EP0592755A1 - Hydraulic unit - Google Patents

Hydraulic unit Download PDF

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Publication number
EP0592755A1
EP0592755A1 EP92890220A EP92890220A EP0592755A1 EP 0592755 A1 EP0592755 A1 EP 0592755A1 EP 92890220 A EP92890220 A EP 92890220A EP 92890220 A EP92890220 A EP 92890220A EP 0592755 A1 EP0592755 A1 EP 0592755A1
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EP
European Patent Office
Prior art keywords
piston rod
pressure medium
piston
hydraulic unit
rod side
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.)
Granted
Application number
EP92890220A
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German (de)
French (fr)
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EP0592755B1 (en
Inventor
Manfred Baumruck
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.)
Alcatel Lucent Austria AG
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Alcatel Austria 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.)
Filing date
Publication date
Priority to AT0008891A priority Critical patent/AT397790B/en
Priority to CS9292A priority patent/CZ279880B6/en
Priority to SK92-92A priority patent/SK278766B6/en
Priority to PL92293175A priority patent/PL166317B1/en
Priority to HU9200124A priority patent/HU210589B/en
Application filed by Alcatel Austria AG filed Critical Alcatel Austria AG
Priority to EP92890220A priority patent/EP0592755B1/en
Priority to ES92890220T priority patent/ES2078724T3/en
Priority to DE59203049T priority patent/DE59203049D1/en
Publication of EP0592755A1 publication Critical patent/EP0592755A1/en
Application granted granted Critical
Publication of EP0592755B1 publication Critical patent/EP0592755B1/en
Priority to GR950402122T priority patent/GR3017003T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/04—Fluid-pressure devices for operating points or scotch-blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
    • B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
    • B61L7/066—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission using electrically controlled fluid-pressure operated driving means

