Pulley Assembly for a Continuously Variable Transmission

Driven pulley assembly for a continuously-variable vehicle transmission, comprising a support element having an axis, a first half-pulley rotationally connected to said support element, a second half-pulley facing said first half-pulley to define a seating adapted to house a drive belt, said second half-pulley being axially and circumferentially mobile in relation to said support element, cam means functionally inserted between said second half-pulley and said support element to control the position of said second half-pulley, said cam means defining a plurality of circumferential cavities carried by a peripheral portion of said second half-pulley and respectively defined by first and second sides disposed crosswise to said axis, and comprising a plurality of cam-followers each of which is connected to said support element and housed in a corresponding circumferential cavity characterised in that each of said cam followers cooperates selectively with said first and second sides, said first and second side defining a respective contact surface for the relative cam-follower and converging towards said first half pulley.