Electric drive shell, electric drive assembly, new energy automobile and electric drive assembly assembling method

Abstract

The invention provides an electric drive shell, an electric drive assembly, a new energy automobile and an electric drive assembly assembling method.A controller cavity is formed in a main shell, a speed reducer shell is detachably and fixedly connected with the main shell, and a motor cavity and a speed reduction cavity which are parallel and communicate with each other are formed in the speed reducer shell and the main shell; the motor cavity is used for installing a stator assembly, a rotor assembly and a motor shaft assembly, the speed reduction cavity is used for installing a speed reducer transmission assembly, an installation window communicated with the controller cavity is formed in the main shell, the controller upper cover covers the installation window, and a first motor shaft seat for installing a motor shaft is formed on the main shell. A second motor shaft seat for installing a motor shaft is formed on the speed reducer shell, an intermediate shaft seat for installing an intermediate shaft of the speed reducer transmission assembly is further formed on the speed reducer shell, the movable bearing seat is arranged in the speed reduction cavity and detachably and fixedly connected with the main shell, and the movable bearing seat is used for installing the intermediate shaft of the speed reducer transmission assembly. The cost of the electric drive assembly can be reduced.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to an electric drive housing, an electric drive assembly, a new energy vehicle, and an assembly method for the electric drive assembly. Background Technology

[0002] The competition in the new energy electric vehicle market is becoming increasingly fierce, requiring electric drive assemblies to have lower costs in order to improve market competitiveness. In order to reduce the cost of electric drive assemblies, the number of housings that make up the electric drive assembly in existing technologies is decreasing. Currently, electric drive housings that only include a reducer housing, a main housing, a rear end cover, a wiring cover, and a controller cover have emerged. The various housings of this type of electric drive housing need to be connected by bolts, which makes processing and assembly difficult.

[0003] Therefore, it is necessary to develop an electric drive housing, electric drive assembly, new energy vehicle, and electric drive assembly assembly assembly method to reduce the number of housings in the electric drive housing, thereby reducing the cost of the electric drive assembly. Summary of the Invention

[0004] The purpose of this invention is to provide an electric drive housing, an electric drive assembly, a new energy vehicle, and an assembly method for the electric drive assembly, so as to solve the problem that the existing electric drive housing, electric drive assembly, and new energy vehicle have a large number of housings, resulting in high costs.

[0005] To solve the above-mentioned technical problems, the present invention provides an electric drive housing, including a main housing, a reducer housing, a controller cover, and a movable bearing seat. The main housing forms a controller cavity. The reducer housing is detachably and fixedly connected to the main housing. The reducer housing and the main housing form a parallel and communicating motor cavity and a reduction cavity. The motor cavity is used to install a stator assembly, a rotor assembly, and a motor shaft assembly. The reduction cavity is used to install a reducer transmission assembly. The main housing has an installation window communicating with the controller cavity. The controller cover is placed on the installation window. The main housing has a first motor shaft seat for installing the motor shaft. The reducer housing has a second motor shaft seat for installing the motor shaft. The reducer housing also has an intermediate shaft seat for installing the intermediate shaft of the reducer transmission assembly. The movable bearing seat is disposed in the reduction cavity and is detachably and fixedly connected to the main housing. The movable bearing seat is used for installing the intermediate shaft of the reducer transmission assembly. The electric drive housing omits the fixed support between the main housing and the reducer housing for supporting the reducer transmission assembly and / or the motor shaft assembly.

[0006] Optionally, the reduction chamber is also used to install the differential assembly, and the main housing is also provided with a first bearing hole for mounting the first output shaft of the differential assembly, and the reducer housing is provided with a second bearing hole for mounting the second output shaft of the differential assembly.

[0007] Optionally, the main housing has a structural end face that is perpendicular to the motor shaft and on which the movable bearing seat is installed. An arc-shaped groove is provided on the structural end face. The movable bearing seat includes a cylindrical bearing seat body and at least two mounting parts disposed on the outer surface of the bearing seat body. The bearing seat body cooperates with the groove wall and the bottom of the arc-shaped groove. The mounting parts are installed on the structural end face by bolts.

[0008] Optionally, a positioning pin hole is also provided on the end face of the structure, and a structural pin hole is provided on the mounting part. The positioning pin passes through the structural pin hole and the positioning pin hole together with the arc-shaped groove to position the movable bearing seat.

