Title:
DC MOTOR
Document Type and Number:
Japanese Patent JP2020171091
Kind Code:
A
Abstract:
To provide a DC motor capable of suppressing wear of a commutator.SOLUTION: A DC motor 40 includes a commutator 20 formed of copper or a copper alloy of 99% or more of copper and a brush 30 to be in contact with the commutator 20 while being pressed against the commutator 20. The brush 30 is composed of a sintered body containing graphite and copper powder. In at least one of the commutator 20 and the brush 30, copper or a copper alloy and a hard compound 33 having hardness higher than that of graphite and copper powder are contained, which is scattered on or near a contact surface 20A with the brush 30 of the commutator 20 at least in use.SELECTED DRAWING: Figure 5
Inventors:
HIRABAYASHI TAKASHI
Application Number:
JP2019070200A
Publication Date:
October 15, 2020
Filing Date:
April 01, 2019
Export Citation:
Assignee:
DENSO CORP
International Classes:
H02K13/00; H01R39/04
Domestic Patent References:
| JPH0438152A | 1992-02-07 | |||
| JP2003527810A | 2003-09-16 | |||
| JPH02114835A | 1990-04-26 | |||
| JP2007082367A | 2007-03-29 | |||
| JPS62118732A | 1987-05-30 | |||
| JPH01298666A | 1989-12-01 | |||
| JP2006280164A | 2006-10-12 | |||
| JPH077892A | 1995-01-10 | |||
| JP2007060861A | 2007-03-08 |
Attorney, Agent or Firm:
Tsuyoshi Yamada
Kyoko Hino
Hiroshi Matsuda
Yusuke Kita
Kyoko Hino
Hiroshi Matsuda
Yusuke Kita