Electric drive housing assembly and electric drive system

Abstract

The present invention discloses an electric drive housing assembly, including a reducer housing, a motor housing and an electric control housing, wherein the motor housing is a hollow cylindrical shape, the motor housing and the electric control housing are integrated, the two motor housings are symmetrically arranged on opposite sides of the reducer housing, and the two electric control housings are respectively arranged on the outer sides of the two motor housings in the axial direction; the electric control housing includes a cover and a shell body, the shell body and the motor housing are integrally formed, and the cover and the shell body are detachably connected; the reducer housing includes a main shell and two cover plates, one side of the cover plate is connected to the shell body, and the other side of the cover plate is connected to the main shell, and the two cover plates are respectively covered on the openings on opposite sides of the main shell, and a first installation cavity and a second installation cavity are symmetrically arranged in the main shell. The present invention also discloses an electric drive system. The present invention is conducive to realizing a flat design, and reduces the space occupied in the front-back direction and the up-down direction of the whole vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to an electric drive housing assembly and an electric drive system. Background Art

[0002] The electric drive system housing of new energy vehicles is an important part of the electric drive assembly. It not only carries key components such as motors, controllers and reducers, but also affects the heat dissipation, protection and overall performance of the entire system. With the development of technology, the housing of the electric drive system tends to be integrated. For example, the "three-in-one" electric drive system integrates the motor, controller and reducer, shares some housings, reduces transmission components, thereby reducing system weight, reducing system size, and improving power density.

[0003] The existing electric drive system housing lacks a flat design and occupies a large space overall. Therefore, it is necessary to design an electric drive housing assembly and an electric drive system that occupies a small space and has a compact structure. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an electric drive housing assembly and an electric drive system that occupy a small space and have a compact structure.

[0005] The technical solution of the present invention provides an electric drive housing assembly, comprising a reducer housing, a motor housing and an electric control housing, wherein the motor housing is a hollow cylindrical shape, the motor housing and the electric control housing are integrated, the two motor housings are symmetrically arranged on opposite sides of the reducer housing, and the two electric control housings are respectively arranged on the outer sides of the two motor housings in the axial direction;

[0006] The electric control housing comprises a cover and a housing body, the housing body and the motor housing are integrally formed, and the cover and the housing body are detachably connected;

[0007] The reducer housing includes a main housing and two cover plates, one side of the cover plate is connected to the housing body, and the other side of the cover plate is connected to the main housing, and the two cover plates are respectively covered on the openings on opposite sides of the main housing, and a first installation cavity and a second installation cavity are symmetrically arranged in the main housing.

[0008] Furthermore, the shell body includes a partition, which divides the inner cavity of the shell body into a main cavity and a secondary cavity, the main cavity is located between the cover and the partition, and the secondary cavity is located on the side facing the motor housing. The secondary cavity is connected to the interior of the motor housing, and a plug hole is opened on the partition.

[0009] Furthermore, the electric control housing further comprises a rear cover plate, the side of the sub-cavity opposite to the cover is provided with a rear opening, and the rear cover plate is used to close the rear opening.

[0010] Further, the shell body includes a bottom plate and a side panel, and the bottom plate is directly connected to one side of the motor housing;

[0011] An electrically controlled cooling circuit for cooling the power module is provided in the shell body, and the electrically controlled cooling circuit includes a liquid inlet pipe, a cooling groove and a liquid outlet pipe. The cooling groove is opened on the bottom plate, and the liquid inlet pipe extends from the outside of the side panel into the inside of the bottom plate and is connected with the cooling groove, and the liquid outlet pipe is connected to the inside of the motor housing through the inside of the bottom plate from the other side of the cooling groove.

[0012] Furthermore, a motor cooling circuit is provided in the motor housing, the motor cooling circuit is arranged inside the circumferential surface of the motor housing, and the electric control cooling circuit is communicated with the motor cooling circuit;

[0013] The motor cooling circuit comprises a liquid inlet and a liquid outlet, wherein the liquid inlet is directly connected to the electronically controlled cooling circuit, and the liquid outlet extends from the motor housing.

