Motor, power assembly and vehicle

Abstract

The invention discloses a motor, a power assembly and a vehicle, the motor comprises a stator core and a first oil collecting piece, and the stator core is provided with a cooling channel and a winding; the first oil collecting piece is arranged on one side of the stator iron core in the axial direction, a first cooling cavity is formed in the area between the first oil collecting piece and the side of the stator iron core in the axial direction, and the first cooling cavity accommodates the winding; the first cooling cavity is isolated from the cooling channel, and the cooling channel and the first cooling cavity are suitable for being communicated with the oil supply component. In the application, the cooling channel is arranged on the stator iron core, the first cooling cavity is formed in the area between the first oil collecting piece and the stator iron core along the axial side, the first cooling cavity and the cooling channel are isolated from each other, and the cooling channel and the first cooling cavity are suitable for being communicated with the oil supply component respectively. Therefore, the cooling liquid in the cooling channel and the cooling liquid in the first cooling cavity are independent, and the cooling effect on the stator core and the winding is improved.

Description

Technical Field

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

[0002] In hybrid vehicles or pure electric vehicles, the motor is the power source of the vehicle, and the performance and safety of the motor are crucial. The motor includes a motor stator and a motor rotor. The motor stator is the stationary part of the motor. The motor stator includes a stator core and a stator winding. The stator core is used to form a magnetic flux path and embed the stator winding. The stator winding can be supplied with current to generate a magnetic field; due to the magnetic field, the motor rotor rotates inside the motor stator to drive the vehicle.

[0003] The stator core of the motor is generally made of silicon steel stampings with a high silicon content, which are stacked in groups. Losses will be generated during the operation of the motor. These losses will serve as a heat source to heat the motor components. When the stator winding is energized, heat will also be generated, causing the motor temperature to rise, thereby affecting the performance of the motor.

[0004] In the prior art, when the stator core and the stator winding are cooled by immersing them in a cooling medium, the stator core and the stator winding are in the same cooling channel, and the coolant flows through the stator core and the stator winding successively, resulting in uneven cooling of the stator core and the stator winding, and poor overall cooling effect of the motor. Summary of the invention

[0005] The purpose of the present application is to provide a motor, a powertrain and a vehicle to solve the problem of poor motor cooling effect.

[0006] To achieve the purpose of this application, this application provides the following technical solutions:

[0007] In a first aspect, the present application provides a motor, comprising:

[0008] A stator core, wherein the stator core is provided with a cooling channel and a winding;

[0009] A first oil collecting member is provided on one side of the stator core along the axial direction, and a first cooling cavity is formed in an area between the first oil collecting member and the one side of the stator core along the axial direction, and the first cooling cavity accommodates the winding;

[0010] The first cooling cavity and the cooling channel are isolated from each other, and the cooling channel and the first cooling cavity are suitable for being connected to the oil supply component respectively.

[0011] In one embodiment, the motor further includes a casing, the stator core is accommodated in the casing, and the cooling channel is formed between an outer peripheral wall of the stator core and an inner wall of the casing.

[0012] In one embodiment, a first protrusion and a second protrusion are convexly provided on the outer peripheral wall of the stator core, an end of the first protrusion away from the outer peripheral wall is tightly connected to the inner wall of the casing, and an end of the second protrusion away from the outer peripheral wall is tightly connected to the inner wall of the casing;

[0013] The first protrusion and the second protrusion are spaced apart in the axial direction of the stator core, the first protrusion, the second protrusion, the outer peripheral wall and the inner wall of the casing form the cooling channel, and the first protrusion or the second protrusion separates the cooling channel and the first cooling cavity.

[0014] In one embodiment, the first protrusion is arranged around the circumference of the stator core, and the second protrusion is arranged around the circumference of the stator core.

[0015] In one embodiment, the first oil collecting member is connected to the inner wall of the casing and a side wall of the stator core along the axial direction to form the first cooling cavity.

[0016] In one embodiment, the casing is provided with a first oil inlet hole, a second oil inlet hole, a first oil outlet hole, and a second oil outlet hole, the cooling channel is connected with the first oil inlet hole and the first oil outlet hole, and the first cooling cavity is connected with the second oil inlet hole and the second oil outlet hole; the cooling channel is suitable for being connected with the oil supply component through the first oil inlet hole, and the first cooling cavity is suitable for being connected with the oil supply component through the second oil inlet hole.

[0017] In one embodiment, the first oil inlet hole and the second oil inlet hole are spaced apart in the axial direction of the stator core, and the first oil outlet hole and the second oil outlet hole are spaced apart in the axial direction of the stator core.

