Rod is divided within wall into variable length active section, fixed length passive section, and active section containing piezoactuator and strain resistant rod/tube

摘要

The rod has a tubular wall with force introduction elements (31,32) at both ends and a piezoactuator (20) between the elements that forces them apart depending on an electrical voltage. The rod is divided within its wall into an active section (15) of variable length and a fixed length passive section (16). The active section contains the piezoactuator and a strain resistant rod or tube.