Patent ID: 9556931
Date: 2017-01-31
CPC Classifications: F16G,F16H

Claim:
1. An element for a metallic belt used in a belt-type continuously variable transmission, the belt-type continuously variable transmission including: a drive pulley and a driven pulley each of which has a pulley groove defined by a fixed pulley half and a movable pulley half; and a belt including an element and wound around the pulley groove of each of the drive pulley and the driven pulley, a constant-angle inclined generatrix portion in which a generatrix is inclined at a constant angle to widen the pulley groove radially outward being formed on a radial inner side of a surface of contact, with the element, of at least the fixed pulley half out of the fixed pulley half and the movable pulley half, a curved generatrix portion in which the generatrix is curved to gradually increase an inclination angle while widening the pulley groove radially outward being formed on a radial outer side of the surface of contact, the belt-type continuously variable transmission changing a gear ratio by: moving the movable pulley half of one pulley out of the drive pulley and the driven pulley away from the fixed pulley half of the one pulley to increase a width of the pulley groove of the one pulley; and moving the movable pulley half of the other pulley out of the drive pulley and the driven pulley closer to the fixed pulley half of the other pulley to decrease a width of the pulley groove of the other pulley, and a locking edge portion that contacts an adjacent element is formed in the element; a belt radial outer portion of a side edge of the element is linearly shaped to come into line contact with the constant-angle inclined generatrix portion of any of the drive pulley and the driven pulley; a projecting portion located below the locking edge portion and extending inward in a belt radial direction is provided at each of lower ends of both side edges of the element; and when the element and the curved generatrix portion on the radial outer side of any of the drive pulley and the driven pulley contact each other, the projecting portion bends inward in an axial direction of the pulley.