Motor assembly and vehicle

Abstract

The invention discloses a motor assembly and a vehicle. The motor assembly comprises a motor. The motor comprises a stator, a rotor, a first flow channel and a second flow channel. And the first flow channel is used for circulating a working medium and cooling the stator. And the second flow channel is used for circulating a working medium and is at least used for cooling the rotor. When the motor is in the first working condition, the first flow channel works. When the motor is in a second working condition, the second flow channel works, or the second flow channel and the first flow channel both work, and the first working condition is different from the second working condition. The second flow channel is used for introducing oil to guide the oil to the rotor to cool the rotor in a first working condition such as motor charging, motor self-heating and the like with relatively high motor cooling requirements, and the first flow channel is used for introducing oil to throw oil to cool the stator winding in a second working condition such as motor driving and the like with relatively low motor cooling requirements, so that two motor cooling modes are realized; various working conditions of the motor are adapted, and the cooling performance of the motor is improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and more specifically, to a motor assembly and a vehicle. Background Art

[0002] Currently, vehicles equipped with electric motors usually have only one cooling method for the motors. However, the motors are currently in more and more working conditions. In addition to the common motor driving conditions during vehicle driving, the motors still need to work and generate heat under conditions such as motor charging conditions or motor self-heating conditions. Therefore, a single cooling method cannot meet the cooling requirements of the motors under various working conditions. Summary of the invention

[0003] The embodiments of the present application provide a motor assembly and a vehicle to solve at least one of the above-mentioned technical problems.

[0004] In a first aspect, the present application provides a motor assembly, which includes a motor. The motor includes a rotor, a stator, a first flow channel, and a second flow channel. The first flow channel is used to circulate a working medium, and the first flow channel is used to cool the stator. The second flow channel is used to circulate a working medium, and the second flow channel is at least used to cool the rotor. When the motor is in a first operating condition, the first flow channel works; when the motor is in a second operating condition, the second flow channel works, or both the second flow channel and the first flow channel work, wherein the first operating condition is different from the second operating condition.

[0005] In some embodiments, a switch valve is disposed on the second flow channel, and the switch valve is used to open or close the second flow channel.

[0006] In some embodiments, the second flow channel and the first flow channel are both provided with a switch valve, and the switch valve is used to open or close the first flow channel and the second flow channel.

[0007] In certain embodiments, the rotor includes rotor magnetic steel, and the second flow channel is used to cool the rotor magnetic steel.

[0008] In some embodiments, when the motor is in the second operating condition, the temperature of the rotor or the rotor magnetic steel is greater than the temperature of the rotor or the rotor magnetic steel in the first operating condition.

[0009] In some embodiments, when the motor is in the second operating condition, the heating rate of the rotor or the rotor magnetic steel is greater than the heating rate of the rotor or the rotor magnetic steel in the first operating condition.

[0010] In some embodiments, the first operating condition includes a motor driving condition; and the second operating condition includes a motor charging condition or a motor self-heating condition.

[0011] In some embodiments, the motor assembly also includes a rotating shaft and two end plates, the rotor and the end plates are sleeved on the rotating shaft, the rotor is located between the two end plates, and the second flow channel is configured to allow the working fluid to flow through the rotating shaft and the end plates and then reach the rotor.

[0012] In some embodiments, the second flow channel is configured to allow the working medium to flow through the rotating shaft, the end plate and the rotor and then reach the stator.

[0013] In some embodiments, a second flow channel is provided in the rotating shaft, the end plate and the rotor form a second liquid guiding channel, the second flow channel and the second liquid guiding channel are connected, the second flow channel includes the second flow channel and the second liquid guiding channel, and the working fluid enters the second liquid guiding channel from the second flow channel and reaches the rotor to cool the rotor.

[0014] In some embodiments, the end plate is provided with a convection channel, the rotor magnet is provided with a rotor magnet groove, the convection channel and the rotor magnet groove are connected, and the second liquid guide channel includes: a convection channel and the rotor magnet groove.

[0015] In some embodiments, the end plate includes two, the convection channel includes a first convection channel and a second convection channel, the first convection channel is connected to the second convection channel and the rotor magnetic steel slot, the second convection channel is connected to the rotor magnetic steel slot, the working fluid enters the first convection channel of one end plate from the second convection channel of one end plate, then enters the rotor magnetic steel slot, and then enters the second convection channel of the other end plate.

[0016] In some embodiments, the second flow channel also includes the second liquid inlet channel, and the second liquid inlet channel is at least partially arranged along the axial direction of the motor. After the working medium enters the second liquid guide pipe from the second liquid inlet channel, it reaches the rotor through the second liquid guide channel to cool the rotor.

[0017] In certain embodiments, the motor assembly further includes an end cover, at least a portion of the second liquid inlet channel is disposed on the end cover, and the second liquid inlet channel extends on the end cover along a radial direction of the motor.

[0018] In some embodiments, the motor assembly further includes a reducer, the reducer includes an input shaft of the motor assembly, the end cover of the motor assembly is arranged on the reducer, and the input shaft is connected to the rotating shaft; the second liquid inlet channel is arranged on the end cover, and the second liquid inlet channel is arranged on the input shaft; a second liquid guide tube is arranged in the input shaft inner cavity of the input shaft, and the second liquid guide tube is also provided with a second oil guide cavity, the second liquid guide tube is connected with the inner cavity of the rotating shaft through the input shaft inner cavity, and the second liquid inlet channel extends along the radial direction of the motor at the end cover; the working medium flows into the end cover from the inlet of the second liquid inlet channel and reaches the input shaft, and reaches the rotating shaft through the input shaft. .

[0019] In certain embodiments, the inlet of the second liquid inlet channel is disposed at the end cover, and the switch valve is disposed at the inlet of the second liquid inlet channel.

[0020] In some embodiments, the first flow channel is configured to allow the working medium to flow through the rotating shaft and the end plate and then reach the stator.

[0021] In some embodiments, the end plate is further provided with a first liquid guiding channel, the first liquid guiding channel includes a plurality of channels, the end plate includes a plurality of convection channels, and the plurality of first liquid guiding channels and the convection channels are spaced apart.

[0022] In some embodiments, a first flow channel is provided in the rotating shaft, the first flow channel and the second flow channel are not connected, and the first liquid guiding channel and the second liquid guiding channel are not connected; the first flow channel includes the first flow channel and the first liquid guiding channel, and the working fluid reaches the stator through the first flow channel and the first liquid guiding channel to cool the stator.

[0023] In some embodiments, the motor assembly also includes a first liquid conduit, the rotating shaft is sleeved on the first liquid conduit, the first flow channel includes the first liquid conduit, a flow gap is formed between the inner wall of the rotating shaft and the outer wall of the first liquid conduit, and the second flow channel includes the flow gap.

[0024] In some embodiments, a second rotating shaft oil hole is provided on the rotating shaft, and the second rotating shaft hole is communicated with the flow gap, thereby communicating with the second liquid inlet channel and the second liquid guide channel.

[0025] In some embodiments, the first liquid guide tube is assembled into the inner cavity of the rotating shaft through axial and radial limitation.

[0026] In certain embodiments, a limiting strut is provided on the outer peripheral wall of the first liquid guiding tube, and a limiting groove is provided on the inner wall of the inner cavity of the rotating shaft, and the limiting strut cooperates with the limiting groove.

[0027] In certain embodiments, the limiting support rod extends obliquely relative to the axial direction of the first catheter.

[0028] In some embodiments, the first flow channel includes a first liquid inlet channel, the first liquid inlet channel is at least partially radially arranged, and the oil inlet port of the first liquid guide tube is gap-matched with the first liquid inlet channel.

[0029] In certain embodiments, a gap between the oil inlet of the first liquid guiding tube and the first liquid inlet channel has a value in the range of greater than or equal to 0.1 mm and less than or equal to 1 mm.

[0030] In some embodiments, an oil outlet hole is provided on the first liquid guide tube, a first shaft oil hole is provided on the shaft, the shaft hole is communicated with the oil outlet hole and with the first liquid guide channel, thereby connecting the first liquid guide tube and the first liquid guide channel.

[0031] In some embodiments, a sealing ring is provided on the outer peripheral wall of the oil outlet hole, and the sealing ring is used to seal the gap between the outer peripheral wall of the oil outlet hole and the inner wall of the inner cavity of the rotating shaft.

[0032] In some embodiments, the oil outlet hole protrudes relative to the first liquid guide tube.

[0033] In some embodiments, there are at least two oil outlet holes, the two oil outlet holes are distributed along the circumference of the first liquid guide tube, and there is an angle V between the two oil outlet holes. The value range of the angle V is greater than or equal to 0° and less than or equal to 180°.

[0034] In some embodiments, the oil outlet hole includes a first oil outlet hole and a second oil outlet hole distributed along the axial direction of the first liquid guide tube, and the shaft hole includes a first axial hole and a second axial hole distributed along the axial direction of the shaft, the first axial hole is connected to the first oil outlet hole, and the second axial hole is connected to the second oil outlet hole.

[0035] In some embodiments, there are multiple first oil outlet holes, and the multiple first oil outlet holes are distributed along the circumference of the first liquid guiding tube. There are multiple second oil outlet holes, and the multiple second oil outlet holes are distributed along the circumference of the first liquid guiding tube. In the axial direction of the first liquid guiding tube, there is a minimum internal angle X between the first oil outlet hole and the second oil outlet hole, and the value range of the minimum internal angle X is greater than or equal to 0° and less than or equal to 180°.

