Electric motor bearing lubricating system and vehicle

Abstract

The present invention relates to the technical field of bearing lubrication, and specifically provides an electric motor bearing lubricating system and a vehicle, which aim to solve the problem of a vehicle not being able to operate normally due to a bearing being in a state of oil starvation. To this, the electric motor bearing lubricating system of the present invention comprises a housing, an electric motor shaft and a bearing, wherein the housing is provided with an oil intake channel; the electric motor shaft is arranged in the housing; and the bearing is arranged in the housing and sleeved on the electric motor shaft, with a first oil reservoir being formed in the bearing, the first oil reservoir being configured to be in communication with the oil intake channel. By means of the provision of the first oil reservoir in the bearing that is in communication with the oil intake channel, lubricating oil can flow into the first oil reservoir to realize lubrication of parts inside the bearing; in addition, when the bearing is in the state of oil starvation, the lubricating oil in the first oil reservoir can support normal operation of the bearing for a short period of time, ensuring normal starting of the vehicle; and a certain cooling effect can also be achieved, thereby prolonging the service life of the bearing.

Description

Motor bearing lubrication system and vehicle

[0001] This application claims priority to Chinese patent application No. 202323344123.0, filed on December 4, 2023, entitled “Motor Bearing Lubrication System and Vehicle”. The entire contents of the above-mentioned Chinese patent application are incorporated into this application by reference. Technical Field

[0002] The present invention relates to the technical field of bearing lubrication, and in particular provides a motor bearing lubrication system and a vehicle. Background Art

[0003] To meet the trend of high-speed operation of electric drive systems, more and more motors are using oil cooling to cool the motors. Compared with traditional water cooling, oil cooling has better heat dissipation effect. In addition, while the lubricating oil cools the motor, part of the lubricating oil also lubricates and cools the bearings, further increasing the maximum speed of the motor.

[0004] In oil-cooled motors, the non-drive-end bearing is often actively lubricated using an oil pump. However, this lubrication method presents numerous challenges. For example, if the active lubrication pump fails or the motor is restarted after a prolonged shutdown at low temperatures, the bearing may be starved of oil, causing it to malfunction, posing a risk.

[0005] Therefore, this field needs a new technical solution to solve the above problems.

[0006] Summary of the Invention

[0007] The present invention aims to solve the above technical problem, that is, to solve the problem that the vehicle cannot operate normally due to the lack of oil in the bearing.

[0008] The present invention provides a motor bearing lubrication system, the motor bearing lubrication system comprising:

[0009] a housing, on which an oil inlet passage is formed;

[0010] a motor shaft, the motor shaft being disposed in the housing;

[0011] A bearing is arranged in the housing and sleeved on the motor shaft. A first oil storage tank is provided inside the bearing. The first oil storage tank is configured to be in communication with the oil inlet channel.

[0012] In the preferred technical solution of the above-mentioned motor bearing lubrication system, the motor bearing lubrication system further comprises a steel sleeve disposed in the housing and capable of inserting the motor shaft therein, wherein an inner wall of the steel sleeve and an outer wall of the motor shaft enclose a bearing chamber capable of mounting the bearing;

[0013] The steel sleeve is provided with an oil inlet hole, and the oil inlet hole can be communicated with the first oil storage tank and the oil inlet channel respectively.

[0014] In the preferred technical solution of the above motor bearing lubrication system, a first gap exists between the bearing and the steel sleeve, and the first gap is communicated with the first oil storage tank and the oil inlet hole respectively.

[0015] In the preferred technical solution of the above-mentioned motor bearing lubrication system, the motor bearing lubrication system also includes a shoulder arranged on the steel sleeve, the shoulder extending in the direction close to the motor shaft, the shoulder, the steel sleeve and the motor shaft together form the bearing chamber, and there is a second gap between the shoulder and the bearing that is connected to the first gap.

[0016] In the preferred technical solution of the above-mentioned motor bearing lubrication system, the bearing includes an inner ring, an outer ring, balls, and a first oil deflector ring. The inner ring is sleeved on the motor shaft and disposed in the outer ring. The balls are disposed between the inner ring and the outer ring. The first oil deflector ring is disposed on a side of the bearing away from the shoulder and is disposed between the inner ring and the outer ring.