Definitions

  • the invention relates to a hydraulic unit for switch actuation, with an axially displaceably arranged cylinder sealed on a piston rod, bilateral piston rod, which has tapping elements for actuating adjusting elements, and with pressure medium lines arranged in the piston rod, which have working spaces in the cylinder on both sides of the piston - Connect the discharge line for the hydraulic medium.
  • Hydraulic cylinder-piston units or generally pressure-medium-actuated (i.e. also pneumatic) units of this type have long been known in various designs for a number of very different purposes and advantageously enable large forces with a simple structure and compact dimensions.
  • the cylinders including lines and control elements, are arranged in a fixed manner and the piston acts on any actuating or adjusting elements via a piston rod projecting out of the cylinder on one or both sides
  • arrangements have also become known in which the piston rod protruding from the cylinder on both sides is fixed and the cylinder is displaced in accordance with the pressure medium applied to actuate adjusting elements or the like.
  • a hydraulic unit of the type mentioned at the outset has become known, which serves as a point machine and is provided with a piston rod drilled on both sides up to the area of the piston in order to avoid exposed or freely laid pressure medium lines, over which the working spaces with those arranged on the bearing plates for the piston rod or the push rod Supply and discharge lines for the pressure medium are connected.
  • a particular disadvantage is the fact that there are relatively long pressure medium lines, a part of which in turn must be moved away freely by a pump and control unit.
  • the object of the present invention is to improve a hydraulic unit of the type mentioned at the outset in such a way that the disadvantages mentioned are avoided and in particular that a more compact design with fewer oil paths is possible while avoiding the need to lay exposed lines.
  • the piston rod side which has the pressure medium lines, has, in a bore extending axially into the piston region, a tube inserted to form an annular gap sealed at both ends, the interior of which as one of the pressure medium lines in the piston region via at least one connecting line is connected to the working space assigned to the other piston rod side, the Annular gap in the piston area than the other pressure medium line is connected via at least one further connecting line to the working space assigned to the pierced piston rod side.
  • This configuration enables the hydraulic unit to be manufactured in a very simple manner, it being possible for relatively large cross sections to be implemented for the pressure medium lines, which further contribute to reducing the flow resistances in the path of the pressure medium.
  • a largely symmetrical design of the pressure medium lines for the two usually also symmetrically designed working spaces is possible, which creates the same conditions for the two possible directions of movement.
  • the tube used can end before the piston-side end of the bore, the annular gap being sealed in this area by means of an annular seal. This measure simplifies the manufacture of the hydraulic unit and nevertheless ensures the required seal between the interior of the tube used and the annular gap.
  • connection part which has connecting bores from the inlet and outlet connections to the interior of the tube or to the gap.
  • the supply and discharge of the pressure medium thus take place at this connection part, which can also be arranged directly on a pump or control unit, for example, and again symmetrical conditions can be created very easily via the design of the connecting bores.
  • the hydraulic unit shown has an axially displaceable cylinder 3 arranged on a piston rod 2 which is fixed on both sides and which is sealed and which, for example, is molded in the die-cast tapping elements 4, which are designed here as holes 6 provided with tabs 6, for actuating adjusting elements (not shown) wearing.
  • These adjustment members can include, for example, one or more push rods for switching a rail switch or the like.
  • working spaces 8, 9 are formed on both sides of the piston 1, which have pressure medium lines 10, 11 running for the most part in the piston rod 2 with supply and discharge connections 12, 13 stay in contact.
  • These pressure medium lines 10, 11 are arranged for both working spaces 8, 9 in the same piston rod side 14 - the other piston rod side 15 is fully formed here and provided with a fastening device 16 for fixing the position.
  • the piston rod side 14 which has the pressure medium lines 10, 11, has in a bore 17 running axially into the region of the piston 1 a tube 21 inserted to form an annular gap 20 sealed at both ends 18, 19.
  • the interior 22 of this tube 21 is connected as the one pressure medium line 11 in the area of the piston 1 via connecting lines 23 to the working space 8 assigned to the other piston rod side 15.
  • the annular gap 20 serves as another pressure medium line 10 and is in turn in the area of the piston 1 via others Connecting lines 24 are connected to the working space 9 assigned to the pierced piston rod side 14.
  • the tube 21 used ends here before the piston-side end of the bore 17, the annular gap 20 being sealed in the region of its end 18 on this side by means of an annular seal 25.
  • the cylinder 3 moves according to the respective pressure medium supply and discharge via the supply and discharge connections 12 and 13 along the Double arrow 29 and takes over the tapping elements 4, the adjusting elements, not shown, or the like. Also not shown here are the necessary pump or control units which supply or discharge pressure medium via the supply or discharge connections 12, 13 accordingly for the desired implementation of this movement.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)

Abstract

In a hydraulic unit with a cylinder (1) which is arranged axially displaceably on a fixed piston rod (2) on both sides, the pressure medium lines (10,11), which connect working spaces (8,9), which lie on both sides of the piston (1) in the cylinder (3), to feed ports and discharge ports (12,13) for hydraulic medium, run together on one side in the same piston rod side (14). In this way, the necessity of laying free connecting lines is dispensed with whilst the lines for the hydraulic medium are made shorter overall. <IMAGE>

Description

Die Erfindung betrifft eine Hydraulikeinheit zur Weichenbetätigung, mit einem axial verschiebbar auf einer samt Kolben feststehenden, beidseitigen Kolbenstange abgedichtet angeordneten Zylinder, welcher Abgriffelemente zur Betätigung von Verstellorganen aufweist, und mit in der Kolbenstange angeordneten Druckmittelleitungen, welche beidseits des Kolbens liegende Arbeitsräume im Zylinder mit Zu- bzw. Ableitung für Hydraulikmedium verbinden.The invention relates to a hydraulic unit for switch actuation, with an axially displaceably arranged cylinder sealed on a piston rod, bilateral piston rod, which has tapping elements for actuating adjusting elements, and with pressure medium lines arranged in the piston rod, which have working spaces in the cylinder on both sides of the piston - Connect the discharge line for the hydraulic medium.

