Title:
FLUID DYNAMIC BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/040164
Kind Code:
A1
Abstract:
The density of a sintered metal bearing sleeve is adjusted to 80 to 95% relative to the true density, and the Young's modulus of the bearing sleeve is adjusted to 70 GPa or more. By increasing the density of the bearing sleeve and adjusting the Young's modulus of the bearing sleeve to 70 GPa or more in this manner, the change in size of the inside surface of the bearing sleeve can be reduced to 0.5 μm or less when a 2-4 mm shaft member is supported.
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Inventors:
ITO FUYUKI (JP)
OKAMURA KAZUO (JP)
SATOJI FUMINORI (JP)
OKAMURA KAZUO (JP)
SATOJI FUMINORI (JP)
Application Number:
PCT/JP2010/064759
Publication Date:
April 07, 2011
Filing Date:
August 31, 2010
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
ITO FUYUKI (JP)
OKAMURA KAZUO (JP)
SATOJI FUMINORI (JP)
ITO FUYUKI (JP)
OKAMURA KAZUO (JP)
SATOJI FUMINORI (JP)
International Classes:
F16C17/02; F16C33/12; F16C33/14; F16C35/02
Foreign References:
| JP2006266429A | 2006-10-05 | |||
| JP2001132735A | 2001-05-18 | |||
| JPH07190047A | 1995-07-28 | |||
| JPH04119225A | 1992-04-20 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
Kunihiko Shiromura (JP)
Kunihiko Shiromura (JP)
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