[0009] The present invention also provides an electric drive assembly, including a stator assembly, a rotor assembly, a motor shaft assembly, a reducer transmission assembly, a differential assembly, and an electric drive housing as described above; the stator assembly is installed within the motor cavity; the motor shaft assembly includes an input gear and a motor shaft, the motor shaft being rotatably mounted on a first motor shaft seat and a second motor shaft seat, the input gear being located within a reduction chamber and mounted on the motor shaft, the rotor assembly being mounted on the motor shaft and located within the motor cavity; the reducer transmission assembly includes an intermediate gear and an intermediate shaft, the intermediate shaft being a gear shaft, the intermediate gear being mounted on the intermediate shaft, the intermediate gear meshing with the input gear, the intermediate shaft being mounted on a movable bearing seat and an intermediate shaft seat; the large gear of the differential assembly meshes with the intermediate shaft, and the two output shafts of the differential assembly are respectively mounted on the first shaft seat hole and the second shaft seat hole.

[0010] Optionally, the electric drive assembly further includes a first motor bearing and a second motor bearing. The first motor bearing is disposed in a first motor shaft seat, and the motor shaft is rotatably connected to the first motor bearing. The second motor bearing is disposed in a second motor shaft seat, and the motor shaft is rotatably connected to the second motor bearing.

[0011] Optionally, the first motor bearing is axially fixed by a corrugated shim.

[0012] Optionally, the second motor bearing is axially fixed by a bearing pressure plate.

[0013] The present invention also provides a new energy vehicle, including the above-mentioned electric drive assembly.

[0014] The present invention also provides an electric drive assembly assembly method for the above-mentioned electric drive assembly, comprising: assembling a stator assembly, a rotor assembly, a motor shaft assembly, and a reducer transmission assembly respectively; connecting the rotor assembly and the motor shaft assembly into one unit; installing the stator assembly into the motor cavity of the main housing; leading out the three-phase wires of the stator assembly from the reducer cavity side; installing the controller in the controller cavity of the main housing; connecting the three-phase wires of the stator assembly to the controller; installing the controller cover on the mounting window on the controller cavity; installing the rotor assembly into the motor cavity of the main housing, and installing the motor shaft of the motor shaft assembly into a first motor shaft seat; installing a movable bearing seat on the main housing; installing the reducer transmission assembly into the reducer cavity, and installing the reducer transmission assembly into the movable bearing seat; installing the reducer housing on the main housing; installing the motor shaft of the motor shaft assembly into a second motor shaft seat; and installing the intermediate shaft of the reducer transmission assembly into an intermediate shaft seat.

[0015] The present invention provides an electric drive housing, an electric drive assembly, a new energy vehicle, and an assembly method for the electric drive assembly, which have the following beneficial effects: By dividing the electric drive housing into a main housing, a reducer housing, a controller cover, and a movable bearing seat, the stator assembly, rotor assembly, motor shaft assembly, reducer transmission assembly, and differential assembly can be installed simultaneously, as well as the controller. Therefore, while fulfilling the functions of the electric drive housing, dividing the electric drive housing into four parts—the main housing, reducer housing, controller cover, and movable bearing seat—simplifies the housing design, reduces manufacturing and assembly difficulty, and thus lowers the cost of the electric drive housing. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of the electrically driven housing in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the electric drive assembly in one embodiment of the present invention; Figure 3 This is a schematic cross-sectional view of the electric drive assembly in an embodiment of the present invention; Figure 4 This is another cross-sectional view of the electric drive assembly in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the stator assembly and the main housing in the electric drive housing in an embodiment of the present invention; Figure 6 This is a schematic diagram of the main housing of the electrically driven housing in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the movable bearing housing in the electric drive housing in an embodiment of the present invention; Figure 8This is a schematic diagram of the structure of the motor shaft, rotor assembly, first motor bearing, and second motor bearing of the electric drive assembly in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 110-Main housing; 111-Motor cavity; 112-Controller cavity; 114-First motor bearing; 115-First bearing hole; 116-Structural end face; 117-Arc-shaped groove; 120-Reducer housing; 121-Reduction chamber; 122-Second bearing hole; 123-Intermediate bearing; 124-Second motor bearing; 130-Controller top cover; 140-Modible bearing seat; 141-Bearing seat body; 142-Mounting part; 150- Stator assembly; 151-Three-phase line; 160-Rotor assembly; 170-Motor shaft assembly; 171-Motor shaft; 172-Input gear; 180-Differential assembly; 190-Reducer transmission assembly; 191-Intermediate shaft; 192-Intermediate gear; 210-First motor bearing; 220-Second motor bearing; 230-Waveform gasket; 240-Bearing pressure plate; 250-Resolver assembly; 260-Resolver housing; 270-Controller. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Existing electric drive assembly housings typically house a motor cavity for mounting the motor assembly and a reducer cavity for mounting the gearbox assembly. A support partition is provided between the two cavities. The motor shaft passes through the support partition and extends into the gearbox assembly cavity. The support partition usually has a support hole for the intermediate shaft of the gearbox assembly and a support hole for the motor shaft. A cooling oil guiding structure is provided inside or on the surface of the support partition. This cooling oil guiding structure is complex, increasing the machining difficulty of the electric drive assembly housing. This invention provides an electric drive housing with a simple structure that also reduces machining difficulty.

