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Title:
PRELOAD-DETECTABLE SCREW DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/213329
Kind Code:
A1
Abstract:
Provided is a preload-detectable screw device which can detect a preload with high accuracy and reduce the effect of heat generation on an output of a sensor. A screw device (1) includes: a screw shaft (2); a nut member (3); a plurality of rolling elements (7, 8); at least one axial strain sensor (24) (B, D) mounted on a surface of the nut member (3) and detecting axial strain of the nut member (3); and at least one circumferential strain sensor (24) (A, C) mounted on the surface of the nut member (3) and detecting circumferential strain of the nut member (3). A preload on the screw device (1) is detected on the basis of outputs of the axial strain sensor (24) (B, D) and the circumferential strain sensor (24) (A, C).

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Inventors:
KUBOTA YUJI (JP)
MORIYUKI YOSHINOBU (JP)
Application Number:
PCT/JP2020/011595
Publication Date:
October 22, 2020
Filing Date:
March 17, 2020
Export Citation:
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Assignee:
THK CO LTD (JP)
International Classes:
F16H25/22; F16H25/24
Foreign References:
JPH02221747A1990-09-04
JPH05141498A1993-06-08
CN206592507U2017-10-27
JP2014168373A2014-09-11
JP2008175383A2008-07-31
Attorney, Agent or Firm:
SHIOJIMA, Toshiyuki (JP)
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