Lubricating system, electric drive axle and vehicle

Abstract

The utility model belongs to the technical field of automobile electric drive axle, disclose a kind of lubricating system, electric drive axle and vehicle.The lubricating system is used for electric drive axle speed reducer and differential, and lubricating system includes multiple first oil receiving parts, multiple first oil retaining parts and multiple first oil inlet, multiple first oil inlet is used to set on multiple bearing seat, at least one first oil receiving part and one first oil retaining part can be fixedly connected on each bearing seat, and first oil receiving part and first oil retaining part are formed into first oil storage groove by surrounding, first oil storage groove is used to store lubricating oil, and multiple first oil storage groove can be communicated with the first oil inlet on multiple bearing seat one by one.The lubricating system is small, and lubrication effect is good.

Description

Technical Field

[0001] This utility model relates to the field of automotive electric drive axle technology, and in particular to a lubrication system, an electric drive axle, and a vehicle. Background Technology

[0002] Lubrication is crucial for bearings, splines, and gears. Good lubrication can ensure their lifespan and performance. This is especially true for electric drive axles in new energy vehicles, where high-speed motors use high-speed bearings. Insufficient lubricating oil supply can lead to premature bearing damage, excessive vibration and noise, and damage to splines and gears, directly affecting the performance of the electric drive axle.

[0003] In existing technologies, lubricating oil is generally agitated by internal gears, collected by oil-collecting ribs, and directed to various bearings for lubrication and cooling. However, due to the high speed of the motor and the large flow rate of oil through the oil-collecting ribs, some lubricating oil will flow out of the ribs and fail to reach the bearings, resulting in significant oil agitation losses in the gears inside the reducer. Utility Model Content

[0004] The purpose of this invention is to provide a lubrication system, an electric drive axle, and a vehicle, wherein the lubrication system has low oil churning loss and good lubrication effect.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] On one hand, a lubrication system is provided for lubricating the reducer and differential of an electric drive axle. The reducer includes a housing and a cover, and a first shaft, a second shaft, and a third shaft are sequentially connected between the housing and the cover. Multiple bearing seats are provided on the housing and the cover, and each bearing seat contains a reducer bearing. The first shaft, the second shaft, and the third shaft are rotatably connected between the housing and the cover via multiple reducer bearings. The differential includes a first housing, a second housing, a half-shaft, and two differential bearings. The two ends of the half-shaft are rotatably connected to the first housing and the second housing via two differential bearings, respectively.

[0007] The lubrication system includes multiple first oil receiving components, multiple first oil blocking components, and multiple first oil inlets. The multiple first oil inlets are used to be installed on multiple bearing seats. Each bearing seat can be fixedly connected to at least one first oil receiving component and one first oil blocking component. The first oil receiving components and the first oil blocking components surround to form a first oil storage tank. The first oil storage tank is used to store lubricating oil. The multiple first oil storage tanks can be connected to the first oil inlets on the multiple bearing seats one by one.

[0008] Preferably, the lubrication system further includes a second oil stop component, the first end of which is fixed to the side wall of the housing near the differential, and the second end of which gradually approaches the third shaft.

[0009] Preferably, the lubrication system further includes a second oil receiving component and a second oil inlet. The second oil inlet is used to connect the reducer and the differential. The second oil receiving component is fixedly connected to the second oil blocking component. The second oil receiving component is provided with a second oil reservoir, and the opening of the second oil reservoir is connected to the second oil inlet.

[0010] Preferably, the second oil receiving member is inclined, and the end of the second oil receiving member away from the second oil blocking member is higher than the other end of the second oil receiving member.

[0011] Preferably, the lubrication system further includes an oil collection cover, which is disposed in the bearing housing of the third shaft. The oil collection cover includes an oil collection cover body, an oil receiving groove, and a first oil guiding channel. The oil collection cover body has a first disc surface and a second disc surface arranged opposite to each other. The first disc surface can be arranged opposite to the bearing of the third shaft. The oil receiving groove is disposed on the second disc surface and is used to contain lubricating oil. One end of the first oil guiding channel is connected to the oil receiving groove, and the other end of the first oil guiding channel is used to connect to the internal oil hole of the third shaft.

[0012] Preferably, the oil collection cover is provided with an oil inlet hole, through which lubricating oil can flow to the reducer bearing of the third shaft.