[0018] In one embodiment, the first oil inlet hole and the first oil outlet hole are arranged at intervals in the circumferential direction of the stator core, and the second oil inlet hole and the second oil outlet hole are arranged at intervals in the circumferential direction of the stator core.

[0019] In one embodiment, the motor further includes a second oil collecting member, and a second cooling cavity is formed between the second oil collecting member and the area between the stator core and one side axially away from the first oil collecting member, and the second cooling cavity is isolated from the cooling channel and the first cooling cavity.

[0020] In one embodiment, the casing is further provided with a third oil inlet hole and a third oil outlet hole, and the second cooling cavity is connected with the third oil inlet hole and the third oil outlet hole; the second cooling cavity is suitable for being connected with the oil supply component through the third oil inlet hole.

[0021] In one embodiment, the first oil inlet hole, the second oil inlet hole and the third oil inlet hole are arranged at intervals in the axial direction of the stator core, and the first oil inlet hole is arranged between the second oil inlet hole and the third oil inlet hole;

[0022] The first oil outlet hole, the second oil outlet hole and the third oil outlet hole are arranged at intervals in the axial direction of the stator core, and the first oil outlet hole is arranged between the second oil outlet hole and the third oil outlet hole.

[0023] In one embodiment, the first end of the winding is accommodated in the first cooling cavity, and the second end of the winding is accommodated in the second cooling cavity.

[0024] In one embodiment, the stator core includes a core body and a lug protruding from the outer periphery of the core body, and a gap is formed between the outer periphery of the lug and the inner wall of the casing;

[0025] The second oil collecting member includes a first ring body and a second ring body, the second ring body is sleeved on the first ring body, the first ring body is connected to a side wall of the core body along the axial direction and forms the second cooling cavity, the outer periphery of the support ear and the inner wall of the housing, the second ring body and a side wall of the core body along the axial direction of the stator core form the cooling channel, and the second ring body separates the cooling channel and the second cooling cavity.

[0026] In one embodiment, the first oil collecting member includes a third ring body and a fourth ring body, the axial first end of the third ring body is connected to an axial side wall of the stator core, the fourth ring body is sleeved on the axial second end of the third ring body, the fourth ring body and an axial side wall of the stator core have a gap, the fourth ring body is connected to the inner wall of the casing at the radial outer edge of the stator core, the third ring body, the fourth ring body and the inner wall of the casing form the first cooling cavity, and the fourth ring body is provided with a fourth oil outlet hole connected to the first cooling cavity.

[0027] In one embodiment, the motor further includes a first seal, wherein the first seal is connected between an axial first end of the third ring body and an axial side wall of the stator core.

[0028] In one embodiment, the motor further includes a second seal, which is connected between an outer edge of the fourth ring body in the radial direction of the stator core and an inner wall of the housing.

[0029] In a second aspect, the present application also provides a powertrain, comprising the motor as described in the first aspect.

[0030] In a third aspect, the present application further provides a vehicle, comprising the motor as described in the first aspect or the powertrain as described in the second aspect.

[0031] In the present application, a cooling channel is provided on the stator core, and a first cooling cavity is formed in the area between the first oil collecting member and one side of the stator core along the axial direction. The first cooling cavity and the cooling channel are isolated from each other, and the cooling channel and the first cooling cavity are suitable for being connected to the oil supply component respectively, thereby realizing the independence of the coolant in the cooling channel and the first cooling cavity, and improving the cooling effect on the stator core and the winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A side view of a motor according to an embodiment of the present application;

[0034] Figure 2 for Figure 1 AA section view;

[0035] Figure 3 for Figure 1 BB cross-sectional view;

[0036] Figure 4 A cross-sectional view of a stator core and a stator winding according to an embodiment of the present application;

[0037] Figure 5 A side view of a first oil collecting member according to an embodiment of the present application;

[0038] Figure 6 A side view of a motor according to an embodiment of the present application;

[0039] Figure 7 A side view of a motor according to another embodiment of the present application;

[0040] Figure 8 for Figure 7 CC section view;

[0041] Fig. 9 A side view and DD cross-sectional view of a second oil collecting member according to an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 100, housing; 110, first oil inlet hole; 120, second oil inlet hole; 130, first oil outlet hole; 140, second oil outlet hole; 150, third oil inlet hole; 160, third oil outlet hole; 200, stator core; 220a, core body; 210, outer peripheral wall; 220, first side wall; 230, second side wall; 240, first protrusion; 250, second protrusion; 260, lug; 300, first oil collector; 310, third ring body; 3 11. first groove; 320. fourth ring body; 321. fourth oil outlet; 322. second groove; 410. cooling channel; 420. first cooling cavity; 430. second cooling cavity; 500. winding; 600. second oil collecting member; 600a. first ring body; 600b. second ring body; 610. annular plate; 611. third groove; 620. fourth groove; 710. first sealing member; 720. second sealing member; 800. bolt. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] 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.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0047] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0048] The present application provides a vehicle, which includes a powertrain and a frame. The powertrain is installed on the frame, and the powertrain provides power to the vehicle to drive the vehicle.

