EP1800988A1 - Buffer for railway vehicles and method for manufacture of the buffer - Google Patents

Buffer for railway vehicles and method for manufacture of the buffer Download PDF

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Publication number
EP1800988A1
EP1800988A1 EP06405447A EP06405447A EP1800988A1 EP 1800988 A1 EP1800988 A1 EP 1800988A1 EP 06405447 A EP06405447 A EP 06405447A EP 06405447 A EP06405447 A EP 06405447A EP 1800988 A1 EP1800988 A1 EP 1800988A1
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EP
European Patent Office
Prior art keywords
buffer
recess
buffer plate
head
plate
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Granted
Application number
EP06405447A
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German (de)
French (fr)
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EP1800988B1 (en
Inventor
Otto Ziegler
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Schwab Verkehrstechnik AG
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Schwab Verkehrstechnik AG
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Publication of EP1800988A1 publication Critical patent/EP1800988A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G11/00—Buffers
    • B61G11/18—Details

Definitions

  • the invention relates to a buffer for rail vehicles according to the preamble of claim 1 and a method for producing the buffer according to the preamble of claim 7.
  • buffers are increasingly used with a plastic impact surface.
  • the buffer head is usually provided with a recess in which a plastic buffer plate is received and fixed.
  • the buffer head is occupied to form a shock surface with an inner part made of plastic and an outer part made of steel.
  • the outer part is provided with a conically widening in the direction of the buffer head bore. In this hole, the provided with a corresponding edge inner part is held.
  • the outer part is attached to the buffer head with the help of rivets.
  • a buffer for rail vehicles in which the buffer plate is provided with a recess in which a plastic buffer plate is received.
  • the buffer plate is elastically deformed by compressive load and then fixed along its circumference in the deformed position by means of a first sleeve.
  • the first sleeve is placed and aligned on the recess of the buffer plate, so that the buffer plate can be pressed into the recess.
  • the buffer plate relaxes by utilizing its material elasticity, so that it is then fixed in a form-fitting manner along the edge in the recess.
  • the respective recess in the buffer plate has a smooth bottom and the buffer plate is neither by mechanical Fixing means still fixed by gluing at the bottom of the recess.
  • the buffer plate is damaged when exposed to lateral impact forces, such as those that can occur when passing through tight bends.
  • lateral impact forces such as those that can occur when passing through tight bends.
  • the side edge of a buffer head acts on the buffer plate of the counter-buffer in such a way that the buffer plate begins to bulge and thereby kinked, sheared or completely pushed out of the recess. This is due primarily to the fact that the back of the respective buffer plate is fixed only by clamping in the recess and there is no positive or non-positive connection with the bottom of the recess.
  • the buffer head is provided with a round opening, which widens conically towards the buffer head.
  • the opening is embedded in a head part, which is fastened by means of rivets on the actual buffer head.
  • the buffer plate is inserted in this case from behind into the head part and the head part is then fastened by means of the rivets on the buffer head.
  • the opening is recessed directly into the buffer head.
  • a fastening tool is provided, by means of which the buffer plate is deflected so far that it can be inserted into the opening. After removal of the fastening tool, the buffer plate relaxes, whereby she fixes herself in the opening.
  • an adhesive bond can be provided for fastening the buffer plate in the recess.
  • the buffer plate can also be poured into the recess, in which case the recess can be provided with projections or recesses to form a toothing with the cast-in buffer plate.
  • the invention aims to develop a buffer for rail vehicles such that a buffer plate made of plastic can be fixed in a recess of the buffer head, that the risk of damaging the buffer plate is largely eliminated even when exposed to lateral forces, the manufacturing cost of the buffer should not be increased significantly.
  • a buffer according to claim 1 is provided according to the invention.
  • a method for producing the buffer is given in claim 7.
  • the basic idea of the invention is to provide the bottom of the recess with elevations and / or depressions, which produce a positive and non-positive connection with the substantially smooth back of the buffer plate in the load case. Since the existing of a plastic such as polyamide buffer plate compared to the usual steel buffer head is comparatively soft and resilient, the buffer plate is under the action of impact forces, even if they have a large lateral component, against said elevations and / or pressed into the wells.
  • the surface of the buffer plate conforms to the structure of the elevations and / or depressions, so that a positive and non-positive connection between the bottom of the buffer head and the buffer plate is effected, which ensures that the buffer plate is not laterally under the action of lateral forces can shift appreciably and does not begin to bulge appreciably and thus ultimately will not be damaged.
  • a method for producing a buffer head is also specified, in which the recess is provided with a surface enlarging structure. Preferred developments of the method are specified in the dependent claims 8 to 10.
  • FIG. 1 shows a cross-section of a buffer head formed according to the prior art.
  • the buffer head forms part of a buffer for rail vehicles, as for example from the EP-A-1 083 105 is known. Since the basic structure of such buffers is known, essentially only addresses the essential features of the invention in connection with the buffer.
  • the buffer head 10 also called buffer plate, consists essentially of a plate 11 which is provided on the side facing away from the rail vehicle with a recess 12 for receiving a buffer plate made of plastic.
  • the recess 12 is, seen in cross-section, designed substantially dovetail-shaped. In this recess 12 which can not be seen from this illustration, the buffer plate can be fixed by clamping.
  • Buffer or buffer heads 10 have proven very successful in practice with such buffer plates, it may happen in individual cases that the buffer plate is so heavily loaded by the counter buffer, namely by the edge of the buffer head of the counter buffer when driving through a curve, ie in the transverse direction in that the buffer plate begins to bulge and thereby kinked, sheared or pushed out of the recess.
  • Fig. 2 shows a inventively designed buffer head 1 in longitudinal section.
  • the bottom 4 of the recessed into the buffer head 1 and the base plate 2 recess 3 is provided with a plurality of groove-shaped recess 5.
  • FIG. 3 shows the buffer head 1 according to FIG. 2 with the buffer plate 6 inserted into the recess.
  • the buffer plate 6 can be produced, for example, from polyamide and is preferably made according to the method described in US Pat EP-A-1 354 778 described method used in the recess.
  • the groove-shaped depressions 5 are intended to ensure that, in the case of loading, a positive and non-positive connection is produced between the back 7 of the buffer plate 6 and the bottom 4 of the recess 3 (FIG. 2), by the buffer plate 6 being pushed against the groove-shaped depressions 5 by the counter buffer or against which the groove-shaped recesses 5 delimiting surveys is pressed, whereby the buffer plate clawed by their material elastic resilience quasi in these grooves, so that they can not be moved laterally.
  • the previously described danger of bulging and a concomitant kinking, shearing, or squeezing the buffer plate 6 is eliminated.
  • FIG. 4 shows a plan view of the buffer head 1 according to FIG. 2.
  • the recess 3 is round.
  • the recessed in the bottom 4 of the recess 3 groove-shaped recesses 5 are shown in a schematic representation, in which case only a spiral-shaped groove is shown with exaggerated size shown slope.
  • the buffer head 1 has a greater width than height.
  • a horizontally extending in the transverse direction through the center of the buffer plate 2 is designated H.
  • the lathe machining tool centers in the center 4 of the recess 3 in the bottom 4 and is then moved radially outwards, while the buffer head 1 rotates in relation to the machining tool.
  • the groove can also be made in reverse by moving the machining tool from the outside inwards.
  • the groove produced in this way preferably has a depth between 1 and 2 mm and a pitch of 1 to 3 mm.
  • the attachment of a spiral groove 5 at the bottom 4 of the recess 3 is quick, easy and inexpensive to accomplish, especially since the shape of the buffer head 1 already takes place on a lathe. It is understood that instead of a spiral groove 5, of course, other forms of elevations and / or depressions can be provided.
  • the bottom 4 of the recess 3 can also be provided by laser processing, forging, erosion or by embossing with depressions, which form a surface enlarging structure.
  • the basic shape of the buffer head can also be produced in other ways, for example by forging, casting or by bending.
  • depressions for example, elevations could also be provided, which are produced, for example, during casting.
  • such a structure has the advantage that no additional connection, for example in the form of screws or an adhesive bond between the buffer plate and the buffer head must be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Body Structure For Vehicles (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • Small-Scale Networks (AREA)

