cover 19 includes:

[0132] A first outer peripheral portion 193, the first outer peripheral portion 193 is arranged corresponding to the outer periphery of the right end portion of the winding 81, and one end of the first outer peripheral portion 193 abuts against the right axial end surface of the stator 80;

[0133] A first radial portion 194, the first radial portion 194 is arranged corresponding to the right end side of the winding 81;

[0134] The first inner circumference 195 is arranged corresponding to the inner circumference of the right end of the winding 81, and a gap 84 is formed between the first inner circumference 195 and the right axial end surface of the stator 80, and the gap 84 is used to flow out the cooling oil. The cooling oil sprayed on the winding 81 can flow out from the gap 84, gather at the bottom of the housing 2 and output the motor, and then participate in the cooling cycle.

[0135] The first outer peripheral portion 193 , the first radial portion 194 , and the first inner peripheral portion 195 are integrally formed. The length of the first inner peripheral portion 195 is smaller than that of the first outer peripheral portion 193 . These three portions constitute the first cover body 190 of a C-shaped structure.

[0136] like Figure 6 , Figure 7 , Figure 8 As shown, the second cover 20 is disposed at the left axial end of the stator 80, and the second cover 20 includes:

[0137] A second outer peripheral portion 205, the second outer peripheral portion 205 is arranged corresponding to the outer periphery of the left end portion of the winding 81, and one end of the second outer peripheral portion 205 abuts against the left axial end surface of the stator 80;

[0138] A second radial portion 206, the second radial portion 206 is arranged corresponding to the left end side of the winding 81;

[0139] The second inner circumference 207 is arranged corresponding to the inner circumference of the left end of the winding 81, and a gap 84 is formed between the second inner circumference 207 and the left axial end surface of the stator 80, and the gap 84 is used to flow out the cooling oil. The cooling oil sprayed on the winding 81 can flow out from the gap 84, gather at the bottom of the housing 2 and output the motor, and then participate in the cooling cycle.

[0140] The second outer peripheral portion 205 , the second radial portion 206 , and the second inner peripheral portion 207 are integrally formed. The second inner peripheral portion 207 is shorter than the second outer peripheral portion 205 . These three portions constitute the second cover body 200 of a C-shaped structure.

[0141] In one embodiment, if Figure 3 , Figure 6 As shown, the first cooling channel includes a plurality of flow channels arranged in the cover body, the plurality of flow channels are arranged around the end of the winding 81, the flow channels are provided with a plurality of oil spray holes, the flow channels can flow cooling oil and spray cooling oil to the winding 81 from the oil spray holes.

[0142] like Figure 3 , Figure 4 , Figure 5 As shown, the first cooling channel in the first cover body 19 includes a plurality of first flow channels 36, and the plurality of first flow channels 36 are arranged around the right end of the winding 81. The first flow channel 36 is provided with a plurality of oil spray holes. The first flow channel 36 can circulate cooling oil and spray cooling oil toward the winding 81 from the oil spray holes.

[0143] As needed, a plurality of first flow channels 36 , for example, 24, 36, 48, 96, etc., are provided on the first cover body 19 , and the plurality of first flow channels 36 are evenly distributed around the first cover body 19 .

[0144] In the figure, the multiple oil spray holes are respectively: oil spray hole 37, oil spray hole 38, oil spray hole 39, oil spray hole 40, oil spray hole 41, oil spray hole 42, oil spray hole 43, and oil spray hole 44 from top to bottom. By providing multiple oil spray holes, the first flow channel 36 can spray cooling oil to the winding 81 from multiple angles, thereby improving the cooling effect on the winding 81.

[0145] like Figure 6 , Figure 7 , Figure 8 As shown, the first cooling channel in the second cover body 20 includes a plurality of second flow channels 30, and the plurality of second flow channels 30 are arranged around the left end portion of the winding 81. The second flow channel 30 is provided with a plurality of oil spray holes, and the second flow channel 30 can circulate cooling oil and spray cooling oil toward the winding 81 from the oil spray holes.

[0146] As needed, a plurality of second flow channels 30 , for example, 18, 36, 48, 96, etc., are provided on the second cover body 20 , and the plurality of second flow channels 30 are evenly distributed around the second cover body 20 .

