An electric drive device and vehicle

Abstract

This application discloses an electric drive device and a vehicle. The electric drive device includes a housing, and a motor assembly, a transmission assembly, and an output assembly housed within the housing's internal space. The transmission assembly includes a planetary gear assembly and a drive shaft. The output shaft of the motor assembly, the planetary gear assembly, and the drive shaft are sequentially meshed on a first rotation axis. The output assembly is disposed along a second rotation axis and meshes with the drive shaft. The first and second rotation axes are parallel but not coincident. Thus, the drive shaft and the planetary gear assembly are connected in the direction of the first rotation axis and rotate on the first rotation axis via the output shaft. The output assembly meshes with the outer circumference of the drive shaft, causing the output assembly to rotate about a second rotation axis parallel to the first rotation axis. This reduces the torque of the output shaft, increases the transmission ratio of the electric drive device, and reduces the space occupied by the electric drive device, thereby enabling the electric drive device to achieve lower power density and smaller size.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an electric drive device and a vehicle. Background Technology

[0002] With the development of the new energy technology industry and industry competition, the development of new energy vehicle platforms has posed greater challenges to the performance, layout space, and cost of electric drive systems.

[0003] Currently, electric drive systems typically consist of a motor and multiple transmission components. These components are sequentially connected to the motor's output shaft in a radial direction perpendicular to the motor's axial direction to achieve a high speed ratio. However, this configuration occupies a significant amount of space, and the speed ratio still needs improvement. Therefore, achieving lower power density and a smaller footprint with a low-cost solution is an urgent goal. Summary of the Invention

[0004] The main objective of this application is to provide an electric drive device and vehicle, which aims to solve the aforementioned technical problems existing in the prior art.

[0005] To address the aforementioned problems, this application provides an electric drive device comprising a housing, a motor assembly, a transmission assembly, and an output assembly. The housing forms a receiving space; the motor assembly is disposed within the receiving space and fixedly connected to the housing, and includes an output shaft; the transmission assembly is disposed within the receiving space, and includes a planetary gear assembly and a transmission shaft, the planetary gear assembly meshing with the output shaft, and the transmission shaft meshing with the planetary gear assembly, the output shaft being used to rotate about a first rotation axis to drive the transmission shaft to rotate about the first rotation axis via the planetary gear assembly; the output assembly is disposed within the receiving space, the output assembly meshing with the transmission shaft, and the output assembly being used to rotate about a second rotation axis during the rotation of the transmission shaft about the first rotation axis, wherein the first rotation axis and the second rotation axis are parallel and do not coincide.

[0006] In some embodiments, the planetary gear assembly includes a plurality of planetary gears, an internal gear ring, and a planet carrier. The plurality of planetary gears are spaced apart about a first rotation axis, each planetary gear meshes with an output shaft, the plurality of planetary gears are located inside the internal gear ring and mesh with the internal gear ring respectively, and the planet carrier is connected to the plurality of planetary gears and the drive shaft respectively.

[0007] In some embodiments, the planetary carrier includes a first connecting disk and a connecting shaft. The first connecting disk is connected to a plurality of planetary gears on the side opposite to the motor assembly along a first rotation axis. The connecting shaft is located on the side of the first connecting disk opposite to the plurality of planetary gears and extends along the first rotation axis. A transmission shaft is sleeved on the outer periphery of the connecting shaft.

[0008] In some embodiments, the planetary carrier includes a second connecting disk and a connecting portion. The second connecting disk is connected to one side of the plurality of planetary gears along a first rotation axis toward the motor assembly, and the connecting portion extends along the direction of the first rotation axis and connects the first connecting disk and the second connecting disk respectively.

[0009] In some embodiments, the electric drive device is provided with a flow channel, which includes a flow guiding component for guiding lubricating fluid to the planetary gear.

[0010] In some embodiments, the flow guiding assembly includes a flow deflector connected to a plurality of planetary gears on the side opposite to the motor assembly along a first rotation axis. The flow deflector is used to rotate with the plurality of planetary gears about the first rotation axis to deliver lubricating fluid within the flow deflector to the plurality of planetary gears.

[0011] In some embodiments, the swirl plate includes an oil storage plate and a plurality of liquid outlets, the plurality of liquid outlets being spaced apart around a first rotation axis, the plurality of liquid outlets being connected to the side of the oil storage plate near the planetary gear, and each planetary gear corresponding to at least one liquid outlet.

[0012] In some embodiments, the planetary gear includes a planetary central shaft and a planetary bearing sleeved on the outer periphery of the planetary central shaft. The planetary central shaft is fixed to the planetary carrier. The planetary central shaft has a planetary central channel extending along the axis of the planetary central shaft and a liquid outlet hole penetrating the inner and outer sides of the planetary central shaft. The planetary central channel passes through the end of the planetary central shaft near the liquid outlet, and each planetary central channel is for insertion of a corresponding liquid outlet.

[0013] In some embodiments, the swirl plate includes an inlet pipe, and an annular inlet groove is provided on the side of the oil storage plate away from the outlet nozzle, which is arranged around the first rotation axis. The opening of the annular inlet groove is opened on the side of the oil storage plate away from the multiple planetary gears. The outlet end of the inlet pipe extends into the annular inlet groove from the opening. During the rotation of the oil storage plate around the first rotation axis, the annular inlet groove avoids the inlet pipe.

[0014] In some embodiments, the flow guiding assembly includes a flow divider tube, which includes a flow divider outlet end located on a first rotation axis between a plurality of planetary gears. The flow divider outlet end is provided with a plurality of outlets, and each planetary gear corresponds to at least one outlet.

[0015] In some embodiments, the drive shaft and the planetary carrier together form a receiving channel on the first rotation axis for accommodating and fixing a portion of the diversion tube, and each outlet and the corresponding planetary gear rotate synchronously.

[0016] In some embodiments, the electric drive device is provided with a cooling filter channel, the housing is formed with a main channel, and an oil sump is formed in the lower part of the housing in the direction of gravity. The oil sump is connected to the cooling filter channel through an oil pumping element, and the end of the cooling filter channel away from the oil pumping element is connected to the main channel and the flow guiding assembly.

[0017] In some embodiments, the housing is further provided with a first flow channel, which is spaced apart from the flow guide assembly in the direction of the first rotation axis, and the first flow channel is used to guide the lubricating fluid to the planetary gear.

[0018] To address the aforementioned problems, this application provides a vehicle that includes the aforementioned electric drive device.