Abstract

The buffer for rail vehicles includes a buffer plate (6) of plastic which is housed and fixed in a buffer head (1), wherein the buffer plate has a basically smooth surface on the rear side which faces the base of a recess (3) in the buffer head, while the base of the recess has projections and/or indentations (5) which may be in groove form and recessed into the base in helical fashion. An independent claim is included for a method for producing a buffer for rail vehicles in which the base of the recess in the buffer head is provided with indentations and/or projections by means of a cutting process, by laser machining, forging, eroding, embossing or casting.

Description

Die Erfindung betrifft einen Puffer für Schienenfahrzeuge nach dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zum Herstellen des Puffers gemäss dem Oberbegriff des Anspruchs 7.The invention relates to a buffer for rail vehicles according to the preamble of claim 1 and a method for producing the buffer according to the preamble of claim 7.

Um die Reibkräfte zwischen den Puffern von Schienenfahrzeugen im Schiebebetrieb oder beim Bremsen zu reduzieren, kommen vermehrt Puffer mit einer aus Kunststoff bestehenden Stossfläche zum Einsatz. Dazu ist der Pufferkopf üblicherweise mit einer Ausnehmung versehen, in der eine aus Kunststoff bestehende Pufferplatte aufgenommen und fixiert ist.In order to reduce the frictional forces between the buffers of rail vehicles during coasting or braking, buffers are increasingly used with a plastic impact surface. For this purpose, the buffer head is usually provided with a recess in which a plastic buffer plate is received and fixed.

Aus der CH 370 109 ein Puffer für Schienenfahrzeuge bekannt, dessen Pufferkopf zur Bildung einer Stossfläche mit einem inneren Teil aus Kunststoff und einem äusseren Teil aus Stahl belegt ist. Der äussere Teil ist mit einer sich in Richtung des Pufferkopfs konisch erweiternden Bohrung versehen. In dieser Bohrung ist der mit einem korrespondierenden Rand versehene innere Teil gehalten. Der äussere Teil ist mit Hilfe von Nieten am Pufferkopf befestigt.From the CH 370 109 a buffer for rail vehicles is known, the buffer head is occupied to form a shock surface with an inner part made of plastic and an outer part made of steel. The outer part is provided with a conically widening in the direction of the buffer head bore. In this hole, the provided with a corresponding edge inner part is held. The outer part is attached to the buffer head with the help of rivets.

