EP1283142B1 - Buffer for railway vehicles - Google Patents

Buffer for railway vehicles Download PDF

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Publication number
EP1283142B1
EP1283142B1 EP02405589A EP02405589A EP1283142B1 EP 1283142 B1 EP1283142 B1 EP 1283142B1 EP 02405589 A EP02405589 A EP 02405589A EP 02405589 A EP02405589 A EP 02405589A EP 1283142 B1 EP1283142 B1 EP 1283142B1
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EP
European Patent Office
Prior art keywords
buffer
intermediate element
plunger tube
plate
buffer plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02405589A
Other languages
German (de)
French (fr)
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EP1283142A1 (en
Inventor
Otto Ziegler
Elio Tommasini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schwab Verkehrstechnik AG
Original Assignee
Schwab Verkehrstechnik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Schwab Verkehrstechnik AG filed Critical Schwab Verkehrstechnik AG
Publication of EP1283142A1 publication Critical patent/EP1283142A1/en
Application granted granted Critical
Publication of EP1283142B1 publication Critical patent/EP1283142B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00—Buffers
    • B61G11/18—Details
    • 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 buffer for rail vehicles according to the preamble of Claim 1.
  • buffers also known gas-hydraulic buffer.
  • These buffers are gas-hydraulic Damping usually from a closed cartridge, which as finished Component is inserted into the buffer such that the buffer plunger on the gas-hydraulic Damping element is supported on the buffer sleeve.
  • gas-hydraulic buffer in which the gas-hydraulic damping device is integrated into the buffer, so no actual cartridge is used comes.
  • Such a known buffer has a on the rail vehicle to be attached buffer sleeve and a buffer ram with an external Pusher tube, an inner plunger tube and a buffer plate on. The pushrod becomes guided on the outside of the buffer sleeve.
  • Both the ram and the tube Plunger tube are in operative connection with the buffer plate.
  • the plunger tube is double-sided each closed by a flange. In its interior, the plunger tube forms a Gas space for receiving a pressure of approx. 10-20 bar Gas and a subset of the hydraulic medium.
  • the buffer sleeve is in the Buffer plate facing end portion provided with an annular groove in which a V-shaped seal is added. This seals the gap between the plunger tube and the buffer sleeve and thus also the oil space to the outside.
  • the buffer has a buffer sleeve (not shown) to be fastened to the rail vehicle 1 and a plunger assembly 2.
  • the latter consists of an outer one Pusher tube 3 with an attached buffer pad 4 and an inner plunger tube 5.
  • the plunger tube 5 is closed on both sides by a respective flange 6, 7.
  • a gas chamber 8 for receiving a below an overpressure of about 10-20 bar standing gas and a subset of Hydraulic medium.
  • an oil chamber 9 is formed in the interior of the buffer sleeve 1. In the rebounded state shown here, the gas space 8 to a Part filled with hydraulic oil while the oil chamber 9 is completely filled with hydraulic oil is.
  • the vehicle-side valve flange 7 forms together with a recorded therein Valve assembly 13, a gas-hydraulic control device 12, which the plunger assembly 2 endeavor to keep in the rest position shown here. moreover is acted upon by the gas-hydraulic control device 12 on the buffer plate 4 Shock forces the flow between the oil chamber 9 and the gas space 8 in Controlled dependence of the acting forces. Because the basic mode of action the control device 12 is known, will not be discussed in detail.
  • This wire 19 is used first Line as an assembly aid, by means of which the intermediate element 15 on the disc 10 and so that it is fixed to the plunger tube 5. Furthermore, the bracket 20 also serves as a positioning aid, which the angular position of the plunger tube 5 about the longitudinal central axis 22 in relation to the buffer plate 4 and thus determines the entire buffer.
  • the buffer sleeve 1 wrapped around the circumference plastic bands 27, which form a kind of plain bearing for the ram pipe 3.
  • the plunger tube 5 is largely parallel to Inserted longitudinal center axis 22 of the ram tube, as an eccentric deflection the buffer plate 4 of the "floating" between the buffer plate 4 and the Washer 10 mounted intermediate member 15 is received by facing each other the buffer plate 4 automatically centered in the radial direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Vehicle Body Suspensions (AREA)
  • Platform Screen Doors And Railroad Systems (AREA)
  • Memory System Of A Hierarchy Structure (AREA)