[0019] Compared with the prior art, the electric drive device provided in this application includes a housing, a motor assembly, a transmission assembly, and an output assembly. The housing forms a receiving space; the motor assembly is disposed within the receiving space and fixedly connected to the housing, and the motor assembly includes an output shaft; the transmission assembly is disposed within the receiving space, and the transmission assembly includes a planetary gear assembly and a transmission shaft. The planetary gear assembly meshes with the output shaft, and the transmission shaft meshes with the planetary gear assembly. The output shaft is used to rotate about a first rotation axis to drive the transmission shaft to rotate about the first rotation axis through the planetary gear assembly; the output assembly is disposed within the receiving space, and the output assembly meshes with the transmission shaft. The output assembly is used to rotate about a second rotation axis during the rotation of the transmission shaft about the first rotation axis, wherein the first rotation axis and the second rotation axis are parallel and do not coincide. In the above embodiments, the drive shaft and planetary gear assembly are connected in the direction of the first rotation axis and rotate on the first rotation axis via the output shaft. The output assembly meshes with the outer periphery of the drive shaft so that the output assembly rotates around a second rotation axis parallel to the first rotation axis. This reduces the torque of the output shaft, increases the transmission speed ratio of the electric drive device, and reduces the space occupied by the electric drive device, thereby enabling the electric drive device to achieve a smaller power density and a smaller volume. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the electric drive device provided in this application;

[0022] Figure 2 yes Figure 1 The diagram shows the disassembled structure of the electric drive unit.

[0023] Figure 3 yes Figure 2 A disassembled structural diagram of one embodiment of the transmission assembly is shown;

[0024] Figure 4 yes Figure 3 A schematic diagram of one embodiment of the jet-throwing disk is shown;

[0025] Figure 5 yes Figure 4 A schematic diagram of one embodiment of the diverter shown;

[0026] Figure 6 yes Figure 1 A cross-sectional view of the electric drive unit shown along the AA direction;

[0027] Figure 7 yes Figure 6 An enlarged structural diagram at the dashed elliptical box O;

[0028] Figure 8 yes Figure 1 The diagram shows the internal structure of the shell.

[0029] Figure 9 yes Figure 1 The electric drive unit shown is a cross-sectional view along the BB direction.

[0030] Reference numerals: Electric drive unit 10; Housing 100; Front cover 110; Main housing 120; Rear cover 130; Support wall 140; Support flow channel 141; First branch flow channel 142; Annular support 150; Horizontal flow channel 151; Vertical flow channel 152; Isolation wall 160; Motor assembly 200; Output shaft 210; Transmission assembly 300; Planetary gear assembly 310; Planetary gear 311; Planetary central shaft 3111; Planetary central channel 3112; Planetary bearing 3113; Liquid outlet 3114; Internal gear ring 312; Planetary carrier 313; First connecting plate 3131; Connecting shaft 3132; Second connecting plate 3133; Connecting part 3134; Drive shaft 320; First rotating axis 330; Second rotating axis 340; Output component 400; Flow guiding component 500; Flow deflector 510; Oil storage plate 511; Annular inlet groove 512; Liquid outlet 513; Inlet pipe 514; Diverter pipe 520; Diverter outlet end 521; Liquid outlet 522; Cooling filter channel 600; Oil filter 610; Oil cooler 620; Connecting oil pipe 630; Main channel 700; First axial channel 710; Motor section 711; Transmission section 712; Radial channel 720; Oil sump 800; Return oil channel 810; Containment channel 910; Second axial channel 920; Second diverter channel 930; Third diverter channel 940. Detailed Implementation

[0031] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0033] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0037] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0038] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0039] With the development of new energy technologies and increased competition within the industry, as well as the evolution of new energy vehicle platforms, greater challenges have been posed to the performance, layout space, and cost of electric drive systems. Currently, electric drive devices typically consist of a motor and multiple transmission components. These components are sequentially connected to the motor's output shaft in a radial direction perpendicular to the motor's axial direction to achieve a high speed ratio. However, this configuration occupies a significant amount of space, and the speed ratio still needs improvement. Therefore, achieving lower power density and a smaller footprint with a low-cost solution is an urgent goal.

[0040] To address the related technical problems, this application provides a vehicle that includes the following electric drive device.

[0041] To address the related technical problems, this application also provides an electric drive device, for details please refer to [link / reference needed]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of the electric drive device provided in this application. Figure 2 yes Figure 1 The diagram shows the disassembled structure of the electric drive unit.

[0042] The electric drive device 10 includes a housing 100, a motor assembly 200, a transmission assembly 300, and an output assembly 400. The housing 100 forms a receiving space. The motor assembly 200 is disposed within the receiving space and fixedly connected to the housing 100. The motor assembly 200 includes an output shaft 210. The transmission assembly 300 is disposed within the receiving space and includes a planetary gear assembly 310 and a transmission shaft 320. The planetary gear assembly 310 meshes with the output shaft 210, and the transmission shaft 320 meshes with the planetary gear assembly 310. The output shaft 210 is used to rotate about a first rotation axis 330 to drive the transmission shaft 320 to rotate about the first rotation axis 330 via the planetary gear assembly 310. The output assembly 400 is disposed within the receiving space and meshes with the transmission shaft 320. The output assembly 400 is used to rotate about a second rotation axis 340 during the rotation of the transmission shaft 320 about the first rotation axis 330. The first rotation axis 330 and the second rotation axis 340 are parallel and do not coincide.

[0043] The housing 100 has a receiving space for accommodating various components inside the electric drive device 10, such as the motor assembly 200, transmission assembly 300, and output assembly 400. The motor assembly 200 is sequentially connected to the transmission assembly 300 and the output assembly 400. The output assembly 400 is connected to a wheel, thereby enabling the motor assembly 200 to drive the wheel to rotate via the transmission assembly 300 and the output assembly 400. For example, the housing 100 may include a main housing 120 and a front cover 110 and a rear cover 130 connected to both ends of the main housing 120. The two ends of the main housing 120 are correspondingly connected to the front cover 110 and the rear cover 130, thus forming a receiving space inside the housing 100. The internal components can be installed onto the main housing 120 first, and then the front cover 110 and the rear cover 130 can be connected to the main housing 120, facilitating the installation of the motor assembly 200, transmission assembly 300, and output assembly 400.

[0044] The motor assembly 200 may include a stator, a rotor, and an output shaft 210. The rotor is sleeved on the outer periphery of the output shaft 210. The stator is fixed to the housing 100 and is sleeved on the outside of the rotor and spaced apart from the rotor. The stator and the rotor are connected by a magnetic field, which causes the rotor to drive the output shaft 210 to rotate, so as to provide the driving force for the electric drive device 10.

[0045] The transmission assembly 300 includes a planetary gear assembly 310 and a drive shaft 320. The planetary gear assembly 310 meshes with the output shaft 210, the drive shaft 320 meshes with the planetary gear assembly 310, and the output assembly 400 meshes with the drive shaft 320. Specifically, the output shaft 210 rotates around its own axis, which is defined as the first rotation axis 330. The output shaft 210, the planetary gear assembly 310, and the drive shaft 320 are arranged sequentially and meshed on the first rotation axis 330. The output end of the output shaft 210 may be provided with a sun gear. The output shaft 210 can mesh with the planetary gear assembly 310 via the sun gear, and the drive shaft 320 meshes with the planetary gear assembly 310 on the first rotation axis 330. This allows the output shaft 210 to drive the planetary gear assembly 310 and the drive shaft 320 to rotate around the first rotation axis 330 via the sun gear. The planetary gear assembly 310 can provide a high speed ratio, thereby reducing the torque of the motor assembly 200. The output shaft 210 and the sun gear can be integrated, which can reduce the risk of abnormal noise between the sun gear and the planet gear assembly 310 due to the large floating amount of the sun gear.

