Motor, power assembly and vehicle

Abstract

The invention discloses a motor, a power assembly and a vehicle. The motor comprises a shell, a stator core, a winding, a first collector ring and a second collector ring. A liquid inlet is formed in the shell. And an outer flow channel is formed between the stator core and the cavity wall of the mounting cavity. The winding has a first winding portion and a second winding portion. The first collector ring forms a first confluence space, and the first winding part is accommodated in the first confluence space. The second collector ring forms a second confluence space, and the second winding part is accommodated in the second confluence space. According to the technical scheme, the shell of the motor and the stator iron core form the outer flow channel of the motor, the cooling liquid can make contact with the shell and the stator iron core forming the outer flow channel in the process that the cooling liquid flows through the outer flow channel, and heat on the surfaces of the shell and the stator iron core is taken away, so that winding cooling is completed, and meanwhile the cooling effect is improved. Cooling of the shell and the stator core is considered, and the cooling effect of the cooling liquid on the motor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor heat dissipation, and in particular to a motor, a power assembly and a vehicle. Background Art

[0002] The motor generates a lot of heat during operation, which will affect the normal use of the motor. In order to dissipate the heat of the motor winding, in the related art, a slip ring is installed on both sides of the stator core of the motor, and the end of the motor winding is arranged in the slip ring. The slip ring is provided with a liquid inlet, and the coolant can flow into the slip ring from the liquid inlet, and under the collection of the slip ring, the winding end in the slip ring is infiltrated, thereby reducing the temperature of the motor winding.

[0003] However, this heat dissipation method can only dissipate heat for the windings, but lacks effective heat dissipation means for the stator core and motor housing where heat is also accumulated. Summary of the invention

[0004] The purpose of the present invention is to provide a motor, a power assembly and a vehicle, aiming to solve the problem of lack of effective heat dissipation of the motor housing and the stator core in the related art.

[0005] To achieve the purpose of the present invention, in a first aspect, the present invention provides a motor, the motor comprising:

[0006] A housing, wherein the housing is formed with a liquid inlet and a mounting cavity, and the liquid inlet is connected to the mounting cavity;

[0007] A stator core is disposed in the installation cavity, the stator core having a first end face and a second end face which are axially opposite to each other, and an outer flow channel is formed between the stator core and the cavity wall of the installation cavity;

[0008] A winding, provided on the stator core, the winding having a first winding portion protruding from the first end surface and a second winding portion protruding from the second end surface;

[0009] A first slip ring is provided at one side of the first end surface, the area between the first slip ring and the first end surface forms a first slip space, and the first winding portion is accommodated in the first slip space;

[0010] The second convergence ring is arranged on one side of the second end face, the area between the second convergence ring and the second end face forms a second convergence space, and the second winding part is accommodated in the second convergence space; the liquid inlet is connected to the first convergence space and the second convergence space via the external flow channel.

[0011] In a possible implementation, the outer flow channel includes a first outer flow channel and a second outer flow channel, the liquid inlet is connected to the second outer flow channel via the first outer flow channel; the second outer flow channel is connected to the first confluence space and the second confluence space;

[0012] The first outer flow channel is extended along the circumferential direction of the stator core, and the second outer flow channel is extended along the axial direction of the stator core.

[0013] In a possible implementation, the outer circumference of the stator core is recessed inward to form a groove, and the groove and the cavity wall of the installation cavity are arranged to form the first outer flow channel; the groove is arranged around the circumference of the stator core.

[0014] In a possible implementation, a plurality of protrusions are provided on the outer peripheral surface of the stator core, the plurality of protrusions are arranged in the first outer flow channel, and the protrusions are used to divert the coolant.

[0015] In a possible implementation, the multiple protrusions include a first protrusion ring and a second protrusion ring arranged axially along the stator core, the first protrusion ring includes a plurality of first protrusions spaced apart along the circumferential direction of the stator core; the second protrusion ring includes a plurality of second protrusions spaced apart along the circumferential direction of the stator core; the first protrusions in the first protrusion ring and the second protrusions in the second protrusion ring are staggered.

[0016] In a possible implementation, the liquid inlet is connected to a first position of the installation cavity; the second outer flow channel is provided at a second position of the installation cavity;

[0017] The arc angle between the first position and the second position in the circumferential direction of the installation cavity is A, and 8π / 9≤A≤8π / 7.

