CN109958714B

CN109958714B - Roller bearing retainer for new energy automobile electric automobile

Info

Publication number: CN109958714B
Application number: CN201910223521.6A
Authority: CN
Inventors: 郑文峰; 王乐; 张克师; 李军
Original assignee: Wuhu C&u Bearing Co ltd
Current assignee: Wuhu C&u Bearing Co ltd
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2020-10-02
Anticipated expiration: 2039-03-22
Also published as: CN109958714A

Abstract

The invention discloses a roller bearing retainer for a new energy automobile, which comprises a retainer body, wherein a bearing outer ring is arranged outside the retainer body, a bearing inner ring is arranged inside the retainer body, the bearing outer ring and the bearing inner ring are both in matched connection with the retainer body, and the retainer body comprises: the upright posts are arranged in a radial shape, and ball pockets are formed between the upright posts; the left guide flange is arranged on the left side of the upright post and is fixedly connected with the upright post; the right guide flange is arranged on the right side of the upright post and is fixedly connected with the upright post; the cross section of the retainer body is Z-shaped, a plurality of rollers are embedded in the retainer body, and the rollers are connected with the retainer body in a matching mode. The problems of early failure, poor noise and the like caused by insufficient lubrication and large friction force in the using process of the conventional bearing are solved.

Description

Roller bearing retainer for new energy automobile electric automobile

Technical Field

The invention relates to the field of bearings, in particular to a roller bearing retainer for a new energy automobile.

Background

With the strictness of environmental regulations and the gradual consumption of energy, the global demand for environment-friendly automobiles increases day by day, and new energy electric automobiles are becoming popular at an accelerated rate. The new energy electric automobile bearing works and operates under the conditions of high rotating speed, rapid acceleration and rapid deceleration for a long time, the bearing must meet the requirements of high rotating speed, low torque and low noise, and the problems of early failure, poor noise and the like caused by insufficient lubrication and large friction force are easily caused in the using process of the traditional window hole type nylon retainer (as shown in figures 4 and 5).

Disclosure of Invention

The invention aims to provide a roller bearing retainer for a new energy automobile and an electric automobile, which aims to solve the problems of early failure, poor noise and the like caused by insufficient lubrication and large friction force easily occurring in the use process of the existing bearing in the background technology.

The utility model provides a roller bearing holder for new energy automobile electric automobile, includes the holder body, holder body outside is equipped with the bearing inner race, the inside bearing inner race that is equipped with of holder body, bearing inner race and bearing inner race all are connected with holder body cooperation, the holder body includes:

the vertical columns are arranged in a radial mode, and ball pockets are formed among the vertical columns;

the left guide flange is arranged on the left side of the upright post and is fixedly connected with the upright post;

the right guide flange is arranged on the right side of the upright post and is fixedly connected with the upright post;

the cross-section of the retainer body is Z-shaped, a plurality of rollers are embedded in the retainer body, and the rollers are connected with the retainer body in a matched mode.

Preferably, the whole of the left guide rib is a circular ring, the inner diameter of the left guide rib is not larger than the distance from the central axis of the roller to the center of the bearing inner ring, and the outer diameter of the left guide rib is equal to the distance from the outer end face of the upright post to the center of the bearing inner ring.

Preferably, the whole right guide rib is a circular ring, the outer diameter of the right guide rib is not less than the distance from the central axis of the roller to the center of the bearing inner ring, and the inner diameter of the right guide rib is equal to the distance from the inner end surface of the stand column to the center of the bearing inner ring.

Preferably, the left guide rib, the right guide rib and the upright post are integrally formed.

Preferably, the cross section of the side surface of the upright post is composed of three circular arcs.

Preferably, the cross section of the side surface of the upright post consists of a circular arc and two tangent lines.

Preferably, the arc segment is:

the radius of the middle section arc is the same as that of the roller, and the roller is rotationally connected with the middle section arc;

the two sections of tangent lines are as follows:

the upper section tangent line is in transition connection with the middle section arc;

and the lower section tangent line is in transitional connection with the middle section arc.

Preferably, the included angle between the lower section tangents on two adjacent upright posts is 20 degrees.

The invention has the beneficial effects that: the retainer overcomes the problems of poor lubrication, overlarge friction torque, poor noise and the like of the cylindrical roller bearing of the electric automobile during high-speed operation. The bearing can meet the requirements that the bearing of the new energy electric automobile works and runs under the conditions of high rotating speed, rapid acceleration and rapid deceleration for a long time, and the bearing has high rotating speed, low torque and low noise.

The structure of the retainer is improved, so that the cross section of the retainer is integrally Z-shaped, and sufficient lubricating oil paths are reserved between the interior of the retainer and the inner ring and between the interior of the retainer and the outer ring of the bearing, so that lubricating oil of a gearbox can easily enter the interior of the bearing, and the lubrication of the bearing is improved. Meanwhile, the contact areas of the left guide flange and the right guide flange of the retainer and the end surface of the roller and the contact areas of the pocket hole of the retainer ball and the rolling surface of the roller are reduced, the friction torque and the noise are reduced, and the material consumption and the cost of the retainer are saved.

