CN221097218U

CN221097218U - Motor bearing lubrication system and vehicle

Info

Publication number: CN221097218U
Application number: CN202323344123.0U
Authority: CN
Inventors: 李海锋; 任传委; 刘洋; 刘代志
Original assignee: Weilai Power Technology Hefei Co Ltd
Current assignee: Weilai Power Technology Hefei Co Ltd
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-06-07
Anticipated expiration: 2033-12-04

Abstract

The utility model relates to the technical field of bearing lubrication, in particular to a motor bearing lubrication system and a vehicle, and aims to solve the problem that the vehicle cannot normally operate due to the fact that a bearing is in an oil shortage state. To this end, the motor bearing lubrication system of the present utility model comprises a housing, a motor shaft and a bearing; an oil inlet channel is formed in the shell; the motor shaft is arranged in the shell; the bearing is arranged in the shell and sleeved on the motor shaft, a first oil storage groove is formed in the bearing, and the first oil storage groove is arranged to be capable of being communicated with the oil inlet channel. The first oil storage groove communicated with the oil inlet channel is arranged in the bearing, so that lubricating oil can flow into the first oil storage groove to lubricate components in the bearing, and when the bearing is in an oil shortage state, the lubricating oil in the first oil storage groove can meet the normal operation of the bearing in a short time, so that the normal starting of a vehicle is ensured; meanwhile, the device can play a certain role in cooling and prolong the service life of the bearing.

Description

Motor bearing lubrication system and vehicle

Technical Field

The utility model relates to the technical field of bearing lubrication, and particularly provides a motor bearing lubrication system and a vehicle.

Background

In order to meet the trend of high-speed operation of an electric drive system, more and more motors are cooled by adopting an oil cooling mode, and compared with the traditional water cooling mode, the oil cooling heat dissipation effect is better; and the lubricating oil cools the motor, and part of the lubricating oil also lubricates and cools the bearing, so that the limit rotating speed of the motor is further improved.

In an oil-cooled motor, a non-driving end bearing is often actively lubricated by adopting an oil pump oil supply mode, but the lubrication mode has a plurality of problems. For example, in the case of failure of the active lubrication pump or restarting after a long stop at a low temperature, the bearing may be in an oil-starved state, which may cause the bearing to fail to operate normally, with a certain risk.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

Disclosure of utility model

The utility model aims to solve the technical problems, namely the problem that the vehicle cannot normally run due to the fact that the bearing is in an oil shortage state.

The utility model provides a motor bearing lubrication system, comprising:

the shell is provided with an oil inlet channel;

a motor shaft disposed within the housing;

The bearing is arranged in the shell and sleeved on the motor shaft, a first oil storage tank is arranged in the bearing, and the first oil storage tank is arranged to be communicated with the oil inlet channel.

In the above preferred technical solution of the motor bearing lubrication system, the motor bearing lubrication system further includes a steel sleeve disposed in the housing and capable of enabling the motor shaft to be inserted therein, and a bearing chamber capable of mounting the bearing is defined between an inner wall of the steel sleeve and an outer wall of the motor shaft;

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

In the preferable technical scheme of the motor bearing lubrication system, a first gap exists between the bearing and the steel sleeve, and the first gap is respectively communicated with the first oil storage tank and the oil inlet hole.

In the preferred technical scheme of the motor bearing lubrication system, the motor bearing lubrication system further comprises a shoulder arranged on the steel sleeve, the shoulder extends towards the direction close to the motor shaft, the shoulder, the steel sleeve and the motor shaft jointly form the bearing chamber, and a second gap communicated with the first gap exists between the shoulder and the bearing.

In the preferable technical scheme of the motor bearing lubrication system, the bearing comprises an inner ring, an outer ring, balls and a first oil baffle ring, wherein the inner ring is sleeved on the motor shaft and is arranged in the outer ring; the ball is arranged between the inner ring and the outer ring, and the first oil baffle ring is arranged on one side of the bearing away from the baffle shoulder and is arranged between the inner ring and the outer ring;

the outer ring, the first oil retaining ring, the balls and the shoulder are surrounded to form the first oil storage groove.