[0013] Preferably, the lubrication system further includes an oil guide ring and an oil collection cap, which are used to pass through the half shaft. The oil guide ring and the oil collection cap are located between the first housing and the differential bearing near the first housing. The oil collection cap is provided with a plurality of claws at intervals, one end of which abuts against the oil guide ring, so that there is a first oil storage cavity between the oil guide ring and the oil collection cap. The oil guide ring is provided with a plurality of small holes, through which the lubricating oil in the first oil storage cavity can flow to the differential bearing.

[0014] Preferably, the oil guide ring and the half shaft are fitted with a clearance to create a second oil guide channel between them.

[0015] In a second aspect, an electric drive axle is provided, including a motor, a reducer, a differential, and a lubrication system of any of the above technical solutions. A first shaft, a second shaft, and a third shaft are sequentially connected by a first shaft gear assembly, a second shaft gear assembly, and a third shaft gear assembly. The differential includes a first housing, a second housing, a half shaft, a differential bearing, and a differential gear. One end of the half shaft is rotatably connected to the first housing, and the other end of the half shaft is rotatably connected to the second housing. The second housing and the half shaft enclose a second oil reservoir. The third shaft gear assembly meshes with the differential gear. The third shaft is configured as a hollow shaft so that the third shaft has an internal oil hole extending along the axial direction.

[0016] Thirdly, a vehicle is provided that includes an electric drive axle according to any of the above-mentioned technical solutions.

[0017] The beneficial effects of this utility model are as follows:

[0018] A lubrication system, an electric drive axle, and a vehicle are provided. The lubrication system allows at least one first oil receiving element and one first oil blocking element to be fixedly connected to each bearing housing. The first oil receiving element and the first oil blocking element surround and form a first oil reservoir. The first oil reservoir can communicate with a first oil inlet on the corresponding bearing housing. This allows the oil flow on the reducer housing wall and the lubricating oil splashed by gear churning to be stored in the first oil reservoir and flow into the first oil inlet to lubricate the reducer bearing. The lubrication system has low churning loss and good lubrication effect.

[0019] The bearings inside the electric drive axle using this lubrication system can receive sufficient lubrication and cooling, preventing electric drive axle failure due to insufficient lubrication. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the lubrication system provided by this utility model located in the housing;

[0021] Figure 2 This is an isometric view of the lubrication system provided by this utility model located in the housing;

[0022] Figure 3 This is a schematic diagram of the lubrication system provided by this utility model located in the housing cover;

[0023] Figure 4 This is an isometric view of the lubrication system provided by this utility model located in the housing cover;

[0024] Figure 5 This is a partial structural diagram of the lubrication system provided by this utility model located on the third axis;

[0025] Figure 6 This is a first-view structural schematic diagram of the oil collection cover provided by this utility model;

[0026] Figure 7 This is a second-view structural schematic diagram of the oil collection cover provided by this utility model;

[0027] Figure 8 This is a partial structural diagram of the lubrication system provided by this utility model located in the differential;

[0028] Figure 9 This is a schematic diagram of the structure of the oil guide ring provided by this utility model;

[0029] Figure 10 This is a schematic diagram of the structure of the oil collection cap provided by this utility model;

[0030] Figure 11 This is a schematic diagram of the structure of the electric drive bridge provided by this utility model;

[0031] Figure 12 This is a schematic diagram of the structure of the second housing of the differential provided by this utility model;

[0032] Figure 13 This is a structural schematic diagram of the third shaft gear assembly provided by this utility model.

[0033] In the picture:

[0034] 110. Housing; 120. Housing cover; 130. First shaft; 140. Second shaft; 150. Third shaft; 160. Bearing housing; 170. Reducer bearing; 180. First gear driven gear; 190. Needle roller bearing;

[0035] 210, First housing; 220, Second housing; 230, Half shaft; 240, Differential bearing; 250, Second oil reservoir; 260, Differential gear;

[0036] 1. First oil receiving component; 2. First oil blocking component; 3. First oil inlet; 4. First oil reservoir; 5. Second oil inlet; 6. Second oil blocking component; 7. Second oil receiving component; 8. Second oil reservoir;

[0037] 9. Oil collection hood; 91. Oil collection hood body; 92. Oil receiving groove; 93. First oil guide channel; 94. Oil inlet; 95. Limiting component;