Abstract

The buffer has a buffer box (1) on the train side and a relatively moveable gas-hydraulic buffer plunger unit (2) with plate (4) and tube (5). A radially moveable intermediate element (15) is positioned floating between plate and tube, to transmit eccentric forces acting on the plate, centrally onto the buffer tube. The tube has a disc (10) facing the intermediate element to support it. Buffer plate, disc, and intermediate element are of a plastic having good sliding characteristics.

Description

Die Erfindung betrifft einen Puffer für Schienenfahrzeuge gemäss dem Oberbegriff des Anspruchs 1.The invention relates to a buffer for rail vehicles according to the preamble of Claim 1.

Nebst den herkömmlichen mit mechanischen Federpaketen versehenen Puffern sind auch gas-hydraulische Puffer bekannt. Bei diesen Puffern besteht das gas-hydraulische Dämpfungselement üblicherweise aus einer abgeschlossenen Patrone, welche als fertiges Bauteil derart in den Puffer eingesetzt wird, dass der Pufferstössel über das gas-hydraulische Dämpfungselement an der Pufferhülse abgestützt ist. Daneben sind aber auch gas-hydraulische Puffer bekannt, bei denen die gas-hydraulische Dämpfungseinrichtung in den Puffer integriert ist, so dass keine eigentliche Patrone zum Einsatz kommt. Ein derartiger bekannten Puffer weist eine am Schienenfahrzeug zu befestigende Pufferhülse sowie einen Pufferstössel mit einem äusseren Stösselrohr, einem inneren Plungerrohr und einem Pufferteller auf. Das Stösselrohr wird an der Aussenseite der Pufferhülse geführt. Sowohl das Stösselrohr wie auch das Plungerrohr stehen in Wirkverbindung mit dem Pufferteller. Das Plungerrohr ist beidseitig von je einem Flansch verschlossen. In seinem Innenraum bildet das Plungerrohr einen Gasraum zur Aufnahme eines unter einem Überdruck von ca. 10-20 bar stehenden Gases sowie einer Teilmenge des Hydraulikmediums. Die Pufferhülse ist in dem dem Pufferteller zugewandten Endbereich mit einer ringförmigen Nut versehen, in welcher eine V-förmig gestaltete Dichtung aufgenommen ist. Diese dichtet den Spalt zwischen dem Plungerrohr und der Pufferhülse und damit auch den Ölraum nach aussen hin ab.In addition to the conventional provided with mechanical spring packs buffers also known gas-hydraulic buffer. These buffers are gas-hydraulic Damping usually from a closed cartridge, which as finished Component is inserted into the buffer such that the buffer plunger on the gas-hydraulic Damping element is supported on the buffer sleeve. But there are Also known gas-hydraulic buffer, in which the gas-hydraulic damping device is integrated into the buffer, so no actual cartridge is used comes. Such a known buffer has a on the rail vehicle to be attached buffer sleeve and a buffer ram with an external Pusher tube, an inner plunger tube and a buffer plate on. The pushrod becomes guided on the outside of the buffer sleeve. Both the ram and the tube Plunger tube are in operative connection with the buffer plate. The plunger tube is double-sided each closed by a flange. In its interior, the plunger tube forms a Gas space for receiving a pressure of approx. 10-20 bar Gas and a subset of the hydraulic medium. The buffer sleeve is in the Buffer plate facing end portion provided with an annular groove in which a V-shaped seal is added. This seals the gap between the plunger tube and the buffer sleeve and thus also the oil space to the outside.