[0025] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , Figure 1 This is an exploded structural diagram of the electrically driven housing in an embodiment of the present invention. Figure 2 This is a cross-sectional view of the electric drive assembly in one embodiment of the present invention. Figure 3This is a schematic cross-sectional view of the electric drive assembly in another embodiment of the present invention. Figure 4 This is another cross-sectional view of the electric drive assembly in an embodiment of the present invention. Figure 5 This is a schematic diagram of the stator assembly 150 and the main housing 110 in the electric drive housing in an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of the main housing 110 of the electrically driven housing in an embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of the movable bearing housing 140 in the electric drive housing according to an embodiment of the present invention. Figure 8 This is a schematic diagram of the structure of the motor shaft 171, rotor assembly 160, first motor bearing 210, and second motor bearing 220 of the electric drive assembly in this embodiment of the invention. This embodiment provides an electric drive housing, including a main housing 110, a reducer housing 120, a controller cover 130, and a movable bearing seat 140. The main housing 110 forms a controller cavity 112. The reducer housing 120 is detachably and fixedly connected to the main housing 110. The reducer housing 120 and the main housing 110 form parallel and interconnected motor cavities 111 and reduction cavities 121. The motor cavity 111 is used to install the stator assembly 150, rotor assembly 160, and motor shaft assembly 170. The reduction cavity 121 is used to install the reducer transmission assembly 190. The main housing 110 has an opening communicating with the controller cavity 112. The controller has an installation window, and the controller cover 130 is placed on the installation window. The main housing 110 is provided with a first motor shaft seat 114 for mounting the motor shaft 171. The reducer housing 120 is provided with a second motor shaft seat 124 for mounting the motor shaft 171. The reducer housing 120 is also provided with an intermediate shaft seat 123 for mounting the intermediate shaft 191 of the reducer transmission assembly 190. The movable bearing seat 140 is disposed in the reduction chamber 121 and is detachably fixedly connected to the main housing 110. The movable bearing seat 140 is used to mount the intermediate shaft 191 of the reducer transmission assembly 190. The electric drive housing omits the fixed support for supporting the reducer transmission assembly 190 and / or the motor shaft assembly 170 provided between the main housing 110 and the reducer housing 120. In this embodiment, the fixed support for supporting the reducer transmission assembly 190 and / or the motor shaft assembly 170 is eliminated from the electric drive housing. The motor cavity and reducer cavity in the existing electric drive housing are opened up. On the one hand, this can increase the flow efficiency of cooling oil in the motor cavity and reducer cavity, providing technical support for improving the cooling effect. On the other hand, it can provide technical support for reducing the design dimension of the electric drive housing in the Y direction (the direction of the motor axis).

[0026] This embodiment divides the electric drive housing into a main housing 110, a reducer housing 120, a controller cover 130, and a movable bearing seat 140. While accommodating the stator assembly 150, rotor assembly 160, motor shaft assembly 170, and reducer transmission assembly 190, it also allows for the installation of the controller 270. Therefore, while fulfilling the functions of the electric drive housing, this embodiment divides the electric drive housing into four parts: the main housing 110, the reducer housing 120, the controller cover 130, and the movable bearing seat 140. Compared to the prior art where a fixed support is provided between the main housing 110 and the reducer housing 120 to support the reducer transmission assembly 190 and / or the motor shaft assembly 170, this invention eliminates the need for a cooling oil guide structure within or on the surface of the support partition. This simplifies the housing design, reduces manufacturing and assembly difficulty, and thus lowers the cost of the electric drive housing.

