Patent ID: 6174257
Filing Date: 2001-01-16
Classification: F16C,F16H

Abstract:
A toroidal continuously variable transmission, comprising an input shaft, an input side disc rotatable with the input shaft, an output side disc disposed coaxially with the input side disc and supported for rotation relative to the input side disc, a plurality of trunnions rockable about respective pivot axes transverse to a center axis of the input side and output side discs, a plurality of power rollers each rotatably supported on a corresponding displacement shaft supported by a corresponding one of said trunnions, and held between the input side and output side discs, and a respective thrust anti-friction bearing provided between an outer side of each power roller and an inner side of the corresponding trunnion and permitting rotation of that power roller while supporting a thrust load applied to that power roller, inner sides of the input side and output side discs which are opposed to each other being made into concave surfaces of an arcuate cross-sectional shape, a peripheral surface of each power roller being made into a spherical convex surface, each said peripheral surface and said inner sides being made to bear against each other, characterized in that each said thrust anti-friction bearing has an annular outer race rotatably supported on an intermediate portion of the corresponding displacement shaft by a bearing member disposed between said outer race and said intermediate portion of the corresponding displacement shaft.