A support assembly for an electric drive axle lubrication system

Abstract

The present application discloses a support assembly of an electric drive axle lubrication system. Among them, an oil pump is installed on the reducer housing; an oil supply distribution base is located on the reducer housing, a filter is installed on the oil supply distribution base, and a distribution oil circuit is arranged in the oil supply distribution base, and the distribution oil circuit includes a first oil hole and an oil hole group; the first oil hole connects the outlet of the oil pump and the inlet of the filter; the oil hole group includes at least two oil outlet holes, and the inlets of at least two oil outlet holes are connected to the outlet of the filter, and the outlets of at least two oil outlet holes are used to transport lubricating oil to at least one of the inside and outside of the reducer housing; a throttle hole is arranged in the oil outlet hole, and the aperture of the throttle hole is positively correlated with the amount of oil required to pass through the oil outlet hole. The support assembly of the electric drive axle lubrication system provided by the present application can realize flexible oil supply of the reduction system, meet the oil supply requirements of multiple parts, and reduce the space occupied by the oil supply system.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle engine lubrication systems, and in particular to a support assembly of an electric drive axle lubrication system. Background Art

[0002] The drive axle is the middle part of the vehicle, generally including dual-motor drive axles and single-motor drive axles. Dual-motor drive axles generally include the following two structural schemes: dual-motor distributed drive and dual-motor centralized drive. The dual-motor centralized drive power is finally aggregated to the differential output. In addition to the normal drive part, the single-motor drive axle also comes with a power take-off branch, which is output by the oil pump to provide power for other needs of the vehicle.

[0003] Both the dual-motor drive axle and the single-motor drive axle include a drive motor, a reduction mechanism, a drive axle and a wheel end. The drive motor can be an asynchronous motor, a synchronous motor and an excitation motor. The gear position of the reduction mechanism can be single gear, two gears and multiple gears, with or without disengagement, one-stage, two-stage or three-stage reduction; the structure of the reduction mechanism can be parallel shaft gear reduction, steel belt reduction, planetary gear reduction, etc. The drive axle wheel end can be with or without wheel end reduction.

[0004] The gear bearings of the reduction mechanism need to be lubricated with lubricating oil when working. Splash lubrication is generally used, and special designs will use active forced lubrication or other better lubrication effects. When active forced lubrication is used, the oil supply system must be matched. The oil supply system generally includes coarse filter, oil pump, filter, oil cooler, etc. Ideal active lubrication requires lubrication of each bearing, each pair of gears and differentials, and because the entire system is relatively complex and there are many gears and bearings, the flexibility of the lubrication oil supply system needs to be increased. In addition, reasonable design is also required to reduce the space required for the oil supply system and realize the compact development of the oil supply system. Summary of the invention

[0005] The purpose of the present application is to provide a support assembly for an electric drive axle lubrication system, so as to realize flexible oil supply to the reduction system, meet the oil supply requirements of multiple parts, and reduce the space occupied by the oil supply system.

[0006] The technical solution of the present application provides a support assembly of an electric drive axle lubrication system, comprising: a reducer housing, on which an oil pump is installed; an oil supply distribution base, located on the reducer housing, on which a filter is installed, and an oil distribution circuit is provided in the oil supply distribution base, and the oil distribution circuit comprises a first oil hole and an oil hole group; the first oil hole connects the outlet of the oil pump with the inlet of the filter; the oil hole group comprises at least two oil outlet holes, and the inlets of at least two of the oil outlet holes are connected to the outlet of the filter, and the outlets of at least two oil outlet holes are used to transport lubricating oil to at least one of the inside and outside of the reducer housing; a throttling hole is provided in the oil outlet hole, and the aperture of the throttling hole is positively correlated with the amount of oil required to pass through the oil outlet hole.

[0007] Optionally, a mounting seat is provided on the oil supply distribution base, the mounting seat is provided with a mounting surface, and the mounting surface is provided with an oil hole connected to at least two of the oil outlet holes; the filter is connected to the mounting surface, and the outlet of the filter is connected to the oil hole.