[0027] The reduction chamber is also used to install the differential assembly 180. The main housing 110 is also provided with a first bearing hole 115 for mounting the first output shaft of the differential assembly 180, and the reducer housing 120 is provided with a second bearing hole 122 for mounting the second output shaft of the differential assembly 180.

[0028] In this embodiment, the main housing 110 and the reducer housing 120 are bolted together.

[0029] refer to Figure 6 The main housing 110 has a structural end face 116 formed inside, which is perpendicular to the motor shaft 171 and is used to mount the movable bearing seat 140. An arc-shaped groove 117 is formed on the structural end face 116. The movable bearing seat 140 includes a cylindrical bearing body 141 and at least two mounting portions 142 disposed on the outer surface of the bearing body 141. The bearing body 141 mates with the groove wall and bottom of the arc-shaped groove 117. The mounting portions 142 are bolted to the structural end face 116. The structural end face 116 and the arc-shaped groove 117 provide support for the movable bearing seat 140 and allow for positioning of the movable bearing seat 140. This improves the ease of installation of the movable bearing seat 140 and simplifies the structural design of the main housing 110, further reducing costs.

[0030] Preferably, the structural end face 116 is further provided with a positioning pin hole, and the mounting part 142 is provided with a structural pin hole. The positioning pin passes through the structural pin hole and the positioning pin hole together with the arc-shaped groove 117 to position the movable bearing seat 140, which can improve the convenience and accuracy of the installation of the movable bearing seat 140.

[0031] This embodiment also provides an electric drive assembly, including a stator assembly 150, a rotor assembly 160, a motor shaft assembly 170, a reducer transmission assembly 190, a differential assembly 180, and the electric drive housing described in the above embodiment; the stator assembly 150 is installed in the motor cavity 111; the motor shaft assembly 170 includes an input gear 172 and a motor shaft 171, the motor shaft 171 is rotatably mounted on a first motor shaft seat 114 and a second motor shaft seat 124, the input gear 172 is located in the reduction cavity 121 and mounted on the motor shaft 171, and the rotor assembly 160 is mounted in the electric drive housing. The gearbox is mounted on shaft 171 and located within motor cavity 111; the reducer transmission assembly 190 includes an intermediate gear 192 and an intermediate shaft 191, the intermediate shaft 191 being a gear shaft, the intermediate gear 192 being mounted on the intermediate shaft 191 and meshing with the input gear 172, the intermediate shaft 191 being mounted on the movable bearing seat 140 and the intermediate shaft seat 123; the large gear of the differential assembly 180 meshes with the intermediate shaft 191, and the two output shafts of the differential assembly 180 are respectively mounted on the first shaft seat hole 115 and the second shaft seat hole 122. In this embodiment, the motor shaft 171 of the motor and the input shaft of the input gearbox in the prior art are combined into one, supported by only two sets of bearings. Compared with the three-bearing split shaft scheme, the structure is more stable, the NVH performance of the electric drive assembly is better during operation, and the dimensions of the electric drive assembly along the axial direction of the motor shaft 171 can be simplified, the volume of the electric drive assembly can be reduced, the power density of the electric drive assembly can be increased, thereby improving the competitiveness of the electric drive assembly.

[0032] Preferably, the motor shaft 171 and the input gear 172 are integrally formed, that is, the motor shaft 171 and the input gear 172 form a gear shaft. This can further simplify the dimensions of the electric drive assembly along the axial direction of the motor shaft 171, reduce the volume of the electric drive assembly, increase the power density of the electric drive assembly, and thus improve the competitiveness of the electric drive assembly.

[0033] In this embodiment, the electric drive assembly further includes a first motor bearing 210 and a second motor bearing 220. The first motor bearing 210 is disposed in the first motor bearing seat 114, and the motor shaft 171 is rotatably connected to the first motor bearing 210. The second motor bearing 220 is disposed in the second motor bearing seat 124, and the motor shaft 171 is rotatably connected to the second motor bearing 220.