[0049] The powertrain includes the engine, motor, gearbox, drive shaft, differential and clutch. The engine generates power by burning fuel, while the motor converts electrical energy into mechanical energy. Both power sources can provide the required driving force for the vehicle. The clutch engages or disengages between the engine or motor and the gearbox to ensure that the power of the engine or motor can be smoothly transmitted to the gearbox, while allowing the driver to disconnect the engine or motor from the gearbox when necessary for gear shifting. Through the gearbox, the power of the engine or motor can be properly adjusted so that the vehicle can maintain the best power output at different speeds and loads. The drive shaft transfers torque from the gearbox to the wheels, thereby moving the vehicle. The differential enables the two drive wheels of the vehicle to rotate at different speeds when turning or under different road conditions, which helps maintain the stability and handling of the vehicle.

[0050] In hybrid vehicles or pure electric vehicles, the motor is the main power source of the vehicle, and the performance and safety of the motor are crucial. The motor includes a motor stator and a motor rotor. The motor stator is the stationary part of the motor. The motor stator includes a stator core and a stator winding. The stator core is used to form a magnetic flux path and embed the stator winding. The stator winding can be supplied with current to generate a magnetic field; due to the magnetic field, the motor rotor rotates inside the motor stator to drive the vehicle. In addition, the motor can also be used in suspension systems, electric seats and other components.

[0051] The stator core of the motor is generally made of silicon steel stampings with a high silicon content, which are stacked in groups. Losses will be generated during the operation of the motor. These losses will serve as a heat source to heat the motor components. When the stator winding is energized, heat will also be generated, causing the motor temperature to rise, thereby affecting the performance of the motor.

[0052] In the prior art, when the stator core and the stator winding are cooled by immersing them in a cooling medium, the stator core and the stator winding are in the same cooling channel, and the coolant flows through the stator core and the stator winding successively, resulting in uneven cooling of the stator core and the stator winding, and poor overall cooling effect of the motor.

[0053] refer to Figure 1 , Figure 2 and Figure 3The present application provides a motor, which includes a housing 100, a stator core 200, a first oil collecting member 300 and a winding 500. The housing 100 is provided with a first oil inlet hole 110, a second oil inlet hole 120, a first oil outlet hole 130 and a second oil outlet hole 140. The first oil inlet hole 110 and the second oil inlet hole 120 are both connected to the oil supply component, the first oil outlet hole 130 and the second oil outlet hole 140 can be both connected to the oil supply component, or the first oil outlet hole 130 and the second oil outlet hole 140 are both connected to other components of the powertrain. The housing 100 serves as the outer shell of the motor as a whole, and can also be used to accommodate other components of the powertrain. The oil supply component is arranged outside the housing 100, or the oil supply component is located inside the housing 100 and connected to other components of the powertrain. The stator core 200 is accommodated in the casing 100, and at least a portion of the outer peripheral wall 210 of the stator core 200 has a gap with the inner wall of the casing 100. The outer peripheral wall 210 having a gap with the inner wall of the casing 100 and the inner wall of the casing 100 form a cooling channel 410. The cooling channel 410 is connected to the first oil inlet hole 110 and the first oil outlet hole 130 to realize oil inlet and oil discharge of the cooling channel 410. The first oil collecting member 300 is arranged on one side of the stator core 200 along the axial direction, and the area between the first oil collecting member 300 and the one side of the stator core 200 along the axial direction forms a first cooling cavity 420. The first cooling cavity 420 is connected to the second oil inlet hole 120 and the second oil outlet hole 140 to realize the oil inlet and oil discharge of the first cooling cavity 420. The cooling channel 410 and the first cooling cavity 420 are isolated from each other to realize the oil inlet and oil discharge of the cooling channel 410 and the oil inlet and oil discharge of the first cooling cavity 420 are relatively independent; the winding 500 is arranged on the stator core 200, and at least part of the winding 500 is accommodated in the first cooling cavity 420.

