Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Aisin Corporation

Yutaka Ueno

Yusuke Yamamoto

Nobuhiro Asano

Takashi Imakawa

Kenji Fukuzaki

Masahiro Horiuchi

Takuya Hashimoto

A rotor core includes a shaft hole, into which a shaft is inserted, and keys, which are protrusions corresponding to keyways of the shaft. A radial distance, which is the distance from the center of the shaft hole to an inner wall varies depending on the position in the circumferential direction of the shaft hole. The shaft hole includes key regions and increased diameter regions, in each of which the radial distance is longer than the radius of the shaft. Keys are respectively arranged in the key region. The shaft hole also includes contact regions, in which the shaft and the inner wall come into contact with each other when the shaft is inserted into the shaft hole. The contact regions are each located between the key regions or between the increased diameter regions. The contact regions are arranged at equal intervals in the circumferential direction.

Rotor core

Growing community of inventors

Nisshin, Japan

Yutaka Ueno