[0018] In a possible implementation, the first confluence space is provided with a first liquid outlet, and the second confluence space is provided with a second liquid outlet.

[0019] In a possible implementation, the second outer flow channel is connected to a third position of the first confluence space;

[0020] The first liquid outlet is arranged at the fourth position of the first confluence space; the third position and the fourth position are arranged at intervals along the circumference of the first confluence space, and the arc of the circumferential line connecting the third position and the fourth position along the first confluence space is B, 8π / 9≤B≤8π / 7.

[0021] In a possible implementation, the second outer flow channel is connected to a fifth position of the second confluence space;

[0022] The second liquid outlet is arranged at the sixth position of the second confluence space; the fifth position and the sixth position are arranged at intervals along the circumference of the second confluence space, and the arc of the circumferential line connecting the fifth position and the sixth position along the first confluence space is C, 8π / 9≤C≤8π / 7.

[0023] In a possible implementation, the motor also includes a third outer flow channel, which is extended along the axial direction of the stator core, and the third outer flow channel and the second outer flow channel are spaced apart from each other along the circumferential direction of the stator core, and the liquid inlet is also connected to the first confluence space via the third outer flow channel.

[0024] In a possible implementation, the liquid inlet is also connected to the second confluence space via the third external flow channel.

[0025] In a possible implementation, an inner flow channel is provided in the stator core, and the inner flow channel penetrates the stator core along the axial direction of the stator core;

[0026] One end of the inner flow channel is connected to the first confluence space, and the other end of the inner flow channel is connected to the second confluence space.

[0027] In a second aspect, the present invention further provides a power assembly, the power assembly comprising a motor, the motor comprising:

[0028] A housing, wherein the housing is formed with a liquid inlet and a mounting cavity, and the liquid inlet is connected to the mounting cavity;

[0029] A stator core is disposed in the installation cavity, the stator core having a first end face and a second end face which are axially opposite to each other, and an outer flow channel is formed between the stator core and the cavity wall of the installation cavity;

[0030] A winding, provided on the stator core, the winding having a first winding portion protruding from the first end surface and a second winding portion protruding from the second end surface;

[0031] A first slip ring is provided at one side of the first end surface, the area between the first slip ring and the first end surface forms a first slip space, and the first winding portion is accommodated in the first slip space;

[0032] The second convergence ring is arranged on one side of the second end face, the area between the second convergence ring and the second end face forms a second convergence space, and the second winding part is accommodated in the second convergence space; the liquid inlet is connected to the first convergence space and the second convergence space via the external flow channel.

[0033] In a third aspect, the present invention further provides a vehicle, the vehicle comprising a motor, the motor comprising:

[0034] A housing, wherein the housing is formed with a liquid inlet and a mounting cavity, and the liquid inlet is connected to the mounting cavity;

[0035] A stator core is disposed in the installation cavity, the stator core having a first end face and a second end face which are axially opposite to each other, and an outer flow channel is formed between the stator core and the cavity wall of the installation cavity;

[0036] A winding, provided on the stator core, the winding having a first winding portion protruding from the first end surface and a second winding portion protruding from the second end surface;

[0037] A first slip ring is provided at one side of the first end surface, the area between the first slip ring and the first end surface forms a first slip space, and the first winding portion is accommodated in the first slip space;

[0038] The second convergence ring is arranged on one side of the second end face, the area between the second convergence ring and the second end face forms a second convergence space, and the second winding part is accommodated in the second convergence space; the liquid inlet is connected to the first convergence space and the second convergence space via the external flow channel.

[0039] The technical solution of the present invention forms an outer flow channel of the motor through the motor housing and the stator core, and the coolant can flow into the first merge ring and the second merge ring through the liquid inlet and the outer flow channel. In the process of flowing through the outer flow channel, the coolant will contact the housing and the stator core that constitute the outer flow channel, and take away the heat on the surface of the housing and the stator core, thereby achieving cooling of the housing and the stator core. After the stator core is cooled, the coolant can flow into the first merge ring and the second merge ring through the second outer flow channel, thereby completing the cooling of the first winding part and the second winding part in the first merge ring and the second merge ring. In this way, while completing the cooling of the winding, the cooling of the housing and the stator core is also taken into account, thereby improving the cooling effect of the coolant on the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A cross-sectional view of a first embodiment of a motor provided by the present invention;

[0042] Figure 2 for Figure 1A schematic diagram of the three-dimensional structure of an embodiment of a stator core;

