The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2025
Filed:
Jul. 01, 2021
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisin Corporation, Kariya, JP;
Denso Corporation, Kariya, JP;
Takashi Imakawa, Okazaki, JP;
Yutaka Ueno, Nisshin, JP;
Masahiro Horiuchi, Toyota, JP;
Takuya Hashimoto, Ohbu, JP;
Kenji Fukuzaki, Toyota, JP;
Yusuke Yamamoto, Kariya, JP;
Nobuhiro Asano, Kariya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
AISIN CORPORATION, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
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.