Patent ID: 6117043
Filing Date: 2000-09-12
Classification: F16H

Abstract:
A single cavity continuously variable transmission, comprising:a casing, an input shaft, an input side disc rotatably supported on the input shaft, an output side disc disposed on the input shaft in opposed relationship with the input side disc, a pair of yokes provided substantially in parallel to each other adjacent to the input side disc and the output side disc with a rotation axis of the input side disc and the output side disc disposed therebetween, at least a pair of trunnions oscillating via pivot shafts present at twisted positions relative to the rotation axis of said two discs, said pivot shafts being formed on opposite end portions of said trunnions, and at least a pair of power rollers rotatably supported on displaceable shafts protruded from the inner sides of said trunnions, said power rollers being sandwiched between said input side disc and said output side disc,said yokes having restraining holes formed in intermediate portions thereof supported by a supporting portion secured to said casing or a member secured thereto, the pivot shafts of the trunnions being fitted to opposite end portions of said yokes,characterized in that said pair of yokes are fitted and supported on the supporting portion against movement along the rotation axis of said discs and movement along a rotation axis direction of said power rollers in a neutral state, but for oscillatory displacement in a plane perpendicular to a plane containing a center axis of the supporting portion and the rotation axis of said discs,and at least one of said yokes is fitted and supported on the supporting portion for movement in an axial direction of said pivot shafts.