[0036] In some embodiments, there are multiple first oil outlet holes and multiple second oil outlet holes, and the multiple first oil outlet holes are distributed around the axis of the first liquid conduit, and the multiple second oil outlet holes are distributed around the axis of the first liquid conduit. An angle Y is provided between two adjacent first oil outlet holes or two adjacent second oil outlet holes, and the value range of the angle Y is greater than or equal to 0° and less than or equal to 180°.

[0037] In some embodiments, the motor includes a first motor and a second motor, the first motor is provided with the first flow channel and the second flow channel, the first flow channel is used to cool the first stator of the first motor, the second flow channel is used to cool the first rotor magnet of the first motor, the second motor is provided with a third flow channel and a fourth flow channel, the third flow channel is used to cool the second stator of the second motor, and the fourth flow channel is used to cool the second rotor magnet of the second motor.

[0038] In certain embodiments, the first flow channel includes a first liquid inlet channel, the third flow channel includes a third liquid inlet channel, and the third liquid inlet channel and the first liquid inlet channel are the same liquid inlet pipe.

[0039] In some embodiments, the first flow channel includes a first liquid inlet channel, and the third flow channel includes a third liquid inlet channel, and the third liquid inlet channel is disposed adjacent to the first liquid inlet channel.

[0040] In some embodiments, the first flow channel includes a first liquid inlet channel, the third flow channel includes a third liquid inlet channel, and the third liquid inlet channel and the first liquid inlet channel are disposed between the first motor and the second motor.

[0041] In certain embodiments, the motor assembly further includes a reducer, the reducer includes an input shaft of the motor assembly, and an end cover of the motor assembly is disposed on the reducer.

[0042] In a second aspect, the present application provides a vehicle, comprising the motor assembly described in any one of the above-mentioned embodiments.

[0043] The motor assembly and the vehicle of the embodiment of the present application are provided with a first flow channel and a second flow channel. The first flow channel is used to circulate the working fluid to cool the stator in a first operating condition such as motor driving when the motor cooling demand is relatively small. The second flow channel is used to circulate the working fluid to the rotor to cool the rotor in a second operating condition such as motor charging and motor self-heating when the motor cooling demand is relatively large. Thus, two cooling methods for the motor are realized through the two flow channels to adapt to various operating conditions of the motor, avoid problems such as motor ablation and demagnetization, and improve the cooling performance of the motor.

[0044] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0046] Figure 1 is a schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0047] Figure 2 is a schematic diagram of the structure of a motor assembly according to certain embodiments of the present application;

[0048] Figure 3 It is Figure 2 Schematic diagram of the cross section at AA

[0049] Figure 4 is a partial cross-sectional schematic diagram of a motor assembly in some embodiments of the present application under a first working condition;

[0050] Figure 5 is a partial cross-sectional schematic diagram of a motor assembly in some embodiments of the present application under a second working condition;

[0051] Figure 6 is a structural schematic diagram of a portion of the structure of a motor assembly in certain embodiments of the present application;

[0052] Figure 7 is Figure 6 A schematic cross-sectional view at BB of FIG.

[0053] Figure 8 is a three-dimensional schematic diagram of a partial structure of a motor assembly according to certain embodiments of the present application;

[0054] Fig. 9 is Figure 8 A schematic cross-sectional view of the CC of FIG.

[0055] Fig.10 is Figure 8 Schematic diagram of the cross section at DD;

[0056] Fig.11 is a three-dimensional schematic diagram of a partial structure of a motor assembly according to certain embodiments of the present application;

[0057] Fig.12 is Fig.11 A schematic cross-sectional view of the EE section;

[0058] Fig.13 is a three-dimensional schematic diagram of a partial structure of a motor assembly according to some embodiments of the present application from another perspective;

[0059] Fig.14is a cross-sectional schematic diagram of a partial structure of a motor assembly according to certain embodiments of the present application from another perspective;

[0060] Fig.15 It is a three-dimensional schematic diagram of a partial structure of a motor assembly of certain embodiments of the present application.

[0061] Description of main component symbols:

[0062] Vehicle 10000; motor assembly 1000; motor 100; first motor 110; second motor 120; rotating shaft 11; peripheral wall 111; first end 101; second end 102; rotating shaft inner cavity 113; limiting groove 1131; limiting surface 1133; limiting groove 11335; first rotating shaft oil hole 115; first shaft hole 1151; second shaft hole 1152; second rotating shaft oil hole 117; rotor 13; rotor magnetic steel 131; rotor magnetic steel groove 1315; end plate 15; first end plate 151; second end plate 152; convection channel 157; first convection channel 1571; second convection channel 1572; first stator 311; second stator 312; first rotor magnetic steel 131 1; second rotor magnet 1312; stator 31; stator winding 33; sealing ring 40; first liquid guide pipe 50; first oil guide cavity 51; oil outlet hole 53; first oil outlet hole 531; second oil outlet hole 532; first gap 521; second gap 522; oil inlet 55; outer peripheral wall 57; limiting support rod 58; limiting boss 59; end cover 60; input shaft 70; input shaft inner cavity 71; second liquid guide pipe 80; second oil guide cavity 81; switch valve 90; reducer 200; housing 300; first liquid inlet channel 310; first flow channel S1, second flow channel S2; first flow channel S11 second liquid inlet channel 320; second flow channel S21; first liquid guide channel S12; second liquid guide channel S22. DETAILED DESCRIPTION

[0063] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific implementation methods disclosed below.

[0064] In the description of the present application, it should be understood that the terms "center", "length", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] See also Figure 1, the vehicle 10000 of the embodiment of the present application includes a motor assembly 1000. Among them, the vehicle 10000 includes but is not limited to passenger vehicles such as pure electric vehicles and hybrid vehicles or large-scale engineering vehicles whose working conditions are not very bad. Further, in some embodiments, the vehicle 10000 also includes a body and wheels, and the wheels are arranged on the body and can move relative to the body to achieve the movement of the vehicle 10000 (for example, forward, backward or turning, etc.). The motor assembly 1000 is arranged on the body and connected to the wheels. The motor assembly 1000 can provide power for the movement of the wheels relative to the body, that is, when the motor assembly 1000 operates normally, the motor assembly 1000 can output power to the wheels to drive the wheels to move relative to the body. It can be understood that the vehicle 10000 at least includes the beneficial effects of the motor assembly 1000.

[0069] See also Figures 1 to 5 , the motor assembly 1000 includes the motor 100. The motor 100 includes a rotor 13, a stator 31, a first flow channel S1 and a second flow channel S2. The stator 31 is installed inside the motor 100. The rotor 13 is rotatably installed inside the motor 100. The first flow channel S1 is used to circulate the working medium, and the first flow channel S1 is used to cool the stator 31. The second flow channel S2 is used to circulate the working medium, and the second flow channel S2 is at least used to cool the rotor 13. When the motor 100 is in a first working condition, the first flow channel S1 works; when the motor 100 is in a second working condition, the second flow channel S2 works, or the second flow channel S2 and the first flow channel S1 both work, wherein the first working condition is different from the second working condition.

[0070] Specifically, the motor 100 is a structure in the motor assembly 1000 that can generate power. Under the operating conditions of the motor 100 such as vehicle driving, the motor 100 can output power to drive the wheels to move. The motor 100 in the motor assembly 1000 can be one or more, which is not limited in the present application. It should be noted that in some embodiments, the motor 100 includes but is not limited to a DC motor 100, an AC asynchronous motor 100, a permanent magnet synchronous motor 100, and the like. In an embodiment in which the motor assembly 1000 includes a plurality of motors 100, the types of the motors 100 may be different. The motor 100 includes a rotor 13 and a stator 31, the rotor 13 is rotatably mounted on the housing 300, the rotor 13 is rotatably mounted on the housing 300, and under the operating conditions of the motor 100, the rotor 13 can rotate relative to the stator 31, and the stator 31 and the housing 300 remain relatively stationary.

[0071] Exemplarily, the motor assembly 1000 also includes a housing 300. The housing 300 is a structure for installing other components and accommodating the other components inside the housing 300. The housing 300 of the present application is used to install the motor 100, and at least part of the motor 100 is accommodated inside the housing 300 to protect the motor 100. The cross-sectional shape of the housing 300 may be, but is not limited to, circular, elliptical, rectangular or other polygonal shapes, and the cross-sectional shape of the housing 300 of the present application is rectangular. The material of the housing 300 may be plastic or metal, etc. In the case where the material of the housing 300 is plastic, the housing 300 has good insulation performance, low cost, and light weight. In the case where the material of the housing 300 is metal, the housing 300 has high strength, good wear resistance, and long service life.

[0072] The stator 31 is provided with a stator winding 33. The stator 31 is mounted on the housing 300, and the stator winding 33 is mounted on the stator 31. The stator winding 33 can generate a rotating magnetic field in the air gap by inputting current, and interact with the magnetic field of the rotor 13 to generate a rotating torque, thereby driving the rotor 13 to rotate. It is understandable that the stator winding 33 will generate heat during the working process, so it needs to be cooled by a working fluid.