Eine grundsätzliche Problematik bei einem derart ausgebildeten Puffer besteht darin, dass der Pufferstössel bei exzentrischer Krafteinleitung schräg eingeschoben wird und sich dabei leicht verkanten kann. Dadurch wird auch das Plungerrohr "schräg" eingeschoben. Es versteht sich, dass dies unerwünscht ist, da dabei die Pufferhülse in radialer Richtung stark belastet wird und insbesondere die genannte V-förmige Dichtung einem erhöhten Verschleiss ausgesetzt wird, was letztlich zu Undichtigkeiten des gas-hydraulischen Dämpfungselements führen kann und zu einer Reduktion der Lebensdauer führt bzw. eine Wartung erfoderlich macht.A fundamental problem with such a buffer is that that the buffer plunger is slanted at eccentric force introduction and can easily tilt. As a result, the plunger tube is inserted "obliquely". It is understood that this is undesirable, as doing the buffer sleeve in the radial Direction is heavily loaded and in particular the said V-shaped seal is exposed to increased wear, which ultimately leads to leaks in the gas-hydraulic Can lead to damping element and a reduction in the life performs or makes a maintenance erfoderlich.

Es ist daher die Aufgabe der Erfindung, einen gemäss dem Oberbegriff des Anspruchs 1 ausgebildeten Puffer derart auszugestalten, dass dieser eine erhöhte Lebensdauer aufweist, indem insbesondere die zum Abdichten des Ölraums vorgesehene Dichtung bzw. Dichtungen mechanisch weniger belastet wird/werden. It is therefore the object of the invention to provide a according to the preamble of the claim 1 designed buffer such that this increased life in particular by the seal provided for sealing off the oil space or seals are mechanically less loaded / are.

Diese Aufgabe wird durch einen Puffer gelöst, der die im Kennzeichen des Anspruchs 1 angeführten Merkmale aufweist.This object is achieved by a buffer, which in the characterizing part of claim 1 having listed features.

Durch die beschriebene Ausbildung wird insbesondere vermieden, dass sich das Plungerrohr bei exzentrisch auf den Pufferteller einwirkenden Kräften schräg eingeschoben wird. Dadurch wird die Reibung und Abnutzung zwischen dem in die Pufferhülse eintauchenden Plungerrohr und der Pufferhülse reduziert und insbesondere die Dichtung geschont.By the described training is particularly avoided that the plunger tube with obliquely inserted forces acting eccentrically on the buffer plate becomes. As a result, the friction and wear between the dipping into the buffer sleeve Plunger tube and the buffer sleeve reduces and in particular the seal spared.

Bevorzugte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen 2 bis 8 umschrieben.Preferred embodiments of the invention are described in the dependent claims 2 to 8 circumscribed.

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

  • Fig. 1 einen Längsschnitt durch ein Ausführungsbeispiel eines gas-hydraulischen Puffers im Ruhezustand;
  • Fig. 2 eine Detailansicht des Zwischenelements des Puffers gemäss Fig. 1.
    • The invention will be explained in more detail with reference to drawings. In these drawings shows
  • 1 shows a longitudinal section through an embodiment of a gas-hydraulic buffer in the idle state.
  • 2 shows a detailed view of the intermediate element of the buffer according to FIG. 1.

    • Anhand der Fig. 1 wird der grundsätzliche Aufbau des Puffers erläutert, wobei im wesentlichen nur auf die im Zusammenhang mit der Erfindung relevanten Teile näher eingegangen wird.With reference to FIG. 1, the basic structure of the buffer is explained, wherein substantially only discussed in detail in the context of the invention relevant parts becomes.

