CN215861346U

CN215861346U - Bearing oil lubricating structure

Info

Publication number: CN215861346U
Application number: CN202121025765.2U
Authority: CN
Inventors: 于萍萍; 朱宽宁; 张明杰; 马春凤
Original assignee: Suzhou Lego Motors Co ltd
Current assignee: Suzhou Lego Motors Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2022-02-18
Anticipated expiration: 2031-05-13

Abstract

A bearing oil lubricating structure comprises a rotating shaft, a bearing, a motor end cover, a bearing end cover and a lubricating oil cavity, wherein one end of the motor end cover is fixedly connected with the bearing end cover; the end part of the rotating shaft is provided with an oil inlet hole, the oil inlet hole extends inwards along the axial direction of the rotating shaft, the axial surface of the rotating shaft is provided with an oil throwing hole, the oil throwing hole extends inwards along the radial direction of the rotating shaft and is communicated with the oil inlet hole, a rotating shaft retaining shoulder is arranged on the rotating shaft at one side of the bearing far away from the lubricating oil cavity, the rotating shaft retaining shoulder is a first shaft shoulder with a step-shaped conical surface, and the conical surface step on the first shaft shoulder is arranged towards the bearing; the problem of among the prior art, the bearing lubrication of motor adopts fat lubrication, heats seriously under the high-speed, high load's application operating mode, can lead to the grease to spill over, leads to the bearing life not to satisfy the design life that the whole car factory required the motor is solved.

Description

Bearing oil lubricating structure

Technical Field

The utility model relates to the technical field of new energy automobile motors, in particular to a bearing oil lubricating structure.

Background

With the continuous development of new energy automobile technology, the requirements on the driving motor are higher and higher, including the continuous improvement of the rotating speed and the torque and the design life, so that the requirements of the motor on the bearing are higher and higher.

In the prior art, the bearing lubrication of the motor generally adopts grease lubrication, and the grease is seriously heated under the application working conditions of high speed and high load, so that the grease is overflowed, and the service life of the bearing cannot meet the design service life required by a whole vehicle factory for the motor.

In view of the above, it is an object of the present invention to overcome the above-mentioned shortcomings by designing a bearing lubrication structure capable of improving the life of a motor bearing.

Disclosure of Invention

The utility model provides a bearing oil lubrication structure, and aims to solve the problem that grease is overflowed due to serious heating under the application working conditions of high speed and high load when the bearing lubrication of a motor is generally performed by grease lubrication, so that the service life of a bearing cannot meet the design service life required by a whole vehicle factory for the motor.

In order to achieve the purpose, the utility model adopts the technical scheme that: a bearing oil lubricating structure comprises a rotating shaft, a bearing, a motor end cover, a bearing end cover and a lubricating oil cavity, wherein one end of the motor end cover is fixedly connected with the bearing end cover;

the end part of the rotating shaft is provided with an oil inlet hole, the oil inlet hole extends inwards along the axial direction of the rotating shaft, the axial surface of the rotating shaft is provided with an oil throwing hole, the oil throwing hole extends inwards along the radial direction of the rotating shaft and is communicated with the oil inlet hole, and the oil throwing hole is communicated with the lubricating oil cavity;

the motor end cover is provided with a vent valve which is communicated with the lubricating oil cavity;

a rotating shaft retaining shoulder is arranged on the rotating shaft at one side of the bearing, which is far away from the lubricating oil cavity, the rotating shaft retaining shoulder is a first shaft shoulder with a step-shaped conical surface, and the step-shaped conical surface on the first shaft shoulder is arranged towards the bearing;

the motor end cover is provided with an oil deflector ring, a second shaft shoulder is arranged on the rotating shaft corresponding to the oil deflector ring, and the oil deflector ring and the second shaft shoulder of the rotating shaft form a labyrinth seal structure;

under the working state, an oil collecting groove and an oil outlet are arranged right below the interior of the motor end cover, the oil collecting groove penetrates through the bearing and is communicated with the lubricating oil cavity, the oil outlet is communicated with the oil collecting groove, and the height of an oil collecting surface of the oil collecting groove is higher than that of an outer ring of the bearing (2).

The relevant content in the above technical solution is explained as follows:

1. in the scheme, the oil seal is arranged between the bearing and the motor end cover, and is a framework oil seal with an auxiliary lip, and the auxiliary lip is arranged towards the lubricating oil cavity.