[0008] Optionally, a heat exchanger is also installed on the oil supply distribution base, and the distribution oil circuit also includes a second oil hole, which connects the outlet of the filter with the inlet of the heat exchanger, and the inlets of at least two of the oil outlet holes are connected to the outlet of the heat exchanger.

[0009] Optionally, the oil supply distribution base includes a bottom plate, the bottom plate includes a top surface, an oppositely arranged liquid inlet side surface and an installation side surface; the filter is connected to the installation side surface, the first oil hole is opened in the bottom plate and connected between the liquid inlet side surface and the installation side surface; the heat exchanger is installed on the top surface of the bottom plate, the second oil hole is opened in the bottom plate and connected between the filter and the heat exchanger.

[0010] Optionally, the oil supply distribution base includes a mounting plate, the mounting side is located on the mounting plate, and a first oil hole and a second oil hole are provided on the mounting plate; the first oil hole connects the first oil hole with the filter, and the second oil hole connects the second oil hole with the heat exchanger.

[0011] Optionally, the oil hole group also includes an oil outlet main pipe located in the base plate, the oil outlet main pipe is connected to the outlet of the heat exchanger, the inlets of at least two of the oil outlet holes are connected to the oil outlet main pipe, and the outlets of at least two of the oil outlet holes are opened on the outer wall of the reducer housing.

[0012] Optionally, a water supply channel and a water outlet channel are further provided in the bottom plate, the water supply channel is connected to the water inlet of the heat exchanger, and the water outlet channel is connected to the water outlet of the heat exchanger.

[0013] Optionally, the outlet of the oil pump is communicated with the first oil hole via an oil inlet pipe located outside the reducer housing or a channel opened in the reducer housing.

[0014] Optionally, a tee is installed on the base plate, the inlet of the tee is connected to the outlet of the oil outlet, and the two outlets of the tee are respectively connected to two delivery pipelines outside the reducer housing; or one outlet is connected to the delivery pipeline outside the reducer housing, and the other is connected to the oil circuit inside the reducer housing; or the two outlets are respectively connected to the two oil circuits inside the reducer housing.

[0015] Optionally, a mounting hole is provided on the heat exchanger, a middle hole is provided on the bottom plate, and a positioning hole is provided on the reducer housing. The mounting hole, the middle hole and the positioning hole are aligned and connected through a mounting rod.

[0016] The above technical solution has the following beneficial effects:

[0017] The support assembly of the electric drive axle lubrication system provided by the present application can significantly reduce the space occupied by the oil supply system by integrally installing the oil pump and the oil supply distribution base with an integrated filter on the reducer housing, which is conducive to the compactness and space miniaturization of the oil supply system. The filter cooperates with the distribution oil circuit opened in the oil supply distribution base to filter the lubricating oil at the outlet of the oil pump through the filter and then distribute it through the oil hole group. At least two oil outlets in the oil hole group can transport the lubricating oil to at least two parts of the motor for lubrication, such as gears, bearings, differentials, etc. The specific position can also be adjusted according to demand, which is highly flexible. In addition, by setting a throttle hole in the oil outlet hole and adjusting the size of the throttle hole according to the oil flow demand of the oil outlet hole, the lubricating oil supply amount of the part that needs oil supply can be flexibly adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a support assembly of an electric drive axle lubrication system in one embodiment of the present application.

[0019] Figure 2 This is a structural schematic diagram of a filter installed on an oil supply distribution base in one embodiment of the present application.

[0020] Figure 3 This is an exploded view of the oil supply distribution base and the filter in one embodiment of the present application.

[0021] Figure 4 This is an exploded view of the oil supply distribution base, filter and heat exchanger in one embodiment of the present application.

[0022] Figure 5This is a layout diagram of the oil hole group in the oil supply distribution base in one embodiment of the present application.

[0023] Figure 6 It is a cross-sectional view of a throttling hole provided in an oil outlet hole in one embodiment of the present application.

[0024] Figure 7 This is an oil supply distribution diagram of the electric drive axle lubrication system in one embodiment of the present application.

[0025] Figure 8 This is an oil supply distribution diagram of an electric drive axle lubrication system in another embodiment of the present application.

[0026] Reference Numbers

[0027] 1- reducer housing, 10- oil pump, 100- oil inlet pipe.