[0073] The motor 100 corresponds to different working conditions in different states of the vehicle. In some embodiments, the first working condition includes a motor driving working condition. The second working condition includes a motor charging working condition or a motor self-heating working condition. When the motor 100 is in the first working condition, the vehicle is in a state such as driving, and the first flow channel S1 can cool the stator 31 under the first working condition, thereby reducing the temperature of the motor 100 under the motor driving working condition, and ensuring the stable operation of the motor 100 under the state such as vehicle driving. When the motor 100 is in the second working condition, the vehicle is in a state such as charging boost and battery self-heating. The second flow channel S2 can cool the rotor 13 and / or the stator 31 under the second working condition, thereby reducing the temperature of the motor 100 under the motor charging working condition or the motor self-heating working condition, and ensuring the stable operation of the motor 100 under such working conditions. It can be understood that the first working condition is the working condition that the motor 100 is in for a longer time, that is, the first working condition is a normally open working condition. The second working condition is a special working condition. In some embodiments, when the motor 100 is in the second working condition, the temperature of the rotor 13 or the rotor magnet 131 is greater than the temperature of the rotor 13 or the rotor magnet 131 in the first working condition. In some embodiments, when the motor 100 is in the second working condition, the heating rate of the rotor 13 or the rotor magnet 131 is greater than the heating rate of the rotor 13 or the rotor magnet 131 in the first working condition. Therefore, the motor 100 has a greater cooling demand in the second working condition, and a large flow of working fluid is required to cool the rotor 13 or the rotor magnet 131. The second flow channel S2 cools the rotor 13, which can adapt to the temperature and / or heating rate of the rotor 13 or the rotor magnet 131 in the second working condition, reduce the temperature and / or heating rate of the rotor 13 or the rotor magnet 131 in the second working condition, avoid demagnetization of the rotor magnet 131 caused by overheating of the rotor 13 or the rotor magnet 131, and ensure the stability of the magnetic field in the motor 100. Based on this, the present application configures different flow channels for different working conditions of the motor 100, so as to achieve cooling requirements under different working conditions.

[0074] The motor assembly 1000 of the embodiment of the present application is provided with a first flow channel S1 and a second flow channel S2. The first flow channel S1 is used to circulate the working fluid to cool the stator 31 in the first working condition such as motor driving when the cooling demand of the motor 100 is small. The second flow channel S2 is used to circulate the working fluid to the rotor 13 to cool the rotor 13 in the second working condition such as motor charging and motor self-heating when the cooling demand of the motor 100 is large. Thus, two types of cooling of the motor 100 are achieved through the two flow channels to adapt to various working conditions of the motor 100, avoid problems such as ablation and demagnetization of the motor 100, and improve the cooling performance of the motor 100.

[0075] See also Figures 3 to 5 In some embodiments, a switch valve 90 is provided on the second flow channel S2, and the switch valve 90 is used to open or close the second flow channel S2.

[0076] Specifically, the switch valve 90 controls the opening and closing of its valve core through electromagnetic force, thereby controlling the conduction and cutoff of the second flow channel S2, and realizing the opening and closing of the second flow channel S2 in the motor assembly 1000. The switch valve 90 can be one or more. Exemplarily, the number of the switch valve 90 corresponds to the number of the second flow channels S2. The on and off of the electromagnet in the switch valve 90 can control the circulation of the working medium, thereby realizing the control of the second flow channel S2.

[0077] See also Figure 4 and Figure 5 ,and Figures 8 to 10 In some embodiments, the rotor 13 includes a rotor magnet 131 , and the second flow channel S2 is used to cool the rotor magnet 131 .

[0078] Specifically, the rotor magnet 131 is used to generate a magnetic field, thereby realizing the conversion of electrical energy and mechanical energy of the motor. The rotor magnet 131 is connected to the iron core of the rotor 13. When the working medium flows in the second flow channel S2, the working medium in the second flow channel S2 can cool the rotor magnet 131, reduce the heat of the rotor magnet 131, and ensure the stability of the magnetic field in the motor 100.

[0079] In some embodiments, the motor assembly 1000 further includes a rotating shaft 11 and two end plates 15. The rotor 13 and the end plates 15 are sleeved on the rotating shaft 11, the rotor 13 is located between the two end plates 15, and the second flow channel S2 is configured for the working medium to flow through the rotating shaft 11 and the end plates 15 and then reach the rotor 13.

[0080] The rotor assembly 10 includes a rotating shaft 11, a rotor 13 and two end plates 15. In the present application, the extension direction of the rotating shaft 11 is taken as the first direction X, and the second direction Z is perpendicular to the first direction. The rotor 13 is sleeved on the rotating shaft 11, and can rotate relative to the rotating shaft 11 on a plane perpendicular to the first direction X. The end plates 15 are sleeved on the rotating shaft 11 and are located on opposite sides of the rotor 13 in the first direction X. The rotor 13 and the two end plates 15 are assembled to the rotating shaft 11 by press fitting, so that the end plates 15 can rotate relative to the rotating shaft 11 following the rotor 13, and the rotating shaft 11 is connected to the housing 300 through a bearing. The first direction X is also the axial direction of the motor 100, and the second direction is the radial direction of the motor 100.

[0081] The first flow channel S1 is located at the first end 101 of the rotating shaft 11 , and the second flow channel S2 is located at the second end 102 of the rotating shaft 11 . The two oil passages enter from both ends of the rotating shaft 11 without affecting each other.

[0082] When the motor 100 is in the first working condition, the working medium can enter the rotating shaft 11 and then enter the two end plates 15. It can be understood that when the end plates 15 rotate with the rotor 13, the working medium will be thrown to the stator winding 33 under the action of centrifugal force, thereby cooling the stator winding 33. When the motor 100 is in the second working condition, the second flow channel S2 is configured to allow the working medium to flow through the rotating shaft 11 and one end plate 15 into the rotor 13, thereby cooling the rotor 13.

[0083] See also Figure 4 and Figure 5 ,and Figures 8 to 10 In some embodiments, the second flow channel S2 is configured to allow the working medium to flow through the rotating shaft 11, the end plate 15 and the rotor 13 and then reach the stator 31.

[0084] Furthermore, when the motor 100 is in the second operating condition, the second flow channel S2 is configured to allow the working medium to flow through the rotating shaft 11 and one end plate 15 into the rotor 13, thereby cooling the rotor 13. After the working medium has cooled the rotor 13, it enters the other end plate 15 and then enters the stator 31 from the end plate 15, thereby also cooling the stator 31.

[0085] See also Figure 4 and Figure 5 ,and Figures 8 to 10 In some embodiments, a second flow channel S21 is provided in the rotating shaft 11, and the end plate 15 and the rotor 13 form a second liquid guiding channel S22. The second flow channel S21 is connected to the second liquid guiding channel S22. The second flow channel S2 includes a second flow channel S21 and a second liquid guiding channel S22. The working fluid enters the second liquid guiding channel S22 from the second flow channel S21 and the second liquid guiding channel S22 and then reaches the rotor 13 to cool the rotor 13.

[0086] Specifically, the second flow passage S21 is connected to the second liquid guide passage S22, so that the working fluid can enter the rotor 13 from the rotating shaft 11, thereby interfering with the cooling of the rotor 13.

[0087] See also Figure 4 and Figure 5 ,and Figures 8 to 10 In some embodiments, a convection channel 157 is provided on the end plate 15 , a rotor magnetic steel groove 1315 is provided on the rotor magnetic steel 131 , the convection channel 157 and the rotor magnetic steel groove 1315 are connected, and the second liquid guide channel S22 includes: the convection channel 157 and the rotor magnetic steel groove 1315 .

[0088] Specifically, the convection channel 157 is the flow path of the working medium in the end plate 15 under the second working condition. The convection channel 157 can be one or more, which is not limited in the present application. Exemplarily, one convection channel 157 and one rotor magnetic steel slot 1315 can be connected, or multiple convection channels 157 and one rotor magnetic steel slot 1315 can be connected, or one convection channel 157 and multiple rotor magnetic steel slots 1315 can be connected, or any combination of the above three methods. After entering the convection channel 157, the working medium can enter the rotor magnetic steel slot 1315, thereby cooling the rotor 13 and the rotor magnetic steel 131.

[0089] See also Figure 4 and Figure 5 ,and Figures 8 to 10 In some embodiments, the end plate 15 is further provided with a first liquid guiding channel S12, the first liquid guiding channel S12 includes a plurality of first liquid guiding channels S12, and the convection channel 157 includes a plurality of first liquid guiding channels S12 and the convection channel 157 are arranged at intervals.

[0090] Specifically, the multiple convection channels 157 and the first liquid guide channel S12 can increase the flow rate of the working fluid, improve the cooling efficiency of the working fluid on the rotor magnetic steel 131 and the stator 31, and ensure the cooling effect on the rotor magnetic steel 131. The multiple first liquid guide channels S12 and the convection channels 157 are arranged at intervals to ensure that the working fluid is evenly distributed around the end plate 15, thereby providing a more consistent cooling or lubrication effect on the rotor magnetic steel 131 and the stator 31. The multiple first liquid guide channels S12 and the convection channels 157 are arranged at intervals to also help reduce dead corners or uneven areas in the flow of the working fluid.