[0046] The output component 400 rotates around a second rotation axis 340, which is another axis parallel to but not coincident with the first rotation axis 330. Specifically, the output component 400 may include an output central shaft and a transmission gear sleeved on the outer periphery of the output central shaft. The output central shaft and the transmission shaft 320 are spaced apart in a direction perpendicular to the first rotation axis 330. The axis of the output central shaft can be understood as the second rotation axis 340. The output component 400 meshes with the outer periphery of the transmission shaft 320 through the transmission gear. This allows the motor component 200 to drive the output component 400 to rotate around the second rotation axis 340 via the transmission component 300. The outer periphery of the transmission shaft 320 and the outer periphery of the transmission gear may include external splines, and the transmission shaft 320 and the transmission gear can be connected by external splines. The output component 400 may include a differential assembly, which can be used to adjust the speed difference between the two wheels.

[0047] Through the above embodiments, the drive shaft 320 and the planetary gear assembly 310 are connected in the direction of the first rotation axis 330 and rotate on the first rotation axis 330 through the output shaft 210. The output assembly 400 meshes with the outer periphery of the drive shaft 320 so that the output assembly 400 rotates about the second rotation axis 340 parallel to the first rotation axis 330. This can reduce the torque of the output shaft 210, increase the transmission speed ratio of the electric drive device 10, and reduce the space occupied by the electric drive device 10, thereby enabling the electric drive device 10 to achieve a smaller power density and a smaller volume.

[0048] See Figure 3 , Figure 3 yes Figure 2 A disassembled structural diagram of one embodiment of the transmission assembly is shown.

[0049] In some embodiments, the planetary gear assembly 310 includes a plurality of planetary gears 311, an internal gear ring 312, and a planet carrier 313. The plurality of planetary gears 311 are spaced apart around a first rotation axis 330. Each planetary gear 311 meshes with an output shaft 210. The plurality of planetary gears 311 are located inside the internal gear ring 312 and mesh with the internal gear ring 312 respectively. The planet carrier 313 connects the plurality of planetary gears 311 and the drive shaft 320 respectively.

[0050] Multiple planetary gears 311 are spaced apart around a first rotation axis 330, providing meshing positions for the sun gear of the output shaft 210 of the motor assembly 200. The planetary gears 311 are located around the sun gear and mesh with it. The planetary gears 311 are situated within an internal gear ring 312, and the side of each planetary gear 311 furthest from the sun gear also meshes with the internal teeth of the internal gear ring 312, which is fixed to the housing 100. A planet carrier 313 is connected to both ends of the multiple planetary gears 311 on the first rotation axis 330, allowing the output shaft 210 to transmit driving force to the planetary gears 311, which then transmits it to the drive shaft 320 via the planet carrier 313. This enables the planet carrier 313 and the drive shaft 320 to rotate synchronously, achieving high-speed ratio transmission between the output shaft 210 and the drive shaft 320, thus reducing the torque of the motor assembly 200. Compared to existing technologies, by setting up the planetary gear assembly 310, the power of the motor assembly 200 can be reduced while the wheels have the same rotational speed.

[0051] In some embodiments, the planetary carrier 313 includes a first connecting disk 3131 and a connecting shaft 3132. The first connecting disk 3131 is connected to a plurality of planetary gears 311 on the side away from the motor assembly 200 along a first rotation axis 330. The connecting shaft 3132 is located on the side of the first connecting disk 3131 away from the plurality of planetary gears 311 and extends along the first rotation axis 330. A transmission shaft 320 is sleeved on the outer periphery of the connecting shaft 3132.

[0052] A first connecting disc 3131 is disposed on the side of the plurality of planetary gears 311 opposite to the motor assembly 200 on the first rotation axis 330. A connecting shaft 3132 is connected to the side of the first connecting disc 3131 opposite to the plurality of planetary gears 311. The connecting shaft 3132 extends along the first rotation axis 330 and is connected to the transmission shaft 320 for transmission. Exemplarily, the transmission shaft 320 may be hollow along the first rotation axis 330. An internal spline may be provided on the inner side of the transmission shaft 320, and an external spline may be provided on the connecting shaft 3132. The internal spline of the transmission shaft 320 and the external spline of the connecting shaft 3132 mesh, enabling the transmission shaft 320 and the planet carrier 313 to rotate coaxially. Thus, the transmission shaft 320 and the planet carrier 313 can rotate synchronously, achieving a high speed ratio between the transmission shaft 320 and the output shaft 210. Furthermore, the transmission shaft 320 can be sleeved on the outer periphery of the connecting shaft 3132, allowing for a separate arrangement between the planetary gear assembly 310 and the transmission shaft 320. During operation of the electric drive unit 10, this arrangement reduces the risk of abnormal noise generated by the electric drive unit 10 due to the transmission shaft 320 applying axial force to the planetary gear assembly 310 in the direction of the first rotation axis 330. Furthermore, the end of the connecting shaft 3132 near the first connecting disc 3131 can also be spaced apart from the first connecting disc 3131 in the direction of the first rotation axis 330, thereby further reducing the risk of abnormal noise generated by the electric drive unit 10.

[0053] In some embodiments, the planetary carrier 313 includes a second connecting disk 3133 and a connecting portion 3134. The second connecting disk 3133 is connected to the side of the plurality of planetary gears 311 facing the motor assembly 200 along the first rotation axis 330, and the connecting portion 3134 extends along the direction of the first rotation axis 330 and connects the first connecting disk 3131 and the second connecting disk 3133 respectively.

[0054] The second connecting disk 3133 and the first connecting disk 3131 are spaced apart along the first rotation axis 330. The second connecting disk 3133 is connected to the side of the plurality of planetary gears 311 facing the motor assembly 200 along the first rotation axis 330. The connecting portion 3134 extends along the first rotation axis 330, and both ends of the connecting portion 3134 are connected to the first connecting disk 3131 and the second connecting disk 3133. Exemplarily, both the first connecting disk 3131 and the second connecting disk 3133 are provided with a plurality of through holes arranged around the first rotation axis 330. Each through hole of the first connecting disk 3131 is opposite to one through hole of the second connecting disk 3133 along the first rotation axis 330. Both ends of each planetary gear 311 are inserted into one through hole of the first connecting disk 3131 and one corresponding through hole of the second connecting disk 3133. The number of through holes in the first connecting disk 3131 and the second connecting disk 3133, as well as the number of planetary gears 311, are the same. The connecting portion 3134 extends in the direction of the first rotation axis 330, and both ends of the connecting portion 3134 are respectively connected to the first connecting disk 3131 and the second connecting disk 3133. Thus, the multiple planetary gears 311 and both ends of the connecting portion 3134 are respectively connected to the first connecting disk 3131 and the second connecting disk 3133, thereby improving the rotational stability of the planetary gear assembly 310.

