Thk Co., Ltd.

Aiko Tagawa

Takashi Naito

Masaki Nagatsuka

Hiroshi Kaneshige

Katsuya Fukushima

Koji Ozawa

Akie Tanaami

Miki Tobita

Munehiro Iwata

An air pump apparatus is provided which uses an electric actuator that can electrically operate a pneumatic device such as a suction pad or air chuck. The air pump apparatus includes an air cylinder having a built-in piston, and an electric actuator configured to move the piston linearly and relatively to the air cylinder, using the electric motor as a drive source. Air under negative pressure and/or positive pressure generated by the electric actuator causing the piston of the air cylinder to move linearly is used to operate a pneumatic device.

Air pump apparatus using electric actuator and air pump system

Provided is a linear motor capable of preventing an increase in length of the armature in the moving direction and also of reducing cogging. The linear motor has a magnetic field part having a plurality of permanent magnets arranged in a straight line in such a manner that N poles and S poles are formed alternately; and an armature having a core which has a plurality of teeth arranged opposite to the magnetic field part with a gap created therebetween and a plurality of coils wound on the teeth of the core. Among the teeth with the coils wound around, a width TWin a relative moving direction of each of teeth placed at both ends in the relative moving direction of the armature is smaller, from a base part to an end part thereof, than a width TWin the relative moving direction of each of other teeth.

Linear motor with reduced cogging

Growing community of inventors

Tokyo, Japan

Aiko Tagawa