EP1283141A1 - Gas-hydraulic damping device - Google Patents

Gas-hydraulic damping device Download PDF

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Publication number
EP1283141A1
EP1283141A1 EP02405588A EP02405588A EP1283141A1 EP 1283141 A1 EP1283141 A1 EP 1283141A1 EP 02405588 A EP02405588 A EP 02405588A EP 02405588 A EP02405588 A EP 02405588A EP 1283141 A1 EP1283141 A1 EP 1283141A1
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EP
European Patent Office
Prior art keywords
gas
oil
flange
plunger
damping device
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Granted
Application number
EP02405588A
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German (de)
French (fr)
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EP1283141B1 (en
Inventor
Otto Ziegler
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Schwab Verkehrstechnik AG
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Schwab Verkehrstechnik AG
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Publication of EP1283141A1 publication Critical patent/EP1283141A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G9/00—Draw-gear
    • B61G9/04—Draw-gear combined with buffing appliances
    • B61G9/08—Draw-gear combined with buffing appliances with fluid springs or fluid shock-absorbers; Combinations thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00—Buffers
    • B61G11/12—Buffers with fluid springs or shock-absorbers; Combinations thereof

Definitions

  • the invention relates to a gas-hydraulic damping device according to the preamble of claim 1.
  • Gas-hydraulic damping devices for shock and / or pulling devices from Rail vehicles are in various designs, for example in the form of Buffering, known.
  • a generic damping device can, for example can also be used for clutches, by means of which rail vehicles are springy get connected.
  • the Buffer is in the unloaded, i.e. shown sprung state.
  • the buffer has one on the rail vehicle (not shown) to be attached buffer sleeve 1 and a Buffer tappet 2 with an outer tappet tube 4, an inner plunger tube 5 and one Buffer plate 3 on. Both the tappet tube 4 and the plunger tube 5 are in Active connection with the buffer plate 3.
  • the plunger tube 5 is on the vehicle side of one Flange 6 closed, the latter being formed by two separate flange parts 6a, 6b becomes. In its interior, the plunger tube 5 forms a gas space 8 for receiving a gas under an overpressure of approx. 10-20 bar and a partial amount of the hydraulic medium.
  • An oil space 9 is formed in the interior of the buffer sleeve 1.
  • the buffer 8 is in the idle state of the gas chamber 8, in part with hydraulic oil filled, while the oil space 9 is completely filled with hydraulic oil.
  • the left one Flange part 6b forms together with a valve arrangement 13 accommodated therein a gas-hydraulic control device 12, which the when the buffer is deflected Flow of the oil from the oil space 9 into the gas space 8 as a function of the acting one Shock forces regulates.
  • the right flange part 6a has an annular circumferential projection 17 and acts together with channels, recesses, Bores and valves as a venting arrangement 7, their structure and mode of operation is then explained in more detail. However, from the representation according to FIG only one channel 20a with a valve flap 19a arranged therein can be seen.
  • the valve arrangement 13 Recess 15 In the right flange part 6a is a central one, which adjoins the valve arrangement 13 Recess 15 recessed. From this recess 15 leads a bore 16 in substantially radially upwards, where they on the left side of the projection 17 in the Oil room 9 opens. Between the projection 17 of the flange 6a and the wall 10 there is an annular gap 18 in the oil space 9. About this annular gap 18 If the buffer compresses, any accumulated in the upper part of the oil space 9 Gas to the left side of the projection 17, from where it goes through the bore 16 in the Recess 15 and via the valve arrangement 13 opened by the excess pressure can flow back the gas space 8.
  • the ventilation arrangement 7 is shown in a perspective view. From this illustration, four channels 20a embedded in the flange part 6a are 20b, 20c, 20d, in each of which a V-shaped valve flap 19a, 19b, 19c, 19d is arranged. Each of these V-shaped valve flaps 19a, 19b, 19c, 19d has two legs, with the following representing all valve flaps 19a, 19b, 19c, 19d only on the two legs 21, 22 of one valve flap 19a is referred to. The two legs 21, 22 of the respective valve flap 19a resiliently lie on the side walls of the respective one in the rest state shown here Channel 20a and close it.
  • the two legs 21, 22nd are pressed against the spring force - deflected - so that in the respective Channel 20a creates a passage through which the oil displaced from the oil space in the central recess 15 can reach.
  • the essentially radial through the Flange part 6a running bore 16 can also be seen from this illustration.
  • the inside diameter of the oil space 9 narrows towards the right towards the vehicle, so that the annular gap 18 between the projection 17 and the wall of the oil space 9 reduced with increasing insertion of the buffer plunger 2.
  • venting arrangement 7 When deflecting of the buffer, the outer tappet tube 4 moves together with the inner one Plunger tube 5 and the flange 6 to the right. Thereby oil flows and that in the Upper part of the oil space 9 possibly accumulated gas from the oil space 9 via the ring-shaped Gap 18 on the left side of the projection 17 of the flange 6a. By in the oil room 9 prevailing excess pressure, the gas is in the upper part of the oil space 9 opening bore 16 displaced into the recess 15, from where it is via the valve assembly 13 enters the gas space 8.
  • the venting arrangement 7 shown is simple and inexpensive to implement.
  • the V-shaped valve flaps 19a, 19b, 19c, 19d have the advantage that at high compression speeds they only give the oil flowing through a very great deal oppose little resistance.