Drawings

FIG. 1 is a schematic view of a cage assembly according to an embodiment of the present invention;

FIG. 2 is a schematic view of a cage according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a cage column according to an embodiment;

FIG. 4 is a schematic view of a prior art retainer assembly;

FIG. 5 is a schematic view of a prior art retainer;

fig. 6 is a schematic structural view of a rolling ball of a vertical column of a second embodiment of the retainer.

Wherein: 1. a bearing outer race; 2. a bearing inner race; 3. a column; 4. a left guide flange; 5. a right guide rib; 6. a roller; 7. a lower arc; 8. a middle section arc; 9. an upper arc; 10, a spherical groove; 11. a ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, a roller bearing holder for new energy automobile electric automobile, including the holder body, holder body outside is equipped with bearing inner race 1, the inside bearing inner race 2 that is equipped with of holder body, and bearing inner race 1 and bearing inner race 2 all are connected with holder body cooperation, and the holder body includes: the upright posts 3 are arranged in a radial mode, and ball pocket holes are formed among the upright posts 3; the left guide flange 4 is arranged on the left side of the upright post 3, and the left guide flange 4 is fixedly connected with the upright post 3; the right guide flange 5 is arranged on the right side of the upright post 3, and the right guide flange 5 is fixedly connected with the upright post 3; the cross-section of the retainer body is Z-shaped, a plurality of rollers 6 are embedded in the retainer body, and the rollers 6 are connected with the retainer body in a matching mode.

As shown in figure 1, the roller 6 is embedded in the ball pocket hole, the roller 6 rotates in the ball pocket hole, the left guide flange 4, the cross section of the roller 6 and the right guide flange 5 are Z-shaped, and a sufficient lubricating oil path is reserved between the retainer body and the bearing inner ring 2 and between the retainer body and the bearing outer ring 1, so that lubricating oil of the gearbox can easily enter the bearing, the bearing lubrication is improved, and the noise is reduced.

Left side guide flange 4, right

side guide flange

5 and 3 integrated into one piece of stand, left side guide flange 4 is whole to be the ring, and the internal diameter of left side guide flange 4 is not more than the distance of 6 axis of roller to the 2 centre of a circle of bearing inner race, the external diameter of left side guide flange 4 equals with the distance of 3 outer terminal surfaces of stand to the 2 centre of a circle of bearing inner race, right side guide flange 5 is whole to be the ring, and the external diameter of right side guide flange 5 is not less than the distance of 6 axis of roller to the 2 centre of a circle of bearing inner race, the internal diameter of right side guide flange 5 equals with the distance of 3 inner terminal surfaces of stand to the 2 centre of a circle of bearing inner.

In the invention, the inner diameter of the left guide rib 4 is not more than the distance from the central axis of the roller 6 to the circle center of the bearing inner ring 2, so that the roller 6 is supported by the right retainer body on the left side of the roller 6 in the rotating process, the outer diameter of the right guide rib 5 is not less than the distance from the central axis of the roller 6 to the circle center of the bearing inner ring 2, the right side of the roller 6 is supported by the retainer body, the roller 6 cannot deviate in the rotating process, and the material is saved.

The cross section of the side surface of the upright post 3 consists of a section of circular arc and two sections of tangent lines, wherein the section of the circular arc and the two sections of tangent lines are respectively as follows: the radius of the middle section arc 8 is the same as that of the roller 6, and the roller 6 is rotationally connected with the middle section arc 8; an upper section tangent line 9, wherein the upper section tangent line 9 is in transitional connection with the middle section arc 8; the lower section tangent line 7, the lower section tangent line 7 and the middle section arc 8 are in transition connection. The included angle between the lower section tangent lines 7 on the two adjacent upright posts 3 is 20 degrees.

As shown in fig. 4, the original ball pocket structure is an arc with a diameter slightly larger than that of the roller 6, so that the contact surface between the roller 6 and the surface of the upright post is too large in the bearing operation process, the radial displacement of the roller 6 in the ball pocket is large, and the friction torque and the noise of the bearing are increased. As shown in fig. 3, the original circular arc of the upright post 3 is changed into the circular arc composed of a section of circular arc and two sections of tangent lines, wherein the upper section of tangent line 9 is transitionally connected with the middle section of circular arc 8; the lower section tangent line 7, the lower section tangent line 7 and the middle section arc 8 are in transition connection. The included angle between the lower section tangent lines 7 on the two adjacent upright posts 3 is 20 degrees, so that the contact surface between the roller and the ball pocket of the support post is greatly reduced, and the friction torque and the vibration noise are reduced. When the bearing just starts to work, the roller 6 is influenced by the interaction force of the bearing inner ring 2 and the bearing outer ring 1 and can deflect to a certain degree, at the moment, the roller 6 can be in contact with the side surface of the upright post 3, in the conventional arrangement, the side surface of the upright post 3 is arc-shaped, after the bearing runs at a high speed, the roller 6 can only rotate at a high speed at the arc section of the side surface of the upright post 3, in this case, when the roller 6 just starts to rotate, the roller 6 is in surface contact with the side surface of the upright post 3, and the contact area is large.

