Driving device and vehicle with same

Abstract

The utility model discloses a driving device and a vehicle with the same, the driving device comprises a motor, the motor comprises a shell and a stator assembly, the interior of the shell is hollow to form a containing cavity, the stator assembly comprises a stator winding, the stator winding is arranged in the containing cavity, and a first cooling flow channel is formed in the wall of the shell; the first cooling flow channel is suitable for being filled with cooling liquid, the first cooling flow channel communicates with the containing cavity through the first outlet flow channel, and the first outlet flow channel at least corresponds to the stator winding so as to convey the cooling liquid towards the stator winding. And the first cooling flow channel is directly formed in the wall of the shell, so that the cooling structure is simplified, the cooling difficulty is reduced, the cooling effect is improved, the service life of the motor is prolonged, and the working performance of the motor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle driving, in particular to a driving device and a vehicle with the same. BACKGROUND

[0002] The driving device is a power device of a vehicle, which usually transmits power to wheels of the vehicle to generate driving force, so that the vehicle can normally travel.

[0003] Among them, with the development of vehicle driving device to high power density, the motor also develops to high power density and high speed, which leads to the increasing heat of the motor.

[0004] In the prior art, in order to reduce the heat of the motor, a complex oil guide is usually arranged outside the motor to cool the motor, which leads to high cooling cost of the motor and increases the volume and assembly difficulty of the driving device. UTILITY MODEL CONTENT

[0005] The embodiments of the present application provide a driving device and a vehicle with the same, which can cool the motor while reducing the cooling cost and making the driving device compact.

[0006] In the first aspect, the embodiments of the present application provide a driving device, comprising: a motor, the motor comprising: a shell and a stator assembly, the shell is internally hollow to form a containing cavity, the stator assembly comprises a stator winding, the stator winding is arranged in the containing cavity, a first cooling flow channel is formed in the wall of the shell, the first cooling flow channel is suitable for filling cooling liquid, the first cooling flow channel is communicated with the containing cavity through a first outlet flow channel, the first outlet flow channel is arranged at least corresponding to the stator winding to transport cooling liquid to the stator winding.

[0007] In the above technical solution, by forming the first cooling flow channel in the wall of the shell, the stator winding is cooled by the cooling liquid, and the setting of various complex oil guides is cancelled, the structure of the driving device is simplified, the volume of the driving device is reduced, the manufacturing cost of the driving device is reduced, the heat dissipation effect of the cooling liquid on the motor is improved, and the position of the cooling liquid transported to the stator winding is adjusted more flexibly, so that the driving device of the present application has the advantages of low manufacturing cost, compact structure, excellent heat dissipation effect, and flexible adjustment of the cooling position.

[0008] In some embodiments, the shell has a side wall extending along the axial direction of the motor, and at least part of the first cooling flow channel is arranged in the side wall.

[0009] In the technical solution, the first cooling flow channel is formed in the wall of the shell, the first cooling flow channel is integrated with the shell, and various complex oil guiding components can be cancelled.

[0010] In some embodiments, the first outlet flow channel comprises a first communication section and a first outlet formed on the inner circumferential wall of the side wall, and a flow area of the first outlet is smaller than a flow area of the first communication section.

[0011] In the technical solution, the forming difficulty of the first outlet flow channel is reduced, and the cooling liquid in the first cooling flow channel can be sprayed when flowing into the accommodating cavity through the first outlet, so that the cooling liquid in the first cooling flow channel can be sprayed to the stator winding, the stator winding is cooled by the cooling liquid, and the cooling effect is improved.

[0012] In some embodiments, at least part of the first cooling flow channel is formed in the hollow side wall; or the side wall comprises a main body and a sealing cover, a groove is arranged on the outer side wall of the main body, the sealing cover is arranged on the outer side wall of the main body and seals the groove, at least part of the first cooling flow channel is formed by cooperation of the sealing cover and the groove, and the first outlet flow channel is arranged on the main body.

[0013] In the technical solution, the first cooling flow channel is formed in the wall of the shell, the forming difficulty of the first cooling flow channel is reduced, and various complex oil guiding components arranged on the outer periphery of the motor can be avoided, so that the structure of the driving device is simplified.

[0014] In some embodiments, the stator assembly further comprises a stator core arranged in the accommodating cavity, the stator winding is arranged on the stator core, the shell further comprises a second outlet flow channel, the second outlet flow channel is in communication with the first cooling flow channel and the accommodating cavity, and the second outlet flow channel is opposite to the stator core.

[0015] In the technical solution, the stator core is cooled by the cooling liquid, the temperature of the stator core is reduced, the temperature of the motor is reduced, the service life of the motor is prolonged, and the working performance of the motor is ensured to a certain extent.

[0016] In some embodiments, the second outlet flow channel comprises a second communication section and a second outlet formed on the inner circumferential wall of the side wall, and a flow area of the second outlet is greater than a flow area of the second communication section.

[0017] In the technical solution, the stator core is prevented from blocking the second outlet, and part of the cooling liquid can be stored in the second outlet, so that the stator core is cooled by the cooling liquid, and the cooling effect on the stator core is improved.

[0018] In some embodiments, in the axial direction of the motor, part of the stator winding extends out of the stator core, and the first outlet flow channel and the second outlet flow channel are arranged in the axial direction of the motor so that the first outlet flow channel is opposite to the stator winding extending out of the stator core.

[0019] In the above technical solution, the cooling liquid discharged through the first outlet flow channel can be effectively output to the stator winding, achieving the purpose of cooling the stator core and the stator winding at the same time, and facilitating the improvement of the working performance of the motor.

[0020] In some embodiments, the driving device further comprises a flow channel assembly, at least part of the flow channel assembly is arranged on the radially inner side of the stator winding, the flow channel assembly is provided with a second cooling flow channel and a third outlet flow channel, the second cooling flow channel is communicated with the first cooling flow channel, and the third outlet flow channel is communicated with the second cooling flow channel and the third outlet of the third outlet flow channel is opposite to the radially inner side of the stator winding.

[0021] In the above technical solution, the cooling liquid is output to the radially inner side of the stator winding, the cooling liquid is further used to cool the stator winding, the temperature of the stator winding is reduced, which is conducive to reducing the temperature of the motor, prolonging the service life of the motor, and ensuring the working performance of the motor to a certain extent.

[0022] In some embodiments, the flow channel assembly extends in the circumferential direction of the stator winding, the second cooling flow channel is arranged close to the top of the flow channel assembly, and the third outlet flow channel is arranged on the top wall of the flow channel assembly.

[0023] In the above technical solution, the structure of the flow channel assembly is simplified, and the cooling effect of the flow channel assembly on the stator winding can be ensured.

[0024] In some embodiments, the third outlet flow channel comprises a plurality of third outlet flow channels, and the plurality of third outlet flow channels are arranged in the circumferential direction of the flow channel assembly.

[0025] In the above technical solution, the communication area between the second cooling flow channel and the radially inner side of the stator winding can be increased, so that the cooling liquid in the second cooling flow channel can effectively flow to the radially inner side of the stator winding, and the flow of the cooling liquid flowing to the radially inner side of the stator winding can be ensured to a certain extent, and the cooling effect on the stator winding can be improved.

[0026] In some embodiments, the maximum distance between any two points of the third outlet is 0.5mm-3mm.

[0027] In the above technical solution, the cooling liquid in the third outlet flow channel can flow to the radially inner side of the stator winding in a large amount and quickly, so as to cool the stator winding and improve the cooling effect.

[0028] In some embodiments, the stator assembly further comprises a stator core, in the axial direction of the motor, part of the stator winding extends out of the stator core, and the flow channel assembly is arranged entirely radially inward of the stator winding extending out of the stator core.

[0029] In the above technical solution, the flow channel assembly is used to deliver the cooling liquid radially inward of the stator winding, so as to cool the radially inner side of the stator winding, and the cooling difficulty of the flow channel assembly on the stator winding is reduced.

[0030] In some embodiments, the housing comprises a side wall and an end wall, the side wall extends in the axial direction of the motor, the end wall is arranged at one axial end of the side wall, and the flow channel assembly is arranged in the accommodating cavity and adjacent to the end wall; the first cooling flow channel comprises a main flow channel and a first branch flow channel which are in communication with each other, the main flow channel is arranged in the side wall, the first branch flow channel is arranged in the end wall, the first outlet flow channel is arranged in the side wall and communicates with the main flow channel, and the second cooling flow channel communicates with the first branch flow channel.

[0031] In the above technical solution, the second cooling flow channel is in communication with the first cooling flow channel, part of the cooling liquid in the first cooling flow channel is delivered to the second cooling flow channel, and then the second cooling flow channel is used to output the cooling liquid radially inward of the stator winding, so as to further cool the stator winding by the cooling liquid.

[0032] In some embodiments, the second cooling flow channel communicates with the first branch flow channel through a first throttling hole.

[0033] In the above technical solution, the flow of the cooling liquid used to cool the stator winding is controlled, and the cooling effect on the stator winding is improved.

[0034] In some embodiments, the motor further comprises a rotor assembly and a first support bearing, the rotor assembly is arranged radially inward of the stator assembly, the rotor assembly is coupled with the stator assembly, and the first support bearing is used to support a rotor shaft of the rotor assembly.

[0035] In the above technical solution, the working performance of the motor can be ensured.

[0036] In some embodiments, a fourth outlet flow channel communicating with the first branch flow channel is formed on the end wall, and the fourth outlet flow channel is used to deliver the cooling liquid toward the first support bearing.