Abstract

The device has a box (1) and a plunger (2), with one having a first gas chamber (8) under excess pressure, and the other having an oil chamber (9) filled with hydraulic fluid. A gas-hydraulic regulator unit (12) between box and plunger has a ventilation unit (7) in front of it. This has a bore (16) opening into the upper section of the oil chamber, and a channel (20), to connect the regulator unit to the oil chamber. The channel is closed by a spring-loaded valve (19). The valve is switched or moved against the spring force by the oil flowing into the oil chamber.

Description

Die Erfindung betrifft eine gashydraulische Dämpfungseinrichtung gemäss dem Oberbegriff des Anspruchs 1.The invention relates to a gas-hydraulic damping device according to the preamble of claim 1.

Gashydraulische Dämpfungseinrichtungen für Stoss- und/oder Zugeinrichtungen von Schienenfahrzeugen sind in verschiedensten Ausführungen, beispielsweise in Form von Puffern, bekannt. Eine gattungsgemässe Dämpfungseinrichtung kann jedoch beispielsweise auch für Kupplungen verwendet werden, mittels welchen Schienenfahrzeuge federnd verbunden werden.Gas-hydraulic damping devices for shock and / or pulling devices from Rail vehicles are in various designs, for example in the form of Buffering, known. However, a generic damping device can, for example can also be used for clutches, by means of which rail vehicles are springy get connected.

Bei gashydraulischen Dämpfungseinrichtungen ohne physisches Trennmittel zwischen dem Gas und dem Hydraulikmedium besteht grundsätzlich die Gefahr, dass sich im Ölraum mit der Zeit Gas ansammelt, was natürlich unerwünscht ist und zu Fehlfunktionen führen kann. Beispielweise kann sich dies bei Puffern in einem undefiniertem bzw. ungenügendem Federverhalten äussern. Insbesondere durch starke Aufstösse besteht bei Puffern die Gefahr, dass Gas vom Gasraum in den Ölraum gelangt.With gas-hydraulic damping devices without physical separating means between the gas and the hydraulic medium there is a fundamental risk that the Oil space accumulates gas over time, which of course is undesirable and causes malfunctions can lead. For example, this can be the case with buffers in an undefined or express inadequate spring behavior. Especially due to strong belches in the case of buffers, there is a risk that gas will enter the oil space from the gas space.