[0034] Preferably, the first motor bearing 210 is axially fixed by a corrugated shim 230. The corrugated shim 230 provides axial support and preload for the first motor bearing 210. This further reduces the dimensions of the electric drive assembly along the axial direction of the motor shaft 171, reduces the volume of the electric drive assembly, increases the power density of the electric drive assembly, and thus enhances the competitiveness of the electric drive assembly.

[0035] Preferably, the second motor bearing 220 is axially fixed by a bearing plate 240. This further reduces the dimensions of the electric drive assembly along the axial direction of the motor shaft 171, reduces the volume of the electric drive assembly, increases the power density of the electric drive assembly, and thus enhances the competitiveness of the electric drive assembly.

[0036] Preferably, the three-phase lines 151 of the stator assembly 150 are led out from the reduction chamber 121 side and connected to the controller 270 via an adapter copper busbar on the reduction chamber 121 side. Thus, by placing the adapter copper busbar inside the reduction chamber 121, the axial dimensions of the electric drive assembly along the motor shaft 171 can be reduced, thus reducing the volume of the electric drive assembly, increasing its power density, and thereby enhancing its competitiveness. Furthermore, it reduces the need for wiring covers, further reducing the manufacturing and processing difficulty of the electric drive assembly, and lowering its cost.

[0037] Preferably, the electric drive assembly includes a resolver assembly 250 and a resolver housing 260. The main housing 110 has a resolver hole for connecting to the resolver assembly 250. The resolver housing 260 covers the resolver assembly 250 and the resolver hole, and the resolver housing 260 is detachably and fixedly connected to the main housing 110, for example, by bolts.

[0038] This embodiment also provides a new energy vehicle, including the electric drive assembly described in the above embodiment.

[0039] This embodiment also provides a method for assembling the above-mentioned electric drive assembly, including: The stator assembly 150, rotor assembly 160, motor shaft assembly 170 and reducer transmission assembly 190 are assembled separately. The rotor assembly 160 and the motor shaft assembly 170 are connected as one unit; The stator assembly 150 is installed into the motor cavity 111 of the main housing 110; Lead out the three-phase line 151 of the stator assembly 150 from the side of the reduction chamber 121, install the controller 270 in the controller chamber 112 of the main housing 110, and connect the three-phase line 151 of the stator assembly 150 to the controller 270. The controller cover 130 is installed on the mounting window on the controller cavity 112; The rotor assembly 160 is installed into the motor cavity 111 of the main housing 110, and the motor shaft 171 of the motor shaft assembly 170 is installed in the first motor shaft seat 114. Install the movable bearing housing 140 in the first motor shaft housing 114 on the main housing 110, install the reducer transmission assembly 190 in the reduction chamber 121, and install the reducer transmission assembly 190 on the movable bearing housing 140. The reducer housing 120 is mounted on the main housing 110, and the motor shaft 171 of the motor shaft assembly 170 is mounted in the second motor shaft seat 124, and the intermediate shaft 191 of the reducer transmission assembly 190 is mounted in the intermediate shaft seat 123.

[0040] The electric drive assembly assembly method further includes installing the differential assembly 180 into the reduction chamber 121, and installing the second output shaft of the differential assembly 180 onto the second bearing hole 122, and installing the first output shaft of the differential assembly 180 onto the first bearing hole 115.

[0041] Installing the movable bearing seat 140 into the first motor shaft seat 114 on the main housing 110 specifically includes first fitting the movable bearing seat 140 with the arc-shaped groove 117, and then positioning the movable bearing seat 140 together with the arc-shaped groove 117 by passing the positioning pin through the structural pin hole and the positioning pin hole.

[0042] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An electrically driven housing, characterized in that, The device includes a main housing, a reducer housing, a controller cover, and a movable bearing housing. The main housing forms a controller cavity. The reducer housing is detachably and fixedly connected to the main housing. The reducer housing and the main housing form a parallel and interconnected motor cavity and a reduction cavity. The motor cavity is used to install the stator assembly, rotor assembly, and motor shaft assembly. The reduction cavity is used to install the reducer transmission assembly. The main housing has an installation window communicating with the controller cavity. The controller cover is placed over the installation window. The main housing has a first motor shaft seat for installing the motor shaft. The reducer housing has a second motor shaft seat for installing the motor shaft. The reducer housing also has an intermediate shaft seat for installing the intermediate shaft of the reducer transmission assembly. The movable bearing housing is disposed in the reduction cavity and is detachably and fixedly connected to the main housing. The movable bearing housing is used for installing the intermediate shaft of the reducer transmission assembly. The electric drive housing omits the fixed support between the main housing and the reducer housing for supporting the reducer transmission assembly and / or the motor shaft assembly.

