Power switching device for vehicle

A power switching device for vehicle, the switching device comprising:

• at least first and second power switching mechanisms arranged on the way of a driving force transmission passage from a driving source to wheels;
• a shared operating mechanism to switch both of the first and second power switching mechanisms on and off;
• the shared operating mechanism having a waiting mechanism;
• and
• a housing accommodating the first and second power switching mechanisms and the shard operating mechanism, the housing being integrally formed with a boss portion having the waiting mechanism built-in, wherein:
• the waiting mechanism includes a drive cylindrical shaft located in an operation side, a driven cylindrical shaft located in an actuation side, and a coil spring connecting the driven cylindrical shaft with the drive cylindrical shaft so as to transmit an operating power,
• both of the drive and driven cylindrical shafts and the coil spring are arranged in a same cylindrical shaft axis,
• the drive cylindrical shaft is supported on an inner peripheral surface of the boss portion through a drive side needle roller bearing, and the driven cylindrical shaft is supported on the inner peripheral surface of the boss portion through a driven side needle roller bearing, and
• the coil spring is arranged inside the drive cylindrical shaft and the driven cylindrical shaft.