[0037] In the technical scheme, the first support bearing can be cooled and lubricated by the cooling liquid, the service life of the first support bearing is prolonged, the friction between the first support bearing and the mover shaft is reduced, the rotation of the mover shaft is smoother, and the working performance of the mover shaft is ensured to a certain extent.

[0038] In some embodiments, the fourth outlet flow channel extends along an axial direction of the motor.

[0039] In the technical scheme, the cooling liquid guided out of the fourth outlet flow channel can be accurately transmitted to the first support bearing, and the cooling effect on the first support bearing is improved.

[0040] In some embodiments, the fourth outlet flow channel comprises a plurality of fourth outlet flow channels, and the plurality of fourth outlet flow channels are oppositely arranged along the axial direction of the motor.

[0041] In the technical scheme, the cooling effect of the cooling liquid on the first support bearing is further improved.

[0042] In some embodiments, the motor further comprises a magnetic ring, and the magnetic ring is arranged close to the first support bearing.

[0043] In the technical scheme, the magnetic ring is used to suppress the generation of shaft current, thereby avoiding the failure of the first support bearing and prolonging the service life of the first support bearing.

[0044] In some embodiments, the flow channel assembly is arranged close to the first support bearing, and the magnetic ring is fixed to the flow channel assembly.

[0045] In the technical scheme, the structure of the motor is simplified, the positional stability of the magnetic ring is improved, the fixing difficulty of the magnetic ring is reduced, and the working performance of the magnetic ring is ensured to a certain extent.

[0046] In some embodiments, the motor further comprises an end cover arranged on the other side of the axial direction of the side wall, and a third cooling flow channel is arranged in the peripheral wall of the end cover, and the third cooling flow channel is in communication with the main flow channel and the internal flow channel of the mover shaft, respectively.

[0047] In the technical scheme, the third cooling flow channel is used to output the cooling liquid in the main flow channel to the internal flow channel of the mover shaft, the mover shaft is cooled by the cooling liquid, the temperature of the mover shaft is reduced, the temperature of the motor is reduced, and the service life of the motor is further prolonged.

[0048] In some embodiments, the end cover comprises a first end cover and a second end cover, the first end cover is connected with the side wall, the second end cover is arranged radially inside the first end cover, the third cooling flow channel comprises a second branch flow channel and a third branch flow channel which are communicated with each other, the second branch flow channel is arranged in the first end cover and communicated with the main flow channel, and the third branch flow channel is arranged in the second end cover and communicated with the internal flow channel.

[0049] In the above technical solution, the communication difficulty between the main flow channel and the internal flow channel of the mover shaft is reduced, so that the cooling liquid in the main flow channel is conveniently delivered into the mover shaft, and the purpose of cooling the mover shaft by the cooling liquid is achieved.

[0050] In some embodiments, the second branch flow channel is communicated with the main flow channel through a second throttling hole.

[0051] In the above technical solution, the flow of the cooling liquid for cooling the mover shaft is conveniently controlled, and the cooling effect of the mover shaft is conveniently ensured.

[0052] In some embodiments, at the connection between the first end cover and the second end cover, a recess is arranged on one of the radial ends of the first end cover and the second end cover, and the other radial end of the first end cover and the second end cover is limitingly fitted in the recess and abuttingly fitted with the inner wall of the recess; the end of the second branch flow channel or the third branch flow channel is formed at the recess to realize the sealed fitting of the second branch flow channel and the third branch flow channel.

[0053] In the above technical solution, the fitting connection of the first end cover and the second end cover is realized, and the sealed fitting of the second branch flow channel and the third branch flow channel is also realized, and the difficulty of the sealed fitting of the second branch flow channel and the third branch flow channel is reduced.

[0054] In some embodiments, the driving device further comprises an output shaft connected with the mover shaft and a second support bearing for supporting the output shaft; a fifth outlet flow channel communicated with the third branch flow channel is formed on the second end cover, and the fifth outlet flow channel is used for delivering the cooling liquid towards the second support bearing.

[0055] In the above technical solution, the second support bearing is conveniently cooled and lubricated by the cooling liquid, the service life of the second support bearing is prolonged, and the friction between the second support bearing and the output shaft is reduced, so that the rotation of the output shaft is smoother, and the working performance of the output shaft is ensured to a certain extent.

[0056] In some embodiments, the end cover is provided with a cooling cavity, and a conductive connecting piece adapted to be electrically connected with an external electric connection is arranged in the cooling cavity, and the conductive connecting piece is used to be electrically connected with the stator winding; a fourth cooling flow channel is arranged in the end cover, and the fourth cooling flow channel is communicated with the first cooling flow channel, and the fourth cooling flow channel is provided with a sixth outlet flow channel communicated with the cooling cavity.

[0057] In the above technical solution, the cooling liquid in the first cooling flow channel can be conveniently output into the cooling cavity, so that the conductive connecting piece is cooled by the cooling liquid, the temperature of the conductive connecting piece is reduced, the service life of the conductive connecting piece is prolonged, and the working performance of the conductive connecting piece is ensured to a certain extent.

[0058] In some embodiments, the fourth cooling flow channel comprises a fourth branch flow channel and a fifth branch flow channel communicated with each other, the fourth branch flow channel is arranged in the first end cover and communicated with the main flow channel, and the fifth branch flow channel is arranged in the second end cover, the second end cover is provided with the cooling cavity, and the sixth outlet flow channel is arranged on the inner wall of the second end cover.

[0059] In the above technical solution, the difficulty of cooperation and communication between the main flow channel and the cooling cavity is reduced, the cooling liquid in the main flow channel can be conveniently output into the cooling cavity, and the conductive connecting piece is cooled.

[0060] In some embodiments, the driving device further comprises a speed reducer arranged outside the motor, the housing is provided with a seventh outlet flow channel communicated with the first cooling flow channel, and the seventh outlet flow channel is communicated with the inside of the speed reducer to convey the cooling liquid to the moving part of the speed reducer.

[0061] In the above technical solution, the moving part of the speed reducer is cooled, and the service life of the speed reducer is prolonged.

[0062] In a second aspect, the embodiments of the present application provide a vehicle comprising the driving device.

[0063] In the above technical solution, by using the driving device, the heat dissipation effect of the driving device of the vehicle can be improved to a certain extent, the heat dissipation cost of the driving device is reduced, and the working performance of the vehicle is ensured to a certain extent.

[0064] Additional aspects and advantages of the application will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0065] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0066] Figure 1 Schematic view of a vehicle according to some embodiments of the present application.

[0067] Figure 2 Exploded view of a battery according to some embodiments of the present application.

[0068] Figure 3 Schematic view of a drive device according to some embodiments of the present application.

[0069] Figure 4 Schematic view of a drive device according to some embodiments of the present application. Figure 3 Side view of a drive device.

[0070] Figure 5 Schematic view of a drive device according to some embodiments of the present application. Figure 4 Cross-sectional view along the line A-A.

[0071] Figure 6 Schematic view of a drive device according to some embodiments of the present application. Figure 5 Magnified view of region I.

[0072] Figure 7 Schematic view of a drive device according to some embodiments of the present application. Figure 4 Cross-sectional view along the line B-B.

[0073] Figure 8 Schematic view of a drive device according to some embodiments of the present application. Figure 7 Magnified view of region II.

[0074] Figure 9 Schematic view of a drive device according to some embodiments of the present application. Figure 4 Cross-sectional view along the line C-C.

[0075] Figure 10 Schematic view of a drive device according to some embodiments of the present application. Figure 9 Magnified view of region III.

[0076] Figure 11 Schematic view of a housing according to some other embodiments of the present application.

[0077] Figure 12 Side view of a housing according to some other embodiments of the present application.

[0078] Figure 13 Schematic view of a drive device according to some other embodiments of the present application. Figure 12 Cross-sectional view along the line D-D.

[0079] Figure 14 Schematic view of a drive device according to some other embodiments of the present application.

[0080] Figure 15 Fig. 1 is a schematic view of a flow channel assembly according to some embodiments of the present application. Figure 14 Fig. 2 is a side view of a drive device according to some embodiments of the present application.

[0081] Figure 16 Fig. 3 is a sectional view along the line E-E. Figure 15

[0082] Figure 17 Fig. 4 is an enlarged view of the region IV in Fig. 3. Figure 16

[0083] Fig. 5 is a top view of a flow channel assembly according to some embodiments of the present application. Figure 18

[0084] Fig. 6 is a sectional view along the line F-F. Figure 19 Figure 18 Fig. 7 is a schematic view of a flow channel assembly according to some embodiments of the present application.

[0085] Figure 20 Fig. 8 is another angle of a schematic view of a flow channel assembly according to some embodiments of the present application.

[0086] Figure 21 Fig. 9 is a side view of a flow channel assembly according to some embodiments of the present application.

[0087] Figure 22 Fig. 10 is a sectional view along the line G-G.

[0088] Figure 23 Figure 22 Fig. 11 is a sectional view along the line H-H.

