CN206918081U

CN206918081U - Annular bearing with rolling contact with oval spherical ball

Info

Publication number: CN206918081U
Application number: CN201720426441.7U
Authority: CN
Inventors: 施天津; 陈志婷
Original assignee: FK Bearing Group Co Ltd
Current assignee: FK Bearing Group Co Ltd
Priority date: 2017-04-21
Filing date: 2017-04-21
Publication date: 2018-01-23
Anticipated expiration: 2027-04-21

Abstract

A kind of annular bearing with rolling contact with oval spherical ball, it includes outer ring, inner ring, retainer and multiple balls, inner ring is coaxial to be arranged in outer ring, retainer is cylindrical, for retainer between outer ring and inner ring, ball is spherical in ellipse, is offered and the embedding hole of ball quantity identical around central axis circular array in the side wall of retainer, multiple balls correspond being embedded in embedding hole of matching, and centerline axis parallel of the major axis of the spherical ball of multiple ellipses with retainer；On the madial wall of outer ring outer ring groove annular in shape and inner ring groove are offered with mutually corresponding respectively on the lateral wall of inner ring, outer ring groove is identical with the cross section profile of inner ring groove, curved profile of the cross section profile of outer ring groove and inner ring groove with the short axle both ends of oval spherical ball matches, and the projection of short axle both ends difference Corresponding matching is in outer ring groove and inner ring groove on ball.

Description

Annular bearing with rolling contact with oval spherical ball

Technical field

A kind of bearing arrangement technical field is the utility model is related to, more particularly to a kind of radial direction with oval spherical ball Rolling bearing.

Background technology

Annular bearing with rolling contact generally comprises outer ring, inner ring, retainer and rolling element.Needle bearing is that a kind of rolling element is Columned rolling bearing, with respect to its diameter, rolling element was not only thin but also long.This rolling element is referred to as needle roller.Although with less Section, needle bearing still has higher load-taking capacity, the needle bearing needle roller long equipped with thin, therefore radial structure is tight Gather, when its internal diameter size and load-carrying ability identical with other types of bearings, minimum outer diameter, especially suitable for radially installed size by The supporting structure of limitation.But the part due to being contacted on needle roller with the lateral surface of outer ring medial surface and inner ring is the straight of radial direction Linear contact lay, when by larger radial load, or during by radial impact, needle roller deformation or precision is easily caused to reduce, So as to cause bearing arrangement to damage, the service life of bearing is influenceed.

Utility model content

The purpose of this utility model is to provide a kind of annular bearing with rolling contact with oval spherical ball, and it to be solved Technical problem be：The ball of spherical shape can occupy larger radial space in traditional ball bearing, cause bearing radially Section is big；And needle bearing is then due to being straight contact stress when needle roller is contacted with inner ring and outer ring, therefore by radial load During excessive or impulsive force, the even deformation of needle roller precision decreasing concentration is easily caused, the structure precision of bearing is influenceed, shortens bearing Service life.

In order to solve the above technical problems, the utility model provides a kind of annular bearing with rolling contact with oval spherical ball, It includes outer ring, inner ring, retainer and multiple balls, and the inner ring is coaxial to be arranged in the outer ring, the retainer Cylindrical, for the retainer between the outer ring and inner ring, the internal diameter of the outer ring is more than the external diameter of the retainer, The external diameter of the inner ring is less than the internal diameter of the retainer, and the ball is spherical in ellipse, is surrounded in the side wall of the retainer Central axis circular array offers corresponds the embedding of matching with the embedding hole of ball quantity identical, multiple balls Put in the embedding hole, and centerline axis parallel of the major axis of the spherical ball of multiple ellipses with the retainer；Institute State and offer outer ring groove annular in shape and inner ring ditch with mutually corresponding respectively on the lateral wall of inner ring on the madial wall of outer ring Groove, the outer ring groove is identical with the cross section profile of inner ring groove, the cross section profile of the outer ring groove and inner ring groove with The curved profile at the short axle both ends of the oval spherical ball matches, difference Corresponding matching in short axle both ends on the ball Projection is in the outer ring groove and inner ring groove.

It is preferable over：It is not less than 2 in the ratio between the major axis of the oval spherical ball and short axle：1.

It is preferable over：The retainer is made up of hard plastics, and the bore in the embedding hole both ends aperture is less than the rolling Pearl is in the projected outline of short-axis direction, and the hole wall indent in the embedding hole matches to the outline of the ball.

