Patent ID: 6413178
Filing Date: 2002-07-02
Classification: F16H

Abstract:
A driven pulley for use in a continuously variable transmission, the driven pulley being coaxially mountable around a main shaft and comprising:a first flange having a conical wall on one side thereof; a second flange coaxial with the first flange and having a conical wall which faces the conical wall of the first flange to form a belt-receiving groove in which a belt is to be partially wound, the second flange being at least axially movable with reference to the first flange; a first annular cam plate comprising at least two inclined first cam surfaces that are substantially identical and symmetrically-disposed thereon; a set of at least two first cam followers, each first cam follower being in engagement with a respective one of the first cam surfaces; a first radial support coaxial with the first and the second flange, the first support being axially movable and pivotable with reference to the first flange; a second annular cam plate comprising at least two inclined second cam surfaces that are substantially identical and symmetrically-disposed thereon, the second cam surfaces having an inverted inclination with reference to the first cam surfaces; a set of at least two second cam followers, each second cam follower being in engagement with a respective one of the second cam surfaces; a second radial support coaxial with the first and the second flange, the second support being rigidly connectable to the main shaft; a first spring set between the second flange and the first support; and a second spring set between the first support and the second support; wherein one among the first cam plate and the set of first cam followers is mounted on the second flange and the other is mounted on the first support, and wherein one among the second cam plate and the set of second cam followers is mounted on the first support and the other is mounted on the second radial support.