BEARING DEVICE, SPINDLE DEVICE, AND SPACER

WIPO Patent Application WO/2022/210720

A1

This bearing device comprises: at least one bearing which has a rolling element and a raceway surface, and which supports a shaft; a member which is disposed on a path where pressing force is transmitted that generates a preload between the rolling element and the raceway surface; a load sensor (50) which is fixed to the member, the load sensor having a resistance value which changes in accordance with the pressing force; and a resistance circuit (60) which connects to the load sensor to form a bridge circuit. The load sensor (50) includes a thin film pattern having a resistance which changes in accordance with the pressing force, and a protective layer which insulates and protects the thin film pattern. The resistance circuit (60) includes a plurality of resistors constituting the bridge circuit together with the load sensor. The foregoing provides a bearing device having little temperature drift and which can measure a preload of a bearing with a simple configuration.

WO/1996/030661	A PRE-LOADING DEVICE FOR A RADIAL-BEARING UNIT
JP6015715	A drive of a sealing machine style and a sealing machine style, a conveying machine, and a manufacture device
JP4772849	Rolling bearing

KOIKE TAKASHI (JP)
FUKUSHIMA YASUYUKI (JP)
SHIBUYA YUSUKE (JP)
KONDOU DAICHI (JP)

PCT/JP2022/015473

October 06, 2022

March 29, 2022

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NTN TOYO BEARING CO LTD (JP)

F16C19/54; F16C35/12; F16C41/00; G01L5/00

JP2020060411A	2020-04-16
JP2019215273A	2019-12-19
JPH07167720A	1995-07-04
JP2003530565A	2003-10-14
JP2021099282A	2021-07-01

FUKAMI PATENT OFFICE, P.C. (JP)

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