Title:
DYNAMIC PRESSURE BEARING, FLUID DYNAMIC PRESSURE BEARING DEVICE, AND MOTOR
Document Type and Number:
WIPO Patent Application WO/2022/064985
Kind Code:
A1
Abstract:
This dynamic bearing (bearing sleeve 8) comprises a first dynamic pressure generation part 11 and a second dynamic pressure generation part 12 which are provided on an inner peripheral surface 8a to be spaced apart in an axial direction. The dynamic pressure generation parts 11, 12 respectively have a plurality of dynamic pressure grooves 11a, 11b, 12a, 12b which are arranged in herringbone shapes and have different inclination directions. The first dynamic pressure generation part 11 has annular hill sections 11c between the axial directions of the plurality of dynamic pressure grooves 11a, 11b having different inclination directions. The plurality of dynamic pressure grooves 12a, 12b having different inclination directions in the second dynamic pressure generation part 12 are continuous in the axial direction.
Inventors:
YAMAGOU MASASHI (JP)
Application Number:
PCT/JP2021/032148
Publication Date:
March 31, 2022
Filing Date:
September 01, 2021
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C17/10; F16C33/10; H02K7/08; H02K7/14
Foreign References:
| JP2007333004A | 2007-12-27 | |||
| JP2002349548A | 2002-12-04 | |||
| JPH08335366A | 1996-12-17 | |||
| JP2016050648A | 2016-04-11 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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