Damping valve device with a progressive evolution of the damping force.

摘要

Hydraulic vibration damper a) with a tube (2) container, a rod (8) movable plunger swingably inside the tube (2) container and penetrating at one end into said tube (2), being arranged in its end opposite the tube (2) end container a plunger (1) work, which has flow channels for liquid operant damper in the direction of expansion and compression, and dividing the interior of the container tube in a chamber ( 40) side expansion piston rod and a chamber (30) remote from the piston rod compression, being able to seal at least a first channel (6) of step to form a damping valve with a first disc (3) valve elastic or resiliently loaded, which cooperates with a first seat (10) valve, b) with a valve (4) pressure relief (valve "blow-off" [purge]) having a "blow-off" function ( purge), which opens at a level pre sion predeterminable, c) and with a first zone (5) throttle, which generates a damping force that runs progressively increasing speed of the piston and whose throttle cross-section is variable depending on the piston speed of the vibration damper, characterized in that d) the valve (4) pressure relief, having the purging function, has a first disc (11) ring associated with the first disk (3) valve with a facing the first disc (3) valve surface, which forms the first zone (5) variable throttle with the first disc (3) valve, e) and that the valve (4) purge has a cylindrical body (12) with a shoulder (13) radially extending inwardly and forms a stirrup for the disc (11) ring.