Invention Grant
- Patent Title: Rotor of electric motor having structure for attaching magnet securely to outer circumferential surface of rotor core and manufacturing method thereof
- Patent Title (中): 具有用于将磁体牢固地附接到转子芯的外周面的结构的电动机的转子及其制造方法
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Application No.: US13761343Application Date: 2013-02-07
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Publication No.: US08729760B2Publication Date: 2014-05-20
- Inventor: Kouji Kobayashi , Takeshi Tamaki
- Applicant: FANUC Corporation
- Applicant Address: JP Minamitsuru-gun, Yamanashi
- Assignee: FANUC Corporation
- Current Assignee: FANUC Corporation
- Current Assignee Address: JP Minamitsuru-gun, Yamanashi
- Agency: Drinker Biddle & Reath LLP
- Priority: JP2012-031604 20120216
- Main IPC: H02K1/27
- IPC: H02K1/27 ; H02K1/28 ; H02K21/14
Abstract:
In accordance with the present invention, a rotor of an electric motor including a rotor core, a plurality of magnets spaced apart from each other on an outer circumferential surface of the rotor core, and a cylindrical protective pipe surrounding the magnets is provided. The protective pipe has an inner diameter smaller than a diameter of a circumscribed circle passing through tops of outer surfaces of the magnets. A space defined by an inner surface of the protective pipe, the outer surfaces of the magnets and the outer surface of the rotor core is filled with resin, and the protective pipe is held so as to have a diameter larger than that of the circumscribed circle, due to injection pressure of the resin.
Public/Granted literature
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