CN215805786U

CN215805786U - Bearing retainer

Info

Publication number: CN215805786U
Application number: CN202121696229.5U
Authority: CN
Inventors: 宋世勇; 呙如兵; 李光辉; 顿丽华; 邹德鹏; 姚国栋
Original assignee: WAFANGDIAN BEARING CO Ltd; CRRC Qishuyan Institute Co Ltd
Current assignee: WAFANGDIAN BEARING CO Ltd; CRRC Qishuyan Institute Co Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-02-11
Anticipated expiration: 2031-07-26

Abstract

The utility model relates to a bearing retainer, which comprises a retainer body consisting of two half retainers arranged in a mirror image manner and a plurality of pockets arranged at intervals along the circumferential direction of the retainer body, wherein each pocket is formed by buckling concave spherical surfaces respectively arranged on the two half retainers, and a spherical rolling body has a contact point with the two concave spherical surfaces respectively when running in the pocket. The spherical rolling bodies are in two-point contact with spherical pockets formed by the two half cages when in operation, so that the rotation stability of the cages is ensured when the bearing rotates at high speed; meanwhile, a certain gap exists between the spherical rolling body and the retainer, so that the flow of lubricating grease in the bearing is improved, and the lubricating state of the bearing is improved.

Description

Bearing retainer

Technical Field

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

Background

The retainer is used for uniformly isolating rolling bodies of a bearing, and for a high-performance ball bearing requiring high speed, low vibration and low noise, the retainer not only requires the requirements of ensuring the low vibration and low noise of the bearing, but also needs to ensure the lubricating effect of the bearing under the high-speed condition.

SUMMERY OF THE UTILITY MODEL

In view of the shortcomings of the prior art, the utility model aims to provide a bearing retainer which can ensure the stability of the bearing retainer during high-speed operation.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a bearing retainer characterized in that: include the holder body that comprises two half holders that mirror symmetry set up and follow a plurality of pockets that holder body circumference interval set up, every the pocket is by setting up respectively two concave spherical surface lock on the half holder forms, and spherical rolling element is in when operation respectively with two in the pocket there is a contact point concave spherical surface.

Furthermore, the diameter of the revolution center of the retainer is smaller than that of the revolution center of the spherical rolling body.

Furthermore, an included angle is formed between a connecting line of each contact point and the rotation center of the pocket and contact surfaces of the two half cages.

Furthermore, the radius of the concave spherical surface is larger than that of the spherical rolling body, and the spherical center of the concave spherical surface and the rotation center of the pocket are eccentrically arranged.

Further, the two half-cages are fixed together by fasteners.

Furthermore, a connecting part is arranged between the plurality of concave parts on each half holder, a through hole is radially formed in the connecting part, and the fastening piece is fixedly connected in the through hole.

Further, the fastener is a rivet.

Further, the spherical rolling bodies are steel balls.

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

the utility model provides a bearing retainer, which comprises a retainer body consisting of two half retainers arranged in a mirror image manner and a plurality of pockets arranged at intervals along the circumferential direction of the retainer body, wherein each pocket is formed by buckling concave spherical surfaces respectively arranged on the two half retainers, and a spherical rolling body has a contact point with the two concave spherical surfaces respectively when running in the pocket. The spherical rolling bodies are in two-point contact with spherical pockets formed by the two half cages when in operation, so that the rotation stability of the cages is ensured when the bearing rotates at high speed; meanwhile, a certain gap exists between the spherical rolling body and the retainer, so that the flow of lubricating grease in the bearing is improved, and the lubricating state of the bearing is improved.

Drawings

FIG. 1 is a schematic diagram of a radial orthographic projection configuration of an embodiment of the utility model;

fig. 2 is a schematic axial orthographic projection structure according to an embodiment of the utility model.

In the figure: 1. the bearing cage comprises a cage body, 1.1, a half cage, 1.2, an inwards concave spherical surface, 1.3, a rotation center of a pocket, 2, a spherical rolling body, 3, a contact point, 4, a contact surface, 5, a through hole, 6, a rivet, 7 and a gap.

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.

Example 1

As shown in fig. 1-2, a bearing retainer is a radially sinking type axially symmetric eccentric spherical pocket retainer, which includes a retainer body 1 composed of two half retainers 1.1 arranged in mirror image, and a plurality of pockets arranged at intervals along the circumferential direction of the retainer body 1, and the spherical rolling elements 2 contact with the pockets at two points during operation (i.e., when the spherical rolling elements 2 and the retainer move relative to each other), it should be noted that the diameter of the center of rotation of the retainer in this embodiment is smaller than that of the center of rotation of the spherical rolling elements 2, so that the spherical rolling elements 2 sink down in the pockets.

