TAPERED ROLLER BEARING AND METHOD OF DESIGNING SAME

Title:

TAPERED ROLLER BEARING AND METHOD OF DESIGNING SAME

Document Type and Number:

WIPO Patent Application WO/2010/122955

Kind Code:

A1

Abstract:

Provided is a tapered roller bearing which has an extended operating lifetime due to a reduction in the surface pressure or the stress at a contact part, and which reduces the amount of drop at the opposite ends of a roller, prevents machining defects in the raceway, and enhances machining efficiency. A method of designing the tapered roller bearing is also provided. The part of the rolling surface of a roller where a crown is formed comprises a contact part crowning portion (7) which comes into contact with the inner ring raceway (1a) within the axial range thereof, and a non-contact part crowning portion (8) which is outside of the axial range of the inner ring raceway (1a) and does not come into contact therewith. In the contact part crowning portion (7) and the non-contact part crowning portion (8), the generatrices extending in the axial direction of the roller are lines represented by different functions and are smoothly continuous at the contact points, and the curvature of the generatrix for the non-contact part crowning portion (8) is set smaller than the curvature of the generatrix for the contact part crowning portion (7) in the vicinity of the contact points.

Inventors:

FUJIWARA HIROKI (JP)

Application Number:

PCT/JP2010/056828

Publication Date:

October 28, 2010

Filing Date:

April 16, 2010

Export Citation:

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Assignee:

NTN TOYO BEARING CO LTD (JP)
FUJIWARA HIROKI (JP)

International Classes:

F16C33/36; F16C19/36

Foreign References:

JPH0312015U	1991-02-07
JP2008248993A	2008-10-16
JPH08232960A	1996-09-10
JPH04351314A	1992-12-07
JP2000346078A	2000-12-12
JP2001065574A	2001-03-16
JP2006052790A	2006-02-23

Other References: