To miniaturize a multifunctioned fluid machine by downsizing a switching means switching a drive shaft and the rotating shaft of a compressor section to connected/disconnected states.
The drive shaft 40 of a motor generator 43 and the rotating shaft 47 of the compressor section 52 are separated from each other, and a projection 77 is formed on the inner periphery of a cylindrical member 76 fitted around the drive shaft 40 and rotating shaft 47. A recess 74 is formed in the outer periphery of the front end 401 of the drive shaft 40, and a recess 75 is formed in the outer peripheral surface of the rear end 471 of the rotating shaft 47. A cylindrical member 76 composed of a magnetic body is arranged in a connection position with the projection 77 fitted into the recess 75 by power distribution to a solenoid coil 80. With power distribution to the solenoid coil 80 stopped, the cylindrical member 76 is arranged in a disconnected position with the projection 77 separated from the recess 75 by the spring force of a return spring 79.
MORI HIDEFUMI
IGUCHI MASAO
Makoto Onda