| 摘要 |
<p>A transmission ratio variable mechanism (5) includes an input member (20) and an output member (22), which are rotatable around a first axis (A), an inner ring (391) arranged to connect the input and output members (20, 22) to each other so as to be differentially rotatable, an outer ring (392), and a motor (23) for the transmission ratio variable mechanism, the motor (23) arranged to drive the outer ring (392) to rotate. A second axis (B) serving as a center axis of the inner ring (391) and the outer ring (392) is inclined to the first axis (A). The transmission ratio variable mechanism (5) includes uneven engagement sections (64, 67) including a projection (65, 68) provided on one of each of end surfaces (71, 73) of the inner ring (391) and a power transmission surface (70, 72) corresponding to the end surface (71, 73), and a recess (66, 69) provided on the other surface and arranged to engage with the projection (65, 68). The inner ring (391) includes a first member (151; 151A) forming the first end surface (71) and a second member (152; 152A) forming the second end surface (73). The first and second members (151, 152; 151A, 152A) are formed separately from each other and coupled to each other so as to be movable together.</p> |
