CN201487050U

CN201487050U - Tapered roller bearing

Info

Publication number: CN201487050U
Application number: CN200920191753XU
Authority: CN
Inventors: 刘宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-20
Filing date: 2009-08-20
Publication date: 2010-05-26
Anticipated expiration: 2019-08-20

Abstract

A tapered roller bearing comprises an outer ring, a rolling body, a holding frame and an inner ring, wherein an outer ring raceway with a logarithmic curve convexity is arranged on the inner surface of the outer ring; an inner ring raceway with a logarithmic curve convexity is arranged on the outer surface of the inner ring; and the surface of the rolling body is a convexity of a logarithmic curve. The utility model has the benefits that the tapered roller bearing has high precision and long service life, the rolling body with the logarithmic curve convexity and the raceway with the logarithmic curve convexity can effectively avoid the concentration of the stress at the end part of the rolling body in contact with the raceway, the tapered roller bearing is processed by optimal quartic convexities and the logarithm convexity, thereby prolonging the service life of the bearing and meeting the requirement for long service life of the bearing for most users.

Description

A kind of tapered roller bearing

Technical field

The utility model relates to a kind of tapered roller bearing, especially a kind of tapered roller bearing that is used for automobile axle.

Background technique

At present, the application of bearing is very extensive.But, also do not have four domes awl roller automobile bearing on the market.In the last few years, the user has proposed more strict requirement to the life-span of tapered roller bearing, this not only relates to material, heat treatment, manufacture level, tooling device, and relate to the design of bearing, particularly rolling element and raceway convex, convexity amount and best convexity matching relationship determines, but the tapered roller bearing that does not also have the best convexity of highi degree of accuracy at present, the rolling element of bearing all exists stress to concentrate at present, has influence on the life-span of bearing.

Summary of the invention

The utility model will solve the shortcoming of above-mentioned prior art, a kind of four dome taper roller bearings with reasonable logarithmic curve convexity are provided, has suitable logarithm convexity form, the convexity of rolling element and raceway has optimum matching relation, logarithmic curve convexity rolling element can prevent effectively that with the logarithmic curve crowned raceway producing stress in the end that rolling element contacts with raceway concentrates, thus the working life of improving bearing.

The utility model solves the technological scheme that its technical problem adopts: this tapered roller bearing, comprise outer ring, rolling element, retainer, inner ring, and the internal surface of outer ring is provided with the outer ring raceway of band logarithmic curve convexity; The outer surface of inner ring is provided with the inner ring raceway of band logarithmic curve convexity; The rolling element surface is a logarithmic curve convexity face.The logarithmic curve convexity is meant that the surface of each parts through certain type of repairing, is logarithmic curve convexity shape curved surface.Like this, the end that rolling element is contacted with raceway stress do not occur and concentrates.

In the embodiment of optimum, the rolling element convexity is between 0.0024mm～0.008mm, and the convexity of inner ring raceway is between 0.005mm～0.010mm.When processing rolling element and track convex degree, should limit on the upper side, the convexity working control of rolling element in the convexity working control of 0.006mm～0.008mm, raceway at 0.005mm～0.010mm.

Further, the inner ring raceway both sides are provided with the inner ring oil duct, can reduce the wearing and tearing of bearing.Be provided with rolling element between inner ring and the outer ring, rolling element is the tapered roller of logarithmic curve convexity processing, and retainer wraps in outside the rolling element, and rolling element is fixed in the bearing.

The beneficial effects of the utility model are: the utility model is high-accuracy, long-life tapered roller bearing, logarithmic curve convexity rolling element, logarithmic curve crowned raceway can prevent effectively that producing stress in the end that rolling element contacts with raceway concentrates, four convexitys, the processing of logarithm convexity with the best, improved the life-span of bearing, satisfied the demand of users bearing long-life.

Description of drawings

Fig. 1 is a structure sectional view of the present utility model;

Fig. 2 is the structure sectional view of the utility model inner ring;

Fig. 3 is the local structure for amplifying sectional view of A part among Fig. 2;

Fig. 4 is the utility model outer ring structure sectional view;

Fig. 5 is the utility model retainer structural representation;

Fig. 6 is the utility model rolling element structural representation.Description of reference numerals: outer ring 1, outer ring raceway 1-1, inner ring 2, inner ring raceway 2-1, retainer 3, maintenance groove 3-1, rolling element 4, oil duct 5.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

With reference to accompanying drawing: the tapered roller bearing in the present embodiment, comprise outer ring 1, rolling element 4, retainer 3, inner ring 2, the internal surface of outer ring 1 is provided with the outer ring raceway 1-1 of band logarithmic curve convexity, the outer surface of inner ring 2 is provided with the inner ring raceway 2-1 of band logarithmic curve convexity, and rolling element 4 surfaces are logarithmic curve convexity face.Inner ring raceway 2-1 both sides are provided with inner ring oil duct 5, reduce the wearing and tearing of bearing, are provided with rolling element 4 between inner ring 2 and the outer ring 1, rolling element 4 is the tapered roller of logarithm convexity processing, retainer 3 surfaces are the convexity face, and retainer 3 wraps in outside the rolling element 4, and rolling element 4 is fixed in the bearing.Retainer 3 is provided with and keeps groove 3-1.

Bearing is when underloading, and effective contact length of rolling element 4 is 60%～70% of a roller length, during heavy duty, stress do not occur and concentrates.In order to reach better effect, the rolling element convexity is between 0.0024mm～0.008mm, and the convexity of inner ring raceway 2-1 is between 0.005mm～0.010mm.Should limit on the upper side when processing rolling element 4 and track convex degree, the convexity working control of rolling element 4 is at 0.006mm～0.008mm, and the convexity working control of raceway is at 0.005mm～0.010mm.Like this, the end that contacts with raceway of rolling element 4 stress just can not occur and concentrates.The utility model structure optimization is reasonable, is high-accuracy, long-life tapered roller bearing.It adopts four best convexitys, the processing of logarithm convexity, in the life-span of having improved bearing, has satisfied the demand of vast support to the bearing long-life.

Though the utility model illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.

Claims

1. a tapered roller bearing comprises outer ring (1), rolling element (4), retainer (3), inner ring (2), it is characterized in that: the internal surface of outer ring (1) is provided with the outer ring raceway (1-1) of band logarithmic curve convexity; The outer surface of inner ring (2) is provided with the inner ring raceway (2-1) of band logarithmic curve convexity; Rolling element (4) surface is a logarithmic curve convexity face.

2. tapered roller bearing according to claim 1 is characterized in that: described retainer (3) surface is the convexity face.

3. tapered roller bearing according to claim 1 is characterized in that: the surperficial logarithmic curve convexity of described rolling element (4) is between 0.0024mm～0.008mm, and the logarithmic curve convexity of inner ring raceway is between 0.005mm～0.010mm.

4. tapered roller bearing according to claim 1 is characterized in that: described inner ring raceway (2-1) two ends up and down is provided with inner ring oil duct (5).

5. tapered roller bearing according to claim 1 is characterized in that: described rolling element (4) is located between inner ring (2) and outer ring (1).

6. tapered roller bearing according to claim 1 and 2 is characterized in that: described retainer (3) wraps in outside the rolling element (4).