[0147] The multiple oil spray holes in the figure are respectively: oil spray hole 31, oil spray hole 32, oil spray hole 33, oil spray hole 34, and oil spray hole 35 from top to bottom. By providing multiple oil spray holes, the second flow channel 30 can spray cooling oil to the winding 81 from multiple angles, thereby improving the cooling effect on the winding 81.

[0148] In one embodiment, if Figure 3 , Figure 6 As shown, the flow channel includes the following connected in sequence:

[0149] The peripheral flow channel is arranged at the peripheral portion, and the peripheral flow channel is provided with at least one oil injection hole;

[0150] A radial flow channel, the radial flow channel is arranged in the radial portion, and the radial flow channel is provided with at least one oil injection hole;

[0151] The inner peripheral flow channel is arranged at the inner peripheral part, and the inner peripheral flow channel is provided with at least one oil injection hole.

[0152] like Figure 4 , Figure 5 As shown, the first flow channel 36 includes:

[0153] A first peripheral flow channel 361, the first peripheral flow channel 361 is disposed at the first peripheral portion 193, and the first peripheral flow channel 361 is provided with at least one oil injection hole;

[0154] A first radial flow channel 362, the first radial flow channel 362 is disposed in the first radial portion 194, and the first radial flow channel 362 is provided with at least one oil injection hole;

[0155] The first inner peripheral flow channel 363 is disposed in the first inner peripheral portion 195 , and the first inner peripheral flow channel 363 is provided with at least one oil injection hole.

[0156] The first flow channel 36 is C-shaped as a whole, and the inlet of the first flow channel 36 is arranged on the outer circumference of the first outer peripheral portion 193. By designing the first flow channel 36 to conform to the first cover body 190, the length of the first flow channel 36 can be extended, the spraying range of the first flow channel 36 can be expanded, and the cooling effect on the winding 81 can be improved.

[0157] like Figure 7 , Figure 8 As shown, the second flow channel 30 includes:

[0158] A second peripheral flow channel 301, which is disposed on the second peripheral portion 205, and is provided with at least one oil injection hole;

[0159] A second radial flow channel 302, the second radial flow channel 302 is disposed in the second radial portion 206, and the second radial flow channel 302 is provided with at least one oil injection hole;

[0160] The second inner peripheral flow channel 303 is disposed in the second inner peripheral portion 207 , and the second inner peripheral flow channel 303 is provided with at least one oil injection hole.

[0161] The second flow channel 30 is C-shaped as a whole, and the inlet of the second flow channel 30 is arranged on the outer circumferential surface of the second outer peripheral portion 205. By designing the second flow channel 30 and the second cover body 200 to conform to each other, the length of the second flow channel 30 can be extended, the spraying range of the second flow channel 30 can be expanded, and the cooling effect on the winding 81 can be improved.

[0162] In one embodiment, if Figure 3 , Figure 6 As shown, the cover body is provided with a plurality of rib structures, the rib structures protrude from the inner side surface and / or the outer side surface of the cover body, and the flow channel is provided inside the rib structure.

[0163] like Figure 3 , Figure 4 , Figure 5 As shown, the rib structure of the first cover body 19 protrudes from the inner side and the outer side of the first cover body 190, and the first flow channel 36 is arranged inside the rib structure. Because the thickness of the first cover body 190 is relatively thin, the rib structure protrudes from the first cover body 190 to form the first flow channel 36 for circulating cooling oil, and there is no need to thicken the first cover body 190 as a whole to increase the cost.

[0164] like Figure 6 , Figure 7 , Figure 8 As shown, the rib structure of the second cover body 20 protrudes from the inner side and the outer side of the second cover body 200, and the second flow channel 30 is arranged inside the rib structure. Because the thickness of the second cover body 200 is relatively thin, the rib structure protrudes from the second cover body 200 to form the second flow channel 30 for circulating cooling oil, and there is no need to thicken the second cover body 200 as a whole to increase the cost.

[0165] In one embodiment, if Figure 8 , Fig. 9 As shown, a sealing groove 202 is provided at the edge of the second cover body 200 that contacts the stator 80, and a sealing ring 203 is provided in the sealing groove 202, which can seal the portion where the cover edge contacts the stator 80 to prevent cooling oil from flowing out of the portion and causing confusion in the cooling oil circulation path.