[0091] See also Figure 4 and Figure 5 ,and Figures 8 to 10 In some embodiments, the end plate 15 includes two, and the convection channel 157 includes a first convection channel 1571 and a second convection channel 1572. The first convection channel 1571 is connected to the second flow channel S21 and the rotor magnetic steel slot 1315, and the second convection channel 1572 is connected to the rotor magnetic steel slot 1315. The working fluid enters the first convection channel 1571 of one end plate 15 from the second flow channel 1572 of one end plate 15, then enters the rotor magnetic steel slot 1315, and then enters the second convection channel 1572 of the other end plate 15.

[0092] Specifically, the two end plates 15 include a first end plate 151 and a second end plate 152. The second end plate 152 is closer to the input shaft 70 than the first end plate 151. The convection channel 1571 of the first end plate 151 is correspondingly connected to the first shaft hole 1151, and the convection channel 1572 of the second end plate 152 is correspondingly connected to the second shaft hole 1152.

[0093] When the motor 100 is in the second operating condition, the working fluid enters the rotor magnetic steel slot 1315 from the convection channel 157 of any one or both end plates 15 (for example, the first convection channel 1571 of the first end plate 151), and the working fluid in the rotor magnetic steel slot 1315 can take away the heat of the rotor 13 or the rotor magnet 131, and after cooling the rotor 13, it flows out from the other end plate 157 (for example, the second convection channel 1572 of the second end plate 151). It should be noted that the flow gap remaining after the first liquid guide tube 50 is directly entered into the inner cavity 113 of the rotating shaft, and the first liquid guide tube 50 is not entered. Therefore, the separation of the first flow channel S11 and the second flow channel S21 is realized at the rotating shaft 11, and the inner cavity of the rotor 13 is converted from a single-layer oil circuit to a double-layer oil circuit (the first flow channel S11 and the second flow channel S21), so that the oil inlet of the first end 101 and the second end 102 of the rotating shaft 11 is independent of each other, thereby realizing the cooling of the rotor 13 or the rotor magnetic steel 131 under the second working condition and the cooling of the stator winding 33 under the first working condition. It can be understood that the flow direction of the convection channel 157 here is not restricted, and it can be from the first convection channel 1571 of the first end plate 151 to the second convection channel 1572 of the second end plate 151 in the first direction, or it can be from the first convection channel 1571 of the second end plate 151 to the second convection channel 1572 of the first end plate 151.

[0094] See also Figure 4 and Figure 5 ,and Figures 8 to 10 In some embodiments, the motor assembly 1000 also includes a second liquid inlet channel 320, which is arranged along the axial direction of the motor 100, and the second flow channel S2 also includes a second liquid inlet channel 320. After the working fluid enters the second liquid guide pipe 80 from the second liquid inlet channel 320, it reaches the rotor 13 through the second liquid guide channel S22 to cool the rotor 13.

[0095] Specifically, the motor 100 is provided with a second liquid inlet 320, which is used to introduce the working medium into the motor assembly 1000. The second liquid inlet 320 can be one or more, which is not limited in this application.

[0096] See also Figure 3 , Figure 5 and Figure 6In some embodiments, the motor assembly 1000 further includes a reducer 200, and the reducer 200 includes an input shaft 70, that is, the input shaft 70 is a part of the reducer 200. The end cover 60 is disposed on the reducer 200. In other embodiments of the present application, the end cover 60 may also be disposed on other structures of the motor assembly 1000. The input shaft 70 is transmission-connected to the rotating shaft 11. The second liquid inlet channel 320 is partially disposed on the end cover 60, and the second liquid inlet channel 320 is partially disposed on the input shaft 70; the second liquid inlet channel 320 extends along the radial direction of the motor 100 at the end cover 60; the working fluid flows from the inlet into the end cover 60 and reaches the input shaft 70, and then reaches the rotating shaft 11 via the input shaft 70.

[0097] Specifically, the end cover 60 is mounted on the housing 300 and is provided with a second liquid inlet 320. The input shaft 70 is rotatably connected to the end cover 60 and fixedly connected to the rotating shaft 11 through a spline. The input shaft 70 is provided with an input shaft inner cavity 71. The second liquid guide tube 80 is arranged in the input shaft inner cavity 71 and is provided with a second oil guide cavity 81. The second liquid guide tube 80 is connected with the rotating shaft inner cavity 113 through the input shaft inner cavity 71; the second flow channel S2 includes: the second liquid inlet 320, the second oil guide cavity 81, the input shaft inner cavity 71, the rotating shaft inner cavity 113, the first rotating shaft oil hole 115, the convection channel 157 of one end plate 15, the rotor magnetic steel slot 1315 and the convection channel 157 of the other end plate 15. When the motor 100 is in the second working condition, the working fluid enters the second oil guide cavity 81 from the end cover 60, flows into the input shaft inner cavity 71 from the second oil guide cavity 81, and then enters the shaft inner cavity 113 from the second end 102 of the shaft 11.

[0098] See also Figure 3 and Figure 5 In some embodiments, the inlet of the second liquid inlet channel 320 is disposed at the end cover 60 , and the switch valve 90 is disposed at the inlet of the second liquid inlet channel 320 .

[0099] Specifically, the inlet of the second liquid inlet channel 320 is arranged at the end cover 60, and the switch valve 90 is arranged at the inlet of the second liquid inlet channel 320. Thus, the switch valve 90 at the inlet of the second liquid inlet channel 320 can control the flow of the working fluid under the second working condition, thereby realizing the control of the flow of the working fluid under the second working condition.

[0100] See also Figure 4 In some embodiments, the first flow channel S1 is configured to allow the working medium to flow through the rotating shaft 11 and the end plate 15 and then reach the stator 31.

[0101] Specifically, the working medium flows through the rotating shaft 11 and the end plate 15 and reaches the stator 31 . The working medium can take away the heat of the stator 31 , thereby cooling the stator 13 .

[0102] See also Figure 4In some embodiments, a first flow channel S11 is provided in the rotating shaft 11, and the first flow channel S11 and the second flow channel S21 are not connected. The end plate 15 forms a first liquid guiding channel S12, and the first liquid guiding channel S12 and the second liquid guiding channel S22 are not connected. The first flow channel S1 includes the first flow channel S11 and the first liquid guiding channel S12. The working fluid reaches the stator 31 from the first flow channel S11 through the first liquid guiding channel S12 to cool the stator 31.

[0103] Specifically, the first flow channel S11 and the second flow channel S21 are not connected to achieve the diversion of the first flow channel S1 and the second flow channel S2. Similarly, the first liquid guide channel S12 and the second liquid guide channel S22 are not connected to achieve the diversion of the first flow channel S1 and the second flow channel S2. Therefore, under different working conditions, the motor 100 can have different flow channels to achieve cooling of the stator 31 and / or the rotor 13. The working fluid reaches the stator 31 through the first liquid guide channel S12 after the first flow channel S11 to cool the stator 31, thereby achieving cooling of the motor 100 under the first working condition.

[0104] See also Figure 6 , Figure 7 as well as Fig.11 In some embodiments, the motor assembly 1000 also includes a first liquid conduit 50, the rotating shaft 11 is sleeved on the first liquid conduit 50, the first flow channel S11 includes the first liquid conduit 50, a flow gap is formed between the inner wall of the rotating shaft inner cavity 113 and the outer wall of the first liquid conduit 50, and the second flow channel S21 includes a flow gap.

[0105] Specifically, the rotating shaft 11 is provided with a rotating shaft inner cavity 113, and the rotating shaft inner cavity 113 is at least used to accommodate the first liquid guiding tube 50. It should be noted that after the rotating shaft inner cavity 113 accommodates the first liquid guiding tube 50, there is still a certain flow gap between the inner wall of the rotating shaft inner cavity 113 and the outer wall of the first liquid guiding tube 50, and the flow gap is one of the paths of the second flow channel S2. That is, when the motor 100 is in the first working condition, the working fluid enters the first liquid conduit 50 directly after entering the rotating shaft 11, and when the motor 100 is in the second working condition, the working fluid enters the flow gap of the rotating shaft inner cavity 113 instead of the first liquid conduit 50, thereby realizing the separation of the first flow channel S11 and the second flow channel S21 at the rotating shaft 11, and converting the inner cavity of the rotor 13 from a single-layer oil circuit to a double-layer oil circuit (first flow channel S11 and second flow channel S21), thereby realizing two cooling methods: cooling the rotor 13 or the rotor magnet 131 in the second working condition and cooling the stator winding 33 in the first working condition.

[0106] The flow gap includes a first gap 521 and a second gap 522. The second oil outlet hole 532 is closer to the input shaft 70 than the first oil outlet hole 531. A first gap 521 is provided between adjacent first oil outlet holes 531, and a second gap 522 is provided between adjacent second oil outlet holes 532. The first gap 521 and the second gap 522 are used to allow the working medium to enter the rotating shaft 11 under the second working condition.

[0107] In some embodiments, a second shaft oil hole 117 is provided on the shaft 11 , and the second shaft oil hole 117 is communicated with the flow gap, thereby communicating with the second liquid inlet channel 320 and the second liquid guide channel S22 .