[0038] 10. Oil guide ring; 101. Small hole;

[0039] 11. Oil collection cap; 111. Clamping claw;

[0040] 12. First oil storage chamber; 13. Oil return port. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] Firstly, this embodiment provides a lubrication system for lubricating the reducer and differential of the electric drive axle. Please refer to [reference needed]. Figure 10 and Figure 11 The reducer includes a housing 110 and a cover 120. A first shaft 130, a second shaft 140, and a third shaft 150 are sequentially connected between the housing 110 and the cover 120. Multiple bearing seats 160 are respectively provided on the housing 110 and the cover 120, and each bearing seat 160 is provided with a reducer bearing 170. The first shaft 130, the second shaft 140, and the third shaft 150 are rotatably connected between the housing 110 and the cover 120 through multiple reducer bearings 170. Specifically, the housing 110 and the cover 120 are detachably connected and enclose a space for storing lubricating oil. The first shaft 130, the second shaft 140, and the third shaft 150 are all located within the space.

[0046] The differential includes a first housing 210, a second housing 220, a half shaft 230, and two differential bearings 240. The two ends of the half shaft 230 are rotatably connected to the first housing 210 and the second housing 220 respectively through the two differential bearings 240. Specifically, the first housing 210 and the second housing 220 are detachably connected.

[0047] Since the electric drive axle is driven by the high-speed rotation of the motor, both the reducer bearing 170 and the differential bearing 240 are high-speed bearings. Traditional solid bearing oil cooling and lubrication methods cannot meet the lubrication requirements of high-speed bearings. When the supply of lubricating oil is insufficient, it can lead to problems such as premature bearing damage, high vibration and noise, and damage to splines and gears, which directly affect the performance of the electric drive axle. Therefore, a lubrication system is needed to lubricate the reducer and differential of the electric drive axle.

[0048] The specific structure of the lubrication system is described below:

[0049] Please refer to Figures 1 to 11 The lubrication system includes multiple first oil receiving parts 1, multiple first oil blocking parts 2, and multiple first oil inlets 3. The multiple first oil inlets 3 are used to be installed on multiple bearing seats 160. At least one first oil receiving part 1 and one first oil blocking part 2 can be fixedly connected to each bearing seat 160. The first oil receiving parts 1 and the first oil blocking parts 2 surround to form a first oil storage tank 4. The first oil storage tank 4 is used to store lubricating oil. The multiple first oil storage tanks 4 can be connected one-to-one with the first oil inlets 3 on the multiple bearing seats 160. With this configuration, at least one first oil receiving component 1 and one first oil blocking component 2 are fixedly connected to each bearing housing 160, and the first oil receiving component 1 and the first oil blocking component 2 form a first oil storage tank 4. The first oil storage tank 4 can communicate with the first oil inlet 3 on the corresponding bearing housing 160, so that the oil flow on the wall of the reducer housing 110 and the lubricating oil splashed by the gear churning can be stored in the first oil storage tank 4 and flow into the first oil inlet 3 to lubricate the reducer bearing 170. The lubrication system has low oil churning loss and good lubrication effect.

[0050] Preferably, the bearing housing 160 is also provided with an oil return port 13. After one reducer bearing 170 is lubricated by lubricating oil, the excess lubricating oil can flow out from the oil return port 13 and enter another reducer bearing 170, or flow into the receiving space, and form an oil flow by the gear stirring oil, so that the lubricating oil can be recycled and saved.

[0051] In some embodiments, a bearing housing 160 may be provided with a plurality of first oil inlets 3, and a plurality of first oil receiving parts 1 and first oil blocking parts 2, the same number as the number of first oil inlets 3, are fixedly connected thereto. The plurality of first oil storage grooves 4 formed by the first oil receiving parts 1 and the first oil blocking parts 2 are connected to the plurality of first oil inlets 3 in a one-to-one correspondence. This arrangement allows more lubricating oil to enter the bearing housing 160 to lubricate the reducer bearing 170, further improving the lubrication effect of the lubrication system.