[0014] Furthermore, a first input bearing installation groove is provided on the inner wall of the main housing, a first oil guide hole is opened on the first input bearing installation groove, and a plurality of radially distributed first ribs are provided outside the first input bearing installation groove;

[0015] The inner wall of the cover plate is provided with a second input bearing installation groove corresponding to the first input bearing installation groove, and the second input bearing installation groove is provided with a plurality of second convex ribs distributed radially outside.

[0016] Furthermore, a first output bearing installation groove is provided on the inner wall of the main housing, a second oil guide hole is opened on the installation groove of the first output bearing, and a plurality of third convex ribs distributed radially are provided outside the first output bearing installation groove;

[0017] The inner wall of the cover plate is provided with a second output bearing installation groove corresponding to the first output bearing installation groove, and the second output bearing installation groove is provided with a plurality of fourth ribs distributed radially outside.

[0018] Furthermore, a first intermediate bearing mounting groove is provided on the inner wall of the main housing;

[0019] The inner wall of the cover plate is provided with a second intermediate bearing installation groove corresponding to the first intermediate bearing installation groove, and the second intermediate bearing installation groove is provided with a plurality of fifth ribs distributed radially outside.

[0020] Furthermore, a plurality of mounting positions are provided below the first intermediate bearing mounting groove on the inner wall of the main housing, and the mounting positions are used for mounting an oil pump.

[0021] The present invention also provides an electric drive system, comprising a motor, a motor controller and a reducer, and also comprising an electric drive housing assembly as described in any of the above items, wherein the motor is installed in the motor housing, the motor controller is installed in the electric control housing, and the reducer is installed in the reducer housing.

[0022] After adopting the above technical solution, the following beneficial effects are achieved:

[0023] In the present invention, since the two motor housings are symmetrically arranged on opposite sides of the reducer housing, and the two electric control housings are arranged outside the two motor housings in the axial direction, the entire electric drive housing assembly is arranged along the axial direction of the motor housing, which is conducive to realizing a flat design and reducing the space occupied in the front-to-back direction and the up-and-down direction of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0025] Figure 1 is a three-dimensional diagram of an electric drive housing assembly in one embodiment of the present invention;

[0026] Figure 2 is an exploded view of an electric drive housing assembly in one embodiment of the present invention;

[0027] Figure 3 is an exploded view of a motor housing and an electronic control housing in one embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of a motor housing and an electric control housing without covers in one embodiment of the present invention;

[0029] Figure 5 is an exploded view of a motor housing, an electronic control housing and a power module in one embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of a motor housing, an electronic control housing and a resolver stator in one embodiment of the present invention;

[0031] Figure 7 is a schematic diagram of an electric control cooling circuit and a motor cooling circuit in one embodiment of the present invention;

[0032] Figure 8 is a schematic diagram of a reducer housing in one embodiment of the present invention;

[0033] Fig. 9 is an exploded view of a reducer housing in one embodiment of the present invention;

[0034] Fig.10is a schematic diagram of a main housing in one embodiment of the present invention;

[0035] Fig.11 is a front view of a main housing in one embodiment of the present invention;

[0036] Fig.12 Schematic diagram of the inner side of the cover plate in one embodiment of the present invention.

[0037] Reference table of reference numerals:

[0038] The electric control housing 1 includes a cover 11, a housing body 12, a rear cover plate 13, a bottom plate 121, a side panel 122, a rear opening 123, a partition plate 124, a plug-in hole 125, a main cavity 12A, and a secondary cavity 12B.

[0039] Motor housing 2;

[0040] Electronically controlled cooling circuit 3: liquid inlet pipe 31, cooling tank 32, liquid outlet pipe 33, liquid drain pipe 34;

[0041] Motor cooling circuit 4: liquid inlet 41, liquid outlet 42;

[0042] Reducer housing 5: main housing 51, cover plate 52, honeycomb structure 510, first input bearing mounting groove 511, first output bearing mounting groove 512, first intermediate bearing mounting groove 513, first convex rib 514, third convex rib 515, mounting position 516, first oil guide hole 517, second oil guide hole 518, second input bearing mounting groove 521, second output bearing mounting groove 522, second intermediate bearing mounting groove 523, second convex rib 524, fourth convex rib 525, fifth convex rib 526;

[0043] Power module 10: heat sink 101;

[0044] Rotary stator 20. DETAILED DESCRIPTION

[0045] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0046] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the invention.

