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:
Aug. 18, 2015
Filed:
Aug. 26, 2010
Yuki Ichise, Tokyo, JP;
Takayuki Hagita, Tokyo, JP;
Masayuki Ishikawa, Tokyo, JP;
Takeshi Hirano, Tokyo, JP;
Takayuki Watanabe, Tokyo, JP;
Yuki Ichise, Tokyo, JP;
Takayuki Hagita, Tokyo, JP;
Masayuki Ishikawa, Tokyo, JP;
Takeshi Hirano, Tokyo, JP;
Takayuki Watanabe, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
A main-bearing outer diameter of an electric motor is made smaller than a rotor outer diameter without causing a drop in production efficiency, and the ease of performing a shrink-fitting step is also enhanced by making it possible to mount a rotor to a main shaft in an early stage. A bearing journal portion () of a main shaft () of an electric motor is formed in a shape into which an inner race () of a main bearing () can be press-fitted from both sides in the axial direction thereof, and, in addition, an outer diameter of the bearing journal portion () is made larger than an outer diameter of a rotor press-fitting portion (), whereas a bearing bore portion () of a partition member () is formed in a shape into which an outer race () can be press-fitted from both sides in the axial direction thereof. It is preferable that a space (S) into which a press-fitting tool for press-fitting the main bearing () can be inserted be provided between the rotor press-fitting portion () of the main shaft () and the bearing journal portion () thereof.