Cone pulley drive

摘要

The invention relates to a cone pulley drive with a continuously variable transmission ratio which, to provide the axial forces for pressing the cone pulleys onto a tensile transmission element running between them, has hydraulic clamping means which are arranged on the shafts of the drive, can be displaced axially towards in each case one of the cone pulleys displaceable for this purpose on the respective shaft of the drive and can be supplied with pressure medium via a control valve, there being arranged, ahead of the drive, on its input shaft, a rotational speed sensor which passes the pressure medium to a pressure cylinder as a function of the rotational speed, the pressure cylinder being connected for the purpose of adjustment to a lever mechanism arranged ahead of the control valve. The pressure maintained by the rotational speed sensor also serves to vary the setting, as a function of the rotational speed, of a valve that limits the speed of adjustment of the cone pulley drive.