Abstract: Provided is an electrostatic coating apparatus capable of insulating an electric motor electrically from a member, to which an electrostatic high voltage is applied, and reducing the size and weight of the electrostatic coating apparatus. This electrostatic coating apparatus comprises a rotary atomizing head, to which high voltage is electrostatically applied, an electrostatically grounded AC servomotor, and a spindle and a fixed insulating member for insulating the AC servomotor electrically from the rotary atomizing head and a speed-increasing device to be set at the same potential as that of the former. The spindle and the fixed insulating member have insulation distance enlarging portions and of the mode, in which the creepage insulation distances from the speed-increasing device to the AC servomotor are enlarged.

Abstract: Provided is an electrostatic coating apparatus capable of insulating an electric motor electrically from a member, to which an electrostatic high voltage is applied, and reducing the size and weight of the electrostatic coating apparatus. This electrostatic coating apparatus comprises a rotary atomizing head, to which high voltage is electrostatically applied, an electrostatically grounded AC servomotor, and a spindle and a fixed insulating member for insulating the AC servomotor electrically from the rotary atomizing head and a speed-increasing device to be set at the same potential as that of the former. The spindle and the fixed insulating member have insulation distance enlarging portions of the mode, in which the creepage insulation distances from the speed-increasing device to the AC servomotor are enlarged.

Abstract: In a linear movement/rotation mechanism, inside a tube-like housing, a ball screw/ball spline mechanism and a hollow planetary reduction gear are coaxially disposed, a drive shaft extends therethrough, and a ball screw nut, a ball spline nut, a hollow planetary reduction gear, and a driven pulley are disposed in that order along a center axis of the drive shaft. A rotational force inputted to the driven pulley is inputted to a hollow rotational shaft of the hollow planetary reduction gear, and a reduced rotation output is outputted from a rear stage internal gear. The reduced rotation output is transmitted to the ball spline nut that is connected and fixed to the rear stage internal gear. When the rotation of the ball screw nut is restricted, a feeding operation of the drive shaft is realized.