Mitsuba Electric Manufacturing Co., Ltd.

Mitsuba Electric Mfg. Co., Ltd.

Takayoshi Sakamoto

Masashi Fukui

Hirohiko Maekawa

Atsushi Shimura

Yasuaki Nakazawa

Yutaka Hoshino

Method of fusing commutator risers to armature coil in electric motor

A fixing structure of the present invention is capable of fixing permanent magnets to an internal peripheral surface of a cylindrical yoke in a short time without producing a positional deviation. The fixing structure has magnet receiving pieces which are projected on the internal peripheral surface of an internal cylinder, and magnet holders each having elastically deformable magnet pressure pieces formed therein, so that permanent magnets are respectively held between the elastically deformed magnet pressure pieces and the magnet receiving pieces and pressed against the side of the magnet receiving pieces in a normal direction due to the elastic restoring force on the magnet pressure pieces. The permanent magnets can thus be integrally fixed to the internal peripheral surface of the internal cylinder.

Structure for fixing permanent magnets in motor

A casing of a motor is rendered light and also capable of forming a magnetic circuit in cooperation with a permanent magnet. The casing consists of an outer cylinder and an end bracket each being made of aluminum. An inner cylinder, made of iron and carrying a permanent magnet fixed to the inner peripheral surface thereof, is integrally fitted on the inner peripheral surface of a cylindrical portion of the outer cylinder which is sealed by the end bracket.

Casing structure for motor

Growing community of inventors

Tatebayashi, Japan

Takayoshi Sakamoto