[0017] The outer ring, the first oil retaining ring, the balls and the retaining shoulder are arranged to form the first oil storage groove.

[0018] In the preferred technical solution of the above motor bearing lubrication system, an oil outlet is provided on the first oil deflector ring, and the oil outlet is communicated with the first oil storage tank.

[0019] In the preferred technical solution of the above motor bearing lubrication system, the distance between the side of the shoulder away from the motor shaft and the motor shaft axis is greater than the distance between the side of the oil outlet away from the motor shaft and the motor shaft axis.

[0020] In the preferred technical solution of the above-mentioned motor bearing lubrication system, the bearing also includes a second oil detent ring arranged on the side of the bearing close to the shoulder, the second oil detent ring is arranged between the inner ring and the outer ring, and an oil inlet is opened on it, and the oil inlet is connected to the first oil storage tank.

[0021] In the preferred technical solution of the above motor bearing lubrication system, the distance between the side of the shoulder away from the motor shaft and the motor shaft axis is greater than the distance between the side of the oil inlet away from the motor shaft and the motor shaft axis.

[0022] In a preferred technical solution of the above-mentioned motor bearing lubrication system, the bearing further includes a retaining frame arranged between adjacent balls, and the retaining frame is arranged between the inner ring and the outer ring.

[0023] In the preferred technical solution of the above-mentioned motor bearing lubrication system, the bearing also includes a sealing ring, which is mounted on the outer wall of the bearing and abuts against the steel sleeve, and does not interfere with the communication between the oil inlet hole on the steel sleeve and the first oil storage tank and the oil inlet channel.

[0024] In the preferred technical solution of the above-mentioned motor bearing lubrication system, the motor bearing lubrication system also includes an end cover mounted on the motor shaft, the end cover is arranged on the outer side of the shell, and forms a second oil storage tank with the shell that is connected to the oil inlet channel.

[0025] In a second aspect, the present invention further provides a vehicle, comprising the motor bearing lubrication system of the above preferred technical solution.

[0026] It will be understood by those skilled in the art that the motor bearing lubrication system of the present invention includes a housing, a motor shaft, and a bearing; an oil inlet passage is provided on the housing; the motor shaft is disposed within the housing; the bearing is disposed within the housing and sleeved on the motor shaft, and a first oil reservoir is provided inside the bearing, the first oil reservoir being configured to communicate with the oil inlet passage. By providing a first oil reservoir inside the bearing that is connected to the oil inlet passage, lubricating oil can flow into the first oil reservoir to lubricate the components inside the bearing, and when the bearing is short of oil, the lubricating oil in the first oil reservoir can meet the normal operation of the bearing for a short period of time, ensuring normal starting of the vehicle; and can also play a certain role in cooling the bearing, thereby extending the life of the bearing.

[0027] Furthermore, the motor bearing lubrication system includes a steel sleeve disposed within the housing and adapted to receive the motor shaft. The inner wall of the steel sleeve and the outer wall of the motor shaft define a bearing chamber for receiving the bearing. The bearing chamber supports the bearing.

[0028] Furthermore, the motor bearing lubrication system includes a shoulder disposed on the steel sleeve. The shoulder extends toward the motor shaft. The shoulder, together with the steel sleeve and the motor shaft, forms a bearing chamber. A second gap, communicating with the first gap, exists between the shoulder and the bearing. The shoulder facilitates axial positioning of the bearing.

[0029] Furthermore, the distance between the side of the shoulder away from the motor shaft and the axis of the motor shaft is greater than the distance between the side of the oil outlet away from the motor shaft and the axis of the motor shaft, thereby preventing the lubricating oil from flowing out of the shoulder side.

[0030] Furthermore, the bearing further comprises a cage arranged between adjacent balls, the cage being arranged between the inner ring and the outer ring. The cage can separate the balls and reduce friction and wear between the balls.

