CN210739141U

CN210739141U - Chamfering structure of four-row cylindrical roller bearing for rolling mill supporting roller

Info

Publication number: CN210739141U
Application number: CN201921092294.XU
Authority: CN
Inventors: 袁星辉; 何召集; 李俊强; 刘凯
Original assignee: Luoyang Huigong Bearing Technology Co ltd
Current assignee: Luoyang Huigong Bearing Technology Co ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-06-12
Anticipated expiration: 2029-07-12

Abstract

The utility model provides a rolling mill is four-row cylindrical roller bearing's for backing roll chamfer structure, includes two bearing inner circles that are in the same place of closing up, circles in every bearing and all is equipped with two outer chamfers outer chamfer still is equipped with the abrasionproof chamfer towards one side of outside raceway surface, and the contained angle A that abrasionproof chamfer and outer raceway surface were shown is less than outer chamfer and the contained angle B that outer raceway surface was shown. The utility model discloses divide into two sections of different chamfers with the assembly guide face of bearing inner circle for the bearing outer assembly is at first tentatively fixing a position through the great guide face of chamfer when the inner circle raceway of packing into, again through the less guide face of chamfer pinpoint, through two steps of guide positioning, greatly reduced the axial mar to rolling element surface production in the assembling process, thereby play the purpose that improves the bearing life-span.

Description

Chamfering structure of four-row cylindrical roller bearing for rolling mill supporting roller

Technical Field

The utility model belongs to the technical field of the bearing technique and specifically relates to a rolling mill is chamfer structure of four-row cylindrical roller bearing for backing roll.

Background

The four-row cylindrical roller bearing used in the existing rolling mill, as shown in fig. 1, includes two outer bearing rings, two inner bearing rings, two side retainer rings, a middle retainer ring, and four-row roller sets, where the inner bearing rings and the roller sets are separable. When the bearing is installed, the two bearing inner rings are heated and then are hot-installed on a shaft, and other bearing assemblies are installed in a bearing box and then are hoisted to a roller with the bearing inner rings installed.

The rolling mill bearing has large self weight, so that the surface of a rolling element of a roller group is easy to collide and rub with the outer raceway surface of the bearing inner ring during assembly, and the surface of the rolling element generates axial scratches. The occurrence probability of such axial scratches is high, and the service life of the bearing is seriously affected by such axial scratches. How to avoid the installation scratch of the rolling mill bearing is a problem to be solved urgently by each bearing manufacturer and user manufacturer.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough among the background art, the utility model discloses a rolling mill is chamfer structure of four-row cylindrical roller bearing for backing roll.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides a rolling mill is four-row cylindrical roller bearing's for backing roll chamfer structure, includes two bearing inner circles that are in the same place of closing up, circles in every bearing and all is equipped with two outer chamfers outer chamfer still is equipped with the abrasionproof chamfer towards one side of outside raceway surface, and the contained angle A that abrasionproof chamfer and outer raceway surface were shown is less than outer chamfer and the contained angle B that outer raceway surface was shown.

Preferably, the included angle a is 5 ° and the included angle B is 11 ° 20'.

Owing to adopt above-mentioned technical scheme, compare the background art, the utility model discloses following beneficial effect has:

the utility model discloses divide into two sections of different chamfers with the assembly guide face of bearing inner circle for the bearing outer assembly is at first tentatively fixing a position through the great guide face of chamfer when the inner circle raceway of packing into, again through the less guide face of chamfer pinpoint, through two steps of guide positioning, greatly reduced the axial mar to rolling element surface production in the assembling process, thereby play the purpose that improves the bearing life-span.

Drawings

FIG. 1 is a schematic view of a rolling mill bearing construction;

fig. 2 is a partially enlarged schematic view of fig. 1.

In the figure: 1. a bearing inner race; 1.1, chamfering; 1.2, anti-abrasion chamfer angles.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

The utility model provides a rolling mill is chamfer structure of four-row cylindrical roller bearing for backing roll, as shown in figure 2, including two bearing inner race 1 that are close to together, all be equipped with two outer chamfers 1.1 on every bearing inner race 1 one side of outer chamfer 1.1 orientation outer raceway surface still is equipped with abrasionproof chamfer 1.2, and the contained angle A that abrasionproof chamfer 1.2 and outer raceway surface were be is less than outer chamfer 1.1 and the contained angle B that outer raceway surface was. Wherein, the angle A between the anti-abrasion chamfer 1.2 and the outer raceway surface is 5 degrees, and the angle B between the outer chamfer 1.1 and the outer raceway surface is 11 degrees and 20 degrees.

The utility model discloses divide into L1, L2 two sections with the assembly guide face of bearing inner circle 1, the angle is 5 and 11 respectively for the bearing outer assembly is when the inner circle raceway of packing into, at first tentatively fixes a position through the guide face of 11 20', and the guide face of passing through 5 again carries out the accurate positioning, through two steps guide positioning, greatly reduced the axial mar to rolling element surface production in the assembling process, thereby play the purpose that improves the bearing life-span.

The part of the utility model not detailed is prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a rolling mill is chamfer structure of four-row cylindrical roller bearing for backing roll, includes two bearing inner race (1) that closely lean on together, all is equipped with two outer chamfers (1.1), characterized by on every bearing inner race (1): one side of the outer chamfer (1.1) facing the outer raceway surface is also provided with an anti-abrasion chamfer (1.2), and an included angle A formed by the anti-abrasion chamfer (1.2) and the outer raceway surface is smaller than an included angle B formed by the outer chamfer (1.1) and the outer raceway surface.

2. The chamfering structure of the four-row cylindrical roller bearing for a backup roll of a rolling mill according to claim 1, wherein: the included angle A is 5 degrees, and the included angle B is 11 degrees and 20 degrees.