[0054] The cooling channel 410 can cool the stator core 200, and the cooling channel 410 takes in oil through the first oil inlet hole 110 and discharges oil through the first oil outlet hole 130. The winding 500 of the motor is arranged on the stator core 200, and the first cooling cavity 420 can cool the winding 500 located on one side of the stator core 200 along the axial direction, and the first cooling cavity 420 takes in oil through the second oil inlet hole 120 and discharges oil through the second oil outlet hole 140, and the first cooling cavity 420 is isolated from the cooling channel 410, so as to realize the independence of the coolant in the cooling channel 410 and the first cooling cavity 420, and improve the cooling effect of the stator core 200 and the winding 500.

[0055] refer to Figure 2 and Figure 4The stator core 200 is provided with stator slots extending in the axial direction of the stator core 200, and the winding 500 is inserted in the stator slots. The stator core 200 includes a radial outer peripheral wall 210 and a first side wall 220 and a second side wall 230 on both sides of the axial direction. The stator slot penetrates the first side wall 220 and the second side wall 230, so that the first end and the second end of the winding 500 can extend out of the stator slot, and the first end of the winding 500 exceeds the first side wall 220 and is accommodated in the first accommodation slot. A portion of the outer peripheral wall 210 is tightly connected to the inner wall of the housing 100 to achieve sealing between the stator core 200 and the housing 100; another portion of the outer peripheral wall 210 has a gap with the inner wall of the housing 100, and the outer peripheral wall 210 having a gap with the inner wall of the housing 100 and the inner wall of the housing 100 form a cooling channel 410, that is, the coolant in the cooling channel 410 can directly cool the outer peripheral wall 210 of the stator core 200. The first oil collector 300 is connected to the inner wall of the housing 100, the first side wall 220 or the second side wall 230 to form a first cooling cavity 420, and the coolant in the first cooling cavity 420 can cool the winding 500. The inner wall of the casing 100 is tightly connected to the outer peripheral wall 210 of the stator core 200 to separate the cooling channel 410 and the first cooling cavity 420, so that the coolant in the cooling channel 410 and the coolant in the first cooling cavity 420 are relatively independent, thereby cooling the stator core 200 and the winding 500 separately, and the cooling effect is better.

[0056] In the motor provided in the application, a first protrusion 240 and a second protrusion 250 are convexly provided on the outer peripheral wall 210, and one end of the first protrusion 240 away from the outer peripheral wall 210 is tightly connected to the inner wall of the housing 100, and one end of the second protrusion 250 away from the outer peripheral wall 210 is tightly connected to the inner wall of the housing 100; the first protrusion 240 and the second protrusion 250 are spaced apart in the axial direction of the stator core 200, and the outer peripheral wall 210 between the first protrusion 240 and the second protrusion 250 and the inner wall of the housing 100 form a cooling channel 410, and the first protrusion 240 or the second protrusion 250 separates the cooling channel 410 and the first cooling cavity 420. By convexly providing the first protrusion 240 and the second protrusion 250 on the outer peripheral wall 210 of the stator core 200, a recessed area is formed between the first protrusion 240 and the second protrusion 250, and the recessed area and the inner wall of the housing 100 can form a cooling channel 410. The first cooling cavity 420 is located at one side of the stator core 200 in the axial direction, that is, the first protrusion 240 or the second protrusion 250 can separate the cooling channel 410 and the first cooling cavity 420 in the axial direction of the stator core 200 .

[0057] Specifically, the first protrusion 240 is arranged around the circumference of the stator core 200, and the second protrusion 250 is arranged around the circumference of the stator core 200, so as to separate the cooling channel 410 and the first cooling cavity 420 in the circumference of the stator core 200; at the same time, an annular cooling channel 410 is formed in the circumference of the stator core 200 to improve the cooling effect of the stator core 200. The first oil inlet hole 110 is arranged between the first protrusion 240 and the second protrusion 250, and one end of the first oil inlet hole 110 is communicated with the oil supply component, and the other end of the first oil inlet hole 110 is communicated with the cooling channel 410, so as to inject external coolant into the cooling channel 410. The first oil outlet hole 130 is disposed between the first protrusion 240 and the second protrusion 250. One end of the first oil outlet hole 130 is connected to the oil supply component or other components of the powertrain, and the other end of the first oil outlet hole 130 is connected to the cooling channel 410 to discharge the coolant in the cooling channel 410 to achieve the circulation of the coolant. At the same time, the cooling channel 410 and the first cooling cavity 420 are filled with coolant to immerse the outer peripheral wall 210 of the stator core 200, the first side wall 220 and the end of the winding 500, thereby increasing the heat transfer area and achieving the effect of efficiently cooling the motor.

