Patent ID: 7648010

Claim:
A starting clutch is provided coaxially with a crankshaft and is capable of transmitting a motive power of the crankshaft to a transmission device via a gear comprising: a disk-shaped drive plate of a clutch inner secured to and supported by a drive plate boss which is fitted to the crankshaft near an end thereof; a one-way clutch is fitted to an outer periphery of a cylindrical portion extending inwardly, which corresponds to a center side of the crankshaft of the drive plate boss; and a clutch outer forming a cup shape by an annular portion which covers an outer periphery of the drive plate and a hollow disk portion which covers an inner surface is rotatably supported by the crankshaft; wherein the one-way clutch is clamped by an inner peripheral edge of the hollow disk portion of the clutch outer from an outer peripheral side in cooperation with a cylindrical portion of the drive plate boss, and wherein an inner peripheral edge of the hollow disk portion of the clutch outer abuts against a flange portion of the drive plate boss extending along an inner surface of the drive plate in a centrifugal direction thereof.