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Self-aligning roller bearing

A technology of self-aligning roller bearings and rollers, which is applied in the direction of rolling contact bearings, etc., can solve the problems of shortening the service life of bearings, reducing hardness, harmful effects, etc., and achieve the goals of increasing friction coefficient, suppressing slip, and prolonging service life Effect

Inactive Publication Date: 2008-07-16
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This high temperature tempering process can promote the decomposition of retained austenite, but this process has a detrimental effect, making the hardness lower
Therefore, surface damage such as peeling etc. tends to occur on the inner ring, and thus the service life of the bearing is shortened

Method used

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  • Self-aligning roller bearing
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  • Self-aligning roller bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] Embodiments of the present invention will be described below with reference to the accompanying drawings. Herein, these examples each show only one example of the present invention, and should not be construed as being limited to these examples at all. In addition, design changes may be appropriately made to these embodiments within the scope of the present invention.

[0056] A first embodiment of the present invention will be described below with reference to FIGS. 1 to 12 .

[0057] Fig. 1 is an axial sectional view of a spherical roller bearing according to a first embodiment of the present invention. In FIG. 1 , a spherical roller bearing 10 according to a first embodiment of the invention has an inner ring 11 . Double-row tracks (hereinafter also referred to as “inner ring track surfaces”) 12 a , 12 b are formed on the outer peripheral surface of the inner ring 11 along the circumferential direction of the inner ring 11 . Furthermore, the spherical roller beari...

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PUM

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Abstract

An outer ring raceway surface (14) formed on the inner peripheral surface of an outer ring (13) has roughness higher than that of inner ring raceways (12a, 12b) of an inner ring (11). Average roughness (Ra) in the axial direction and circumferential direction of the outer ring raceway surface (14) is 0.1 mum <= Ra <= 0.5 mum in the ranges of b1 / (B / 2) <= 0.9 AND B2(B / 2) <= 0.9 and in the measurement length of 0.1 mm to 1.0 mm, with B the width of the outer ring (13), b1 and b2 the distances in the axial direction from both end surfaces of the outer ring (13). Roughness parameter (S) of the outer raceway surface is 0 <= S <= 20 mum.

Description

[0001] This case is a divisional application of an invention patent application with an application date of November 12, 2004, an application number of 200480020250.6, the applicant is Nippon Seiko Co., Ltd., and the invention name is "Spherical Roller Bearing". technical field [0002] The present invention relates to the extension of the service life of self-aligning roller bearings used in general industrial machinery, machine tools, vibrating screens, steel industry, motorcycle engines and the like. Background technique [0003] Spherical roller bearings have the advantage of being able to prevent abnormal loads and improve radial load capacity because the contact state of the rolling elements does not change even when the outer or inner rings are tilted due to assembly errors or impact loads. Thus, spherical roller bearings are widely used as various roll neck bearings in papermaking machines, vehicle bearings, various industrial bearings, and the like. [0004] Inciden...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C23/08
Inventor 植田光司植田彻
Owner NSK LTD