[0108] Specifically, under the second working condition, the first gap 521 and the second gap 522 are channels for the working medium to enter the second shaft oil hole 117 under the second working condition. The working medium can enter the second shaft oil hole 117 through the first gap 521 and the second gap 522, thereby dissipating heat for the rotor 13. The first gap 521 and the first oil outlet hole 531 are spaced apart, so the first gap 521 and the first oil outlet hole 531 are spaced apart to correspond to the second shaft oil hole 117, thereby allowing a portion of the working medium to enter the first liquid guide channel S12 through the first shaft hole 1151 under the first working condition, and allowing a portion of the working medium to enter the convection channel 157 through the second shaft oil hole 117 under the second working condition. The first shaft holes 1151 are independent of each other and do not interfere with each other, and the working medium flow under two working conditions can be completed on the same shaft 11. Further, the first gap 521 can be formed together with the first oil outlet hole 531, and the second gap 522 can be formed together with the second oil outlet hole 532, which is beneficial to the processing of the motor 100.

[0109] See also Figure 4 and Figure 5 In some embodiments, the first liquid guide tube 50 is assembled into the shaft inner cavity 113 of the shaft 11 through axial and radial limiting.

[0110] Specifically, the axial and radial limits provide the first liquid guide tube 50 with position limits in two directions, ensuring the effective fixation of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft, enhancing the stability of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft, and preventing displacement caused by vibration or pressure changes, thereby ensuring the smooth operation of the motor 100 and the reliability of the oil circuit system. At the same time, the axial and radial limits simplify the assembly process of the first liquid guide tube 50, making it easier to install the oil guide tube in the correct position, and also facilitating subsequent maintenance and replacement work. In addition, through the precise matching of the axial and radial limits, unnecessary movement and friction of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft can be reduced, thereby reducing wear and extending the service life of the oil guide tube and related components.

[0111] See also Figures 4 to 7 ,as well as Fig.11and Fig.12 In some embodiments, a limiting strut 58 extending obliquely relative to the axial direction of the first liquid guiding tube 50 is provided on the outer peripheral wall of the first liquid guiding tube 50, and a limiting groove 1131 is provided on the peripheral wall of the rotating shaft inner cavity 113, and the limiting strut 58 cooperates with the limiting groove 1131.

[0112] Specifically, the cooperation between the limiting strut 58 and the limiting groove 1131 is used to install and fix the first liquid guide tube 50. The cooperation between the limiting strut 58 and the limiting groove 1131 has a positioning effect on the one hand, which simplifies the assembly process of the first liquid guide tube 50, so that the oil guide tube can be more easily installed in the correct position. Further, the cooperation between the limiting strut 58 and the limiting groove 1131 can control the position of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft, prevent the first liquid guide tube 50 from rotating or displacing the rotating shaft 11, reduce unnecessary movement and friction of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft, thereby reducing wear and extending the service life of the first liquid guide tube 50 and related components. At the same time, it is also convenient for subsequent maintenance and replacement work. In addition, the cooperation between the limiting support rod 58 and the limiting groove 1131 provides additional support and fixing, enhances the stability of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft, prevents displacement caused by vibration or pressure changes, and thus ensures the long-term stable operation of the motor assembly 1000.

[0113] See also Figure 4 and Fig.11 In some embodiments, a sealing ring 40 is provided on the outer peripheral wall of the oil outlet hole 53 , and the sealing ring 40 is used to seal the gap between the outer peripheral wall of the oil outlet hole 53 and the inner wall of the shaft inner cavity 113 .

[0114] Specifically, the sealing ring 40 is used to seal the gap between the outer peripheral wall of the oil outlet hole 53 and the inner wall of the shaft inner cavity 113. The sealing ring 40 can be made of materials such as rubber, silicone, plastic or synthetic fiber. Among them, the rubber material includes but is not limited to natural rubber, nitrile rubber, fluororubber, polyurethane rubber, EPDM rubber or silicone rubber. The sealing ring 40 can be one or more, which is not limited in the present application. In one example, the sealing ring 40 is separately molded and sleeved on the outer peripheral wall of the first liquid guide tube 50; in another example, the sealing ring 40 is sleeved and molded on the outer peripheral wall of the oil outlet hole 53 in the form of rubber encapsulation. The sealing ring 40 can seal the gap between the outer peripheral wall of the oil outlet hole 53 and the inner wall of the shaft inner cavity 113, prevent the working fluid from flowing into the inner wall of the shaft inner cavity 113 from the gap, and avoid the working fluid from flowing into the shaft inner cavity 113 under the first working condition, resulting in the working fluid under different working conditions. In addition, the sealing ring 40 has low cost and does not occupy additional installation volume.

[0115] See also Figure 4 and Figure 5In some embodiments, the first flow channel S1 includes a first liquid inlet channel 310 , which is at least partially radially disposed, and the oil inlet port 55 of the first liquid guide tube 50 is clearance-matched with the first liquid inlet channel 310 .

[0116] Specifically, the oil inlet 55 of the first liquid guide tube 50 is clearance-matched with the first liquid inlet channel 310, that is, there is a certain space between the oil inlet 55 of the first liquid guide tube 50 and the first liquid inlet channel 310, so when the first liquid guide tube 50 rotates with the rotating shaft 11, the first liquid guide tube 50 and the first liquid inlet channel 310 will not directly contact, thereby reducing the friction and wear of the first liquid guide tube 50. The clearance fit can also store lubricating oil and compensate for errors, such as manufacturing errors, assembly errors, and thermal expansion and contraction caused by temperature changes. The clearance fit also helps to reduce vibration and noise, and absorb the impact caused by imbalance or misalignment of rotating parts.

[0117] See also Figure 4 and Figure 5 In some embodiments, the gap between the oil inlet 55 of the first liquid guide tube 50 and the first liquid inlet channel 310 has a value range of greater than or equal to 0.1 mm and less than or equal to 1 mm.

[0118] Specifically, the gap between the oil inlet 55 of the first liquid guiding pipe 50 and the first liquid inlet channel 310 may be 0.1 mm, 0.11 mm, 0.21 mm, 0.31 mm, 0.34 mm, 0.45 mm, 0.54 mm, 0.64 mm, 0.81 mm or 1 mm.

[0119] If the gap between the oil inlet 55 of the first liquid guide tube 50 and the first liquid inlet channel 310 is less than 0.1 mm, the gap is too small, and the first liquid guide tube 50 and the first liquid inlet channel 310 are easily in contact during the process of the first liquid guide tube 50 rotating with the rotating shaft 11, resulting in friction and wear of the first liquid guide tube 50. If the gap between the oil inlet 55 of the first liquid guide tube 50 and the first liquid inlet channel 310 is greater than 1 mm, the gap is too large, and it is not easy to align the oil inlet 55 with the first liquid inlet channel 310. When the working fluid enters the first liquid guide tube 50 from the oil inlet 55, it is easy to flow out, which also causes a waste of space.

[0120] The value range of the gap between the oil inlet 55 of the first liquid guiding tube 50 and the first liquid inlet channel 310 is greater than or equal to 0.1 mm and less than or equal to 1 mm. The gap size is moderate, so that when the first liquid guiding tube 50 rotates with the rotating shaft 11, the first liquid guiding tube 50 and the first liquid inlet channel 310 will not be in direct contact, thereby reducing the friction and wear on the first liquid guiding tube 50, and ensuring that the working fluid can smoothly enter the oil inlet 55 from the first liquid inlet channel 310, and then enter the first liquid guiding tube 50.

[0121] See also Figures 4 to 7 ,as well as Fig.11 and Fig.12 In some embodiments, a limiting boss 59 is provided on the end face of the first liquid guiding tube 50 , a limiting surface 1133 is provided on the inner wall of the rotating shaft inner cavity 113 , a limiting groove 11335 is provided on the limiting surface 1133 , and the limiting boss 59 cooperates with the limiting groove 11335 .

[0122] Specifically, the end surface of the first liquid guiding tube 50 is provided with a limiting boss 59, and the inner wall of the rotating shaft inner cavity 113 is provided with a limiting surface 1133, wherein the limiting surface 1133 is provided with a limiting groove 11335, so that the limiting boss 59 and the limiting groove 11335 can be accurately matched. The matching of the limiting boss 59 and the limiting groove 11335 is used to install and fix the first liquid guiding tube 50. The matching of the limiting boss 59 and the limiting groove 11335 has a positioning effect on the one hand, simplifies the assembly process of the first liquid guiding tube 50, and makes it easier to install the oil guiding tube in the correct position. Furthermore, the cooperation between the limiting boss 59 and the limiting groove 11335 can control the position of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft, prevent the first liquid guide tube 50 from rotating or displacing the rotating shaft 11, reduce the movement and friction of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft, thereby reducing wear and extending the service life of the first liquid guide tube 50 and related components. It is also convenient for subsequent maintenance and replacement. In addition, the cooperation between the limiting support rod 58 and the limiting groove 1131 provides additional support and fixing, enhances the stability of the first liquid guide tube 50 in the inner cavity 113 of the rotating shaft, prevents displacement caused by vibration or pressure changes, and thus ensures the long-term stable operation of the motor assembly 1000. Furthermore, the limiting support rod 58 and the limiting boss 59 are respectively located on the opposite sides of the first liquid guiding tube 50 in the first direction. On the one hand, they can fix the two sides of the first liquid guiding tube 50, and on the other hand, they also have a fool-proof design to ensure that the first liquid guiding tube 50 is installed in the correct position at the first end 101 and the second end 102 of the rotating shaft 11.

[0123] See also Figures 4 to 7 ,as well as Fig.11 and Fig.12 In some embodiments, the limiting support rod 58 extends obliquely relative to the axial direction of the first catheter 50.

