EP0779197B1 - Einrichtung zum Sichern der Endlagen von Weichen- und Kreuzungsstellantrieben - Google Patents
Einrichtung zum Sichern der Endlagen von Weichen- und Kreuzungsstellantrieben Download PDFInfo
- Publication number
- EP0779197B1 EP0779197B1 EP96890186A EP96890186A EP0779197B1 EP 0779197 B1 EP0779197 B1 EP 0779197B1 EP 96890186 A EP96890186 A EP 96890186A EP 96890186 A EP96890186 A EP 96890186A EP 0779197 B1 EP0779197 B1 EP 0779197B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- piston
- locking members
- cylinder
- spring
- 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
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Classifications
-
- 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
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/10—Locking mechanisms for points; Means for indicating the setting of points
Definitions
- the invention relates to a device for securing the End positions for hydraulic actuators for turnout or Intersection parts in which at least one fluid can be applied Piston cooperates in its end position with a valve.
- FIG. 1 Facilities of the type mentioned can either with a pressure accumulator or a hydraulic pump.
- a mechanical drive can be provided, whereby the adjustment movement of a hydraulic cylinder piston unit is recorded, depending on the direction of adjustment displaced volume of this acting as a hydraulic pump first device further hydraulic actuators supplied is, so that a corresponding synchronous shift of Switch parts, especially long switch tongues over a large one Length of the same, can be made.
- the adjustment path of such hydraulic drives by stops be limited, with preference when reaching such Stop an opening valve is actuated. Pressure and temperature fluctuations, which extend over a longer period of time, can be substantially balanced with such valves become.
- EP 603 156 A1 a locking device for a Switch lock, in which two movable relative to each other Parts in a non-positive in at least one direction of movement Position are movable.
- a conventional hydraulic actuator for switches or Crossing parts have become known, for example, from CH 520 009 A.
- the invention now aims to set up a device to create the type mentioned, with which even with strong mechanical Shocks as well as with permanent forces each selected end position until a new one is applied definitive positive hydraulic pressure is maintained.
- the locking device should be in the cylinder piston unit of the hydraulic actuator can, even using small parts large adjustment stroke of the cylinder-piston unit released shall be.
- the invention consists in essential in that the Locking member sleeve is formed in two parts, wherein an inner sleeve slidably mounted coaxially to an outer sleeve and the openings for the Covers locking members.
- the construction according to the invention is such that the locking members guided in radial openings in a sleeve are, the sleeve against the force of a spring coaxial is movable.
- a sleeve can be preferred be formed by balls locking members, the Locking members, and in the case of balls the diameter of the Balls in the radial direction should be larger than the radial one Extension of the sleeve.
- the training according to the invention is such that the the sleeve guiding locking members is formed in two parts, an inner sleeve being displaceable coaxially with an outer sleeve is stored and the openings for in a sliding position covers the locking members.
- the inner sleeve holds the balls in particular Barriers in their position in which they subsequently follow immersing the piston against an abutment shoulder of the piston can be pressed resiliently.
- FIG. 1 shows the basic arrangement one behind the other switched actuators for switch and crossing parts
- Fig. 2 shows a longitudinal section through a hydraulic actuator End position assurance
- Fig. 3 shows a longitudinal section through a hydraulic actuator End position assurance
- Fig. 4 shows a longitudinal section through the hydraulic actuator according to the invention with end position assurance in a safe end position (Fig. 3), in a transitional position (Fig. 4), and in an adjustment position (Fig. 5).
- hydraulic actuators 1 are hydraulic Lines 2 connected one behind the other.
- the hydraulic Actuators are designed as cylinder piston units and have a piston 3, which in two cylinders 4th is axially slidably mounted.
- the piston 3 When pressurizing the Working rooms 5 through liquid supplied via line 2 the piston 3 is axially displaced.
- a stop shoulder 8 of the piston 3 works in this position with a device for securing the end position 9 together, ensuring that the piston 3rd remains in the end position against the force of a spring 10.
- the hydraulic Actuator 1 is while maintaining the reference numerals 1 from slidingly mounted in a cylinder 4 Piston 3 formed, the tightness of the working spaces by Sealing rings 11 is guaranteed.
- the piston 3 is in the respective end position by the securing device of the end position 9 held on one side of the cylinder piston unit. In this Position is immersed by the cylinder piston 3 during the displacement process Radially displaceable in a circumferential piston groove 12 Locking member 13, e.g.