[0166] In one embodiment, if Figure 1 , Figure 2As shown, the casing body 2 is provided with a third cooling channel, and the third cooling channel can circulate cooling oil, and the cooling oil circulates from the third cooling channel to the second cooling channel. Through this arrangement, the casing body 2 can be used to set the cooling channel, and the integration of the cooling channel and the motor is improved.

[0167] In one embodiment, if Figure 1 , Figure 2 As shown, the third cooling channel includes:

[0168] The second radial flow channel 25 is arranged in the housing 2 along the radial direction of the motor, and the first end of the second radial flow channel 25 is connected to the second cooling channel of the stator core 82. Because the cooling annular groove 83 is arranged radially, the second radial flow channel 25 needs to dock with the cooling annular groove 83, so the second radial flow channel 25 is arranged along the radial direction of the motor.

[0169] In one embodiment, if Figure 1 , Figure 2 As shown, the third cooling channel also includes:

[0170] A second axial flow channel 23, the second axial flow channel 23 is arranged on the housing 2 along the axial direction of the motor;

[0171] A third axial flow channel 24, the third axial flow channel 24 is arranged on the housing 2 along the axial direction of the motor;

[0172] The third axial flow channel 24 is connected to the second end of the second radial flow channel 25 , and the third axial flow channel 24 is connected to the second axial flow channel 23 . The inner diameter of the third axial flow channel 24 is smaller than the inner diameter of the second axial flow channel 23 .

[0173] According to the flow path of the cooling oil, multiple flow channels are arranged in the housing case 2 to form a third cooling channel. Because the second axial flow channel 23 also needs to connect to the fourth cooling channel, the inner diameter of the second axial flow channel 23 needs to be designed to be larger.

[0174] The second axial flow channel 23, the third axial flow channel 24 and the second radial flow channel 25 can be arranged at the upper part of the casing 2, so that the cooling oil flows from top to bottom into the second cooling channel of the stator core 82, thereby accelerating the flow speed of the cooling oil.

[0175] In one embodiment, if Figure 1 , Figure 2 As shown, the motor also includes:

[0176] The casing end cover 1 is provided with a fourth cooling channel, the fourth cooling channel can flow cooling oil, and the cooling oil flows from the fourth cooling channel to the third cooling channel. Through this arrangement, the casing end cover 1 can be used to set the cooling channel, thereby improving the integration of the cooling channel and the motor.

[0177] In one embodiment, if Figure 1 , Figure 2 As shown, the fourth cooling channel includes:

[0178] A first radial flow channel 21, the first radial flow channel 21 is arranged on the housing end cover 1 along the radial direction of the motor;

[0179] A first axial flow channel 22, the first axial flow channel 22 is arranged on the housing end cover 1 along the axial direction of the motor;

[0180] Both ends of the first axial flow channel 22 are connected to the second axial flow channel 23 and the first radial flow channel 21 respectively. The inner diameter of the first axial flow channel 22 is not less than the inner diameter of the first radial flow channel 21 , and the inner diameter of the first axial flow channel 22 is less than the inner diameter of the second axial flow channel 23 .

[0181] According to the flow path of the cooling oil, multiple flow channels are arranged in the housing end cover 1 to form a fourth cooling channel. Because the second axial flow channel 23 needs to dock with the first axial flow channel 22, the inner diameters of the two need to be designed to be different, so that the docking is convenient and there is a certain fault tolerance function.

[0182] Because the middle of the casing end cover 1 is the main inlet of the cooling oil, it is necessary to arrange the first radial flow channel 21 on the casing end cover 1 along the radial direction of the motor to facilitate connection with the main inlet.

[0183] In one embodiment, if Figure 1 , Figure 2 As shown, the motor also includes:

[0184] The motor shaft 5, the rotor 70 is arranged on the motor shaft 5, and the motor shaft 5 supports the rotor 70 to rotate;

[0185] A first bearing 3, which is disposed in the middle of the housing end cover 1 and supports a first end of the motor shaft 5;

[0186] The second bearing 4 is arranged in the middle of the left side of the casing 2 to support the second end of the motor shaft 5 .

[0187] A third radial flow channel 26 is provided on the left side of the casing body 2. The third radial flow channel 26 is connected to the third axial flow channel 24 of the third cooling channel, and can spray cooling oil to the second bearing 4 to play a role of cooling and lubrication.

