CN1480655A

CN1480655A - Two pieces set of spherical bearing

Info

Publication number: CN1480655A
Application number: CNA03146758XA
Authority: CN
Inventors: 吴德炳; 吴海涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-24
Filing date: 2003-06-24
Publication date: 2004-03-10

Abstract

A three-element spherical bearing made of high-sulfur alloy steel is composed of external ring, internal ring and an internal straight sleeve which is fit with said internal ring in slide mode. Its advantages are low abrasion, not seizing, and long service life increased by 5 times.

Description

The three-piece spherical bearing

Technical field

The present invention relates to a kind of bearing that under high temperature condition, uses.

Background technique

The spherical bearing of prior art is formed (being called for short the Two Piece Set spherical bearing) by outer ring and inner ring, and inner ring adopts the stationary fit assembling with axle.The shortcoming of this bearing is, when temperature is higher, because the axial expansion of axle extends and bending deflection, drive bearing inner race and move dislocation, the material that is adopted owing to axle and bearing enclose is different again, the expansion coefficient difference, thus cause when meeting thermal expansion, bearing inner race and outer ring two sphere centre lines depart from, cause sphere single face or a certain line point wearing and tearing aggravation, thereby the working life of reducing bearing the bearing locking is damaged (referring to Fig. 3, Fig. 4, Fig. 5).This problem is done in the spherical bearing of material comparatively outstanding at the high-sulfur alloy steel (Chinese patent ZL91108671.4) of request for utilization people invention, had a strong impact on this new material and applied in the spherical bearing field.

Summary of the invention

The purpose of this invention is to provide a kind of three-piece spherical bearing that under the condition of high temperature, still can make sphere well contact and work well.

The object of the present invention is achieved like this: a kind of three-piece spherical bearing, comprise outer ring, inner ring, and it is characterized in that: also have an inner ring directly to overlap in inner ring, inner ring directly overlaps with inner ring and adopts the sliding matching mode assembling.

Purpose of the present invention can also realize like this: inner ring directly cover, inner ring and outer ring all adopts the high-sulfur alloy steel self-lubricating abrasion-proof material.

Inner ring directly overlaps and the matching gap of inner ring is 0.2-2.0mm, and the matching gap of inner ring and outer ring is 0.25-2.0mm.

The present invention has following advantage: solved under the condition of high temperature because the prolonged expansion of axle and bending deflection cause the spherical bearing wearing and tearing inhomogeneous the problem of promptly bearing single face that the axial force of a certain direction causes or single line point wearing and tearing aggravation and making bearing locking so that bearing failure seriously the time.Through being the bearing test of material with the high-sulfur alloy steel, the result proves that can improve 5 times or more than Two Piece Set spherical bearing its working life.

Description of drawings

Fig. 1 structural representation of the present invention

Fig. 2 is the left view of Fig. 1

Fig. 3 is a prior art Two Piece Set spherical bearing structural representation

Fig. 4 is being subjected to the right structural representation during lopsided wear during axial force for the Two Piece Set spherical bearing

Fig. 5 is Two Piece Set spherical bearing structural representation during lopsided wear when being subjected to left side axial force

Embodiment

Problem during the high-sulfur alloy steel new material that The present invention be directed to claimant invention is used puts forward, but uses the spherical bearing that is not limited to the high-sulfur alloy steel material.Traditional Two Piece Set spherical bearing runs into some special problems in the application that with the high-sulfur alloy steel is material, the one, bearing enclose matching gap problem, obtained the achievement in research in best fit gap through claimant's repetition test, see Chinese patent ZL01208617.7 for details, another problem is to be subjected to responsive to axial force bearing ball surface wear inhomogeneous, and the bearing locking finally causes bearing failure when serious.This problem may not given prominence in the Two Piece Set spherical bearing of common material uses, but it is comparatively outstanding in use with high temperature condition and the high-sulfur alloy steel self-lubricating abrasion-resistant spherical bearing that runs up, because the outstanding advantage of high-sulfur alloy steel self-lubricating abrasion-resistant bearing is high temperature resistant, bite-resistant, long service life, if can not address this problem, above-mentioned advantage will can not obtain performance in spherical bearing, and then will have limited this new material applying in spherical bearing.

Through claimant's repetition test,,, this problem is satisfactorily resolved by in inner ring, increasing the mode that an inner ring directly overlaps in conjunction with the unique self-lubricating property characteristics of high-sulfur alloy steel material.Structure of the present invention is, comprises outer ring 3, inner ring 2, in inner ring 2, increase by an inner ring and directly overlap 1, inner ring directly overlap 1 and inner ring 2 be that sliding matching mode assembles; Inner ring 2, outer ring 3 and inner ring directly overlap 1 can all adopt the high-sulfur alloy steel material; Inner ring directly overlaps and the matching gap of inner ring is 0.2-2.0mm, and the matching gap of inner ring and outer ring is 0.25-2.0mm, and such matching gap has best using effect for the spherical bearing of high-sulfur alloy steel material.

In the use, inner ring directly overlaps with axle and is the stationary fit assembling, the straight cover of inner ring can move with axle when condition of high temperature lower shaft prolonged expansion, and inner ring is because of directly overlapping for being slidingly matched with inner ring, then do not move with axle, and still keep contacting of whole sphere with the outer ring, and can not cause the phenomenon of lopsided wear aggravation, more can not cause the consequence of bearing locking.

Claims

1, a kind of three-piece spherical bearing comprises outer ring (3), inner ring (2), it is characterized in that: also have an inner ring directly to overlap (1) in inner ring (2), inner ring directly overlaps (1) and adopts the sliding matching mode assembling with inner ring (2).

2, three-piece spherical bearing according to claim 1 is characterized in that: inner ring directly overlaps (1), inner ring (2) and outer ring (3) all adopt the high-sulfur alloy steel self-lubricating abrasion-proof material.

3, three-piece spherical bearing according to claim 1 and 2 is characterized in that: the matching gap that inner ring directly overlaps (1) and inner ring (2) is 0.2-2.0mm, and inner ring (2) with the matching gap of outer ring (3) is: 0.25-2.0mm.