Spring devices – Vehicle – Compound
Patent
1998-06-05
2000-08-15
Oberleitner, Robert J.
Spring devices
Vehicle
Compound
267 6424, 267190, 105453, B60G 1156
Patent
active
061023787
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field OF the Invention
The invention relates to a spring device particularly in the sector of rail-borne vehicles, and there especially for spring suspension between a bogie and a coach body. The spring device is arranged between a supporting plate and a substructure and consists of two spring systems I and II connected in parallel. Each spring system comprises three springs arranged parallel to each other, namely a first spring A, a second spring B and a third spring C. Such a spring device is known from DE 34 12 547.
2. The Prior Art
In order to assure safety against derailment with a spring device according to DE 34 12 547 as well as with other known spring devices (DE-B-11 90 811; DE-B-20 60 960; DE-B-24 40 069; DE-C-44 04 878; FR-A-812 045; JP-A-4/29631) also in emergency operations, costly additional bogie constructions were required in the coach body heretofore in most cases, or a larger installation space is needed for the spring device. The greatest problems arise in this connection of a relatively long and torsion-resistant coach body tube has to be taken into account, and proof of safety against detailing has to be furnished for emergency operations.
Now, based on said state of the art the problem of the invention is to improve the safety against derailment in emergency operations while avoiding complicated and cost-intensive coach body constructions, i.e., to improve such safety in the twisting platform in the event of failure of the spring devices known until now.
SUMMARY OF THE INVENTION
This problem is solved by a spring device according to the characteristics of patent claim 1, i.e. by using springs A, B and C described below in more detail.
Spring A is an air or hydropneumatic spring comprising a bellows made of elastomeric material (i.e., rubber or rubber-like plastic), which, with securing means, connects the supporting plate with the upper part of a roll-off piston.
Springs A of the two parallel connected spring systems I and II are connected with each other in a pressure-equalizing manner by means of an overflow duct, whereby the overflow duct extends in particular within the supporting plate and is connected with a valve, which is arranged between the two spring systems.
The supporting plate is advantageously provided within spring A with a stop with an integrated inlet opening.
Spring B, which in particular has the form of a spiral spring made of steel or elastomeric material, is arranged outside of spring A and extends from the supporting plate up to the substructure.
Spring C also has in particular the form of a spiral spring made of steel or elastomeric material and is installed within the roll-off piston of spring A, using at the same time a pressure piston for transmitting force, said pressure piston resting with its lower part on spring C particularly in connection with a flange-like widening, and projecting with its upper part, the latter being provided with a face-like stop, into the interior of spring A, whereby the pressure piston has a vertical slide surface within the area of contact with the roll-off piston, as well as a step-like stop, which in conjunction with spring C produces pretension.
The face-like stop of the pressure piston is advantageously designed in the form of a plate particularly in connection with a plastic layer. Said stop is mounted directly opposite the supporting plate.
The substructure of the spring device is usefully equipped with additional springs particularly in the form of elastomer springs or metal/elastomer-layered springs, whereby the substructure advantageously consists of a top plate and a bottom plate, with the springs being arranged between said plates.
The two parallel connected spring systems I and II are fully arranged with the same height.
BRIEF DESCRIPTION OF THE DRAWING
The invention is now explained with the help of an exemplified embodiment and by reference to a schematic drawing depicting an embodiment of the spring device arrangement according to the invention.
DETAILED DESCRIPTION OF PREF
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Gieseler Eckhard
Lambrecht Dirk
King Bradley
Oberleitner Robert J.
Phoenix Aktiengesellschaft
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