[0124] Specifically, the limiting strut 58 extends from the first liquid guiding tube 50 to a direction away from the first liquid guiding tube 50, and the extending direction has a certain angle with the axial direction of the first liquid guiding tube 50, and the angle can be 20°, 30° or 45°, etc., which is not limited in the present application. The limiting strut 58 extends axially and tilted, and can be more closely matched with the limiting groove 1131 of the rotating shaft inner cavity 113, so as to fix the first liquid guiding tube 50 in the rotating shaft inner cavity 113, prevent the first liquid guiding tube 50 from being displaced due to vibration or pressure change during operation, and ensure its stability in the rotating shaft inner cavity 113. Furthermore, the extending direction of the limiting strut 58 is opposite to the installation direction of the limiting strut 58, that is, the limiting strut 58 extends from the first liquid guiding tube 50 to a position away from the center of the first liquid guiding tube 50, so as to prevent the limiting strut 58 from slipping off the rotating shaft 11.

[0125] See also Figure 6 , Figure 7 as well as Fig.11 In some embodiments, an oil outlet hole 53 is provided on the first liquid guide tube 50, and a first shaft oil hole 115 is provided on the shaft 11. The shaft hole 115 is connected to the oil outlet hole 53 and to the first liquid guide channel S12, thereby connecting the first liquid guide tube 50 and the first liquid guide channel S12.

[0126] Specifically, the end plate 15 is provided with a first liquid guide channel S12, which may be one or more, and is not limited in the present application. The number of the first shaft oil hole 115 and the oil outlet hole 53 is not limited in the present application, that is, the number of the first shaft oil hole 115 and the oil outlet hole 53 may be one or more. The opening shapes of the first shaft oil hole 115 and the oil outlet hole 53 are also not limited.

[0127] When the motor 100 is in the first working condition, since the first liquid guide tube 50 is provided with an oil outlet hole 53 connected to the working medium, the working medium can flow out from the oil outlet hole 53, and one end of the first shaft oil hole 115 is connected to the oil outlet hole 53, so the working medium can flow from the oil outlet hole 53 to the first shaft oil hole 115, and the other end of the first shaft oil hole 115 is connected to the first liquid guide channel S12, and the working medium enters the first liquid guide channel S12 from the first shaft oil hole 115, and is finally thrown to the stator 31 and the stator winding 33 by the centrifugal force of the rotor 13, thereby cooling the stator 31 and the stator winding 33.

[0128] In some embodiments, the oil outlet hole 53 protrudes relative to the first liquid conduit 50 .

[0129] Specifically, the oil outlet hole 53 protrudes relative to the first liquid guiding tube 50 , which can shorten the distance between the oil outlet hole 53 and the rotating shaft 11 and prevent the first liquid guiding tube 50 from being enlarged as a whole.

[0130] In some embodiments, there are at least two oil outlet holes 53, which are distributed along the circumference of the first liquid guide tube 50, and there is an angle V1 between the two oil outlet holes. The value range of the angle V1 is greater than or equal to 0° and less than or equal to 180°.

[0131] Specifically, the value of the angle V1 can be 20°, 30°, 40°, 50°, 60°, 70°, 90°, 110°, 150° or 180°. When the angle V1 is too small, the two adjacent oil outlet holes 53 are too close together, and the side wall thickness of the two adjacent oil outlet holes 53 is limited, which affects the structural strength of the first liquid guide tube 50. When the angle V1 is too small, the two adjacent oil outlet holes 53 are too sparse, which wastes the space of the first liquid guide tube 50 on the one hand, and easily leads to poor flow of the working fluid and uneven heat distribution on the other hand, affecting the uniform distribution and flow efficiency of the working fluid and affecting the cooling effect.

[0132] The value range of the angle V1 is greater than or equal to 0° and less than or equal to 180°. It can ensure uniform flow of the working fluid and improve cooling efficiency without affecting the structural strength of the first liquid guide tube 50, ensure that the working fluid is evenly distributed near the oil outlet, improve the working fluid flow efficiency and cooling effect, and also help reduce the risk of fatigue damage of components.

[0133] See also Figure 4 , Figure 5 , Figure 7 , Fig.11 as well as Fig.12 In some embodiments, the oil outlet hole 53 includes a first oil outlet hole 531 and a second oil outlet hole 532 distributed along the axial direction of the first liquid guide tube 50, and the shaft hole 115 includes a first shaft hole 1151 and a second shaft hole 1152 distributed along the axial direction of the shaft 11, the first shaft hole 1151 is connected to the first oil outlet hole 531, and the second shaft hole 1152 is connected to the second oil outlet hole 532.

[0134] Specifically, in the embodiment where the oil outlet hole 53 is multiple, the oil outlet hole 53 includes a first oil outlet hole 531 and a second oil outlet hole 532, and the first oil outlet hole 531 and the second oil outlet hole 532 are multiple, wherein the first oil outlet hole 531 is closer to the first liquid inlet 310 than the second oil outlet hole 532. In the present application, there are four first oil outlet holes 531 and four second oil outlet holes. The first shaft oil hole 115 includes a first shaft hole 1151 and a second shaft hole 1152, and the first shaft hole 1151 and the second shaft hole 1152 are multiple, wherein the first shaft hole 1151 is closer to the first liquid inlet 310 than the second shaft hole 1152. In the present application, there are four first oil outlet holes 531 and four second oil outlet holes 532. It can be understood that the multiple first oil outlet holes 531 are connected to the multiple first shaft holes 1151, and the multiple second oil outlet holes 532 are connected to the multiple second shaft holes 1152.

[0135] Under the first working condition, the working medium enters the first liquid guide tube 50 from the first liquid inlet channel 310. Since the first liquid guide tube 50 includes the first oil outlet hole 531 and the second oil outlet hole 532 axially distributed in the first direction, the working medium entering the first oil guide tube 501 enters the first axial hole 1151 and the second axial hole 1152 through the first oil outlet hole 531 and the second oil outlet hole 532 respectively.

[0136] The working medium flows out from the first liquid guiding pipe 50 to the first oil outlet hole 531 and the first axial hole 1151, and then enters the first liquid guiding channel S12 of the first end plate 151. During the rotation of the first end plate 151, the working medium is thrown toward the stator winding 33 close to the first end plate 151, thereby cooling the stator winding 33; the working medium flows out from the first liquid guiding pipe 50 to the second oil outlet hole 532 and the second axial hole 1152, and then enters the first liquid guiding channel S12 of the second end plate 152. During the rotation of the second end plate 152, the working medium is thrown toward the stator winding 33 close to the second end plate 152, thereby cooling the stator winding 33.

[0137] The first flow channel S1 can throw out the working medium from the two end plates 15 through the first oil outlet hole 531 and the second oil outlet hole 532. The first oil outlet hole 531 and the second oil outlet hole 532 correspond to different positions of the stator winding 33, so the stator winding 33 can be cooled by throwing oil from two positions, and the cooling is more uniform.

[0138] See also Figure 4 , Figure 5 , Fig.11 as well as Fig.13 In some embodiments, there are multiple first oil outlet holes 531, and the multiple first oil outlet holes 531 are distributed along the circumference of the first liquid guiding tube 50. There are multiple second oil outlet holes 532, and the multiple second oil outlet holes 532 are distributed along the circumference of the first liquid guiding tube 50. In the axial direction of the first liquid guiding tube 50, there is a minimum internal angle X between the first oil outlet hole 531 and the second oil outlet hole 532, and the value range of the minimum internal angle X is greater than or equal to 0° and less than or equal to 180°.

[0139] Specifically, the value of the minimum inner angle X can be 20°, 30°, 40°, 50°, 60°, 70°, 90°, 110°, 150° or 180°. Since a plurality of rotor magnets 131 are provided in the rotor 13, there are skewed poles between the plurality of rotor magnets 131, and the skewed poles are used to reduce tooth harmonics, harmonic torque and vibration noise. Specifically, the skewed poles are made into a skewed slot structure by twisting and stacking the silicon steel sheets so that the rotor 13 is twisted as a whole by an angle (usually one stator 31 slot pitch). The skewed poles make the tooth harmonics of the stator winding 33 different in phase, thereby offsetting a portion of the tooth harmonics, thereby achieving the effect of reducing harmonic torque and reducing vibration noise. Therefore, there is a certain twist angle between the rotor magnet 131 located at the first end 101 and the second section of the rotating shaft 11, and the rotating shaft 11 needs to adapt to the oblique pole. Correspondingly, there is a minimum inner angle X between the first oil outlet hole 531 and the first oil outlet hole 531 that are connected to the first shaft hole 1151 and the second shaft hole 1152, and the minimum inner angle X is related to the oblique level. If there is no minimum inner angle X between the first oil outlet hole 531 and the second oil outlet hole 532, the first liquid guide tube 50 cannot adapt to the oblique pole of the rotor 13. If the minimum inner angle X between the first oil outlet hole 531 and the second oil outlet hole 532 is greater than 180°, it still cannot adapt to the oblique level of the rotor 13. Therefore, the value range of the minimum inner angle X is greater than or equal to 0° and less than or equal to 180°, which can make the alignment relationship between the first liquid guide tube 50 and the rotating shaft 11 and the rotor 13 accurate.

