Title:
BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/065199
Kind Code:
A1
Abstract:
A bearing device (1) is provided with: two bearings (5a, 5b) that support a main shaft (4); an inner ring spacer (6i); an outer ring spacer (6g); a load sensor (143) that detects an axial load applied to the outer ring spacer (6g); a deformation amount sensor (144) that detects an axial deformation amount of the outer ring spacer (6g); an axial nut (8); pressing lids (10, 20); and a control device. The control device: obtains as an initial preload (F1) a load detected by the load sensor (143) in a state in which the axial nut (8) is fastened and the pressing lids (10, 20) are not fastened; calculates a reduction amount (F3) of the preload on the basis of the deformation amount detected by the deformation amount sensor (144) in a state in which the axial nut (8) is fastened and the pressing lids (10, 20) are fastened; and calculates as a post-assembly preload (F4) a load obtained by deducting the reduction amount (F3) of the preload from the initial preload (F1).
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Inventors:
HASHIZUME SHOHEI (JP)
UEDA KEIICHI (JP)
YAMAMOTO YOHEI (JP)
UEDA KEIICHI (JP)
YAMAMOTO YOHEI (JP)
Application Number:
PCT/JP2021/034139
Publication Date:
March 31, 2022
Filing Date:
September 16, 2021
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
B23Q17/00; B23B19/02; F16C19/16; F16C25/06; F16C35/063; F16C35/067; F16C35/12; F16C41/00; G01L5/00
Foreign References:
| JPH0615903U | 1994-03-01 | |||
| JP2020133889A | 2020-08-31 | |||
| JP2020003385A | 2020-01-09 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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