Hydraulische Zylinder-Kolben-Einheiten, bzw. allgemein druckmittelbetätigte (also auch etwa pneumatische) derartige Einheiten, sind in verschiedensten Ausführungen für eine Reihe teilweise sehr unterschiedlicher Zwecke seit langem bekannt und ermöglichen in vorteilhafter Weise große Kräfte bei einfachem Aufbau und kompakten Abmessungen. Abgesehen von Anordnungen, bei denen die Zylinder samt Leitungen und Steuerorganen feststehend angeordnet sind und der Kolben über eine einseitig oder aber auch beidseitig aus dem Zylinder ragende Kolbenstange auf irgendwelche Betätigungs- oder Verstellorgane einwirkt, sind für verschiedene Anwendungen, wie beispielsweise die eingangs genannte Weichenbetätigung, auch Anordnungen bekannt geworden, bei denen die beidseitig aus dem Zylinder ragende Kolbenstange feststehend montiert ist und der Zylinder entsprechend der Druckmittelbeaufschlagung zur Betätigung von Verstellorganen oder dergleichen verschoben wird.Hydraulic cylinder-piston units, or generally pressure-medium-actuated (i.e. also pneumatic) units of this type have long been known in various designs for a number of very different purposes and advantageously enable large forces with a simple structure and compact dimensions. Apart from arrangements in which the cylinders, including lines and control elements, are arranged in a fixed manner and the piston acts on any actuating or adjusting elements via a piston rod projecting out of the cylinder on one or both sides, for various applications, such as the switch actuation mentioned at the outset, arrangements have also become known in which the piston rod protruding from the cylinder on both sides is fixed and the cylinder is displaced in accordance with the pressure medium applied to actuate adjusting elements or the like.

So ist beispielsweise aus der DE-25 57 574-B2 eine Hydraulikeinheit der eingangs genannten Art bekannt geworden, welche als Weichenantrieb dient und zur Vermeidung von frei liegenden bzw. frei verlegten Druckmittelleitungen mit einer beidseitig bis in den Bereich des Kolbens angebohrten Kolbenstange versehen ist, über die die Arbeitsräume mit den an den Lagerplatten für die Kolbenstange bzw. die Schubstange angeordneten Zu- bzw. Ableitungen für das Druckmedium in Verbindung stehen. Nachteilig ist dabei insbesonders der Umstand, daß sich relativ lange Druckmittelleitungen ergeben, wobei ein Teil davon wiederum frei von einer Pumpen- und Steuereinheit wegverlegt werden muß.For example, from DE-25 57 574-B2, a hydraulic unit of the type mentioned at the outset has become known, which serves as a point machine and is provided with a piston rod drilled on both sides up to the area of the piston in order to avoid exposed or freely laid pressure medium lines, over which the working spaces with those arranged on the bearing plates for the piston rod or the push rod Supply and discharge lines for the pressure medium are connected. A particular disadvantage is the fact that there are relatively long pressure medium lines, a part of which in turn must be moved away freely by a pump and control unit.

Aufgabe der vorliegenden Erfindung ist es, eine Hydraulikeinheit der eingangs genannten Art so zu verbessern, daß die genannten Nachteile vermieden werden und daß insbesonders eine kompaktere Bauweise mit geringeren Ölwegen unter Vermeidung der Notwendigkeit der Verlegung von freiliegenden Leitungen ermöglicht wird.The object of the present invention is to improve a hydraulic unit of the type mentioned at the outset in such a way that the disadvantages mentioned are avoided and in particular that a more compact design with fewer oil paths is possible while avoiding the need to lay exposed lines.

