Bearing chamber supporting plate, speed reducer rear shell, electric drive assembly and vehicle

Abstract

The utility model relates to a bearing chamber supporting plate, a speed reducer rear shell, an electric drive assembly and a vehicle, the bearing chamber supporting plate comprises a plate body, the plate body is provided with a bearing mounting hole allowing a bearing to penetrate through, the plate body is provided with a first oil channel allowing lubricating oil to flow, and the first oil channel extends in the radial direction of the plate body. According to the bearing chamber supporting plate, the first oil channel allowing the lubricating oil to flow through is formed in the plate body, so that the lubricating oil can be conveyed and can reach the position needing a bearing, heat dissipation of the bearing position is achieved, and an outer oil pipe does not need to be independently arranged for conveying the lubricating oil; the problem that the manufacturing cost is high due to the arrangement of the outer oil pipe can be solved, the weight of the formed speed reducer or electric drive assembly is reduced, and the requirement for light weight is met.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric drive heat dissipation, and in particular, to a bearing chamber support plate, a reducer rear housing, an electric drive assembly and a vehicle. Background Art

[0002] In the related art, the heat dissipation of the reducer bearing is mainly achieved by setting up oil pipes to transport lubricating oil to the reducer bearing. However, such a setting will result in a higher manufacturing cost of the reducer and a larger weight of the reducer. Utility Model Content

[0003] The purpose of the present disclosure is to provide a bearing chamber support plate, a reducer rear housing, an electric drive assembly and a vehicle to solve the problems in the above-mentioned related technologies.

[0004] In order to achieve the above-mentioned purpose, one aspect of the present disclosure provides a bearing chamber support plate, including a plate body, the plate body having a bearing mounting hole for the bearing to pass through, the plate body having a first oil channel for the flow of lubricating oil, and the first oil channel extending in the radial direction of the plate body.

[0005] Optionally, a first oil outlet hole is formed in the hole wall of the bearing mounting hole, and the first oil outlet hole is connected to the first oil channel.

[0006] Optionally, the first oil passage includes a first guide section and a second guide section, the first guide section is connected to the second guide section, and the first oil outlet is connected to an end of the first guide section away from the second guide section.

[0007] Optionally, the first guide section is inclined in an oblique downward direction, and the first oil outlet is located below the first guide section.

[0008] Optionally, in the axial direction of the plate body, the first oil outlet hole is close to the opening of the bearing mounting hole.

[0009] Optionally, a first oil inlet and a second oil outlet are provided on the plate body, the first oil inlet and the second oil outlet are both connected to the first oil channel, the first oil inlet is used to connect to the oil supply end, and the second oil outlet is used to guide the lubricating oil out of the first oil channel.

[0010] A second aspect of the present disclosure further provides a reducer rear housing, comprising a rear housing and the above-mentioned bearing chamber support plate;

[0011] The bearing chamber support plate is connected to the rear housing;

[0012] The rear housing has a first bearing mounting position and a second bearing mounting position, the second bearing mounting position corresponds to the bearing mounting hole of the bearing chamber support plate, the rear housing is provided with a second oil passage, the second oil passage is connected to the first oil passage, and the second oil passage is used to transport lubricating oil to the first bearing mounting position and / or the second bearing mounting position.

[0013] Optionally, the second oil passage includes a third guide section and a fourth guide section, one end of the third guide section is connected to the first oil passage, the other end of the third guide section is connected to one end of the fourth guide section, and the other end of the fourth guide section is connected to the first bearing mounting position and / or the second bearing mounting position.

[0014] Optionally, the third guide section extends along the axial direction of the rear shell, and the fourth guide section extends along the radial direction of the rear shell.