    Der Puffer weist eine am Schienenfahrzeug (nicht dargestellt) zu befestigende Pufferhülse 1 sowie einen Stösselanordnung 2 auf. Letztere besteht aus einem äusseren Stösselrohr 3 mit einem daran befestigen Pufferteller 4 sowie einem inneren Plungerrohr 5. Das Plungerrohr 5 ist beidseitig von je einem Flansch 6, 7 verschlossen. 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. Zwischen dem fahrzeugseitigen Ventilflansch 7 und dem fahrzeugseitigen Ende der Pufferhülse 1 wird im Innenraum der Pufferhülse 1 ein Ölraum 9 gebildet. Im hier dargestellten ausgefederten Ruhezustand ist der Gasraum 8 zu einem Teil mit Hydrauliköl gefüllt, währenddem der Ölraum 9 vollständig mit Hydrauliköl gefüllt ist. Der fahrzeugseitige Ventilflansch 7 bildet zusammen mit einer darin aufgenommenen Ventilanordnung 13 eine gas-hydraulische Regeleinrichtung 12, welche die Stösselanordnung 2 in der hier dargestellten Ruhestellung zu halten bestrebt ist. Zudem wird durch die gas-hydraulische Regeleinrichtung 12 bei auf den Pufferteller 4 einwirkenden Stosskräften der Durchfluss zwischen dem Ölraum 9 und dem Gasraum 8 in Abhängigkeit der einwirkenden Kräfte geregelt. Da die grundsätzliche Wirkungsweise der Regeleinrichtung 12 bekannt ist, wird nicht näher darauf eingegangen.The buffer has a buffer sleeve (not shown) to be fastened to the rail vehicle 1 and a plunger assembly 2. The latter consists of an outer one Pusher tube 3 with an attached buffer pad 4 and an inner plunger tube 5. The plunger tube 5 is closed on both sides by a respective flange 6, 7. In his Interior forms the plunger tube 5 a gas chamber 8 for receiving a below an overpressure of about 10-20 bar standing gas and a subset of Hydraulic medium. Between the vehicle-side valve flange 7 and the vehicle-side End of the buffer sleeve 1, an oil chamber 9 is formed in the interior of the buffer sleeve 1. In the rebounded state shown here, the gas space 8 to a Part filled with hydraulic oil while the oil chamber 9 is completely filled with hydraulic oil is. The vehicle-side valve flange 7 forms together with a recorded therein Valve assembly 13, a gas-hydraulic control device 12, which the plunger assembly 2 endeavor to keep in the rest position shown here. moreover is acted upon by the gas-hydraulic control device 12 on the buffer plate 4 Shock forces the flow between the oil chamber 9 and the gas space 8 in Controlled dependence of the acting forces. Because the basic mode of action the control device 12 is known, will not be discussed in detail.