[0055] In this embodiment, the number of connecting portions 3134 can be multiple. Further, the number of connecting portions 3134 can be the same as the number of planetary gears 311. Each connecting portion 3134 is spaced apart in the circumferential direction of the planet carrier 313. Each connecting portion 3134 is located between two adjacent planetary gears 311 in the circumferential direction of the planet carrier 313 and has a gap with the planetary gears 311. This further improves the stability of the planetary gear assembly 310 during rotation and reduces the risk of abnormal noise caused by the planetary gear assembly 310 shifting its center of gravity.

[0056] See Figures 4 to 6 , Figure 4 yes Figure 3 The diagram shows a structural schematic of one embodiment of the jetting disk. Figure 5 yes Figure 4 The diagram shows a structural schematic of one embodiment of the manifold. Figure 6 yes Figure 1 The electric drive unit shown is a cross-sectional view along the AA direction.

[0057] In some embodiments, the planetary carrier 313 further includes a support shaft connected to the second connecting disc 3133 on the side opposite to the plurality of planetary gears 311. The support shaft is arranged around the first rotation axis 330, and is sleeved on the outer periphery of the output shaft 210, with the inner side of the support shaft spaced apart from the outer periphery of the output shaft 210. The transmission shaft 320 includes an external spline section, and a first connecting section and a second connecting section connected to both ends of the external spline section. The inner periphery of the first connecting section meshes with the external spline of the connecting shaft 3132 via an internal spline. The transmission assembly 300 further includes a first support bearing, a second support bearing, and a third support bearing spaced upward and downward in the direction of the first rotation axis 330. The outer peripheries of the first support bearing, the second support bearing, and the third support bearing are all fixed to the housing 100. The first support bearing is sleeved on the outer periphery of the support shaft, the second support bearing is sleeved on the outer periphery of the first connecting section, and the third support bearing is sleeved on the outer periphery of the second connecting section. Therefore, the planetary gear assembly 310 and the drive shaft 320 are separately arranged. The transmission assembly 300 includes a first support bearing, a second support bearing, and a third support bearing that are spaced apart on the first rotation axis 330. The first support bearing, the second support bearing, and the third support bearing are respectively sleeved on the planetary gear assembly 310 and the drive shaft 320, thereby reducing the floating amount of the planetary gear assembly 310 and the drive shaft 320 and reducing the risk of abnormal noise from the transmission assembly 300.

[0058] In some embodiments, the electric drive device 10 is provided with a flow channel, which includes a flow guide assembly 500 for guiding lubricating fluid to the planetary gear 311.

[0059] The flow channel can be understood as the collective term for all the channels within the electric drive unit 10 that guide the lubricating fluid. As an example, the flow channel may be disposed on the housing 100, and the flow guiding component 500 of the flow channel is used to guide the lubricating fluid to the planetary gear 311. As another example, the flow channel may be disposed along the first rotation axis 330 to lubricate and dissipate heat from the planetary gear 311. As yet another example, the flow channel may be disposed either on the housing 100 or along the first rotation axis 330 to provide multi-directional lubrication and heat dissipation for the gear. Thus, the flow guiding component 500 can guide the internal lubricating fluid to the planetary gear 311, thereby lubricating and dissipating heat from the planetary gear 311, and thus improving the service life of the electric drive unit 10.

[0060] In some embodiments, the flow guiding assembly 500 includes a flow deflector 510, which is connected to a plurality of planetary gears 311 on the side away from the motor assembly 200 along a first rotation axis 330. The flow deflector 510 is used to rotate with the plurality of planetary gears 311 about the first rotation axis 330 so that the lubricating fluid in the flow deflector 510 is directed to the plurality of planetary gears 311.

[0061] The centrifugal disk 510 has an oil passage and can be connected to the side of the multiple planetary gears 311 opposite to the motor assembly 200 in the direction of the first rotation axis 330. This allows the centrifugal disk 510 to rotate around the first rotation axis 330 along with the planetary gear assembly 310. Consequently, the lubricating fluid inside the centrifugal disk 510 is guided to the multiple planetary gears 311 by centrifugal force, thus providing heat dissipation and lubrication for the planetary gears 311. Furthermore, as the centrifugal disk 510 rotates around the first rotation axis 330, the lubricating fluid, when guided from the centrifugal disk 510 to the multiple planetary gears 311, has a certain speed, which increases the contact area between the lubricating fluid and the planetary gears 311, improving lubrication effect and heat dissipation efficiency.

[0062] In some embodiments, the swirl plate 510 includes an oil storage plate 511 and a plurality of liquid outlets 513. The plurality of liquid outlets 513 are spaced apart around a first rotation axis 330. The plurality of liquid outlets 513 are connected to the side of the oil storage plate 511 near the planetary gear 311. Each planetary gear 311 corresponds to at least one liquid outlet 513.

[0063] The oil reservoir 511 can be annular in structure and can be fixed to the side of the first connecting disk 3131 of the planetary carrier 313 away from the planetary gears 311. The oil reservoir 511 has an internal oil storage space, and multiple liquid outlets 513 are spaced apart around the first rotation axis 330. One end of each liquid outlet 513 communicates with the oil storage space. The liquid outlets 513 are located on the side of the oil reservoir 511 closest to the planetary gears 311, and the ends of the liquid outlets 513 away from the oil reservoir 511 correspond to the planetary gears 311. The number of liquid outlets 513 can be greater than the number of planetary gears 311; or, the number of liquid outlets 513 can be equal to the number of planetary gears 311. Thus, each planetary gear 311 can correspond to at least one liquid outlet 513, which can improve the lubrication and heat dissipation of the planetary gears 311.

[0064] See Figure 7 , Figure 7 yes Figure 6 An enlarged structural diagram of the area within the dashed elliptical box O.

[0065] In some embodiments, the planetary gear 311 includes a planetary central shaft 3111 and a planetary bearing 3113 sleeved on the outer periphery of the planetary central shaft 3111. The planetary central shaft 3111 is fixed to the planetary carrier 313. The planetary central shaft 3111 is provided with a planetary central channel 3112 extending along the axis of the planetary central shaft 3111 and a liquid outlet 3114 penetrating the inner and outer sides of the planetary central shaft 3111. The planetary central channel 3112 passes through one end of the planetary central shaft 3111 near the liquid outlet 513, and each planetary central channel 3112 is used for the insertion of a corresponding liquid outlet 513.