[0089] Reference signs:

[0090] ​​​1000, driving device; 100, motor; 110, housing; 111, accommodating cavity; 112, first cooling flow channel; 1121, main flow channel; 1122, first branch flow channel; 113, first outlet flow channel; 1131, first communication section; 1132, first outlet; 114, side wall; 1141, main body part; 1142, sealing cover; 115, second outlet flow channel; 1151, second communication section; 1152, second outlet; 116, end wall; 1161, fourth outlet flow channel; 117, first throttling hole; 118, seventh outlet flow channel; 120, stator assembly; 121, stator winding; 122, stator core; 130, flow channel assembly; 131, second cooling flow channel; 132, third outlet flow channel; 1321, third outlet; 133, sealing structure; 134, magnetic ring mounting cavity; 135, shell part; 140, magnetic ring; 150, end cover; 151, third cooling flow channel; 1511, second branch flow channel; 1512, third branch flow channel; 152, first end cover; 153, second end cover; 1531, recess; 1532, fifth outlet flow channel; 154, second throttling hole; 155, cooling cavity; 156, fourth cooling flow channel; 1561, sixth outlet flow channel; 1562, fourth branch flow channel; 1563, fifth branch flow channel; 160, electrically conductive connecting piece; 170, plug; 180, fastener; 2000, battery; 2100, box body; 2101, first part; 2102, second part; 2200, battery cell; 3000, vehicle. DETAILED DESCRIPTION

[0091] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, any other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0092] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, but not to describe a particular order or primary and secondary relationship.

[0093] Reference to an “example” in this application means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same example, nor are separate or alternative examples mutually exclusive of other examples. One of ordinary skill in the art will readily recognize from the disclosure herein, that an example described herein can be incorporated into one or more other examples, everywhere that it is found.

[0094] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mount”, “connect”, “connection”, “attach” should be understood broadly, for example, can be fixedly connected, or detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0095] The term “and / or” in this application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character “ / ” in this application generally represents that the front and rear associated objects have an “or” relationship.

[0096] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0097] “Multiple” appearing in this application means two or more, including two.

[0098] It should be noted that when the driving device is applied to a vehicle, the main function of the driving device is to effectively transmit power to the wheels of the vehicle, thereby generating driving force to enable the vehicle to travel normally.

[0099] Among them, with the continuous expansion of the new energy vehicle market and the continuous progress of technology, more and more electric driving devices are applied to electric vehicles and hybrid vehicles. In order to reduce the setting of connecting pieces and redundant components and improve the integrity and efficiency of the electric driving device, the coaxial arrangement of the motor, reducer and differential of the electric driving device is usually adopted to form a coaxial electric driving device.

[0100] However, in the coaxial electric drive device, due to the compact layout of the motor, the reducer and the differential and other components, the heat dissipation problem of the motor is more prominent. If the motor heat cannot be effectively dissipated, it will accumulate in the motor. With the accumulation of heat, the power output capability of the motor will gradually decrease, affecting the overall performance of the electric drive device.

[0101] In the prior art, in order to dissipate heat from the motor, a complex oil guide is usually attached to the outer periphery of the motor. The oil guide guides the cooling oil into the motor to achieve the purpose of dissipating heat from the battery.

[0102] However, the applicant finds that the existing oil guide not only increases the cost of the drive device, but also makes the structure of the drive device complex and occupies a large space, which is not conducive to the assembly of the drive device.

[0103] In order to solve the above problems, combined with Figures 3-23 The embodiment of the present application provides a drive device 1000. The drive device 1000 directly forms a first cooling flow channel 112 in the wall of the shell 110 of the motor 100, so that the wall of the shell 110 of the motor 100 can be filled with cooling liquid. The first cooling flow channel 112 is arranged to communicate with the accommodating cavity 111 through the first outlet flow channel 113, and the first outlet flow channel 113 is arranged to correspond to at least the stator winding 121. When the first cooling flow channel 112 is filled with cooling liquid, the cooling liquid can be delivered to the stator winding 121 through the first outlet flow channel 113 to achieve the purpose of cooling the stator winding 121 and improve the cooling effect. At the same time, by forming the first cooling flow channel 112 in the wall of the shell 110, the integration of the cooling flow channel and the shell 110 is realized, which facilitates the cancellation of the setting of various complex oil guides, thereby simplifying the structure of the drive device 1000, reducing the volume of the drive device 1000, and reducing the manufacturing cost of the drive device 1000. The drive device 1000 of the present application has the advantages of high cooling effect, low manufacturing cost and compact structure.

[0104] As shown in Figure 1 The embodiment of the present application also provides a vehicle 3000 using the above-mentioned drive device 1000. The drive device 1000 is arranged in the vehicle 3000 as a power system of the vehicle 3000, mainly used for converting electrical energy into mechanical energy and outputting the mechanical energy to the wheels of the vehicle 3000 to drive the vehicle 3000 to run.

[0105] Among them, the vehicle 3000 mentioned here can be a fuel automobile, a gas automobile or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile.

[0106] In some embodiments, combined with Figure 1 and Figure 2As shown, the vehicle 3000 is equipped with a battery 2000, which is used to provide power to the drive unit 1000. The battery 2000 can be located at the bottom, front or rear of the vehicle 3000.

[0107] In some embodiments, such as Figure 2 As shown, the battery 2000 includes a battery cell 2200 and a housing 2100, with the battery cell 2200 housed within the housing 2100. This allows the housing 2100 to support and protect the battery cell 2200, improving its structural stability, extending its lifespan, and enhancing its safety during use.

[0108] The housing 2100 can adopt various structures.

[0109] In some embodiments, such as Figure 2 As shown, the housing 2100 may include a first part 2101 and a second part 2102, the first part 2101 and the second part 2102 cover each other, and the first part 2101 and the second part 2102 together define an installation cavity for accommodating the battery cell 2200, so as to reduce the molding difficulty of the housing 2100 and facilitate the placement of the battery cell 2200 inside the housing 2100.

[0110] In this design, the first part 2101 can be a hollow structure open at one end, and the second part 2102 can be a plate-like structure. The second part 2102 covers the open side of the first part 2101 (not shown in the example figure), so that the first part 2101 and the second part 2102 together define the mounting cavity; or, the second part 2102 can be a hollow structure open at one end, and the first part 2101 can be a plate-like structure (not shown in the example figure). The first part 2101 covers the open side of the second part 2102, so that the first part 2101 and the second part 2102 can also cooperate to define the mounting cavity; or, as... Figure 2 As shown, both the first part 2101 and the second part 2102 are hollow structures with one side open. The open side of the first part 2101 covers the open side of the second part 2102 to define the mounting cavity.

[0111] It should be noted that the box 2100 formed by the first part 2101 and the second part 2102 can be of various shapes, such as cylinder, cube or cuboid; the battery cell 2200 can be of various shapes, such as cylinder or square.

[0112] In some embodiments, the box 2100 can be part of the chassis structure of the vehicle 3000. For example, part of the box 2100 can be part of the floor of the vehicle 3000, or part of the box 2100 can be part of the cross beam and longitudinal beam of the vehicle 3000.

[0113] Of course, in other embodiments, the battery 2000 can also not be provided with the box 2100, but only include the battery cells 2200, and the plurality of battery cells 2200 are electrically connected and assembled into the vehicle 3000 after being formed into a whole by the fixing structure.

[0114] In a specific example, the drive device 1000 is installed in the engine compartment of the vehicle 3000.

[0115] In which, when the vehicle 3000 is a front-wheel drive car, the drive device 1000 is installed in the front engine compartment of the vehicle 3000 and is used to output the mechanical energy to the front wheels of the vehicle 3000 to drive the vehicle 3000 to run; when the vehicle 3000 is a rear-wheel drive car, the drive device 1000 is installed in the rear engine compartment of the vehicle 3000 and is used to output the mechanical energy to the rear wheels of the vehicle 3000 to drive the vehicle 3000 to run; when the vehicle 3000 is a four-wheel drive car, the drive device 1000 has two, one electric drive device 1000 is installed in the front engine compartment of the vehicle 3000 and is used to output the mechanical energy to the front wheels of the vehicle 3000, and the other drive device 1000 is installed in the rear engine compartment of the vehicle 3000 and is used to output the mechanical energy to the rear wheels of the vehicle 3000 to drive the vehicle 3000 to run.

[0116] The drive device 1000 according to the embodiments of the present application is described below with reference to the drawings of the specification.

[0117] As shown in Figure 3 , the drive device 100 includes a motor 1000.

[0118] In which, in combination with Figure 3 , Figure 4 and Figure 5As shown, the motor 100 comprises a shell 110 and a stator assembly 120, the shell 110 is internally hollow to form an accommodating cavity 111, the stator assembly 120 comprises a stator winding 121, the stator winding 121 is arranged in the accommodating cavity 111, the wall of the shell 110 is internally formed with a first cooling flow channel 112, the first cooling flow channel 112 is adapted to be filled with a cooling liquid, the first cooling flow channel 112 is communicated with the accommodating cavity 111 through a first outlet flow channel 113, the first outlet flow channel 113 is arranged at least corresponding to the stator winding 121 to transport the cooling liquid towards the stator winding 121. Thus, the stator winding 121 can be cooled by the cooling liquid, the temperature of the stator winding 121 is reduced, which is beneficial to reduce the temperature of the motor 100, prolong the service life of the motor 100, and ensure the working performance of the motor 100 to a certain extent.

[0119] Notably, the first cooling flow channel 112 is directly formed in the wall of the shell 110, so that the wall of the shell 110 of the motor 100 can be filled with the cooling liquid, and the first cooling flow channel 112 is arranged to be communicated with the accommodating cavity 111 through the first outlet flow channel 113, which can realize the integration of the cooling flow channel and the shell 110 while achieving the cooling of the motor 100 by the cooling liquid, and facilitate the cancellation of the setting of various complex oil guiding components, thereby simplifying the structure of the driving device 1000, reducing the volume of the driving device 1000, and reducing the manufacturing cost of the driving device 1000.

