Title:
DC MOTOR
Document Type and Number:
Japanese Patent JP2018057052
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a motor that has an elongated brush life by securing a sufficient brush length while reducing the axial length of the motor.SOLUTION: Provided is a DC motor in which an axial center position of an armature core does not coincide with that of a field magnet and which contains a brush device at an inner diameter side of the field magnet. The DC motor is provided with a tapered portion of which polarizability gradually decreases towards an axial end on an inter peripheral surface of the field magnet not opposing an outer peripheral surface of the armature core, or a step portion structured to form a gap between a yoke inner peripheral surface and an outer peripheral surface of the field magnet.SELECTED DRAWING: Figure 1
Inventors:
TANIGUCHI TSUKASA
SAITO KAZUHIRO
KAWATA YOSHIO
SAITO KAZUHIRO
KAWATA YOSHIO
Application Number:
JP2016186443A
Publication Date:
April 05, 2018
Filing Date:
September 26, 2016
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD
International Classes:
H02K23/04; H02K13/00
Domestic Patent References:
| JPS52153009U | 1977-11-19 | |||
| JP2015004272A | 2015-01-08 | |||
| JP2014103721A | 2014-06-05 | |||
| JP2001069738A | 2001-03-16 | |||
| JP2005223977A | 2005-08-18 |
Foreign References:
| EP2466726A1 | 2012-06-20 | |||
| KR101243303B1 | 2013-03-15 |
Attorney, Agent or Firm:
Yuji Toda
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