[0058] In a possible embodiment, the inner wall of the casing 100 is recessed to form a groove, the outer peripheral wall 210 of the stator core 200 is tightly connected to the inner wall of the casing 100 on both sides of the groove, and the groove and the outer peripheral wall 210 of the stator core 200 form a cooling channel 410, which can also achieve cooling of the outer peripheral wall 210 of the stator core 200.

[0059] refer to Figure 1 , Figure 2 and Figure 3 The motor further includes a second oil collecting member 600, and the housing 100 is further provided with a third oil inlet hole 150 and a third oil outlet hole 160. The second oil collecting member 600 is provided on the side of the stator core 200 axially away from the first oil collecting member 300; the area between the second oil collecting member 600 and the side of the stator core 200 axially away from the first oil collecting member 300 forms a second cooling cavity 430, and the second cooling cavity 430 is connected with the third oil inlet hole 150 and the third oil outlet hole 160, and the second cooling cavity 430 is isolated from the cooling channel 410 and the first cooling cavity 420. Specifically, the third oil inlet hole 150 is connected with the oil supply component, and the third oil outlet hole 160 can be connected with the oil supply component or other components of the powertrain.

[0060] The second end of the winding 500 is accommodated in the second cooling cavity 430, and the first end and the second end of the winding 500 can be cooled through the first cooling cavity 420 and the second cooling cavity 430. The second cooling cavity 430 is isolated from the cooling channel 410 and the first cooling cavity 420, so that the cooling liquid for cooling the first end and the second end of the winding 500 does not flow mutually, thereby improving the cooling uniformity of the first end and the second end of the winding 500 and improving the efficiency and life of the motor.

[0061] The first oil collecting member 300 and the second oil collecting member 600 may be configured to have the same structure, thereby saving costs.

[0062] In the motor provided in the present application, the first oil inlet hole 110, the second oil inlet hole 120 and the third oil inlet hole 150 are arranged at intervals in the axial direction of the stator core 200, and the first oil inlet hole 110 is arranged between the second oil inlet hole 120 and the third oil inlet hole 150, so as to respectively enter the cooling channel 410, the first cooling cavity 420 and the second cooling cavity 430. The first oil outlet hole 130, the second oil outlet hole 140 and the third oil outlet hole 160 are arranged at intervals in the axial direction of the stator core 200, and the first oil outlet hole 130 is arranged between the second oil outlet hole 140 and the third oil outlet hole 160, so as to respectively discharge the oil from the cooling channel 410, the first cooling cavity 420 and the second cooling cavity 430, thereby forming three relatively independent cooling oil passages. Specifically, the coolant flowing into the first oil inlet hole 110, the second oil inlet hole 120 and the third oil inlet hole 150 can come from the same oil inlet channel, and the first oil inlet hole 110, the second oil inlet hole 120 and the third oil inlet hole 150 are arranged in the same axial direction of the stator core 200 so as to be connected with the same oil inlet channel. The coolant flowing out of the first oil outlet hole 130, the second oil outlet hole 140 and the third oil outlet hole 160 can be collected in the same return channel, and the first oil outlet hole 130, the second oil outlet hole 140 and the third oil outlet hole 160 are arranged in the same axial direction of the stator core 200 so as to be connected with the same return oil channel.

[0063] refer to Figure 1 , Figure 2 and Figure 3The first oil inlet hole 110 and the first oil outlet hole 130 are arranged at intervals in the circumferential direction of the stator core 200, the second oil inlet hole 120 and the second oil outlet hole 140 are arranged at intervals in the circumferential direction of the stator core 200, and the third oil inlet hole 150 and the third oil outlet hole 160 are arranged at intervals in the circumferential direction of the stator core 200. That is, the first oil inlet hole 110 and the first oil outlet hole 130 are not on the same axial direction of the stator core 200, and the first oil inlet hole 110 and the first oil outlet hole 130 have an angle θ greater than zero in the circumferential direction of the stator core 200; the second oil inlet hole 120 and the second oil outlet hole 140 are not on the same axial direction of the stator core 200, and the second oil inlet hole 120 and the second oil outlet hole 140 have an angle θ greater than zero in the circumferential direction of the stator core 200; the third oil inlet hole 150 and the third oil outlet hole 160 are not on the same axial direction of the stator core 200, and the third oil inlet hole 150 and the third oil outlet hole 160 are on the same axial direction of the stator core 200. 200 has an angle θ greater than zero in the circumferential direction, so that the coolant entering the cooling channel 410 from the first oil inlet hole 110 flows along the circumferential direction of the stator core 200 for a certain distance and then is discharged from the first oil outlet hole 130, the coolant entering the first cooling cavity 420 from the second oil inlet hole 120 flows along the circumferential direction of the stator core 200 for a certain distance and then is discharged from the second oil outlet hole 140, and the coolant entering the second cooling cavity 430 from the third oil inlet hole 150 flows along the circumferential direction of the stator core 200 for a certain distance and then is discharged from the third oil outlet hole 160, thereby improving the coolant circulation efficiency.

