Invention Grant
- Patent Title: Direct-current motor
- Patent Title (中): 直流电动机
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Application No.: US12516400Application Date: 2007-11-26
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Publication No.: US08044545B2Publication Date: 2011-10-25
- 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: JP2007-024140 20070202
- International Application: PCT/JP2007/072733 WO 20071126
- International Announcement: WO2008/096495 WO 20080814
- Main IPC: H02K5/16
- IPC: H02K5/16

Abstract:
To provide a DC motor in which the rattling and the axial deviation of a rotor are restrained without increasing the axial dimension of the motor.This DC motor comprises a stator (2) on which coils (4) are provided, a rotor (8) so disposed as to be opposed to the inner periphery of the stator (2) and having magnetic poles, a current-carrying part provided at one end of the rotor (8) and transferring the current fed from a power supply to the coils (4) of the stator (2), a sleeve bearing (6) holding the rotor (8), and a ball bearing (7) holding the rotor (8) and having a load-carrying capacity larger than that of the sleeve bearing (6). The outer ring of the ball bearing (7) is positioned by the stator (2), and the inner ring of the ball bearing (7) is positioned by the rotor (8).
Public/Granted literature
- US20100060094A1 DIRECT-CURRENT MOTOR Public/Granted day:2010-03-11
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