Es ist daher die Aufgabe der Erfindung, eine gemäss dem Oberbegriff des Anspruchs 1 ausgebildete gashydraulische Dämpfungseinrichtung vorzuschlagen, welche sich während des Betriebs selber entlüftet, indem das sich im Ölraum ggf. angesammelte Gas selbsttätig in den Gasraum zurückgeführt wird.It is therefore the object of the invention, one according to the preamble of claim 1 to propose trained gas-hydraulic damping device, which during vented by operating the gas that may have accumulated in the oil space is automatically returned to the gas space.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 angeführten Merkmale gelöst.This object is achieved by the features stated in the characterizing part of claim 1 solved.

Bevorzugte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen 2 bis 7 umschrieben.Preferred embodiments of the invention are in dependent claims 2 to 7 circumscribed.

Die Erfindung wird nachfolgend anhand von Zeichnungen näher erläutert. In diesen Zeichnungen zeigt:

  • Fig. 1 einen Längsschnitt durch eine gashydraulische Dämpfungseinrichtung in Form eines Puffers, und
  • Fig. 2 eine perspektivische Ansicht einer Entlüftungsanordnung.
    • The invention is explained in more detail below with reference to drawings. In these drawings:
  • Fig. 1 shows a longitudinal section through a gas-hydraulic damping device in the form of a buffer, and
  • Fig. 2 is a perspective view of a vent assembly.

    • Anhand der Fig. 1, welche einen Längsschnitt durch eine gashydraulische Dämpfungseinrichtung in Form eines Puffers mitsamt einer erfindungsgemäss gestalteten Entlüftungsanordnung zeigt, wird der grundsätzliche Aufbau des Puffers näher erläutert. Der Puffer ist im entlasteten, d.h. ausgefederten Zustand dargestellt. Der Puffer weist eine am Schienenfahrzeug (nicht dargestellt) zu befestigende Pufferhülse 1 sowie einen Pufferstössel 2 mit einem äusseren Stösselrohr 4, einem inneren Plungerrohr 5 und einem Pufferteller 3 auf. Sowohl das Stösselrohr 4 wie auch das Plungerrohr 5 stehen in Wirkverbindung mit dem Pufferteller 3. Das Plungerrohr 5 ist fahrzeugseitig von einem Flansch 6 verschlossen, welch letzterer durch zwei separate Flanschteile 6a, 6b gebildet wird. In seinem Innenraum bildet das Plungerrohr 5 einen Gasraum 8 zur Aufnahme eines unter einem Überdruck von ca. 10-20 bar stehenden Gases sowie einer Teilmenge des Hydraulikmediums.1, which shows a longitudinal section through a gas-hydraulic damping device in the form of a buffer together with a ventilation arrangement designed according to the invention shows, the basic structure of the buffer is explained in more detail. The Buffer is in the unloaded, i.e. shown sprung state. The buffer has one on the rail vehicle (not shown) to be attached buffer sleeve 1 and a Buffer tappet 2 with an outer tappet tube 4, an inner plunger tube 5 and one Buffer plate 3 on. Both the tappet tube 4 and the plunger tube 5 are in Active connection with the buffer plate 3. The plunger tube 5 is on the vehicle side of one Flange 6 closed, the latter being formed by two separate flange parts 6a, 6b becomes. In its interior, the plunger tube 5 forms a gas space 8 for receiving a gas under an overpressure of approx. 10-20 bar and a partial amount of the hydraulic medium.