[0015] Optionally, the first bearing mounting position is provided with a first oil inlet groove and a first oil drain groove, the first bearing mounting position is provided with a second oil inlet groove and a second oil drain groove, the first oil inlet groove is provided with a third oil outlet hole extending along the axis direction of the rear housing, and the second oil passage is connected to the third oil outlet hole;

[0016] Among them, the first bearing mounting position is located above the second bearing mounting position, the first oil drain groove is used to guide the lubricating oil into the rear housing, the second oil inlet groove is used to guide the lubricating oil in the rear housing to the second bearing mounting position, and the second oil inlet groove is located above the second oil drain groove.

[0017] Optionally, the rear housing is provided with a receiving groove, the receiving groove is used to install an electronic oil pump, and the first oil channel is connected to an output end of the electronic oil pump.

[0018] Optionally, an opening is formed on a groove wall of the accommodating groove, an output end of the electronic oil pump faces the opening, and the opening faces the first oil inlet of the first oil channel.

[0019] A third aspect of the present disclosure further provides an electric drive assembly, comprising a motor, an electronic oil pump and the above-mentioned reducer rear housing;

[0020] The electronic oil pump is connected to the reducer rear housing, the reducer rear housing is connected to the motor, and the first oil passage of the reducer rear housing is in communication with the output end of the electronic oil pump.

[0021] Optionally, the electric drive assembly further includes an oil guide pipe, one end of which is connected to an output end of the electronic oil pump, and the other end of which is used to transport lubricating oil to the gears.

[0022] The fourth aspect of the present disclosure also provides a vehicle, comprising the above-mentioned reducer rear housing, or the above-mentioned electric drive assembly.

[0023] The above technical solution can transport the lubricating oil by opening a first oil passage for the lubricating oil to flow through in the plate body, so that the lubricating oil can reach the required bearing part and realize heat dissipation of the bearing part. In this way, there is no need to set up a separate external oil pipe for transporting the lubricating oil, which can solve the problem of high manufacturing cost caused by the setting of the external oil pipe. At the same time, without setting up the external oil pipe, the number of parts can be reduced, so that the weight of the reducer or electric drive assembly is reduced, which is conducive to meeting the demand for lightweight.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 is a schematic diagram of the internal structure of a bearing chamber support plate according to an embodiment of the present disclosure;

[0027] Figure 2 is a structural schematic diagram of a bearing chamber support plate according to an embodiment of the present disclosure;

[0028] Figure 3 It is a structural schematic diagram of the matching relationship between the bearing chamber support plate and the rear housing in one embodiment of the present disclosure;

[0029] Figure 4 is a cross-sectional view of a rear housing of an embodiment of the present disclosure from one perspective;

[0030] Figure 5 is a cross-sectional view of a rear housing of an embodiment of the present disclosure from another perspective;

[0031] Figure 6 It is a structural schematic diagram of the setting position of the third oil outlet hole in one embodiment of the present disclosure.

[0032] Description of Reference Numerals

[0033] 1. plate body, 11. bearing mounting hole, 12. first oil outlet hole, 13. first oil inlet, 14. second oil outlet hole;

[0034] 2. first oil channel, 21. first flow guide section, 22. second flow guide section;

[0035] 3. rear housing, 31. first bearing mounting position, 32. second bearing mounting position, 33. first oil inlet groove, 34. first oil drain groove, 35. second oil inlet groove, 36. second oil drain groove, 37. third oil outlet hole, 38. receiving groove, 39. opening;

[0036] 4. second oil channel, 41. third flow guide section, 42. fourth flow guide section;

[0037] 5. Electronic oil pump. DETAILED DESCRIPTION

[0038] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0039] In the present disclosure, unless otherwise stated, directional words such as "upper, lower, left, right" are usually defined by the direction of the drawing, and "inner" and "outer" refer to the inside and outside of the relevant parts. In addition, the terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0041] One of the necessary conditions to ensure the normal driving of vehicles on the road is the normal operation of the reducer system, and the normal operation of the reducer system is inseparable from the normal working state of the bearing components. During driving, the bearings will not fail due to high temperature, which requires lubrication and cooling of the bearing parts to reduce the negative state of the bearings during high-speed operation. If the single-stage reducer of the electric drive assembly is improperly lubricated and cooled, it will not only cause bearing wear, but also cause abnormal noise, wear or failure of the transmission components, affecting driving comfort and driving safety.