In der EP-A-1 354 778 ist ein Puffer für Schienenfahrzeuge beschrieben, bei dem der Pufferteller mit einer Ausnehmung versehen ist, in der eine aus Kunststoff bestehende Pufferplatte aufgenommen ist. Um die Pufferplatte in die Ausnehmung einsetzen zu können, wird die Pufferplatte durch Druckbelastung elastisch deformiert und danach entlang ihres Umfangs in der deformierten Lage mittels einer ersten Hülse fixiert. Anschliessend wird die erste Hülse auf die Ausnehmung des Puffertellers aufgesetzt und ausgerichtet, so dass die Pufferplatte in die Ausnehmung hineingedrückt werden kann. Anschliessend entspannt sich die Pufferplatte unter Ausnutzung ihrer Materialelastizität, so dass sie danach formschlüssig entlang des Randes in der Ausnehmung fixiert ist.In the EP-A-1 354 778 a buffer for rail vehicles is described in which the buffer plate is provided with a recess in which a plastic buffer plate is received. In order to use the buffer plate in the recess, the buffer plate is elastically deformed by compressive load and then fixed along its circumference in the deformed position by means of a first sleeve. Subsequently, the first sleeve is placed and aligned on the recess of the buffer plate, so that the buffer plate can be pressed into the recess. Subsequently, the buffer plate relaxes by utilizing its material elasticity, so that it is then fixed in a form-fitting manner along the edge in the recess.

Bei den genannten Ausführungsbeispielen besitzt die jeweilige Ausnehmung im Pufferteller einen glatten Boden und die Pufferplatte ist weder durch mechanische Befestigungsmittel noch durch Kleben am Boden der Ausnehmung fixiert. Dadurch besteht die Gefahr, dass die Pufferplatte beim Einwirken von seitlichen Stosskräften, wie sie beispielsweise beim Durchfahren von engen Kurven auftreten können, beschädigt wird. Beim Durchfahren von engen Kurven kann es vorkommen, dass die Seitenkante des einen Pufferkopfs derart auf die Pufferplatte des Gegenpuffers einwirkt, dass sich die Pufferplatte aufzuwölben beginnt und dabei abgeknickt, abgeschert oder ganz aus der Ausnehmung herausgedrückt wird. Dies rührt in erster Linie daher, dass die Rückseite der jeweiligen Pufferplatte nur klemmend in der Ausnehmung fixiert ist und weder eine form- noch kraftschlüssige Verbindung mit dem Boden der Ausnehmung besteht.In the aforementioned embodiments, the respective recess in the buffer plate has a smooth bottom and the buffer plate is neither by mechanical Fixing means still fixed by gluing at the bottom of the recess. As a result, there is a risk that the buffer plate is damaged when exposed to lateral impact forces, such as those that can occur when passing through tight bends. When driving through tight curves, it may happen that the side edge of a buffer head acts on the buffer plate of the counter-buffer in such a way that the buffer plate begins to bulge and thereby kinked, sheared or completely pushed out of the recess. This is due primarily to the fact that the back of the respective buffer plate is fixed only by clamping in the recess and there is no positive or non-positive connection with the bottom of the recess.

Um diesem Problem abzuhelfen würde es nahe liegen, die Pufferplatte entweder durch mechanische Befestigungsmittel oder durch Kleben zusätzlich in der Ausnehmung zu fixieren. Das Anbringen von mechanischen Befestigungsmitteln wie beispielsweise Schrauben ist jedoch mit Nachteilen verbunden, da dies die Herstellungskosten des Puffers erhöhen würde und die Stossfläche der Pufferplatte zudem mit unerwünschten Öffnungen versehen werden müsste. Andererseits ist das Verkleben einer aus Polyamid bestehenden Pufferplatte mit einem aus Stahl bestehenden Pufferteller aufgrund der unterschiedlichen Materialeigenschaften und insbesondere der unterschiedlichen Ausdehnungskoeffizienten mit Schwierigkeiten verbunden.To remedy this problem, it would be obvious to fix the buffer plate in the recess either by mechanical fastening means or by gluing. However, the attachment of mechanical fasteners such as screws is associated with disadvantages, as this would increase the manufacturing cost of the buffer and the impact surface of the buffer plate would also have to be provided with unwanted openings. On the other hand, the bonding of a polyamide buffer plate is connected to a steel buffer plate due to the different material properties and in particular the different expansion coefficients with difficulty.

Schliesslich ist aus der GB 809 137 ein Eisenbahnpuffer bekannt, dessen Pufferkopf mit einer runden Öffnung versehen ist, welche sich in Richtung des Pufferkopfs konisch erweitert. Bei einem ersten Ausführungsbeispiel ist die Öffnung in ein Kopfteil eingelassen, welches mittels Nieten am eigentlichen Pufferkopf befestigt wird. Die Pufferplatte wird in diesem Fall von hinten in den Kopfteil eingesetzt und der Kopfteil danach mittels der Nieten am Pufferkopf befestigt. Bei einem anderen Ausführungsbeispiel ist die Öffnung direkt in den Pufferkopf eingelassen. In diesem Fall ist ein Befestigungswerkzeug vorgesehen, mittels welchem die Pufferplatte soweit durchgebogen wird, dass sie in die Öffnung eingesetzt werden kann. Nach dem Entfernen des Befestigungswerkzeugs entspannt sich die Pufferplatte, wodurch sie sich in der Öffnung fixiert. Zudem wird erwähnt, dass zur Befestigung der Pufferplatte in der Ausnehmung eine Klebverbindung vorgesehen werden kann. Alternativ dazu kann die Pufferplatte auch in die Ausnehmung eingegossen werden, wobei in diesem Fall die Ausnehmung mit Vorsprüngen oder Ausnehmungen zur Bildung einer Verzahnung mit der eingegossenen Pufferplatte versehen werden kann.Finally is from the GB 809 137 a railway buffer known, the buffer head is provided with a round opening, which widens conically towards the buffer head. In a first embodiment, the opening is embedded in a head part, which is fastened by means of rivets on the actual buffer head. The buffer plate is inserted in this case from behind into the head part and the head part is then fastened by means of the rivets on the buffer head. In another embodiment, the opening is recessed directly into the buffer head. In this case, a fastening tool is provided, by means of which the buffer plate is deflected so far that it can be inserted into the opening. After removal of the fastening tool, the buffer plate relaxes, whereby she fixes herself in the opening. In addition, it is mentioned that an adhesive bond can be provided for fastening the buffer plate in the recess. Alternatively, the buffer plate can also be poured into the recess, in which case the recess can be provided with projections or recesses to form a toothing with the cast-in buffer plate.