[0188] The specific assembly process of the motor in this embodiment is as follows:

[0189] Install the second bearing 4 into the casing body 2, and install the second cover body 20 into the casing body 2; install the stator core 82 and the stator winding 81 into the casing body 2; fix the motor shaft 5, the first magnetic isolation plate 6, the rotor core with permanent magnets, the second magnetic isolation plate 7 and the pressure ring 8 together (the pressure ring 8 and the motor shaft 5 are interference fit), and install the whole into the casing body 2; install the first cover body 19 into the casing body 2; install the first bearing 3 into the casing end cover 1; finally, connect the combined casing end cover 1 and the casing body 2 to complete the assembly of the motor.

[0190] like Figure 2 As shown by the middle arrow, after the cooling oil passes through the oil pump and the oil cooler in sequence, part of the cooling oil is separated to cool the first bearing 3 and the rotor 70, and the remaining cooling oil enters the top of the motor through the first radial flow channel 21 of the housing end cover 1. After entering the first radial flow channel 21, the cooling oil enters the first axial flow channel 22, the second axial flow channel 23 and the third axial flow channel 24 in sequence. The cooling oil flowing into the third axial flow channel 24 is divided into two paths, one path flows into the stator 80 through the second radial flow channel 25, and the other path cools the second bearing 4 through the third radial flow channel 26.

[0191] like Fig.10 As shown, the cooling oil flowing into the second radial flow channel 25 flows into the groove (cooling ring groove 83) of the stator lamination 16, and the cooling oil flowing into the groove is divided into two paths, one path flows into the oil collecting chamber of the first cover 19 and the oil collecting chamber of the second cover 20 through the yoke oil hole 29, and the other path is sprayed to the winding welding end and the winding hairpin end through the tooth bottom oil hole 28 close to the stator tooth slot 27. Among them, the end surface shapes of the stator lamination 14, the stator lamination 15, the stator lamination 16, the stator lamination 17 and the stator lamination 18 are consistent.

[0192] An embodiment of the present invention further provides an electric assembly, comprising the motor described in any one of the above embodiments.

[0193] The electric assembly may also include a reducer, a differential, a half shaft, etc. The reducer is connected to the motor drive and is driven by the motor.

[0194] An embodiment of the present invention further provides a vehicle, comprising the motor according to any one of the above embodiments or the motor electric assembly described in the above embodiments.

[0195] The vehicle can be either a pure electric vehicle or a hybrid vehicle.

[0196] A motor, an electric assembly and a vehicle of the present invention have the following characteristics:

[0197] The solution of the present invention has a simple structure, is easy to assemble, has a low cost, and has high reliability, can be applied to motors with special-shaped windings, and is conducive to realizing mass production of the proposed solution.

[0198] The present invention not only sprays the winding from the axis, but also designs spray ports in multiple directions such as radial direction to spray the winding. In addition, the cover of the present invention adopts a semi-enclosed design, which can fully exchange heat between the coolant and the winding, and has the same cooling effect as the immersion oil cooling, while avoiding the difficulties of the immersion oil cooling sealing design. Therefore, the heat dissipation effect of the present invention is better and more suitable for motors with high heat generation.

[0199] The present invention does not occupy additional space of the motor, can effectively reduce the overall volume of the motor, and the space distance between the cover and the winding is closer, which can effectively improve the heat dissipation effect.

[0200] The cover body of the present invention is also an annular structure, and can be quickly switched to a motor using a spray ring without changing the original structure of the motor, so it has a wider range of applications and higher reliability.

[0201] The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

[0202] In understanding the scope of the present invention, the term "comprise" and its derivatives as used herein are intended to be open terms, which specify the existence of recorded features, elements, components, groups, wholes and / or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "include", "have" and their derivatives.

[0203] The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

[0204] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0205] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A motor, characterized in that: include: A stator (80), the stator (80) comprising a winding (81); A cover body, the cover body is adjacent to the stator (80) and relatively fixed, the cover body is arranged corresponding to the winding (81), and the cover body at least partially surrounds the end of the winding (81); A first cooling channel is provided inside the cover body, and cooling oil can flow through the first cooling channel, and cooling oil is sprayed toward the winding (81) from the first cooling channel.

2. The motor according to claim 1, characterized in that The stator (80) further comprises: The stator core (82) is provided with a second cooling channel, the second cooling channel is capable of flowing cooling oil, and the cooling oil flows from the second cooling channel to the first cooling channel.