[0042] In the related art, the heat dissipation of the reducer bearing is mainly achieved by setting up oil pipes to transport lubricating oil to the reducer bearing. However, such a setting will result in a higher manufacturing cost of the reducer and a larger weight of the reducer.

[0043] For this reason, Figure 1-Figure 6As shown, one aspect of the present disclosure provides a bearing chamber support plate, including a plate body 1, the plate body 1 is provided with a bearing mounting hole 11 for the bearing to pass through, the plate body 1 is provided with a first oil channel 2 for the flow of lubricating oil, and the first oil channel 2 extends in the radial direction of the plate body 1.

[0044] The plate body 1 is used to support the bearing and assist in fixing the bearing. The first oil passage 2 is located in the plate body 1 .

[0045] In the above technical solution, by providing the first oil passage 2 for the lubricating oil to flow through in the plate body 1, the lubricating oil can be transported so that the lubricating oil can reach the required bearing part to achieve heat dissipation of the bearing part. In this way, there is no need to separately set up an external oil pipe for the lubricating oil transportation, which can solve the problem of high manufacturing cost caused by the setting of the external oil pipe. At the same time, without setting up the external oil pipe, the number of parts can be reduced, so that the weight of the reducer or electric drive assembly is reduced, which is conducive to meeting the demand for lightweight.

[0046] In order to improve the heat dissipation effect of the bearing, optionally, in one embodiment of the present disclosure, a first oil outlet hole 12 is provided in the hole wall of the bearing mounting hole 11, and the first oil outlet hole 12 is connected to the first oil channel 2. By providing the first oil outlet hole 12 in the hole wall of the bearing mounting hole 11, the lubricating oil can flow out from the first oil outlet hole 12, and the bearing chamber passes through the bearing mounting hole 11, so the lubricating oil flowing out can be directly transported to the bearing, achieving directional and targeted delivery of the lubricating oil, and improving the heat dissipation effect of the bearing. It can be understood that when the lubricating oil flows in the first oil channel 2, it can flow out from the first oil outlet hole 12.

[0047] Optionally, in one embodiment of the present disclosure, the first oil channel 2 includes a first guide section 21 and a second guide section 22 , the first guide section 21 and the second guide section 22 are connected, and the first oil outlet 12 is connected to one end of the first guide section 21 away from the second guide section 22 .

[0048] The first guide section 21 is used to guide the lubricating oil to the first oil outlet 12, that is, the lubricating oil can be divided between the first guide section 21 and the second guide section 22, a part of the lubricating oil flows to the first oil outlet 12 through the first guide section 21, and flows out from the first oil outlet 12, and another part of the lubricating oil flows along the second guide section 22 and flows to other positions. In some examples, the second guide section 22 serves as a main lubricating oil channel, the first guide section 21 serves as a branch channel, one end of the first guide section 21 is connected to the second guide section 22, and the first guide section 21 and the second guide section 22 are arranged at an angle.

[0049] Optionally, in one embodiment of the present disclosure, the first guide section 21 is inclined in an oblique downward direction, and the first oil outlet 12 is located below the first guide section 21. By such an arrangement, after the lubricating oil flows from the second guide section 22 into the first guide section 21, it can flow toward the first oil outlet 12 under the action of its own gravity, which can reduce the demand for the driving force for the flow of the lubricating oil. It should be noted that here the first guide section 21 can be located on one side of the bearing mounting hole 11, and the bearing chamber support plate is vertically arranged.

[0050] Optionally, in one embodiment of the present disclosure, in the axial direction of the plate body 1, the first oil outlet hole 12 is close to the orifice of the bearing mounting hole 11. By such a configuration, the lubricating oil can flow directly to the inner ring of the bearing, thereby improving the heat dissipation effect of the bearing. In some examples, the first oil outlet hole 12 is located at the orifice of the rear housing 3 of the reducer rear housing near the bearing mounting hole 11, so that the lubricating oil discharged from the first oil outlet hole 12 will not be swung along with the rotation of the bearing, but will flow directly to the inner ring of the bearing, thereby achieving heat dissipation of the inner ring of the bearing.

