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. 26, 2020
Filed:
Jul. 19, 2017
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Hiromitsu Okamoto, Hitachinaka, JP;
Shinji Yamazaki, Hitachinaka, JP;
Yuichiro Baba, Hitachinaka, JP;
Ryoji Kobayashi, Hitachinaka, JP;
Motoo Kitahara, Hitachinaka, JP;
Yuki Arai, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
An electric machine capable of easily and efficiently assembling a rotor core to a rotating shaft is provided. A rotor core is formed by laminating a first steel plate consisting of one or more electromagnetic steel plates having a first protrusion portion to be accommodated in a groove portion of a rotating shaft and a second steel plate consisting of one or more electromagnetic steel plates having a second protrusion portion to be accommodated in the groove portion of the rotating shaft. The first protrusion portion of the first steel plate has a first engaging portion deformed by a side surface of the groove portion of the rotating shaft. At least a part of the first engaging portion of the first steel plate is disposed in a space formed between a second protrusion portion of the second steel plate and the side surface of a groove portion of the rotating shaft.