CN220869892U

CN220869892U - Low friction bearing retainer for electric drive

Info

Publication number: CN220869892U
Application number: CN202322408493.XU
Authority: CN
Inventors: 郑广会; 赵培振
Original assignee: Shandong Golden Empire Precision Machinery Technology Co Ltd
Current assignee: Shandong Golden Empire Precision Machinery Technology Co Ltd
Priority date: 2023-09-05
Filing date: 2023-09-05
Publication date: 2024-04-30
Anticipated expiration: 2033-09-05

Abstract

The utility model belongs to the technical field of bearings, and particularly provides a low-friction bearing retainer for electric drive, which comprises an annular body, wherein the body is axially provided with a first end and a second end, the first end of the body is provided with a plurality of arc-shaped grooves, the arc-shaped grooves are sequentially arranged along the circumferential direction of the body, and the arc-shaped grooves radially penetrate through the body; each arc-shaped groove is provided with a retaining claw along two sides of the retainer in the circumferential direction, and each retaining claw is arranged at the end face of the body along the first end and protrudes in the direction away from the body; the arc-shaped groove and the holding claws on two sides of the arc-shaped groove form a pocket; the holding claw extends from the outer side of the body towards one side of the center of the body, an included angle is formed between the extending direction of the holding claw and the central axis direction of the arc-shaped groove, and the distance between the two holding claws at the same arc-shaped groove is gradually reduced along the direction away from the center of the body.

Description

Low friction bearing retainer for electric drive

Technical Field

The application belongs to the technical field of bearings, and particularly provides a low-friction bearing retainer for electric drive.

Background

In the case of a ball bearing comprising an inner and an outer race of the bearing, a cage is provided between the inner and outer races, the cage retaining the balls in the bearing. The bearing in the electric drive field has the characteristic of high rotating speed, and in the process of high-speed rotation of the bearing, the balls and the retainer are easy to generate.

Disclosure of utility model

The utility model aims to provide a low-friction bearing retainer for electric drive, which is used for solving at least one of the technical problems.

In order to solve the above-mentioned problems in the prior art, one or more embodiments of the present utility model provide a low friction bearing cage for electric drive, including an annular body having a first end and a second end along an axial direction, wherein the first end of the body has a plurality of arc-shaped grooves, the plurality of arc-shaped grooves are sequentially arranged along a circumferential direction of the body, and the arc-shaped grooves penetrate the body along a radial direction; each arc-shaped groove is provided with a retaining claw along two sides of the retainer in the circumferential direction, and each retaining claw is arranged at the end face of the body along the first end and protrudes in the direction away from the body; the arc-shaped groove and the holding claws on two sides of the arc-shaped groove form a pocket; the holding claw extends from the outer side of the body towards one side of the center of the body, an included angle is formed between the extending direction of the holding claw and the central axis direction of the arc-shaped groove, and the distance between the two holding claws at the same arc-shaped groove is gradually reduced along the direction away from the center of the body.

The beneficial effects of one or more of the technical schemes are as follows:

In the scheme, the pocket for accommodating the ball is formed by enclosing the arc-shaped groove at the body and the two holding claws, and the two holding claws are in clearance and are not connected, so that the pocket can be replaced by the open pocket, and the weight reduction of the retainer can be realized; and the area of the inner wall of the pocket is smaller than that of the pocket, so that the contact area of the pocket and the balls is reduced, and friction is reduced.

In this scheme, keep claw by the outside of body towards the central one side extension of body, keep claw's extending direction and the axis direction of arc wall have the contained angle, along keeping away from body central direction, the interval of two keep claws diminishes gradually. The arrangement mode is limited, so that the holding claws are in point contact with the balls, the contact area between the holding claws and the balls can be reduced, and friction is reduced; after the retainer, the balls, the bearing inner ring and the bearing outer ring are mounted, the distance between the two retaining claws along the direction away from the center of the body is gradually reduced, so that the balls can be prevented from separating from the pocket groove, and the radial bearing capacity of the retainer is conveniently improved.

In the scheme, the holding claw is arranged at the end face of the body along the first end, and the arc-shaped groove is also arranged at the first end of the body; the arrangement mode enables the arc-shaped groove and the pocket groove formed by the retaining claw to be away from the ball after the ball is accommodated, and the connecting part of the retaining claw and the body is away from the ball to form a flow guide channel allowing the lubricating oil to pass through, so that the lubricating oil is conveniently guided into the pocket groove, and friction between the ball and the retaining claw is reduced.