[0043] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of another embodiment of the stator core;

[0044] Figure 4 for Figure 1 A schematic diagram of the position structure of the middle liquid inlet and the second outer flow channel in the installation cavity;

[0045] Figure 5 for Figure 1 A schematic diagram of the positions of the second outer flow channel and the first liquid outlet at the first confluence ring;

[0046] Figure 6 for Figure 1 A schematic diagram of the positions of the second outer flow channel and the second liquid outlet at the second confluence ring;

[0047] Figure 7 for Figure 1 A cross-sectional view of a second embodiment of the motor;

[0048] Figure 8 for Figure 1 A cross-sectional view of a third embodiment of the motor;

[0049] Fig. 9 for Figure 1 A cross-sectional view of a fourth embodiment of a motor.

[0050] Description of reference numerals:

[0051] 100-motor;

[0052] 1-housing, 11-installation cavity, 12-liquid inlet;

[0053] 2- stator core;

[0054] 3-winding, 31-first winding portion, 32-second winding portion;

[0055] 4-first confluence ring, 41-first confluence space, 42-first liquid outlet;

[0056] 5-second confluence ring, 51-second confluence space, 52-second liquid outlet;

[0057] 6-outer flow channel, 61-first outer flow channel, 611-groove, 612-protrusion, 613-first protrusion circle, 6131-first protrusion, 614-second protrusion circle, 6141 second protrusion, 62-second outer flow channel;

[0058] 7- the third external flow channel;

[0059] 8-Inner flow channel. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0062] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more of the related listed items.

[0063] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0064] The present invention provides a vehicle, which can be a fuel vehicle, an electric vehicle, or a hybrid vehicle. The vehicle can be a car, a truck, or a forklift, which is not limited by the present invention.

[0065] The vehicle includes a vehicle body, wheels, and a power assembly. The vehicle body serves as a supporting frame of the vehicle and is used to support and connect various parts of the vehicle. The wheels are rotatably connected to the vehicle, and the number of wheels can be set to two, three, or four, which is not limited in the present invention.

[0066] The powertrain is housed in the vehicle body and is connected to the wheels through axles. The powertrain is used to drive the wheels to rotate, thereby driving the vehicle to move. The powertrain includes a motor and a reducer. The motor is the power source of the powertrain and is used to provide power for the rotation of the wheels. The reducer is connected between the motor and the wheels. The reducer is used to control the torque of the motor acting on the wheels, thereby controlling the wheel speed and ultimately controlling the vehicle's travel speed.

[0067] The vehicle further includes a cooling device, which includes a hydraulic pump, a radiator, and a pipeline. The hydraulic pump, the radiator, and the motor are interconnected through the pipeline. A coolant flows in the pipeline, and the coolant may be cooling water or cooling oil, which is not limited in the present invention. The coolant may circulate between the motor and the radiator under the drive of the hydraulic pump, thereby realizing a cooling cycle for the motor.

[0068] Please refer to Figure 1 The motor 100 includes a housing 1, a rotor and a stator. The housing 1 is used as a supporting frame of the motor 100 to support and connect the various parts of the motor 100. The housing 1 can be rectangular, square, or other regular or irregular shapes, which is not limited by the present invention. The housing 1 is formed with a mounting cavity 11.

[0069] The stator is arranged in the installation cavity 11, and the stator includes a stator core 2 and a winding 3. The stator core 2 is fixedly connected to the cavity wall of the installation cavity 11, and the stator core 2 has a first end face and a second end face that are arranged opposite to each other in the axial direction. Stator slots are arranged in the stator core 2, and the winding 3 is installed in the stator slots. The winding 3 has a first winding portion 31 protruding from the first end face and a second winding portion 32 protruding from the second end face. The winding 3 is connected to an external circuit through the first winding portion 31 and the second winding portion 32 to convert the electrical energy of the external circuit into magnetic energy and generate a first magnetic field.

[0070] The rotor is rotatably arranged in the stator, and the rotor includes a rotating shaft and a permanent magnet. The rotating shaft is rotatably arranged in the installation cavity 11, and at least one end of the rotating shaft protrudes outside the housing 1 to be connected to the reducer. The permanent magnet is sleeved on the rotating shaft, and the permanent magnet is used to generate a second magnetic field that can interact with the first magnetic field, thereby driving the rotating shaft to rotate.

