| 摘要 |
A transmission structure of a power unit for a vehicle where a clutch mechanism provided between a crankshaft (12) a main shaft (62) is installed at the end of the main shaft (62) outside a crankcase (13) and both ends in an axial direction of a shift drum (67) for driving shift forks (64,65,66) for selectively establishing any of plural speeds are supported by the crankcase (13) so that the shift drum (67) can be turned, a separate sealed structure dedicated to the shift drum (67) is not required, the number of parts is reduced and the manhours of assembly can be reduced.
The shift drum (67) is arranged in the maximum outside diameter of the clutch mechanism (81) on a projection drawing showing a plane perpendicular to the axis of the main shaft (62), and is assembled in the crankcase (13) from the side of the clutch mechanism (81). |