    An den dem Pufferteller 4 zugewandten Flansch 6 des Plungerrohrs 5 schliesst sich eine Scheibe 10 an. Zwischen dieser Scheibe 10 und der Rückseite 4a des Puffertellers 4 ist ein scheibenförmiges Zwischenelement 15 eingefügt. Dieses weist auf der dem Pufferteller 4 zugewandten Seite eine kalottenförmig gestaltete Oberfläche 16 auf, welche sich an einer korrespondierend gestalteten, in die Rückseite 4a des Puffertellers 4 eingelassenen Ausnehmung 17 abstützt. Die kalottenförmig gestaltete Ausnehmung 17 im Pufferteller 4 ist dabei so gestaltet, dass deren virtuelles Zentrum in etwa durch den sich auf der Längsmittelachse 22 der Pufferhülse 1 befindlichen Schwerpunkt des Plungerrohrs 5 verläuft. Die der Scheibe 10 zugewandte Seite des Zwischenelements 15 ist flach. Während sowohl der Pufferteller 4 wie auch die Scheibe 10 aus Metall bestehen, ist das Zwischenelement 15 aus einem Kunststoff mit guten Gleiteigenschaften gefer tigt. Als Werkstoff für das Zwischenelement 15 kommen beispielsweise Polyamide, PTFE, PVC, Polyethen, Polycarbonate oder Polyacetale, ggf. mit Füllstoffen wie Graphit oder Glasfasern in Frage. Das Zwischenelement 15 ist mit einer radial umlaufenden Nut 18 versehen, in welcher ein dem Fixieren des Zwischenelements 15 dienender Draht 19 aufgenommen ist, welcher jedoch nur ansatzweise dargestellt ist. Dieser Draht 19 ist auf der Oberseite des Zwischenelements 15 mittels eines Bügels 20 derart an der Scheibe 10 befestigt, dass sich das Zwischenelement 15 in radialer Richtung relativ zur Scheibe 10 wie auch zum Pufferteller 4 bewegen kann. Dieser Draht 19 dient in erster Linie als Montagehilfe, mittels welcher das Zwischenelement 15 an der Scheibe 10 und damit am Plungerrohr 5 fixiert wird. Im weiteren dient der Bügel 20 auch als Positionierhilfe, welche die Winkellage des Plungerrohrs 5 um die Längsmittelachse 22 in Relation zum Pufferteller 4 und damit zum gesamten Puffer festlegt. Zur Führung des Stösselrohrs 3 sind zwei die Pufferülse 1 am Umfang umschlingende Kunststoffbänder 27 vorgesehen, welche eine Art Gleitlager für das Stösselrohr 3 bilden. Bei einer exzentrisch auf den Pufferteller 4 einwirkenden Stosskraft besteht die Gefahr, dass sich das Stösselrohr 3 beim Einschieben leicht verkantet, da der Pufferteller fest mit dem Stösselrohr 3 verbunden ist und zwischen den Kunststoffbändern 27 und der Innenseite des Stösselrohrs 3 ein gewisses Spiel besteht und die Kunststoffbänder 27 darüberhinaus auch nachgiebig sind. Im Gegensatz dazu wird das Plungerrohr 5 weitgehend parallel zur Längsmittelachse 22 des Stösselrohrs eingeschoben, da eine exzentrische Auslenkung des Puffertellers 4 von dem "schwimmend" zwischen dem Pufferteller 4 und der Scheibe 10 gelagerten Zwischenelement 15 aufgenommen wird indem es sich gegenüber dem Pufferteller 4 in radialer Richtung selbsttätig zentriert. Damit werden radiale Auslenkungen des Puffertellers 4 vom Zwischenelement 15 weitgehend kompensiert werden; d.h es werden keine Querkomponenten und keine Drehmomente vom Pufferteller 4 auf das Plungerrohr 5 übertragen sondern lediglich achsiale Kräfte, so dass das Plungerrohr 5 immer parallel zur Längsmittelachse 22 der Pufferülse 1 verschoben wird. Indem sich also das Zwischenelement 15 in radialer Richtung relativ zum Pufferteller 4 und zur Scheibe 10 verschieben kann und auf der dem Pufferteller 4 zugewandten Seite eine kalottenförmig gestaltete Oberfläche 16 aufweist, welche sich in einer korrespondierend gestalteten, in die Rückseite 4a des Puffertellers 4 eingelassenen Ausnehmung 17 abstützt, kann sichergestellt werden, dass auch bei exzentrisch auf den Pufferteller 4 einwirkenden Kräften die Kraftübertragung vom Pufferteller 4 auf das Plungerrohr 5 zentrisch erfolgt und sich das Plungerrohr 5 auch bei exzentrisch auf den Pufferteller 4 einwirkenden Stösskräften nicht verkantet, sondern im wesentlichen immer parallel zur Längsmittelachse 22 der Pufferhülse 1 ausgerichtet ist. Dadurch wird insbesondere auch die Lebensdauer der Dichtung 14 erhöht.At the buffer plate 4 facing flange 6 of the plunger tube 5 closes a disc 10 at. Between this disc 10 and the back 4a of the buffer plate 4, a disk-shaped intermediate element 15 is inserted. This points to the the Buffer plate 4 side facing a dome-shaped surface 16, which on a correspondingly shaped, in the back 4a of the buffer plate. 4 recessed recess 17 is supported. The dome-shaped recess 17 in the buffer plate 4 is designed so that its virtual center approximately by the located on the longitudinal center axis 22 of the buffer sleeve 1 center of gravity of the plunger tube 5 runs. The disc 10 facing side of the intermediate element 15 is flat. While both the buffer plate 4 and the disc 10 are made of metal, the intermediate element 15 is made of a plastic with good sliding properties Untitled. As a material for the intermediate element 15 are, for example, polyamides, PTFE, PVC, polyethene, polycarbonates or polyacetals, possibly with fillers such as graphite or glass fibers in question. The intermediate element 15 is provided with a radially circumferential groove 18, in which a fixing of the intermediate member 15 serving wire 19th is included, which is only partially shown. This wire 19 is on the upper side of the intermediate element 15 by means of a bracket 20 on the Washer 10 attached, that the intermediate element 15 in the radial direction relative to Disc 10 as well as the buffer plate 4 can move. This wire 19 is used first Line as an assembly aid, by means of which the intermediate element 15 on the disc 10 and so that it is fixed to the plunger tube 5. Furthermore, the bracket 20 also serves as a positioning aid, which the angular position of the plunger tube 5 about the longitudinal central axis 22 in relation to the buffer plate 4 and thus determines the entire buffer. For guiding the ram pipe 3 are two the buffer sleeve 1 wrapped around the circumference plastic bands 27, which form a kind of plain bearing for the ram pipe 3. At an eccentric On the buffer plate 4 acting impact force there is a risk that the ram pipe 3 slightly tilted when inserting, as the buffer plate fixed to the ram pipe 3 is connected and between the plastic bands 27 and the inside of the ram tube 3 is a certain game and the plastic straps 27 also also are yielding. In contrast, the plunger tube 5 is largely parallel to Inserted longitudinal center axis 22 of the ram tube, as an eccentric deflection the buffer plate 4 of the "floating" between the buffer plate 4 and the Washer 10 mounted intermediate member 15 is received by facing each other the buffer plate 4 automatically centered in the radial direction. This will be radial Deflections of the buffer plate 4 from the intermediate element 15 largely compensated become; that is, there are no cross components and no torques from the buffer plate 4 transmitted to the plunger tube 5 but only axial forces, so that the Plunger tube 5 is always moved parallel to the longitudinal central axis 22 of the buffer sleeve 1. Thus, by the intermediate element 15 in the radial direction relative to the buffer plate. 4 and can move to the disc 10 and on the buffer plate 4 facing Side has a dome-shaped surface 16, which in a corresponding designed, in the back 4a of the buffer plate 4 recessed recess 17 can be ensured that even when eccentric on the Buffer plate 4 acting forces the power transmission from the buffer plate 4 on the Plunger tube 5 is centered and the plunger tube 5 even when eccentric on the Buffer plate 4 acting shock forces not tilted, but essentially always is aligned parallel to the longitudinal central axis 22 of the buffer sleeve 1. This will in particular, the life of the seal 14 is increased.