In the preferable technical scheme of the motor bearing lubrication system, an oil outlet is formed in the first oil baffle ring, and the oil outlet is communicated with the first oil storage tank.

In the preferable technical scheme of the motor bearing lubrication system, the distance between the side, away from the motor shaft, of the shoulder and the motor shaft axis is greater than the distance between the side, away from the motor shaft, of the oil outlet and the motor shaft axis.

In the preferable technical scheme of the motor bearing lubrication system, the bearing further comprises a second oil baffle ring arranged on one side of the bearing close to the shoulder, the second oil baffle ring is arranged between the inner ring and the outer ring, an oil inlet is formed in the second oil baffle ring, and the oil inlet is communicated with the first oil storage tank.

In the preferable technical scheme of the motor bearing lubrication system, the distance between the side, away from the motor shaft, of the shoulder and the motor shaft axis is greater than the distance between the side, away from the motor shaft, of the oil inlet and the motor shaft axis.

In a preferred embodiment of the above motor bearing lubrication system, the bearing further includes a cage disposed between adjacent balls, the cage being disposed between the inner ring and the outer ring.

In the preferred technical scheme of the motor bearing lubrication system, the bearing further comprises a sealing ring, the sealing ring is sleeved on the outer wall of the bearing and is in butt joint with the steel sleeve, and the oil inlet hole on the steel sleeve is not interfered with the first oil storage tank and the oil inlet channel.

In the above preferred technical solution of the motor bearing lubrication system, the motor bearing lubrication system further includes an end cover sleeved on the motor shaft, the end cover is disposed on one side outside the housing, and forms a second oil storage tank with the housing and communicated with the oil inlet channel.

In a second aspect, the present utility model also provides a vehicle comprising the motor bearing lubrication system of the preferred embodiment described above.

Scheme 1. A motor bearing lubrication system, its characterized in that, motor bearing lubrication system includes:

the shell is provided with an oil inlet channel;

a motor shaft disposed within the housing;

The motor bearing lubrication system according to the scheme 1 is characterized by further comprising a steel sleeve which is arranged in the shell and can enable the motor shaft to be inserted into the steel sleeve, 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 in a surrounding mode;

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

The motor bearing lubrication system according to claim 3, further comprising a shoulder disposed on the steel sleeve, the shoulder extending in a direction toward the motor shaft, the shoulder, the steel sleeve, and the motor shaft together forming the bearing chamber, and a second gap communicating with the first gap is present between the shoulder and the bearing.

The motor bearing lubrication system according to the scheme 4, wherein the bearing comprises an inner ring, an outer ring, balls and a first oil baffle ring, and the inner ring is sleeved on the motor shaft and is arranged in the outer ring; the ball is arranged between the inner ring and the outer ring, and the first oil baffle ring is arranged on one side of the bearing away from the baffle shoulder and is arranged between the inner ring and the outer ring;

The motor bearing lubrication system according to the scheme 5 is characterized in that an oil outlet is formed in the first oil baffle ring, and the oil outlet is communicated with the first oil storage tank.

The motor bearing lubrication system according to claim 6, wherein a distance between a side of the shoulder away from the motor shaft and the motor shaft axis is greater than a distance between a side of the oil outlet away from the motor shaft and the motor shaft axis.

The motor bearing lubrication system according to the scheme 8 is characterized in that the bearing further comprises a second oil retainer arranged on one side of the bearing close to the shoulder, the second oil retainer is arranged between the inner ring and the outer ring, an oil inlet is formed in the second oil retainer, and the oil inlet is communicated with the first oil storage tank.

The motor bearing lubrication system according to claim 8, wherein a distance between a side of the shoulder away from the motor shaft and the motor shaft axis is greater than a distance between a side of the oil inlet away from the motor shaft and the motor shaft axis.

The motor bearing lubrication system according to claim 5, wherein the bearing further includes a cage disposed between adjacent balls, the cage being disposed between the inner race and the outer race.

The motor bearing lubrication system according to the scheme 11 is characterized in that the bearing further comprises a sealing ring, wherein the sealing ring is sleeved on the outer wall of the bearing and is abutted against the steel sleeve, and the oil inlet hole on the steel sleeve is not interfered with the communication between the first oil storage tank and the oil inlet channel.