Drawings

Some embodiments of the application are described below with reference to the accompanying drawings, in which:

FIG. 1 is an isometric view of an overall structure in an embodiment of the utility model;

FIG. 2 is an enlarged schematic view of the portion A of FIG. 1;

FIG. 3 is an isometric view of an alternative view of the overall structure in an embodiment of the utility model;

FIG. 4 is a partial cross-sectional view of the overall structure in an embodiment of the utility model;

FIG. 5 is a schematic view of the overall structure after ball mounting in an embodiment of the utility model;

FIG. 6 is a schematic front view of the overall structure of an embodiment of the present utility model;

FIG. 7 is a cross-sectional view taken in the direction A-A of FIG. 6;

Fig. 8 is an enlarged schematic view of the structure of the portion B in fig. 7.

In the figure, 1, a body; 2. an arc-shaped groove; 201. a contour line; 3. a holding claw; 301. a border; 302. a plane; 303. a cambered surface; 4. a reinforcing plate; 5. a pocket; 6. an oil groove; 7. a ball; 8. a first flow directing channel; 9. and a second diversion channel.

Detailed Description

It should be understood by those skilled in the art that the embodiments described below are only preferred embodiments of the present application, and do not represent that the present application can be realized only by the preferred embodiments, which are merely for explaining the technical principles of the present application, not for limiting the scope of the present application. All other embodiments, which can be obtained by a person skilled in the art without any inventive effort, based on the preferred embodiments provided by the present application, shall still fall within the scope of protection of the present application.

It should be noted that, in the description of the present application, terms such as "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships, which are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that devices 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 8, an exemplary embodiment of the present application provides a low friction bearing holder for electric drive, comprising an annular body 1, the body 1 having a first end and a second end in an axial direction, wherein the first end of the body 1 has a plurality of arc-shaped grooves 2, the plurality of arc-shaped grooves 2 are sequentially arranged along a circumferential direction of the body 1, and the arc-shaped grooves 2 penetrate the body 1 in a radial direction; each arc-shaped groove 2 is respectively provided with a retaining claw 3 at two sides along the circumferential direction of the retainer, and the retaining claws 3 are arranged at the end face of the body 1 along the first end and protrude along the direction away from the body 1; the arc-shaped groove 2 and the holding claws 3 at two sides of the arc-shaped groove 2 are enclosed into a pocket 5; the holding claws 3 extend from the outer side of the body 1 towards one side of the center of the body 1, the extending direction of the holding claws 3 forms an included angle with the central axis direction of the arc-shaped groove 2, and the distance between the two holding claws 3 at the same arc-shaped groove 2 gradually becomes smaller along the direction away from the center of the body 1.

Specifically, the body 1 and the holding claw 3 in the holder are integrally formed in an injection molding mode, and the material of the holding claw can be PA46 material or PEEK material.

Specifically, the intervals between adjacent pockets 5 may be the same, that is, different pockets 5 are uniformly distributed along the circumferential direction of the retainer; in other embodiments, the pockets 5 may be used in pairs, where two pockets 5 in each pair of pockets 5 are spaced apart by A1 and two adjacent pockets 5 are spaced apart by A2; the value A1 may be the same as or different from the value A2.

Specifically, along the direction of keeping away from the center of body 1, the interval of two holding claws 3 in same arc wall 2 department diminishes gradually, and this can avoid ball 7 to deviate from pocket 5 to the inboard of holder, and then increases the structural strength of whole bearing after the installation finishes. The opening of the arc-shaped groove 2 is here at the first end of the body 1, which is concave from the first end to the second end of the body 1. The inner wall surface of the arc-shaped groove 2 is an arc-shaped surface, and the arc-shaped surface is attached to the spherical surface of the ball 7.

In this embodiment, one end of the holding claw 3 near the body 1 is a connection end, and a side of the connection end facing the pocket 5 is provided with a side line 301, the side line 301 is a straight line, and along the axial direction of the holder, the projection of the side line 301 is located outside the projection of the pocket 5.

It is known that when the projection of the edge 301 along the axial direction of the cage is outside the projection of the pocket 5, the connecting end has a large clearance with the installed ball 7, and the clearance is convenient for forming a diversion channel of the lubricating oil.

As shown in fig. 2, in this embodiment, the end of the pocket 5 near the holding claw 3 has an arc-shaped contour line 201, and the edge 301 is tangent to the contour line 201. The tangent point of the contour line 201 and the side line 301 is the contact point of the connecting end and the arc-shaped groove 2, and at this time, the contact point is taken as a demarcation point, and two diversion channels are respectively formed on the inner side and the outer side of the contact point along the radial direction of the body 1. Namely a first diversion channel 8 and a second diversion channel 9 shown in fig. 8.