[0047] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0048] In some embodiments of the present invention, the electric drive housing assembly includes a reducer housing 5, a motor housing 2 and an electric control housing 1, the motor housing 2 is a hollow cylinder, the motor housing 2 and the electric control housing 1 are integrated, the two motor housings 2 are symmetrically arranged on opposite sides of the reducer housing 5, and the two electric control housings 1 are respectively arranged on the outer sides of the two motor housings 2 in the axial direction;

[0049] The electric control housing 1 comprises a cover 11 and a housing body 12. The housing body 12 is integrally formed with the motor housing 2, and the cover 11 and the housing body 12 are detachably connected.

[0050] The reducer housing 5 includes a main housing 51 and two cover plates 52. One side of the cover plate 52 is connected to the housing body 12, and the other side of the cover plate 52 is connected to the main housing 51. The two cover plates 52 are respectively covered on the openings on opposite sides of the main housing 51. The main housing 51 is symmetrically arranged with a first installation cavity and a second installation cavity.

[0051] Specifically, Figure 1 As shown, the reducer housing 5 is located in the center, the two motor housings 2 are located on the left and right sides of the reducer housing 5, and the two electric control housings 1 are located outside the motor housing 2. The central axis of the motor housing 2 corresponds to the central axis of the input shaft system of the reducer housing 5. Therefore, the reducer housing 5, the motor housing 2 and the electric control housing 1 are arranged in a row along the central axis of the motor housing 2, realizing the flat design of the electric drive housing assembly, which can reduce the dimensions in the front-to-back direction and the up-and-down direction, and the arrangement of the internal motor, motor controller and reducer is more reasonable and compact after being arranged along the axial direction.

[0052] like Figure 2 As shown, the electric control housing 1 and the motor housing 2 are integrated, and two sets of the electric control housing 1 and the motor housing 2 are symmetrically arranged on the left and right sides of the reducer housing 5. After the electric control housing 1 and the motor housing 2 are housed together, it is convenient to arrange the internal wiring harness of the motor and the motor controller and design the cooling circuit, and can reduce the design of external pipelines.

[0053] like Figure 3As shown, the electric control housing 1 includes a cover 11 and a housing body 12, and the cover 11 and the housing body 12 can be detachably connected by multiple bolts or screws. The housing body 12 is used to install the motor controller, and the motor housing 2 is used to install the motor. The housing body 12 and the motor housing 2 are integrally formed, and the motor and the motor controller are separated into two cavities by the bottom surface of the housing body 12, and are arranged separately.

[0054] like Figure 8 As shown, the reducer housing 5 is a whole, and two groups of reducers are integrated inside the reducer housing 5, so that the overall structure is compact and occupies a small space.

[0055] like Fig. 9 As shown, the reducer housing 5 is symmetrically arranged with a first installation cavity and a second installation cavity, the left and right sides of the main housing 51 are open, and two cover plates 52 are respectively covered on the left and right sides of the main housing 51 to close the first installation cavity and the second installation cavity. The two sets of reducers are respectively installed in the first installation cavity and the second installation cavity.

[0056] like Figure 2 As shown, one side of the cover plate 52 is directly connected to the motor housing 2 , and the other side of the cover plate 52 is connected to the main housing 51 .

[0057] In this embodiment, two sets of reducers are integrated into a reducer housing 5, so that two wheels can be controlled separately, and the arrangement is reasonable, the structure is compact, and the space occupied is small.

[0058] Furthermore, the shell body 12 includes a partition 124, which divides the inner cavity of the shell body 12 into a main cavity 12A and a secondary cavity 12B. The main cavity 12A is located between the cover 11 and the partition 124, and the secondary cavity 12B is located on the side facing the motor housing 2. The secondary cavity 12B is connected to the interior of the motor housing 2, and a plug hole 125 is opened on the partition 124.

[0059] Specifically, Figure 3 and Figure 5 As shown, the shell body 12 includes a partition 124, which divides the inner cavity of the shell body 12 into a main cavity 12A and a sub-cavity 12B, wherein the main cavity 12A is located between the cover 11 and the partition 124, and the main cavity 12A is used to install most of the structure of the motor controller.

