Hydro-pneumatic shock absorber and vibration damper with inner tube

摘要

Hydro-pneumatic shock absorber and vibration damper comprising a cylinder (1), a damping piston (2), arranged axially movable inside the cylinder (1) and dividing two working chambers (9, 10) filled with a hydraulic damping medium and connected by way of at least one restriction, a piston rod (3), mechanically connected to the damping piston (2) and duly sealed led outside out of the cylinder (1), and an equalising chamber (11) connected to one of the working chambers (9, 10) for receiving a volume of the damping medium displaced by the piston rod (3), and a pneumatic spring chamber (13) filled with a compressible medium and tightly separated from the equalising chamber (11) by means of a freely movable, floating separating piston (12). The piston rod (3) is of hollow cylindrical design and the damping piston (2) of annular design. An inner tube (6) extending through the annular damping piston (2) and into the hollow cylindrical piston rod (3) is arranged inside the cylinder (1) coaxial with the latter with little circumferential play. At the same time the separating piston (12) separating the equalising chamber (11) from the pneumatic spring chamber (13) is guided inside the inner tube (6). <IMAGE>