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Patent Searching and Data


Title:
ELECTRIC MOTOR
Document Type and Number:
Japanese Patent JP2010028901
Kind Code:
A
Abstract:

To provide an electric motor that reliably prevents the entry of water into a bearing portion, and to enhance drainage and improve noise reduction capability and durability.

The electric motor includes: a stator S having a coil 13 and a rotor R having a closed-end cylindrical rotor yoke 60 covering the stator S from its front surface. The rotor R is provided at its central part with a rotating shaft 6 and this rotating shaft 6 is rotatably supported at the central part of a stator base 4 through a first bearing 29 and a second bearing 30. The stator base 4 is provided at its front face with an insulator ring 19 positioned outside the rotating shaft 6 and inside a tooth 13. The outer ring 83 of a water shield ring 80 obliquely extended outward from the bottom wall 63 of the rotor yoke 60 is provided in proximity to the inner surface of the peripheral wall of the insulator ring 19. A labyrinth 98 is provided between the insulator ring 19 and the outer ring 83. Either the insulator ring 19 or the outer ring 83 is cut and removed under the labyrinth 98.


Inventors:
OSAWA YUTAKA
KAWAMURA MIKIO
NEGISHI SATORU
NISHIYAMA TAKAYUKI
HIROSE MASAAKI
IMAZEKI MITSUHARU
Application Number:
JP2008183925A
Publication Date:
February 04, 2010
Filing Date:
July 15, 2008
Export Citation:
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Assignee:
MITSUBA CORP
HONDA MOTOR CO LTD
International Classes:
H02K5/10; H02K21/22
Attorney, Agent or Firm:
志賀 正武
高橋 詔男
渡邊 隆
鈴木 三義
西 和哉
村山 靖彦