| 摘要 |
A valve train system drive device of an engine has an idle gear 62 that transmits power from a crankshaft to valve train systems, an idle shaft 63 that rotatably supports the idle gear 62, and a clutch cover 39 that covers a crankcase 11 from a lateral side. A crankcase-side boss part 90 is formed on a sidewall 20b of the crankcase 11 and supports one end 63b of the idle shaft 63, and a case-cover-side boss part 91 is formed on the clutch cover 39 and supports the other end 63c of the idle shaft 63. A cover-side joint part 128 and a shaft-side joint part 111 I that engage with each other are formed at the case-cover-side boss part 91 and the other end 63c of the idle shaft 63, and engagement of the joint parts 128 and 111 prevents the idle shaft 63 from rotating. The present invention is to provide a valve train system drive device of an engine allowing size reduction, weight reduction, and simplification of the engine. |