Die Erfindung zielt darauf ab, einen Puffer für Schienenfahrzeuge derart weiterzubilden, dass eine aus Kunststoff bestehende Pufferplatte derart in einer Ausnehmung des Pufferkopfs fixiert werden kann, dass die Gefahr einer Beschädigung der Pufferplatte auch beim Einwirken von Seitenkräften weitestgehend eliminiert wird, wobei die Herstellungskosten des Puffers nicht nennenswert erhöht werden sollen.The invention aims to develop a buffer for rail vehicles such that a buffer plate made of plastic can be fixed in a recess of the buffer head, that the risk of damaging the buffer plate is largely eliminated even when exposed to lateral forces, the manufacturing cost of the buffer should not be increased significantly.

Hierzu wird nach der Erfindung ein Puffer gemäss dem Anspruch 1 bereitgestellt. Ein Verfahren zum Herstellen des Puffers ist im Anspruch 7 angegeben.For this purpose, a buffer according to claim 1 is provided according to the invention. A method for producing the buffer is given in claim 7.

Der grundsätzliche Erfindungsgedanke besteht darin, den Boden der Ausnehmung mit Erhebungen und/oder Vertiefungen zu versehen, welche im Belastungsfall eine form- und kraftschlüssige Verbindung mit der im wesentlichen glatten Rückseite der Pufferplatte herstellen. Da die aus einem Kunststoff wie beispielsweise Polyamid bestehende Pufferplatte im Vergleich zu dem üblicherweise aus Stahl bestehenden Pufferkopf vergleichsweise weich und elastisch nachgiebig ist, wird die Pufferplatte beim Einwirken von Stosskräften, auch wenn diese eine grosse seitliche Komponente aufweisen, gegen die genannten Erhebungen und/oder in die Vertiefungen gedrückt. Dabei passt sich die Oberfläche der Pufferplatte der Struktur der Erhebungen und/oder Vertiefungen an, so dass eine form- und kraftschlüssige Verbindung zwischen dem Boden des Pufferkopfs und der Pufferplatte bewirkt wird, welche sicherstellt, dass sich die Pufferplatte auch beim Einwirken von Seitenkräften seitlich nicht nennenswert verschieben kann und sich nicht nennenswert aufzuwölben beginnt und damit letztlich auch nicht beschädigt wird.The basic idea of the invention is to provide the bottom of the recess with elevations and / or depressions, which produce a positive and non-positive connection with the substantially smooth back of the buffer plate in the load case. Since the existing of a plastic such as polyamide buffer plate compared to the usual steel buffer head is comparatively soft and resilient, the buffer plate is under the action of impact forces, even if they have a large lateral component, against said elevations and / or pressed into the wells. In this case, the surface of the buffer plate conforms to the structure of the elevations and / or depressions, so that a positive and non-positive connection between the bottom of the buffer head and the buffer plate is effected, which ensures that the buffer plate is not laterally under the action of lateral forces can shift appreciably and does not begin to bulge appreciably and thus ultimately will not be damaged.

Vorteilhafte Weiterbildungen des Puffers sind in den abhängigen Ansprüchen 2 bis 6 definiert.Advantageous developments of the buffer are defined in the dependent claims 2 to 6.

Im Anspruch 7 wird zudem ein Verfahren zum Herstellen eines Pufferkopfs angegeben, bei dem die Ausnehmung mit einer die Oberfläche vergrössernden Struktur versehen ist. Bevorzugte Weiterbildungen des Verfahrens sind in den abhängigen Ansprüchen 8 bis 10 angegeben.In claim 7, a method for producing a buffer head is also specified, in which the recess is provided with a surface enlarging structure. Preferred developments of the method are specified in the dependent claims 8 to 10.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. In dieser Zeichnung zeigt:

  • Fig. 1 einen nach dem Stand der Technik ausgebildeten Pufferkopf im Querschnitt,
  • Fig. 2 einen erfindungsgemäss gestalteten Pufferkopf im Querschnitt,
  • Fig. 3 den Pufferkopf gemäss Fig. 2 mit eingesetzter Pufferplatte, und
  • Fig. 4 eine Draufsicht auf den Pufferkopf gemäss Fig. 2.
An embodiment of the invention will be explained in more detail with reference to a drawing. In this drawing shows:
  • 1 a formed according to the prior art buffer head in cross section,
  • 2 shows a buffer head designed according to the invention in cross section,
  • Fig. 3 shows the buffer head of FIG. 2 with inserted buffer plate, and
  • 4 is a plan view of the buffer head according to FIG. 2.

Die Figur 1 zeigt einen nach dem Stand der Technik ausgebildeten Pufferkopf im Querschnitt. Der Pufferkopf bildet einen Bestandteil eines Puffers für Schienenfahrzeuge, wie er beispielsweise aus der EP-A-1 083 105 bekannt ist. Da der grundsätzliche Aufbau solcher Puffer bekannt ist, wird im wesentlichen nur auf die im Zusammenhang mit der Erfindung wesentlichen Merkmale des Puffers eingegangen.FIG. 1 shows a cross-section of a buffer head formed according to the prior art. The buffer head forms part of a buffer for rail vehicles, as for example from the EP-A-1 083 105 is known. Since the basic structure of such buffers is known, essentially only addresses the essential features of the invention in connection with the buffer.

