Title:
BEARING DEVICE AND SPINDLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/210722
Kind Code:
A1
Abstract:
A bearing device (30) comprises: at least one bearing (5a) including an outer ring (5ga), an inner ring (5ia), and a rolling element (Ta); a first member (6g) disposed on a path (P1) through which is transmitted a pressing force generating pre-compression between the rolling element (Ta) and each raceway surface of the outer ring (5ga) and the inner ring (5ia); a load sensor (50) disposed on the first member (6g); a temperature detector (60) disposed on the outer ring (5ga) or the first member (6g); and a load computation processing unit (70) that estimates the pre-compression on the basis of an output from the load sensor (50) and a change amount in a load value on the load sensor (50) due to thermal expansion of the outer ring (5ga) and the first member (6g), the thermal expansion corresponding to the output of the temperature detector (60). Through this, a bearing device and a spindle device that can accurately detect pre-compression of a bearing are provided.
Inventors:
FUKUSHIMA YASUYUKI (JP)
KOIKE TAKASHI (JP)
SHIBUYA YUSUKE (JP)
KOIKE TAKASHI (JP)
SHIBUYA YUSUKE (JP)
Application Number:
PCT/JP2022/015481
Publication Date:
October 06, 2022
Filing Date:
March 29, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C25/08; F16C35/07; F16C35/12; F16C41/00
Domestic Patent References:
| WO2020004430A1 | 2020-01-02 |
Foreign References:
| JP2009036312A | 2009-02-19 | |||
| JP2009275736A | 2009-11-26 | |||
| JP2001254742A | 2001-09-21 | |||
| JP2009036313A | 2009-02-19 | |||
| JPH0211220U | 1990-01-24 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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