CN201513476U

CN201513476U - Raceway structure of short cylindrical roller bearing

Info

Publication number: CN201513476U
Application number: CN2009203107096U
Authority: CN
Inventors: 梁晓东
Original assignee: Ningbo Dake Bearing Co Ltd
Current assignee: Ningbo Dake Bearing Co Ltd
Priority date: 2009-09-18
Filing date: 2009-09-18
Publication date: 2010-06-23
Anticipated expiration: 2019-09-18

Abstract

The utility model discloses a raceway structure of a short cylindrical roller bearing, which comprises an inner ring and a raceway on the inner ring, wherein a raceway bus (21) of the raceway (20) of the bearing inner ring (10), which is on an axial section, is in a convex symmetrical arc-shaped structure relative to the center of the raceway. The convex height (22) of the raceway bus (21) relative to the raceway (20) is from 3 to 26mum. The raceway structure of the short cylindrical roller bearing in the structural type can effectively solve the problems of high noise and short service life of the bearing because a shaft is bended or matched improperly to cause angular deviation between the inner ring and the outer ring of the bearing so as to cause stress concentration in use; the noise is reduced, the service life of the bearing is prolonged, and simultaneously, noise pollution of the device on the environment is reduced.

Description

Cylindrical roller bearing raceway structure

Technical field

The utility model relates to a kind of bearing race structure, especially a kind of bearing race structure that relates to short columnar roller.

Background technique

Cylindrical roller bearing is one of parts commonly used in the modern production equipment, it mainly comprises outer ring, inner ring, roller and retainer, and cylindrical roller and raceway are line contact bearing, mainly bear radial load, radially bearing capacity is big, is applicable to bearing load and impact load; Retainer is equally spaced with rolling element, is distributed on the raceway circumference when preventing work to run foul of each other and rub between rolling element, and retainer itself does not bear load; Cylindrical roller rolling element and the friction of lasso rib are little, are suitable for high speed, limit rotation, and roller bearing is widely used in the middle of all kinds of industrial machines such as motor, lathe, oil, milling train handling machinery; Bearing race bears radial and axial joint load in bearing, cylindrical roller forms with raceway and contacts, angle between raceway and the bearing axis affects bearing and bears axially and the ability of radial load ratio, and common cylindrical roller bearing, raceway bus (21) in raceway (20) structure of bearing inner race (10) is designed to the straight line (see figure 2), and this infrastructure product occurs easily in use because of the deflection of axle or mates in improper the causing, angulation deviation between the outer ring and produce that stress is concentrated and to cause producing noise big, bad problem such as bearing life shortening occurs.

The model utility content

The utility model is for solving existing cylindrical roller bearing, occur easily in use because of the deflection of axle in the raceway structure or mate improperly causing angulation deviation between the inside and outside circle to produce stress to concentrate and cause producing that bad problem present situations such as noise is big, bearing life shortening provide that a kind of bearing that can reduce is concentrated using because of the deflection of axle or mate the improper stress that causes, the product noise diminishes simultaneously, the cylindrical roller bearing raceway structure that constant product quality and life-span prolong.

The utility model is to solve the problems of the technologies described above the concrete technological scheme that is adopted to be: a kind of cylindrical roller bearing raceway structure, comprise the raceway on inner ring and the inner ring, it is characterized in that: the raceway bus of the raceway of bearing inner race on axial section is provided with the raceway bus of certain convexity with respect to the symmetrical circular shape structure of raceway center for projection at the bearing race place.The concentrations of dispersive stress, can when bearing uses, allow because of the deflection of axle or mate improper cause angulation deviation between the inside and outside circle of bearing reach 4 ~ 6 ' scope, than common raceway structure can allow in use because of the deflection of axle or mate improper cause angulation deviation 2 ~ 3 between the inside and outside circle of bearing ' scope further enlarged, to avoid causing the concentrations of stress; Improperly cause the angulation deviation produces between the inside and outside circle stress to concentrate the problem that noise is big, bearing life shortens to occur thereby effectively solve to send out in use because of the deflection of axle or mate.

As preferably, the height of described raceway bus projection is 3～26um scope, according to the bearing of different internal structure, selects different height of projection amounts.Further disperse because of the deflection of axle or mate the improper angulation deviation range between the inside and outside circle that causes, improve bearing life.

As preferably, the width value that described raceway bus begins for the process groove joint from raceway and two ends with respect to the width of raceway projection.Further disperse because of the deflection of axle or mate the improper angulation deviation range between the inside and outside circle that causes, improve bearing life.

The beneficial effects of the utility model are: thus the cylindrical roller bearing raceway structure of this kind structure type can effectively solve in use because of the deflection of axle or mate and improperly causes the angulation deviation produces between the inside and outside circle of bearing stress to concentrate the problem that noise is big, bearing life shortens to occur; Reduce noise, improve bearing working life, also play improvement equipment to the pollution from environmental noise effect simultaneously.

Description of drawings:

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the structural representation of the preferred implementation of the utility model cylindrical roller bearing raceway structure.

Fig. 2 is the structural representation of common cylindrical roller bearing raceway structure.

Embodiment

Among the embodiment 1 shown in Figure 1, a kind of cylindrical roller bearing raceway structure comprises the raceway on bearing inner race and the inner ring, and the raceway bus 21 of the raceway 20 of bearing inner race 10 on axial section adopts the symmetrical circular shape structure of projection with respect to the raceway center.The height 22 of its protruding raceway bus 21 relative raceway 20 projectioies is adopted as the preferred heights value of 4 ~ 7um.The width 23 of raceway bus 21 projectioies that it is protruding is with the centrosymmetric measurement width value of raceway, is adopted as the width value of 8mm.

Among the embodiment 2, the height of projection 22 of described raceway bus 21 is 16 ~ 22um, and the width 23 of raceway bus 21 projectioies that it is protruding is with the centrosymmetric measurement width value of raceway, is adopted as the width value of 33mm, and all the other are identical with embodiment 1.

Claims

1. a cylindrical roller bearing raceway structure comprises the raceway on bearing inner race and the inner ring, it is characterized in that: the raceway bus (21) of the raceway (20) of bearing inner race (10) on axial section is with respect to the symmetrical circular shape structure of raceway center for projection.

2. according to the described cylindrical roller bearing raceway of claim 1 structure, it is characterized in that: described raceway bus (21) height (22) of raceway (20) projection relatively is 3 ~ 26um.

3. according to claim 1 or 2 described cylindrical roller bearing raceway structures, it is characterized in that: described raceway bus (21) is with respect to the width value of the protruding width (23) of raceway (20) for beginning from raceway and process groove joint, two ends.