Der Pufferkopf 10, auch Pufferteller genannt, besteht im wesentlichen aus einer Platte 11, die auf der dem Schienenfahrzeug abgewandten Seite mit einer Ausnehmung 12 zur Aufnahme einer aus Kunststoff bestehenden Pufferplatte versehen ist. Die Ausnehmung 12 ist, im Querschnitt gesehen, im wesentlichen schwalbenschwanzförmig gestaltet. In dieser Ausnehmung 12 kann die aus dieser Darstellung nicht ersichtliche Pufferplatte klemmend fixiert werden. Obwohl sich Puffer bzw. Pufferköpfe 10 mit derartigen Pufferplatten in der Praxis sehr bewährt haben, kann es in Einzelfällen vorkommen, dass die Pufferplatte durch den Gegenpuffer, namentlich durch die Kante des Pufferkopfs des Gegenpuffers, beim Durchfahren einer Kurve seitwärts, d.h. in Querrrichtung derart stark belastet wird, dass sich die Pufferplatte aufzuwölben beginnt und dadurch abgeknickt, abgeschert oder aus der Ausnehmung herausgedrückt wird. Dies rührt in erster Linie daher, dass die Rückseite der Pufferplatte weder form- noch kraftschlüssig mit dem Boden 13 der Ausnehmung 12 verbunden ist. Eine solche Belastung tritt insbesondere in engen Kurven auf, wenn die Kante des einen Pufferkopfs auf die Pufferplatte des Gegenpuffers einwirkt, da in diesem Fall die genannte Pufferplatte nicht nur in axialer Richtung, sondern insbesondere auch seitlich belastet wird. Von den einwirkenden Seitenkräften geht daher die grösste Beschädigungsgefahr für die Pufferplatte aus.The buffer head 10, also called buffer plate, consists essentially of a plate 11 which is provided on the side facing away from the rail vehicle with a recess 12 for receiving a buffer plate made of plastic. The recess 12 is, seen in cross-section, designed substantially dovetail-shaped. In this recess 12 which can not be seen from this illustration, the buffer plate can be fixed by clamping. Although himself Buffer or buffer heads 10 have proven very successful in practice with such buffer plates, it may happen in individual cases that the buffer plate is so heavily loaded by the counter buffer, namely by the edge of the buffer head of the counter buffer when driving through a curve, ie in the transverse direction in that the buffer plate begins to bulge and thereby kinked, sheared or pushed out of the recess. This is due primarily to the fact that the back of the buffer plate is not positively or non-positively connected to the bottom 13 of the recess 12. Such a load occurs in particular in tight curves when the edge of a buffer head acts on the buffer plate of the counter-buffer, since in this case said buffer plate is loaded not only in the axial direction, but in particular also laterally. Therefore, the biggest risk of damaging the buffer plate is caused by the acting lateral forces.

Fig. 2 zeigt einen erfindungsgemäss gestalteten Pufferkopf 1 im Längsschnitt. Wie aus dieser Darstellung ersichtlich ist, ist der Boden 4 der in den Pufferkopf 1 bzw. die Grundplatte 2 eingelassenen Ausnehmung 3 mit einer einer Vielzahl von rillenförmigen Vertiefung 5 versehen.Fig. 2 shows a inventively designed buffer head 1 in longitudinal section. As can be seen from this illustration, the bottom 4 of the recessed into the buffer head 1 and the base plate 2 recess 3 is provided with a plurality of groove-shaped recess 5.

Die Fig. 3 zeigt den Pufferkopf 1 gemäss Fig. 2 mit in die Ausnehmung eingesetzter Pufferplatte 6. Die Pufferplatte 6 kann beispielsweise aus Polyamid gefertigt werden und wird vorzugsweise gemäss dem in der EP-A-1 354 778 beschriebenen Verfahren in die Ausnehmung eingesetzt. Die rillenförmigen Vertiefungen 5 sollen sicherstellen, dass im Belastungsfall eine form- und kraftschlüssige Verbindung zwischen der Rückseite 7 der Pufferplatte 6 und dem Boden 4 der Ausnehmung 3 (Fig. 2) hergestellt wird, indem die Pufferplatte 6 durch den Gegenpuffer gegen diese rillenförmigen Vertiefungen 5 bzw. gegen die die rillenförmigen Vertiefungen 5 begrenzenden Erhebungen gedrückt wird, wodurch sich die Pufferplatte durch ihre materialelastische Nachgiebigkeit quasi in diesen Rillen verkrallt, so dass sie seitlich nicht verschoben werden kann. Damit ist auch die vorgängig geschilderte Gefahr des Aufwölbens und eines damit einhergehenden Abknickens, Abscherens, oder Herausdrückens der Pufferplatte 6 eliminiert.FIG. 3 shows the buffer head 1 according to FIG. 2 with the buffer plate 6 inserted into the recess. The buffer plate 6 can be produced, for example, from polyamide and is preferably made according to the method described in US Pat EP-A-1 354 778 described method used in the recess. The groove-shaped depressions 5 are intended to ensure that, in the case of loading, a positive and non-positive connection is produced between the back 7 of the buffer plate 6 and the bottom 4 of the recess 3 (FIG. 2), by the buffer plate 6 being pushed against the groove-shaped depressions 5 by the counter buffer or against which the groove-shaped recesses 5 delimiting surveys is pressed, whereby the buffer plate clawed by their material elastic resilience quasi in these grooves, so that they can not be moved laterally. Thus, the previously described danger of bulging and a concomitant kinking, shearing, or squeezing the buffer plate 6 is eliminated.

