Variable flexible drive

摘要

The intention is to propose a variable flexible drive with two fixed pulleys and a double adjustable pulley (16) which is arranged between these and is supported in axially movable fashion on one side on a pivotable support (18) and no alignment errors of the tensile transmission element are to arise from an adjustment operation. As a solution, it is proposed to displace the support (18) axially relative to the adjustable pulley (16) as a function of the extent of the pivoting travel of the adjustable pulley (16), in particular by means of a cam coupling (38) with conical or curved cams (46). Flexible drives of this kind are used especially in agricultural machines, e.g. combine harvesters. <IMAGE>