Dies wird gemäß der vorliegenden Erfindung bei einer Hydraulikeinheit der genannten Art dadurch erreicht, daß die Druckmittelleitungen für beide Arbeitsräume in der gleichen Kolbenstangenseite angeordnet sind. Auf diese Weise kann nun die Druckmittelbeaufschlagung bzw. -ableitung zu bzw. von beiden Arbeitsräumen von einem Ende der beidseitigen Kolbenstange her vorgenommen werden. Dieses Ende kann beispielsweise auch unmittelbar an bzw. in unmittelbarer Nähe der Pumpen- bzw. Steuereinheit für das Druckmedium festgelegt sein, sodaß frei verlegte Leitungen überhaupt vermieden werden können und geringe Wege für das Druck- bzw. Hydraulikmedium mit geringeren Reibungsverlusten realisierbar sind. Es ergibt sich eine kompakte Bauweise, die auch weniger störungsanfällig ist.This is achieved according to the present invention in a hydraulic unit of the type mentioned in that the pressure medium lines for both work spaces are arranged in the same piston rod side. In this way, the pressure medium supply or discharge to or from both working spaces can now be carried out from one end of the piston rod on both sides. This end can, for example, also be fixed directly on or in the immediate vicinity of the pump or control unit for the pressure medium, so that freely routed lines can be avoided at all and short paths for the pressure or hydraulic medium can be realized with lower friction losses. The result is a compact design that is also less prone to malfunction.

Nach einer besonders bevorzugten Ausgestaltung der Erfindung ist vorgesehen, daß die die Druckmittelleitungen aufweisende Kolbenstangenseite in einer axial bis in den Kolbenbereich verlaufenden Bohrung ein unter Bildung eines an beiden Enden abgedichteten Ringspaltes eingesetztes Rohr aufweist, dessen Innenraum als eine der Druckmittelleitungen im Kolbenbereich über zumindest eine Verbindungsleitung mit dem der anderen Kolbenstangenseite zugeordneten Arbeitsraum verbunden ist, wobei der Ringspalt im Kolbenbereich als die andere Druckmittelleitung über zumindest eine weitere Verbindungsleitung mit dem der durchbohrten Kolbenstangenseite zugeordneten Arbeitsraum verbunden ist. Diese Ausgestaltung ermöglicht eine sehr einfache Herstellung der Hydraulikeinheit, wobei relativ große Querschnitte für die Druckmittelleitungen realisierbar sind, die weiter zu einer Verringerung der Strömungswiderstände im Weg des Druckmediums beitragen. Es ist dabei auch eine weitestgehend symmetrische Ausbildung der Druckmittelleitungen für die beiden üblicherweise ebenfalls symmetrisch ausgebildeten Arbeitsräume möglich, womit gleiche Verhältnisse für die beiden möglichen Bewegungsrichtungen geschaffen sind.According to a particularly preferred embodiment of the invention, it is provided that the piston rod side, which has the pressure medium lines, has, in a bore extending axially into the piston region, a tube inserted to form an annular gap sealed at both ends, the interior of which as one of the pressure medium lines in the piston region via at least one connecting line is connected to the working space assigned to the other piston rod side, the Annular gap in the piston area than the other pressure medium line is connected via at least one further connecting line to the working space assigned to the pierced piston rod side. This configuration enables the hydraulic unit to be manufactured in a very simple manner, it being possible for relatively large cross sections to be implemented for the pressure medium lines, which further contribute to reducing the flow resistances in the path of the pressure medium. A largely symmetrical design of the pressure medium lines for the two usually also symmetrically designed working spaces is possible, which creates the same conditions for the two possible directions of movement.

Das eingesetzte Rohr kann in weiterer Ausbildung der Erfindung bereits vor dem kolbenseitigen Ende der Bohrung enden, wobei der Ringspalt in diesem Bereich mittels einer Ringdichtung abgedichtet ist. Durch diese Maßnahme wird die Herstellung der Hydraulikeinheit vereinfacht und trotzdem die erforderliche Abdichtung zwischen dem Innenraum des eingesetzten Rohres und dem Ringspalt sichergestellt.In a further embodiment of the invention, the tube used can end before the piston-side end of the bore, the annular gap being sealed in this area by means of an annular seal. This measure simplifies the manufacture of the hydraulic unit and nevertheless ensures the required seal between the interior of the tube used and the annular gap.

