Starting apparatus for internal combustion engine

摘要

A starting apparatus includes a starting motor (2), and a gear train (4) that transmits rotation of the starting motor (2) to a crank shaft (3) of the engine. The gear train (4) includes a starter gear (5), a driven gear (6) that is meshed with the starter gear (5), an intermediate gear (7) that is provided coaxially with the driven gear (6), and a crank gear (8) that is meshed with the intermediate gear (7). In the starting apparatus, a tooth portion (14) made of resin is provided in the intermediate gear (7) from among the crank gear (8) and the intermediate gear (7) that are meshed with each other and are rotated together with the crank shaft (3) while the internal combustion engine is operated. Thus, noise that occurs in the gear train (4) is reduced.