[0051] Optionally, in one embodiment of the present disclosure, a first oil inlet 13 and a second oil outlet 14 are provided on the plate body 1, and the first oil inlet 13 and the second oil outlet 14 are both connected to the first oil channel 2, the first oil inlet 13 is used to connect to the oil supply end, and the second oil outlet 14 is used to guide the lubricating oil out of the first oil channel 2.

[0052] Among them, the first oil inlet 13 is used to guide the lubricating oil into the first oil channel 2, that is, the oil discharged from the output end of the electronic oil pump 5 can enter the first oil channel 2 through the first oil inlet 13. The second oil outlet 14 is used to transport the lubricating oil in the first oil channel 2 to other locations to be cooled. In some examples, the first oil inlet 13 is connected to one end of the second guide section 22, and the second oil outlet 14 is connected to the other end of the second guide section 22.

[0053] Optionally, the second guide section 22 can be set as a through hole that penetrates the plate body 1, that is, from one side wall of the plate body 1 to the other side wall, wherein the hole on one side wall can be used as the first oil inlet 13, and the hole on the other side wall can be blocked by a plug, and a second oil outlet hole 14 is opened on the plate surface of the plate body 1 to guide the lubricating oil to a required position.

[0054] Optionally, in an embodiment of the present disclosure, the plate body 1 is further provided with a positioning pin hole and a connection hole for connecting with the rear housing of the reducer, and a weight-reducing groove may also be provided on the plate body 1.

[0055] The second aspect of the present disclosure further provides a reducer rear housing, comprising a rear housing 3 and the above-mentioned bearing chamber support plate.

[0056] The bearing chamber support plate is connected to the rear housing 3 .

[0057] The rear housing 3 has a first bearing mounting position 31 and a second bearing mounting position 32. The second bearing mounting position 32 corresponds to the bearing mounting hole 11 of the bearing chamber support plate. The rear housing 3 is provided with a second oil passage 4. The second oil passage 4 is connected to the first oil passage 2. The second oil passage 4 is used to transport lubricating oil to the first bearing mounting position 31 and / or the second bearing mounting position 32.

[0058] Among them, the rear shell 3 is provided with positioning pins and connecting bolts, the bearing chamber support plate can be positioned through the cooperation between the positioning pin hole and the positioning pin, and the rear shell 3 and the bearing chamber support plate can be connected and fixed by the cooperation between the connecting bolts and the connecting holes.

[0059] Among them, the second oil passage 4 is arranged in the rear housing 3 to guide the lubricating oil to the first bearing installation position 31 and / or the second bearing installation position 32, so that the bearing installed in the first bearing installation position 31 and / or the second bearing installation position 32 can be cooled. It should be noted that the lubricating oil in the first oil passage 2 flows into the second oil passage 4 and is transported through the second oil passage 4, and the second oil passage 4 is connected to the second oil outlet 14 mentioned above.

[0060] Optionally, in one embodiment of the present disclosure, the second oil passage 4 includes a third guide section 41 and a fourth guide section 42, one end of the third guide section 41 is connected to the first oil passage 2, the other end of the third guide section 41 is connected to one end of the fourth guide section 42, and the other end of the fourth guide section 42 is connected to the first bearing mounting position 31 and / or the second bearing mounting position 32.

[0061] Among them, the third guide section 41 is used to transport the lubricating oil to the fourth guide section 42. Both the third guide section 41 and the fourth guide section 42 can be formed by through holes opened in the rear housing 3. The exposed opening of the third guide section 41 is connected to the second oil outlet hole 14 to realize the delivery of the lubricating oil, and the fourth guide section 42 is used to directly transport the lubricating oil to the first bearing mounting position 31 and / or the second bearing mounting position 32. Optionally, in some examples, the fourth guide section 42 is connected to the second bearing mounting position 32. Of course, in other examples, the fourth guide section 42 can also be connected to the first bearing mounting position 31, and can also be connected to the first bearing mounting position 31 and the second bearing mounting position 32 at the same time, without too much restriction here.

