Patent ID: 8083637

Claim:
A toroidal continuously variable transmission comprising: at least a pair of discs that are relatively rotatably supported and coaxially arranged so that axially side surfaces thereof oppose each other; a plurality of trunnions that are disposed at a plurality of positions between the axially side surfaces of the discs along circumference of the discs; and a plurality of power rollers, each of which is rotatably supported by a thrust rolling bearing on an inner surface of the trunnion, and has a spherical convex surface contacting with the axially side surface of the disc, wherein the trunnion comprises: a pair of tilt rotary shafts that are eccentrically arranged at both ends thereof so as to be deviated from a central axis of the disc, the trunnion being swingable about the tilt rotary shaft; and a supporting beam which is formed between the tilt rotary shafts, and comprises a cylindrical convex surface, of which central axis is parallel with the central axes of the tilt rotary shafts and positioned radially outside of the central axes of the tilt rotary shafts, and is formed on at least an inner surface thereof in radial direction of the discs, the thrust rolling bearing disposed between the support beam and an outer surface of the power roller comprises: an outer ring which is provided on a support beam side and comprises a partially cylindrical recess on an outer side thereof; and a plurality of rolling elements rollably disposed between an outer ring raceway formed on an inner surface of the outer ring and an inner ring raceway formed on the outer surface of the power roller, and the outer ring is supported on the trunnion so as to be swingable about the support beam in an axial direction of the disc by engaging the partially cylindrical recess of the outer ring with the cylindrical convex surface of the support beam.