Hitachi Koki Co., Ltd.

Tadayoshi Mineta

Shinichi Sakamoto

Katsuhiro Oomori

Chikai Yoshimizu

Tomoyoshi Yokota

Kenichi Kato

Shinichi Hitachi Koki Co Ltd Sakamoto

Tomoyoshi Hitachi Koki Co Ltd Yokota

Katsuhiro Hitachi Koki Co Ltd Oomori

Chikai Hitachi Koki Co Ltd Yoshimizu

A commutator motor includes a stator and a rotor, and the stator includes a stator yoke and a field magnet. The field magnet is fixed onto the inner peripheral surface of the substantially cylindrical stator yoke. The stator yoke is configured by coaxially stacking a plurality of plate-like annular bodies, and the annular bodies are fixedly connected to each other by caulking at a caulking portion disposed on the annular body. In manufacture, the length of the stator yoke in the axial direction can be arbitrarily changed with the thickness of the annular body in the axial direction as a minimum unit. In case of manufacturing various stator yokes that are different in the axial length, the necessity of replacing a manufacturing machine is eliminated, thereby providing a commutator motor having the stator yoke which is low in the manufacturing costs.

Commutator motor

Growing community of inventors

Yamagata-ken, Japan

Tadayoshi Mineta