The motor bearing lubrication system according to claim 1, further comprising an end cover sleeved on the motor shaft, wherein the end cover is disposed on an outer side of the housing, and forms a second oil reservoir with the housing, the second oil reservoir communicating with the oil inlet channel.

A vehicle comprising the motor bearing lubrication system according to any one of the above aspects 1 to 12.

As will be appreciated by those skilled in the art, the motor bearing lubrication system of the present utility model includes a housing, a motor shaft, and a bearing; an oil inlet channel is formed in the shell; the motor shaft is arranged in the shell; the bearing is arranged in the shell and sleeved on the motor shaft, a first oil storage groove is formed in the bearing, and the first oil storage groove is arranged to be capable of being communicated with the oil inlet channel. The first oil storage groove communicated with the oil inlet channel is arranged in the bearing, so that lubricating oil can flow into the first oil storage groove to lubricate components in the bearing, and when the bearing is in an oil shortage state, the lubricating oil in the first oil storage groove can meet the normal operation of the bearing in a short time, so that the normal starting of a vehicle is ensured; meanwhile, the device can play a certain role in cooling and prolong the service life of the bearing.

Further, the motor bearing lubrication system further comprises a steel sleeve which is arranged in the shell and can enable the motor shaft to be inserted into the steel sleeve, and a bearing chamber which can be used for installing a bearing is formed between the inner wall of the steel sleeve and the outer wall of the motor shaft in a surrounding mode. The bearing is arranged in the bearing chamber, and the bearing chamber can play a supporting role on the bearing.

Further, the motor bearing lubrication system further comprises a stop shoulder arranged on the steel sleeve, the stop shoulder extends towards the direction close to the motor shaft, the stop shoulder, the steel sleeve and the motor shaft jointly form a bearing chamber, and a second gap communicated with the first gap exists between the stop shoulder and the bearing. The arrangement of the stop shoulder can axially position the bearing.

Further, the distance between the side of the retaining shoulder far away from the motor shaft and the motor shaft axis is larger than the distance between the side of the oil outlet far away from the motor shaft and the motor shaft axis, so that lubricating oil is prevented from flowing out of the retaining shoulder.

Further, 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 space the balls apart, reducing friction and wear between the balls.

Further, the bearing further comprises a sealing ring sleeved on the outer wall of the bearing and abutted against the steel sleeve, and the oil inlet hole on the steel sleeve is not interfered to be communicated with the first oil storage tank and the oil inlet channel. The sealing ring is abutted against the steel sleeve, so that lubricating oil can be prevented from flowing out of the first gap, and the lubricating oil is ensured to enter the first oil storage tank.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a partial cross-sectional view of a motor bearing lubrication system of the present utility model;

FIG. 2 is a partial cross-sectional view of a motor bearing lubrication system of the present utility model;

FIG. 3 is a cross-sectional view of a bearing of the present utility model;

Fig. 4 is a second cross-sectional view of the bearing of the present utility model.

Reference numerals:

1. A housing; 11. an oil inlet passage; 2. a motor shaft; 3. a bearing; 31. a first oil reservoir; 32. an inner ring; 33. an outer ring; 34. a ball; 35. a first oil deflector; 351. an oil outlet; 36. a second oil baffle ring; 361. an oil inlet; 37. a retainer; 38. a seal ring; 4. a steel sleeve; 41. an oil inlet hole; 5. a first gap; 6. a shoulder; 7. a second gap; 8. an end cap; 9. and a second oil storage tank.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "disposed," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically, directly, or indirectly via an intermediary. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

The problem that the vehicle cannot normally run when the bearing is in an oil-deficient state based on the background technology; the utility model provides a motor bearing lubrication system, which comprises a shell, a motor shaft and a bearing; an oil inlet channel is formed in the shell; the motor shaft is arranged in the shell; the bearing is arranged in the shell and sleeved on the motor shaft, a first oil storage groove is formed in the bearing, and the first oil storage groove is arranged to be capable of being communicated with the oil inlet channel. The first oil storage groove communicated with the oil inlet channel is arranged in the bearing, so that lubricating oil can flow into the first oil storage groove to lubricate components in the bearing, and when the bearing is in an oil shortage state, the lubricating oil in the first oil storage groove can meet the normal operation of the bearing in a short time, so that the normal starting of a vehicle is ensured; meanwhile, the device can play a certain role in cooling and prolong the service life of the bearing.