    Im Innenraum der Pufferhülse 1 ist ein Ölraum 9 ausgebildet. Im hier dargestellten ausgefederten Ruhezustand des Puffers ist der Gasraum 8 zu einem Teil mit Hydrauliköl gefüllt, währenddem der Ölraum 9 vollständig mit Hydrauliköl gefüllt ist. Der linke Flanschteil 6b bildet zusammen mit einer darin aufgenommenen Ventilanordnung 13 eine gas-hydraulische Regeleinrichtung 12, welche beim Einfedern des Puffers den Durchfluss des Öls vom Ölraum 9 in den Gasraum 8 in Abhängigkeit der einwirkenden Stoss-Kräfte regelt. Der rechte Flanschteil 6a weist einen ringförmig umlaufenden Vorsprung 17 auf und wirkt zusammen mit darin eingelassenen Kanälen, Ausnehmungen, Bohrungen und Ventilen als Entlüftungsanordnung 7, deren Aufbau und Wirkungsweise anschliessend noch näher erläutert wird. Aus der Darstellung gemäss Fig.1 ist jedoch lediglich ein Kanal 20a mit einer darin angeordneten Ventilklappe 19a ersichtlich.An oil space 9 is formed in the interior of the buffer sleeve 1. In the spring-loaded shown here The buffer 8 is in the idle state of the gas chamber 8, in part with hydraulic oil filled, while the oil space 9 is completely filled with hydraulic oil. The left one Flange part 6b forms together with a valve arrangement 13 accommodated therein a gas-hydraulic control device 12, which the when the buffer is deflected Flow of the oil from the oil space 9 into the gas space 8 as a function of the acting one Shock forces regulates. The right flange part 6a has an annular circumferential projection 17 and acts together with channels, recesses, Bores and valves as a venting arrangement 7, their structure and mode of operation is then explained in more detail. However, from the representation according to FIG only one channel 20a with a valve flap 19a arranged therein can be seen.

    In den rechten Flanschteil 6a ist eine zentrale, an die Ventilanordnung 13 angrenzende Ausnehmung 15 eingelassen. Von dieser Ausnehmung 15 führt eine Bohrung 16 im wesentlichen radial nach oben, wo sie auf der linken Seite des Vorsprungs 17 in den Ölraum 9 mündet. Zwischen dem Vorsprung 17 des Flansches 6a und der Wandung 10 des Ölraums 9 besteht ein ringförmiger Spalt 18. Über diesen ringförmigen Spalt 18 gelangt beim Einfedern des Puffers das sich im Oberteil des Ölraums 9 ggf. angesammelte Gas auf die linke Seite des Vorsprungs 17, von wo es über die Bohrung 16 in die Ausnehmung 15 und über die durch den Überdruck geöffnete Ventilanordnung 13 in den Gasraum 8 zurückströmen kann.In the right flange part 6a is a central one, which adjoins the valve arrangement 13 Recess 15 recessed. From this recess 15 leads a bore 16 in substantially radially upwards, where they on the left side of the projection 17 in the Oil room 9 opens. Between the projection 17 of the flange 6a and the wall 10 there is an annular gap 18 in the oil space 9. About this annular gap 18 If the buffer compresses, any accumulated in the upper part of the oil space 9 Gas to the left side of the projection 17, from where it goes through the bore 16 in the Recess 15 and via the valve arrangement 13 opened by the excess pressure can flow back the gas space 8.

