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:
Sep. 11, 2018
Filed:
Sep. 20, 2012
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Akihiko Morikawa, Chiyoda-ku, JP;
Kazuhisa Takashima, Chiyoda-ku, JP;
Toshihiro Matsunaga, Chiyoda-ku, JP;
Masayuki Miyaoka, Chiyoda-ku, JP;
Akihiro Yamamura, Chiyoda-ku, JP;
Hiroki Maeda, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Abstract
The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft<the diameter of the convex portion<the diameter of ridge-shaped convex portions of the shaft<the diameter of the concave portion.