[0052] Alternatively, please refer to Figure 2The lubrication system also includes a second oil stop 6. The first end of the second oil stop 6 is fixed to the side wall of the housing 110 near the differential, and the second end of the second oil stop 6 gradually approaches the third shaft 150. With this arrangement, under the influence of gravity, the lubricating oil flowing down the wall of the housing 110 and the lubricating oil splashed by the gears of the third shaft 150 can flow along the second oil stop 6 and be stored at the connection between the second end of the second oil stop 6 and the housing 110. This facilitates oil churning by the gears of the third shaft 150, reduces churning losses, and improves lubrication efficiency.

[0053] Optionally, the lubrication system further includes a second oil receiving component 7 and a second oil inlet 5. The second oil inlet 5 connects the reducer and the differential. The second oil receiving component 7 is fixedly connected to the second oil blocking component 6, and a second oil reservoir 8 is provided on the second oil receiving component 7. The opening of the second oil reservoir 8 communicates with the second oil inlet 5. With this configuration, a portion of the lubricating oil flowing along the second oil blocking component 6 can be collected in the second oil reservoir 8 through the second oil receiving component 7 and flow into the differential through the second oil inlet 5 to lubricate the differential, ensuring the lubrication effect of the lubrication system.

[0054] Optionally, the second oil receiving member 7 is inclined, and the end of the second oil receiving member 7 away from the second oil blocking member 6 is higher than the other end of the second oil receiving member 7. With this arrangement, under the action of gravity, it is convenient for the lubricating oil in the second oil storage tank 8 of the second oil receiving member 7 to flow into the second oil inlet 5.

[0055] Alternatively, please refer to Figures 5 to 7 The lubrication system also includes an oil collection cover 9, which is disposed within the bearing housing 160 of the third shaft 150. The oil collection cover 9 includes an oil collection cover body 91, an oil receiving groove 92, and a first oil guiding channel 93. The oil collection cover body 91 has a first disc surface and a second disc surface arranged opposite to each other. The first disc surface can be arranged opposite to the bearing of the third shaft 150. The oil receiving groove 92 is disposed on the second disc surface and is used to contain lubricating oil. One end of the first oil guiding channel 93 communicates with the oil receiving groove 92, and the other end of the first oil guiding channel 93 communicates with the internal oil hole of the third shaft 150. Specifically, the oil collection cover 9 is located within the bearing housing 160 of the cover 120 and is fixed inside the reducer by the reducer bearing 170 of the third shaft 150. After the lubricating oil lubricates the bearing of the second shaft 140, it flows into the oil receiving groove 92 through the channel between the second shaft 140 and the housing cover 120, and then flows into the internal oil hole of the third shaft 150 through the first oil guide channel 93. It then flows to the needle roller bearing 190 and the gear seat through the lubricating oil hole opened in the circumferential direction of the third shaft 150, and fully lubricates the needle roller bearing 190 and the gear seat.

[0056] Optionally, the oil collection cover 91 is provided with an oil inlet hole 94, through which lubricating oil can flow to the reducer bearing 170 of the third shaft 150. Specifically, after the oil receiving groove 92 is full of lubricating oil, the lubricating oil flows into the gap between the oil collection cover 91 and the housing cover 120. The lubricating oil in the gap flows through the oil inlet hole 94 on the oil collection cover 91 to the reducer bearing 170 of the third shaft 150 near the housing 110, ensuring sufficient lubrication.

[0057] Optionally, multiple oil inlets 94 are provided to allow lubricating oil to flow quickly to the bearings of the third shaft 150.

[0058] Alternatively, please refer to Figure 6 The oil collection cover 91 is also provided with a limiting member 95. The bearing seat 160 of the third shaft 150 is provided with a limiting groove. The limiting member 95 can be engaged in the limiting groove so that the opening of the oil collection groove 92 always faces upward. The position of the oil collection cover 9 is fixed relative to the shell cover 120, thereby preventing the oil collection cover 9 from rotating with the rotation of the third shaft 150, which would cause the lubricating oil in the oil collection groove 92 to flow out.

[0059] In some embodiments, an oil drain port is provided on the side wall of the oil receiving groove 92, with the bottom of the drain port higher than the bottom of the first oil guiding channel 93. When the level of the lubricating oil entering the oil receiving groove 92 exceeds the bottom of the drain port, the lubricating oil flows through the drain port 15 to the gap between the oil collecting cover 9 and the housing cover 120, and then flows through the oil inlet hole 94 on the oil collecting cover 91 to the reducer bearing 170 on the side of the third shaft 150 near the housing 110. With this configuration, the lubricating oil does not need to fill the oil receiving groove to flow out from the drain port, reducing the amount of lubricating oil required for lubrication, saving costs, and improving the lubrication efficiency of the lubrication system.