Schliesslich zeigt Fig. 4 eine Draufsicht auf den Pufferkopf 1 gemäss Fig. 2. Aus dieser Darstellung ist einerseits ersichtlich, dass die Ausnehmung 3 rund ist. Im weiteren sind die in den Boden 4 der Ausnehmung 3 eingelassenen rillenförmigen Vertiefungen 5 in schematischer Darstellung ersichtlich, wobei hier nur eine spiralförmig verlaufende Rille mit übertrieben gross dargestellter Steigung eingezeichnet ist. Wie ersichtlich, besitzt der Pufferkopf 1 eine grössere Breite als Höhe. Eine in Querrichtung durch das Zentrum der Pufferplatte 2 verlaufende Horizontale ist mit H bezeichnet.Finally, FIG. 4 shows a plan view of the buffer head 1 according to FIG. 2. On the one hand, it can be seen from this illustration that the recess 3 is round. In addition, the recessed in the bottom 4 of the recess 3 groove-shaped recesses 5 are shown in a schematic representation, in which case only a spiral-shaped groove is shown with exaggerated size shown slope. As can be seen, the buffer head 1 has a greater width than height. A horizontally extending in the transverse direction through the center of the buffer plate 2 is designated H.

Vorzugsweise wird sowohl die sphärische Vorderseite des Pufferkopfs 1 wie auch die Ausnehmung 3 und die Rille(n) 5 durch spanabhebende Bearbeitung auf einer Drehmaschine erzeugt. Für die Herstellung des Pufferkopfs 1 wird üblicherweise eine rechteckige Grundplatte 2 verwendet, die auf der Drehmaschine mit einer sphärischen Vorderseite versehen wird. Danach wird die Ausnehmung 3 durch Ausdrehen mittels eines geeigneten Bearbeitungswerkzeugs erzeugt. Schliesslich wird der Boden 4 der Ausnehmung 3 mit der genannten Rillenstruktur versehen, was ebenfalls durch spanabhebende Bearbeitung erfolgt. Vorzugsweise wird die Rille in Form einer Spirale angebracht. Dazu sticht das Bearbeitungswerkzeug -Drehstahlim Zentrum 8 der Ausnehmung 3 in den Boden 4 ein und wird danach radial nach aussen bewegt, während sich der Pufferkopf 1 in Relation zum Bearbeitungswerkzeug dreht. Die Rille kann natürlich auch umgekehrt hergestellt werden, indem das Bearbeitungswerkzeug von aussen nach innen bewegt wird. Die auf diese Weise erzeugte Rille hat vorzugsweise eine Tiefe zwischen 1 und 2 mm und eine Steigung von 1 bis 3 mm. Das Anbringen einer spiralförmigen Rille 5 am Boden 4 der Ausnehmung 3 ist schnell, einfach und kostengünstig zu bewerkstelligen, zumal die Formgebung des Pufferkopfs 1 ohnehin schon auf einer Drehmaschine erfolgt. Es versteht sich, dass anstelle einer spiralförmigen Rille 5 natürlich auch andere Formen von Erhebungen und/oder Vertiefungen vorgesehen werden können. Wichtig ist lediglich, dass die Erhebungen und/oder Vertiefungen nicht parallel zu der Horizontalen H verlaufen, sondern zumindest teilweise schräg, gekrümmt oder quer dazu, so dass sich die Pufferplatte beim Einwirken von Seitenkräften nicht nennenswert in seitlicher Richtung, d.h. parallel zur Horizontalen H, verschieben kann.Preferably, both the spherical front side of the buffer head 1 and the recess 3 and the groove (s) 5 are produced by machining on a lathe. For the production of the buffer head 1, usually a rectangular base plate 2 is used, which is provided on the lathe with a spherical front side. Thereafter, the recess 3 is produced by boring by means of a suitable machining tool. Finally, the bottom 4 of the recess 3 is provided with said groove structure, which also takes place by machining. Preferably, the groove is attached in the form of a spiral. For this purpose, the lathe machining tool centers in the center 4 of the recess 3 in the bottom 4 and is then moved radially outwards, while the buffer head 1 rotates in relation to the machining tool. Of course, the groove can also be made in reverse by moving the machining tool from the outside inwards. The groove produced in this way preferably has a depth between 1 and 2 mm and a pitch of 1 to 3 mm. The attachment of a spiral groove 5 at the bottom 4 of the recess 3 is quick, easy and inexpensive to accomplish, especially since the shape of the buffer head 1 already takes place on a lathe. It is understood that instead of a spiral groove 5, of course, other forms of elevations and / or depressions can be provided. It is only important that the elevations and / or depressions do not run parallel to the horizontal H, but at least partially oblique, curved or transverse thereto, so that the buffer plate upon exposure to Side forces not appreciably in the lateral direction, ie parallel to the horizontal H, can move.