Nach einer bevorzugten weiteren Ausgestaltung der Erfindung ist das äußere Ende der durchbohrten Kolbenstangenseite ebenso wie das entsprechende Ende des eingesetzten Rohres abgedichtet in einem Anschlußteil festgelegt, welcher Verbindungsbohrungen von den Zu- bzw. Ableitanschlüssen zum Innenraum des Rohres bzw. zum Spalt aufweist. An diesem Anschlußteil, der beispielsweise auch unmittelbar an einer Pumpen- bzw. Steuereinheit angeordnet sein kann, erfolgen damit die Zu- und Ableitung des Druckmediums, wobei wiederum über die Ausgestaltung der Verbindungsbohrungen sehr einfach symmetrische Verhältnisse geschaffen werden können.According to a preferred further embodiment of the invention, the outer end of the pierced piston rod side and the corresponding end of the tube used are sealed in a connection part which has connecting bores from the inlet and outlet connections to the interior of the tube or to the gap. The supply and discharge of the pressure medium thus take place at this connection part, which can also be arranged directly on a pump or control unit, for example, and again symmetrical conditions can be created very easily via the design of the connecting bores.

Die Erfindung wird im folgenden noch anhand des in der Zeichnung schematisch im teilweisen Schnitt dargestellten Ausführungsbeispieles näher erläutert.The invention is explained in more detail below with reference to the exemplary embodiment shown schematically in the drawing in partial section.

Die dargestellte Hydraulikeinheit weist einen axial verschiebbar auf einer samt Kolben 1 feststehenden, beidseitigen Kolbenstange 2 abgedichtet angeordneten Zylinder 3 auf, welcher beispielsweise im Druckguß angeformte Abgriffelemente 4, die hier als mit Bohrungen 5 versehene Laschen 6 ausgeführt sind, zur Betätigung von nicht weiter dargestellten Verstellorganen trägt. Diese Verstellorgane können beispielsweise eine oder mehrere Schubstangen zur Umschaltung einer Schienenweiche oder dergleichen umfassen.The hydraulic unit shown has an axially displaceable cylinder 3 arranged on a piston rod 2 which is fixed on both sides and which is sealed and which, for example, is molded in the die-cast tapping elements 4, which are designed here as holes 6 provided with tabs 6, for actuating adjusting elements (not shown) wearing. These adjustment members can include, for example, one or more push rods for switching a rail switch or the like.

Zwischen der Innenwand 7 des Zylinders 3 und der Kolbenstange 2 mit dem Kolben 1 sind beidseits des Kolbens 1 liegende Arbeitsräume 8, 9 ausgebildet, die über zum größten Teil in der Kolbenstange 2 verlaufende Druckmittelleitungen 10, 11 mit Zu- bzw. Ableitanschlüssen 12, 13 in Verbindung stehen. Diese Druckmittelleitungen 10, 11 sind für beide Arbeitsräume 8, 9 in der gleichen Kolbenstangenseite 14 angeordnet - die andere Kolbenstangenseite 15 ist hier voll ausgebildet und mit einer Befestigungseinrichtung 16 zur Lagefestlegung versehen.Between the inner wall 7 of the cylinder 3 and the piston rod 2 with the piston 1, working spaces 8, 9 are formed on both sides of the piston 1, which have pressure medium lines 10, 11 running for the most part in the piston rod 2 with supply and discharge connections 12, 13 stay in contact. These pressure medium lines 10, 11 are arranged for both working spaces 8, 9 in the same piston rod side 14 - the other piston rod side 15 is fully formed here and provided with a fastening device 16 for fixing the position.

Die die Druckmittelleitungen 10, 11 aufweisende Kolbenstangenseite 14 weist in einer axial bis in den Bereich des Kolbens 1 verlaufenden Bohrung 17 ein unter Bildung eines an beiden Enden 18, 19 abgedichteten Ringspaltes 20 eingesetztes Rohr 21 auf. Der Innenraum 22 dieses Rohres 21 ist als die eine Druckmittelleitung 11 im Bereich des Kolbens 1 über Verbindungsleitungen 23 mit dem der anderen Kolbenstangenseite 15 zugeordneten Arbeitsraum 8 verbunden. Der Ringspalt 20 dient als andere Druckmittelleitung 10 und ist wiederum im Bereich des Kolbens 1 über weitere Verbindungsleitungen 24 mit dem der durchbohrten Kolbenstangenseite 14 zugeordneten Arbeitsraum 9 verbunden.The piston rod side 14, which has the pressure medium lines 10, 11, has in a bore 17 running axially into the region of the piston 1 a tube 21 inserted to form an annular gap 20 sealed at both ends 18, 19. The interior 22 of this tube 21 is connected as the one pressure medium line 11 in the area of the piston 1 via connecting lines 23 to the working space 8 assigned to the other piston rod side 15. The annular gap 20 serves as another pressure medium line 10 and is in turn in the area of the piston 1 via others Connecting lines 24 are connected to the working space 9 assigned to the pierced piston rod side 14.