[0071] During operation of the motor 100, the winding 3 of the motor 100, especially the first winding part 31 and the second winding part 32 of the winding 3 connected to the external circuit, generates a large amount of heat, which may affect the normal use of the motor 100. To cool the motor 100, the housing 1 of the motor 100 is provided with a liquid inlet 12, which is connected to the mounting cavity 11.

[0072] The motor 100 also includes a first slip ring 4 and a second slip ring 5. The first slip ring 4 is arranged on one side of the first end face of the stator core 2, and the second slip ring 5 is arranged on one side of the second end face of the stator core 2. The area between the first slip ring 4 and the first end face forms a first slip space 41, and the area between the second slip ring 5 and the second end face forms a second slip space 51. The first winding portion 31 is arranged in the first slip space 41, and the second winding portion 32 is arranged in the second slip space 51.

[0073] In the related technology, the cooling liquid can flow into the first confluence space and the second confluence space from the liquid inlet, and under the confluence effect of the first confluence space and the second confluence space, the first winding part arranged in the first confluence space and the second winding part arranged in the second confluence space are wetted, thereby reducing the temperature of the first winding part and the second winding part and improving the stability of the motor operation.

[0074] However, this heat dissipation method can only achieve heat dissipation for the winding 3, but lacks effective heat dissipation means for the stator core 2 and the motor housing where heat is also accumulated.

[0075] To solve the above problems, in the technical solution of the present invention, the motor 100 also includes an outer flow channel 6, which is arranged between the stator core 2 and the cavity wall of the installation cavity 11, and the liquid inlet 12 is connected to the outer flow channel. The technical solution of the present invention forms the outer flow channel 6 of the motor 100 through the housing 1 of the motor 100 and the stator core 2, and the coolant can flow into the first merge ring 4 and the second merge ring 5 through the liquid inlet 12 and the outer flow channel 6. In the process of the coolant flowing through the outer flow channel 6, the coolant will contact the housing 1 and the stator core 2 constituting the outer flow channel 6, and take away the heat on the surface of the housing 1 and the stator core 2, so as to achieve cooling of the housing 1 and the stator core 2. After the cooling of the stator core 2 is completed, the coolant flows into the first merge ring 4 and the second merge ring 5, thereby completing the cooling of the first winding part 31 and the second winding part 32 in the first merge ring 4 and the second merge ring 5. In this way, the temperature of the housing 1 and the stator core 2 is lowered while the temperature of the winding 3 is lowered, thereby improving the cooling effect of the coolant on the motor 100 .

[0076] Hereinafter, the cooling channel of the motor 100 of the present invention will be described in detail with reference to the accompanying drawings.

[0077] The motor 100 has a liquid inlet 12, a first confluence space 41 and a second confluence space 51. The liquid inlet 12 is formed on the housing 1. One end of the liquid inlet 12 is connected to the hydraulic pump, and the other end is connected to the mounting cavity 11. Coolant can flow into the motor 100 from the liquid inlet 12.

[0078] The first confluence space 41 is formed between the first confluence ring 4 and the first end face, and the second confluence space 51 is formed between the second confluence ring 5 and the second end face. The first confluence space 41 accommodates the first winding portion 31, and the second confluence space 51 accommodates the second winding portion 32. The coolant can flow into the first confluence space 41 and the second confluence space 51 from the liquid inlet 12. The first confluence space 41 and the second confluence space 51 are used to converge the coolant, thereby increasing the contact area between the coolant and the first winding portion 31 and the second winding portion 32, extending the contact time between the coolant and the first winding portion 31 and the second winding portion 32, and improving the cooling effect of the coolant on the first winding portion 31 and the second winding portion 32.

[0079] The motor 100 also has an outer flow channel 6, which is formed by the cavity wall of the mounting cavity 11 of the housing 1 and the outer peripheral surface of the stator core 2. The outer flow channel 6 is connected with the liquid inlet 12, the first confluence space 41 and the second confluence space 51. The coolant can flow into the first confluence space 41 and the second confluence space 51 through the liquid inlet 12 and the outer flow channel 6. In the process of the coolant flowing through the outer flow channel 6, the coolant can contact the stator core 2 and the housing 1 constituting the outer flow channel 6, and take away the heat of the stator core 2 and the housing 1, reduce the temperature of the housing 1 and the stator core 2, and achieve heat dissipation for the housing 1 and the stator core 2 of the motor 100.