[0060] like Figure 6As shown, the sub-cavity 12B is located on the side facing the motor housing 2, and the sub-cavity 12B is connected to the inside of the motor housing 2, and two plug holes 125 are provided on the partition 124. One of the plug holes 125 is provided for the installation of the copper bar connected to the electric control motor. After the flexible cable of the motor stator passes through the motor housing 2 and enters the sub-cavity 12B, it is connected to the copper bar connected to the electric control motor. The other plug hole 125 is provided for the installation of the connection terminal, which is used to connect with the cable of the resolver stator 20. The cable of the resolver 20 also passes through the motor housing 2 and enters the sub-cavity 12B and is installed with the connection terminal.

[0061] Therefore, by setting the internal structure of the electric control housing 1 and the motor housing 2, the electrical connection between the motor and the motor controller is achieved, and the entire structure is more compact, the layout is reasonable, and the space occupied is smaller.

[0062] Furthermore, if Figure 5 As shown, the electric control housing 1 further includes a rear cover plate 13 , and a rear opening 123 is formed on the side of the auxiliary cavity 12B opposite to the cover 11 , that is, on the side facing the motor housing 2 , and the rear cover plate 13 is used to close the rear opening 123 .

[0063] The arrangement of the sub-cavity 12B and the rear opening 123 facilitates the electrical connection between the motor and the motor controller, and also facilitates the later maintenance. After the wiring harness and the copper bar are connected, the rear cover plate 13 is connected to the rear opening 123 by bolts.

[0064] Furthermore, if Figure 3-4 As shown, the housing body 12 includes a bottom plate 121 and a side panel 122 , and the bottom plate 121 is directly connected to one side of the motor housing 2 ;

[0065] like Figure 7 As shown, the shell body 12 is provided with an electronically controlled cooling circuit 3 for cooling the power module. The electronically controlled cooling circuit 3 includes a liquid inlet pipe 31, a cooling groove 32 and a liquid outlet pipe 33. The cooling groove 32 is opened on the bottom plate 121. The liquid inlet pipe 31 extends from the outside of the side panel 122 into the inside of the bottom plate 121 and is connected with the cooling groove 32. The liquid outlet pipe 33 is connected to the inside of the motor housing 2 through the inside of the bottom plate 121 from the other side of the cooling groove 32.

[0066] Specifically, Figure 3 As shown, one end of the liquid inlet pipe 31 of the electronically controlled cooling circuit 3 is located on the outer side of the side panel 122 for connecting with an external coolant source, and the other end passes through the interior of the bottom plate 121 and connects with the cooling groove 32; the cooling groove 32 is a groove opened on the inner side surface of the bottom plate 121, and two liquid holes are opened on the cooling groove 32, one liquid hole is connected with the liquid inlet pipe 31, and the other liquid hole is connected with the liquid outlet pipe 33.

[0067] like Figure 7As shown, the liquid outlet pipe 33 is connected from the other side of the cooling groove 32 through the interior of the bottom plate 121 to the motor cooling circuit 4 inside the motor housing 2.

[0068] During cooling, the coolant enters the cooling tank 32 through the liquid inlet pipe 31, the cooling tank 32 cools the power module 10, and then flows from the cooling tank 32 into the liquid outlet pipe 33, and finally flows from the liquid outlet pipe 33 into the motor cooling circuit 4 to continue cooling the motor.

[0069] like Figure 5 As shown, a plurality of protruding heat sinks 101 are provided on one side of the power module 10 facing the cooling groove 32, and the heat sinks 101 are inserted into the cooling groove 32, and then the power module 10 is sealed with the edge of the cooling groove 32 by a sealing ring. In this way, when the coolant flows into the cooling groove 32, the coolant contacts the heat sink 101 and takes away the heat of the heat sink 101. Since the sealing ring reduces the gap between the cooling groove 32 and the power module 10 and seals it, the coolant will not flow into the hollow cavity of the electric control housing 1, and will not affect the motor controller.

[0070] This embodiment realizes that the motor and the motor controller share a cooling system, effectively utilizes the coolant, optimizes the layout of the cooling system, and reduces the cost.