[0066] The planetary gear 311 includes a planetary central shaft 3111, a planetary bearing 3113 sleeved on the outer periphery of the planetary central shaft 3111, and an external toothed portion sleeved on the outer periphery of the planetary bearing 3113. The planetary central shaft 3111 has a planetary central channel 3112 arranged along its own axis. The planetary central channel 3112 penetrates one end of the planetary central shaft 3111 near the centrifugal disk 510 in the direction of the first rotation axis 330, allowing a corresponding liquid outlet 513 to be inserted. Furthermore, the planetary central shaft 3111 also has a liquid outlet hole 3114, which penetrates both the inner and outer surfaces of the planetary central shaft 3111, communicating with the planetary central channel 3112. Multiple liquid outlet holes 3114 can be arranged around the axis of the planetary central shaft 3111. As an example, the number of nozzles 513 can be equal to the number of planetary gears 311. Each nozzle 513, with one end away from the oil reservoir 511, is inserted into a corresponding planetary central channel 3112, thereby providing heat dissipation and lubrication to the planetary gears 311 from the inside out. As another example, the number of nozzles 513 can be greater than the number of planetary gears 311. Some nozzles 513 are inserted into the planetary central channel 3112 to lubricate and dissipate heat to the planetary gears 311 from the inside out, while others are slightly spaced from the planetary gears 311 in the direction of the first rotation axis 330 to lubricate and dissipate heat to the planetary gears 311 from the outside in. Specifically, these nozzles 513 can be positioned opposite the planetary bearing 3113 in the direction of the first rotation axis 330. Therefore, the lubricating fluid in the oil reservoir 511 can be guided to the planetary central channel 3112. During the rotation of the star gear assembly around the first rotation axis 330, the lubricating fluid can be guided to the meshing position of the planetary bearing 3113, the planetary central shaft 3111, and the external teeth under the action of centrifugal force. This allows for sufficient heat dissipation and lubrication of the planetary central shaft 3111, the planetary bearing 3113, and the external teeth of the planetary gear 311, thereby improving the lubrication and heat dissipation effect.

[0067] In this embodiment, multiple liquid outlets 513 are evenly spaced in the circumferential direction of rotation around the first rotation axis 330, and multiple planetary gears 311 are also evenly spaced, thereby improving the stability of the planetary gear assembly 310 during rotation.

[0068] In some embodiments, the planetary bearing 3113 may include a plurality of rollers, a cage, and an outer ring. The outer ring is fitted around the outer periphery of the planetary central shaft 3111 and spaced apart from the planetary central shaft 3111. The plurality of rollers are spaced apart around the outer periphery of the planetary central shaft 3111 and are mounted within the cage. The cage and the plurality of rollers are located between the planetary central shaft 3111 and the outer ring, and each roller rotates directly between the outer ring and the planetary central shaft 3111. During the rotation of the planetary gear 311 around the first rotation axis 330, the lubricating fluid can be guided to various positions of the planetary bearing 3113 under the action of centrifugal force, thereby increasing the contact surface between the components within the planetary bearing 3113 and the lubricating fluid, and allowing more lubricating fluid to be guided to the inner side of the external gear. Thus, the planetary central shaft 3111, the components within the planetary bearing 3113, and the external gear of the planetary gear 311 can all be effectively lubricated and cooled, thereby improving the lubrication and heat dissipation effect of the planetary gear 311.

[0069] In some embodiments, such as Figure 5 and Figure 6 As shown, the swirl plate 510 includes an inlet pipe 514. An annular inlet groove 512 is provided on the side of the oil storage plate 511 away from the outlet nozzle 513, which is arranged around the first rotation axis 330. The opening of the annular inlet groove 512 is opened on the side of the oil storage plate 511 away from the multiple planetary gears 311. The outlet end of the inlet pipe 514 extends into the annular inlet groove 512 from the groove opening. During the rotation of the oil storage plate 511 around the first rotation axis 330, the annular inlet groove 512 avoids the inlet pipe 514.

[0070] The flow plate 510 includes an inlet pipe 514, which is spaced apart from the oil reservoir body 511. The inlet pipe 514 is used to guide the lubricating fluid in the inlet pipe 514 into the oil reservoir body 511. Specifically, an annular inlet groove 512 is provided inside the oil reservoir body 511. The annular inlet groove 512 is arranged around the first rotation axis 330. The annular inlet groove 512 is used to store the lubricating fluid and guide the lubricating fluid to each outlet nozzle 513. The opening of the annular inlet groove 512 is opened on the side of the oil reservoir body 511 away from the multiple planetary gears 311. The opening of the annular inlet groove 512 is also arranged around the first rotation axis 330. The outlet end of the inlet pipe 514 enters the annular inlet groove 512 through the groove, thereby guiding the lubricating fluid in the inlet pipe 514 into the annular inlet groove 512. Furthermore, there is a gap between the peripheral side of the liquid outlet end of the inlet pipe 514 and the annular inlet groove 512. During the rotation of the oil storage pan 511 around the first rotation axis 330, the annular inlet groove 512 and the inlet pipe 514 form a clearance. Thus, the lubricating fluid can be guided to the oil storage pan 511 without affecting the rotation of the oil storage pan 511 and the liquid outlet 513.

[0071] In this embodiment, the liquid outlet of the inlet pipe 514 can be located in the lower part of the annular inlet groove 512 in the direction of gravity, thereby increasing the amount of lubricating fluid in the inlet pipe 514 entering the annular inlet groove 512, providing a basis for sufficient heat dissipation and lubrication for the planetary gear 311.

[0072] In some embodiments, the flow guiding assembly 500 includes a diversion pipe 520, which includes a diversion outlet end 521. The diversion outlet end 521 is located on a first rotation axis 330 between a plurality of planetary gears 311. The diversion outlet end 521 is provided with a plurality of outlets 522, and each planetary gear 311 corresponds to at least one outlet 522.

[0073] One end of the diversion pipe 520 includes a diversion outlet end 521, which is located on the first rotation axis 330 between a plurality of planetary gears 311. In other words, the plurality of planetary gears 311 are spaced apart from the first rotation axis 330 in a radial direction perpendicular to the first rotation axis 330, thereby forming a gap between the plurality of planetary gears 311 for accommodating the sun gear, which is also used to accommodate the diversion outlet end 521. The diversion outlet end 521 is provided with a plurality of outlets 522, which are spaced apart around the first rotation axis 330, and the plurality of outlets 522 correspond to the plurality of planetary gears 311. For example, the number of outlets 522 may be equal to the number of planetary gears 311, so that each planetary gear 311 can correspond to one outlet 522; or, the number of outlets 522 may be greater than the number of planetary gears 311, so that one planetary gear 311 can correspond to multiple outlets 522. Therefore, the shunt pipe 520 can lubricate and dissipate heat for each planetary gear 311, thereby improving the service life of the electric drive unit 10.

[0074] In this embodiment, the number of liquid outlets 522 can be equal to the number of planetary gears 311. Each liquid outlet 522 corresponds to the meshing point between the sun gear and a planetary gear 311, thereby lubricating and dissipating heat at the meshing point between the external teeth of the planetary gear 311 and the sun gear. This ensures sufficient lubrication and heat dissipation on the outer periphery of the planetary gears 311 and the sun gear. Furthermore, the multiple liquid outlets 522 can be at a certain angle to the first rotation axis 330, so that each liquid outlet 522 is inclined, allowing more of the lubricating fluid flowing from the outlet 522 to be guided to the meshing point between the sun gear and the planetary gears, increasing the contact area between the sun gear and the planetary gears 311 and the lubricating fluid, thereby improving the lubrication and heat dissipation effect.