[0031] The bearing further includes a sealing ring, which is mounted on the outer wall of the bearing and abuts the steel sleeve. The sealing ring does not interfere with the communication between the oil inlet hole in the steel sleeve and the first oil reservoir and the oil inlet channel. The abutment between the sealing ring and the steel sleeve prevents lubricating oil from escaping from the first gap, ensuring that the lubricating oil enters the first oil reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0033] FIG1 is a partial cross-sectional view of a motor bearing lubrication system according to the present invention;

[0034] FIG2 is a second partial cross-sectional view of the motor bearing lubrication system of the present invention;

[0035] FIG3 is a cross-sectional view of a bearing according to the present invention;

[0036] FIG4 is a second cross-sectional view of the bearing of the present invention.

[0037] Figure numerals: 1. Housing; 11. Oil inlet channel; 2. Motor shaft; 3. Bearing; 31. First oil storage tank; 32. Inner ring; 33. Outer ring; 34. Ball; 35. First oil deflector ring; 351. Oil outlet; 36. Second oil deflector ring; 361. Oil inlet; 37. Retaining frame; 38. Sealing ring; 4. Steel sleeve; 41. Oil inlet hole; 5. First gap; 6. Shoulder; 7. Second gap; 8. End cover; 9. Second oil storage tank. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0039] It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for ease of description and are not intended to indicate or imply that the device or component described must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "connect," "dispose," and "install" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] Based on the problem pointed out in the background technology that the vehicle cannot operate normally when the bearing is in an oil-deficient state, the present invention provides a motor bearing lubrication system, which includes a housing, a motor shaft and a bearing; an oil inlet channel is opened on the housing; the motor shaft is arranged in the housing; the bearing is arranged in the housing and sleeved on the motor shaft, and a first oil storage tank is provided inside the bearing, and the first oil storage tank is arranged to be connected to the oil inlet channel. By arranging the first oil storage tank connected to the oil inlet channel inside the bearing, the lubricating oil can flow into the first oil storage tank to lubricate the components inside the bearing, and when the bearing is in an oil-deficient state, the lubricating oil in the first oil storage tank can meet the normal operation of the bearing in a short period of time, ensuring the normal start of the vehicle; at the same time, it can also play a certain cooling role, thereby extending the life of the bearing.

[0042] First, the motor bearing lubrication system of the present invention will be described with reference to Figures 1 to 4. Figure 1 is a partial cross-sectional view of the motor bearing lubrication system of the present invention; Figure 2 is a partial cross-sectional view of the motor bearing lubrication system of the present invention; Figure 3 is a cross-sectional view of the bearing of the present invention; and Figure 4 is a cross-sectional view of the bearing of the present invention.

[0043] As shown in Figures 1 and 2, the motor bearing lubrication system of the present invention includes a housing 1, a motor shaft 2 and a bearing 3; an oil inlet channel 11 is opened on the housing 1; the motor shaft 2 is arranged in the housing 1; the bearing 3 is arranged in the housing 1 and sleeved on the motor shaft 2, and a first oil storage tank 31 is provided inside the bearing 3, and the first oil storage tank 31 is configured to be able to communicate with the oil inlet channel 11.

[0044] Preferably, the motor bearing lubrication system further includes a steel sleeve 4 disposed within the housing 1 and capable of inserting the motor shaft 2 therein. A bearing chamber is defined between the inner wall of the steel sleeve 4 and the outer wall of the motor shaft 2 to accommodate the bearing 3. The bearing 3 is disposed within the bearing chamber, which supports the bearing 3.

[0045] Preferably, an oil inlet hole 41 is formed on the steel sleeve 4 , and the oil inlet hole 41 can be communicated with the first oil storage tank 31 and the oil inlet channel 11 respectively.

[0046] It should be noted that the present application does not limit the size of the oil inlet hole 41, and those skilled in the art can flexibly adjust it according to actual product conditions. For example, the inner diameter of the oil inlet hole 41 is consistent with the inner diameter of the oil inlet channel 11.

[0047] In addition, the present application does not limit the shape of the oil inlet hole 41, and those skilled in the art can flexibly adjust it according to actual product conditions. For example, the oil inlet hole 41 is a circular hole.