[0120] Meanwhile, since the first cooling flow channel 112 is directly integrated in the shell 110, when the cooling liquid is guided to flow by the first cooling flow channel 112, the shell 110 can also be cooled by the first cooling flow channel 112, thereby improving the cooling effect of the cooling liquid on the motor 100, so that the driving device 1000 of the present application has the advantages of good cooling effect, low manufacturing cost and compact structure.

[0121] In addition, since the first cooling flow channel 112 is directly integrated in the shell 110, the first outlet flow channel 113 can be directly machined on the shell 110, and the outlet position, outlet angle and outlet diameter of the first outlet flow channel 113 can be flexibly adjusted, so that the setting position of the first outlet flow channel 113 is more flexible, and the position of the cooling liquid transported towards the stator winding 121 is more flexible.

[0122] It can be understood that, compared with the prior art, the cooling flow channel is directly integrated in the shell 110 of the motor 100, the setting of various complex oil guiding members is cancelled, and the driving device 1000 has the advantages of low manufacturing cost, compact structure, excellent heat dissipation effect, and flexible adjustment of the fixed cooling position.

[0123] It can be understood that, compared with the prior art, the cooling flow channel is directly integrated in the shell 110 of the motor 100, the setting of various complex oil guiding members is cancelled, and the driving device 1000 has the advantages of low manufacturing cost, compact structure, excellent heat dissipation effect, and flexible adjustment of the fixed cooling position.

[0124] In the application, the cooling liquid can be cooling water, cooling oil, etc.

[0125] In specific examples, the motor 100 is mainly used to convert the electric energy provided by the battery 2000 into mechanical energy.

[0126] In some embodiments, the first cooling flow channel 112 is communicated with the containing cavity 111 through a plurality of first outlet flow channels 113, and the plurality of first outlet flow channels 113 can increase the communication area of the first cooling flow channel 112 and the containing cavity 111, so that the cooling liquid in the first cooling flow channel 112 can flow into the containing cavity 111 effectively, and the flow of the cooling liquid into the containing cavity 111 is ensured to a certain extent, so as to cool the stator winding 121 by using the cooling liquid and improve the cooling effect.

[0127] In some embodiments, in combination with Figure 3 , Figure 4 and Figure 5 , the shell 110 has a side wall 114 extending along the axial direction of the motor 100, and at least part of the first cooling flow channel 112 is arranged in the side wall 114. The first cooling flow channel 112 is formed in the wall of the shell 110, and the integration of the first cooling flow channel 112 and the shell 110 is realized, so that the setting of various complex oil guiding members can be cancelled.

[0128] In some embodiments, the plurality of first outlet flow channels 113 are arranged at intervals along the axial direction of the motor 100, so as to ensure that the first cooling flow channel 112 can be communicated with the containing cavity 111 through the plurality of first outlet flow channels 113, and the communication difficulty of the first cooling flow channel 112 and the plurality of first outlet flow channels 113 is reduced.

[0129] In some embodiments, in combination with Figure 5 and Figure 6 As shown in the drawings, the first outlet flow channel 113 includes a first communication section 1131 and a first outlet 1132 formed on the inner circumferential wall of the side wall 114, and the flow area of the first outlet 1132 is smaller than that of the first communication section 1131. By reducing the difficulty of forming the first outlet flow channel 113, the cooling liquid in the first cooling flow channel 112 can be sprayed when flowing into the accommodating cavity 111 through the first outlet 1132, so that the cooling liquid in the first cooling flow channel 112 can be sprayed to the stator winding 121, achieving the purpose of cooling the stator winding 121 by the cooling liquid, and improving the cooling effect.

[0130] It should be noted that, in order to ensure that the first cooling flow channel 112 and the accommodating cavity 111 are connected through the first outlet flow channel 113, the first outlet flow channel 113 is usually formed on the inner circumferential wall of the side wall 114 and penetrates the inner circumferential wall of the side wall 114. In order to form the first outlet flow channel 113 on the inner circumferential wall of the side wall 114, a hole is usually punched on the inner circumferential wall of the side wall 114 through the inside of the side wall 114, but if the vertical machining space of the inside of the side wall 114 is insufficient at individual positions, a hole can be punched on the inner circumferential wall of the side wall 114 through the outside of the side wall 114, and a corresponding hole is also formed on the outer circumferential wall of the side wall 114. In order to prevent the cooling liquid in the first cooling flow channel 112 from being discharged through the outer circumferential wall of the side wall 114, as shown in the drawings, a plug 170 can be added to the outer circumferential wall of the side wall 114. Figure 6

[0131] In some embodiments, in combination with Figure 4 , Figure 5 and Figure 6 As shown in the drawings, at least part of the first cooling flow channel 112 is formed in the inside of the side wall 114. That is, at least part of the first cooling flow channel 112 is formed in the inside of the side wall 114 of the housing 110, so that the first cooling flow channel 112 is formed in the wall of the housing 110, reducing the difficulty of forming the first cooling flow channel 112, and avoiding the need to set various complex oil guides on the outer periphery of the motor 100, thereby simplifying the structure of the driving device 1000, reducing the volume of the driving device 1000, and reducing the manufacturing cost of the driving device 1000. The driving device 1000 has the advantages of high cooling effect, low manufacturing cost, compact structure, etc.

[0132] In other embodiments, in combination with Figure 11 , Figure 12 and Figure 13 ​As shown, the side wall 114 includes a main body part 1141 and a sealing cover 1142, the outer side wall of the main body part 1141 is provided with a groove, and the sealing cover 1142 is arranged on the outer side wall of the main body part 1141 and seals the groove. The sealing cover 1142 cooperates with the groove to form at least part of the first cooling flow channel 112, and the first outlet flow channel 113 is arranged on the main body part 1141. It can be understood here that the inside of the side wall 114 is not limited to being hollow to form at least part of the first cooling flow channel 112. The side wall 114 can also be arranged to include the main body part 1141 and the sealing cover 1142. By cooperating the main body part 1141 and the sealing cover 1142, the first cooling flow channel 112 can be formed inside the wall of the housing 110. In this way, the motor 100 can be cooled by the cooling liquid, and various complex oil guiding members can be avoided around the motor 100, the structure of the driving device 1000 is simplified, and the volume of the driving device 1000 is reduced.

[0133] At the same time, by arranging the first outlet flow channel 113 on the main body part 1141, the first cooling flow channel 112 can be connected to the containing cavity 111 through the first outlet flow channel 113, and the connection difficulty of the first cooling flow channel 112 and the containing cavity 111 is reduced.

[0134] In addition, by cooperating the main body part 1141 and the sealing cover 1142 to form the first cooling flow channel 112 inside the wall of the housing 110, the forming difficulty of the first outlet flow channel 113 is also reduced.

[0135] In a specific example, the first outlet flow channel 113 is arranged on the main body part 1141 opposite the position of the groove. After the first outlet flow channel 113 is processed, the sealing cover 1142 is arranged on the outer side wall of the main body part 1141 and seals the groove, so as to form at least part of the first cooling flow channel 112 between the main body part 1141 and the sealing cover 1142.

[0136] The sealing cover 1142 can be fixedly connected to the outer side wall of the main body part 1141 by means of friction stir welding, bolts, sealing glue cooperation and the like.

[0137] In some embodiments, a sealing gasket is arranged between the sealing cover 1142 and the main body part 1141 to realize the sealing cooperation of the sealing cover 1142 and the main body part 1141, so as to ensure the sealing of the first cooling flow channel 112 and ensure that the cooling liquid in the first cooling flow channel 112 can be smoothly discharged through the first outlet flow channel 113.

[0138] In some embodiments, in combination with Figure 3 , Figure 4 and Figure 5As shown, the stator assembly 120 further comprises a stator core 122, the stator core 122 is arranged in the accommodating cavity 111, the stator winding 121 is arranged in the stator core 122, the shell 110 is further provided with a second outlet flow channel 115, the second outlet flow channel 115 is respectively communicated with the first cooling flow channel 112 and the accommodating cavity 111, and the second outlet flow channel 115 is opposite to the stator core 122. In this way, the cooling liquid in the first cooling flow channel 112 can flow to the stator core 122 through the second outlet flow channel 115, so as to cool the stator core 122 by using the cooling liquid, reduce the temperature of the stator core 122, reduce the temperature of the motor 100, prolong the service life of the motor 100, and ensure the working performance of the motor 100 to a certain extent.

[0139] In summary, the stator core 122 and the stator winding 121 are cooled respectively in the application, so as to improve the cooling effect of the cooling liquid on the motor 100 and prolong the service life of the motor 100.

[0140] In some embodiments, in combination with Figure 4 , Figure 5 and Figure 6 As shown, the shell 110 is provided with a plurality of second outlet flow channels 115, and the plurality of second outlet flow channels 115 can increase the communication area of the first cooling flow channel 112 and the accommodating cavity 111, so that the cooling liquid in the first cooling flow channel 112 can effectively flow into the accommodating cavity 111, and the flow of the cooling liquid entering the accommodating cavity 111 is ensured to a certain extent, so as to cool the stator core 122 by using the cooling liquid and improve the cooling effect.

[0141] In some embodiments, in combination with Figure 4 , Figure 5 and Figure 6 As shown, the plurality of second outlet flow channels 115 are arranged in the axial direction of the motor 100, so as to ensure that the first cooling flow channel 112 can communicate with the accommodating cavity 111 through the plurality of second outlet flow channels 115, and reduce the communication difficulty of the first cooling flow channel 112 and the plurality of second outlet flow channels 115.

