TRANSMISSION RATIO CHANGING MECHANISM AND VEHICLE STEERING DEVICE

摘要

A transmission ratio variable mechanism (5) includes an input member (20; 20B; 20D; 20E) and an output member (22; 22B; 22D; 22E) arranged to rotate around a first axis (A), an intermediate member (39) arranged to connect the input member (20; 20B; 20D; 20E) and the output member (22; 22B; 22D; 22E) so as to be differentially rotatable, and a motor (23) arranged to drive the intermediate member (39). The motor (23) includes a cylindrical rotor (231) arranged to rotate around the first axis (A). An inner periphery (230) of the rotor (231) is arranged to support the intermediate member (39) and arranged to rotatably support the input member (20; 20B; 20D; 20E) and the output member (22; 22B; 22D; 22E) via bearings (31, 33), respectively.