Jtekt Corporation

Tadashi Fukao

Hirochika Ueyama

Nobutsuna Motohashi

Manabu Taniguchi

Yasutaka Miyagawa

Kenji Ooiso

Kanichi Koda

A rolling bearing includes rolling elements, an inner ring which includes a raceway surface on which the rolling elements roll on an outer circumference thereof, and an outer ring which includes a raceway surface on which the rolling elements roll and which receives a radial load and a load directed to one side of an axial direction from the rolling elements on an inner circumference thereof. A closure member for closing an inner circumferential side opening of the outer ring is formed integrally at an end portion of the outer ring which lies on the one side of the axial direction or the outer ring is fitted in a cylindrical portion of the closure member.

Rolling bearing and rolling bearing apparatus

A first spacer, a second tubular member, and a second spacer are externally fitted and fixed to an outer peripheral surface of a nut. The second tubular member is formed by stacking a plurality of silicon steel plates without any gap, and is arranged between the first spacer and the second spacer axially. The outer diameter of an outer peripheral surface of the second tubular member is made larger than the outer diameter of an outer peripheral surface of the first spacer and the outer diameter of an outer peripheral surface of the second spacer. A detection surface of a first displacement detector is made to radially face a contact portion between the second spacer and the second tubular member, while a detection surface of a second displacement detector is made to radially face a contact portion between the first spacer and the second tubular member.

Rolling bearing device with sensor

A rolling bearing device with a sensor includes a rotational component estimator that extracts a rotational synchronization component included in the rotation of an inner shaft relative to an outer ring from each of a signal output by a first displacement detector and a signal output by a second displacement detector. The rotational component estimator performs rotational operation and integration operation.

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Kashiba, Japan

Tadashi Fukao