[0142] In some embodiments, as shown in Figure 5 The second outlet flow channel 115 comprises a second communication section 1151 and a second outlet 1152 located on the inner circumferential wall of the side wall 114, and the flow area of the second outlet 1152 is greater than that of the second communication section 1151. Since the stator core 122 is usually abutted on the inner circumferential wall of the side wall 114, by arranging the second outlet 1152 with a larger flow area, the stator core 122 can be prevented from blocking the second outlet 1152, so as to cool the stator core 122 by using the cooling liquid.

[0143] Meanwhile, by setting the flow area of the second outlet 1152 to be larger than the flow area of the second communication section 1151, it is also convenient to store part of the cooling liquid by the second outlet 1152, so as to cool the stator core 122 by the cooling liquid, and improve the cooling effect on the stator core 122.

[0144] In some embodiments, as shown in Figure 5 the axial direction of the motor 100, part of the stator winding 121 extends out of the stator core 122, and the first outlet flow channel 113 and the second outlet flow channel 115 are arranged in the axial direction of the motor 100, so that the first outlet flow channel 113 is opposite to the stator winding 121 extending out of the stator core 122. Therefore, the cooling liquid discharged through the first outlet flow channel 113 can be effectively output to the stator winding 121, achieving the purpose of cooling the stator core 122 and the stator winding 121 at the same time, and facilitating to improve the working performance of the motor 100.

[0145] In some embodiments, in combination with Figure 14 , Figure 15 and Figure 16 as shown, the driving device 1000 further comprises a flow channel assembly 130, at least part of the flow channel assembly 130 is arranged on the radially inner side of the stator winding 121, the flow channel assembly 130 is provided with a second cooling flow channel 131 and a third outlet flow channel 132 (the specific structure of the third outlet flow channel 132 can be referred to Figure 19 ), the second cooling flow channel 131 is communicated with the first cooling flow channel 112, the third outlet flow channel 132 is communicated with the second cooling flow channel 131, and the third outlet 1321 of the third outlet flow channel 132 is opposite to the radially inner side of the stator winding 121. That is to say, the first cooling flow channel 112, the second cooling flow channel 131 and the third outlet flow channel 132 are communicated in sequence, and the third outlet 1321 of the third outlet flow channel 132 is opposite to the radially inner side of the stator winding 121, so as to realize the output of the cooling liquid to the radially inner side of the stator winding 121, further cool the stator winding 121 by the cooling liquid, reduce the temperature of the stator winding 121, facilitate to reduce the temperature of the motor 100, prolong the service life of the motor 100, and ensure the working performance of the motor 100 to a certain extent.

[0146] In summary, on the one hand, the first outlet flow channel 113 is used to transport the cooling liquid to the stator winding 121, and on the other hand, the third outlet flow channel 132 is used to transport the cooling liquid to the stator winding 121, so as to improve the cooling effect on the stator winding 121, prolong the service life of the stator winding 121, and further prolong the service life of the motor 100.

[0147] In a specific example, the first outlet flow channel 113 is configured to deliver the cooling liquid towards the radially outer side of the stator winding 121, and the third outlet flow channel 132 is configured to deliver the cooling liquid towards the radially inner side of the stator winding 121, and the first outlet flow channel 113 and the third outlet flow channel 132 are cooperated to simultaneously cool the radially inner side and the radially outer side of the stator winding 121, thereby maximizing the cooling effect on the stator winding 121.

[0148] In some embodiments, as shown in Figure 20 , Figure 22 and Figure 23 , the flow channel assembly 130 comprises a housing portion 135 and a sealing structure 133 arranged on the housing portion 135, and the sealing structure 133 and the housing portion 135 cooperated to form the second cooling flow channel 131, thereby reducing the difficulty of forming the second cooling flow channel 131.

[0149] In some embodiments, as shown in Figure 16 , Figure 18 and Figure 19 , the flow channel assembly 130 extends along the circumferential direction of the stator winding 121, the second cooling flow channel 131 is arranged close to the top of the flow channel assembly 130, and the third outlet flow channel 132 is arranged on the top wall of the flow channel assembly 130. Since the cooling liquid sprayed to the stator winding 121 under the action of gravity will flow to the bottom of the stator winding 121, based on this, the second cooling flow channel 131 is arranged close to the top of the flow channel assembly 130, and the third outlet flow channel 132 is arranged on the top wall of the flow channel assembly 130, so as to deliver the cooling liquid towards the top of the stator winding 121, and at the same time, the bottom of the stator winding 121 can be in a state of being soaked in oil, thereby achieving the cooling of the stator winding 121, and at the same time, the second cooling flow channel 131 and the third outlet flow channel 132 can be avoided to be arranged at the bottom of the flow channel assembly 130, thereby simplifying the structure of the flow channel assembly 130 and reducing the manufacturing difficulty of the flow channel assembly 130.

[0150] Therefore, it can also be understood that, by arranging the second cooling flow channel 131 close to the top of the flow channel assembly 130 and arranging the third outlet flow channel 132 on the top wall of the flow channel assembly 130, the structure of the flow channel assembly 130 is simplified, and at the same time, the cooling effect of the flow channel assembly 130 on the stator winding 121 is ensured.

[0151] In some embodiments, as shown in Figure 18 and Figure 19 , the third outlet flow channel 132 comprises a plurality of third outlet flow channels 132, and the plurality of third outlet flow channels 132 are arranged in the circumferential direction of the flow channel assembly 130. In order to form a plurality of third outlets 1321 on the top wall of the flow channel assembly 130 (as shown in Figure 20 and Figure 21As shown in the figure, this increases the communication area between the second cooling channel 131 and the radial inner side of the stator winding 121, so that the coolant in the second cooling channel 131 can effectively flow to the radial inner side of the stator winding 121, and to a certain extent ensure the flow rate of the coolant flowing to the radial inner side of the stator winding 121, thereby improving the cooling effect on the stator winding 121.

[0152] In some embodiments, the maximum distance between any two points of the third outlet 1321 is 0.5mm-3mm. When the maximum distance between any two points of the third outlet 1321 is small, the flow rate of coolant flowing towards the radially inner side of the stator winding 121 is reduced; when the maximum distance between any two points of the third outlet 1321 is large, the flow velocity of coolant flowing towards the radially inner side of the stator winding 121 is reduced.

[0153] Based on this, this application sets the maximum distance between any two points of the third outlet 1321 to 0.5mm-3mm to ensure that the coolant in the third outlet channel 132 can flow to the radial inner side of the stator winding 121 in a large quantity and quickly, so as to cool the stator winding 121 and improve the cooling effect.

[0154] In a specific example, the maximum distance between any two points of the third exit 1321 is 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, or 3mm, etc.

[0155] When the third outlet 1321 is a circular hole, the maximum distance between any two points of the third outlet 1321 mentioned above can be understood as the diameter of the third outlet 1321.

[0156] In some embodiments, combined with Figure 14 , Figure 15 and Figure 16 As shown, the stator assembly 120 also includes a stator core 122. A portion of the stator winding 121 extends out of the stator core 122 along the axial direction of the motor 100. The flow channel assembly 130 is integrally located radially inside the stator winding 121 extending from the stator core 122. This facilitates the flow channel assembly 130 in delivering coolant towards the radially inside of the stator winding 121, achieving the purpose of cooling the radially inside of the stator winding 121 and reducing the difficulty of cooling the stator winding 121 by the flow channel assembly 130.

[0157] In some embodiments, combined with Figure 5 and Figure 16As shown, the housing 110 includes a side wall 114 extending along the axial direction of the motor 100 and an end wall 116 arranged at one axial end of the side wall 114, the flow channel assembly 130 is arranged in the accommodating cavity 111 and adjacent to the end wall 116, the first cooling flow channel 112 includes a main flow channel 1121 and a first branch flow channel 1122 which are in communication with each other, the main flow channel 1121 is arranged in the side wall 114, and the first branch flow channel 1122 is arranged in the end wall 116, the first outlet flow channel 113 is arranged in the side wall 114 and communicates with the main flow channel 1121, and the second cooling flow channel 131 communicates with the first branch flow channel 1122. Among them, by arranging the first outlet flow channel 113 in the side wall 114 and communicating with the main flow channel 1121, the first outlet flow channel 113 is in cooperative communication with the first cooling flow channel 112, which facilitates the use of the first outlet flow channel 113 to transport part of the cooling liquid in the first cooling flow channel 112 to the accommodating cavity 111, and reduces the cooling difficulty of the stator winding 121.

[0158] At the same time, by connecting the second cooling flow channel 131 with the first branch flow channel 1122, the second cooling flow channel 131 is in cooperative communication with the first cooling flow channel 112, which facilitates the transportation of part of the cooling liquid in the first cooling flow channel 112 to the second cooling flow channel 131, thereby facilitating the use of the second cooling flow channel 131 to output cooling liquid towards the radial inner side of the stator winding 121, and further cooling the stator winding 121 with the cooling liquid.

[0159] In some embodiments, in combination with Figure 16 and Figure 17 As shown, the second cooling flow channel 131 communicates with the first branch flow channel 1122 through the first throttling hole 117. While realizing the cooperative communication between the second cooling flow channel 131 and the first branch flow channel 1122, it is also convenient to control the amount of cooling liquid flowing to the second cooling flow channel 131 through the first throttling hole 117, thereby facilitating the control of the flow of cooling liquid for cooling the stator winding 121, facilitating the improvement of the cooling effect of the stator winding 121, and facilitating the guarantee of the cooling effect of the stator winding 121.

[0160] In a specific example, the amount of cooling liquid flowing to the second cooling flow channel 131 is controlled by controlling the aperture of the first throttling hole 117.

[0161] Among them, the aperture of the first throttling hole 117 is determined during the machining process of the motor 100.

