Cooling structure of power transmission apparatus

摘要

A cooling structure of power transmission apparatus (1) is provided. The power transmission apparatus has an electromagnetic clutch (10) including a fixed outer member (11) with an exciting coil (14) and a rotary inner member (12) adapted to be fixed to the outer member by controlling electric energy provided to the exciting coil, and a gear device (20) connected to the inner member of the electromagnetic clutch. A cooling apparatus (40) is positioned between the outer member (11) and a gear case member housing the gear device, for cooling both of the electromagnetic clutch (10) and the gear device (20) concurrently.