[0060] Alternatively, please refer to Figures 8 to 10 The lubrication system also includes an oil guide ring 10 and an oil collection cap 11. The oil guide ring 10 and the oil collection cap 11 are mounted on the half-shaft 230 and are located between the first housing 210 and the differential bearing 240 near the first housing 210. The oil collection cap 11 has multiple claws 111 spaced apart, one end of which abuts against the oil guide ring 10, creating a first oil reservoir 12 between the oil guide ring 10 and the oil collection cap 11. The oil guide ring 10 has multiple small holes 101, allowing lubricating oil in the first oil reservoir 12 to flow to the differential bearing 240 through the small holes 101. This configuration allows lubricating oil flowing in from the second oil inlet 5 to collect in the first oil reservoir 12 and flow out through the small holes 101 on the oil guide ring 10, thus lubricating the differential bearing 240 near the first housing 210.

[0061] Optionally, the oil guide ring 10 and the half shaft 230 are clearance-fitted to provide a second oil guide channel between them. This arrangement facilitates the flow of lubricating oil in the first oil reservoir 12 through the second oil guide channel to the planetary gears, half shaft gears, and splines inside the differential, ensuring sufficient lubrication of the differential by the lubrication system.

[0062] In some embodiments, when the first oil reservoir 12 is full of lubricating oil, the lubricating oil that lubricates the differential bearing 240 near the first housing 210 can flow through the second oil guide channel to the planetary gears, half-shaft gears and splines inside the differential, ensuring that the lubrication system provides sufficient lubrication to the differential.

[0063] Preferably, please refer to Figure 10 The claw 111 is inclined and gradually approaches the axis of the half shaft 230 from one end abutting against the oil guide ring 10 to the end connected to the oil collection cover 11. This inclined arrangement of the claw 111 facilitates the flow of lubricating oil along the claw 111 into the small hole 101 and / or the second oil guide channel, further improving the lubrication effect of the lubrication system.

[0064] Secondly, please refer to Figure 8 and Figure 11 This embodiment provides an electric drive axle, including a motor, a reducer, a differential, and the aforementioned lubrication system. A first shaft 130, a second shaft 140, and a third shaft 150 are sequentially connected via a first shaft gear assembly, a second shaft gear assembly, and a third shaft gear assembly. The differential includes a first housing 210, a second housing 220, a half-shaft 230, a differential bearing 240, and a differential gear 260. One end of the half-shaft 230 is rotatably connected to the first housing 210, and the other end is rotatably connected to the second housing 220. The second housing 220 and the half-shaft 230 form a second oil reservoir 250. The third shaft gear assembly meshes with the differential gear 260. The third shaft 150 is configured as a hollow shaft, allowing it to have internal oil holes extending along its axial direction. This configuration allows lubricating oil in the second oil guide channel to flow into the second oil reservoir 250, providing sufficient lubrication to the differential gear 260 and splines inside the differential, preventing insufficient lubrication that could lead to electric drive axle failure.

[0065] Specifically, the first shaft gear assembly includes an input gear, the second shaft gear assembly includes a first-gear drive gear and a second-gear drive gear, and the third shaft gear assembly includes a shifting mechanism, a first-gear driven gear 180, a second-gear driven gear, and an output gear. The motor drives the first shaft 130 to rotate. The first shaft 130 transmits power to the second shaft 140 through the input gear. Through the shifting mechanism of the third shaft 150, the first-gear drive gear meshes with the first-gear driven gear 180; or, the second-gear drive gear meshes with the second-gear driven gear, disengaging the first and second gears, thereby transmitting power to the third shaft 150. The third shaft 150 transmits power to the differential through the output gear, and finally outputs power to the wheel ends through the half-shaft 230.

[0066] Thirdly, this embodiment provides a vehicle that includes the aforementioned electric drive axle. The vehicle can be a sedan, truck, construction vehicle, etc., and this embodiment does not impose specific limitations on this.