- the sleeve 17th has openings 18 for guiding the locking members 13 in which the locking members 13 are axially supported and is against the force of the axially mounted in the circumferential groove 12
- Spring 10 also axially slidably mounted.
- the sleeve 17 is opposite to move the spring force so that the shut-off member 13 in the Piston circumferential groove 12 immersed.
- the operational readiness for Any adjustment is given when the locking members 13 completely into the circumferential groove 12 so that the Piston 3 is freely movable along the cylinder 4.
- the Location of the radially displaceable locking members 13 during the displacement process corresponds to the conditions on the the safety device in the secured state opposite side of the cylinder piston unit in Fig. 2.
- Fig. 3 now shows the embodiment of an actuator according to the invention, the construction being such that the displaceable locking members 13, by which the end position securing is accomplished, are not supported on the piston and must be carried along during the adjustment process.
- Fig. 3 shows the secured end position, in which a piston end part 19 is attached to the end of the piston.
- the entire piston is in turn axially displaceably mounted in a cylinder 4, the working spaces 3 being in turn sealed by seals 11.
- the two working spaces 5 of the hydraulic actuator are connected to one another by the bore 6 which coaxially penetrates the piston 3.
- the poppet valve 7 is also arranged. This is designed here as a check valve with a shut-off element, for example in the form of a ball 20.
- a spherical radially displaceable locking member 13 is in turn guided in a coaxially movably mounted driving sleeve 17 with openings 18.
- the driver sleeve 17 is guided on a stepped outer guide sleeve 25, which can be used from the front side in the cylinder 4 with the cylinder base 21 removed, which has the advantage over the embodiment according to FIG. 2 that the radially displaceable locking members 13 do not have to be moved ,
- the guide sleeve 25 On the face side, the guide sleeve 25 has an area of the smallest radius 26, which is adjoined by an area of larger radius 27, on which the driving sleeve 17 is axially displaceably mounted. In the secured position, as shown in Fig.
- the locking member 13 is displaced radially inward through the central region of the guide sleeve 25 so that part of the outer surface of the locking member 13 displaced radially inward abuts against the stop shoulder 8 of the piston end piece 19 and an offset of the piston can only take place when the force of the spring 10 is overcome.
- 4 shows the positions of the individual elements of the device for securing the end position during the transition from the end position into an axial displacement position of the piston 3.
- the locking member 13 guided in the driving sleeve 17 is carried along by the stop shoulder 8 until it plunges into an area adjoining the area 27 of the guide sleeve 25 with the largest clear cross-section 29 such that the stop shoulder 8, the driving sleeve 17 and that can move over displaceable locking member 13 carried by her and thus the piston is released from the secured position.
- an auxiliary spring 30 is supported on the bottom 21 of the cylinder and acts against the cover sleeve 31, the other end of which cooperates with the stop of the end piece 19.
- the piston 3 is axially displaced by a correspondingly applied pressure so that the end piece of the piston 19 is brought out of the area of interaction with the device for securing the end position 9.
- the maximum travel and the spring force of the auxiliary spring 30 and the length of the cover sleeve 31 are adjusted so that the outer wall of the cover sleeve 31, the falling out of the locking member 13 from the Breakthrough 18 prevented.