[0140] See also Figure 4 , Figure 5 , Fig.11 as well as Fig.14 In some embodiments, there are multiple first oil outlet holes 531 and multiple second oil outlet holes 532, and the multiple first oil outlet holes 531 are distributed around the axis of the first liquid guide tube 50, and the multiple second oil outlet holes 532 are distributed around the axis of the first liquid guide tube 50. There is an angle Y between two adjacent first oil outlet holes 531 or two adjacent second oil outlet holes 532, and the value range of the angle Y is greater than or equal to 0° and less than or equal to 180°.

[0141] Specifically, the value of the angle Y can be 20°, 30°, 40°, 50°, 60°, 70°, 90°, 110°, 150° or 180°. When the angle Y is too small, the two adjacent first oil outlet holes 531 or the two adjacent second oil outlet holes 532 are too compact, and the side wall thickness of the two adjacent first oil outlet holes 531 or the two adjacent second oil outlet holes 532 is limited, which affects the structural strength of the first liquid guide tube 50. When the angle Y is too small, the two adjacent first oil outlet holes 531 or the two adjacent second oil outlet holes 532 are too sparse, which wastes the space of the first liquid guide tube 50 on the one hand, and easily leads to poor flow of the working fluid and uneven heat distribution on the other hand, which affects the uniform distribution and flow efficiency of the working fluid and affects the cooling effect.

[0142] The value range of the angle Y is greater than or equal to 0° and less than or equal to 180°. It can ensure uniform flow of the working fluid and improve cooling efficiency without affecting the structural strength of the first liquid guide tube 50, ensure that the working fluid is evenly distributed near the oil outlet, improve the working fluid flow efficiency and cooling effect, and also help reduce the risk of fatigue damage of components.

[0143] Furthermore, in some embodiments, the angle Y between two adjacent first oil outlet holes 531 and the angle Y between two adjacent second oil outlet holes 532 may be different.

[0144] The implementation with the same angle Y is conducive to the processing and forming of the first oil outlet hole 531 and the second oil outlet hole 532, and improves the forming efficiency. The implementation with different angles Y can provide two different working fluid flow characteristics to meet different working conditions. For example, different angle configurations can optimize the distribution and flow path of the working fluid to improve the cooling effect of a specific area. In some cases, it may be necessary to provide stronger cooling in certain areas, while reducing the working fluid flow in other areas to optimize efficiency.

[0145] See also Figures 1 to 5 In some embodiments, the motor 100 includes a first motor 110 and a second motor 120. The first motor 110 is provided with a first flow channel S1 and a second flow channel S2. The first flow channel S1 is used to cool the first stator 31 of the first motor 110. The second flow channel S2 is used to cool the first rotor magnet 131 of the first motor 110. The second motor 120 is provided with a third flow channel and a fourth flow channel. The third flow channel is used to cool the second stator 31 of the second motor 120. The fourth flow channel is used to cool the second rotor magnet 131 of the second motor 120.

[0146] Specifically, the motor 100 of the motor assembly 1000 can be one or more. For example, in the present application, there are two motors 100, and the first motor 110 and the second motor 120 are symmetrically arranged in the box 300. Among them, symmetry means that the first motor 110 and the second motor 120, under this setting, take the rotating shaft 11 as an example, the first ends 101 of the rotating shafts 11 of the two motors 100 are opposite. It can be understood that the first motor 110 and the second motor 120 at least include the beneficial effects of the motor 100, and it can be understood that the third flow channel at least includes the beneficial effects of the first flow channel S1, and the fourth flow channel at least includes the beneficial effects of the second flow channel S2.

[0147] See also Figures 1 to 5 In some embodiments, the first flow channel S1 includes a first liquid inlet channel 310 , and the third flow channel includes a third liquid inlet channel. The third liquid inlet channel and the first liquid inlet channel 310 are the same liquid inlet pipe.

[0148] Specifically, the third liquid inlet channel and the first liquid inlet channel 310 are the same liquid inlet pipe, so that the first motor 110 and the second motor 12 can share the same liquid inlet pipe, saving space of the motor assembly 1000.

[0149] See also Figures 1 to 5 In some embodiments, the first flow channel S1 includes a first liquid inlet channel 310 , and the third flow channel includes a third liquid inlet channel, and the third liquid inlet channel is disposed adjacent to the first liquid inlet channel 310 .

[0150] Specifically, in one embodiment, the third liquid inlet and the first liquid inlet 310 are arranged between the first motor 110 and the second motor 120, the third liquid inlet is used to introduce the working fluid into the second motor 120, and the first liquid inlet 310 is used to introduce the working fluid into the first motor 110. That is, each motor 100 has an independent liquid inlet pipe, and the distribution of the working fluid flow is more balanced and independent. Therefore, the oil circuit problem of one motor 100 will not affect the oil circuit of another motor 100, thereby improving the reliability and stability of the motor 100. The third liquid inlet is arranged adjacent to the first liquid inlet 310, so the third liquid inlet is close to the first liquid inlet 310, that is, they are independent of each other and have a close layout, which is conducive to the unified management of the third liquid inlet and the first liquid inlet 310.

[0151] See also Figures 1 to 5 In some embodiments, the first flow channel S1 includes a first liquid inlet channel 310 , the third flow channel includes a third liquid inlet channel, and the third liquid inlet channel and the first liquid inlet channel 310 are disposed between the first motor 110 and the second motor 120 .

[0152] Specifically, the third liquid inlet channel and the first liquid inlet channel 310 are arranged between the first motor 110 and the second motor 120 . On the one hand, they are closely spaced, that is, independent of each other, and on the other hand, they are closely arranged, which is conducive to the unified management of the third liquid inlet channel and the first liquid inlet channel 310 .

[0153] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. At the same time, other embodiments can be derived from the above-mentioned embodiments, so that structural and logical replacements and changes can be made without departing from the scope of this disclosure.

[0154] The above-mentioned embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of this application shall be based on the attached claims.

Claims

1. A motor assembly (1000), the motor assembly (1000) comprising a motor (100), characterized in that: The motor (100) comprises: Rotor (13); stator (31); A first flow channel (S1) for circulating a working medium, wherein the first flow channel (S1) is used for cooling the stator (31); and A second flow channel (S2) for circulating a working medium, wherein the second flow channel (S2) is at least used for cooling the rotor (13); When the motor (100) is in a first operating condition, the first flow channel (S1) works; when the motor (100) is in a second operating condition, the second flow channel (S2) works, or both the second flow channel (S2) and the first flow channel (S1) work, wherein the first operating condition is different from the second operating condition.

2. The motor assembly (1000) according to claim 1, characterized in that: The second flow channel (S2) is provided with a switch valve (90), and the switch valve (90) is used to open or close the second flow channel (S2); or, The second flow channel (S2) and the first flow channel (S1) are both provided with a switch valve (90), and the switch valve (90) is used to open or close the first flow channel (S1) and the second flow channel (S2).

3. The motor assembly (1000) according to claim 1, characterized in that: The rotor (13) comprises a rotor magnetic steel (131), and the second flow channel (S2) is used for cooling the rotor magnetic steel (131).

4. The motor assembly (1000) according to claim 3, characterized in that: When the motor (100) is in the second operating condition, the temperature of the rotor (13) or the rotor magnetic steel (131) is greater than the temperature of the rotor (13) or the rotor magnetic steel (131) in the first operating condition; or When the motor (100) is in the second operating condition, the temperature rise rate of the rotor (13) or the rotor magnetic steel (131) is greater than the temperature rise rate of the rotor (13) or the rotor magnetic steel (131) in the first operating condition.

5. The motor assembly (1000) according to claim 1, characterized in that: The first operating condition includes a motor driving condition; the second operating condition includes a motor charging condition or a motor self-heating condition.

6. The motor assembly (1000) according to any one of claims 1 to 5, characterized in that: The motor assembly (1000) further comprises a rotating shaft (11) and two end plates (15); the rotor (13) and the end plates (15) are sleeved on the rotating shaft (11); the rotor (13) is located between the two end plates (15); and the second flow channel (S2) is configured to allow the working fluid to flow through the rotating shaft (11) and the end plates (15) and then reach the rotor (13).

7. The motor assembly (1000) according to claim 6, characterized in that: The second flow channel (S2) is configured to allow the working medium to flow through the rotating shaft (11), the end plate (15) and the rotor (13) and then reach the stator (31).

8. The motor assembly (1000) according to claim 6, characterized in that: A second flow passage (S21) is provided in the rotating shaft (11); the end plate (15) and the rotor (13) form a second liquid guide passage (S22); the second flow passage (S21) and the second liquid guide passage (S22) are in communication; the second flow passage (S2) includes the second flow passage (S21) and the second liquid guide passage (S22); the working fluid enters the second liquid guide passage (S22) from the second flow passage (S21) and reaches the rotor (13) to cool the rotor (13).

9. The motor assembly (1000) according to claim 8, characterized in that: The end plate (15) is provided with a convection channel (157), the rotor magnetic steel (131) is provided with a rotor magnetic steel groove (1311), the convection channel (157) and the rotor magnetic steel groove (1311) are in communication, and the second liquid guide channel (S22) comprises: a convection channel (157) and the rotor magnetic steel groove (1311).

10. The motor assembly (1000) according to claim 9, characterized in that: The end plate (15) includes two, and the convection channel (157) includes a first convection channel (1571) and a second convection channel (1572). The first convection channel (1571) is connected to the second flow channel (S21) and the rotor magnetic steel slot (1311), and the second convection channel (1572) is connected to the rotor magnetic steel slot (1311). The working fluid enters the first convection channel (1571) of one end plate (15) from the second flow channel (1572) of one end plate (15), then enters the rotor magnetic steel slot (1311), and then enters the second convection channel (1572) of the other end plate (15).

