Title:
BEARING DEVICE
Document Type and Number:
Japanese Patent JP2022053084
Kind Code:
A
Abstract:
To accurately detect a post-assembling preload of a bearing device.SOLUTION: A bearing device (1) comprises two bearings (5a, 5b) for supporting a spindle (4), an inner ring spacer (6i), an outer ring spacer (6g), a load sensor (143) for detecting a load in an axial direction applied on the outer ring spacer (6g), a deformation amount sensor (144) for detecting a deformation amount in the axial direction of the outer ring spacer (6g), a shaft nut (8), press lids (10, 20) and a control device. The control device acquires the load detected by the load sensor (143) as an initial preload F1 in a state that the shaft nut (8) is fastened, and the press lids (10, 20) are not fastened, calculates a reduction amount F3 of the preload on the basis of a deformation amount detected by the deformation amount sensor (144) in a state that the shaft nut (8) is fastened, and the press lids (10, 20) are fastened, and calculates a load which is obtained by subtracting the reduction amount F3 of the preload from the initial preload F1 as a post-assembling preload F4.SELECTED DRAWING: Figure 1
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Inventors:
HASHIZUME SHOHEI
UEDA KEIICHI
YAMAMOTO YOHEI
UEDA KEIICHI
YAMAMOTO YOHEI
Application Number:
JP2020159693A
Publication Date:
April 05, 2022
Filing Date:
September 24, 2020
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16C41/00; B23B19/02; B23Q17/00; F16C19/16; F16C25/08; F16C35/07; F16C35/12; G01L5/00
Attorney, Agent or Firm:
Fukami patent office