3. The motor according to claim 2, characterized in that Also includes: A casing body (2), wherein the casing body (2), the axial end surface of the stator core (82) and the outer circumferential surface of the cover body are combined to form a transition cavity, and the first cooling channel and the second cooling channel are connected through the transition cavity.

4. The motor according to claim 3, characterized in that The outer circumferential surface of the cover body is provided with a radially protruding flange, the flange is in contact with the housing case (2), the entrance of the first cooling channel is located between the flange and the stator core (82), and the flange is used to block cooling oil so that the cooling oil flows into the entrance of the first cooling channel.

5. The motor according to claim 3, characterized in that The second cooling channel comprises: A cooling annular groove (83), wherein the cooling annular groove (83) is arranged on the outer circumference of the stator core (82); A yoke oil hole (29), wherein the yoke oil hole (29) is arranged on the stator core (82) along the axial direction of the motor, the inlet end of the yoke oil hole (29) is connected to the cooling ring groove (83), and the outlet end of the yoke oil hole (29) is connected to the transition chamber.

6. The motor according to claim 5, characterized in that The second cooling channel also includes: An oil hole (28) at the bottom of the tooth, wherein the oil hole (28) is arranged on the stator core (82) along the axial direction of the motor, an inlet end of the oil hole (28) is connected to the cooling ring groove (83), and an outlet end of the oil hole (28) corresponds to an end of the winding (81).

7. The motor according to claim 5, characterized in that The stator core (82) comprises: A plurality of groups of stator laminations, wherein the outer diameter of the stator laminations located in the middle of the stator core (82) is smaller than the outer diameter of the stator laminations on both sides, thereby forming the cooling ring groove (83) in the middle of the stator core (82).

8. The motor according to claim 1, characterized in that The cover body is arranged at the axial end of the stator (80), and the cover body comprises: An outer peripheral portion, the outer peripheral portion is arranged corresponding to the outer periphery of the end of the winding (81), and one end of the outer peripheral portion abuts against the axial end surface of the stator (80); A radial portion, the radial portion being arranged corresponding to the end side of the winding (81); An inner peripheral portion is arranged corresponding to the inner periphery of the end of the winding (81), and a gap (84) is formed between the inner peripheral portion and the axial end surface of the stator (80), and the gap (84) is used for the cooling oil to flow out.

9. The motor according to claim 8, characterized in that The first cooling channel comprises a plurality of flow channels arranged in the cover body, the plurality of flow channels being arranged around the end of the winding (81), the flow channels being provided with a plurality of oil spray holes, the flow channels being capable of circulating cooling oil and spraying cooling oil from the oil spray holes toward the winding (81).

10. The motor according to claim 9, characterized in that The flow channel includes: An outer peripheral flow channel, the outer peripheral flow channel is arranged at the outer peripheral portion, and the outer peripheral flow channel is provided with at least one oil injection hole; A radial flow channel, the radial flow channel is arranged in the radial portion, and the radial flow channel is provided with at least one oil injection hole; An inner peripheral flow channel is provided at the inner peripheral portion, and the inner peripheral flow channel is provided with at least one oil injection hole.

11. The motor according to claim 9, characterized in that The cover body is provided with a plurality of rib structures, the rib structures protrude from the inner side surface and / or the outer side surface of the cover body, and the flow channel is arranged inside the rib structures.

12. The motor according to claim 8, characterized in that A sealing groove is provided at the edge of the outer peripheral portion abutting against the stator (80), and a sealing ring is provided in the sealing groove.

13. The motor according to claim 2, characterized in that The housing case (2) is provided with a third cooling channel, the third cooling channel is communicated with the second cooling channel, the third cooling channel is capable of circulating cooling oil, and the cooling oil circulates from the third cooling channel to the second cooling channel.

14. The motor according to claim 13, characterized in that Also includes: A casing end cover (1), wherein the casing end cover (1) is provided with a fourth cooling channel, the fourth cooling channel is connected to the third cooling channel, the fourth cooling channel is capable of circulating cooling oil, and the cooling oil circulates from the fourth cooling channel to the third cooling channel.

15. An electric assembly, characterized in that: Comprising a motor according to any one of claims 1-14.

16. A vehicle, characterized in that: It comprises the electric motor according to any one of claims 1 to 14 or the electric assembly according to claim 15.

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