[0062] Optionally, in one embodiment of the present disclosure, the third guide section 41 extends along the axial direction of the rear housing 3, and the fourth guide section 42 extends along the radial direction of the rear housing 3. By such an arrangement, the lubricating oil is transported along the axial direction through the third guide section 41, so that the lubricating oil flows out in a manner of overflowing from the inner wall surface of the rear housing 3 as much as possible, which can ensure the heat dissipation effect of the bearing, and the fourth guide section 42 extends along the radial direction, and the lubricating oil can be transported to a suitable position as needed.

[0063] Optionally, in one embodiment of the present disclosure, the first bearing mounting position 31 is provided with a first oil inlet groove 33 and a first oil drain groove 34, the first bearing mounting position 31 is provided with a second oil inlet groove 35 and a second oil drain groove 36, the first oil inlet groove 33 is provided with a third oil outlet hole 37 extending along the axial direction of the rear housing 3, and the second oil passage 4 is connected to the third oil outlet hole 37.

[0064] Among them, the first bearing mounting position 31 is located above the second bearing mounting position 32, the first oil drain groove 34 is used to guide the lubricating oil into the rear housing 3, and the second oil inlet groove 35 is used to guide the lubricating oil in the rear housing 3 to the second bearing mounting position 32, and the second oil inlet groove 35 is located above the second oil drain groove 36.

[0065] Among them, the first oil inlet groove 33 is used to guide the lubricating oil into the first bearing mounting position 31, and the first oil drain groove 34 is used to overflow the excess lubricating oil. In some examples, the first oil drain groove 34 is located above the first oil inlet groove 33, the third oil outlet hole 37 is located at the bottom of the first oil inlet groove 33, and the third oil outlet hole 37 is connected to the fourth guide section 42 mentioned above, so that the lubricating oil overflows from the third oil outlet hole 37 to the first oil inlet groove 33. In this way, the lubricating oil can enter the first bearing mounting position 31 and dissipate heat for the bearing installed in the first bearing mounting position 31. Optionally, an oil blocking convex portion is provided at one end of the first oil inlet groove 33 away from the first bearing mounting position 31, and the oil blocking convex portion is used to prevent the lubricating oil from flowing in a direction away from the first bearing mounting position 31.

[0066] Among them, the second bearing mounting position 32 is below the first bearing mounting position 31, so that the lubricating oil flowing out of the first oil drain groove 34 can enter the second bearing mounting position 32 through the second oil inlet groove 35, thereby realizing heat dissipation of the bearing installed in the second bearing mounting position 32, and there is no need to set up structures such as oil pipes.

[0067] Optionally, in one embodiment of the present disclosure, the rear housing 3 is provided with a receiving groove 38, and the receiving groove 38 is used to install the electronic oil pump 5, and the first oil channel 2 is connected to the output end of the electronic oil pump 5. The electronic oil pump 5 is accommodated by the receiving groove 38, which facilitates the installation of the electronic oil pump 5.

[0068] In some examples, the accommodating groove 38 is opened at the bottom of the inner wall of the rear housing 3, so that the electronic oil pump 5 is arranged on the inner wall side of the rear housing 3, which can improve space utilization without affecting the size of the entire electric drive assembly.

[0069] In some examples, a cylinder convex outwardly along the axial direction is formed at the bottom of the inner wall of the rear housing 3, and the cylinder constitutes a receiving groove 38. The electronic oil pump 5 is arranged in the cylinder. At the same time, a filter element is provided on the electronic oil pump 5 to filter the lubricating oil.