[0071] Furthermore, if Figure 4 and Figure 7 As shown, the electronically controlled cooling circuit 3 also includes a drain pipe 34 , which is disposed inside the bottom plate 121 , one end of the drain pipe 34 is connected to the cooling tank 32 and to the outlet pipe 33 , and the other end of the drain pipe 34 extends from the outer wall of the side panel 122 .

[0072] Specifically, Figure 4 As shown, one end of the drain pipe 34 is connected to the liquid hole at the bottom of the cooling groove 32, and the other end extends from the outer wall of the side panel 122 to discharge excess coolant.

[0073] like Figure 7 As shown, the middle section of the liquid discharge pipe 34 is connected to one end of the liquid outlet pipe 33 , and the other end of the liquid outlet pipe 33 is connected to the liquid inlet 41 of the motor cooling circuit 4 .

[0074] The coolant first flows from the cooling tank 32 into the drain pipe 34, and then flows from the drain pipe 34 into the outlet pipe 33. The other end of the drain pipe 34 can be blocked or a valve can be installed. When cooling, the valve is closed; when it is necessary to discharge excess coolant, the valve is opened.

[0075] It should be noted that Figure 7The portion between the liquid inlet pipe 31 and the liquid outlet pipe 34 is not the cooling groove 32, but the shape of the coolant flowing into the cooling groove 32. The coolant is in the cooling groove 32 and surrounds the plurality of protruding heat sinks 101 for cooling.

[0076] Furthermore, a motor cooling circuit 4 is provided in the motor housing 2, and the motor cooling circuit 4 is arranged inside the circumferential surface of the motor housing 2, and the electric control cooling circuit 3 is connected to the motor cooling circuit 4;

[0077] The motor cooling circuit 4 includes a liquid inlet 41 and a liquid outlet 42 . The liquid inlet 41 is directly connected to the electronically controlled cooling circuit 3 , and the liquid outlet 42 extends from the motor housing 2 .

[0078] Specifically, Figure 7 As shown, the motor cooling circuit 4 is a spiral cooling channel arranged inside the motor housing 2. The spiral cooling channel goes around the circumference of the motor housing 2 and can cool the motor in all directions. The liquid inlet 41 is directly connected to the liquid outlet pipe 33, and the liquid outlet 42 extends out of the motor housing 2 to be connected to the external cooling circulation pipeline. After the cooling circulation pipeline cools the coolant again, it flows into the cooling device again from the liquid inlet pipe 31.

[0079] Preferably, if Figure 8 As shown, a honeycomb structure 510 is provided on the outer surface of one side of the main shell 51. The honeycomb structure 510 can enhance the rigidity and strength of the shell and improve the NVH performance.

[0080] Furthermore, if Figure 10-12 As shown, a first input bearing installation groove 511 is provided on the inner wall of the main housing 51, a first oil guide hole 517 is opened on the first input bearing installation groove 511, and a plurality of radially distributed first convex ribs 514 are provided outside the first input bearing installation groove 511;

[0081] The inner wall of the cover plate 52 is provided with a second input bearing installation groove 521 corresponding to the first input bearing installation groove 511 , and the second input bearing installation groove 521 is provided with a plurality of radially distributed second convex ribs 524 outside.

[0082] Specifically, the reducer includes an input shaft system, an intermediate shaft system and an output shaft system. The input shaft system is connected to the motor, the input shaft system transmits the power of the motor to the intermediate shaft system, the intermediate shaft system transmits the power to the output shaft system, and finally the power is output from the output shaft system and connected to the external wheel axle.

[0083] After the cover plate 52 is buckled with the main housing 51, the two input bearings of the input shaft system are respectively installed in the first input bearing installation groove 511 and the second input bearing installation groove 521. Two first oil guide holes 517 are provided above the first input bearing installation groove 511. A plurality of radially distributed first ribs 514 are provided around the first input bearing installation groove 511. A plurality of radially distributed second ribs 524 are provided outside the second input bearing installation groove 521. The first ribs 514 and the second ribs 524 are provided correspondingly. An oil groove is formed between adjacent first ribs 514, and an oil groove is also formed between adjacent second ribs 524. When the oil flows into the first ribs 514 and the second ribs 524, the oil gathers in the oil groove, and then slowly flows into the input bearing from the first oil guide hole 517 for cooling, thereby improving the cooling effect.