[0048] Preferably, as shown in FIG. 2 , there is a first gap 5 between the bearing 3 and the steel sleeve 4 , and the first gap 5 is communicated with the first oil storage tank 31 and the oil inlet hole 41 , respectively.

[0049] Specifically, the first gap 5 refers to the gap between the steel sleeve 4 and the outer side of the bearing 3, and the first gap 5 is in a straight line shape.

[0050] It is understandable that the size of the first gap 5 is not fixed in the present application, as long as the first oil storage tank 31 and the oil inlet hole 41 can be connected. For example, the first gap 5 is 0.05 mm.

[0051] As shown in Figure 2 , the motor bearing lubrication system also includes a shoulder 6 disposed on the steel sleeve 4. The shoulder 6 extends toward the motor shaft 2 (downward in Figure 2 ). Together with the steel sleeve 4 and the motor shaft 2, the shoulder 6 forms a bearing chamber. A second gap 7 communicating with the first gap 5 exists between the shoulder 6 and the bearing 3. The provision of the shoulder 6 enables axial positioning of the bearing 3.

[0052] Preferably, the shoulder 6 and the steel sleeve 4 are integrally formed. The integrally formed structure facilitates the processing and production of the mold and can improve the overall strength of the steel sleeve 4.

[0053] Specifically, the second gap 7 refers to the gap between the shoulder 6 and the left side of the bearing (such as the left side in FIG. 2 ), and the second gap 7 is in a straight line shape.

[0054] It should be noted that the size of the second gap 7 is not fixed in the present application, as long as it can be connected to the first gap 5. For example, the second gap 7 is 0.05 mm.

[0055] It should be noted that the height of the shoulder 6 in the present application is not fixed, and those skilled in the art can flexibly adjust it according to actual product conditions.

[0056] In a preferred embodiment, as shown in Figure 3 (wherein the arrows in Figure 3 indicate the flow direction of the lubricating oil in the first oil storage tank 31), the bearing 3 includes an inner ring 32, an outer ring 33, balls 34 and a first oil detent ring 35. The inner ring 32 is sleeved on the motor shaft 2 and arranged in the outer ring 33; the balls 34 are arranged between the inner ring 32 and the outer ring 33; the first oil detent ring 35 is arranged on the side of the bearing 3 away from the shoulder 6 (such as the right side in Figure 3), and is arranged between the inner ring 32 and the outer ring 33; the outer ring 33, the first oil detent ring 35, the balls 34 and the shoulder 6 are arranged to form the first oil storage tank 31.

[0057] It should be noted that the material of the ball 34 is not fixed in this application, and those skilled in the art can flexibly adjust it according to the actual product conditions. For example, the ball 34 is made of steel.

[0058] Preferably, an oil outlet 351 is formed on the first oil deflector ring 35 , and the oil outlet 351 is communicated with the first oil storage tank 31 .

[0059] Preferably, the oil outlet 351 is an annular structure provided along the extension direction of the first oil deflector ring 35 and surrounding the inner ring 32 .

[0060] Alternatively, the oil outlet 351 may also be a plurality of hole-shaped structures distributed at intervals along the extension direction of the first oil deflector ring 35 and around the inner ring 32 .

[0061] Preferably, the distance between the side of the shoulder 6 away from the motor shaft 2 (such as the upper side in Figure 2) and the axis of the motor shaft 2 is greater than the distance between the side of the oil outlet 351 away from the motor shaft 2 (such as the upper side in Figure 3) and the axis of the motor shaft 2, so as to prevent the lubricating oil from flowing out from the side of the shoulder 6.

[0062] It should be noted that the size of the oil outlet 351 is not fixed in this application. As long as the distance between the side of the oil outlet 351 away from the motor shaft 2 and the axis of the motor shaft 2 is less than the distance between the side of the shoulder 6 away from the motor shaft 2 and the axis of the motor shaft 2 and the oil flow requirement can be met, technical personnel in this field can flexibly adjust it according to actual product conditions.

[0063] In this embodiment, as shown in Figure 3, the lubricating oil flows into the oil inlet channel 11, enters the bearing chamber through the oil inlet hole 41 on the steel sleeve 4, flows through the first gap 5 and the second gap 7, and then flows into the first oil storage tank 31 to lubricate the inside of the bearing 3, and finally flows out through the oil outlet 351.