[0070] Optionally, in an embodiment of the present disclosure, an opening 39 is formed on the wall of the accommodating groove 38 , the output end of the electronic oil pump 5 faces the opening 39 , and the opening 39 faces the first oil inlet 13 of the first oil channel 2 .

[0071] Among them, the opening 39 is used for the electronic oil pump 5 to transport lubricating oil outward, that is, the lubricating oil discharged from the output end of the electronic oil pump 5 flows out of the receiving groove 38 through the opening 39, and then flows to the bearing to achieve heat dissipation. In the existing technology, the opening 39 is generally facing downward, and the area of ​​the opening 39 is generally large, that is, it is facing the lubricating oil. As the lubricating oil level rises, the lubricating oil is rolled up under the stirring of the bearing rotation. This method will cause the electronic oil pump 5 to suck air. For this reason, by facing the first oil inlet 13 of the first oil channel 2 with the opening 39, combined with the design of setting the first oil channel 2 on the bearing chamber support plate in the present disclosure for directional delivery of lubricating oil, the lubricating oil output by the electronic oil pump 5 is directly delivered to the first oil channel 2 instead of being delivered downward. In this way, the size and area of ​​the opening 39 can be reduced, and the air suction phenomenon caused by the high-speed operation of the electronic oil pump 5 can be reduced.

[0072] The third aspect of the present disclosure further provides an electric drive assembly, including a motor, an electronic oil pump 5 and the above-mentioned reducer rear housing.

[0073] The electronic oil pump 5 is connected to the rear housing of the reducer, the rear housing of the reducer is connected to the motor, and the first oil passage 2 of the rear housing of the reducer is communicated with the output end of the electronic oil pump 5 .

[0074] The electronic oil pump 5 is connected to the receiving groove 38 of the reducer rear shell, and the reducer rear shell is connected to the motor housing by bolts. It should be noted that a plurality of bearings are installed in the reducer rear shell, and the specific mutual connection relationship and position of the bearings belong to the prior art and will not be described in detail here. The output shaft of the motor and the output shaft of the reducer form a coaxial structure.

[0075] Optionally, in an embodiment of the present disclosure, the electric drive assembly further includes an oil guide pipe, one end of which is connected to the output end of the electronic oil pump 5, and the other end of the oil guide pipe is used to transport lubricating oil to the gear.

[0076] Among them, one end of the oil guide pipe is set as a second oil inlet, and the lubricating oil output by the electronic oil pump 5 can enter the oil guide pipe through the second oil inlet and be transported to the gear through the oil guide pipe. As the gear rotates, it swings to achieve splashing lubrication and heat dissipation.

[0077] It can be understood that the electric drive assembly adopts two methods to achieve heat dissipation of the reducer bearings. The first method is to directional transport of lubricating oil through the first oil channel 2 on the bearing chamber support plate and the second oil channel 4 on the rear housing 3, so that the lubricating oil is directional transported to each bearing to achieve heat dissipation. The second method is to transport the lubricating oil to the gears through the oil guide pipe, and produce a splashing effect as the gears rotate, thereby dissipating the heat of the components and bearings in the reducer, thereby greatly improving the heat dissipation performance of the entire reducer and bearing parts.

[0078] In the electric drive assembly disclosed in the present invention, there are two flow paths for lubricating oil. The first flow path is the electronic oil pump 5, the first oil inlet 13, the first oil channel 2, the second oil channel 4, the first oil inlet groove 33, the first bearing mounting position 31, the first oil drain groove 34, the second oil inlet groove 35, the second bearing mounting position 32, the second oil drain groove 36, and the electronic oil pump 5. The second flow path is the electronic oil pump 5, the second oil inlet, the oil guide pipe, the gear, and the electronic oil pump 5.

[0079] The fourth aspect of the present disclosure also provides a vehicle, comprising the above-mentioned reducer rear housing, or the above-mentioned electric drive assembly.

[0080] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0081] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0082] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A bearing chamber support plate, characterized in that: The invention comprises a plate body, wherein the plate body is provided with a bearing mounting hole for the bearing to pass through, and the plate body is provided with a first oil passage for the flow of lubricating oil, wherein the first oil passage extends in the radial direction of the plate body.

