TRANSMISSION RATIO VARYING MECHANISM

摘要

A transmission ratio varying device is provided to improve a transmission characteristic between a steering angle of a steering handle and a full rudder angle of a steering wheel. A first gear(1201) and a second gear(1601) serve as spur gears. The direction of a rotor shaft(2002) of a motor(20) and an axial center(1600) of the second gear is provided in parallel to the direction of an axial center(100) of a carrier. The first gear and the second gear includes scissor gears to minimize the backlash of a first gear(1201) and a second gear including the spur gears. The motor is fixed to one axial-direction end portion of a housing(13). A carrier fixing unit(19) and a carrier rotation allowing unit are fixed to the housing. A carrier fixing unit is used to prevent the carrier from rotating.