[0080] The outer flow channel 6 can be arranged along the axial extension of the stator core 2, or can be arranged along the circumferential and axial extension of the stator core 2 at the same time, and the present application does not limit this. In one embodiment of the present application, the outer flow channel 6 includes a first outer flow channel 61 and a second outer flow channel 62, the first outer flow channel 61 is arranged along the circumferential extension of the stator core 2, and the second outer flow channel 62 is arranged along the axial extension of the stator core 2; the liquid inlet 12 is connected to the second outer flow channel 62 via the first outer flow channel 61; the second outer flow channel 62 is connected to the first confluence space 41 and the second confluence space 51. The staggered arrangement of the first outer flow channel 61 and the second outer flow channel 62 increases the complexity of the flow path of the coolant in the motor 100, increases the contact area between the coolant and the stator core 2 and the housing 1, improves the uniformity of the coolant's heat dissipation for the motor 100, and improves the heat dissipation effect of the coolant on the motor 100.

[0081] Please refer to Figure 2There are many ways to form the first outer flow channel 61. The first outer flow channel 61 can be formed by the stator core 2 being recessed toward the side of the cavity wall away from the installation cavity 11, or by the cavity wall of the installation cavity 11 being recessed toward the side away from the stator core 2. The present invention does not limit this. In one embodiment of the present invention, the outer peripheral surface of the stator core 2 is recessed inward to form a groove 611, and the groove 611 and the cavity wall of the installation cavity 11 are surrounded to form the first outer flow channel 61. With such a configuration, on the one hand, it can be avoided to open the groove 611 on the shell 1, which affects the supporting strength of the shell 1. On the other hand, the groove 611 can increase the contact area between the coolant and the stator core 2, thereby improving the cooling effect of the coolant on the stator core 2.

[0082] In one embodiment of the present invention, the groove 611 is arranged around the circumference of the stator core 2, so that the coolant can flow along the entire circumference of the stator core 2, thereby increasing the contact area between the coolant and the stator core 2 and improving the cooling effect of the coolant on the stator core 2.

[0083] Please refer to Figure 3 In one possible implementation mode of the present application, a plurality of protrusions 612 are provided on the outer peripheral surface of the stator core 2, and the plurality of protrusions 612 are provided in the first outer flow channel 61. The protrusions 612 are used to divert the coolant, thereby increasing the disturbance of the coolant flowing in the first outer flow channel 61, improving the formation of turbulence in the first outer flow channel 61, increasing the contact area between the coolant and the stator core 2, and improving the heat dissipation effect of the coolant on the stator core 2.

[0084] In one embodiment of the present invention, the protrusion 612 includes a first protrusion ring 613 and a second protrusion ring 614 arranged axially along the stator core 2, the first protrusion ring 613 includes a plurality of first protrusions 6131 spaced apart along the circumferential direction of the stator core 2; the second protrusion ring 614 includes a plurality of second protrusions 6141 spaced apart along the circumferential direction of the stator core 2; the first protrusions 6131 in the first protrusion ring 613 and the second protrusions 6141 in the second protrusion ring 614 are arranged in a staggered manner. The staggered arrangement of the first protrusions 6131 and the second protrusions 6141 can more effectively destroy the laminar flow state of the coolant flow, so that more complex turbulence is generated in the coolant, thereby enhancing the rate and efficiency of heat transfer of the coolant.

[0085] Please refer to Figure 1The second outer flow channel 62 is formed between the stator core 2 and the cavity wall of the installation cavity 11. The second outer flow channel 62 can be formed by a depression of the stator core 2 or by a depression of the cavity wall of the installation cavity 11, and the present invention does not limit this. The second outer flow channel 62 has a first end and a second end that are arranged opposite to each other, and a third end that is arranged between the first end and the second end. The first end of the second outer flow channel 62 is connected to the first confluence space 41, the second end of the second outer flow channel 62 is connected to the second confluence space 51, and the third end of the second outer flow channel 62 is connected to the first outer flow channel 61. The second outer flow channel 62 is used to guide the coolant of the first outer flow channel 61 to the first confluence space 41 and the second confluence space 51, so as to realize the cooling of the first winding part 31 and the second winding part 32 in the first confluence space 41 and the second confluence space 51.

