Tensioning device for an endless belt used for transporting workpieces comprises a base body, a piston and a piston rod having a locking unit which can be switched by pressurized fluid

摘要

Tensioning device comprises a base body (02), a piston (08) and a piston rod (11, 14) having a locking unit which can be switched by pressurized fluid. Preferred Features: The base body has chambers (28) which are impinged with the pressurized fluid to switch the locking unit of the piston rod. Each chamber contains a sliding piston of pressure piece. Each chamber is delimited by a membrane which is pressed against the piston rod when impinged with pressurized fluid.