    In der Fig. 2 ist die Entlüftungsanordnung 7 in einer perspektivischen Ansicht dargestellt. Aus dieser Darstellung sind vier in den Flanschteil 6a eingelassene Kanäle 20a, 20b, 20c, 20d ersichtlich, in welchen je eine V-förmig ausgebildeten Ventilklappe 19a, 19b, 19c, 19d angeordnet ist. Jede dieser V-förmig ausgebildeten Ventilklappen 19a, 19b, 19c, 19d weist zwei Schenkel auf, wobei nachfolgend stellevertretend für alle Ventilklappen 19a, 19b, 19c, 19d nur auf die beiden Schenkel 21, 22 der einen Ventilklappe 19a Bezug genommen wird. Die beiden Schenkel 21, 22 der jeweiligen Ventilklappe 19a liegen im hier dargestellten Ruhezustand federnd an den Seitenwänden des jeweiligen Kanals 20a an und verschliessen diesen. Durch den beim schnellen Einfedern des Stössels 2 im Ölraum 9 entstehenden Überdruck können die beiden Schenkel 21, 22 entgegen der Federkraft zusammengedrückt -ausgelenkt- werden, so dass im jeweiligen Kanal 20a ein Durchlass entsteht, über den das aus dem Ölraum verdrängte Öl in die zentrale Ausnehmung 15 gelangen kann. Die im wesentlichen radial durch den Flanschteil 6a verlaufende Bohrung 16 ist aus dieser Darstellung ebenfalls ersichtlich. Der Innendurchmesser des Ölraums 9 verengt sich nach rechts zum Fahrzeug hin, so dass sich der Ringspalt 18 zwischen dem Vorsprung 17 und der Wandung des Ölraums 9 mit zunehmendem Einschieben des Pufferstössels 2 verkleinert.2, the ventilation arrangement 7 is shown in a perspective view. From this illustration, four channels 20a embedded in the flange part 6a are 20b, 20c, 20d, in each of which a V-shaped valve flap 19a, 19b, 19c, 19d is arranged. Each of these V-shaped valve flaps 19a, 19b, 19c, 19d has two legs, with the following representing all valve flaps 19a, 19b, 19c, 19d only on the two legs 21, 22 of one valve flap 19a is referred to. The two legs 21, 22 of the respective valve flap 19a resiliently lie on the side walls of the respective one in the rest state shown here Channel 20a and close it. Because of the quick compression of the Plunger 2 in the oil chamber 9 can create excess pressure, the two legs 21, 22nd are pressed against the spring force - deflected - so that in the respective Channel 20a creates a passage through which the oil displaced from the oil space in the central recess 15 can reach. The essentially radial through the Flange part 6a running bore 16 can also be seen from this illustration. The inside diameter of the oil space 9 narrows towards the right towards the vehicle, so that the annular gap 18 between the projection 17 and the wall of the oil space 9 reduced with increasing insertion of the buffer plunger 2.

    Die Funktionsweise der Entlüftungsanordnung 7 stellt sich wie folgt dar: Beim Einfedern des Puffers verschiebt sich das äussere Stösselrohr 4 zusammen mit dem inneren Plungerrohr 5 und dem Flansch 6 nach rechts. Dabei strömt Öl sowie das sich im Oberteil des Ölraums 9 ggf. angesammelte Gas vom Ölraum 9 über den ringförmigen Spalt 18 auf die linke Seite des Vorsprungs 17 des Flansches 6a. Durch den im Ölraum 9 vorherrschenden Überdruck wird das Gas über die in den oberen Teil des Ölraums 9 mündende Bohrung 16 in die Ausnehmung 15 verdrängt, von wo es über die Ventilanordnung 13 in den Gasraum 8 gelangt. Da die vier in den Flanschteil 6a eingelassenen Kanäle 20a, 20b, 20c, 20d im Ruhezustand von je einer Ventilklappe 19a, 19b, 19c, 19d verschlossen sind, entsteht beim Verschieben des Stössels 2 bzw. des Plungerrohrs 5 mitsamt dem Flansch 6 ein Staudruck, welcher bewirkt, dass bereits bei tiefen Einfedergeschwindigkeiten das ggf. aus dem Ölraum 9 zu verdrängende Gas zwingend über die radiale Bohrung 16 entweicht.The operation of the venting arrangement 7 is as follows: When deflecting of the buffer, the outer tappet tube 4 moves together with the inner one Plunger tube 5 and the flange 6 to the right. Thereby oil flows and that in the Upper part of the oil space 9 possibly accumulated gas from the oil space 9 via the ring-shaped Gap 18 on the left side of the projection 17 of the flange 6a. By in the oil room 9 prevailing excess pressure, the gas is in the upper part of the oil space 9 opening bore 16 displaced into the recess 15, from where it is via the valve assembly 13 enters the gas space 8. Since the four embedded in the flange part 6a Channels 20a, 20b, 20c, 20d in the idle state of one valve flap 19a, 19b, 19c, 19d are closed, arises when the plunger 2 or the plunger tube 5 is moved together with the flange 6, a dynamic pressure, which causes even at low compression speeds the gas that may be displaced from the oil space 9 is mandatory escapes via the radial bore 16.