2. In the above scheme, the rotating shaft bearing blocking shoulder is arranged as a spiral shaft block, and the direction of the spiral shaft block is opposite to that of the rotating shaft.

3. In the scheme, the number of the oil throwing holes formed in the oil inlet hole is at least two.

4. In the above scheme, the oil slinger aperture is inclined towards the bearing in the radial direction.

The design principle and the effect of the utility model are as follows: this lubricating structure had both lubricated the bearing, a part of heat of bearing has been taken away through circulating oil again, the requirement of motor design life has been satisfied, the labyrinth structure that this structural design has had and lubricating oil guide structure has considered the failure mode of sealed inefficacy oil leak in advance simultaneously, and structural design does not increase new part, economy is effective, pressure balance's factor has still been considered to this structure in addition, and the implementation is simple, in the prior art has been solved, the bearing lubrication of motor adopts fat lubrication, it is serious to heat under high speed, the application operating mode of high load, can lead to the grease to spill over, lead to the not satisfied problem of the design life that whole car factory required the motor of bearing life.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention.

Fig. 2 is a cross-sectional view, partially in section, of an embodiment of the utility model.

Fig. 3 is a cross-sectional view, partially in section, of an embodiment of the present invention.

FIG. 4 is a cross-sectional view of another embodiment of the present invention.

Fig. 5 is a view of the detail C in fig. 4.

In the above drawings: 1. a rotating shaft; 2. a bearing; 3. a motor end cover; 4. a lubricating oil cavity; 5. oil sealing; 6. a second shoulder; 7. a vent valve; 8. a bearing end cap; 11. an oil inlet hole; 12. an oil throwing hole; 17. a conical surface stepped shaft block; 18. a spiral shaft stop; 31. an oil sump; 32. an oil outlet hole; 33. and an oil scraper ring.

Detailed Description

The utility model is further described with reference to the following figures and examples:

example (b): bearing oil lubricating structure

As shown in fig. 1-5, a bearing oil lubrication structure comprises a rotating shaft 1, a bearing 2, a motor end cover 3, a bearing end cover 8 and a lubrication cavity 4, wherein one end of the motor end cover 3 is fixedly connected with the bearing end cover 8, the lubrication cavity 4 is arranged between the motor end cover 3 and the bearing end cover 8, and the bearing 2 is sleeved on the rotating shaft 1 and is arranged in the lubrication cavity 4.

The end part of the rotating shaft 1 is provided with an oil inlet hole 11, the oil inlet hole 11 axially extends inwards along the rotating shaft 1, the axial surface of the rotating shaft 1 is provided with an oil throwing hole 12, the oil throwing hole 12 radially extends inwards along the rotating shaft 1 and is communicated with the oil inlet hole 11, and the oil throwing hole 12 is communicated with the lubricating oil cavity 4.

And a vent valve 7 is arranged on the motor end cover 3, and the vent valve 7 is communicated with the lubricating oil cavity 4.

A rotating shaft retaining shoulder is arranged on the rotating shaft 1 on one side, far away from the lubricating oil cavity 4, of the bearing 2, the rotating shaft retaining shoulder is a first shaft shoulder 17 with a step-shaped conical surface, and the step-shaped conical surface on the first shaft shoulder 17 is arranged towards the bearing 2.

The motor end cover 3 is provided with an oil retainer ring 33, a second shaft shoulder 6 is arranged on the rotating shaft 1 corresponding to the oil retainer ring 33, and the oil retainer ring 33 and the second shaft shoulder 6 of the rotating shaft 1 form a labyrinth seal structure.

In a working state, an oil collecting groove 31 and an oil outlet 32 are arranged right below the interior of the motor end cover 3, the oil collecting groove 31 penetrates through the bearing 2 to be communicated with the lubricating oil cavity 4, the oil outlet 32 is communicated with the oil collecting groove 31, and the oil collecting surface of the oil collecting groove 31 is higher than the outer ring of the bearing 2.

This lubricating structure had both lubricated the bearing, and taken away a part of heat of bearing again through circulating oil, the requirement of motor design life has been satisfied, the labyrinth structure that this structural design had and lubricating oil guide structure had simultaneously considered the failure mode of sealed inefficacy oil leak in advance, and structural design does not increase new part, economy is effective, in addition the factor of pressure balance has still been considered to this structure, breather valve 7 of installation on end cover 3, be used for balancing the pressure inside and outside lubricating oil chamber 4, in order to avoid producing the phenomenon of breathing out in lubricating oil chamber 4 and lead to the too big and realization mode of pressure in lubricating oil chamber 4 simple, in the prior art has been solved, the bearing lubrication of motor adopts fat lubrication, it is serious to heat under the high-speed, high-load's application operating mode, can lead to the grease to spill over, lead to the problem that the bearing life can not satisfy the design life that whole car factory required the motor.

