Device for changing the relative rotational position of a shaft to the drive wheel

摘要

The system according to the invention for the relative rotating position change of a shaft with respect to a driving wheel has an adjusting device with two pressure spaces which act against one another and which can be acted upon by a pressure medium pump. In order to achieve a uniform controlled adjusting operation and a secure position fixing, the pressure space connected with the pressure medium pump is acted upon by pressure at the start of the adjusting movement before the opposite pressure space connected with the pressure medium tank is relieved.