    Bei hohen Einfedergeschwindigkeiten wird ein entsprechend grosser Überdruck im Ölraum 9 erzeugt. Dieser bewirkt, dass die beiden Schenkel 21, 22 der jeweiligen Ventilklappe 19a zusammengedrückt werden, so dass das Öl ohne nennenswerten Widerstand am jeweiligen Ventil 19a, 19b, 19c, 19d vorbei durch den entsprechenden Kanal 20a, 20b, 20c, 20d strömen kann. Bei hohen Einfedergeschwindigkeiten kann das Öl demnach über alle vier Kanäle 20a, 20b, 20c, 20d vom Ölraum in die Ausnehmung 15 strömen, während bei tiefen Einfedergeschwindigkeiten das sich im Ölraum 9 angesammelte Gas zwingend über die radiale Bohrung 16 entweicht.At high compression speeds, there is a correspondingly large overpressure in the oil space 9 generated. This causes the two legs 21, 22 of the respective valve flap 19a are compressed so that the oil has no significant resistance past the respective valve 19a, 19b, 19c, 19d through the corresponding channel 20a, 20b, 20c, 20d can flow. At high compression speeds the oil can accordingly via all four channels 20a, 20b, 20c, 20d from the oil space into the recess 15 flow while at low compression speeds that accumulated in the oil space 9 Gas necessarily escapes via the radial bore 16.

    Da im regulären Betrieb eines Puffers jedoch praktisch nie zwei starke, eine hohe Einfedergeschwindigkeit des Pufferstössels bewirkende Aufstösse aufeinander folgen, sondern dazwischen immer mehrere kleine und langsame Hübe erfolgen, wird durch die dargestellte Entlüftungsanordnung 7 ein zuverlässiges, zwangsweises Entlüften des Ölraums 9 sichergestellt.Since in normal operation of a buffer, however, there are practically never two strong, high compression rates impacts causing the buffer tappet follow one another, but there are always several small and slow strokes in between, is achieved by the shown venting arrangement 7 a reliable, forced venting of the Oil space 9 ensured.

    Die gezeigte Entlüftungsanordnung 7 ist einfach aufgebaut und kostengünstig zu realisieren. Die V-förmig ausgebildeten Ventilklappen 19a, 19b, 19c, 19d haben den Vorteil, dass sie bei hohen Einfedergeschwindigkeiten dem durchströmenden Öl nur einen sehr geringen Widerstand entgegensetzen.The venting arrangement 7 shown is simple and inexpensive to implement. The V-shaped valve flaps 19a, 19b, 19c, 19d have the advantage that at high compression speeds they only give the oil flowing through a very great deal oppose little resistance.

    Claims (7)