[0084] Furthermore, if Figure 10-12 As shown, a first output bearing mounting groove 512 is further provided on the inner wall of the main housing 51, a second oil guide hole 518 is opened on the mounting groove of the first output bearing, and a plurality of third convex ribs 515 distributed radially are provided outside the first output bearing mounting groove 512;

[0085] The inner wall of the cover plate 52 is provided with a second output bearing installation groove 522 corresponding to the first output bearing installation groove 512 , and a plurality of radially distributed fourth convex ribs 525 are provided outside the second output bearing installation groove 522 .

[0086] Similarly, when the oil is stirred by the gears of the output shaft system into the oil groove between the third rib 515 and the fourth rib 525 above, the oil gathers in the oil groove and then flows from the oil groove into the output bearing through the second oil guide hole 518, thereby continuously cooling the output bearing.

[0087] Furthermore, if Figure 10-12 As shown, a first intermediate bearing mounting groove 513 is provided on the inner wall of the main housing 51;

[0088] The inner wall of the cover plate 52 is provided with a second intermediate bearing installation groove 523 corresponding to the first intermediate bearing installation groove 513, and the second intermediate bearing installation groove 523 is provided with a plurality of radially distributed fifth ribs 526 outside, which mainly play the role of increasing the structural strength of the cover plate 52 and the second intermediate bearing installation groove 523.

[0089] Furthermore, if Fig.10 As shown, a plurality of mounting positions 516 are provided below the first intermediate bearing mounting groove 513 on the inner wall of the main housing 51, and the mounting positions 516 are used to install an oil pump. There are three mounting positions 516, which are used to be fixedly connected to the oil pump by bolts or screws, and the oil pump is used to transport oil to the input shaft system and the intermediate shaft system to cool the input shaft system and the intermediate shaft system.

[0090] The present invention also provides an electric drive system, including a motor, a motor controller and a reducer, and also includes the electric drive housing assembly in any of the above embodiments, the motor is installed in the motor housing 2, the motor controller is installed in the electric control housing 1, and the reducer is installed in the reducer housing 5.

[0091] In the present invention, the motor housing and the electronic control housing are integrated into one, and the internal structure of the housing is arranged to facilitate the electrical connection inside the motor and the motor controller. The layout of the entire electronic control motor assembly is compact, the integration is high, and the space occupied is smaller. The electronic control housing and the motor housing are arranged coaxially, which can reduce the dimensions in the X and Z directions and realize the flattening and miniaturization design of the electric drive system. In addition, two sets of cooling devices are symmetrically arranged to cool a set of motors and electronic controls respectively, thereby improving the cooling efficiency of the dual motors. The electronic control cooling circuit and the motor cooling circuit are respectively arranged inside the electronic control housing and the motor housing, and the coolant flows directly from the inside of the electronic control housing into the motor housing. There is no need to arrange external cooling pipelines, which reduces space occupation, reduces costs, and also improves cooling efficiency. In addition, the two sets of reducers are integrated into a reducer housing, so that the two wheels can be controlled separately, and the layout is reasonable, the structure is compact, and the space occupied is small.

