Patent ID: 6527666
Filing Date: 2003-03-04
Classification: F16H

Abstract:
A toroidal continuously variable transmission, comprising:a rotational input shaft; an input disk arranged coaxially with said rotational input shaft and is driven thereby; an output disk which is arranged coaxially with said rotational input shaft and opposes said input disk; a pair of trunnions arranged in opposite positions on both sides of said rotational input shaft, each of said trunnions having an axial direction and comprising rotation shafts formed at both end portions of said trunnions, and offset portions, which are offset by a predetermined amount from said rotation shafts, between said rotation shafts of said trunnions wherein each trunnion is movable along and around the axial direction of the trunnion; an actuator which drives each of said pair of trunnions in the mutually opposite axial direction of the trunnions; power rollers which are supported by said trunnions and are gripped between said input disk and said output disk; links each of which is respectively formed with aperture portions into which said respective rotation shafts of said trunnions are inserted; and spherical joints provided between the outer peripheries of said rotation shafts and said aperture portions, wherein said trunnions are formed by forging, and shoulder portions of said trunnions which oppose said links and step portions which define outer ends of said shoulder portions are formed by cutting to keep a respective radii of the shoulder portions constant, and said links having projections which contact slidably into said shoulder portions according to swinging movement of said links.