Vorrichtung zur Erzeugung einer nach einem gewuenschten Bewegungsgesetz verlaufenden Foerderbewegung

摘要

Apparatus for producing a jerk-free intermittent conveying motion which proceeds in accordance with a desired law of motion includes an electric motor driving the input of a steplessly variable transmission the output of which drives a crank transmission through a wormgear. A toothed push rod connected to the crank of the crank transmission drives a pinion coupled to drive one of two sprocket wheels carrying an endless chain to which is attached a carriage to be reciprocated. A cam disposed on the shaft of the crank has a control surface which defines the desired law of motion and is followed by a roller carried by one arm of a lever pivoted intermediate its ends. The other arm of the lever is coupled to an adjusting element of the steplessly variable transmission so as to adjust the output speed of such transmission in dependence upon the crank position and in accordance with the desired law of motion.