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:
Oct. 08, 2019
Filed:
Mar. 09, 2017
Meidensha Corporation, Tokyo, JP;
Keisuke Matsuo, Tokyo, JP;
Takashi Okitsu, Tokyo, JP;
Mototsugu Omura, Tokyo, JP;
Morio Takada, Tokyo, JP;
Daiki Matsuhashi, Tokyo, JP;
MEIDENSHA CORPORATION, Tokyo, JP;
Abstract
The present invention comprises a permanent magnet () that is disposed around a rotor shaft (), a retaining ring () that is press-fitted around the outside of the permanent magnet () from one end of the rotor shaft () so as to retain the permanent magnet () against the rotor shaft (), and an end plate () that is provided adjacent to the permanent magnet () in the axial direction of the rotor shaft () and guides the press-fitted retaining ring (), maintaining planar contact with the inner circumferential surface thereof, toward the permanent magnet () while causing the retaining ring () to expand as the retaining ring () progresses from one end of the rotor shaft () to the other end of the rotor shaft (). Concentration of stress on the retaining ring () during press-fitting can thus be minimized.