[0067] The lubrication process of the electric drive axle of the vehicle provided in this embodiment is as follows:

[0068] The reducer bearing 170 and differential bearing 240 on one side of housing 110 are lubricated by the oil agitation of the third shaft gear assembly. The third shaft gear assembly agitates the oil to the side wall of housing 110 and the first oil inlet 3. The reducer bearing 170 on the side of first shaft 130 near housing 110 is lubricated by the oil flow down the side wall of housing 110. The oil return port 13 of bearing seat 160 on the side of first shaft 130 near housing 110 and the oil flow on the side wall of housing 110 converge and lubricate the reducer bearing 170 on the side of second shaft 140 near housing 110. The reducer bearing 170 on the side of third shaft 150 near housing 110 is lubricated by the oil flow down the side wall of housing 110. The oil flow on the side wall of housing 110 is collected along the second oil receiving part 7 and gathered in the second oil storage groove 8 on the second oil blocking part 6, and flows to the first differential housing 210 through the second oil inlet 5.

[0069] The reducer bearing 170 and differential bearing 240 on one side of the housing 120 are both lubricated by oil churning via the differential gear 260. Please refer to [reference needed]. Figure 4 The lubricating oil flows through the first oil receiving part 1 and the first oil blocking part 2 cast on the reducer housing cover 120, and then through the first oil inlet 3 into the bearing housing 160 near the housing cover 120 to lubricate the reducer bearing 170; please refer to Figure 3The differential gear 260 agitates the oil, forming an oil flow to lubricate the reducer bearing 170 on the side of the first shaft 130 near the housing cover 120. The oil return port 13 on the bearing seat 160 on the side of the first shaft 130 near the housing cover 120 and the lubricating oil flowing down the side wall of the housing cover 120 merge to form an oil flow to lubricate the reducer bearing 170 on the side of the second shaft 140 near the housing cover 120. The oil flow formed by the differential gear 260 agitating the oil and the oil flow formed by the oil return port 13 on the bearing seat 160 on the side of the second shaft 140 near the housing cover 120 form the oil flow of the reducer bearing 170 and the needle roller bearing 190 on the side of the third shaft 150 near the housing cover 120.

[0070] Please refer to Figure 5 After the lubricating oil lubricates the reducer bearing 170 of the second shaft 140, it flows into the oil receiving groove 92 through the channel between the second shaft 140 and the housing cover 120, and then flows into the internal oil hole of the third shaft 150 through the first oil guide channel 93. It then flows to the needle roller bearing 190 and the gear seat through the lubricating oil hole opened in the circumferential direction of the third shaft 150, and fully lubricates the needle roller bearing 190 and the gear seat.

[0071] Please refer to Figures 8 to 12 Lubricating oil flows into the differential through the second oil inlet 5, collects in the first oil reservoir 12, and flows out through the small hole 101 on the oil guide ring 10 to lubricate the differential bearing 240 near the first housing 210. When the lubricating oil in the first oil reservoir 12 is full, the lubricating oil enters the differential through the second oil guide channel to lubricate the differential planetary gears, half shaft gears and splines. The lubricating oil flows from the second oil guide channel to the second oil reservoir 250, forming a closed lubrication system for the differential, which fully lubricates the differential gears 260 and splines inside the differential, avoiding insufficient lubrication that could lead to electric drive axle failure.

[0072] Please refer to Figure 5 and Figure 13 Inside the reducer cavity, the oil is stirred by the third shaft gear assembly and the differential gear 260 to form an oil flow. The oil flows into the gear seat through the oil passage on the third shaft gear assembly, lubricating the meshing splines of the gear seat and the third shaft 150.

[0073] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A lubrication system for lubricating the reducer and differential of an electric drive axle, the reducer comprising a housing (110) and a cover (120), wherein a first shaft (130), a second shaft (140), and a third shaft (150) are sequentially connected between the housing (110) and the cover (120), and a plurality of corresponding bearing seats (160) are respectively provided on the housing (110) and the cover (120), each bearing seat (160) containing a reducer bearing (170). The first shaft (130), the second shaft (140), and the third shaft (150) are rotatably connected between the housing (110) and the cover (120) via a plurality of reducer bearings (170); the differential includes a first housing (210), a second housing (220), a half shaft (230), and two differential bearings (240), the two ends of the half shaft (230) being rotatably connected to the first housing (210) and the second housing (220) respectively via the two differential bearings (240); Its features are, The lubrication system includes multiple first oil receiving parts (1), multiple first oil blocking parts (2), and multiple first oil inlets (3). The multiple first oil inlets (3) are used to be installed on multiple bearing seats (160). Each bearing seat (160) can be fixedly connected to at least one first oil receiving part (1) and one first oil blocking part (2). The first oil receiving part (1) and the first oil blocking part (2) surround to form a first oil storage tank (4). The first oil storage tank (4) is used to store lubricating oil. The multiple first oil storage tanks (4) can be connected one-to-one with the first oil inlets (3) on the multiple bearing seats (160).

