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Title:
OBLIQUE CONTACT BALL BEARING AND TURBOCHARGER
Document Type and Number:
WIPO Patent Application WO/2005/073575
Kind Code:
A1
Abstract:
An oblique contact ball bearing (2) where the curvature radius of a raceway (21) of an outer ring (10) reduces toward the bottom (21A) of the raceway (21), the curvature radius being defined in a cross-section of the outer ring (10) cut in a plane including the center axis of the outer ring (10). According to this structure, the distance &Dgr x1 between the bottom (21A) of the raceway (21) of the outer ring (10) and balls (12) can be made greater without increasing the angle Ѳ of contact of the balls (12) than the case where the curvature radius of the raceway (21) is constant. Even if a temperature difference occurs between an inner ring and the outer ring, clearance clogging can be avoided and the balls are smoothly rotated to prevent early separation.

Inventors:
ITO IKUO (JP)
Application Number:
PCT/JP2005/001099
Publication Date:
August 11, 2005
Filing Date:
January 27, 2005
Export Citation:
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Assignee:
KOYO SEIKO CO (JP)
ITO IKUO (JP)
International Classes:
F16C19/16; F16C19/34; F16C19/54; F16C25/08; F16C33/58; F16C35/06; F02B39/00; (IPC1-7): F16C33/58; F16C19/16; F02B39/00
Foreign References:
JP2002089570A2002-03-27
JP2002098158A2002-04-05
JP2001208080A2001-08-03
JPH09177795A1997-07-11
Other References:
See also references of EP 1715203A4
None
Attorney, Agent or Firm:
Kawamiya, Osamu (IMP Building 3-7, Shiromi 1-chome, Chuo-k, Osaka-shi Osaka 01, JP)
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