First, a motor bearing lubrication system of the present utility model will be described with reference to fig. 1 to 4. Wherein FIG. 1 is a partial cross-sectional view of a motor bearing lubrication system of the present utility model; FIG. 2 is a partial cross-sectional view of a motor bearing lubrication system of the present utility model; FIG. 3 is a cross-sectional view of a bearing of the present utility model; fig. 4 is a second cross-sectional view of the bearing of the present utility model.

As shown in fig. 1 and 2, the motor bearing lubrication system of the present utility model includes a housing 1, a motor shaft 2, and a bearing 3; the shell 1 is provided with an oil inlet channel 11; the motor shaft 2 is arranged in the shell 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 arranged in the bearing 3, and the first oil storage tank 31 is arranged to be capable of communicating with the oil inlet channel 11.

Preferably, the motor bearing lubrication system further comprises a steel sleeve 4 which is arranged in the shell 1 and can enable the motor shaft 2 to be inserted into the steel sleeve, and a bearing chamber capable of installing the bearing 3 is formed between the inner wall of the steel sleeve 4 and the outer wall of the motor shaft 2 in a surrounding mode. The bearing 3 is arranged in a bearing chamber, and the bearing chamber can play a supporting role on the bearing 3.

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

It should be noted that the size of the oil inlet 41 is not limited in the present application, and those skilled in the art can flexibly adjust the size according to the actual product situation. For example, the inner diameter of the oil inlet hole 41 is identical to the inner diameter of the oil inlet passage 11.

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

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

Specifically, the first gap 5 refers to a gap between the steel sleeve 4 and the outside of the bearing 3, and the first gap 5 is linear.

It will be appreciated that the size of the first gap 5 is not necessarily constant, as long as the first oil reservoir 31 and the oil inlet 41 can be communicated. For example, the first gap 5 is 0.05mm.

As shown in fig. 2, the motor bearing lubrication system further comprises a shoulder 6 arranged on the steel sleeve 4, the shoulder 6 extends towards the direction (lower part in fig. 2) close to the motor shaft 2, the shoulder 6, the steel sleeve 4 and the motor shaft 2 together form a bearing chamber, and a second gap 7 communicated with the first gap 5 exists between the bearing 3. The arrangement of the shoulder 6 enables the bearing 3 to be positioned axially.

Preferably, the shoulder 6 and the steel sleeve 4 are integrally formed, and the integrally formed structure is convenient for processing and manufacturing of a die and can improve the integral strength of the steel sleeve 4.

Specifically, the second gap 7 refers to a gap between the shoulder 6 and the left side of the bearing (e.g., the left side in fig. 2), and the second gap 7 is linear.

It should be noted that the size of the second gap 7 is not necessarily constant, as long as it is able to communicate with the first gap 5. For example, the second gap 7 is 0.05mm.

It should be noted that the height of the shoulder 6 is not constant, and can be flexibly adjusted by a person skilled in the art according to the actual product situation.

In a preferred embodiment, as shown in fig. 3 (wherein, in fig. 3, the arrow indicates the flow direction of the lubricating oil in the first oil reservoir 31), the bearing 3 includes an inner ring 32, an outer ring 33, balls 34 and a first oil deflector 35, and the inner ring 32 is sleeved on the motor shaft 2 and is disposed in the outer ring 33; the balls 34 are arranged between the inner ring 32 and the outer ring 33, and the first oil deflector 35 is arranged on one side (right side in fig. 3) of the bearing 3 away from the shoulder 6 and between the inner ring 32 and the outer ring 33; the outer race 33, the first oil deflector 35, the balls 34, and the shoulder 6 are surrounded to form a first oil reservoir 31.

It should be noted that the material of the ball 34 is not fixed in the present application, and those skilled in the art can flexibly adjust the material according to the actual product situation. For example, the balls 34 are steel.

Preferably, the first oil baffle 35 is provided with an oil outlet 351, and the oil outlet 351 is communicated with the first oil storage tank 31.

Preferably, the oil outlet 351 is an annular structure formed along the extending direction of the first oil baffle 35 and surrounding the inner ring 32.

Alternatively, the oil outlet 351 may also be a plurality of hole structures distributed at intervals along the extending direction of the first oil baffle 35 and surrounding the inner ring 32.

Preferably, the distance between the side of the shoulder 6 away from the motor shaft 2 (upper side in fig. 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 (upper side in fig. 3) and the axis of the motor shaft 2, preventing the lubricant from flowing out of the shoulder 6 side.

It should be noted that the size of the oil outlet 351 is not fixed in the application, so long as the distance between the side of the oil outlet 351 far from the motor shaft 2 and the axis of the motor shaft 2 is smaller than the distance between the side of the shoulder 6 far from the motor shaft 2 and the axis of the motor shaft 2, and the oil passing requirement can be met, and the person skilled in the art can flexibly adjust according to the actual product situation.

In this embodiment, as shown in fig. 3, the lubricating oil flows in from the oil inlet passage 11, enters the bearing chamber through the oil inlet hole 41 in the steel sleeve 4, flows through the first gap 5 and the second gap 7, flows into the first oil storage tank 31 again to lubricate the inside of the bearing 3, and finally flows out through the oil outlet 351.

In another possible embodiment, as shown in fig. 4 (in which, in fig. 4, the arrow indicates the flow direction of the lubricating oil in the first oil storage tank 31), the bearing 3 further includes a second oil baffle ring 36 disposed on a side (e.g., left side in fig. 4) of the bearing 3 near the shoulder 6, the second oil baffle ring 36 is disposed between the inner ring 32 and the outer ring 33, and an oil inlet 361 is formed thereon, and the oil inlet 361 communicates with the first oil storage tank 31.

Preferably, the oil inlet 361 is an annular structure formed along the extending direction of the second oil deflector 36 and surrounding the inner ring 32.

Alternatively, the oil inlet 361 may also be a plurality of hole structures distributed along the extending direction of the second oil deflector 36 and surrounding the inner ring 32 at intervals.

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 (upper side in fig. 4) and the axis of the motor shaft 2.

It should be noted that the size of the oil inlet 361 is not fixed in the application, so long as the distance between the side of the oil inlet 361 far away from the motor shaft 2 and the axis of the motor shaft 2 is smaller than the distance between the side of the shoulder 6 far away from the motor shaft 2 and the axis of the motor shaft 2 and the oil passing requirement can be satisfied, and the size of the oil inlet 361 can be flexibly adjusted according to actual product conditions by a person skilled in the art.

In this embodiment, as shown in fig. 4, the lubricating oil flows in from 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, flows into the first oil storage tank 31 through the oil inlet 361 on the second oil baffle ring 36 to lubricate the inside of the bearing 3, and finally flows out through the oil outlet 351.

As shown in fig. 3 and 4, the bearing 3 further includes a cage 37 provided between the adjacent balls 34, the cage 37 being provided between the inner race 32 and the outer race 33. The cage 37 can space the balls 34 apart, reducing friction and wear between the balls 34.

Preferably, a clearance is formed between the balls 34 and the cage 37, so that abrasion between the balls 34 and the cage 37 can be reduced; the lubrication oil on both sides of the balls 34 in the first oil reservoir 31 can be communicated by the rotation of the balls 34, and at the same time, the lubrication oil can be used to lubricate the balls 34 in all directions.

Preferably, a gap exists between the retainer 37 and the outer race 33 of the bearing 3 so that the lubricating oil can smoothly flow into the first oil reservoir 31.

Preferably, as shown in fig. 3 and 4, the bearing 3 further comprises a sealing ring 38, and the sealing ring 38 is sleeved on the outer wall of the bearing 3 and is abutted against the steel sleeve 4, and the oil inlet hole 41 on the steel sleeve 4 is not interfered to communicate with the first oil storage groove 31 and the oil inlet channel 11. The seal ring 38 abuts against the steel bushing 4 to prevent the lubricant from flowing out of the first gap 5, and ensure that the lubricant enters the first oil reservoir 31.