11. The motor assembly (1000) according to claim 8, characterized in that: The second flow channel (S2) further comprises a second liquid inlet channel (320), wherein the second liquid inlet channel (320) is at least partially arranged along the axial direction of the motor (100), and the working medium reaches the rotor (13) from the second liquid inlet channel (320) through the second liquid guide channel (S22) to cool the rotor (13).

12. The motor assembly (1000) according to claim 11, characterized in that: The motor assembly (1000) further comprises an end cover (60), at least a portion of the second liquid inlet channel (320) is disposed on the end cover (60), and the second liquid inlet channel (320) extends on the end cover (60) along the radial direction of the motor (100).

13. The motor assembly (1000) according to claim 12, characterized in that: The inlet of the second liquid inlet channel (320) is arranged at the end cover (60), and the switch valve (90) of the motor assembly (1000) is arranged at the inlet of the second liquid inlet channel (320).

14. The motor assembly (1000) according to claim 8, characterized in that: The first flow channel (S1) is configured to allow the working medium to flow through the rotating shaft (11) and the end plate (15) and then reach the stator (31).

15. The motor assembly (1000) according to claim 8, characterized in that: The end plate (15) is also provided with a first liquid guiding channel (S12), the first liquid guiding channel (S12) includes a plurality of them, the end plate (15) includes a plurality of convection channels (157), and the plurality of the first liquid guiding channels (S12) and the convection channels (157) are arranged at intervals.

16. The motor assembly (1000) according to claim 15, characterized in that: A first flow passage (S11) is provided in the rotating shaft (11); the first flow passage (S11) and the second flow passage (S21) are not connected, and the first liquid guiding passage (S12) and the second liquid guiding passage (S22) are not connected; the first flow passage (S1) includes the first flow passage (S11) and the first liquid guiding passage (S12); the working fluid passes through the first flow passage (S11) and the first liquid guiding passage (S12) to reach the stator (31) so as to cool the stator (31).

17. The motor assembly (1000) according to claim 16, characterized in that: The motor assembly (1000) further comprises a first liquid conduit (50), the rotating shaft (11) is sleeved on the first liquid conduit (50), the first flow passage (S11) comprises the first liquid conduit (50), a flow gap is formed between the inner wall of the rotating shaft (11) and the outer wall of the first liquid conduit (50), and the second flow passage (S21) comprises the flow gap.

18. The motor assembly (1000) according to claim 12, characterized in that: The rotating shaft (11) is provided with a second rotating shaft oil hole (117), and the second rotating shaft hole (117) is communicated with the flow gap, thereby communicating with the second liquid inlet channel (320) and the second liquid guide channel (S22).

19. The motor assembly (1000) according to claim 17, characterized in that: The first liquid guiding tube (50) is assembled into the rotating shaft inner cavity (113) of the rotating shaft (11) through axial and radial limiting.

20. The motor assembly (1000) according to claim 19, characterized in that: A limiting support rod (58) is provided on the outer peripheral wall of the first liquid guiding tube (50), and a limiting groove (1131) is provided on the inner wall of the rotating shaft inner cavity (113), and the limiting support rod (58) cooperates with the limiting groove (1131).

21. The motor assembly (1000) according to claim 20, characterized in that: The limiting support rod (58) extends obliquely relative to the axial direction of the first liquid guiding tube (50).

22. The motor assembly (1000) according to claim 19, characterized in that: The first flow channel (S1) comprises a first liquid inlet channel (310), the first liquid inlet channel (310) is at least partially radially arranged, and the oil inlet port (55) of the first liquid guide tube (50) is clearance-matched with the first liquid inlet channel (310).

23. The motor assembly (1000) according to claim 22, characterized in that: The gap between the oil inlet (55) of the first liquid guide tube (50) and the first liquid inlet channel (310) has a value range of greater than or equal to 0.1 mm and less than or equal to 1 mm.

24. The motor assembly (1000) according to claim 23, characterized in that: The first liquid guiding tube (50) is provided with an oil outlet hole (53), the rotating shaft (11) is provided with a first rotating shaft oil hole (115), the rotating shaft hole (115) is communicated with the oil outlet hole (53) and is communicated with the first liquid guiding channel (S12), thereby connecting the first liquid guiding tube (50) and the first liquid guiding channel (S12).

25. The motor assembly (1000) according to claim 24, characterized in that: The outer peripheral wall of the oil outlet hole (53) is provided with a sealing ring (40), and the sealing ring (40) is used to seal the gap between the outer peripheral wall of the oil outlet hole (53) and the inner wall of the rotating shaft inner cavity (113).

26. The motor assembly (1000) according to claim 24, characterized in that: The oil outlet hole (53) protrudes relative to the first liquid guide tube (50).

27. The motor assembly (1000) according to claim 24, characterized in that: There are at least two oil outlet holes (53), and the two oil outlet holes (53) are distributed along the circumference of the first liquid guide tube (50). There is an angle V1 between the two oil outlet holes, and the value range of the angle V1 is greater than or equal to 0° and less than or equal to 180°.

28. The motor assembly (1000) according to claim 24, characterized in that: The oil outlet hole (53) comprises a first oil outlet hole (531) and a second oil outlet hole (532) distributed along the axial direction of the first liquid guide tube (50); the rotating shaft hole (115) comprises a first shaft hole (1151) and a second shaft hole (1152) distributed along the axial direction of the rotating shaft (11); the first shaft hole (1151) is connected to the first oil outlet hole (531); and the second shaft hole (1152) is connected to the second oil outlet hole (532).

29. The motor assembly (1000) according to claim 28, characterized in that: There are a plurality of first oil outlet holes (531), and the plurality of first oil outlet holes (531) are distributed along the circumference of the first liquid guiding tube (50); there are a plurality of second oil outlet holes (532), and the plurality of second oil outlet holes (532) are distributed along the circumference of the first liquid guiding tube (50); in the axial direction of the first liquid guiding tube (50), there is a minimum inner angle X between the first oil outlet holes (531) and the second oil outlet holes (532); the value range of the minimum inner angle X is greater than or equal to 0° and less than or equal to 180°.

30. The motor assembly (1000) according to claim 28, characterized in that: There are a plurality of the first oil outlet holes (531) and the second oil outlet holes (532), and the plurality of the first oil outlet holes (531) are distributed around the axis of the first liquid guiding tube (50), and the plurality of the second oil outlet holes (532) are distributed around the axis of the first liquid guiding tube (50). An angle Y is provided between two adjacent first oil outlet holes (531) or two adjacent second oil outlet holes (532), and the value range of the angle Y is greater than or equal to 0° and less than or equal to 180°.

31. The motor assembly (1000) according to claim 8, characterized in that: The motor (100) comprises a first motor (100) and a second motor (100), the first motor (100) being provided with the first flow channel (S1) and the second flow channel (S2), the first flow channel (S1) being used for cooling a first stator (311) of the first motor (100), the second flow channel (S2) being used for cooling a first rotor magnetic steel (1311) of the first motor (100), The second motor (100) is provided with a third flow channel (S3) and a fourth flow channel (S4), the third flow channel (S3) being used to cool a second stator (312) of the second motor (100), and the fourth flow channel (S4) being used to cool a second rotor magnet (1312) of the second motor (100).

32. The motor assembly (1000) according to claim 31, characterized in that: The first flow channel (S1) includes a first liquid inlet channel (310), and the third flow channel (S3) includes a third liquid inlet channel. The third liquid inlet channel and the first liquid inlet channel (310) are the same liquid inlet pipe.

33. The motor assembly (1000) according to claim 31, characterized in that: The first flow channel (S1) includes a first liquid inlet channel (310), and the third flow channel (S3) includes a third liquid inlet channel, and the third liquid inlet channel is arranged adjacent to the first liquid inlet channel (310).

34. The motor assembly (1000) according to claim 31, characterized in that: The first flow channel (S1) includes a first liquid inlet channel (310), the third flow channel (S3) includes a third liquid inlet channel, and the third liquid inlet channel and the first liquid inlet channel (310) are arranged between the first motor (100) and the second motor (100).

35. The motor assembly (1000) according to claim 8, characterized in that: The motor assembly (1000) further comprises a reducer (200), the reducer (200) comprising an input shaft (70) of the motor assembly (1000), an end cover (60) of the motor assembly (1000) being arranged on the reducer (200), the input shaft (70) being connected to the rotating shaft (11); a second liquid inlet channel (320) of the motor assembly (1000) being partly arranged on the end cover (60), and a second liquid inlet channel (320) being partly arranged on the input shaft; the input shaft (70) A second liquid guide tube (80) is provided in the input shaft inner cavity (71), and the second liquid guide tube (80) is also provided with a second oil guide cavity (81). The second liquid guide tube (80) is connected with the rotating shaft inner cavity (113) through the input shaft inner cavity (71), and the second liquid inlet channel (320) extends along the radial direction of the motor (100) in the end cover (60); the working medium flows into the end cover (60) from the inlet of the second liquid inlet channel (320) and reaches the input shaft (70), and then reaches the rotating shaft (11) through the input shaft (70).

36. A vehicle (10000), characterized in that: include: The motor assembly (1000) according to any one of claims 1 to 35.

Images