Patent ID: 8215469

Claim:
A multiple disk clutch comprising: a clutch outer to which a rotational driving force is configured to be transmitted from a crankshaft; a clutch inner provided inside said clutch outer and configured to transmit the rotational driving force to a transmission shaft; frictional disks provided between said clutch outer and said clutch inner which is configured to receive the rotational driving force from said clutch outer through said frictional disks, said frictional disks being movable in an axial direction of the transmission shaft to thereby make and break transmission of the rotational driving force from said clutch outer to said clutch inner; a cam mechanism provided inside said clutch outer and configured to apply a pressing force to said frictional disks according to the rotational driving force from said crankshaft, said cam mechanism being configured to relax the pressing force applied to said frictional disks when a load from said transmission shaft exceeds a predetermined value; and a vibration isolating member provided at said clutch inner, wherein said first clutch inner is provided with a plurality of lightening holes that extend axially, entirely through said first clutch inner, and wherein the vibration isolating member is provided at an inner periphery of at least one of said lightening holes.