[0028] 2-oil supply distribution base, 20-mounting seat, 200-mounting surface, 201-oil hole, 21-bottom plate, 210-top surface, 211-liquid inlet side, 212-mounting side, 213-water supply channel, 22-mounting plate, 220-reinforcement rib, 221-protrusion, 23-tee pipe.

[0029] 3-Filter.

[0030] 4- Heat exchanger.

[0031] 5-distribution oil circuit, 50-first oil hole, 51-oil hole group, 510-oil outlet hole, 511-throttling hole, 512-oil outlet main pipe, 52-second oil hole. DETAILED DESCRIPTION

[0032] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0033] 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.

[0034] 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.

[0035] like Figure 1As shown, the present application provides a support assembly of an electric drive axle lubrication system, including: a reducer housing 1 and an oil supply distribution base 2.

[0036] Please refer to Figure 1 An oil pump 10 is installed on the reducer housing 1.

[0037] Please refer to Figures 2 to 4 The oil supply distribution base 2 is located on the reducer housing 1 , a filter 3 is installed on the oil supply distribution base 2 , an oil distribution circuit 5 is arranged inside the oil supply distribution base 2 , and the oil distribution circuit 5 includes a first oil hole 50 and an oil hole group 51 .

[0038] like Figure 3 and Figure 4 As shown, the inlet of the first oil hole 50 is opened on the outer wall of the oil supply distribution base 2, connecting the outlet of the oil pump 10 and the inlet of the filter 3. Figure 3 to Figure 4 The direction of the arrow is the flow direction of the lubricating oil.

[0039] The oil hole group 51 includes at least two oil outlet holes 510, and the inlets of at least two of the oil outlet holes 510 are connected to the outlet of the filter 3. The outlets of at least two of the oil outlet holes 510 are used to transport lubricating oil to at least one of the inside and outside of the reducer housing 1.

[0040] At least two oil outlet holes 510 can deliver lubricating oil to the components in the reducer housing 1 through the distribution of the oil supply distribution base. Figures 7 and 8 As shown, the pipes connected to the outlets of the oil outlet holes 510 are respectively connected to different components in the reducer housing 1. At least two oil outlet holes 510 can also deliver lubricating oil to components outside the reducer housing 1. At least two oil outlet holes 510 can also deliver lubricating oil to components inside the reducer housing 1 and components outside the reducer housing 1 at the same time.

[0041] Please refer to Figure 3 The outlets of the multiple oil outlet holes 510 can be flexibly arranged on the side, top surface 210 and bottom surface of the oil supply distribution base 2, and the outlets of the various oil outlet holes 510 do not interfere with each other, thereby meeting the oil supply needs of multiple parts.

[0042] In an optional embodiment, the number of the oil outlet holes 510 can be set to two, three, four, five, etc.

[0043] In an optional embodiment, the number of the oil outlet holes 510 is four, and the outlets of the four oil outlet holes 510 are respectively connected to the bearing, the gear, the differential and the wheel end through delivery pipelines.

[0044] Please refer to Figures 5 and 6, a throttle hole 511 is provided inside the oil outlet hole 510, and the aperture of the throttle hole 511 is positively correlated with the amount of oil required to pass through the oil outlet hole 510. That is, the amount of oil passing through and the aperture of the throttle hole 511 are positively correlated in a straight line or a curve, and the larger the amount of oil passing through the oil outlet hole 510, the larger the aperture of the internal throttle hole 511 is set accordingly.

[0045] The support assembly of the electric drive axle lubrication system provided in the embodiment of the present application can significantly reduce the space occupied by the oil supply system by integrally installing the oil pump 10 and the oil supply distribution base 2 with the filter 3 integrated on the reducer housing 1, which is conducive to the compactness and space miniaturization of the oil supply system. The filter 3 cooperates with the distribution oil path 5 opened in the oil supply distribution base 2 to filter the lubricating oil at the outlet of the oil pump 10 through the filter 3 and then distribute it through the oil hole group 51. At least two oil outlet holes 510 in the oil hole group 51 can deliver the filtered lubricating oil to at least two parts of the motor for lubrication, such as gears, bearings, differentials, etc. The specific position can also be adjusted according to demand, which is highly flexible. In addition, by setting a throttle hole 511 in the oil outlet hole 510 and adjusting the size of the throttle hole 511 according to the oil flow demand of the oil outlet hole 510, the lubricating oil supply amount of the part requiring oil supply can be flexibly adjusted.

