GEAR-SHIFTING MECHANISM DRIVING DEVICE

摘要

To provide a gear-shifting mechanism driving device which allows a speedy and accurate gear-shifting operation and has a light weight even in the case where a shift spindle is short. A gear-shifting mechanism driving device includes a transmission for selectively establishing a gear combination by the turning of a shift spindle 60 for turning a master arm 71, and an actuator 51 as a power source for turning the shift spindle 60, in which the gear-shifting mechanism driving device includes a reduction gear shaft 54 provided in a power transmission path between the actuator 51 and the shift spindle 60, a first gear 53 provided on one end side of the reduction gear shaft 54 to receive power from the actuator 51 side, and a second gear 55 provided on another end side of the reduction gear shaft 54 to transmit power to the shift spindle 60 side. The reduction gear shaft 54 is made of a torsion bar.