Vorrichtung zur Umwandlung einer Drehbewegung in eine Axialbewegung

摘要

A device for converting a rotary motion into an axial motion comprises an outer tube (10) with internal contours (10a), an inner shaft (11) with head (11a) with external contours (11b), an inner chamber (R) formed between tube (10) and shaft (11), and several roller elements (12) arranged inside the inner chamber (R) around the head (11a). The roller elements are in active engagement via at least one contour with the inner contours (10a) of the tube (10) and the outer contours (11b) of the head (11a) whose position can be adjusted essentially by rotation relative to the roller elements. (12). The shaft (11) is enclosed in a tubular element (14) which is coaxial about the central axis (a-a) of the shaft (11). When the device is actuated, the tubular element (14) moves translationally relative to the tube (10). The device is thus protected in a very simple way from external influences.