[0046] As an optional embodiment of assembling the filter 3 on the oil supply distribution base 2, the oil supply distribution base 2 is provided with a mounting seat 20, the mounting seat 20 is provided with a mounting surface 200, and the mounting surface 200 is provided with an oil hole 201 connected to at least two oil outlet holes 510. The filter 3 is connected to the mounting surface 200, and the outlet of the filter 3 is connected to the oil hole 201. Figures 2 to 3 As shown, the mounting seat 20 is located at the top of the oil supply and distribution base 2, and the mounting surface 200 is located on the side of the mounting seat 20. The filter 3 can be fastened and installed by bolts after being docked on the mounting surface 200. The oil hole 201 is connected between the mounting surface 200 and at least two oil outlet holes 510, and acts as a bridge between the filter 3 and the oil outlet holes 510, so as to smoothly guide the lubricating oil at the outlet of the filter 3 to the at least two oil outlet holes 510 for oil supply and distribution.

[0047] In an optional embodiment, a heat exchanger 4 is also installed on the oil supply distribution base 2, and the distribution oil circuit 5 also includes a second oil hole 52, the second oil hole 52 connects the outlet of the filter 3 with the inlet of the heat exchanger 4, and the inlets of at least two oil outlet holes 510 are connected to the outlet of the heat exchanger 4. The embodiment of the present application provides a more integrated installation method, such as Figure 4As shown, the filter 3 and the heat exchanger 4 are both installed on the oil supply distribution base 2 and are connected in series to allow the lubricating oil to flow, so that the lubricating oil passing through the filter 3 is heat exchanged by the heat exchanger 4 and then distributed through at least two oil outlet holes 510 to be delivered to the part that needs oil supply.

[0048] In an optional embodiment in which the filter 3 and the heat exchanger 4 are assembled on the oil supply distribution base 2, the oil supply distribution base 2 includes a bottom plate 21, and the bottom plate 21 includes a top surface 210, a liquid inlet side surface 211 and a mounting side surface 212 arranged opposite to each other. The filter 3 is connected to the mounting side surface 212 and fastened by bolts, and the first oil hole 50 is opened in the bottom plate 21 and communicates between the liquid inlet side surface 211 and the mounting side surface 212. The heat exchanger 4 is installed on the top surface 210 of the bottom plate 21, and the second oil hole 52 is opened in the bottom plate 21 and communicates between the filter 3 and the heat exchanger 4. Figure 4 As shown, the plate-like structure of the base plate 21 can further reduce the space occupied by the oil supply distribution base 2, the filter 3 is installed on the side of the base plate 21, and the heat exchanger 4 is located on the top of the base plate 21, so as to make full use of the installation space of the base plate 21 and prevent the filter 3 and the heat exchanger 4 from interfering with each other.

[0049] The extension path of the first oil hole 50 can be a straight line. The oil from the oil pump 10 enters the bottom plate 21 from the liquid inlet side 211 and then enters the filter 3 through the first oil hole 50 extending in a straight line, which is conducive to reducing the pressure drop loss of the lubricating oil in the first oil hole 50. The outlet of the second oil hole 52 is opened on the top surface 210 of the bottom plate 21 and is sealed and connected to the inlet of the heat exchanger 4. The total inlet of at least two oil outlet holes 510 is also opened on the top surface 210 of the bottom plate 21 and is sealed and connected to the outlet of the heat exchanger 4 to quickly receive the lubricating oil after heat exchange.

[0050] In an optional embodiment of the oil supply distribution base 2, the oil supply distribution base 2 includes a mounting plate 22, the mounting side 212 is located on the mounting plate 22, and the mounting plate 22 is provided with a first oil hole connecting the first oil hole 50 and the filter 3 and a second oil hole connecting the second oil hole 52 and the heat exchanger 4. Figure 4 As shown, the mounting plate 22 serves to position the filter 3 on the side of the oil supply distribution base 2 , and at the same time connects the filter 3 with the first oil hole 50 and the second oil hole 52 , so as to facilitate the smooth flow of lubricating oil from the filter 3 .

