Crank drive for soil compacting apparatus

摘要

A crank device for soil compacting apparatus having a crank shaft and a connecting rod coupled to each other by two eccentric elements rotatable about parallel shafts in which the first eccentric element is provided with a plurality of recesses and the second element is provided with a locking bolt with the elements being rotatable to relative positions at which recesses respectively are generally aligned with said bolt, with the bolt being mounted for movement between a first position at which it can enter a first recess generally aligned therewith and cannot enter a second recess generally aligned therewith and a second position at which it cannot enter the first recess aligned therewith and can enter the second recess aligned therewith.