Transmission system for small-size vehicle

摘要

In a transmission system for a small-size vehicle in which a crankshaft (2) of an engine (E) and an input shaft (10) of a multi-stage transmission (M) are connected to each other through a fluid transmitting device (T), the fluid transmitting device (T) and a shifting clutch (Cc) being mounted on the crankshaft (2) and connected in series to each other. One of the fluid transmitting device (T) and the shifting clutch (Cc) is connected to the crankshaft (2), and the other is connected to the input shaft (10) of the multi-stage transmission (M) through a primary reducing device (14). Thus, when the multi-stage transmission (M) is to be shifted, the shifting operation of the multi-stage transmission (M) can be carried out lightly, irrespective of a creep phenomenon of the fluid transmitting device (T), by bringing the shifting clutch (Cc) into its OFF state. Moreover, the fluid transmitting device (T) and the shifting clutch (Cc) mounted on the crankshaft (2) rotate at a higher speed than that of the input shaft (10) of the transmission (M). Therefore, the torque capacities of the fluid transmitting device (T) and the shifting clutch (Cc) can be reduced correspondingly, leading to a reduction in size of the fluid transmitting device (T) and the shifting clutch (Cc). <IMAGE>