    In der Fig. 2 ist das am Plungerrohr 5 fixierte Zwischenelement 15 in einer perspektivischen Ansicht dargestellt. Aus dieser Darstellung ist insbesondere der Draht 19 ersichtlich, mittels welchem das Zwischenelement 15 fixiert ist. Zur besseren Übersicht ist die Stirnseite des Zwischenelements 15 mit einer Schraffur 24 und diejenige der Scheibe 10 mit einer Schraffur 25 versehen. Der Draht ist dabei soweit gespannt, dass er einer seits das Zwischenelement 15 sicher hält, andererseits jedoch eine Relativbewegung des Zwischenelements 15 in einer parallel zur Stirnfläche der Scheibe 10 liegenden Ebene ermöglicht. Die soll auch durch die Pfeile P zum Ausdruck gebracht werden. Im weiteren ist eine Schraube 21 ersichtlich, mittels welcher der Draht 19 am Bügel 20 fixiert ist.In FIG. 2, the intermediate element 15 fixed to the plunger tube 5 is in a perspective view View shown. From this representation, in particular the wire 19 can be seen, by means of which the intermediate element 15 is fixed. For a better overview is the Front side of the intermediate element 15 with a hatching 24 and that of the disc 10 provided with a hatching 25. The wire is stretched so far that he is one On the other hand, the intermediate element 15 holds securely, on the other hand, however, a relative movement of the intermediate element 15 in a direction parallel to the end face of the disc 10 Level allows. This should also be expressed by the arrows P. in the Further, a screw 21 can be seen, by means of which the wire 19 is fixed to the bracket 20 is.

