Minebea Mitsumi Inc.

Shoma Yamanishi

Michihiro Shimizu

Hitoshi Iwata

Naoki Ohsawa

Toshiyuki Nishikata

Yuta Amagi

Seiji Mitamura

Tsuyoshi Kano

Yuya Senda

A rotating body is shorter in radial direction than in axial direction. The inner circumferential surfaces of a first bearing and a second bearing are fixed at an outer circumferential surface of the shaft member. In the axial direction, the outer diameter of the shaft member is substantially the same from a part, of the shaft member, opposing the first bearing to a part, of the shaft member, opposing the second bearing, and the inner and outer diameters of the rotating body are substantially the same from an end part, of the rotating body, on the first bearing side to an end part, of the rotating body, on the second bearing side. In the axial direction, one of stators is disposed at a central part (C) of the shaft member, one of magnets is disposed at a central part (C) of the rotating body.

Rotating device

Provided is a rotating device having excellent performance of cooling a heat generation source. Included are a shaft member, a rotating body having a tubular shape and rotatable about the shaft member, a bearing supporting the rotating body with respect to the shaft member, and a coupling member disposed between the bearing and the rotating body in a radial direction (cd). The coupling member includes a ventilation channel communicating with an inside and an outside of the rotating body.

Rotating machine

To provide a motor capable of meeting a demand for size reduction. The motor includes an axial member, a tubular rotating body rotatable in relation to the axial member, a bearing supporting the rotating body with respect to the axial member, and a stator inside the rotating body. The rotating body preferably includes a tubular member formed of a single member, and a magnet.

Motor with a stepped rotating body

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Nagano, Japan

Shoma Yamanishi