Patent ID: 8245814
Filing Date: 2012-08-21
Classification: B62D,F16H,Y10T

Abstract:
1. A transmission ratio variable mechanism comprising: an input member arranged to rotate around a first axis; an output member arranged to rotate around the first axis; a first bearing ring having first and second end surfaces and arranged to connect the input member and the output member so as to be differentially rotatable; a second bearing ring arranged to support the first bearing ring via a rolling element so as to be rotatable; and an actuator arranged to drive the second bearing ring to rotate, wherein a second axis serving as a center axis of the first and second bearing rings is inclined to the first axis, each of the input member and the output member includes a power transmission surface opposed to the corresponding end surface of the first bearing ring, the transmission ratio variable mechanism further comprising uneven engagement sections arranged to engage each of the end surface of the first bearing ring and the power transmission surface corresponding to the end surface so as to be power-transmittable, wherein the uneven engagement sections include a projection provided on one of each of the end surfaces of the first bearing ring and the power transmission surface corresponding to the end surface and a recess provided on the other surface and arranged to engage with the projection, the first bearing ring includes a first member forming the first end surface and a second member forming the second end surface, and the first and second members are formed separately from each other and coupled to each other so as to be movable together.