[0064] Optionally, θ is set to 180 degrees, so that the coolant entering the cooling channel 410 from the first oil inlet hole 110 flows uniformly from both sides of the first oil inlet hole 110 in the circumferential direction of the stator core 200 to the first oil outlet hole 130 for oil discharge, so as to perform 360-degree cooling on the stator core 200. At the same time, the coolant entering the first cooling cavity 420 from the second oil inlet hole 120 flows uniformly from both sides of the second oil inlet hole 120 in the circumferential direction of the stator core 200 to the second oil outlet hole 140 for oil discharge, so as to perform 360-degree cooling on the first end of the winding 500. The coolant entering the second cooling cavity 430 from the third oil inlet hole 150 flows uniformly from both sides of the third oil inlet hole 150 in the circumferential direction of the stator core 200 to the third oil outlet hole 160 for oil discharge, so as to perform 360-degree cooling on the second end of the winding 500.

[0065] Among them, when the motor is actually used, Figure 1 In the state shown, one end of the second oil outlet 140 connected to the first cooling cavity 420 and one end of the third oil outlet 160 connected to the second cooling cavity 430 are located in area A, so that the coolant in the first cooling cavity 420 can at least immerse a portion of the first end of the winding 500, and the coolant in the second cooling cavity 430 can at least immerse a portion of the second end of the winding 500, thereby achieving an immersion cooling effect.

[0066] refer to Figure 3 and Figure 5 The first oil collecting member 300 includes a third ring body 310 and a fourth ring body 320. The axial first end of the third ring body 310 is connected to the first side wall 220. The fourth ring body 320 is sleeved on the axial second end of the third ring body 310. There is a gap between the fourth ring body 320 and the first side wall 220. The outer edge of the fourth ring body 320 in the radial direction of the stator core 200 is connected to the inner wall of the casing 100. The third ring body 310, the fourth ring body 320 and the inner wall of the casing 100 form a first cooling cavity 420. The fourth ring body 320 is provided with a fourth oil outlet 321 which is connected to the first cooling cavity 420. Specifically, the middle portion of the stator core 200 has an axially extending inner cavity for accommodating the motor rotor. The third ring body 310 is arranged around the inner cavity of the stator core 200, and the third ring body 310 extends axially along the stator core 200. The third ring body 310 is connected to the first side wall 220 of the stator core 200 at the first axial end of the stator core 200 to achieve sealing between the third ring body 310 and the stator core 200, thereby preventing the coolant in the first cooling cavity 420 from entering the inner cavity of the stator core 200. The fourth ring body 320 is sleeved on the axial second end of the third ring body 310, and the fourth ring body 320 extends in the radial direction of the stator core 200, so that there is a gap between the fourth ring body 320 and the first side wall 220 of the stator core 200 that can accommodate the coolant, and the outer edge of the fourth ring body 320 in the radial direction of the stator core 200 is connected to the inner wall of the housing 100 to achieve sealing between the fourth ring body 320 and the housing 100. The fourth ring body 320 is provided with a fourth oil outlet 321 that is connected to the first cooling cavity 420, and the fourth oil outlet 321 extends in the axial direction of the stator core 200.

[0067] In the present application, the fourth oil outlet hole 321 can be set at a position close to the fourth ring body 320 along the radial outer edge of the stator core 200, so as to slowly drain the coolant in the first cooling cavity 420 when the motor is stationary; or the fourth oil outlet hole 321 is set at a position close to the fourth ring body 320 along the radial inner edge of the stator core 200, so as to release the coolant in the first cooling cavity 420 that is higher than the highest point of the first end of the winding 500 when the motor is running; or the fourth oil outlet hole 321 is set between the radial inner edge and the outer edge of the fourth ring body 320 along the stator core 200 to assist in oil drainage.