[0075] In general, the flow channel includes a flow guide assembly 500, which includes a flow divider 520 and a flow deflector 510. The flow divider 520 is used for lubrication and heat dissipation at the meshing points between the sun gear and each planetary gear 311 meshing with the sun gear, and the flow deflector 510 is used for lubrication and heat dissipation of the interior of each planetary gear 311. Thus, the flow guide assembly 500 can provide multi-directional and sufficient lubrication and heat dissipation for the planetary gears 311.

[0076] In some embodiments, such as Figure 6 As shown, the drive shaft 320 and the planetary carrier 313 together form a receiving channel 910 on the first rotation axis 330 for accommodating and fixing part of the diversion pipe 520, and each liquid outlet 522 and the corresponding planetary gear 311 rotate synchronously.

[0077] Both the drive shaft 320 and the planetary carrier 313 are hollow along the first rotation axis 330, with the hollow portion of the planetary carrier 313 being the connecting section. The hollow interiors of the drive shaft 320 and the planetary carrier 313 form a receiving channel 910 extending along the first rotation axis 330, which accommodates the diverter pipe 520. Specifically, the diverter pipe 520 includes a pipe body housed within the receiving channel 910. The pipe body and the receiving channel 910 may have two connection points, spaced apart along the first rotation axis 330. One connection point connects the pipe body to the inner side of the connecting section, and the other connection point connects the pipe body to the inner side of the drive shaft 320. This design allows the diverter pipe 520 to be more stable as it rotates with the planetary carrier 313 and the drive shaft 320, and reduces the risk of abnormal noise from the inside of the diverter pipe 520 and the receiving channel 910. The diversion outlet 521 is located at one end of the tube body near the multiple planetary gears 311, and at least partially extends out of the corresponding connecting section of the receiving channel 910, so that each outlet 522 of the diversion outlet 521 corresponds to the meshing point of the external teeth of the planetary gears 311 and the sun gear. Thus, the diversion tube 520 rotates synchronously with the planetary carrier 313 and the drive shaft 320, ensuring that each outlet 522 is always aligned with the meshing point between the planetary gears 311 and the sun gear, thereby improving the lubrication and heat dissipation effect on the planetary gears 311 and the sun gear.

[0078] See Figure 8 , Figure 8 yes Figure 1 The diagram shows the internal structure of the shell.

[0079] In some embodiments, referencing Figure 6The electric drive unit 10 is provided with a cooling filter channel 600, the housing 100 forms a main channel 700, and an oil sump 800 is formed in the lower part of the housing 100 in the direction of gravity. The oil sump 800 is connected to the cooling filter channel 600 through an oil pumping element. The end of the cooling filter channel 600 away from the oil pumping element is connected to the main channel 700 and the flow guiding component 500.

[0080] An oil sump 800 is formed in the lower part of the housing 100 in the direction of gravity. An oil outlet is provided on the wall of the oil sump 800. An oil pump is provided on the side of the wall away from the oil sump 800, and the oil inlet of the oil pump is connected to the oil outlet of the oil sump 800. The rear cover 130 of the housing 100 corresponds to the side of the drive shaft 320 and the output assembly 400 away from the planetary gear assembly 310. A connecting channel is provided on the rear cover 130. One end of the connecting channel is connected to the oil outlet of the oil pump, and the other end of the connecting channel is provided with an oil storage tank. The oil storage tank and the oil filter 610 cooperate to form a sealed cavity. The portion of the oil filter 610 used to filter the lubricating fluid is contained in this cavity. The drive unit also includes an oil cooler 620, which can be installed outside the housing 100 to improve cooling efficiency. The oil cooler 620 and the oil filter 610 can be connected by a connecting oil pipe 630, thereby forming a cooling and filtering channel 600 by the connecting flow channel between the oil filter 610 and the oil pump, the connecting oil pipe 630, the oil filter 610 and the oil cooler 620.

[0081] The connecting oil pipe 630 is provided with a branch port, which is located between the oil cooler 620 and the oil filter 610. The branch port is positioned above the output assembly 400 in the direction of gravity, thereby providing heat dissipation and lubrication for the output assembly 400. Specifically, the branch port may be located above the differential assembly.

[0082] The housing 100 has a main flow channel 700. The housing 100 has oil inlet holes for the main flow channel 700 at positions corresponding to the oil cooler 620 and the main flow channel 700, to guide the lubricating fluid cooled by the oil cooler 620 to the main flow channel 700. The main flow channel 700 may include a first axial flow channel 710 and a radial flow channel 720. The first axial flow channel 710 is disposed on the sidewall of the main housing 120 and the rear cover 130, and is formed jointly by the main housing 120 and the rear cover 130. The first axial flow channel 710 extends along the direction of the first rotation axis 330. The radial flow channel 720 may be disposed on the side of the rear cover 130 facing away from the drive shaft 320 in the direction of the first rotation axis 330. The first axial flow channel 710 and the radial flow channel 720 are connected to form the main flow channel 700. The first axial flow channel 710 may include a motor section 711 and a transmission section 712. The motor section 711 corresponds to the motor assembly 200, and the transmission section 712 corresponds to the transmission assembly 300. The transmission section 712 is connected to the end of the inlet pipe 514 of the swirl plate 510 away from the oil reservoir 511. The end of the radial flow channel 720 away from the first axial flow channel 710 is connected to the end of the main body of the branch pipe 520 away from the branch outlet end 521. This achieves communication between the main flow channel 700 and the guide assembly 500, so that the lubricating fluid in the oil sump 800 can be guided to various parts of the planetary gear assembly 310 through the cooling filter channel 600, the main flow channel 700, and the guide assembly 500, thereby achieving multi-directional lubrication and heat dissipation of the planetary gear assembly 310. After the lubricating fluid lubricates and cools the planetary gear assembly 310, it falls back into the oil sump 800 below due to gravity. As a result, the various flow channels form a circulation, continuously lubricating and cooling the planetary gear assembly 310, which has better lubrication and heat dissipation efficiency.

[0083] In some embodiments, such as Figure 6As shown, except for the hollow connection section between the drive shaft 320 and the planetary carrier 313, the motor output shaft 210 is also hollow along the first rotation axis 330 to form a second axial flow channel 920. A portion of the diverter pipe 520 is housed within the receiving channel 910. The diverter outlet 521 of the diverter pipe 520 also includes a main outlet end, which is located on the first rotation axis 330 and corresponds to the port of the second axial flow channel 920, thereby guiding a portion of the lubricating fluid in the diverter pipe 520 to the second axial flow channel 920. At least two through holes are provided on the sidewall of the second axial flow channel 920, penetrating the inner and outer sides of the output shaft 210. These two through holes are spaced apart in the direction of the first rotation axis 330. A first bearing connecting flow channel and a second bearing connecting flow channel are also provided between the rotor and the output shaft 210. The first bearing connecting flow channel and the second bearing connecting flow channel extend in the direction of the first rotation axis 330 and are spaced apart in the circumferential direction of the output shaft. Understandably, a first output bearing is fitted onto the outer periphery of one end of the output shaft 210 near the transmission assembly 300, and a second output bearing is fitted onto the other end. One through-hole is located near the first output bearing, connecting to the end of the second bearing connecting channel near the first output bearing; the other end of the second bearing connecting channel corresponds to the second output bearing. The other through-hole is also located near the second output bearing, connecting to the end of the first bearing connecting channel near the second output bearing; the other end of the first bearing connecting channel corresponds to the first output bearing. Thus, the first and second bearing connecting channels can effectively dissipate heat from the rotor, and also effectively lubricate and dissipate heat from the first and second output bearings of the output shaft 210.