    Gashydraulische Dämpfungseinrichtung, insbesondere für Stoss- und/oder Zugeinrichtungen von Schienenfahrzeugen, mit einer Hülse (1) und einem relativ dazu verschiebbaren Stössel (2), wobei im Stössel (2) oder in der Hülse (1) ein erster, mittels eines Gases unter Überdruck gesetzter Gasraum (8) angeordnet ist und wobei in der Hülse (1) oder im Stössel (2) ein sich mit zunehmender Einfederung des Stössels (2) verkleinernder, mit Hydraulikmedium gefüllter Ölraum (9) angeordnet ist, und wobei zwischen den beiden Räumen (8, 9) eine gashydraulische Regeleinrichtung (12) angeordnet ist, dadurch gekennzeichnet, dass der gashydraulischen Regeleinrichtung (12) eine Entlüftungsanordnung (7) vorgeschaltet ist, welche mit einer in den oberen Teil des Ölraums (9) mündenden Bohrung (16) versehen ist und zumindest einen den Ölraum (9) mit der Regeleinrichtung (12) verbindenden Kanal (20) aufweist, der von einem federbelasteten Ventil (19) verschliessbar ist, wobei das Ventil (19) von dem vom Ölraum (9) in den Gasraum (8) strömenden Öl entgegen der Federkraft verschiebbar oder auslenkbar ist.Gas-hydraulic damping device, in particular for pushing and / or pulling devices of rail vehicles, with a sleeve (1) and a plunger (2) which can be displaced relative thereto, the first in the plunger (2) or in the sleeve (1) using a gas The gas chamber (8), which is set to overpressure, is arranged and in the sleeve (1) or in the plunger (2) there is an oil chamber (9), which decreases with increasing deflection of the plunger (2) and is filled with hydraulic medium, and wherein between the two rooms (8, 9) a gas-hydraulic control device (12) is arranged, characterized in that the gas-hydraulic control device (12) is preceded by a ventilation arrangement (7) which has a bore (16) opening into the upper part of the oil space (9) and has at least one channel (20) connecting the oil chamber (9) to the control device (12), which can be closed by a spring-loaded valve (19), the valve (19) from the oil flowing from the oil space (9) into the gas space (8) can be displaced or deflected against the spring force. Gashydraulische Dämpfungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Entlüftungsanordnung (7) einen kolbenförmig ausgebildeten, mit dem Stössel (2) in Wirkverbindung stehenden und im Ölraum (9) verschiebbaren Flansch (6) aufweist, in welch letzterem die in den Ölraum (9) mündende Bohrung (16) sowie der zumindest eine, den Ölraum (9) mit der Regeleinrichtung (12) verbindende Kanal (20) angeordnet ist.Gas-hydraulic damping device according to claim 1, characterized in that the ventilation arrangement (7) has a piston-shaped flange (6) which is operatively connected to the tappet (2) and is displaceable in the oil chamber (9), in which flange the flange (6) enters the oil chamber (9 ) opening (16) and the at least one channel (20) connecting the oil chamber (9) to the control device (12) is arranged. Gashydraulische Dämpfungseinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Flansch (6) einen ringförmig umlaufenden Vorsprung (17) aufweist, dessen Aussendurchmesser kleiner ist als er Innendurchmesser des Ölraums (9), so dass zwischen dem Vorsprung (17) und dem Ölraum (9) ein ringförmiger Spalt (18) besteht, wobei die Bohrung (16) und der Kanal (20) bzw. die Kanäle auf der dem Ölraum (9) abgewandten Seite des Vorsprungs (17) radial aus dem Flansch (6) führen.Gas-hydraulic damping device according to claim 1 or 2, characterized in that the flange (6) has an annular circumferential projection (17), the outside diameter of which is smaller than the inside diameter of the oil space (9), so that between the projection (17) and the oil space (9) there is an annular gap (18), the bore (16) and the channel (20) or the channels on the side of the projection (17) facing away from the oil space (9) leading radially out of the flange (6). Gashydraulische Dämpfungseinrichtung nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der Flansch (6) zweiteilig ausgebildet ist, wobei im einen Flanschteil (6b) die gas-hydraulische Regeleinrichtung (12) und im anderen Flanschteil (6a) die Entlüftungsanordnung (7) angeordnet ist. Gas-hydraulic damping device according to claim 2 or 3, characterized in that the flange (6) is formed in two parts, the gas-hydraulic control device (12) being arranged in one flange part (6b) and the ventilation arrangement (7) being arranged in the other flange part (6a) , Gashydraulische Dämpfungseinrichtung nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass der Pufferstössel (2) mit einem inneren Plungerrohr (5) versehen ist, an welchem der im Ölraum (9) verschiebbare Flansch (6) endseitig angeordnet ist.Gas-hydraulic damping device according to one of claims 2 to 4, characterized in that the buffer tappet (2) is provided with an inner plunger tube (5) on which the flange (6) which is displaceable in the oil chamber (9) is arranged at the end. Gashydraulische Dämpfungseinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass V-förmig gestaltete Ventilklappen (19a) vorgesehen sind, deren beide Schenkel (21, 22) im Ruhezustand federnd an den Seitenwänden des jeweiligen Kanals (20) anliegen und diesen verschliessen, wobei die beiden Schenkel (21, 22) durch den beim Einfedern des Stössels (2) im Ölraum (9) entstehenden Druckanstieg entgegen der Federkraft derart auslenkbar sind, dass ein Durchlass entsteht.Gas-hydraulic damping device according to one of the preceding claims, characterized in that V-shaped valve flaps (19a) are provided, the two legs (21, 22) of which resiliently rest against the side walls of the respective channel (20) and close it, the Both legs (21, 22) can be deflected against the spring force by the pressure rise occurring when the plunger (2) is deflected in the oil chamber (9) in such a way that a passage is created. Gashydraulische Dämpfungseinrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass sich der Innendurchmesser des Ölraums (9) nach rechts zum Fahrzeug hin verengt, so dass sich der Ringspalt (18) zwischen dem Vorsprung (17) und der Wandung des Ölraums (9) mit zunehmendem Einschieben des Pufferstössels (2) verkleinert.Gas-hydraulic damping device according to one of claims 3 to 6, characterized in that the inner diameter of the oil space (9) narrows to the right towards the vehicle, so that the annular gap (18) between the projection (17) and the wall of the oil space (9 ) reduced with increasing insertion of the buffer plunger (2).
    EP02405588A 2001-08-10 2002-07-11 Gas-hydraulic damping device Expired - Lifetime EP1283141B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    CH14732001 2001-08-10
    CH14732001 2001-08-10