[0162] In some embodiments, the motor 100 further comprises a rotor assembly and a first support bearing (not shown in the figure), the rotor assembly is arranged at the radially inner side of the stator assembly 120, and the rotor assembly is coupled with the stator assembly 120, and the first support bearing is used to support a rotor shaft of the rotor assembly. It can be understood here that the rotor assembly has a rotor shaft, and the first support bearing supports the rotor shaft, so as to improve the position stability of the rotor shaft, make the rotation of the rotor shaft more smooth, and ensure the working performance of the rotor shaft to a certain extent.

[0163] At the same time, by arranging the rotor assembly at the radially inner side of the stator assembly 120 and coupling the rotor assembly with the stator assembly 120, the stator assembly 120 drives the rotor assembly to move, so as to convert the electric energy provided by the battery 2000 into mechanical energy by using the motor 100, and the working performance of the driving device 1000 is ensured to a certain extent.

[0164] Among them, the motor 100 of the present application can be an axial flux motor, a radial flux motor, a servo motor, a brush motor or a brushless motor, etc., which is not limited here.

[0165] In some embodiments, in combination with Figure 15 , Figure 16 and Figure 17 It is shown that the end wall 116 is formed with a fourth outlet flow channel 1161 communicating with the first branch flow channel 1122, and the fourth outlet flow channel 1161 is used to transport the cooling liquid towards the first support bearing. Thus, the first support bearing can be cooled and lubricated by the cooling liquid, the service life of the first support bearing is prolonged, the friction between the first support bearing and the rotor shaft is reduced, the rotation of the rotor shaft is more smooth, and the working performance of the rotor shaft is ensured to a certain extent.

[0166] In some embodiments, as shown in Figure 17 , the fourth outlet flow channel 1161 extends in the axial direction of the motor 100. To ensure that the cooling liquid discharged through the fourth outlet flow channel 1161 can be accurately transmitted to the first support bearing, and improve the cooling effect of the first support bearing.

[0167] In some embodiments, as shown in Figure 17 , the fourth outlet flow channel 1161 comprises a plurality of fourth outlet flow channels 1161, and the plurality of fourth outlet flow channels 1161 are arranged opposite in the axial direction of the motor 100. The plurality of fourth outlet flow channels 1161 are used to further improve the cooling effect of the cooling liquid on the first support bearing.

[0168] In some embodiments, as shown in Figure 16 , the motor 100 further comprises a magnetic ring 140, and the magnetic ring 140 is arranged close to the first support bearing. To suppress the generation of shaft current by using the magnetic ring 140, so as to avoid the failure of the first support bearing, and prolong the service life of the first support bearing.

[0169] In some embodiments, as shown in Figure 16 the flow channel assembly 130 is arranged close to the first support bearing, and the magnetic ring 140 is fixed to the flow channel assembly 130. This improves the positional stability of the magnetic ring 140 and reduces the difficulty of fixing the magnetic ring 140, and to some extent guarantees the working performance of the magnetic ring 140.

[0170] In summary, the flow channel assembly 130 of the present application not only can transport cooling liquid towards the radial inner side of the stator winding 121, but also can fix the magnetic ring 140, so that one flow channel assembly 130 has two functions at the same time. This can avoid arranging a separate structure to fix the magnetic ring 140, simplify the structure of the motor 100, and reduce the assembly difficulty and manufacturing cost of the motor 100.

[0171] In some embodiments, as shown in Figure 22 and Figure 23 the flow channel assembly 130 is arranged close to the first support bearing, and the magnetic ring 140 is fixed to the flow channel assembly 130. This improves the positional stability of the magnetic ring 140 and reduces the difficulty of fixing the magnetic ring 140, and to some extent guarantees the working performance of the magnetic ring 140.

[0172] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 7 the motor 100 further comprises an end cover 150 arranged at the other axial side of the side wall 114, and the inner part of the peripheral wall of the end cover 150 is provided with a third cooling flow channel 151, and the third cooling flow channel 151 is respectively communicated with the main flow channel 1121 and the internal flow channel of the mover shaft. Here, it can be understood that the end cover 150 and the end wall 116 are respectively arranged at the axially opposite sides of the side wall 114, so as to form a sealed accommodating cavity 111.

[0173] At the same time, by arranging the third cooling flow channel 151 in the inner part of the peripheral wall of the end cover 150, and arranging the third cooling flow channel 151 to be respectively communicated with the main flow channel 1121 and the internal flow channel of the mover shaft, the cooling liquid in the main flow channel 1121 can be output to the internal flow channel of the mover shaft by using the third cooling flow channel 151, so as to achieve the purpose of cooling the mover shaft by using the cooling liquid, reduce the temperature of the mover shaft, and be beneficial to reduce the temperature of the motor 100 and prolong the service life of the motor 100.

[0174] In addition, by directly arranging the third cooling flow channel 151 in the inner part of the peripheral wall of the end cover 150, the integration of the third cooling flow channel 151 and the end cover 150 can be realized, and the arrangement of various complex oil guides can be cancelled, and the structure of the driving device 1000 is simplified.

[0175] In some embodiments, as shown in Figure 7 and Figure 8As shown, the third cooling flow channel 151 is formed in the inner part of the peripheral wall of the end cover 150, so that the third cooling flow channel 151 is arranged in the inner part of the peripheral wall of the end cover 150, and the forming difficulty of the third cooling flow channel 151 is reduced.

[0176] In some embodiments, in combination with Figure 7 and Figure 8 As shown, the end cover 150 includes a first end cover 152 and a second end cover 153, the first end cover 152 is connected with the side wall 114 in a matching manner, the second end cover 153 is arranged at the radial inner side of the first end cover 152, the third cooling flow channel 151 includes a second branch flow channel 1511 and a third branch flow channel 1512 which are communicated with each other, the second branch flow channel 1511 is arranged in the first end cover 152 and communicated with the main flow channel 1121, the third branch flow channel 1512 is arranged in the second end cover 153 and communicated with the inner flow channel. Among them, since the second end cover 153 is arranged at the radial inner side of the first end cover 152, by connecting the first end cover 152 with the side wall 114 in a matching manner, the connection of the end cover 150 with the side wall 114 is realized, and the connection difficulty of the end cover 150 with the side wall 114 is reduced.

[0177] At the same time, by arranging the third cooling flow channel 151 to include the second branch flow channel 1511 and the third branch flow channel 1512 which are communicated with each other, and arranging the second branch flow channel 1511 in the first end cover 152 and communicated with the main flow channel 1121, and arranging the third branch flow channel 1512 in the second end cover 153 and communicated with the inner flow channel, the communication of the main flow channel 1121 and the inner flow channel of the mover shaft can be realized by the cooperation of the second branch flow channel 1511 and the third branch flow channel 1512, the communication difficulty of the main flow channel 1121 and the inner flow channel of the mover shaft is reduced, so that the cooling liquid in the main flow channel 1121 can be conveniently transported into the mover shaft, so as to achieve the purpose of cooling the mover shaft by the cooling liquid.

[0178] It should be noted that the matching connection of the end cover 150 with the side wall 114 can be welding, bonding or bolt connection, etc.

[0179] In some embodiments, in combination with Figure 7 and Figure 8 As shown, the second branch flow channel 1511 is communicated with the main flow channel 1121 through a second throttling hole 154. While realizing the matching communication of the second branch flow channel 1511 and the main flow channel 1121, the amount of cooling liquid flowing to the second branch flow channel 1511 can also be conveniently controlled through the second throttling hole 154, so as to conveniently control the flow of cooling liquid for cooling the mover shaft, and conveniently ensure the cooling effect of the mover shaft.

[0180] In a specific example, the amount of cooling liquid flowing to the second branch flow channel 1511 is controlled by controlling the aperture of the second throttling hole 154.

[0181] The diameter of the second throttling hole 154 is determined during the machining of the motor 100.

[0182] In some embodiments, as shown in FIG. 1, the first end cover 152 and the second end cover 153 are connected at the first end cover 152 and the second end cover 153. Figure 8 As shown in FIG. 1, at the connection of the first end cover 152 and the second end cover 153, one of the radial ends of the first end cover 152 and the second end cover 153 is provided with a recess 1531, and the other radial end of the first end cover 152 and the second end cover 153 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531. It can be understood that, when the radial end of the first end cover 152 is provided with the recess 1531, the radial end of the second end cover 153 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531; when the radial end of the second end cover 153 is provided with the recess 1531, the radial end of the first end cover 152 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531 (as shown in FIG. 2), so as to realize the connected fitting of the first end cover 152 and the second end cover 153, and the recess 1531 can also ensure the sealing of the connection of the first end cover 152 and the second end cover 153, and improve the connection quality of the first end cover 152 and the second end cover 153. Figure 8 As shown in FIG. 1, at the connection of the first end cover 152 and the second end cover 153, one of the radial ends of the first end cover 152 and the second end cover 153 is provided with a recess 1531, and the other radial end of the first end cover 152 and the second end cover 153 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531. It can be understood that, when the radial end of the first end cover 152 is provided with the recess 1531, the radial end of the second end cover 153 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531; when the radial end of the second end cover 153 is provided with the recess 1531, the radial end of the first end cover 152 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531 (as shown in FIG. 2), so as to realize the connected fitting of the first end cover 152 and the second end cover 153, and the recess 1531 can also ensure the sealing of the connection of the first end cover 152 and the second end cover 153, and improve the connection quality of the first end cover 152 and the second end cover 153.