[0064] In another possible embodiment, as shown in Figure 4 (wherein the arrow in Figure 4 indicates the flow direction of the lubricating oil in the first oil storage tank 31), the bearing 3 also includes a second oil deflector ring 36 arranged on the side of the bearing 3 close to the shoulder 6 (such as the left side in Figure 4), and the second oil deflector ring 36 is arranged between the inner ring 32 and the outer ring 33, and is provided with an oil inlet 361, which is connected to the first oil storage tank 31.

[0065] Preferably, the oil inlet 361 is an annular structure provided along the extension direction of the second oil deflector ring 36 and surrounding the inner ring 32 .

[0066] Alternatively, the oil inlet 361 may also be a plurality of hole-shaped structures distributed at intervals along the extension direction of the second oil deflector ring 36 and around the inner ring 32 .

[0067] Preferably, the distance between the side of the shoulder 6 away from the motor shaft 2 and the axis of the motor shaft 2 is greater than the distance between the side of the oil inlet 361 away from the motor shaft 2 (such as the upper side in FIG. 4 ) and the axis of the motor shaft 2 .

[0068] It should be noted that the size of the oil inlet 361 is not fixed in this application. As long as the distance between the side of the oil inlet 361 away from the motor shaft 2 and the axis of the motor shaft 2 is less than the distance between the side of the shoulder 6 away from the motor shaft 2 and the axis of the motor shaft 2 and the oil flow requirement can be met, technical personnel in this field can flexibly adjust it according to actual product conditions.

[0069] In this embodiment, as shown in Figure 4, the lubricating oil flows into the oil inlet channel 11, enters the bearing chamber through the oil inlet hole 41 on the steel sleeve 4, flows through the first gap 5 and the second gap 7, and then flows into the first oil storage tank 31 through the oil inlet port 361 on the second oil deflector ring 36 to lubricate the inside of the bearing 3, and finally flows out through the oil outlet port 351.

[0070] As shown in Figures 3 and 4, the bearing 3 further includes a retainer 37 disposed between adjacent balls 34. The retainer 37 is disposed between the inner ring 32 and the outer ring 33. The retainer 37 can separate the balls 34 and reduce friction and wear between the balls 34.

[0071] Preferably, there is a gap between the ball 34 and the retaining frame 37, which can reduce the wear between the ball 34 and the retaining frame 37; the lubricating oil on both sides of the ball 34 in the first oil storage tank 31 can be connected through the rotation of the ball 34, and the lubricating oil can also lubricate the ball 34 in all directions.

[0072] Preferably, there is a gap between the retaining frame 37 and the outer ring 33 of the bearing 3 , so that the lubricating oil can flow smoothly into the first oil storage tank 31 .

[0073] Preferably, as shown in Figures 3 and 4 , the bearing 3 further includes a sealing ring 38. The sealing ring 38 is sleeved on the outer wall of the bearing 3 and abuts the steel sleeve 4. The sealing ring 38 does not interfere with the communication between the oil inlet hole 41 in the steel sleeve 4 and the first oil reservoir 31 and the oil inlet channel 11. The abutment between the sealing ring 38 and the steel sleeve 4 prevents the lubricating oil from flowing out of the first gap 5, ensuring that the lubricating oil enters the first oil reservoir 31.

[0074] Specifically, the sealing ring 38 is sleeved in the groove of the outer ring 33 of the bearing 3 and abuts against the steel sleeve 4. The sealing ring 38 is located on the right side of the oil inlet hole 41 (as shown on the right side in Figure 2) so that the oil inlet hole 41 is connected to the first oil storage tank 31 and the oil inlet channel 11.

[0075] It should be noted that the present application does not limit the material of the sealing ring 38, and those skilled in the art can flexibly adjust it according to actual conditions. For example, the material of the sealing ring 38 is rubber.

[0076] As shown in Figure 1, the motor bearing lubrication system also includes an end cover 8 mounted on the motor shaft 2. The end cover 8 is arranged on the outer side of the housing 1 (such as the left side in Figure 1) and forms a second oil storage tank 9 with the housing 1 that is connected to the oil inlet channel 11.