    Publications (2)

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    EP1283141A1 true EP1283141A1 (en) 2003-02-12
    EP1283141B1 EP1283141B1 (en) 2005-06-08

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    ID=4565506

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP02405588A Expired - Lifetime EP1283141B1 (en) 2001-08-10 2002-07-11 Gas-hydraulic damping device

    Country Status (6)

    Country Link
    EP (1) EP1283141B1 (en)
    AT (1) ATE297334T1 (en)
    DE (1) DE50203314D1 (en)
    ES (1) ES2243679T3 (en)
    NO (1) NO20023439L (en)
    PL (1) PL199515B1 (en)

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3731771A (en) * 1972-02-17 1973-05-08 Pittsburgh Forging Co Pneumatic-hydraulic shock absorber
    EP0133157A2 (en) * 1983-07-20 1985-02-13 Schweizerische Aluminium Ag Shock absorber
    US4805517A (en) * 1987-11-16 1989-02-21 Rail Car America, Inc. Gas return railway car hydraulic cushioning unit and method of converting a spring return unit
    US5845796A (en) * 1996-05-01 1998-12-08 Miner Enterprises, Inc. Elastomer spring/hydraulic shock absorber cushioning device

    Patent Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3731771A (en) * 1972-02-17 1973-05-08 Pittsburgh Forging Co Pneumatic-hydraulic shock absorber
    EP0133157A2 (en) * 1983-07-20 1985-02-13 Schweizerische Aluminium Ag Shock absorber
    US4805517A (en) * 1987-11-16 1989-02-21 Rail Car America, Inc. Gas return railway car hydraulic cushioning unit and method of converting a spring return unit
    US5845796A (en) * 1996-05-01 1998-12-08 Miner Enterprises, Inc. Elastomer spring/hydraulic shock absorber cushioning device

    Also Published As

    Publication number Publication date
    DE50203314D1 (en) 2005-07-14
    ES2243679T3 (en) 2005-12-01
    EP1283141B1 (en) 2005-06-08
    PL355253A1 (en) 2003-02-24
    PL199515B1 (en) 2008-09-30
    NO20023439D0 (en) 2002-07-17
    NO20023439L (en) 2003-02-11
    ATE297334T1 (en) 2005-06-15

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