Andererseits kann der Boden 4 der Ausnehmung 3 auch durch Laserbearbeitung, Schmieden, Erodieren oder durch Prägen mit Vertiefungen versehen werden, welche eine die Oberfläche vergrössernde Struktur bilden. Natürlich kann die Grundform des Pufferkopfs auch auf andere Weise, beispielsweise durch Schmieden, Giessen oder durch Biegen hergestellt werden. Anstelle von Vertiefungen könnten beispielsweise auch Erhebungen vorgesehen werden, welche beispielsweise beim Giessen erzeugt werden. Durch das Angiessen von Erhebungen bilden sich zwischen den Erhebungen natürlich automatisch auch wieder Vertiefungen.On the other hand, the bottom 4 of the recess 3 can also be provided by laser processing, forging, erosion or by embossing with depressions, which form a surface enlarging structure. Of course, the basic shape of the buffer head can also be produced in other ways, for example by forging, casting or by bending. Instead of depressions, for example, elevations could also be provided, which are produced, for example, during casting. By casting surveys, of course, recesses automatically form again between the surveys.

Anstelle einer runden Ausnehmung 3 sind natürlich auch davon abweichende Formen wie beispielsweise rechteckige oder ovale Ausnehmungen denkbar. Obwohl das Anbringen einer spiralförmig verlaufenden Rille sehr einfach und kostengünstig zu bewerkstelligen ist, kommen grundsätzlich natürlich auch andere Strukturen in Frage, welche in der Oberfläche der Vertiefung 5 Erhebungen und/oder Vertiefungen 4 bilden. Wichtig ist dabei insbesondere, dass die genannte Struktur die form- und kraftschlüssige Verbindung zwischen dem Boden der Ausnehmung und der Pufferplatte insbesondere beim Einwirken von Seitenkräften sicherstellt. Dies wird, wie bereits erwähnt, dadurch erreicht, dass die Erhebungen und/oder Vertiefungen nicht parallel zur Horizontalen H verlaufen und die Pufferplatte im Vergleich zu dem Pufferkopf vergleichsweise weich ist, so dass bei Druck-Belastung des Puffers eine form- und kraftschlüssige Verbindung zwischen der Rückseite der Pufferplatte und dem mit Erhebungen und/oder Vertiefungen 5 versehenen Boden 4 der Ausnehmung 3 im Pufferkopf bewirkt wird.Instead of a round recess 3, of course, deviating forms such as rectangular or oval recesses are conceivable. Although the attachment of a spiral groove is very easy and inexpensive to accomplish, in principle, of course, other structures in question, which form elevations and / or depressions 4 in the surface of the recess 5. It is important in particular that said structure ensures the positive and non-positive connection between the bottom of the recess and the buffer plate in particular when exposed to lateral forces. This is, as already mentioned, achieved in that the elevations and / or depressions are not parallel to the horizontal H and the buffer plate compared to the buffer head is comparatively soft, so that when pressure load of the buffer a positive and non-positive connection between the back of the buffer plate and provided with elevations and / or depressions 5 bottom 4 of the recess 3 is effected in the buffer head.

Jedenfalls hat eine solche Struktur den Vorteil, dass keine zusätzliche Verbindung beispielsweise in Form von Schrauben oder einer Klebverbindung zwischen der Pufferplatte und dem Pufferkopf vorgesehen werden muss.In any case, such a structure has the advantage that no additional connection, for example in the form of screws or an adhesive bond between the buffer plate and the buffer head must be provided.

Claims (10)