[0086] In one embodiment of the present invention, the liquid inlet 12 is provided on one side of the installation cavity 11 along the first direction, and the second outer flow channel 62 is provided on the other side of the installation cavity 11 along the first direction. The first direction can be the front-to-back direction, the left-to-right direction, or the up-down direction, and the present invention does not limit this. Exemplarily, in the present invention, the first direction is the up-down direction, the liquid inlet 12 is connected to the upper cavity wall of the installation cavity 11, and the second outer flow channel 62 is provided at the lower cavity wall of the installation cavity 11. In this way, the distance between the liquid inlet 12 and the second outer flow channel 62 is extended to the greatest extent, thereby extending the flow distance of the coolant along the first outer flow channel 61, increasing the contact area between the coolant and the stator core 2, and improving the cooling effect of the coolant on the stator core 2.

[0087] In one embodiment of the present invention, the first outer flow channel 61 is connected with the middle part of the second outer flow channel 62. The first outer flow channel 61 is connected with the middle part of the second outer flow channel 62. It should be noted that it is assumed that the distance from the axis of the connecting port of the first outer flow channel 61 and the second outer flow channel 62 to the first convergence ring 4 facing the first outer flow channel 61 is D, and the distance from the axis of the connecting port of the first outer flow channel 61 and the second outer flow channel 62 to the second convergence ring 5 facing the first outer flow channel 61 is E. When the absolute value of DE is 0≤|DE|≤2mm, it means that the first outer flow channel 61 is connected with the middle part of the second outer flow channel 62. At this time, the coolant flow rate flowing into the first confluence space 41 and the second confluence space 51 through the first outer flow channel 61 and the second outer flow channel 62 can be regarded as equal, so as to improve the uniformity of the coolant in the first confluence space 41 and the second confluence space 51, improve the uniformity of the heat dissipation of the coolant for the first winding portion 31 and the second winding portion 32, and improve the heat dissipation effect of the coolant on the first winding portion 31 and the second winding portion 32.

[0088] It can be understood that the second outer flow channel 62 can be formed at various positions in the mounting cavity 11, and in order to improve the heat dissipation effect of the coolant on the motor 100, please refer to Figure 4 In one possible implementation mode of the present application, the liquid inlet 12 is connected to the first position of the mounting cavity 11; the second outer flow channel 62 is provided at the second position of the mounting cavity 11, and the arc of the first position and the second position in the circumferential direction of the mounting cavity 11 is A, 8π / 9≤A≤8π / 7. Under this position size restriction, the positions of the liquid inlet 12 and the second outer flow channel 62 in the mounting cavity 11 are diagonally or nearly diagonally arranged. After the coolant flows into the mounting cavity 11 through the liquid inlet 12, the coolant needs to flow through the entire mounting cavity 11 before it can flow into the first confluence space 41 and the second confluence space 51 through the second outer flow channel 62. In this way, the residence time of the coolant in the mounting cavity 11 is increased, and the cooling effect of the coolant on the housing 1 and the stator core 2 is improved.

[0089] The motor 100 further includes a first liquid outlet 42 and a second liquid outlet 52, wherein the first liquid outlet 42 is disposed in the first confluence space 41, and the second liquid outlet 52 is disposed in the second confluence space 51. The coolant can flow into the first confluence space 41 from the liquid inlet 12 and the outer flow channel 6, and then flow out of the motor 100 from the first liquid outlet 42. The coolant can also flow into the first confluence space 41 from the liquid inlet 12 and the outer flow channel 6, and then flow out of the motor 100 from the first liquid outlet 42. The provision of the first liquid outlet 42 and the second liquid outlet 52 can speed up the discharge of the coolant, improve the uniformity of the coolant flowing in the first confluence space 41 and the second confluence space 51, and improve the cooling effect of the coolant on the motor 100.

[0090] Please refer to Figure 5 In order to improve the cooling effect on the winding 3, in one embodiment of the present application, the second outer flow channel 62 is connected to the third position of the first confluence space 41, and the first liquid outlet 42 is set at the fourth position of the first confluence space 41; the third position and the fourth position are arranged at intervals along the circumference of the first confluence space 41, and the arc of the circumferential line connecting the third position and the fourth position along the first confluence space 41 is B, 8π / 9≤B≤8π / 7. Under this position size restriction, the relative positions of the second outer flow channel 62 and the first liquid outlet 42 in the first confluence space 41 can be set diagonally or nearly diagonally. After the coolant flows into the first confluence space 41 from the second outer flow channel 62, the coolant needs to flow through the entire first confluence space 41 before it can flow out of the first confluence space 41 from the first liquid outlet 42, so as to increase the retention time of the coolant in the first confluence space 41 and improve the cooling effect of the coolant on the first winding part 31.