Das eingesetzte Rohr 21 endet hier bereits vor dem kolbenseitigen Ende der Bohrung 17, wobei der Ringspalt 20 im Bereich seines diesseitigen Endes 18 mittels einer Ringdichtung 25 abgedichtet ist.The tube 21 used ends here before the piston-side end of the bore 17, the annular gap 20 being sealed in the region of its end 18 on this side by means of an annular seal 25.

Das äußere Ende der durchbohrten Kolbenstangenseite 14 ist ebenso wie das entsprechende Ende des eingesetzten Rohres 21 abgedichtet in einem Anschlußteil 26 festgelegt, welcher Verbindungsbohrungen 27, 28 von den Zu- bzw. Ableitanschlüssen 12, 13 zum Innenraum 22 des Rohres 21 bzw. zum Ringspalt 20 aufweist.The outer end of the pierced piston rod side 14, like the corresponding end of the tube 21 used, is fixed in a sealed manner in a connecting part 26, which connecting bores 27, 28 from the inlet and outlet connections 12, 13 to the interior 22 of the tube 21 or to the annular gap 20 having.

Da die Kolbenstange 2 samt dem Kolben 1 an der Befestigungseinrichtung 16 und zumeist auch im Bereich des Anschlußteiles 26 festgelegt ist, bewegt sich der Zylinder 3 entsprechend der jeweiligen Druckmittelzu- bzw. -abführung über die Zu- bzw. Ableitanschlüsse 12 bzw. 13 entlang des Doppelpfeiles 29 und nimmt dabei über die Abgriffelemente 4 die nicht dargestellten Verstellorgane oder dergleichen mit. Ebenfalls nicht dargestellt sind hier die erforderlichen Pumpen- bzw. Steuereinheiten, die zur gewünschten Durchführung dieser Bewegung Druckmedium über die Zu- bzw. Ableitanschlüsse 12, 13 entsprechend zu- oder abführen.Since the piston rod 2 together with the piston 1 is fixed to the fastening device 16 and mostly also in the area of the connecting part 26, the cylinder 3 moves according to the respective pressure medium supply and discharge via the supply and discharge connections 12 and 13 along the Double arrow 29 and takes over the tapping elements 4, the adjusting elements, not shown, or the like. Also not shown here are the necessary pump or control units which supply or discharge pressure medium via the supply or discharge connections 12, 13 accordingly for the desired implementation of this movement.

Claims (4)

