Mitsuba Corporation

Ken Yamamoto

Keiji Kiuchi

Shinichi Hagiwara

Yusuke Fujita

Masaki Ishizeki

Shinji Shibuya

Shigeyuki Enkaku

Yoichi Shindo

Nobuyasu Sadakata

Tomoo Iijima

Ken Hirota

Tomio Kudo

Atsushi Takahashi

Takashi Sekiguchi

Yuzuru Masuyama

This electric motor includes: a brushless motor (); and a control device () that is coupled integrally to an end of a motor case () in an axial direction. The control device () includes: a bus bar unit main body () that has a base unit () with a plurality of bus bars wired thereinside and has a connector unit () provided integrally on the base unit () and led out to an outside of a housing (); a motor drive unit () that drives the brushless motor (); and a motor control unit () that controls the motor drive unit (). The motor drive unit () is attached to a first main surface () of the base unit () while the motor control unit () is attached to a second main surface () of the base unit ().

Electric motor and electric pump

In a rotary electric machine using a sintered oil-impregnated bearing, oil that oozes out from the sintered oil-impregnated bearing is prevented from attaching onto a brush. In a stay part providing a brush holder stay, there is formed a through hole into which the sintered oil-impregnated bearing is fitted. A pair of holder portions that each accommodate therein a brush are formed to diametrically face each other. A terminal-fixing portion is formed on one side of each holder portion. A prescribed gap exists between the one side position and the terminal-fixing portion. By closing the inner-radial end of the gap by an end wall, a first oil pool is formed. Thus, the first oil pool is structured as an oil pool on an oil path of any oozed oil flowing from the through hole toward the outer radial side of the holder portion to prevent the oil from entering the holder portion.

Brush holder stay of rotary electric machine

An installation structure allows easy installation of vibration-proofing members in an electric motor, which avoid resonance due to vibration of an engine, without increasing the number of components. A bottom wall of an installation hole for receiving the electric motor is spaced from a bottom wall of a yoke. Also, flexible tabs are formed on the bottom wall of the yoke. In this arrangement, the electric motor is installed in the installation hole in a manner such that the flexible tabs are pressed into contact with a step portion arranged on the bottom wall of the installation hole.

Electric motor installation structure

Growing community of inventors

Kiryu, Japan

Ken Yamamoto