Liquid tight shock absorber for vehicles and machines - has elastic element arranged between two fixing elements connected respectively to part producing or receiving vibrations and part receiving or producing vibrations.

摘要

The shock absorber (10) also has a liquid chamber (42) for accepting pressure. This chamber uses the elastic element (24) as a part of the separation wall of the chamber, which is able to expand and contract. An auxiliary liquid chamber (44) is arranged at a distance from the chamber (42), and the two chambers communicate mutually across a narrow passage (56). A vibration element (38) is held from the second or first fixing element across an elastic element (40), so that it moves along a predetermined direction. The vibration element (38) forms a part of a further separation wall of the chamber (42), and is subjected to the hydraulic pressure of the pressure receiving liquid chamber (42). A solenoid (70) moves the vibration element (38) in one of two predetermined directions and has a unit (70C) for producing a magnetic field and an element (70A) movable in one of the two predetermined directions, if subjected to the magnetic field. A spring (78) moves the vibration element (38) in the other or both predetermined directions. ADVANTAGES - Diaphragm can be vibrated and HF vibrations reliably absorbed, while maintaining restoring power.