Title:
FLUID DYNAMIC BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/196599
Kind Code:
A1
Abstract:
A fluid dynamic bearing device comprising a shaft member, a bearing sleeve 18 into the inner circumference of which the shaft member is inserted, and a dynamic pressure groove 26 that, by means of the pressure of an oil film generated in a radial bearing gap between the outer circumferential surface of the shaft member and the inner circumferential surface 24 of the bearing sleeve 18, supports the shaft member in a noncontact member so as to be capable of relative rotation. The dynamic pressure groove 26 is configured from a plurality of polygonal bumps 27 arranged in a pattern on the inner circumferential surface 24 of the bearing sleeve 18, and a polygonal groove part 28 formed so as to surround the polygonal bumps 27.
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Inventors:
KATO DAICHI (JP)
Application Number:
PCT/JP2020/013255
Publication Date:
October 01, 2020
Filing Date:
March 25, 2020
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C17/02; F16C17/04; F16C33/74
Foreign References:
| JPS5072045A | 1975-06-14 | |||
| JPS5214160A | 1977-02-02 | |||
| JPS6396321U | 1988-06-22 | |||
| JPH0369813A | 1991-03-26 | |||
| JP2015017692A | 2015-01-29 | |||
| JP2008157330A | 2008-07-10 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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