Patent ID: 8866356

Claim:
A motor comprising: a motor section including a stator around which a coil is wound, and a rotor disposed within the stator for rotary-driving a rotating shaft; an amplifier section made integral with the motor section for supplying a driving power to the motor section; a wire connection base which comprises a first side and a second side opposing the first side and is configured to connect the motor section and the amplifier section electrically and mechanically with each other, on the first side and the second side, respectively; and a screw which is inserted, from the first side of the wire connection base into the motor section, to mechanically connect the wire connection base to the motor section, wherein a pitch diameter for a plurality of electrical connection parts disposed on the first side of the wire connection base and connecting the wire connection base with the motor section disposed on a circumference, whose center is at a shaft center of the rotating shaft, is set to be smaller than a pitch diameter for a plurality of electrical and mechanical connection parts disposed on the second side of the wire connection base and connecting the wire connection base with the amplifier section, the amplifier section includes a plurality of circuit substrates disposed in a layered form in a direction perpendicular to the rotating shaft, and the plurality of circuit substrates are electrically and mechanically screw-fastened to the plurality of electrical and mechanical connection parts of the wire connection base with the amplifier section via a conductive spacer.