Patent ID: 6626778
Filing Date: 2003-09-30
Classification: F16H

Abstract:
A continuously variable transmission unit, comprising:two pulley sets which each including a pair of discs, each pair of discs enclosing a V-shaped groove; a support shaft; two screw mechanism, each screw mechanism being concentric with respect to the support shaft for moving the discs of the respective pulley set towards and from each other; and an endless flexible element stretching between the pulley sets and accommodating in the V-shaped groove thereof, wherein each screw mechanism being controllable by a control means and having two screw actuators with opposite screw thread angles, each screw actuator-engaging the respective discs and having a screw and a nut such that the screw and the nut of each screw mechanism are accommodated in a bore in the support shaft, and each screw actuator engaging the support shaft by means of a support bearing, accommodated in the bore of the support shaft.