[0091] Please refer to Figure 6, correspondingly, in another possible implementation of the present application, the second outer flow channel 62 is connected to the fifth position of the second confluence space 51; the second liquid outlet 52 is arranged at the sixth position of the second confluence space 51; the fifth position and the sixth position are arranged at intervals along the circumference of the second confluence space 51, and the arc of the line connecting the fifth position and the sixth position along the circumference of the first confluence space 41 is C, 8π / 9≤C≤8π / 7. Under this position size restriction, the relative positions of the second outer flow channel 62 and the second liquid outlet 52 in the second confluence space 51 can be arranged diagonally or nearly diagonally. After the coolant flows into the second confluence space 51 from the second outer flow channel 62, the coolant needs to flow through the entire second confluence space 51 before it can flow out of the second confluence space 51 from the second liquid outlet 52, so as to increase the retention time of the coolant in the second confluence space 51 and improve the cooling effect of the coolant on the second winding part 32.

[0092] Please refer to Figure 7 The motor 100 also has a third outer flow channel 7, which is arranged to extend along the axial direction of the stator core 2. The third outer flow channel 7 and the second outer flow channel 62 are arranged at intervals along the circumferential direction of the stator core 2, and the liquid inlet 12 is also connected to the first confluence space 41 through the third outer flow channel 7. The third outer flow channel 7 is used to introduce the coolant into the first confluence space 41 from the side away from the second outer flow channel 62. In this way, the contact area between the coolant and the stator core 2 is increased, and the cooling effect of the coolant on the stator core 2 is improved.

[0093] There are many ways to form the third outer flow channel 7 of the motor 100. In one embodiment of the present invention, the stator core 2 is spaced apart from the cavity wall of the installation cavity 11, and the outer peripheral surface of the stator core 2 and the inner wall surface of the installation cavity 11 of the housing 1 are arranged to form the third outer flow channel 7. In this way, on the one hand, the stator core 2 is spaced apart from the cavity wall of the installation cavity 11, which can reduce the difficulty of installing the stator core 2 and the installation cavity 11 and improve the assembly efficiency of the stator core 2 and the housing 1. On the other hand, when the coolant flows from the third outer flow channel 7 into the first confluence space 41, the coolant can contact the housing 1 and the stator core 2 at the same time, and take away the heat of the housing 1 and the stator core 2 at the same time, thereby improving the heat dissipation efficiency of the coolant for the motor 100.

[0094] In another embodiment of the present invention, the third outer flow channel 7 can also be formed by the shell 1 alone. Specifically, in this embodiment, the shell 1 has an interlayer, which constitutes the third outer flow channel 7, and the third outer flow channel 7 and the installation cavity 11 are arranged at intervals. In this way, on the one hand, since the third outer flow channel 7 is arranged at intervals from the installation cavity 11, an independent heat dissipation channel is formed. This means that when the coolant flows through the third outer flow channel 7, it can focus on the heat dissipation of the shell 1 without being disturbed by other components in the installation cavity 11, thereby improving the heat dissipation efficiency of the shell 1. On the other hand, since there is no need to set a gap between the shell 1 and the stator core 2 to form the third outer flow channel 7, under this structure, the inner wall surface of the shell 1 and the stator core 2 can be completely fitted, thereby reducing the structural weakening caused by the gap or void between the stator core 2 and the shell 1, thereby enhancing the structural strength of the shell 1. At the same time, the fitting arrangement of the shell 1 and the stator core 2 also reduces the thermal resistance between the shell 1 and the stator core 2 in disguised form. The heat generated by the stator core 2 can be more effectively transferred to the housing 1 and quickly dissipated through the coolant in the third outer flow channel 7, thereby improving the heat dissipation performance of the motor 100.

[0095] Please refer to Figure 8 In one embodiment of the present invention, the liquid inlet 12 is also connected to the second confluence space 51 via the third outer flow channel 7, so as to further increase the contact area between the coolant and the stator core 2 and improve the cooling effect of the coolant on the stator core 2.