[0183] As shown in FIG. 1, at the connection of the first end cover 152 and the second end cover 153, one of the radial ends of the first end cover 152 and the second end cover 153 is provided with a recess 1531, and the other radial end of the first end cover 152 and the second end cover 153 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531. It can be understood that, when the radial end of the first end cover 152 is provided with the recess 1531, the radial end of the second end cover 153 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531; when the radial end of the second end cover 153 is provided with the recess 1531, the radial end of the first end cover 152 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531 (as shown in FIG. 2), so as to realize the connected fitting of the first end cover 152 and the second end cover 153, and the recess 1531 can also ensure the sealing of the connection of the first end cover 152 and the second end cover 153, and improve the connection quality of the first end cover 152 and the second end cover 153. Figure 8 Figure 8 As shown in FIG. 1, at the connection of the first end cover 152 and the second end cover 153, one of the radial ends of the first end cover 152 and the second end cover 153 is provided with a recess 1531, and the other radial end of the first end cover 152 and the second end cover 153 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531. It can be understood that, when the radial end of the first end cover 152 is provided with the recess 1531, the radial end of the second end cover 153 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531; when the radial end of the second end cover 153 is provided with the recess 1531, the radial end of the first end cover 152 is limitedly fitted in the recess 1531 and abuttingly fitted with the inner circumferential wall of the recess 1531 (as shown in FIG. 2), so as to realize the connected fitting of the first end cover 152 and the second end cover 153, and the recess 1531 can also ensure the sealing of the connection of the first end cover 152 and the second end cover 153, and improve the connection quality of the first end cover 152 and the second end cover 153.

[0184] ​It should be noted that by providing the recess 1531 on one of the radial ends of the first end cover 152 and the second end cover 153, and limiting the other radial end of the first end cover 152 and the second end cover 153 in the recess 1531 and abutting with the inner wall of the recess 1531, the first end cover 152 and the second end cover 153 can be designed with a centering shaft hole matching feature, that is, a stop, which has a small matching gap, generally designed in the gap range of 0mm-0.1mm. The end of the second branch flow channel 1511 or the third branch flow channel 1512 is formed at the recess 1531, and even if the cooling liquid flowing between the second branch flow channel 1511 and the third branch flow channel 1512 leaks through the stop matching, it is formed as a micro-leakage, which is within an acceptable range and does not affect the distribution result of the cooling liquid.

[0185] In some embodiments, the driving device 1000 further comprises an output shaft connected to the mover shaft and a second support bearing (not shown in the figure) for supporting the output shaft. Wherein, by setting the output shaft connected to the mover shaft, the mover of the mover shaft is transmitted out by the output shaft, which to some extent ensures the working performance of the motor 100.

[0186] At the same time, by setting the second support bearing to support the output shaft, the positional stability of the output shaft is improved, making the rotation of the output shaft more smooth, which to some extent ensures the working performance of the output shaft.

[0187] Optionally, as shown in Figure 8 The second end cover 153 is formed with a fifth outlet flow channel 1532 communicating with the third branch flow channel 1512, and the fifth outlet flow channel 1532 is used for conveying cooling liquid towards the second support bearing. Thus, the second support bearing can be cooled and lubricated by the cooling liquid, prolonging the service life of the second support bearing, and facilitating the reduction of friction between the second support bearing and the output shaft, making the rotation of the output shaft more smooth, which to some extent ensures the working performance of the output shaft.

[0188] In some embodiments, in combination with Figure 3 , Figure 4 and Figure 9 As shown, the end cover 150 is provided with a cooling cavity 155, and the cooling cavity 155 is provided with a conductive connecting piece 160 adapted to be electrically connected with the outside, and the conductive connecting piece 160 is used for electrically connecting with the stator winding 121. To achieve the electrical connection between the external power supply and the stator winding 121, so as to facilitate the input of three-phase alternating current to the stator winding 121 to generate a rotating magnetic field, which to some extent ensures the working performance of the stator winding 121.

[0189] In some embodiments, the conductive connecting piece 160 is a copper bar.

[0190] Optionally, in combination with Figure 9and Figure 10 As shown in the figure, the fourth cooling flow channel 156 is arranged inside the end cover 150, and the fourth cooling flow channel 156 is communicated with the first cooling flow channel 112. The fourth cooling flow channel 156 is provided with a sixth outlet flow channel 1561 communicated with the cooling cavity 155. That is, the first cooling flow channel 112 is communicated with the fourth cooling flow channel 156, and the fourth cooling flow channel 156 is communicated with the cooling cavity 155 through the sixth outlet flow channel 1561 to realize the cooperative communication of the cooling cavity 155 and the first cooling flow channel 112, so as to facilitate the output of the cooling liquid in the first cooling flow channel 112 into the cooling cavity 155. Since the electrically conductive connecting piece 160 is arranged in the cooling cavity 155, the cooling liquid can be used to cool the electrically conductive connecting piece 160, so as to reduce the temperature of the electrically conductive connecting piece 160, prolong the service life of the electrically conductive connecting piece 160, and ensure the working performance of the electrically conductive connecting piece 160 to a certain extent.

[0191] In addition, by directly arranging the fourth cooling flow channel 156 inside the end cover 150, the integration of the fourth cooling flow channel 156 and the end cover 150 can be realized, and the arrangement of various complex oil guiding members can be cancelled, so as to simplify the structure of the driving device 1000.

[0192] In some embodiments, as shown in Figure 9 The fourth cooling flow channel 156 is hollowly formed in the inner wall of the end cover 150, so that the fourth cooling flow channel 156 is arranged in the inner wall of the end cover 150, and the forming difficulty of the fourth cooling flow channel 156 is reduced.

[0193] In some embodiments, as shown in Figure 9 and Figure 10 The fourth cooling flow channel 156 includes a fourth branch flow channel 1562 and a fifth branch flow channel 1563 communicated with each other. The fourth branch flow channel 1562 is arranged in the first end cover 152 and communicated with the main flow channel 1121. The fifth branch flow channel 1563 is arranged in the second end cover 153, and the second end cover 153 is provided with the cooling cavity 155. The sixth outlet flow channel 1561 is arranged on the inner wall of the second end cover 153. The fifth branch flow channel 1563 and the cooling cavity 155 are cooperatively communicated through the sixth outlet flow channel 1561. The fourth branch flow channel 1562 is respectively communicated with the main flow channel 1121 and the fifth branch flow channel 1563, so as to realize the cooperative communication of the main flow channel 1121 and the cooling cavity 155, reduce the difficulty of the cooperative communication of the main flow channel 1121 and the cooling cavity 155, facilitate the output of the cooling liquid in the main flow channel 1121 into the cooling cavity 155, and achieve the purpose of cooling the electrically conductive connecting piece 160.

[0194] In some embodiments, as shown in Figure 9And Figure 10 As shown in

[0195] Wherein, the fastener 180 can be understood as a connecting bolt, to achieve the fixing of the conductive connecting piece 160, improve the position stability of the conductive connecting piece 160, and to a certain extent, ensure the working performance of the conductive connecting piece 160.

[0196] In some embodiments, the driving device 1000 further comprises a reducer, which is arranged outside the motor 100, and the housing 110 is provided with a seventh outlet flow channel 118 (as shown in Figure 17 The seventh outlet flow channel 118 communicates with the inside of the reducer to transport cooling liquid towards the moving parts of the reducer. Thus, the moving parts of the reducer can be cooled, which is conducive to prolonging the service life of the reducer.

[0197] In some embodiments, in combination with Figure 16 And Figure 17 As shown in

[0198] At the same time, by arranging the seventh outlet flow channel 118 on the end wall 116 of the housing 110, the seventh outlet flow channel 118 can be arranged close to the reducer, reducing the cooling difficulty of the reducer.

[0199] In a specific example, the seventh outlet flow channel 118 is used to transport cooling liquid towards the planetary gear train of the reducer.

[0200] In some embodiments, the driving device 1000 further comprises a differential, and the motor 100 as the power source of the driving device 1000 converts electrical energy into mechanical energy to generate a rotary torque, so as to drive the input shaft of the reducer to rotate. At this time, the reducer inside converts the high-speed low-torque power of the motor 100 into low-speed high-torque power through a series of gear or planetary gear mechanisms and other transmission elements, and then the reducer transmits power to the differential, and the differential transmits power to the wheels through output shaft and other transmission elements, so as to drive the vehicle 3000 to move forward or backward, and to a certain extent, ensure the working performance of the driving device 1000.

[0201] In summary, the driving device 1000 of the present application not only does not need to additionally increase the complicated oil guide, but also simultaneously sprays oil to the radially inner and outer sides of the stator winding 121, the stator core 122, the mover shaft, the moving part of the speed reducer, the first support bearing supporting the mover shaft, the second support bearing supporting the output shaft, and the conductive connecting part 160 electrically connecting the stator winding 121, so as to improve the heat dissipation effect of the driving device 1000, reduce the manufacturing cost of the driving device 1000, and make the driving device 1000 compact in structure.

[0202] The vehicle 3000 of the embodiment of the present application will be described below with reference to the accompanying drawings.

[0203] As shown in Figure 1 , the vehicle 3000 of the embodiment of the present application comprises the driving device 1000 of the above embodiment.

[0204] Since the driving device 1000 of the embodiment of the present application has the above technical effects, the vehicle 3000 of the embodiment of the present application also has the above technical effects, that is, by adopting the driving device 1000 of the present application, the heat dissipation effect of the driving device 1000 of the vehicle 3000 can be improved to a certain extent, the heat dissipation cost of the driving device 1000 is reduced, and the working performance of the vehicle 3000 is ensured to a certain extent.

