Patent ID: 6997834

Claim:
A device for guiding a movable conical pulley disc ( 3 ) relative to a fixed conical pulley disc ( 2 ) along a variator shaft ( 1 ) of a continuously variable belt transmission, the movable conical pulley disc ( 3 ) being supported by the variator shaft ( 1 ) and being axially movable along the variator shaft ( 1 ) via first and second bearing surfaces ( 4 , 5 ) of the variator shaft ( 1 ), and at least one independent transfer element is provided between the movable conical pulley disc ( 3 ) and the variator shaft ( 1 ) to facilitate transfer of torque therebetween; wherein the variator shaft ( 1 ) has at least one axial guide groove ( 7 ) and the movable conical pulley ( 3 ) has at least one corresponding axial guide groove ( 8 ) and a single independent transfer element is located within each corresponding pair of guide grooves ( 7 , 8 ) for coupling the movable conical pulley ( 3 ) to the variator shaft ( 1 ), the single independent transfer element is an elongate cylindrical pin ( 6 )having a length extending over a range of motion of the movable conical pulley ( 3 ), and the movable conical pulley ( 3 ) is independently axially movable with respect to both the variator shaft ( 1 ) and each elongate cylindrical pin ( 6 ); first and second abutments ( 18 , 19 ) restrict axial movement of the at least one independent cylindrical pin ( 6 ) along the guide groove ( 7 ) of the variator shaft ( 1 ); and the first abutment ( 18 ) is formed by a step in the variator shaft ( 1 ) and the second abutment ( 19 ) is formed by an element separate from the variator shaft ( 1 ).