[0096] Please refer to Fig. 9 The motor 100 further comprises an inner flow channel 8, wherein the inner flow channel 8 penetrates the stator core 2 along the axial direction of the stator core 2, one end of the inner flow channel 8 is connected to the first confluence space 41, and the other end of the inner flow channel 8 is connected to the second confluence space 51. The inner flow channel 8 is used to interconnect the first confluence space 41 and the second confluence space 51, so as to balance the coolant flow of the first confluence space 41 and the second confluence space 51, improve the uniformity of the heat dissipation of the coolant to the first winding portion 31 and the second winding portion 32, and improve the heat dissipation effect of the coolant.

[0097] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0098] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A motor, characterized in that: include: A housing, wherein the housing is formed with a liquid inlet and a mounting cavity, and the liquid inlet is connected to the mounting cavity; A stator core is disposed in the installation cavity, the stator core having a first end face and a second end face which are axially opposite to each other, and an outer flow channel is formed between the stator core and the cavity wall of the installation cavity; A winding, provided on the stator core, the winding having a first winding portion protruding from the first end surface and a second winding portion protruding from the second end surface; A first slip ring is provided at one side of the first end surface, the area between the first slip ring and the first end surface forms a first slip space, and the first winding portion is accommodated in the first slip space; The second convergence ring is arranged on one side of the second end face, the area between the second convergence ring and the second end face forms a second convergence space, and the second winding part is accommodated in the second convergence space; the liquid inlet is connected to the first convergence space and the second convergence space via the external flow channel.

2. The motor according to claim 1, characterized in that The outer flow channel includes a first outer flow channel and a second outer flow channel, the liquid inlet is connected to the second outer flow channel via the first outer flow channel; the second outer flow channel is connected to the first confluence space and the second confluence space; The first outer flow channel is extended along the circumferential direction of the stator core, and the second outer flow channel is extended along the axial direction of the stator core.

3. The motor according to claim 2, characterized in that The outer circumference of the stator core is recessed inward to form a groove, and the groove and the cavity wall of the installation cavity are arranged to form the first outer flow channel; the groove is arranged around the circumference of the stator core.

4. The motor according to claim 3, characterized in that A plurality of protrusions are provided on the outer peripheral surface of the stator core, and the plurality of protrusions are arranged in the first outer flow channel, and the protrusions are used to divert the coolant.

5. The motor according to claim 4, characterized in that The multiple protrusions include a first protrusion ring and a second protrusion ring arranged axially along the stator core, the first protrusion ring includes a plurality of first protrusions spaced apart along the circumferential direction of the stator core; the second protrusion ring includes a plurality of second protrusions spaced apart along the circumferential direction of the stator core; the first protrusions in the first protrusion ring and the second protrusions in the second protrusion ring are staggered.

6. The motor according to claim 2, characterized in that The liquid inlet is connected to the first position of the installation cavity; the second outer flow channel is arranged at the second position of the installation cavity; The arc angle between the first position and the second position in the circumferential direction of the installation cavity is A, and 8π / 9≤A≤8π / 7.

7. The motor according to claim 1, characterized in that The first confluence space is provided with a first liquid outlet, and the second confluence space is provided with a second liquid outlet.

8. The motor according to claim 7, characterized in that The outer flow channel is connected to a third position of the first confluence space; The first liquid outlet is arranged at the fourth position of the first confluence space; the third position and the fourth position are arranged at intervals along the circumference of the first confluence space, and the arc of the circumferential line connecting the third position and the fourth position along the first confluence space is B, 8π / 9≤B≤8π / 7.

9. The motor according to claim 7, characterized in that The outer flow channel is connected to a fifth position of the second confluence space; The second liquid outlet is arranged at the sixth position of the second confluence space; the fifth position and the sixth position are arranged at intervals along the circumference of the second confluence space, and the arc of the circumferential line connecting the fifth position and the sixth position along the first confluence space is C, 8π / 9≤C≤8π / 7.

10. The motor according to claim 2, characterized in that The motor also includes a third outer flow channel, which is extended along the axial direction of the stator core. The third outer flow channel and the second outer flow channel are spaced apart along the circumferential direction of the stator core. The liquid inlet is also connected to the first confluence space via the third outer flow channel.

11. The motor according to claim 10, characterized in that The liquid inlet is also connected to the second confluence space via the third external flow channel.

12. The motor according to claim 1, characterized in that An inner flow channel is provided in the stator core, and the inner flow channel penetrates the stator core along the axial direction of the stator core; One end of the inner flow channel is connected to the first confluence space, and the other end of the inner flow channel is connected to the second confluence space.

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

14. A vehicle, characterized in that: Comprising the powertrain as claimed in claim 13.

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