[0205] It can be understood that other configurations of the driving device 1000 of the embodiment of the present application and the vehicle 3000 having the same, such as the specific structure and working principle of the speed reducer, are known to those skilled in the art, and will not be described in detail here.

[0206] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0207] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A driving device, characterized in that, The application relates to an electric machine (100) comprising: a housing (110) having an accommodation cavity (111) formed in the inside of the housing (110), and a stator assembly (120) comprising a stator winding (121) arranged in the accommodation cavity (111), wherein a first cooling flow channel (112) is formed in the wall of the housing (110) and is adapted to be filled with a cooling liquid, and the first cooling flow channel (112) is communicated with the accommodation cavity (111) through a first outlet flow channel (113) arranged at least corresponding to the stator winding (121) to deliver the cooling liquid to the stator winding (121). The housing (110) has a side wall (114) extending along the axial direction of the electric machine (100), and at least part of the first cooling flow channel (112) is arranged in the side wall (114).

2. The drive apparatus according to claim 1, characterized by The first outlet flow channel (113) comprises a first communication section (1131) and a first outlet (1132) arranged on the inner circumferential wall of the side wall (114), and the flow area of the first outlet (1132) is smaller than that of the first communication section (1131).

3. The drive apparatus according to claim 2, characterized by The side wall (114) is hollowed in the inside to form at least part of the first cooling flow channel (112); or 4. Drive arrangement according to claim 2 or 3, characterized in that The side wall (114) comprises a main body (1141) and a sealing cover (1142), the outer side wall of the main body (1141) is provided with a groove, the sealing cover (1142) is arranged on the outer side wall of the main body (1141) and seals the groove, the sealing cover (1142) cooperates with the groove to form at least part of the first cooling flow channel (112), and the first outlet flow channel (113) is arranged in the main body (1141). The stator assembly (120) further comprises a stator core (122) arranged in the accommodation cavity (111), and the stator winding (121) is arranged in the stator core (122), the housing (110) is further provided with a second outlet flow channel (115) communicated with the first cooling flow channel (112) and the accommodation cavity (111) respectively, and the second outlet flow channel (115) is opposite to the stator core (122).

5. Drive arrangement according to any of claims 2-4, characterized in that, The second outlet flow channel (115) comprises a second communication section (1151) and a second outlet (1152) arranged on the inner circumferential wall of the side wall (114), and the flow area of the second outlet (1152) is larger than that of the second communication section (1151).

6. The drive apparatus according to claim 5, characterized by In the axial direction of the electric machine (100), part of the stator winding (121) protrudes out of the stator core (122), and the first outlet flow channel (113) and the second outlet flow channel (115) are arranged in the axial direction of the electric machine (100) in a spaced manner, so that the first outlet flow channel (113) is opposite to the stator winding (121) protruding out of the stator core (122).

7. Drive arrangement according to claim 5 or 6, characterized in that ​ 8. The drive arrangement of any one of claims 1-7, wherein, The flow channel assembly (130) is arranged at least partially radially inward of the stator winding (121), and is provided with a second cooling flow channel (131) and a third outlet flow channel (132). The second cooling flow channel (131) is in communication with the first cooling flow channel (112), and the third outlet flow channel (132) is in communication with the second cooling flow channel (131) and has a third outlet (1321) facing radially inward of the stator winding (121).

9. The drive apparatus according to claim 8, characterized by The flow channel assembly (130) extends circumferentially along the stator winding (121), and the second cooling flow channel (131) is arranged near a top of the flow channel assembly (130), and the third outlet flow channel (132) is arranged on a top wall of the flow channel assembly (130).

10. The drive apparatus according to claim 9, characterized by The third outlet flow channel (132) includes a plurality of third outlet flow channels (132) arranged circumferentially along the flow channel assembly (130) at intervals.

11. Drive arrangement according to any of claims 8-10, characterized in that, A maximum distance between any two points of the third outlet (1321) is 0.5-3 mm.

12. Drive arrangement according to any of claims 8-11, characterized in that, The stator assembly (120) further includes a stator core (122), and part of the stator winding (121) extends out of the stator core (122) in the axial direction of the motor (100), and the flow channel assembly (130) is arranged radially inward of the stator winding (121) extending out of the stator core (122).

13. Drive arrangement according to any of claims 8-12, characterized in that, The housing (110) includes a side wall (114) extending in the axial direction of the motor (100) and an end wall (116) arranged at one axial end of the side wall (114), and the flow channel assembly (130) is arranged in the accommodating cavity (111) and adjacent to the end wall (116). The first cooling flow channel (112) includes a main flow channel (1121) and a first branch flow channel (1122) in communication with each other. The main flow channel (1121) is arranged on the side wall (114), the first branch flow channel (1122) is arranged on the end wall (116), the first outlet flow channel (113) is arranged on the side wall (114) and in communication with the main flow channel (1121), and the second cooling flow channel (131) is in communication with the first branch flow channel (1122).

14. The drive apparatus according to claim 13, characterized by The second cooling flow channel (131) is in communication with the first branch flow channel (1122) through a first throttling hole (117).

15. Drive arrangement according to claim 13 or 14, characterized in that The motor (100) further includes a rotor assembly arranged radially inward of the stator assembly (120) and coupled with the stator assembly (120), and a first support bearing for supporting a rotor shaft of the rotor assembly.

16. The drive apparatus according to claim 15, characterized by The end wall (116) is formed with a fourth outlet flow channel (1161) in communication with the first branch flow channel (1122), and the fourth outlet flow channel (1161) is used for conveying cooling liquid towards the first support bearing.

17. The drive apparatus according to claim 16, characterized by The fourth outlet flow channel (1161) extends in the axial direction of the motor (100).

18. Drive arrangement according to claim 16 or 17, characterized in that The fourth outlet flow channel (1161) comprises a plurality of fourth outlet flow channels (1161) arranged opposite in the axial direction of the motor (100).

19. Drive arrangement according to any of claims 15-18, characterized in that The motor (100) further comprises a magnetic ring (140) arranged close to the first support bearing.

20. The drive apparatus according to claim 19, characterized by The flow channel assembly (130) is arranged close to the first support bearing, and the magnetic ring (140) is fixed to the flow channel assembly (130).

21. Drive arrangement according to any of claims 15-20, characterized in that, The motor (100) further comprises an end cover (150) arranged on the other side of the side wall (114) in the axial direction, and a third cooling flow channel (151) is arranged inside the peripheral wall of the end cover (150), and the third cooling flow channel (151) is in communication with the main flow channel (1121) and the internal flow channel of the mover shaft respectively.

22. The drive apparatus according to claim 21, characterized by The end cover (150) comprises a first end cover (152) and a second end cover (153), the first end cover (152) is connected with the side wall (114), and the second end cover (153) is arranged on the radially inner side of the first end cover (152); the third cooling flow channel (151) comprises a second branch flow channel (1511) and a third branch flow channel (1512) in communication with each other, the second branch flow channel (1511) is arranged in the first end cover (152) and in communication with the main flow channel (1121), and the third branch flow channel (1512) is arranged in the second end cover (153) and in communication with the internal flow channel.

23. The drive apparatus according to claim 22, characterized by The second branch flow channel (1511) is in communication with the main flow channel (1121) through a second throttling hole (154).

24. Drive arrangement according to claim 22 or 23, characterized in that At the connection between the first end cover (152) and the second end cover (153), one of the radial ends of the first end cover (152) and the second end cover (153) is provided with a recess (1531), and the other radial end of the first end cover (152) and the second end cover (153) is limitedly fitted in the recess (1531) and abuts against the inner peripheral wall of the recess (1531); The end of the second branch flow channel (1511) or the third branch flow channel (1512) is formed at the recess (1531) to realize the sealing fit of the second branch flow channel (1511) and the third branch flow channel (1512).

25. The drive arrangement of any of claims 22-24, wherein, The motor (100) further comprises an output shaft connected with the mover shaft and a second support bearing for supporting the output shaft. The second end cover (153) is formed with a fifth outlet flow channel (1532) in communication with the third branch flow channel (1512), and the fifth outlet flow channel (1532) is used for conveying cooling liquid towards the second support bearing.

26. The drive arrangement of any of claims 22-25, wherein, The end cover (150) is provided with a cooling cavity (155), and a conductive connecting piece (160) adapted to be electrically connected with the outside is arranged in the cooling cavity (155), and the conductive connecting piece (160) is used for electrically connecting with the stator winding (121); The end cover (150) is internally provided with a fourth cooling flow channel (156) which is communicated with the first cooling flow channel (112), and the fourth cooling flow channel (156) is provided with a sixth outlet flow channel (1561) communicated with the cooling cavity (155).

27. The drive apparatus according to claim 26, wherein The fourth cooling flow channel (156) comprises a fourth branch flow channel (1562) and a fifth branch flow channel (1563) which are communicated with each other, the fourth branch flow channel (1562) is arranged on the first end cover (152) and communicated with the main flow channel (1121), the fifth branch flow channel (1563) is arranged on the second end cover (153), the second end cover (153) is provided with the cooling cavity (155), and the sixth outlet flow channel (1561) is arranged on the inner wall of the second end cover (153).

28. The drive apparatus according to any one of claims 1-27, wherein, Further comprising a speed reducer arranged outside the motor (100), and the shell (110) is provided with a seventh outlet flow channel (118) communicated with the first cooling flow channel (112), and the seventh outlet flow channel (118) is communicated with the inside of the speed reducer to convey the cooling liquid to the moving part of the speed reducer.

29. A vehicle characterized by The drive device comprises the drive device according to any one of claims 1-28.

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