Patent ID: 9188206
Filing Date: 2015-11-17
Classification: F16H,Y10T

Abstract:
1. A toroidal continuously variable transmission, comprising: a pair of disks having an axially one-side surface of which sectional shape is toroidal, respectively, the disks being supported rotatably and coaxially with each other in a state that the respective axially one-side surface opposes to each other; and a plurality of power rollers arranged along with a circumferential direction of the disks between the respective axially one-side surface, the respective power rollers having a peripheral surface being made contact with the axially one-side surface of each of the pair of disks, wherein a plurality of disk-side concave grooves are formed on the axially one-side surface of each of the pair of disks, wherein a plurality of power roller-side concave grooves are formed on the peripheral surface of the power roller, wherein regardless of a transmission ratio, at a rolling contact area between the disk and the power roller, the disk-side concave grooves and the power roller-side grooves are in a distortional relation, wherein one of either the plurality of disk-side concave grooves formed on the pair of disks or the plurality of power roller-side grooves formed on the plurality of power rollers are formed as concentric or spiral grooves about an axis of the corresponding disk or power roller on which the grooves are formed, and wherein the other of either the plurality of disk-side concave grooves formed on the pair of disks or the plurality of power roller-side grooves formed on the plurality of power rollers are formed so as to form angles with respect to the circumferential direction of the corresponding disk or power roller on which the grooves are formed, when viewed from a normal direction relative to the one-side surface in an axial direction of the corresponding disk or power roller on which the grooves are formed.