[0051] Alternatively, if Figure 4As shown, a reinforcing rib 220 and a protrusion 221 structure are provided on the side of the mounting plate 22 facing away from the mounting side surface 212. The reinforcing rib 220 is used to increase the structural strength of the mounting plate 22. The protrusion 221 structure provides space for opening the first oil hole and the second oil hole. The first oil hole and the second oil hole in the protrusion 221 are Z-shaped to compensate for the height difference between the inlet of the filter 3 and the first oil hole 50, and between the outlet of the filter 3 and the second oil hole 52.

[0052] Optionally, a slot may be provided on the side of the heat exchanger 4, and the protrusion 221 structure at least partially extends into the slot and is engaged with the slot, which can also play a role in lateral positioning of the heat exchanger 4 and the filter 3, thereby increasing the stability of both.

[0053] In an optional embodiment of the oil hole group 51, the oil hole group 51 further includes an oil outlet manifold 512 located in the bottom plate 21, the oil outlet manifold 512 is connected to the outlet of the heat exchanger 4, and the inlets of at least two of the oil outlet holes 510 can be selectively connected to the side wall or end of the oil outlet manifold 512 as needed. For example, when there are two oil outlet holes 510, one can be connected to the side wall of the oil outlet manifold 512, and the other can be connected to the end of the oil outlet manifold 512. Figure 5 and Figure 6 The arrow in the figure indicates the flow direction of the lubricating oil. Figures 5 and 6 As shown, the throttle hole 511 located in the oil outlet hole 510 controls the amount of lubricating oil entering each oil outlet hole 510, and the outlets of at least two of the oil outlet holes 510 are opened on the outer wall of the reducer housing 1 and connected to the delivery pipeline at the outer wall of the reducer housing 1 to deliver the lubricating oil.

[0054] In an optional embodiment of the bottom plate 21, a water supply channel 213 and a water outlet channel are further provided in the bottom plate 21. The water supply channel 213 is connected to the water inlet of the heat exchanger 4 to supply water to the heat exchanger 4, and the water outlet channel is connected to the water outlet of the heat exchanger 4 to receive the water outlet of the heat exchanger 4. Figure 4 As shown, the water supply channel 213 and the water outlet channel provide a flow channel for the cooling medium in the heat exchanger 4, further increasing the integration of the oil supply distribution base 2. At the same time, the cooling medium flowing in the water supply channel 213 and the water outlet channel can cool the oil supply distribution base 2 and the lubricating oil located therein. The inlet of the water supply channel 213 and the outlet of the water outlet channel can be opened on the bottom surface or side surface of the bottom plate 21.

[0055] The oil pump 10 and the oil supply distribution base 2 can be connected in the following manner: the outlet of the oil pump 10 and the first oil hole 50 are connected through an oil inlet pipe 100 located outside the reducer housing 1 or a channel opened in the reducer housing 1. Figure 1 When the oil inlet pipe 100 located outside the reducer housing 1 is connected, the oil inlet pipe 100 is sealed and connected between the two, which is convenient for disassembly and maintenance. When the two are connected by a channel opened in the reducer housing 1, by directly using the channel in the reducer housing 1, no additional pipeline is required, and the pipeline can be avoided from being exposed, thereby increasing the protection effect of the connection channel between the oil pump 10 and the oil supply distribution base 2.

[0056] In an optional embodiment at the outlet of the oil outlet hole 510, a three-way pipe 23 is installed on the bottom plate 21, the inlet of the three-way pipe 23 is connected to the outlet of the oil outlet hole 510, and the two outlets of the three-way pipe 23 are respectively connected to two delivery pipelines located outside the reducer housing 1; or one outlet is connected to the delivery pipeline located outside the reducer housing 1, and the other is connected to the oil circuit inside the reducer housing 1; or the two outlets are respectively connected to the oil circuits inside the two reducer housings 1. The three-way pipe 23 can increase the oil supply path and further improve the flexibility of oil supply.