Description
Fig. 3 zeigt dabei die gesicherte Endlagenstellung, bei der am Ende des Kolbens ein Kolbenendteil 19 angebracht ist. Der gesamte Kolben ist wiederum in einen Zylinder 4 axial verschieblich gelagert, wobei die Arbeitsräume 3 durch Dichtungen 11 wiederum abgedichtet sind. Die beiden Arbeitsräume 5 des hydraulischen Stellantriebes sind durch die den Kolben 3 koaxial durchsetzende Bohrung 6 miteinander verbunden. Am Ende des auf die Kolbenstange gesetzten Endstückes 19 ist ebenfalls das Aufstoßventil 7 angeordnet. Dieses ist hier als Rückschlagventil mit einem Absperrorgan, z.B. in Form einer Kugel 20 ausgeführt. Bei Erreichen der Endlage wird die Kugel 20 durch einen am Boden 21 des Zylinders 4 angebrachten Vorsprung, z.B. in Form eines Bolzens 22, vom Ventilsitz entgegen der Kraft einer Ventilfeder 23 abgehoben, wodurch das Fluid des hydraulischen Stellantriebsystems durch die Bohrung 6 über einen Ringspalt zwischen Absperrorgan 20 und Ventilsitz in den Arbeitsraum 5 und durch die Öffnungen 24 in die Hydraulikleitungen 2 gemäß Fig. 1 abfließen kann. Die somit definierte Endlage wird durch die Einrichtung zum Sichern der Endlage 9 entgegen der Kraft einer koaxial zum Kolben wirkenden Feder 10 gewährleistet, sodaß etwaige Schläge oder sonstige äußere Einflüsse keinen Versatz der Weiche aus der Weichenstellung verursachen können. Ein kugelförmiges radial verlagerbares Sperrglied 13 ist hiebei wiederum in einer koaxial verschlieblich gelagerten Mitnehmerhülse 17 mit Durchbrüchen 18 geführt. Die Mitnehmerhülse 17 ist auf einer abgestuften äußeren Führungshülse 25 geführt, welche bei abgenommenem Zylinderboden 21 in den Zylinder 4 von der Stirnseite her einsetzbar ist, was gegenüber der Ausführungsform gemäß Fig. 2 den Vorteil ergibt, daß die radial verlagerbaren Sperrglieder 13 nicht mitbewegt werden müssen. Stirnseitig weist die Führungshülse 25 einen Bereich geringsten Radius 26 auf, an welchem sich ein Bereich größeren Radius 27 anschließt, auf dem die Mitnehmerhülse 17 axial verschiebbar gelagert ist. In der Sicherungslage, wie in Fig. 3 dargestellt, ist das Sperrglied 13 durch den mittleren Bereich der Führungshülse 25 so radial nach innen verlagert, daß ein Teil der Außenfläche des radial einwärts verlagerten Sperrgliedes 13 gegen die Anschlagschulter 8 des Kolbenendstückes 19 anschlägt und ein Versatz des Kolbens nur bei Überwindung der Kraft der Feder 10 erfolgen kann. Aus Fig. 4 sind die Lagen der einzelnen Elemente der Einrichtung zum Sichern der Endlage beim Übergang aus der Endlage in eine axiale Verschiebelage des Kolbens 3 ersichtlich. Durch Beaufschlagung der Druckkammer 5 mit Druck durch über die Öffnung 24 einströmenden Fluid wird der Kolben 3 bei Überwindung der Kraft der Feder 10 in Richtung des Pfeiles 28 bewegt, wobei gleichzeitig das Rückschlagventil 7 geschlossen wird. Bei diesem Vorgang wird das in der Mitnehmerhülse 17 geführte Sperrorgan 13 durch die Anschlagschulter 8 soweit mitgeführt, bis es in einen sich an den Bereich 27 der Führungshülse 25 anschließenden Bereich mit größtem lichten Querschnitt 29 derart eintaucht, daß die Anschlagschulter 8 die Mitnehmerhülse 17 und das von ihr mitgenommene verlagerbare Sperrglied 13 überstreichen kann und somit der Kolben aus der Sicherungslage freikommt. Um die Lösung aus der gesicherten Endlage durch Überwindung der Kraft der Feder 10 zu unterstützen, ist eine Hilfsfeder 30 am Boden 21 des Zylinders abgestützt und wirkt gegen die Deckhülse 31, deren anderes Ende mit dem Anschlag des Endstückes 19 zusammenwirkt. In Fig. 5 ist durch entsprechend aufgebrachten Druck der Kolben 3 soweit axial verlagert, daß das Endstück des Kolbens 19 aus dem Bereich des Zusammenwirkens mit der Einrichtung zum Sichern der Endlage 9 gebracht ist. Um zu verhindern, daß das Sperrglied 13 aus der Durchbrechung 18 der Mitnehmerhülse 17 gleitet, sind der maximale Federweg und die Federkraft der Hilfsfeder 30 und die Länge der Deckhülse 31 so abgestimmt, daß die Außenwand der Deckhülse 31, das Herausfallen des Sperrgliedes 13 aus der Durchbrechung 18 verhindert.
