Patent ID: 6749530
Filing Date: 2004-06-15
Classification: F16H

Abstract:
A belt-drive continuously variable transmission, comprising:a drive pulley supported on an input shaft and including a first fixed pulley half and a first movable pulley half adapted to move closer to and apart from said first fixed pulley half; a driven pulley supported on an output shaft and including a second fixed pulley half and a second movable pulley half adapted to move closer to and apart from said second fixed pulley half; and a metal belt wound around said drive pulley and said driven pulley, wherein said first and second fixed pulley halves and said first and second movable pulley halves are disposed at diagonal positions, respectively, wherein hydraulic fluid chambers are formed in said first and second movable pulley halves, wherein a number of detection teeth for a rotation sensor are formed in radial directions on a back surface of an outer circumferential portion of at least one of said first and second fixed pulley halves, wherein said detection teeth for said rotation sensor are formed in an annular protruding portion protruded on the back surface of the outer circumferential portion of said at least one of said first and second fixed pulley halves, and wherein grooves associated with said detection teeth are each made to open in an outer circumferential surface of said annular protruding portion and terminate at a position in said annular protruding portion just before said grooves reach an inner circumferential surface of said annular protruding portion.