[0068] In the motor provided in the present application, the motor further includes a first seal 710 and a second seal 720, wherein the first seal 710 is connected between the first axial end of the third ring body 310 and the first side wall 220, and the second seal 720 is connected between the outer edge of the fourth ring body 320 in the radial direction of the stator core 200 and the inner wall of the housing 100, so as to improve the sealing performance between the first oil collecting member 300 as a whole and the housing 100 and the stator core 200. Specifically, a first groove 311 is formed by a depression at one end surface of the third ring body 310 close to the stator core 200, and the first groove 311 is arranged along the circumferential direction of the inner cavity of the stator core 200, the first seal 710 is arranged in the first groove 311 and is tightly connected to the groove wall of the first groove 311, and the first seal 710 is connected to the first side wall 220, so as to further improve the sealing performance between the third ring body 310 and the stator core 200. The fourth ring body 320 is recessed at the outer edge in the radial direction of the stator core 200 to form a second groove 322. The second groove 322 is arranged around the third ring body 310. The second seal 720 is arranged in the second groove 322 and is tightly connected to the groove wall of the second groove 322. The second seal 720 is connected to the inner wall of the casing 100 to further improve the sealing between the fourth ring body 320 and the casing 100.

[0069] Optionally, the first sealing member 710 and the second sealing member 720 may both be sealing rings or sealants.

[0070] refer to Figure 6 , Figure 7 , Figure 8 and Fig. 9In a possible implementation, the stator core 200 includes a core body 220a and a lug 260 protruding from the outer periphery of the core body 220a, and a gap is formed between the outer periphery of the lug 260 and the inner wall of the housing 100; the second oil collecting member 600 includes a first ring body 600a and a second ring body 600b, the second ring body 600b is sleeved on the first ring body 600a, the first ring body 600a is connected to a side wall of the core body 220a along the axial direction and encloses a second cooling cavity 430, the outer periphery of the lug 260, the inner wall of the housing 100, the second ring body 600b and a side wall of the core body 220a along the axial direction of the stator core 200 enclose a cooling channel 410, and the second ring body 600b separates the cooling channel 410 and the second cooling cavity 430. Specifically, a bolt 800 is inserted into the lug 260, and the stator core 200 is fixed to the housing 100 by the bolt 800. The cooling channel 410 and the second cooling cavity 430 are separated by the second ring body 600b, so as to cool the lug 260 of the stator core 200 and the winding 500 located in the second cooling cavity 430 respectively. There is a gap between the inner wall of the housing 100 and the outer wall of the lug 260, and there is a gap between one end of the lug 260 in the axial direction and the inner wall of the second ring body 600b. After the stator core 200 is installed in the housing 100, the lug 260, the inner wall of the housing 100, and the inner wall of the second oil collecting member 600 form a cooling channel 410, so that the lug 260 of the stator core 200 can be cooled while the winding 500 is cooled, so as to further improve the cooling effect of the stator core 200.

[0071] The first ring body 600a and the second ring body 600b are integrally formed, which is easy to manufacture and improves the sealing performance of the second oil collecting member 600 itself.

[0072] An annular plate 610 is convexly provided on a side wall of the second ring body 600b close to the stator core 200, and the annular plate 610 is connected to the inner wall of the housing 100 and a side wall of the stator core 200 along the axial direction to form a cooling channel 410. A third groove 611 is recessed on the annular plate 610, and the third groove 611 is arranged around the cooling channel 410; a fourth groove 620 is provided on a side wall of the second oil collecting member 600 close to the housing 100, and the fourth groove 620 is arranged around the stator core 200, and a sealing ring is placed or a sealant is applied in the third groove 611 and the fourth groove 620 to achieve sealing between the second oil collecting member 600 and the stator core 200 and the housing 100, so that the cooling channel 410 and the second cooling cavity 430 are isolated from each other.

[0073] In the description of the embodiments of the present application, 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 application and simplifying the description, and do not indicate or imply 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 application.

[0074] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A motor, characterized in that: include: A stator core, wherein the stator core is provided with a cooling channel and a winding; A first oil collecting member is provided on one side of the stator core along the axial direction, and a region between the first oil collecting member and the one side of the stator core along the axial direction forms a first cooling cavity, and the first cooling cavity accommodates the winding; The first cooling cavity and the cooling channel are isolated from each other, and the cooling channel and the first cooling cavity are suitable for being connected to the oil supply component respectively.

2. The motor according to claim 1, characterized in that The motor further includes a casing, the stator core is accommodated in the casing, and the cooling channel is formed between an outer peripheral wall of the stator core and an inner wall of the casing.