The specific working principle and steps are as follows: inlay roller 6 in the ball pocket downthehole, roller 6 rotates at the ball pocket downthehole, and its left side guide flange 4, roller 6 cross-section and right guide flange 5 become the Z type, have reserved sufficient lubricated oil circuit between this internal and bearing inner race 2, the bearing outer lane 1 of holder, inside enabling gearbox lubricating oil easy entering bearing, improved the bearing lubrication, reduced the noise.

Experiments prove that when the included angle of the tangent lines at the joint of the upper and middle section arcs 8 and the lower section tangent lines 7 of the two adjacent upright posts 3 is 20 degrees, the strength performance of the retainer body is the highest.

Allowable strut pocket angle determined by cage column 3 strength

The Z-shaped retainer and the existing window hole-shaped retainer are obviously reduced in vibration acceleration, speed and starting torque by detecting on an S0910 vibration measuring instrument, a BVT-5 vibration measuring instrument and a torque instrument, wherein the inner ring, the outer ring 1 of the bearing and the roller 6 meet the process requirements.

As a second embodiment of the invention

As shown in fig. 6, the middle part of the middle section circular arc 8 is provided with a plurality of spherical grooves 11, the spherical grooves 11 are internally provided with rolling balls 10, the rolling balls 10 are in rolling connection with the spherical grooves 11, the rolling balls 10 are in contact connection with the rollers 6, and the rollers 6 and the rolling balls 10 can realize point contact by the way, so that the contact area between the rolling balls 10 and the rollers 6 is greatly reduced, the friction moment and the vibration noise are reduced, the gap between the rolling balls 10 and the rollers 6 is increased, and the lubricating oil can conveniently enter the gap.

In this application, two upper and lower parts of stand side surface are the tangent line, so only need set up roller 6 in the circular arc middle section can, the bearing just begins when rotating, and roller 6 takes place to squint, and the contact takes place with upper segment tangent line 9 or hypomere tangent line 7, and the contact this moment is the point contact, and the resistance is very little, need not to reduce frictional force through setting up spin 10, under the prerequisite that reaches same effect, has also reduced production manufacturing cost.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a roller bearing holder for new energy automobile electric automobile, includes the holder body, holder body outside is equipped with bearing inner race (1), and holder body inside is equipped with bearing inner race (2), bearing inner race (1) and bearing inner race (2) all are connected with holder body cooperation, its characterized in that, the holder body includes:

the vertical columns (3) are arranged in a radial mode, and ball pockets are formed among the vertical columns (3);

the left guide flange (4) is arranged on the left side of the upright post (3), and the left guide flange (4) is fixedly connected with the upright post (3);

the right guide flange (5) is arranged on the right side of the upright post (3), and the right guide flange (5) is fixedly connected with the upright post (3);

the cross-section of holder body is the Z type, holder body is embedded to have a plurality of rollers (6), roller (6) are connected with the cooperation of holder body, the cross-section of stand (3) side surface comprises one section circular arc and two sections tangent lines, one section circular arc is:

the radius of the middle section arc (8) is the same as that of the roller (6), and the roller (6) is rotationally connected with the middle section arc (8);

the two sections of tangent lines are as follows:

the upper section tangent (9), the upper section tangent (9) is in transition connection with the middle section arc (8);

the lower section tangent line (7) is in transitional connection with the middle section arc (8).

2. The roller bearing retainer for the new energy automobile electric vehicle is characterized in that the left guide rib (4) is a circular ring as a whole, the inner diameter of the left guide rib (4) is not larger than the distance from the central axis of the roller (6) to the center of the bearing inner ring (2), and the outer diameter of the left guide rib (4) is equal to the distance from the outer end face of the upright post (3) to the center of the bearing inner ring (2).

3. The roller bearing retainer for the new energy automobile electric vehicle is characterized in that the right guide rib (5) is a circular ring as a whole, the outer diameter of the right guide rib (5) is not less than the distance from the central axis of the roller (6) to the center of the bearing inner ring (2), and the inner diameter of the right guide rib (5) is equal to the distance from the inner end face of the upright post (3) to the center of the bearing inner ring (2).

4. The roller bearing retainer for the new energy automobile electric vehicle is characterized in that the left guide rib (4), the right guide rib (5) and the upright post (3) are integrally formed.

5. The roller bearing retainer for the new energy automobile and the electric automobile is characterized in that an included angle between lower section tangent lines (7) of two adjacent upright columns (3) is 20 degrees.

6. The roller bearing retainer for the new energy automobile electric automobile is characterized in that a plurality of spherical grooves (11) are formed in the middle of the middle section arc (8), rolling balls (10) are arranged in the spherical grooves (11), the rolling balls (10) are in rolling connection with the spherical grooves (11), and the rolling balls (10) are in contact connection with the rollers (6).