2. The bearing chamber support plate according to claim 1, characterized in that: A first oil outlet hole is formed in the hole wall of the bearing mounting hole, and the first oil outlet hole is communicated with the first oil passage.

3. The bearing chamber support plate according to claim 2, characterized in that: The first oil passage includes a first guide section and a second guide section, the first guide section and the second guide section are connected, and the first oil outlet is connected to an end of the first guide section away from the second guide section.

4. The bearing chamber support plate according to claim 3, characterized in that: The first guide section is inclined in an oblique downward direction, and the first oil outlet is located below the first guide section.

5. The bearing chamber support plate according to claim 2, characterized in that: In the axial direction of the plate body, the first oil outlet hole is close to the opening of the bearing mounting hole.

6. The bearing chamber support plate according to any one of claims 1 to 5, characterized in that: The plate body is provided with a first oil inlet and a second oil outlet, both of which are connected to the first oil passage, the first oil inlet is used to be connected to the oil supply end, and the second oil outlet is used to guide the lubricating oil out of the first oil passage.

7. A reducer rear housing, characterized in that: comprising a rear housing and a bearing chamber support plate as claimed in any one of claims 1 to 6; The bearing chamber support plate is connected to the rear housing; The rear housing has a first bearing mounting position and a second bearing mounting position, the second bearing mounting position corresponds to the bearing mounting hole of the bearing chamber support plate, the rear housing is provided with a second oil passage, the second oil passage is connected to the first oil passage, and the second oil passage is used to transport lubricating oil to the first bearing mounting position and / or the second bearing mounting position.

8. The reducer rear housing according to claim 7, characterized in that: The second oil passage includes a third guide section and a fourth guide section, one end of the third guide section is connected to the first oil passage, the other end of the third guide section is connected to one end of the fourth guide section, and the other end of the fourth guide section is connected to the first bearing mounting position and / or the second bearing mounting position.

9. The reducer rear housing according to claim 8, characterized in that: The third guide section extends along the axial direction of the rear shell, and the fourth guide section extends along the radial direction of the rear shell.

10. The reducer rear housing according to claim 7, characterized in that: The first bearing mounting position is provided with a first oil inlet groove and a first oil drain groove, the first bearing mounting position is provided with a second oil inlet groove and a second oil drain groove, the first oil inlet groove is provided with a third oil outlet hole extending along the axis direction of the rear housing, and the second oil passage is connected to the third oil outlet hole; Among them, the first bearing mounting position is located above the second bearing mounting position, the first oil drain groove is used to guide the lubricating oil into the rear housing, the second oil inlet groove is used to guide the lubricating oil in the rear housing to the second bearing mounting position, and the second oil inlet groove is located above the second oil drain groove.

11. The reducer rear housing according to claim 7, characterized in that: The rear housing is provided with a receiving groove, the receiving groove is used to install an electronic oil pump, and the first oil channel is connected to the output end of the electronic oil pump.

12. The reducer rear housing according to claim 11, characterized in that: An opening is formed in the wall of the containing groove, the output end of the electronic oil pump faces the opening, and the opening faces the first oil inlet of the first oil channel.

13. An electric drive assembly, characterized in that: It comprises a motor, an electronic oil pump and a reducer rear housing as claimed in any one of claims 7 to 12; The electronic oil pump is connected to the reducer rear housing, the reducer rear housing is connected to the motor, and the first oil passage of the reducer rear housing is in communication with the output end of the electronic oil pump.

14. The electric drive assembly according to claim 13, characterized in that: The electric drive assembly also includes an oil guide pipe, one end of which is connected to the output end of the electronic oil pump, and the other end of the oil guide pipe is used to transport lubricating oil to the gear.

15. A vehicle, characterized in that: It comprises the reducer rear housing as described in any one of claims 7 to 12, or the electric drive assembly as described in claim 13 or 14.

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