2. The electrically driven housing as described in claim 1, characterized in that, The reduction chamber is also used to install the differential assembly. The main housing is also provided with a first bearing hole for mounting the first output shaft of the differential assembly, and the reducer housing is provided with a second bearing hole for mounting the second output shaft of the differential assembly.

3. The electrically driven housing as described in claim 1, characterized in that, The main housing has a structural end face that is perpendicular to the motor shaft and on which the movable bearing seat is installed. An arc-shaped groove is provided on the structural end face. The movable bearing seat includes a cylindrical bearing seat body and at least two mounting parts disposed on the outer surface of the bearing seat body. The bearing seat body cooperates with the groove wall and the bottom of the arc-shaped groove. The mounting parts are installed on the structural end face by bolts.

4. The electrically driven housing as described in claim 3, characterized in that, The end face of the structure is also provided with a positioning pin hole, and the mounting part is provided with a structural pin hole. The positioning pin passes through the structural pin hole and the positioning pin hole together with the arc-shaped groove to position the movable bearing seat.

5. An electric drive assembly, characterized in that, The device includes a stator assembly, a rotor assembly, a motor shaft assembly, a reducer transmission assembly, a differential assembly, and an electric drive housing as described in any one of claims 1-4; the stator assembly is installed within the motor cavity; the motor shaft assembly includes an input gear and a motor shaft, the motor shaft being rotatably mounted on a first motor shaft seat and a second motor shaft seat, the input gear being located within a reduction chamber and mounted on the motor shaft, the rotor assembly being mounted on the motor shaft and located within the motor cavity; the reducer transmission assembly includes an intermediate gear and an intermediate shaft, the intermediate shaft being a gear shaft, the intermediate gear being mounted on the intermediate shaft, the intermediate gear meshing with the input gear, the intermediate shaft being mounted on a movable bearing seat and an intermediate shaft seat; the large gear of the differential assembly meshes with the intermediate shaft, and the two output shafts of the differential assembly are respectively mounted on the first shaft seat hole and the second shaft seat hole.

6. The electric drive assembly as described in claim 5, characterized in that, The electric drive assembly also includes a first motor bearing and a second motor bearing. The first motor bearing is disposed in a first motor shaft seat, and the motor shaft is rotatably connected to the first motor bearing. The second motor bearing is disposed in a second motor shaft seat, and the motor shaft is rotatably connected to the second motor bearing.

7. The electric drive assembly as described in claim 6, characterized in that, The first motor bearing is axially fixed by a corrugated shim.

8. The electric drive assembly as described in claim 6, characterized in that, The second motor bearing is axially fixed by a bearing pressure plate.

9. A new energy vehicle, characterized in that, Includes the electric drive assembly as described in any one of claims 5-8.

10. A method for assembling an electric drive assembly as described in any one of claims 5-8, characterized in that, include: The stator assembly, rotor assembly, motor shaft assembly, and reducer transmission assembly are assembled separately. The rotor assembly and motor shaft assembly are connected as one unit; The stator assembly is installed into the motor cavity of the main housing; Lead the three-phase wires of the stator assembly out from the deceleration chamber side, install the controller in the controller chamber of the main housing, and connect the three-phase wires of the stator assembly to the controller. Install the controller cover onto the mounting window on the controller cavity; The rotor assembly is installed into the motor cavity of the main housing, and the motor shaft of the motor shaft assembly is installed in the first motor shaft seat; Install the movable bearing housing on the main housing, install the reducer transmission assembly into the reduction chamber, and install the reducer transmission assembly on the movable bearing housing. The reducer housing is mounted on the main housing, and the motor shaft of the motor shaft assembly is mounted in the second motor shaft seat, and the intermediate shaft of the reducer transmission assembly is mounted in the intermediate shaft seat.

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