2. The lubrication system according to claim 1, characterized in that, The lubrication system also includes a second oil stop (6), the first end of which is fixed to the side wall of the housing (110) near the differential, and the second end of which gradually approaches the third shaft (150).

3. The lubrication system according to claim 2, characterized in that, The lubrication system further includes a second oil inlet (5) and a second oil receiving component (7). The second oil inlet (5) is used to connect the reducer and the differential. The second oil receiving component (7) is fixedly connected to the second oil baffle (6). The second oil receiving component (7) is provided with a second oil storage tank (8). The opening of the second oil storage tank (8) is connected to the second oil inlet (5).

4. The lubrication system according to claim 3, characterized in that, The second oil receiving member (7) is inclined, and the end of the second oil receiving member (7) away from the second oil blocking member (6) is higher than the other end of the second oil receiving member (7).

5. The lubrication system according to claim 1, characterized in that, The lubrication system also includes an oil collection cover (9), which is disposed in the bearing housing (160) of the third shaft (150). The oil collection cover (9) includes an oil collection cover body (91), an oil receiving groove (92), and a first oil guiding channel (93). The oil collection cover body (91) has a first disc surface and a second disc surface arranged opposite to each other. The first disc surface can be arranged opposite to the bearing of the third shaft (150). The oil receiving groove (92) is disposed on the second disc surface and is used to contain lubricating oil. One end of the first oil guiding channel (93) is connected to the oil receiving groove (92), and the other end of the first oil guiding channel (93) is used to connect to the internal oil hole of the third shaft (150).

6. The lubrication system according to claim 5, characterized in that, The oil collection cover (91) is provided with an oil inlet hole (94), through which lubricating oil can flow to the reducer bearing (170) of the third shaft (150).

7. The lubrication system according to claim 1, characterized in that, The lubrication system further includes an oil guide ring (10) and an oil collection cap (11). The oil guide ring (10) and the oil collection cap (11) are used to pass through the half shaft (230). The oil guide ring (10) and the oil collection cap (11) are located between the first housing (210) and the differential bearing (240) near the first housing (210). The oil collection cap (11) is provided with a plurality of claws (111) at intervals. One end of the plurality of claws (111) abuts against the oil guide ring (10) so that there is a first oil storage chamber (12) between the oil guide ring (10) and the oil collection cap (11). The oil guide ring (10) is provided with a plurality of small holes (101). The lubricating oil in the first oil storage chamber (12) can flow to the differential bearing (240) through the plurality of small holes (101).

8. The lubrication system according to claim 7, characterized in that, The oil guide ring (10) and the half shaft (230) are fitted with a clearance so that there is a second oil guide channel between the oil guide ring (10) and the half shaft (230).

9. An electric drive bridge, characterized in that, The system includes a motor, a reducer, a differential, and a lubrication system as described in any one of claims 1-8. The first shaft (130), the second shaft (140), and the third shaft (150) are sequentially connected by a first shaft gear assembly, a second shaft gear assembly, and a third shaft gear assembly (180). The differential includes a first housing (210), a second housing (220), a half shaft (230), a differential bearing (240), and a differential gear (260). One end of the half shaft (230) is rotatably connected to the first housing (210), and the other end of the half shaft (230) is rotatably connected to the second housing (220). The second housing (220) and the half shaft (230) enclose a second oil reservoir (250). The third shaft gear assembly (180) meshes with the differential gear (260). The third shaft (150) is configured as a hollow shaft, such that the third shaft (150) has an internal oil hole extending along the axial direction.

10. A vehicle, characterized in that, The vehicle includes the electric drive axle as described in claim 9.

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