On the basis, the oil seal structure further comprises an oil seal 5, wherein the oil seal 5 is arranged between the bearing 2 and the motor end cover 3, the oil seal 5 is an oil seal with an auxiliary lip framework, and the auxiliary lip is arranged towards the lubricating oil cavity 4; on the basis of the oil seal 5, the bearing blocking shoulder of the rotating shaft can also be set as a spiral shaft blocking 18, and the direction of the spiral shaft blocking 18 is opposite to that of the rotating shaft 1; this structure plays slight oil stirring effect and makes lubricating oil lubricated even, and the conical surface or helical structure or other equivalent effect structures of this structure are with lubricating oil orientation bearing direction, on the one hand fully lubricate the bearing, and on the other hand reduce the impact of lubricating oil to the oil blanket.

On the basis, at least two oil slingers 12 are arranged on the oil inlet hole 11; so that the lubricating oil in the oil inlet hole 11 fully enters the bearing 2 to fully lubricate the bearing 2.

On the basis, the oil slinger hole 12 is arranged in a way of inclining towards the bearing 2 in the radial direction; so that the lubricating oil in the oil inlet hole 11 can fully lubricate the bearing 2.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A bearing oil lubricating structure comprises a rotating shaft (1), a bearing (2), a motor end cover (3), a bearing end cover (8) and a lubricating oil cavity (4), wherein one end of the motor end cover (3) is fixedly connected with the bearing end cover (8), the lubricating oil cavity (4) is arranged between the motor end cover (3) and the bearing end cover (8), and the bearing (2) is sleeved on the rotating shaft (1) and arranged in the lubricating oil cavity (4);

the method is characterized in that: an oil inlet hole (11) is formed in the end portion of the rotating shaft (1), the oil inlet hole (11) extends inwards along the axial direction of the rotating shaft (1), an oil throwing hole (12) is formed in the axial surface of the rotating shaft (1), the oil throwing hole (12) extends inwards along the radial direction of the rotating shaft (1) and is communicated with the oil inlet hole (11), and the oil throwing hole (12) is communicated with the lubricating oil cavity (4);

the motor end cover (3) is provided with a vent valve (7), and the vent valve (7) is communicated with the lubricating oil cavity (4);

a rotating shaft retaining shoulder is arranged on the rotating shaft (1) on one side, far away from the lubricating oil cavity (4), of the bearing (2), the rotating shaft retaining shoulder is a first shaft shoulder (17) with a step-shaped conical surface, and the step-shaped conical surface on the first shaft shoulder (17) is arranged towards the bearing (2);

an oil retainer ring (33) is arranged on the motor end cover (3), a second shaft shoulder (6) is arranged on the rotating shaft (1) corresponding to the oil retainer ring (33), and the oil retainer ring (33) and the second shaft shoulder (6) of the rotating shaft (1) form a labyrinth seal structure;

under operating condition, be provided with oil trap (31) and oil outlet (32) under motor end cover (3) inside, oil trap (31) pass bearing (2) and lubricating oil chamber (4) intercommunication, oil outlet (32) communicate with each other with oil trap (31), the outer lane height that the oil collecting surface height of oil trap (31) is higher than bearing (2).

2. The bearing oil lubricating structure according to claim 1, characterized in that: still include oil blanket (5), oil blanket (5) set up between bearing (2) and motor end cover (3), oil blanket (5) are for taking vice lip skeleton oil blanket, vice lip sets up towards lubricating oil cavity (4).

3. The bearing oil lubricating structure according to claim 1, characterized in that: the rotating shaft bearing blocking shoulder is arranged as a spiral shaft blocking (18), and the direction of rotation of the spiral shaft blocking (18) is opposite to that of the rotating shaft (1).

4. The bearing oil lubricating structure according to claim 1, characterized in that: at least two oil throwing holes (12) are arranged on the oil inlet hole (11).

5. The bearing oil lubricating structure according to claim 1, characterized in that: the oil throwing hole (12) is arranged in an inclined way towards the bearing (2) in the radial direction.