The two half cages 1.1 are fixed together through a fastener, specifically, each half cage 1.1 comprises an inner concave part forming a pocket and a connecting part between the inner concave parts, a through hole 5 is radially formed in the connecting part on each half cage 1.1, and the fastener is fixedly connected in the through hole 5. Preferably the fastener is a rivet 6. It should be noted that the two half-cages 1.1 in the present invention are arranged in mirror image, i.e. the two half-cages 1.1 are arranged symmetrically with respect to their mutual contact surfaces 4.

The concave part on each half-retainer 1.1 is provided with a concave curved surface, each pocket is formed by buckling the concave curved surfaces of the concave parts in the two half-retainers 1.1 respectively, and the spherical rolling bodies 2 have a contact point 3 with the two concave curved surfaces of the pocket respectively when running in the pockets.

In this embodiment, the concave curved surface on the concave portion of each half cage 1.1 is a concave spherical surface 1.2, i.e. each pocket is formed by buckling concave spherical surfaces 1.2 respectively arranged on the two half cages 1.1, the radius of the concave spherical surface 1.2 is larger than that of the spherical rolling element 2, and the spherical center of the concave spherical surface 1.2 is eccentrically arranged with the rotation center 1.3 of the pocket (i.e. the spherical center of the concave spherical surface 1.2 is axially eccentric with the rotation center 1.3 of the pocket by a certain amount e), so that after the concave spherical surfaces 1.2 of the two half cages 1.1 are buckled, a radial orthographic projection surface similar to an elliptical pocket is formed, when the bearing operates, the spherical rolling element 2 is in two-point contact with the two half pockets of the spherical cage 1.1 (as shown in fig. 1), the connecting line of each contact point 3 with the rotation center 1.3 of the pocket and the contact surfaces 4 of the two half cages 1.1, the rotation stability of the spherical rolling body 2 is ensured when the bearing rotates at a high speed; meanwhile, a certain gap 7 exists between the spherical rolling body 2 and the pocket, so that the flow of lubricating grease in the bearing is improved, and the lubricating state of the bearing is improved.

The technical scheme ensures the stability of the retainer when the bearing runs at high speed and improves the high-speed dynamic performance of the bearing; meanwhile, the fluidity of the lubricating grease is improved, and the lubrication of the sliding surface between the spherical rolling element 2 and the retainer is improved. The embodiment is suitable for the high-performance ball bearing applied under the conditions of high speed and low vibration noise. The cage may be made of metal, such as copper or steel, the cage of the present embodiment is made of copper, and the spherical rolling elements 2 of the present embodiment are steel balls.

Compared with the prior art, the embodiment has the beneficial effects that:

according to the bearing retainer provided by the embodiment, the spherical pocket hole which is formed by the two half retainers 1.1 and is in two-point contact with the spherical rolling body 2 ensures the stability of the bearing retainer during high-speed operation, and improves the high-speed dynamic performance of the bearing; meanwhile, the fluidity of the lubricating grease is improved, and the lubrication of the sliding surface between the spherical rolling element 2 and the retainer is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A bearing retainer characterized in that: include the holder body that comprises two half holders that mirror symmetry set up and follow a plurality of pockets that holder body circumference interval set up, every the pocket is by setting up respectively two concave spherical surface lock on the half holder forms, and spherical rolling element is in when operation respectively with two in the pocket there is a contact point concave spherical surface.

2. A bearing retainer according to claim 1, wherein: the diameter of the rotation center of the retainer is smaller than that of the rotation center of the spherical rolling body.

3. A bearing retainer according to claim 1, wherein: and an included angle is formed between a connecting line of each contact point and the rotation center of the pocket and the contact surfaces of the two half retainers.

4. A bearing retainer according to claim 1, wherein: the radius of the concave spherical surface is larger than that of the spherical rolling body, and the spherical center of the concave spherical surface and the rotation center of the pocket are eccentrically arranged.

5. A bearing retainer according to claim 1, wherein: the two half-cages are fixed together by fasteners.

6. A bearing retainer according to claim 5, wherein: and connecting parts are arranged among the plurality of concave parts on each half holder, through holes are radially formed in the connecting parts, and the fastening pieces are fixedly connected in the through holes.

7. A bearing retainer according to claim 5, wherein: the fasteners are rivets.

8. A bearing retainer according to any one of claims 1 to 7, wherein: the spherical rolling bodies are steel balls.