Transmission for internal combustion engine

摘要

To provide a transmission for an internal combustion engine that allows a fit length between a dog and a dog hole to be made longer and gear splines to be made longer, without having to make an axial length of the transmission longer. A transmission (87) selectively performs gearshifting by using a shift fork (98d) to slidingly move a shift gear (88d) of the transmission (87) axially and by using a dog clutch (DC6) to engage the shift gear (88d) with, or disengage the shift gear (88d) from, an adjacent gear (88f). When the shift gear (88d) slidingly moves, a gear-side spline portion (132) of the shift gear (88d) slidingly moves over a shaft-side spline portion (83b) .