DEVICES FOR CONTROLLING THE RELATIVE AXIAL MOVEMENTS OF TWO COAXIAL ROTARY SHAFTS

摘要

A rod is arranged axially at the centre of a rotary hollow shaft. A drive motor actuates through gear wheels and chains the rotation of two threaded rods parallel to the shaft and fixed axially each coacting with a nut fast axially to the rod through a mechanism, roller stops, a ring and a cotter pin. The device is particularly useful for controlling the variations in orientation of the propeller blades of a boat.