Puffer für Schienenfahrzeuge, mit einem mit einer Ausnehmung (3) versehenen Pufferkopf (1), in der eine aus Kunststoff bestehende Pufferplatte (6) aufgenommen und fixiert ist, dadurch gekennzeichnet, dass die Pufferplatte (6) auf der dem Boden (4) der Ausnehmung (3) zugewandten Rückseite eine im wesentlichen glatte Oberfläche aufweist, während der Boden (4) der Ausnehmung (3) mit Erhebungen und/oder Vertiefungen (5) versehen ist.Buffer for railway vehicles, having a buffer head (1) provided with a recess (3), in which a buffer plate (6) made of plastic is received and fixed, characterized in that the buffer plate (6) on the bottom (4) of Recess (3) facing the back has a substantially smooth surface, while the bottom (4) of the recess (3) with elevations and / or depressions (5) is provided. Puffer nach Anspruch 1, dadurch gekennzeichnet, dass in den Boden (4) der Ausnehmung (3) eine oder mehrere rillenartige Vertiefung(en) (5) eingelassen ist/sind.Buffer according to claim 1, characterized in that in the bottom (4) of the recess (3) one or more groove-like depression (s) (5) is inserted / are. Puffer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die rillenartige(n) Vertiefung(en) (5) spiralförmig in den Boden (4) der Ausnehmung (3) eingelassen ist/sind.Buffer according to claim 1 or 2, characterized in that the groove-like recess (s) (5) is spirally embedded in the bottom (4) of the recess (3) is / are. Puffer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sowohl die in den Pufferkopf (1) eingelassene Ausnehmung (3) wie auch die Pufferplatte (6) rund sind.Buffer according to one of the preceding claims, characterized in that both in the buffer head (1) recessed recess (3) and the buffer plate (6) are round. Puffer nach Anspruch 4, dadurch gekennzeichnet, dass eine spiralförmig verlaufende Vertiefung (5) in den Boden (4) der Ausnehmung (3) eingelassen ist, welche vom Zentrum (8) der Ausnehmung (3) spiralförmig nach aussen bzw. von aussen nach innen verläuft.Buffer according to claim 4, characterized in that a spirally extending recess (5) in the bottom (4) of the recess (3) is embedded, which from the center (8) of the recess (3) spirally outwards or from outside to inside runs. Puffer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ausnehmung (3), im Querschnitt gesehen, im wesentlich schwalbenschwanzförmig gestaltet ist und die Pufferplatte (6) derart korrespondierend ausgebildet ist, dass sie klemmend in der Ausnehmung (3) gehalten ist.Buffer according to one of the preceding claims, characterized in that the recess (3), seen in cross-section, is designed substantially dovetail-shaped and the buffer plate (6) is formed correspondingly such that it is clamped in the recess (3). Verfahren zum Herstellen eines Puffers für Schienenfahrzeuge, mit einem mit einer Ausnehmung (3) versehenen Pufferkopf (1), der zur Aufnahme einer aus Kunststoff bestehende Pufferplatte (6) ausgebildet ist, wobei die Pufferplatte (6) auf der dem Boden (4) der Ausnehmung (3) zugewandten Rückseite eine im wesentlichen glatte Oberfläche aufweist, dadurch gekennzeichnet, dass der Boden (4) der Ausnehmung (3) durch spanabhebende Bearbeitung, durch Laserbearbeitung, Schmieden, Erodieren, Prägen oder Giessen mit Vertiefungen und/oder Erhebungen versehen wird.Method for producing a buffer for rail vehicles, comprising a buffer head (1) provided with a recess (3) and designed to receive a buffer plate (6) made of plastic, the buffer plate (6) resting on the bottom (4) of the Recess (3) facing back has a substantially smooth surface, characterized in that the bottom (4) of the recess (3) is provided by machining, by laser machining, forging, eroding, embossing or molding with depressions and / or elevations. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass der Pufferkopf (1) durch spanabhebende Bearbeitung auf einer Drehmaschine mit der Ausnehmung (3) versehen wird, und dass danach die Struktur in den Boden (4) der Ausnehmung (3) eingelassen wird.A method according to claim 7, characterized in that the buffer head (1) is provided by machining on a lathe with the recess (3), and that thereafter the structure in the bottom (4) of the recess (3) is embedded. Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Pufferkopf (1) an einer Drehmaschine fixiert wird und die Struktur in Form einer oder mehrere Rille(n) (5) in den Boden (4) der Ausnehmung (3) eingelassen wird.A method according to claim 7 or 8, characterized in that the buffer head (1) is fixed to a lathe and the structure in the form of one or more groove (s) (5) in the bottom (4) of the recess (3) is embedded. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die jeweilige Rille (5) durch Bewegen eines Bearbeitungswerkzeugs vom Zentrum (8) der Ausnehmung (3) radial nach aussen in den Boden (4) der Ausnehmung (3) eingelassen wird.A method according to claim 9, characterized in that the respective groove (5) by moving a machining tool from the center (8) of the recess (3) radially inwardly into the bottom (4) of the recess (3) is embedded.
EP06405447A 2005-12-22 2006-10-23 Buffer for railway vehicles and method for manufacture of the buffer Not-in-force EP1800988B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH02042/05A CH701575B1 (en) 2005-12-22 2005-12-22 Buffer head for rail vehicles and method for producing the buffer head.

Publications (2)

Publication Number Publication Date
EP1800988A1 true EP1800988A1 (en) 2007-06-27
EP1800988B1 EP1800988B1 (en) 2008-12-03

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EP06405447A Not-in-force EP1800988B1 (en) 2005-12-22 2006-10-23 Buffer for railway vehicles and method for manufacture of the buffer

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EP (1) EP1800988B1 (en)
AT (1) ATE416115T1 (en)
CH (1) CH701575B1 (en)
DE (1) DE502006002249D1 (en)
ES (1) ES2317480T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2537730A1 (en) 2011-06-21 2012-12-26 Schwab Verkehrstechnik AG Buffer or coupling for a rail vehicle
CN109834230A (en) * 2018-11-02 2019-06-04 唐山市鑫彬铁路配件厂 A kind of casting die of draft gear housing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809137A (en) 1956-07-21 1959-02-18 John Henry Onions Improvements in or relating to plastic inserts for railway buffer heads
CH370109A (en) 1959-05-13 1963-06-30 Schweiz Wagons Aufzuegefab Buffers, in particular for rail vehicles
EP0887244A1 (en) * 1997-06-23 1998-12-30 Duewag Aktiengesellschaft Railcar buffer
EP1083105A2 (en) 1999-09-08 2001-03-14 Schwab Verkehrstechnik AG Buffer for railway vehicles
EP1354778A1 (en) 2002-04-17 2003-10-22 Schwab Verkehrstechnik AG Method for applying buffer disks made of plastic to the heads of buffers of railway vehicles and device for executing this method and buffer made by this method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809137A (en) 1956-07-21 1959-02-18 John Henry Onions Improvements in or relating to plastic inserts for railway buffer heads
CH370109A (en) 1959-05-13 1963-06-30 Schweiz Wagons Aufzuegefab Buffers, in particular for rail vehicles
EP0887244A1 (en) * 1997-06-23 1998-12-30 Duewag Aktiengesellschaft Railcar buffer
EP1083105A2 (en) 1999-09-08 2001-03-14 Schwab Verkehrstechnik AG Buffer for railway vehicles
EP1354778A1 (en) 2002-04-17 2003-10-22 Schwab Verkehrstechnik AG Method for applying buffer disks made of plastic to the heads of buffers of railway vehicles and device for executing this method and buffer made by this method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2537730A1 (en) 2011-06-21 2012-12-26 Schwab Verkehrstechnik AG Buffer or coupling for a rail vehicle
CN109834230A (en) * 2018-11-02 2019-06-04 唐山市鑫彬铁路配件厂 A kind of casting die of draft gear housing

Also Published As

Publication number Publication date
ES2317480T3 (en) 2009-04-16
DE502006002249D1 (en) 2009-01-15
EP1800988B1 (en) 2008-12-03
ATE416115T1 (en) 2008-12-15
CH701575B1 (en) 2011-02-15

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