Patent ID: 6592491
Filing Date: 2003-07-15
Classification: F16H

Abstract:
A toroidal type continuously variable transmission comprising:a casing; input and output discs supported within said casing coaxially with each other and capable of being rotated independently; an even number of pivot shafts disposed coaxially with or parallel with each other between said discs at twisted positions where said pivot shafts do not intersect with a central axis of said discs but extend toward directions perpendicular to said central axis; a plurality of trunnions rockable around said pivot shafts; displacement shafts protruded from inner surfaces of said trunnions; a plurality of power rollers rotatably supported around said displacement shafts and interposed between inner surfaces of said input and output discs; and support structure provided at sides of said power rollers and adapted to support said pivot shafts for rocking displacement and axial displacement; and wherein yokes forming a part of said support structure and having ends for supporting said pivot shafts provided on the ends of said plurality of trunnions are directly supported by and secured to an inner surface of said casing, and, said pivot shafts can be displaced axially, by splines, with respect to the ends of said yokes, and needle bearings for rockably supporting said pivot shafts are provided within the inside of said splines.