    Claims (8)

    1. Buffer for rail vehicles, having a buffer sleeve (1) which is to be fixed to the vehicle and a pneumatically damped plunger arrangement (2) which can be displaced relative to the said buffer sleeve (1) and has a buffer plate (4) and a plunger tube (5) which is guided in the buffer sleeve (1), characterized in that a radially displaceable intermediate element (15) is arranged between the buffer plate (4) and the plunger tube (5), the said intermediate element (15) being mounted in a floating manner and transmitting forces which act eccentrically on the buffer plate (4) onto the plunger tube (5) in a largely centred manner.
    2. Buffer according to Claim 1, characterized in that, on the side facing the buffer plate (4), the intermediate element (15) has a cap-shaped surface (16) which is supported in a correspondingly formed recess (17) in the buffer plate (4).
    3. Buffer according to Claim 1 or 2, characterized in that the cap-shaped recess (17) in the buffer plate (4) is formed in such a way that its virtual centre runs at least approximately through the centre of gravity of the plunger tube (5).
    4. Buffer according to one of the preceding claims, characterized in that the plunger tube (5) is provided at its end with a disc (10) facing the intermediate element (15), the intermediate element (15) being supported on the said disc (10), both the buffer plate (4) and the disc (10) consisting of metal and the intermediate element (15) being manufactured from a plastic having good sliding properties.
    5. Buffer according to one of the preceding claims, characterized in that the intermediate element (15) is fixed directly or indirectly to the plunger tube (5) by means of a wire (19) which at least partially wraps around its circumference.
    6. Buffer according to Claim 5, characterized in that the intermediate element (15) has a circumferential groove (18) in which the wire (19) is accommodated.
    7. Buffer according to one of the preceding claims, characterized in that the plunger arrangement (2) has an outer plunger tube (3) which at least partially encloses the buffer sleeve (1) on the outside.
    8. Buffer according to one of the preceding claims, characterized in that an oil space (9) is arranged in the buffer sleeve (1), which oil space (9) is filled with a hydraulic medium and becomes smaller as the plunger tube (5) is pushed in increasingly, and in that the buffer sleeve (1) is provided with a groove (11) in which at least one seal (14) which encloses the outside of the plunger tube (5) is arranged.
    EP02405589A 2001-08-10 2002-07-11 Buffer for railway vehicles Expired - Lifetime EP1283142B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    CH14752001 2001-08-10
    CH14752001 2001-08-10

    Publications (2)

    Publication Number Publication Date
    EP1283142A1 EP1283142A1 (en) 2003-02-12
    EP1283142B1 true EP1283142B1 (en) 2005-06-08

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    ID=4565509

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP02405589A Expired - Lifetime EP1283142B1 (en) 2001-08-10 2002-07-11 Buffer for railway vehicles

    Country Status (5)

    Country Link
    EP (1) EP1283142B1 (en)
    AT (1) ATE297335T1 (en)
    DE (1) DE50203315D1 (en)
    ES (1) ES2243680T3 (en)
    PL (1) PL199059B1 (en)

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1283143A1 (en) * 2001-08-10 2003-02-12 Schwab Verkehrstechnik AG Gas-hydraulic damping device

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE703842C (en) * 1936-12-19 1941-03-17 Gisbert Boellhoff Buffers for small rail vehicles, especially mine carts
    DE1067051B (en) * 1955-02-05
    BE558262A (en) * 1956-06-11
    DE19728421A1 (en) * 1997-07-03 1999-01-07 Stefan Singer Telescopic buffer for rail vehicles

    Also Published As

    Publication number Publication date
    PL355254A1 (en) 2003-02-24
    ATE297335T1 (en) 2005-06-15
    DE50203315D1 (en) 2005-07-14
    EP1283142A1 (en) 2003-02-12
    ES2243680T3 (en) 2005-12-01
    PL199059B1 (en) 2008-08-29

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