Hydraulic shock-absorber and vibration damper with an inner tube

摘要

A hydropneumatic shock-absorber and vibration damper comprising a cylinder (1) a damping piston (2) disposed for axial movement inside the cylinder (1) and dividing off two working chambers filled with a hydraulic damping medium and connected by a connection which includes at least one throttle, a piston rod (3) mechanically connected to the damping piston and guided outwardly from the cylinder (1) in sealing- tight manner, a compensating chamber (11) connected to one (9) of the working chambers (9, 10) for receiving a volume of damping medium displaced by the piston rod (3), and a pneumatic spring chamber (13) filled with a compressible medium and separated in sealing-tight manner from the compensating chamber (11) by a freely movable floating piston (12). The piston rod (3) is a hollow cylinder and the damping piston (2) is annular. An inner tube (6) extending with slight peripheral clearance through the annular damping piston (2) and into the hollow cylindrical piston rod (3) is disposed inside cylinder (1) and coaxial therewith. The piston (12) separating the compensating chamber (11) from the pneumatic spring chamber (13) is guided inside the inner tube (6).