CN219510009U

CN219510009U - Linear bearing

Info

Publication number: CN219510009U
Application number: CN202320171237.0U
Authority: CN
Inventors: 周一鸣; 许世钰; 朱阳洋
Original assignee: Shanghai Bearing Technology Research Institute Co ltd
Current assignee: Shanghai Bearing Technology Research Institute Co ltd
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-08-11
Anticipated expiration: 2033-02-01

Abstract

The utility model provides a linear bearing in the technical field of bearings, which comprises an outer ring, rolling bodies, a retainer and a check ring, wherein the rolling bodies are arranged on the retainer, the check ring is arranged on the outer side of the retainer, and the check ring is arranged on the inner side of the outer ring. The outer ring is provided with the square groove, and linear bearing passes through square groove axial positioning, and linear bearing prevents outer lane circumferential rotation through the square groove. According to the utility model, the square groove is arranged on the outer ring, so that the linear bearing has positioning capability under special working conditions and the outer ring is prevented from rotating. By adopting ceramic balls as rolling bodies, excessive abrasion between the roller path and the rolling bodies is avoided, and the continuous service life of the linear bearing under the non-lubrication condition is prolonged; the outer ring, the retainer and the retainer ring of the linear bearing are processed by adopting various new materials, so that the corrosion resistance requirement of the linear bearing is met.

Description

Linear bearing

Technical Field

The utility model relates to the technical field of bearings, in particular to a linear bearing.

Background

The linear bearing is a bearing for an operating mechanism, is applied to a transmission mechanism, and is an important movement mechanism part. The general linear bearing shell is deeper, the positioning is difficult, the outer diameter of the linear bearing is in transition fit with the shell, the operating transmission shaft is in interference fit with the inner compound circle, the operating shaft can perform certain-angle rotation besides performing reciprocating linear motion, and certain load control is needed. Although the general linear bearing can be added with lubricating grease during installation, the lubricating grease is inconvenient to add in a subsequent use period, so that the linear bearing can wear due to lack of lubrication under a heavy load operation or after long-time operation, and therefore the linear bearing needs to have a self-lubricating function and corrosion resistance.

The general linear bearing has no axial positioning and circumferential rotation preventing capabilities, and in the use process, the ball rolling bodies and the ball race generate dry friction due to no lubrication, so that the ball race and the ball race generate rapid wear, and the linear bearing fails in advance. Meanwhile, the conventional linear bearing can also cause the bearing to fail in advance due to corrosion of materials. Therefore, in order to solve the above problems, appropriate improvements are made on the basis of the structure of the conventional linear bearing.

Disclosure of Invention

In view of the drawbacks of the prior art, an object of the present utility model is to provide a linear bearing.

The utility model provides a linear bearing, which comprises an outer ring, rolling bodies, a retainer and a check ring, wherein the rolling bodies are arranged on the retainer;

the outer ring is provided with a square groove, the linear bearing is axially positioned through the square groove, and the linear bearing prevents the outer ring from rotating circumferentially through the square groove.

In some embodiments, the square groove is axially disposed on the outer ring.

In some embodiments, the outer race comprises a high nitrogen steel outer race.

In some embodiments, the rolling bodies employ ceramic balls, including silicon nitride ceramic balls.

In some embodiments, the cage is provided with a plurality of rolling grooves, and a plurality of rolling bodies are installed in each rolling groove in series.

In some embodiments, the holder comprises a polyimide holder.

In some embodiments, the retainer ring comprises a stainless steel retainer ring.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the square groove is arranged on the outer ring, so that the linear bearing has positioning capability and prevents the outer ring from rotating under special working conditions;

2. according to the utility model, the ceramic balls are adopted as the rolling bodies, so that the bonding between the roller path and the rolling bodies under the non-lubrication condition is avoided, and the continuous service life of the bearing under the non-lubrication condition is prolonged;

3. according to the utility model, the outer ring, the retainer and the retainer ring of the linear bearing are processed by adopting various new materials, so that the corrosion resistance requirement of the linear bearing is met.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a semi-sectional structure of a linear bearing of the present utility model;

fig. 2 is a schematic top view of the linear bearing of the present utility model.

Reference numerals:

outer race 1 retainer ring 4

Square groove 5 of rolling element 2

Cage 3

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

As shown in fig. 1-2, the utility model comprises an outer ring 1, rolling bodies 2, a retainer 3 and a retainer ring 4, wherein the rolling bodies 2 are arranged on the retainer 3, the rolling bodies 2 are ceramic balls, the ceramic balls are made of silicon nitride, and the ceramic balls can normally and continuously work under the condition that a linear bearing is not lubricated. A retainer ring 4 is arranged on the outer side of the retainer 3, and the retainer ring 4 is arranged on the inner side of the outer ring 1. Be provided with square groove 5 on the outer lane 1, linear bearing passes through square groove 5 and realizes axial positioning, and linear bearing prevents through square groove 5 that outer lane 1 circumference from rotating. The square groove 5 is formed on the outer ring 1, so that the linear bearing has positioning capability and prevents the outer ring from rotating under special working conditions.

The square groove 5 is axially arranged on the outer ring 1, the outer ring 1 is made of high-nitrogen steel, and the retainer ring 4 is made of stainless steel. The cage 3 is provided with a plurality of rolling grooves, and a plurality of rolling bodies 2 are arranged in each rolling groove in series. The retainer 3 is made of polyimide, and the retainer 3 is subjected to oil immersion process treatment.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the utility model and the features of the embodiments may be combined with each other arbitrarily without conflict.

Claims

1. The linear bearing is characterized by comprising an outer ring (1), rolling bodies (2), a retainer (3) and a retainer ring (4), wherein the rolling bodies (2) are arranged on the retainer (3), the retainer ring (4) is arranged on the outer side of the retainer (3), and the retainer ring (4) is arranged on the inner side of the outer ring (1);

the outer ring (1) is provided with a square groove (5), the linear bearing is axially positioned through the square groove (5), and the linear bearing prevents the outer ring (1) from rotating circumferentially through the square groove (5).

2. Linear bearing according to claim 1, characterized in that the square groove (5) is arranged axially on the outer ring (1).

3. Linear bearing according to claim 1, characterized in that the outer ring (1) comprises a high nitrogen steel outer ring.

4. Linear bearing according to claim 1, characterized in that the rolling bodies (2) are ceramic balls, which comprise silicon nitride ceramic balls.

5. Linear bearing according to claim 1, characterized in that the cage (3) is provided with a plurality of rolling grooves, in each of which a plurality of rolling bodies (2) are mounted in series.

6. Linear bearing according to claim 1, characterized in that the cage (3) comprises a polyimide cage.

7. Linear bearing according to claim 1, characterized in that the retaining ring (4) comprises a stainless steel retaining ring.