[0084] In some embodiments, the motor section 711 of the first axial flow channel 710 further includes two stator oil outlet holes spaced apart in the direction of the first rotation axis 330. The two stator oil outlet holes correspond to the winding ends at both ends of the stator, thereby dissipating heat for the stator and its windings. Further, each winding at both ends of the stator is provided with an oil injection ring, which surrounds the first rotation axis 330. The interior of the oil injection ring communicates with the stator oil outlet holes to guide lubricating fluid to the oil injection ring. The oil injection ring has multiple spaced-apart oil injection ports circumferentially. Thus, heat dissipation can be achieved for various parts of the windings through the oil injection ring, improving the heat dissipation efficiency of the windings.

[0085] In some embodiments, such as Figure 6As shown, an annular support 150 is also provided within the accommodating space. The annular support 150 is detachably connected to the housing 100, and its inner circumferential side is connected to the second support bearing, thereby providing stable support for the second support bearing. The annular support 150 has a transverse flow channel 151 extending in the direction of the first rotation axis 330 and a vertical flow channel 152 arranged in a radial direction perpendicular to the first rotation axis 330. The vertical flow channel 152 and the transverse flow channel 151 are connected. The two sides of the portion of the annular support 150 with the transverse flow channel 151 are connected to the main housing 120 and the rear cover 130, thereby forming a first axial flow channel 710. That is, the two ends of the portion of the annular support 150 with the transverse flow channel 151 are connected to the portions of the main housing 120 and the rear cover 130 with flow channels, thereby forming the first axial flow channel 710. The vertical flow channel 152 is connected to the inlet pipe 514 of the slinger 510, thereby guiding the lubricating fluid to the slinger 510. The port of the vertical flow channel 152, away from the horizontal flow channel 151, also corresponds to the second support bearing, thus providing lubrication and heat dissipation for the second support bearing. Furthermore, since the radial dimension of the planetary gear assembly 310 is larger than the radial dimension of the second support bearing, and the annular support 150 is connected to the second support bearing, configuring the annular support 150 to be detachably connected to the housing 100 facilitates the installation of the planetary gear assembly 310.

[0086] In this embodiment, the transmission section 712 of the first axial flow channel 710 includes a transmission main shell section and a transmission rear cover section. The transmission main shell section is a flow channel of the main shell 120 corresponding to the transmission section 712, and the transmission rear cover section is a flow channel of the rear cover 130 corresponding to the transmission section 712. The main shell 120 also includes a first connecting portion disposed on the outside of the transmission main shell section, and the rear cover 130 also includes a second connecting portion disposed on the outside of the transmission rear cover section. The first connecting portion and the second connecting portion are disposed around the first rotation axis 330, and are disposed opposite to each other and connected in the direction of the first rotation axis 330, thereby forming a closed accommodating space. The transmission main shell section, the transverse flow channel 151, and the transmission rear cover section are connected in sequence to form the first axial flow channel 710. Therefore, the annular support 150 is located inside the housing 100 and together with the main housing 120 and the rear cover 130, forms the first axial flow channel 710. This not only enables communication between the main flow channel 700 and the flow guiding assembly 500, but also reduces the sealing requirements between the rear cover 130, the annular support 150, and the main housing 120, thereby reducing the risk of leakage due to poor sealing. In addition, it is beneficial to reduce the size of the annular support 150, thereby increasing the rigidity of the annular support 150 and further facilitating the support of the drive shaft 320 by the second support bearing.

[0087] In some embodiments, such as Figure 6As shown, the housing 100 is also provided with a first flow channel 142, which is spaced apart from the flow guide assembly 500 in the direction of the first rotation axis 330. The first flow channel 142 is used to guide the lubricating fluid to the planetary gear 311.

[0088] The drive unit may also include a support wall 140, which can be understood as part of the housing 100. The support wall 140 extends from the outer peripheral wall of the housing 100 toward the first support bearing. The inner side of the support wall 140 is circular, so that the outer periphery of the first support bearing and the first output bearing are fixed to the support wall 140, thereby providing a good support foundation for the first support bearing and the first output bearing. A support flow channel 141 is formed inside the support wall 140. The support flow channel 141 communicates with the first axial flow channel 710 and the first branch flow channel 142. The first branch flow channel 142 can be connected to the middle of the support flow channel 141, and the other end of the first branch flow channel 142 corresponds to the planet carrier 313. Thus, the lubricating fluid in the first branch flow channel 142 can be guided to the planet carrier 313, and then fall back from the planet carrier 313 to the planet gear 311. When the planetary carrier 313 rotates at a low speed and the lubricating fluid flowing out of the distributor pipe 520 and the slinger plate 510 is less, the first distributor channel 142 can compensate for the deficiency of less oil being slinged out by the distributor pipe 520 and the slinger plate 510.

[0089] In addition, there is a gap between the first support bearing and the first output bearing, and the port of the support flow channel 141 away from the first axial flow channel 710 corresponds to the gap between the first support bearing and the first output shaft 210 bearing, so that the first support bearing and the first output shaft 210 bearing can be lubricated and cooled.

[0090] See Figure 9 , Figure 9 yes Figure 1 The electric drive unit shown is a cross-sectional view along the BB direction.

[0091] In some embodiments, the rear cover 130 is further provided with a second branch channel 930 and a third branch channel 940 at one end corresponding to the transmission assembly 300 in the direction of the first rotation axis 330. One end of the second branch channel 930 and the third branch channel 940 is connected to the radial flow channel 720, and the other end of the second branch channel 930 and the third branch channel 940 corresponds to the meshing point between the transmission gear on the outside of the output assembly 400 and the outer spline section of the transmission shaft 320, thereby lubricating and dissipating heat at the meshing point between the output assembly 400 and the transmission shaft 320. Specifically, the ends of the second branch channel 930 and the third branch channel 940 away from the radial flow channel 720 are located on both sides of the meshing point between the outer spline section and the transmission gear in the radial direction perpendicular to the first rotation axis 330. That is to say, the oil outlet ends of the second branch channel 930 and the third branch channel 940 respectively correspond to the positive and negative meshing points between the output assembly 400 and the transmission shaft 320. This can further improve the lubrication and heat dissipation effect at the meshing point between the output component 400 and the drive shaft 320.