3. The motor according to claim 2, characterized in that A first protrusion and a second protrusion are convexly provided on the outer peripheral wall of the stator core, an end of the first protrusion away from the outer peripheral wall is tightly connected to the inner wall of the housing, and an end of the second protrusion away from the outer peripheral wall is tightly connected to the inner wall of the housing; The first protrusion and the second protrusion are spaced apart in the axial direction of the stator core, the first protrusion, the second protrusion, the outer peripheral wall and the inner wall of the casing form the cooling channel, and the first protrusion or the second protrusion separates the cooling channel and the first cooling cavity.

4. The motor according to claim 3, characterized in that The first protrusion is arranged around the circumference of the stator core, and the second protrusion is arranged around the circumference of the stator core.

5. The motor according to claim 2, characterized in that: The first oil collecting member is connected to the inner wall of the casing and a side wall of the stator core along the axial direction to form the first cooling cavity.

6. The motor according to claim 2, characterized in that The casing is provided with a first oil inlet hole, a second oil inlet hole, a first oil outlet hole and a second oil outlet hole; the cooling channel is communicated with the first oil inlet hole and the first oil outlet hole; the first cooling cavity is communicated with the second oil inlet hole and the second oil outlet hole; the cooling channel is suitable for being communicated with the oil supply component through the first oil inlet hole; the first cooling cavity is suitable for being communicated with the oil supply component through the second oil inlet hole.

7. The motor according to claim 6, characterized in that The first oil inlet hole and the second oil inlet hole are arranged at intervals in the axial direction of the stator core, and the first oil outlet hole and the second oil outlet hole are arranged at intervals in the axial direction of the stator core.

8. The motor according to claim 6, characterized in that The first oil inlet hole and the first oil outlet hole are arranged at intervals in the circumferential direction of the stator core, and the second oil inlet hole and the second oil outlet hole are arranged at intervals in the circumferential direction of the stator core.

9. The motor according to claim 6, characterized in that The motor further comprises a second oil collecting member, wherein a second cooling cavity is formed between the second oil collecting member and an area of ​​the stator core axially away from a side of the first oil collecting member, and the second cooling cavity is isolated from the cooling channel and the first cooling cavity.

10. The motor according to claim 9, characterized in that The casing is also provided with a third oil inlet hole and a third oil outlet hole, and the second cooling cavity is communicated with the third oil inlet hole and the third oil outlet hole; the second cooling cavity is suitable for being connected with the oil supply component through the third oil inlet hole.

11. The motor according to claim 10, characterized in that The first oil inlet hole, the second oil inlet hole and the third oil inlet hole are arranged at intervals in the axial direction of the stator core, and the first oil inlet hole is arranged between the second oil inlet hole and the third oil inlet hole; The first oil outlet hole, the second oil outlet hole and the third oil outlet hole are arranged at intervals in the axial direction of the stator core, and the first oil outlet hole is arranged between the second oil outlet hole and the third oil outlet hole.

12. The motor according to claim 9, characterized in that The first end of the winding is accommodated in the first cooling cavity, and the second end of the winding is accommodated in the second cooling cavity.

13. The motor according to claim 9, characterized in that The stator core comprises a core body and a lug protruding from the outer periphery of the core body, and a gap is formed between the outer periphery of the lug and the inner wall of the casing; The second oil collecting member includes a first ring body and a second ring body, the second ring body is sleeved on the first ring body, the first ring body is connected to a side wall of the core body along the axial direction and forms the second cooling cavity, the outer periphery of the support ear and the inner wall of the housing, the second ring body and a side wall of the core body along the axial direction of the stator core form the cooling channel, and the second ring body separates the cooling channel and the second cooling cavity.

14. The motor according to claim 4, characterized in that The first oil collecting member includes a third ring body and a fourth ring body, the axial first end of the third ring body is connected to an axial side wall of the stator core, the fourth ring body is sleeved on the axial second end of the third ring body, a gap is formed between the fourth ring body and an axial side wall of the stator core, the fourth ring body is connected to the inner wall of the casing at the radial outer edge of the stator core, the third ring body, the fourth ring body and the inner wall of the casing form the first cooling cavity, and the fourth ring body is provided with a fourth oil outlet hole connected to the first cooling cavity.

15. The motor according to claim 14, characterized in that The motor further comprises a first seal, wherein the first seal is connected between an axial first end of the third ring body and an axial side wall of the stator core.

16. The motor according to claim 14, characterized in that The motor further includes a second seal connected between an outer edge of the fourth ring body in a radial direction of the stator core and an inner wall of the housing.

17. A powertrain, characterized in that: Comprising a motor as described in any one of claims 1-16.

18. A vehicle, characterized in that: It comprises the motor as claimed in any one of claims 1 to 16 or the powertrain as claimed in claim 17.

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