CN201269265Y

CN201269265Y - Prismatic bearing holder

Info

Publication number: CN201269265Y
Application number: CNU2008202204713U
Authority: CN
Inventors: 葛世东; 梁波; 臧稳通; 史群玲; 姜维
Original assignee: Luoyang Bearing Science and Technology Co Ltd
Current assignee: Luoyang Bearing Science and Technology Co Ltd
Priority date: 2008-10-21
Filing date: 2008-10-21
Publication date: 2009-07-08
Anticipated expiration: 2018-10-21

Abstract

The utility model provides a multi-prismatic bearing retainer, which is characterized in that: a tangent line to the outside diameter and vertical to the center line is made at the center line of each pocket of the round retainer; the arc height of the tangent line to the outside diameter is designed as h; the intersecting points of the tangent lines to the outside diameters at the center lines of all pockets are connected with each other to form a multi-prismatic shape; and the arc height h of the tangent line to the outside diameter of the multi-prismatic retainer is controlled between 0.1 and 0.3mm. The small arc height h ensures the smooth running of the multi-prismatic retainer, and the enlarged thickness in the intersecting points of the tangent lines leads to the enlarged contact rigidity. In addition, the multi-prismatic structure of the retainer ensures a two-point contact with guide ribs for the bearing ring under the state of stable contact. The two-point contact can on the one hand obviously strengthen the supporting stability of the retainer and improve the stability of high-speed running of the retainer, and on the other hand reduce the contact stress of the contact points of the retainer and lessen the wear and friction of the retainers. Simultaneously, the straight edges of the tangent lines also can seal parts of lubricants under the contacting state, so as to improve the lubrication states of the two contact points of the multi-prismatic retainer.

Description

Many prismatics retainer

Technical field

The utility model belongs to technical field of bearings, especially a kind of many prismatics retainer.

Background technique

Fig. 1, the 2nd, the retainer that present angular contact ball bearing is used always, the mainly straight pocket hole circle shape solid cage made from engineering plastics such as bakelite, nylon.This straight pocket hole circle shape solid cage was used more than 100 year, and all basically ball bearing solid cage profiles are round structure, and the advantage of this structure is that machine shaping is easy, and cost is lower.

But along with the bearing rotating speed becomes more and more higher, the unsettled shortcoming of high speed performance that the retainer of this structure exists is also more and more obvious.The outer guidance mode that high-speed bearing generally all adopts the retainer external diameter to contact with the bearing outer ring rib, because the point of contact of circular solid cage external diameter and bearing guiding rib is a single line, so under the condition of running up, owing to be subjected to the high velocity impact of steel ball, retainer contacts down on one point and is difficult to keep balance, wild effect such as be very easy to occur the retainer whirling motion and utter long and high-pitched sounds has influence on the noise and the working life of bearing greatly.

Summary of the invention

For addressing the above problem, the utility model has designed a kind of many prismatics retainer, this retainer adopts prismatic structure, it is 2 contacts with contacting of bearing outer ring, 2 contacts can improve the stability that runs up of retainer greatly, improved the contact strength of retainer and bearing guiding rib on the one hand, reduce the juxtaposition metamorphose of retainer, its planar section also can resident a part of lubricant oil and lubricating grease on the other hand, effectively improve the lubricating status of retainer and guiding rib point of contact, reduce the wearing and tearing of retainer external diameter, have boundless application prospect.

For achieving the above object, the utility model adopts following technological scheme:

Described many prismatics retainer, be to do an external diameter tangent line perpendicular to center line at each pocket centerline hole of circular retainer, the camber of external diameter tangent line is h, with the continuous formation of the external diameter point of intersection of tangents of all pocket centerline holes prismatic more than, the external diameter tangent line camber h of many prismatics retainer is controlled at 0.1-0.3mm again.

Because adopt aforesaid technological scheme, the utility model produces following good effect:

1, adopts many prismatics form structure, improve the contact stiffness of retainer, reduce the juxtaposition metamorphose of retainer.

2, many prismatics profile makes retainer external diameter and bearing guiding rib form 2 supports, has lowered contact stress, has improved the stability that runs up of retainer.

3, because some lubricating grease and lubricant oil can be sealed in the space that straight flange forms, can improve the lubricating status of many prismatics retainer point of contact, reduce the surface abrasion of retainer, prolong the working life of bearing.

4, the external diameter tangent line removal amount basic controlling of many prismatics retainer can not influence the running fluency of many prismatics retainer at 0.1-0.3mm.

Description of drawings

Fig. 1 is the retainer structural representation;

Fig. 2 is that the C-C of Fig. 1 is to sectional view;

Fig. 3 is many prismatics retainer structural representation of the present utility model;

Fig. 4 is that the D-D of Fig. 3 is to sectional view;

Among the above-mentioned figure: the circular retainer of 1-; Many prismatics of 2-retainer.

Embodiment

In conjunction with Fig. 3,4, many prismatics retainer of the present utility model, be to do an external diameter tangent line perpendicular to center line at each pocket centerline hole of circular retainer, the camber of external diameter tangent line is h, with the continuous formation of the external diameter point of intersection of tangents of all pocket centerline holes prismatic more than, the external diameter tangent line camber h of many prismatics retainer 2 is controlled at 0.1-0.3mm again.

Because the thickness at all point of intersection of tangents places obtains increasing, and makes its contact stiffness also obtain corresponding increase, has guaranteed the integral rigidity of many prismatics retainer 2.

Because many prismatic structure of retainer, make contacting stablizing of itself and circular bearing ring guiding rib be 2 contacts under the contact condition, 2 contacts can obviously strengthen the stability of strutting system of retainer on the one hand, improve the stability that runs up of retainer, reduced the contact stress of retainer point of contact on the other hand, reduce the fretting wear of retainer, the tangent line straight flange can also seal a part of oiling agent under contact condition simultaneously, in order to the lubricating status that improves many prismatics retainer 2 point of contact.

The high h of external diameter tangent line of many prismatics retainer 2 is controlled at 0.1-0.3mm, because h numerical value is very little, has effectively guaranteed the running fluency of many prismatics retainer 2.

Many prismatics retainer of the present utility model is-40---under 100 ℃ of temperature ranges and rotating speed in 6000-15000 rev/mins of scopes, can satisfy the usage requirement of high-speed electric expreess locomotive comprehensively, and performance obviously is better than adopting the bearing of typical circular retainer 1, and can reach 20000 hours the continuous running life of disposable thin oil lubricant.

Claims

1, a kind of many prismatics retainer, it is characterized in that: be to do an external diameter tangent line perpendicular to center line at each pocket centerline hole of circular retainer, the camber of external diameter tangent line is h, with the continuous formation of the external diameter point of intersection of tangents of all pocket centerline holes prismatic more than, the external diameter tangent line camber h of many prismatics retainer (2) is controlled at 0.1-0.3mm again.