Invention Grant
- Patent Title: Direct current motor
- Patent Title (中): 直流电机
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Application No.: US12514756Application Date: 2007-11-19
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Publication No.: US08093774B2Publication Date: 2012-01-10
- Inventor: Masayuki Yokoyama , Youichi Fujita , Sotsuo Miyoshi , Naohiro Oketani
- Applicant: Masayuki Yokoyama , Youichi Fujita , Sotsuo Miyoshi , Naohiro Oketani
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2006-326842 20061204
- International Application: PCT/JP2007/072393 WO 20071119
- International Announcement: WO2008/069016 WO 20080612
- Main IPC: H02K5/173
- IPC: H02K5/173 ; H02K7/08

Abstract:
A direct current motor includes: a stator (2) on which a plurality of coils (4) is provided; a rotor (8) including a plurality of permanent magnet magnetic poles (9) that is provided so as to face an inner periphery of the stator, and a pipe (11) on one end; a current-carrying portion (19) that is provided on the other end of the rotor (8) and commutates current supplied from a power source to the coils (4) on the stator (2); a sleeve bearing (6) that holds the rotor (8); and a ball bearing (7) that holds the rotor (8) and has a larger load-bearing capacity than that of the sleeve bearing (6). Furthermore, the pipe (11) holds the ball bearing (7) and is in direct contact with the ball bearing (7).
Public/Granted literature
- US20100026118A1 DIRECT CURRENT MOTOR Public/Granted day:2010-02-04
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