Claims (5)
- Einrichtung zum Sichern der Endlagen bei hydraulischen Stellantrieben (1) für Weichen- oder Kreuzungsteile, bei welchen wenigstens ein mit Fluid beaufschlagbarer Kolben (3) in seiner Endlage mit einem Ventil (7) zusammenwirkt, wobei koaxial zum Kolben (3) radial verlagerbare Sperrglieder (13) angeordnet sind, welche in der Sicherungslage federnd mit einer Anlageschulter (8) des Zylinders in axialer Richtung zusammenwirken, wobei die Sperrglieder (13) in radialen Durchbrechungen einer Hülse (17) geführt sind und die Hülse (17) entgegen der Kraft einer Feder (10) koaxial verschieblich ist, dadurch gekennzeichnet, daß die die Sperrglieder (13) führende Hülse (17) zweiteilig ausgebildet ist, wobei eine Innenhülse (31) koaxial zu einer Außenhülse (17) verschieblich gelagert ist und in einer Verschiebelage die Durchbrechungen (18) für die Sperrglieder (13) abdeckt.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Sperrglieder (13) in radialer Richtung größer als die radiale Erstreckung der Hülse (17) ausgebildet sind.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Innenhülse (31) federnd am Zylinder (4) oder dem Boden des Zylinders (21) abgestützt ist.
- Einrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß der Kolben (3) eine Anschlagschulter für die Innenhülse (31) der zweiteiligen Hülse (17,31) aufweist.
- Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Sperrglieder (13) von Kugeln gebildet sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT2026/95 | 1995-12-14 | ||
AT202695 | 1995-12-14 | ||
AT0202695A AT403463B (de) | 1995-12-14 | 1995-12-14 | Einrichtung zum sichern der endlagen von weichen- und kreuzungsstellantrieben |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0779197A1 EP0779197A1 (de) | 1997-06-18 |
EP0779197B1 true EP0779197B1 (de) | 2002-03-20 |
Family
ID=3526208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96890186A Expired - Lifetime EP0779197B1 (de) | 1995-12-14 | 1996-12-05 | Einrichtung zum Sichern der Endlagen von Weichen- und Kreuzungsstellantrieben |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0779197B1 (de) |
AT (2) | AT403463B (de) |
DE (1) | DE59608916D1 (de) |
PT (1) | PT779197E (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT406038B (de) * | 1997-12-17 | 2000-01-25 | Vae Ag | Einrichtung zum unterstützen der verschiebebewegung und zum elastischen verriegeln von beweglichen weichenteilen |
US6945156B2 (en) | 2001-01-11 | 2005-09-20 | VAE Eisenbahnsyteme GmbH | Device for switching and locking moving points components |
AT5757U1 (de) * | 2001-07-31 | 2002-11-25 | Vae Eisenbahnsysteme Gmbh | Einrichtung zum umstellen von weichen |
AT500296B1 (de) * | 2003-10-31 | 2006-12-15 | Vae Gmbh | Einrichtung zum verriegeln von endlagen von beweglichen weichenteilen, insbesondere weichenverschluss |
CZ20898U1 (cs) * | 2010-04-14 | 2010-05-17 | DT-VÝHYBKÁRNA A STROJÍRNA, a.s. | Akcní clen hydraulického záveru s mechanickým uzamykáním a závorováním |
US8684318B2 (en) | 2010-09-16 | 2014-04-01 | Spx International Limited | Mechanical lock |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH520009A (de) * | 1970-06-16 | 1972-03-15 | Int Standard Electric Corp | Elektrohydraulischer Antrieb zum Umstellen von auffahrbaren und nichtauffahrbaren Weichen in Eisenbahnanlagen |
DE2049873A1 (de) * | 1970-10-10 | 1972-04-13 | Goldschmidt Ag Th | Selbstverriegelnde Stellvorrichtung |
SI9300651A (en) * | 1992-12-17 | 1994-06-30 | Voest Alpine Eisenbahnsysteme | Device for bolding movable parts of railway switches |
CA2170128C (en) * | 1994-06-24 | 1999-05-11 | Gerald Durchschlag | Device for changing points |
AT403462B (de) * | 1995-05-03 | 1998-02-25 | Vae Ag | Einrichtung zum umstellen von weichen |
-
1995
- 1995-12-14 AT AT0202695A patent/AT403463B/de not_active IP Right Cessation
-
1996
- 1996-12-05 PT PT96890186T patent/PT779197E/pt unknown
- 1996-12-05 DE DE59608916T patent/DE59608916D1/de not_active Expired - Lifetime
- 1996-12-05 AT AT96890186T patent/ATE214672T1/de not_active IP Right Cessation
- 1996-12-05 EP EP96890186A patent/EP0779197B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59608916D1 (de) | 2002-04-25 |
PT779197E (pt) | 2002-07-31 |
ATE214672T1 (de) | 2002-04-15 |
AT403463B (de) | 1998-02-25 |
EP0779197A1 (de) | 1997-06-18 |
ATA202695A (de) | 1997-07-15 |
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