Hydraulikeinheit zur Weichenbetätigung mit einem axial verschiebbar auf einer samt Kolben feststehenden, beidseitigen Kolben-stange abgedichtet angeordneten Zylinder, welcher Abgriffelemente zur Betätigung von Verstellorganen aufweist, und mit in der Kolbenstange angeordneten Druckmittelleitungen, welche beidseits des Kolbens liegende Arbeitsräume im Zylinder mit Zu- bzw. Ableitung für Hydraulikmedium verbinden, dadurch gekennzeichnet, daß die Druckmittelleitungen (10,11) für beide Arbeitsräume (8,9) in der gleichen Kolbenstangenseite (14) angeordnet sind.Hydraulic unit for switch actuation with an axially displaceable cylinder sealed on a piston rod, bilateral piston rod, which has tapping elements for actuating adjusting elements, and with pressure medium lines arranged in the piston rod, which have working spaces in the cylinder on both sides of the piston Connect the discharge line for the hydraulic medium, characterized in that the pressure medium lines (10, 11) for both working spaces (8, 9) are arranged in the same piston rod side (14). Hydraulikeinheit nach Anspruch 1, dadurch gekennzeichnet, daß die die Druckmittelleitungen (10,11) aufweisende Kolbenstangenseite (14) in einer axial bis in den Kolbenbereich verlaufenden Bohrung (17) ein unter Bildung eines an beiden Enden (18,19) abgedichteten Ringspaltes (20) eingesetztes Rohr (21) aufweist, dessen Innenraum (22) als eine der Druckmittelleitungen (11) im Kolbenbereich über zumindest eine Verbindungsleitung (23) mit dem der anderen Kolbenstangenseite (15) zugeordneten Arbeitsraum (8) verbunden ist, wobei der Ringspalt (20) im Kolbenbereich als die andere Druckmittelleitung (10) über zumindest eine weitere Verbindungsleitung (24) mit dem der durchbohrten Kolbenstangenseite (14) zugeordneten Arbeitsraum (9) verbunden ist.Hydraulic unit according to Claim 1, characterized in that the piston rod side (14) which has the pressure medium lines (10, 11) has an annular gap (20) which is sealed at both ends (18, 19) in an axially extending bore (17) ) inserted tube (21), the interior (22) of which is connected as one of the pressure medium lines (11) in the piston area via at least one connecting line (23) to the working chamber (8) assigned to the other piston rod side (15), the annular gap (20 ) in the piston area than the other pressure medium line (10) is connected via at least one further connecting line (24) to the working space (9) assigned to the pierced piston rod side (14). Hydraulikeinheit nach Anspruch 2, dadurch gekennzeichnet, daß das eingesetzte Rohr (21) bereits vor dem kolbenseitigen Ende der Bohrung (17) endet, wobei der Ringspalt (20) in diesem Bereich mittels einer Ringdichtung (25) abgedichtet ist.Hydraulic unit according to Claim 2, characterized in that the tube (21) used ends before the end of the bore (17) on the piston side, the annular gap (20) being sealed in this area by means of an annular seal (25). Hydraulikeinheit nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß das äußere Ende der durchbohrten Kolbenstangenseite (14) ebenso wie das entsprechende Ende des eingesetzten Rohres (21) abgedichtet in einem Anschlußteil (26) festgelegt ist, welcher Verbindungsbohrungen (27,28) von den Zu- bzw. Ableitanschlüssen (12,13) zum Innenraum (22) des Rohres (21) bzw. zum Ringspalt (20) aufweist.Hydraulic unit according to claim 2 or 3, characterized in that the outer end of the pierced piston rod side (14) as well as the corresponding end of the tube (21) used is sealed in a connecting part (26) which connecting bores (27, 28) of the Has inlet or outlet connections (12, 13) to the interior (22) of the tube (21) or to the annular gap (20).
EP92890220A 1991-01-16 1992-10-14 Hydraulic unit Expired - Lifetime EP0592755B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
AT0008891A AT397790B (en) 1991-01-16 1991-01-16 HYDRAULIC UNIT
SK92-92A SK278766B6 (en) 1991-01-16 1992-01-13 Hydraulic unit, particularly for throwing-over of the points
CS9292A CZ279880B6 (en) 1991-01-16 1992-01-13 Hydraulic unit, intended particularly for throwing-over the points
PL92293175A PL166317B1 (en) 1991-01-16 1992-01-14 Hydraulic unit
HU9200124A HU210589B (en) 1991-01-16 1992-01-15 Hydraulic unit
EP92890220A EP0592755B1 (en) 1991-01-16 1992-10-14 Hydraulic unit
ES92890220T ES2078724T3 (en) 1991-01-16 1992-10-14 HYDRAULIC UNIT.
DE59203049T DE59203049D1 (en) 1991-01-16 1992-10-14 Hydraulic unit.
GR950402122T GR3017003T3 (en) 1991-01-16 1995-08-02 Hydraulic unit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0008891A AT397790B (en) 1991-01-16 1991-01-16 HYDRAULIC UNIT
EP92890220A EP0592755B1 (en) 1991-01-16 1992-10-14 Hydraulic unit

