公开(公告)号：US20130120868A1

公开(公告)日：2013-05-16

申请号：US13739415

申请日：2013-01-11

Applicant: Nidec Corporation

Inventor： Junya MIZUKAMI ,  Takayuki OE ,  Yoichi SEKII ,  Naoki SABASHI ,  Takehito TAMAOKA ,  Takashi YAMAMOTO ,  Shigeki HORIKI ,  Kazushi MIURA ,  Mitsuhiro TAKEMOTO ,  Hironori ANDO ,  Katsuya TAKAHASHI

IPC: H02K7/08 ,  G11B15/00

CPC classification number: H02K7/08 ,  F16C17/107 ,  F16C33/745 ,  F16C2226/40 ,  F16C2370/12 ,  G11B15/00 ,  G11B19/2036 ,  G11B25/043 ,  H02K5/1675

Abstract: A motor includes a seal cap and a tubular portion. The seal cap includes a first seal cap lower surface which is an annular surface facing axially downward, and a second seal cap lower surface which is an annular surface facing axially downward and arranged radially outward of the first seal cap lower surface. The tubular portion includes a first tubular portion upper surface which is an annular surface arranged axially opposite to the first seal cap lower surface, and a second tubular portion upper surface which is an annular surface arranged radially outward of the first tubular portion upper surface and in contact with the second seal cap lower surface. The first tubular portion upper surface includes an oil-repellent film region covered with an oil-repellent film. A substantially annular radially extending gap is defined between the first tubular portion upper surface and the first seal cap lower surface.

Abstract translation: 马达包括密封盖和管状部分。 密封盖包括第一密封盖下表面，其是面向轴向向下的环形表面，以及第二密封帽下表面，第二密封帽下表面是面向轴向向下并且布置在第一密封盖下表面的径向外侧的环形表面。 管状部分包括第一管状部分上表面，该第一管状部分上表面是与第一密封帽下表面轴向相对布置的环形表面，以及第二管状部分上表面，其是设置在第一管状部分上表面的径向外侧的环形表面， 与第二密封盖下表面接触。 第一管状部分上表面包括被拒油膜覆盖的拒油膜区域。 在第一管状部分上表面和第一密封帽下表面之间限定基本环形的径向延伸的间隙。