[0092] In some embodiments, such as Figure 6 and 8 As shown, the internal accommodating space of the housing 100 can be divided into an interconnected motor cavity, a transmission cavity, and an output cavity, which respectively house the motor assembly 200, the transmission assembly 300, and the output assembly 400. The motor cavity and the transmission cavity are separated from each other by a support wall 140, and the transmission cavity and the output cavity are connected in a direction perpendicular to the first rotation axis 330. The housing 100 includes a partition wall 160, which is disposed in the lower part of the housing 100 in the direction of gravity and located between the transmission cavity and the output cavity. The partition wall 160 isolates the lower parts of the transmission cavity and the output cavity, thereby forming an oil sump 800 on the side of the partition wall 160 near the transmission cavity. Thus, the oil sump 800 is relatively isolated from the output cavity by the partition wall 160, thereby reducing the agitation of the lubricating fluid in the oil sump by the output assembly 400, thereby reducing the amount of oil that needs to be added inside the drive device, reducing the load of the lubricating fluid on each component, improving the performance of the drive device, and reducing costs.

[0093] In some embodiments, the housing 100 is further provided with an oil return channel 810 at its lower part in the gravity direction. The oil return channel 810 extends in the direction of the first rotation axis 330, corresponds to the motor cavity and the transmission cavity, and is sealed relative to the motor cavity and the transmission cavity. The oil return channel 810 communicates with the oil sump 800. The oil return channel 810 has oil return ports at both ends in the direction of the first rotation axis 330. The two oil return ports communicate with the motor cavity and the transmission cavity respectively, so that the lubricating fluid in the motor cavity and the transmission cavity is guided to the oil sump 800 through the oil return channel 810. Thus, the oil return channel 810 communicates with the motor cavity and the transmission cavity only through two oil return ports, so that the oil return channel 810 is relatively isolated from the motor cavity and the transmission cavity, thereby further reducing the agitation of the lubricating fluid by the motor assembly 200 and the transmission assembly 300, reducing the load of the lubricating fluid on each component, improving the performance of the drive device and reducing costs.

[0094] In summary, the drive shaft 320 and the planetary gear assembly 310 are connected in the direction of the first rotation axis 330 and rotate on the first rotation axis 330 via the output shaft 210. The output assembly 400 meshes with the outer periphery of the drive shaft 320 so that the output assembly 400 rotates about the second rotation axis 340 parallel to the first rotation axis 330. This reduces the torque of the output shaft 210, increases the transmission ratio of the electric drive device 10, and reduces the space occupied by the electric drive device 10, thereby enabling the electric drive device 10 to achieve a smaller power density and a smaller size.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electric drive device, characterized in that, The electric drive device includes: The shell forms a space for containment; A motor assembly is disposed within the receiving space and fixedly connected to the housing; the motor assembly includes an output shaft. A transmission assembly is disposed within the receiving space. The transmission assembly includes a planetary gear assembly and a drive shaft. The planetary gear assembly meshes with the output shaft, and the drive shaft meshes with the planetary gear assembly. The output shaft is used to rotate about a first rotation axis to drive the drive shaft to rotate about the first rotation axis via the planetary gear assembly. An output component is disposed within the receiving space, the output component meshes with the drive shaft, and the output component is used to rotate about a second rotation axis during the rotation of the drive shaft about the first rotation axis, wherein the first rotation axis and the second rotation axis are parallel and do not coincide; The planetary gear assembly includes multiple planetary gears, an internal gear ring, and a planet carrier. The multiple planetary gears are spaced apart around the first rotation axis. Each planetary gear meshes with the output shaft. The multiple planetary gears are located inside the internal gear ring and mesh with the internal gear ring. The planet carrier connects the multiple planetary gears and the drive shaft. The electric drive device is provided with a flow channel, which includes a flow guiding component for guiding lubricating fluid to the planetary gear; The flow guiding assembly includes a flow deflector, which is connected to the side of the plurality of planetary gears opposite to the motor assembly along the first rotation axis. The flow deflector is used to rotate with the plurality of planetary gears around the first rotation axis to deliver lubricating fluid in the flow deflector to the plurality of planetary gears.

2. The electric drive device according to claim 1, characterized in that, The planetary carrier includes a first connecting disk and a connecting shaft. The first connecting disk is connected to the side of the plurality of planetary gears opposite to the motor assembly along the first rotation axis. The connecting shaft is located on the side of the first connecting disk opposite to the plurality of planetary gears and extends along the first rotation axis. The transmission shaft is sleeved on the outer periphery of the connecting shaft.

3. The electric drive device according to claim 2, characterized in that, The planetary carrier includes a second connecting plate and a connecting portion. The second connecting plate is connected to one side of the plurality of planetary gears along the first rotation axis toward the motor assembly. The connecting portion extends along the first rotation axis and connects the first connecting plate and the second connecting plate respectively.

4. The electric drive device according to claim 1, characterized in that, The swirl plate includes an oil storage plate and multiple liquid outlets. The multiple liquid outlets are spaced apart around the first rotation axis. The multiple liquid outlets are connected to the side of the oil storage plate near the planetary gear. Each planetary gear corresponds to at least one liquid outlet.

5. The electric drive device according to claim 4, characterized in that, The flow-throwing plate includes an inlet pipe. An annular inlet groove is provided on the side of the oil storage plate away from the outlet nozzle, which is arranged around the first rotation axis. The opening of the annular inlet groove is located on the side of the oil storage plate away from the plurality of planetary gears. The outlet end of the inlet pipe extends into the annular inlet groove from the opening. During the rotation of the oil storage plate around the first rotation axis, the annular inlet groove avoids the inlet pipe.

6. The electric drive device according to claim 4, characterized in that, The planetary gear includes a planetary central shaft and a planetary bearing sleeved on the outer periphery of the planetary central shaft. The planetary central shaft is fixed to the planetary carrier. The planetary central shaft has a planetary central channel extending along the axis of the planetary central shaft and a liquid outlet hole penetrating the inner and outer sides of the planetary central shaft. The planetary central channel passes through the end of the planetary central shaft near the liquid outlet, and each planetary central channel is for inserting a corresponding liquid outlet.

7. The electric drive device according to claim 1, characterized in that, The flow guiding assembly includes a flow divider tube, which includes a flow divider outlet end located on the first rotation axis between multiple planetary gears. The flow divider outlet end is provided with multiple outlets, and each planetary gear corresponds to at least one outlet.

8. The electric drive device according to claim 7, characterized in that, The drive shaft and the planetary carrier together form a receiving channel on the first rotation axis for accommodating and fixing part of the diversion pipe, and each liquid outlet and the corresponding planetary gear rotate synchronously.

9. The electric drive device according to claim 1, characterized in that, The electric drive device is provided with a cooling filter channel, the housing forms a main channel, and an oil sump is formed in the lower part of the housing in the direction of gravity. The oil sump is connected to the cooling filter channel through an oil pumping element, and the end of the cooling filter channel away from the oil pumping element is connected to the flow guiding assembly through the main channel.

10. The electric drive device according to claim 9, characterized in that, The housing is also provided with a first flow channel, which is spaced apart from the flow guide assembly in the direction of the first rotation axis. The first flow channel is connected to the main flow channel and is used to guide the lubricating fluid to the planetary gear.

11. A vehicle, characterized in that, The vehicle includes the electric drive unit as described in any one of claims 1 to 10.

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