Publications (2)

Publication Number Publication Date
EP0592755A1 true EP0592755A1 (en) 1994-04-20
EP0592755B1 EP0592755B1 (en) 1995-07-26

Family

ID=25591405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92890220A Expired - Lifetime EP0592755B1 (en) 1991-01-16 1992-10-14 Hydraulic unit

Country Status (9)

Country Link
EP (1) EP0592755B1 (en)
AT (1) AT397790B (en)
CZ (1) CZ279880B6 (en)
DE (1) DE59203049D1 (en)
ES (1) ES2078724T3 (en)
GR (1) GR3017003T3 (en)
HU (1) HU210589B (en)
PL (1) PL166317B1 (en)
SK (1) SK278766B6 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0824082A1 (en) * 1996-08-05 1998-02-18 BWG Butzbacher Weichenbau GmbH Setting arrangement
WO2002055360A1 (en) * 2001-01-11 2002-07-18 Vae Eisenbahnsysteme Gmbh Device for switching and locking moving points components
CN106439007A (en) * 2016-06-30 2017-02-22 德阳万达重型机械设备制造有限公司 High-strength isostatic pressing machine working cylinder and preparation process thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878214C (en) * 1951-12-22 1953-06-01 Gustav Strunk G M B H Maschf Point setting device, primarily for underground operations
US3068900A (en) * 1959-06-26 1962-12-18 Westinghouse Air Brake Co Valve assembly
DE1155159B (en) * 1960-02-16 1963-10-03 Krug & Co Heinrich Hydraulic point setting device
DE1168948B (en) * 1960-08-16 1964-04-30 Krug & Co Heinrich Point machine
DE2557574A1 (en) * 1975-12-20 1977-06-30 Fabeg Gmbh Electrohydraulic railway points operation - has hydraulic unit with tank for liquid, pump, pressure limiting device and nonreturn valves

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT15472B (en) * 1900-03-07 1904-03-10 Murray Corrington
US4428552A (en) * 1981-05-04 1984-01-31 Abex Corporation Railroad switch machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878214C (en) * 1951-12-22 1953-06-01 Gustav Strunk G M B H Maschf Point setting device, primarily for underground operations
US3068900A (en) * 1959-06-26 1962-12-18 Westinghouse Air Brake Co Valve assembly
DE1155159B (en) * 1960-02-16 1963-10-03 Krug & Co Heinrich Hydraulic point setting device
DE1168948B (en) * 1960-08-16 1964-04-30 Krug & Co Heinrich Point machine
DE2557574A1 (en) * 1975-12-20 1977-06-30 Fabeg Gmbh Electrohydraulic railway points operation - has hydraulic unit with tank for liquid, pump, pressure limiting device and nonreturn valves

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0824082A1 (en) * 1996-08-05 1998-02-18 BWG Butzbacher Weichenbau GmbH Setting arrangement
WO2002055360A1 (en) * 2001-01-11 2002-07-18 Vae Eisenbahnsysteme Gmbh Device for switching and locking moving points components
US6945156B2 (en) 2001-01-11 2005-09-20 VAE Eisenbahnsyteme GmbH Device for switching and locking moving points components
CN106439007A (en) * 2016-06-30 2017-02-22 德阳万达重型机械设备制造有限公司 High-strength isostatic pressing machine working cylinder and preparation process thereof

Also Published As

Publication number Publication date
HU9200124D0 (en) 1992-04-28
ES2078724T3 (en) 1995-12-16
AT397790B (en) 1994-06-27
HUT63231A (en) 1993-07-28
EP0592755B1 (en) 1995-07-26
DE59203049D1 (en) 1995-08-31
CZ279880B6 (en) 1995-08-16
GR3017003T3 (en) 1995-11-30
ATA8891A (en) 1993-11-15
PL166317B1 (en) 1995-05-31
CS9292A3 (en) 1992-08-12
SK278766B6 (en) 1998-02-04
PL293175A1 (en) 1992-09-21
HU210589B (en) 1995-05-29

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