Spring device

A spring device arrangement comprising a supporting plate, a substructure and a spring device located between the supporting plate and the substructure, said spring device consisting of two spring systems connected in parallel, each spring system in turn comprising three springs arranged parallel to each other, namely a first spring, a second spring and a third spring, characterized in that

• the first spring is an air spring comprising a bellows made of elastomeric material and connecting the supporting plate with the upper part of a roll-off piston by utilizing securing means, the first springs of the spring systems being connected with each other in a pressure-compensating manner by means of an overflow duct;
• the second spring is mounted outside the first spring and extends from the supporting plate to the substructure;
• and
• the third spring is installed within the roll-off piston of the first spring, simultaneously using a pressure piston for transmitting force, said pressure piston resting with its lower part on the third spring and projecting with its upper part, which is provided with an end stop, into the interior of the first spring, the pressure piston having inside the region of contact with the roll-off piston a vertical slide surface as well as a stepped stop which produces a pretension in conjunction with the third spring, the upper part of the pressure piston having at least one passage opening connecting the interior of the first spring with the interior of the roll-off piston, and
• said substructure comprises a top plate and a bottom plate and is equipped with additional springs arrangement between said top and bottom plates.