Patent ID: 6328669
Filing Date: 2001-12-11
Classification: F16H

Abstract:
A toroidal type continuously variable transmission, comprising:at least one pair of disks, each one surface in the axial direction of which has a concave surface being areuate in cross section, said disks concentrically disposed on each other and rotatably supported independent from each other in a state that said concave surfaces are opposed to each other;a trunnion swingable about a pivot shaft situated at a torsional relation with respect to a center axis of said pair of disks, said trunnion having a circular hole formed in a direction perpendicular to the axial direction of the pivot shaft at a middle portion thereof;a displacement shaft including a support shaft portion and a pivot shaft portion that are parallel and eccentric to each other, said support shaft portion rotatably supported to the inner surface of said circular hole through a radial bearing, said pivot shaft portion being protruded from an inner surface of the middle portion of said trunnion;a power roller having an areuate convex surface on the peripheral surface thereof, said power roller nipped between said concave surfaces of said pair of disks while being rotatably supported on an outer circumferential surface of said pivot shaft portion; anda thrust bearings located between said power roller and the inner surface of the middle portion of said trunnions,wherein an eccentric quantity of said displacement shaft being a distance between said support shaft portion and said pivot shaft portion is within a range from 5 mm to 15 mm.