Patent ID: 7004882
Filing Date: 2006-02-28
Classification: F16H

Abstract:
1. A toroidal continuously variable transmission comprising: a casing; input and output disks respectively including inner surfaces, disposed concentrically with each other inside said casing, and supported in such a manner that they are rotated independently of each other; a plurality of trunnions each including even-numbered pivot shafts existing at twisted positions which are at right angles to a central-axis direction of said input and output disks and disposed concentrically with to in parallel to each other, and being swingable about said pivot shafts; a plurality of shift shafts respectively projected out from inner surfaces of said trunnions; a plurality of power rollers held by and between respective facing inner surfaces of said input and output disks in such a manner that they are rotatably supported on said shift shafts; and a support member fixed directly to said casing and supporting said pivot shafts of said trunnions in such a manner that they are shifted in an axial direction thereof and in an inclined rotation direction thereof; a plurality of needle roller bearings for supporting said pivot shafts of said trunnions on said support member; and a plurality of spherical-surface bearings for supporting said needle roller bearings; wherein said spherical-surface bearings each includes spherical-surface-shaped inner and outer races, and wherein said axial-direction shifting movement of said trunnion is carried out between said pivot shaft and said needle roller bearing by a sliding movement of said trunnion.