Title:
LOW-DUST GREASE COMPOSITION FOR HIGH-SPEED ROTATION, AND BEARING ENCLOSING SAME
Document Type and Number:
WIPO Patent Application WO/2021/085100
Kind Code:
A1
Abstract:
[Problem] To provide: a grease composition which has low low-temperature torque and low dust/long service life in an ultra-high-speed/high-temperature environment in which rotation speed exceeds 30,000 rpm; a rolling bearing in which low dust/long service life and low low-temperature torque can be realized by application of said grease composition; and a motor that comprises the bearing. [Solution] A grease composition containing a fluorine oil, an ester oil, and a polyalphaolefin oil as base oils, a fluorine-based thickener, a urea-based thickener, and a barium complex soap thickener as thickeners, the grease composition containing the above components in a specific ratio; a rolling bearing in which the grease composition is enclosed; and a motor that comprises the rolling bearing.
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Inventors:
ASAI YUSUKE (JP)
TAKATA SHINTARO (JP)
YAMAMOTO DAIKI (JP)
TAKATA SHINTARO (JP)
YAMAMOTO DAIKI (JP)
Application Number:
PCT/JP2020/038478
Publication Date:
May 06, 2021
Filing Date:
October 12, 2020
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
C10M169/02; F16C19/06; F16C33/66; F16C33/78; H02K5/173; C10M105/32; C10M107/02; C10M107/38; C10M115/06; C10M115/08; C10M117/02; C10N10/04; C10N30/00; C10N30/08; C10N40/02; C10N50/10
Domestic Patent References:
| WO2008105377A1 | 2008-09-04 | |||
| WO2018101432A1 | 2018-06-07 | |||
| WO2016158070A1 | 2016-10-06 |
Foreign References:
| JP2009209990A | 2009-09-17 | |||
| JP2013087193A | 2013-05-13 | |||
| CN101760284A | 2010-06-30 | |||
| JP4239514B2 | 2009-03-18 | |||
| JP4505954B2 | 2010-07-21 | |||
| JP2015224269A | 2015-12-14 | |||
| JP2007056939A | 2007-03-08 | |||
| JP2013087193A | 2013-05-13 |
Other References:
OTA HIROYUKI: "Development of an ultra-high speed spindle using grease-lubricated ceramic ball bearings", REPORT OF RESEARCHES AND DEVELOPMENTS ASSISTED IN FISCAL YEAR 2000, 31 December 2002 (2002-12-31), JP, pages 29 - 33, XP009536347
See also references of EP 4053252A4
See also references of EP 4053252A4
Attorney, Agent or Firm:
HANABUSA PATENT & TRADEMARK OFFICE (JP)
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