[0092] The above description is only the principle and preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several other modifications can be made based on the principle of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. An electric drive housing assembly, comprising a reducer housing, a motor housing and an electronic control housing, characterized in that: The motor housing is a hollow cylinder, the motor housing and the electric control housing are integrated, the two motor housings are symmetrically arranged on opposite sides of the reducer housing, the two electric control housings are respectively arranged on the outside of the two motor housings in the axial direction, the reducer housing is used to install the reducer, the reducer includes an input shaft system, an intermediate shaft system and an output shaft system, and the central axis of the motor housing corresponds to the central axis of the input shaft system in the reducer housing; The electric control housing comprises a cover and a housing body, the housing body and the motor housing are integrally formed, the housing body comprises a bottom plate and a side panel, the bottom plate is directly connected to one side of the motor housing, the cover is arranged on the side panel, the housing body is used to install the motor controller, the motor housing is used to install the motor, the motor and the motor controller are separated into two cavities by the bottom plate and arranged separately, and the cover is detachably connected to the housing body; The shell body also includes a partition, which is located in the same plane as the bottom plate and is integrally formed. The partition divides the inner cavity of the shell body into a main cavity and a secondary cavity. The main cavity is located between the cover and the partition, and the main cavity is used to install a motor controller. The secondary cavity extends from the partition along the axial direction toward one side of the output shaft system in the reducer housing and is located on the side of the motor housing. The cross-sectional area of ​​the main cavity is larger than the cross-sectional area of ​​the motor housing. The secondary cavity is located at the angle between the motor housing and the main cavity, and the secondary cavity is directly connected to the interior of the motor housing along the radial direction of the motor housing. Two plug holes are provided on the partition, and the two plug holes are used to install the motor stator and the resolver stator cables of the motor respectively. The motor stator and the resolver stator cables enter the secondary cavity from the motor housing along the radial direction; The electric control housing further comprises a rear cover plate, the side of the secondary cavity opposite to the cover is provided with a rear opening, and the rear cover plate is used to close the rear opening to form the secondary cavity into a closed cavity that only connects the main cavity and the inside of the motor housing; The reducer housing includes a main housing and two cover plates, one side of the cover plate is connected to the housing body, and the other side of the cover plate is connected to the main housing, and the two cover plates are respectively covered on the openings on opposite sides of the main housing, and a first installation cavity and a second installation cavity are symmetrically arranged in the main housing.

2. The electric drive housing assembly according to claim 1, characterized in that: An electrically controlled cooling circuit for cooling the power module is provided in the shell body, and the electrically controlled cooling circuit includes a liquid inlet pipe, a cooling groove and a liquid outlet pipe. The cooling groove is opened on the bottom plate, and the liquid inlet pipe extends from the outside of the side panel into the inside of the bottom plate and is connected with the cooling groove, and the liquid outlet pipe is connected to the inside of the motor housing through the inside of the bottom plate from the other side of the cooling groove.

3. The electric drive housing assembly according to claim 2, characterized in that: A motor cooling circuit is provided in the motor housing, the motor cooling circuit is arranged inside the circumferential surface of the motor housing, and the electric control cooling circuit is communicated with the motor cooling circuit; The motor cooling circuit comprises a liquid inlet and a liquid outlet, wherein the liquid inlet is directly connected to the electronically controlled cooling circuit, and the liquid outlet extends from the motor housing.

4. The electric drive housing assembly according to claim 1, characterized in that: A first input bearing installation groove is provided on the inner wall of the main housing, a first oil guide hole is opened on the first input bearing installation groove, and a plurality of radially distributed first ribs are provided outside the first input bearing installation groove; The inner wall of the cover plate is provided with a second input bearing installation groove corresponding to the first input bearing installation groove, and the second input bearing installation groove is provided with a plurality of second convex ribs distributed radially outside.

5. The electric drive housing assembly according to claim 4, characterized in that: A first output bearing installation groove is also provided on the inner wall of the main housing, a second oil guide hole is opened on the installation groove of the first output bearing, and a plurality of third convex ribs distributed radially are provided outside the first output bearing installation groove; The inner wall of the cover plate is provided with a second output bearing installation groove corresponding to the first output bearing installation groove, and the second output bearing installation groove is provided with a plurality of fourth ribs distributed radially outside.

6. The electric drive housing assembly according to claim 4, characterized in that: A first intermediate bearing mounting groove is provided on the inner wall of the main housing; The inner wall of the cover plate is provided with a second intermediate bearing installation groove corresponding to the first intermediate bearing installation groove, and the second intermediate bearing installation groove is provided with a plurality of fifth ribs distributed radially outside.

7. The electric drive housing assembly according to claim 6, characterized in that: A plurality of mounting positions are provided below the first intermediate bearing mounting groove on the inner wall of the main housing, and the mounting positions are used for mounting an oil pump.

8. An electric drive system, comprising a motor, a motor controller and a reducer, characterized in that: It also includes the electric drive housing assembly according to any one of claims 1 to 7, wherein the motor is installed in the motor housing, the motor controller is installed in the electric control housing, and the reducer is installed in the reducer housing.

Images