[0057] Optionally, the heat exchanger 4 is provided with a mounting hole, the bottom plate 21 is provided with a middle hole, and the reducer housing 1 is provided with a positioning hole. The mounting hole, the middle hole and the positioning hole are aligned and connected through a mounting rod. The mounting rod in the embodiment of the present application can be a screw rod, and the mounting hole, the middle hole and the positioning hole are all threaded holes. The heat exchanger 4, the bottom plate 21 and the reducer housing 1 are fastened by the screw rod, which is stable and reliable. Alternatively, the mounting rod can be a riveted rod, and the heat exchanger 4, the bottom plate 21 and the reducer housing 1 are fastened by riveting with the riveted rod.

[0058] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0059] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. A support assembly of an electric drive axle lubrication system, characterized in that: include: The reducer housing is equipped with an oil pump; An oil supply distribution base is located on the reducer housing, a filter is installed on the oil supply distribution base, an oil distribution circuit is arranged in the oil supply distribution base, and the oil distribution circuit includes a first oil hole and an oil hole group; The first oil hole communicates the outlet of the oil pump with the inlet of the filter; The oil hole group includes at least two oil outlet holes, and the outlets of the at least two oil outlet holes are used to transport lubricating oil to at least one of the inside of the reducer housing and the outside of the reducer housing; A throttling hole is arranged in the oil outlet hole, and the diameter of the throttling hole is positively correlated with the amount of oil required to pass through the oil outlet hole; A heat exchanger is also installed on the oil supply distribution base, and the distribution oil circuit also includes a second oil hole, which connects the outlet of the filter with the inlet of the heat exchanger, and the inlets of at least two of the oil outlet holes are connected with the outlet of the heat exchanger; The oil supply distribution base includes a bottom plate, and the bottom plate includes a top surface, a liquid inlet side surface and a mounting side surface that are oppositely arranged; the filter is connected to the mounting side surface, and the first oil hole is opened in the bottom plate and communicated between the liquid inlet side surface and the mounting side surface; The heat exchanger is mounted on the top surface of the bottom plate, and the second oil hole is opened in the bottom plate and communicates between the filter and the heat exchanger; The outlet of the oil pump is connected to the first oil hole through an oil inlet pipe located outside the reducer housing or a channel opened in the reducer housing.

2. The support assembly of the electric drive axle lubrication system according to claim 1, characterized in that: The oil supply distribution base comprises a mounting plate, the mounting side is located on the mounting plate, and the mounting plate is provided with a first oil outlet hole and a second oil outlet hole; The first oil hole communicates with the first oil hole and the inlet of the filter, and the second oil hole communicates with the second oil hole and the outlet of the filter.

3. The support assembly of the electric drive axle lubrication system according to claim 1, characterized in that: The oil hole group also includes an oil outlet main pipe located in the bottom plate, the oil outlet main pipe is connected to the outlet of the heat exchanger, the inlets of at least two of the oil outlet holes are connected to the oil outlet main pipe, and the outlets of at least two of the oil outlet holes are opened on the outer wall of the reducer housing.

4. The support assembly of the electric drive axle lubrication system according to claim 1, characterized in that: A water supply channel and a water outlet channel are also provided in the bottom plate. The water supply channel is connected to the water inlet of the heat exchanger, and the water outlet channel is connected to the water outlet of the heat exchanger.

5. The support assembly of the electric drive axle lubrication system according to any one of claims 1 to 4, characterized in that: A tee is installed on the bottom plate, the inlet of the tee is connected to the outlet of the oil outlet hole, and the two outlets of the tee are respectively connected to two delivery pipelines outside the reducer housing; or one outlet is connected to the delivery pipeline outside the reducer housing, and the other is connected to the oil circuit in the reducer housing; or the two outlets are respectively connected to the two oil circuits in the reducer housing.

6. The support assembly of the electric drive axle lubrication system according to any one of claims 1 to 4, characterized in that: The heat exchanger is provided with a mounting hole, the bottom plate is provided with a middle hole, the reducer housing is provided with a positioning hole, and the mounting hole, the middle hole and the positioning hole are aligned and connected through a mounting rod.

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