In this embodiment, a reinforcing plate 4 is provided between adjacent pockets 5, and the reinforcing plate 4 connects two adjacent holding claws 3 located at different pockets 5. Specifically, the end portions of the reinforcing plate 4 in the retainer circumferential direction are fixed to the outer side walls of the adjacent two holding claws 3, respectively, and the reinforcing plate 4 is fixed to the body 1. The reinforcing plate 4, the holding claws 3 and the body 1 are integrally formed. The stiffening webs 4 are likewise arcuate in order to fit the ring-shaped configuration of the cage. The arrangement forms a stressed whole body of two adjacent holding claws 3 and the annular body 1, so that the structural strength of the holding claws 3 and the whole retainer along the radial direction and the circumferential direction is improved.

In this embodiment, the body 1 between adjacent pockets 5 forms a window beam, in which an oil groove 6 is provided, the oil groove 6 extending from the second end to the first end of the body 1. The arrangement mode can firstly utilize the oil groove 6 to reduce the weight of the whole retainer, so as to realize weight reduction operation; in addition, through the oil storage effect of the oil groove 6, the ring body is convenient to be evenly distributed along the circumferential direction at the second end,

In this embodiment, the oil groove 6 extends from the second end to the first end of the body 1 and the opening becomes gradually smaller. As can be seen, when the body 1 extends from the second end to the first end, the physical structure of the body 1 gradually becomes smaller in proportion to the structural strength due to the opening of the pocket 5; the tapering feature of the opening of the sump 6 facilitates reducing structural weakening of the sump 6 with respect to the body 1. More specifically, the oil groove 6 has a horn-like structure.

In this embodiment, the side of the holding claw 3 facing the pocket 5 includes a plane 302 and an arc surface 303 connected, and the arc surface 303 is on the side away from the body 1. When the side surface of the holding claw 3 is composed of the flat surface 302 and the arc surface 303, the flat surface 302 can only be in point contact with the ball 7, and no surface contact or line contact is made; this arrangement further reduces the contact area between the balls 7 and the holding claws 3, reduces friction between them, and reduces heat generation, noise and wear.

Thus far, the technical solution of the present application has been described in connection with the foregoing preferred embodiments, but it will be readily understood by those skilled in the art that the scope of the present application is not limited to the above-described preferred embodiments. The technical solutions in the above preferred embodiments can be split and combined by those skilled in the art without departing from the technical principles of the present application, and equivalent changes or substitutions can be made to related technical features, so any changes, equivalent substitutions, improvements, etc. made within the technical principles and/or technical concepts of the present application will fall within the protection scope of the present application.

Claims

1. The low-friction bearing retainer for electric drive is characterized by comprising an annular body, wherein the body is provided with a first end and a second end along the axial direction, the first end of the body is provided with a plurality of arc-shaped grooves, and the arc-shaped grooves are sequentially arranged along the circumferential direction of the body and penetrate through the body along the radial direction;

Each arc-shaped groove is provided with a retaining claw along two sides of the retainer in the circumferential direction, and each retaining claw is arranged at the end face of the body along the first end and protrudes in the direction away from the body; the retaining claws at the two sides of the arc-shaped groove and the arc-shaped groove form a bib groove;

The retaining claw extends from the outer side of the body towards one side of the center of the body, and an included angle is formed between the extending direction of the retaining claw and the central axis direction of the arc-shaped groove; along the direction away from the center of the body, the distance between the two holding claws at the same arc-shaped groove is gradually reduced.

2. The electrically driven low friction bearing holder according to claim 1, wherein an end of the holding claw near the body is a connecting end, and a side of the connecting end facing the pocket groove is provided with a straight side line; along the axial direction of the retainer, the projection of the edge line is positioned outside the projection of the pocket.

3. The electrically driven low friction bearing cage of claim 2 wherein the pocket has an arcuate contour near the end of the retaining pawl, the edge being tangent to the contour.

4. The electrically driven low friction bearing cage of claim 1 wherein a reinforcing plate is provided between adjacent pockets, the reinforcing plate connecting two adjacent retaining claws located at different pockets.

5. The electrically driven low friction bearing retainer as defined in claim 1, wherein the body between adjacent pockets forms a window beam having an oil groove therein extending from the second end of the body toward the first end.

6. The electrically driven low friction bearing retainer as defined in claim 5, wherein said oil sump opening is tapered in a direction from the second end toward the first end of the body.

7. The electrically driven low friction bearing holder according to claim 6, wherein the oil groove has a horn-like structure.

8. The electrically driven low friction bearing retainer of claim 1 wherein the side of the retaining pawl facing the pocket includes a planar surface and an arcuate surface that are connected, the arcuate surface being on a side remote from the body.