[0077] In addition, the present invention also discloses a vehicle, which includes the bearing lubrication system described in any of the aforementioned solutions and has all the above technical effects, which will not be repeated here.

[0078] The vehicle may be an electric vehicle, a hybrid vehicle, a gasoline vehicle or other vehicles, which are not listed here one by one.

[0079] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A motor bearing lubrication system, characterized in that: The motor bearing lubrication system comprises: A housing having an oil inlet passage formed thereon; a motor shaft, the motor shaft being disposed in the housing; A bearing is arranged in the housing and sleeved on the motor shaft. A first oil storage tank is provided inside the bearing. The first oil storage tank is arranged to be able to communicate with the oil inlet channel.

2. The motor bearing lubrication system according to claim 1, characterized in that: The motor bearing lubrication system further comprises a steel sleeve disposed in the housing and capable of inserting the motor shaft therein, wherein a bearing chamber capable of installing the bearing is formed between the inner wall of the steel sleeve and the outer wall of the motor shaft; The steel sleeve is provided with an oil inlet hole, and the oil inlet hole can be communicated with the first oil storage tank and the oil inlet channel respectively.

3. The motor bearing lubrication system according to claim 2, characterized in that: There is a first gap between the bearing and the steel sleeve, and the first gap is communicated with the first oil storage tank and the oil inlet hole respectively.

4. The motor bearing lubrication system according to claim 3, characterized in that: The motor bearing lubrication system also includes a shoulder disposed on the steel sleeve, the shoulder extending in a direction close to the motor shaft, the shoulder, the steel sleeve and the motor shaft together form the bearing chamber, and a second gap connected to the first gap exists between the shoulder and the bearing.

5. The motor bearing lubrication system according to claim 4, characterized in that: The bearing comprises an inner ring, an outer ring, balls and a first oil deflector ring, wherein the inner ring is sleeved on the motor shaft and arranged in the outer ring; the balls are arranged between the inner ring and the outer ring; the first oil deflector ring is arranged on a side of the bearing away from the shoulder and arranged between the inner ring and the outer ring; The outer ring, the first oil retaining ring, the ball and the retaining shoulder are arranged to form the first oil storage groove.

6. The motor bearing lubrication system according to claim 5, characterized in that: The first oil deflector ring is provided with an oil outlet, and the oil outlet is communicated with the first oil storage tank.

7. The motor bearing lubrication system according to claim 6, characterized in that: The distance between the side of the shoulder away from the motor shaft and the axis of the motor shaft is greater than the distance between the side of the oil outlet away from the motor shaft and the axis of the motor shaft.

8. The motor bearing lubrication system according to claim 5, characterized in that: The bearing further comprises a second oil deflector ring arranged on a side of the bearing close to the shoulder, the second oil deflector ring being arranged between the inner ring and the outer ring and having an oil inlet opened thereon, the oil inlet being connected to the first oil storage tank.

9. The motor bearing lubrication system according to claim 8, characterized in that: The distance between the side of the shoulder away from the motor shaft and the axis of the motor shaft is greater than the distance between the side of the oil inlet away from the motor shaft and the axis of the motor shaft.

10. The motor bearing lubrication system according to claim 5, characterized in that: The bearing further comprises a retaining frame arranged between adjacent balls, wherein the retaining frame is arranged between the inner ring and the outer ring.

11. The motor bearing lubrication system according to claim 2, characterized in that: The bearing further comprises a sealing ring, which is sleeved on the outer wall of the bearing and abuts against the steel sleeve and does not interfere with the communication between the oil inlet hole on the steel sleeve and the first oil storage tank and the oil inlet channel.

12. The motor bearing lubrication system according to claim 1, characterized in that: The motor bearing lubrication system further comprises an end cover sleeved on the motor shaft, wherein the end cover is arranged on one side outside the housing and forms a second oil storage tank connected to the oil inlet channel with the housing.

13. A vehicle, characterized in that: The vehicle comprises the motor bearing lubrication system according to any one of claims 1 to 12 above.

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