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, and the sealing ring 38 is located on the right side (right side in fig. 2) of the oil inlet hole 41, so that the oil inlet hole 41 is communicated with the first oil storage groove 31 and the oil inlet channel 11.

It should be noted that the material of the sealing ring 38 is not limited in the present application, and those skilled in the art can flexibly adjust the material according to the actual situation. For example, the seal ring 38 is made of rubber.

As shown in fig. 1, the motor bearing lubrication system further includes an end cover 8 sleeved on the motor shaft 2, the end cover 8 is disposed on one side (left side in fig. 1) outside the housing 1, and a second oil reservoir 9 communicating with the oil inlet passage 11 is formed with the housing 1.

In addition, the utility model also discloses a vehicle, which comprises the bearing lubrication system according to any one of the above schemes, and has all the technical effects, and the description is omitted here.

The vehicle may be another vehicle such as an electric vehicle, a hybrid vehicle, or a gasoline vehicle, and is not specifically shown here.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims

1. A motor bearing lubrication system, the motor bearing lubrication system comprising:

the shell is provided with an oil inlet channel;

a motor shaft disposed within the housing;

2. The motor bearing lubrication system of claim 1, further comprising a steel sleeve disposed within the housing and configured to allow the motor shaft to be inserted therein, an inner wall of the steel sleeve and an outer wall of the motor shaft enclosing a bearing chamber configured to mount the bearing;

3. The motor bearing lubrication system of claim 2, wherein a first gap exists between the bearing and the steel sleeve, the first gap being in communication with the first oil reservoir and the oil inlet hole, respectively.

4. The motor bearing lubrication system of claim 3, further comprising a shoulder disposed on the steel sleeve, the shoulder extending in a direction proximate the motor shaft, the shoulder, together with the steel sleeve and the motor shaft, forming the bearing chamber and having a second gap in communication with the first gap with the bearing.

5. The motor bearing lubrication system of claim 4, wherein the bearing comprises an inner race, an outer race, balls, and a first oil deflector, the inner race being sleeved on the motor shaft and disposed in the outer race; the ball is arranged between the inner ring and the outer ring, and the first oil baffle ring is arranged on one side of the bearing away from the baffle shoulder and is arranged between the inner ring and the outer ring;

6. The motor bearing lubrication system of claim 5, wherein an oil outlet is provided on the first oil deflector, and the oil outlet is in communication with the first oil reservoir.

7. The motor bearing lubrication system of claim 6, wherein a distance between a side of the shoulder away from the motor shaft and the motor shaft axis is greater than a distance between a side of the oil outlet away from the motor shaft and the motor shaft axis.

8. The motor bearing lubrication system of claim 5, wherein the bearing further comprises a second oil retainer disposed on a side of the bearing adjacent to the shoulder, the second oil retainer disposed between the inner race and the outer race and having an oil inlet formed thereon, the oil inlet in communication with the first oil reservoir.

9. The motor bearing lubrication system of claim 8, wherein a distance between a side of the shoulder remote from the motor shaft and the motor shaft axis is greater than a distance between a side of the oil inlet remote from the motor shaft and the motor shaft axis.

10. The motor bearing lubrication system of claim 5, wherein the bearing further comprises a cage disposed between adjacent balls, the cage disposed between the inner race and the outer race.

11. The motor bearing lubrication system of claim 2, wherein the bearing further comprises a seal ring sleeved on an outer wall of the bearing and abutting the steel sleeve without interfering with communication of the oil inlet hole on the steel sleeve with the first oil reservoir and the oil inlet channel.

12. The motor bearing lubrication system of claim 1, further comprising an end cap over the motor shaft, the end cap being disposed on an outer side of the housing and forming a second oil reservoir with the housing in communication with the oil inlet passage.

13. A vehicle, characterized in that it comprises a motor bearing lubrication system according to any of the preceding claims 1-12.