Compared with prior art, the beneficial effects of the utility model are：Using reaching in oval spherical ball and needle roller Bearing has the same effect for reducing bearing radial section, and because radial direction pressure-bearing direction is the short-axis direction of oval ball For the arc of convex confession, the stress intensity of ball can be effectively lifted, is avoided because radial load is big or radially rushed The problem of ball deformation is caused when hitting, the advantages of being effectively combined ball bearing and needle bearing.

Brief description of the drawings

Fig. 1 is radial direction cross section structure diagram of the present utility model.

Fig. 2 is axial sectional structure partial schematic diagram of the present utility model.

Embodiment

Below with reference to accompanying drawing 1,2 and preferred embodiment to the utility model proposes one kind there is oval spherical ball Annular bearing with rolling contact be described in greater detail.

The utility model provides a kind of annular bearing with rolling contact with oval spherical ball, and it includes outer ring 1, inner ring 2, protected Frame 3 and multiple balls 4 are held, the inner ring 2 is coaxial to be arranged in the outer ring 1, and the retainer 3 is cylindrical, described For retainer 3 between the outer ring 1 and inner ring 2, the internal diameter of the outer ring 1 is more than the external diameter of the retainer 3, the inner ring 2 external diameter is less than the internal diameter of the retainer 3, and the ball 4 is spherical in ellipse, and center is surrounded in the side wall of the retainer 3 Axis circular array offers corresponds the embedding of matching with the embedding hole 31 of the quantity identical of ball 4, multiple balls 4 Put in the embedding hole 31, and central axis of the major axis of the spherical ball 4 of multiple ellipses with the retainer 3 is put down OK；On the madial wall of the outer ring 1 outer ring groove 11 annular in shape is offered with mutually corresponding respectively on the lateral wall of inner ring 2 With inner ring groove 21, the outer ring groove 11 is identical with the cross-sectional profiles of inner ring groove 21, the outer ring groove 11 and inner ring Curved profile of the cross-sectional profiles of groove 21 with the short axle both ends of the oval spherical ball 4 matches, the ball 4 The projection of upper short axle both ends difference Corresponding matching is in the outer ring groove 11 and inner ring groove 21；In the oval spherical rolling The ratio between the major axis of pearl 4 and short axle are not less than 2：1.

Further, the retainer 3 is made up of hard plastics, and the bore in the embedding both ends aperture of hole 31 is less than described Ball 4 is in the projected outline of short-axis direction, and the hole wall indent in the embedding hole 31 matches to the outline of the ball 4.

Described in synthesis, the technical solution of the utility model can complete above-mentioned purpose of utility model with sufficiently effective, and Structural principle of the present utility model and the principle of work and power have all sufficiently been verified in embodiment, and can reach expected work( Effect and purpose, and embodiment of the present utility model can also enter line translation according to these principles, therefore, the utility model includes one Cut all replacement contents in the range of being previously mentioned in claim.Any institute in present utility model application the scope of the claims The equivalence changes of work, all within the scope of the claims of category this case application.

Claims

1. a kind of annular bearing with rolling contact with oval spherical ball, it includes outer ring, inner ring, retainer and multiple balls, The inner ring is coaxial to be arranged in the outer ring, and the retainer is cylindrical, the retainer be located at the outer ring with it is interior Between circle, the internal diameter of the outer ring is more than the external diameter of the retainer, and the external diameter of the inner ring is less than the internal diameter of the retainer, It is characterized in that：The ball is spherical in ellipse, is offered in the side wall of the retainer around central axis circular array With the embedding hole of ball quantity identical, multiple balls one-to-one corresponding matchings are embedded in the embedding hole, and multiple ellipse Centerline axis parallel of the major axis of the ball of spheroidal with the retainer；On the madial wall of the outer ring with inner ring It is mutually corresponding respectively on lateral wall to offer outer ring groove annular in shape and inner ring groove, the outer ring groove and inner ring groove Cross section profile it is identical, the short axle two of the cross section profile of the outer ring groove and inner ring groove with the oval spherical ball The curved profile at end matches, and the projection of short axle both ends difference Corresponding matching is in the outer ring groove and inner ring ditch on the ball In groove.

2. there is the annular bearing with rolling contact of oval spherical ball as claimed in claim 1, it is characterised in that：In oval spherical The ratio between the major axis of the ball and short axle are not less than 2：1.

3. there is the annular bearing with rolling contact of oval spherical ball as claimed in claim 2, it is characterised in that：The retainer is Hard plastics are made, and the bore in the embedding hole both ends aperture is less than projected outline of the ball in short-axis direction, and institute Hole wall indent to the outline with the ball for stating embedding hole matches.