EP2210853A2 - Locking system for telescopic crane boom with displaceable locking unit - Google Patents

Locking system for telescopic crane boom with displaceable locking unit Download PDF

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Publication number
EP2210853A2
EP2210853A2 EP09176745A EP09176745A EP2210853A2 EP 2210853 A2 EP2210853 A2 EP 2210853A2 EP 09176745 A EP09176745 A EP 09176745A EP 09176745 A EP09176745 A EP 09176745A EP 2210853 A2 EP2210853 A2 EP 2210853A2
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EP
European Patent Office
Prior art keywords
locking
telescoping cylinder
locking unit
telescopic
locking system
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
EP09176745A
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German (de)
French (fr)
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EP2210853A3 (en
EP2210853B1 (en
Inventor
Johannes Schürmann
Dieter Stührwoldt
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.)
Manitowoc Crane Group France SAS
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Manitowoc Crane Group France SAS
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Publication of EP2210853A2 publication Critical patent/EP2210853A2/en
Publication of EP2210853A3 publication Critical patent/EP2210853A3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks

Definitions

  • the invention relates to a locking system for a telescopic crane boom, in particular for a mobile crane.
  • a telescoping cylinder for the method is provided a plurality of telescopic parts, which has a locking unit.
  • This locking unit in turn serves to produce a lock between the telescoping cylinder and one of the telescopic parts that is about to extend or retract.
  • the present invention relates to a telescopic boom in which a telescoping cylinder extends and locks boom parts.
  • Modern mobile cranes are used to lift increasingly heavy loads at ever-increasing heights.
  • the claim of users to use a high-performance mobile crane with as little dead weight as possible in order to save on logistics costs is increasing.
  • the aim is to get a mobile crane with the highest possible load on as few axles within the permissible axle loads, which on the one hand has a favorable effect on the maneuverability and on the other lowering on the total cost of the crane.
  • the telescopic boom is a core element of the mobile crane; It determines maximum lifting height and carrying capacity.
  • the boom length is determined by the number and length of the individual telescope parts.
  • the individual telescope parts must keep an overlap in the extended state, so that the frictional connection perpendicular to the boom direction is ensured with each other.
  • the traction in the boom direction is achieved by the locking of the telescopes. Due to the design, the telescopic parts in the retracted state can not be completely retracted into each other. At the front end are to stiffen the telescopic parts collar parts that survive outside. Furthermore, the locking points for the telelocking are arranged longitudinally in front of each other. Thus, the telescoping cylinder can be locked with a telescopic part, so a path in the longitudinal direction of the boom must be covered to bring the locking unit at a height with the telescope to be locked.
  • the telescoping cylinder must be extended together with the locking unit for each telescopic part according to a piece and thereby loses part of its total stroke. Therefore, taking into account the total stroke of the telescopic cylinder, the front telescopic parts can not be extended as far as the rear ones. This results in an unnecessarily large overlap of the front telescopic parts in the extended state and an associated loss of boom overall length.
  • the locking unit is arranged longitudinally displaceable on the telescoping cylinder.
  • the position of the telescoping cylinder and the position of the locking unit which always caused each other according to the prior art, are decoupled from each other.
  • this can be achieved without a movement of the telescoping cylinder or even against a movement of the telescoping cylinder in a different direction
  • Approach locking point by the locking device which significantly increases the functionality and greatly reduced or eliminated restrictions on the operation or mode of operation.
  • the path that the locking unit can travel or the location that the locking unit can reach is no longer limited by the movability of the telescoping cylinder or its arrangement freedom.
  • additional Teleskopierweg won or length can be saved on the telescoping cylinder, which in turn saves overall boom weight and thus optimizes the crane as a whole.
  • the locking unit in a fixable manner on the telescopic cylinder, in particular fixable in any position. It can also be designed as a second stage on the telescoping cylinder or arranged on a second stage of the telescoping cylinder.
  • at least one length measuring device or a length transmitter is provided, which can detect the position of locking unit and telescoping cylinder, in particular the relative position of the two or their absolute positions. According to the invention and especially with such a configuration can then, after the correct position of the locking unit found and this was locked with the corresponding telescope, for example, a seat valve is closed and fixed with the cylinder stage of the locking unit. Then the steel construction lock to the next telescopic part can be solved, and the telescoping cylinder can extend the just engaged with the locking unit engaged telescope part, the full stroke of the telescoping cylinder is available.
  • Moving the locking unit in particular the second stage of Teleskopierzylinders with the locking unit thereon, is carried out according to an embodiment of the invention in the powerless unlocked state of Teleskopierzylinders, and accordingly only small forces are required for moving, from the hydraulic supply from the cylinder bushing for extending can be applied when the locking unit - according to a variant according to the invention - can be moved by hydraulic loading on Teleskopierzylinder.
  • a hydraulic circuit can be provided, which controls an actuation and / or fixation of the displaceable locking unit in conjunction with the extension hydraulics of the telescoping cylinder.
  • the retraction is then preferably by a releasable connection to the ring side of Teleskopierzylinders.
  • the locking unit is displaceable according to an embodiment by a distance on the telescoping cylinder, which corresponds to at least the distance of all telescopic boom unlockings in the retracted state of the boom.
  • a distance on the telescoping cylinder which corresponds to at least the distance of all telescopic boom unlockings in the retracted state of the boom.
  • FIG. 1 In a schematic longitudinal sectional view, there is shown a telescopic boom which comprises a main body 11 and four extendable telescopic parts 1 to 4.
  • the base body 11 In the base body 11 is the telescopic cylinder 10.
  • the locking unit 21 On the outer cylinder tube of the telescoping cylinder 10 runs the locking unit 21, which consists of a second cylinder stage 6 and the cylinder lock 5.
  • the second cylinder stage 6 is located above the outer tube 8 of the telescoping cylinder 10, which is shown separately here.
  • the actuation 7 for the steel construction lock 9 is arranged on the telescoping cylinder 10, which locks the individual telescope parts to one another when they have been brought into an operating state.
  • exporting takes place-in particular automatically-in the order described below:
  • All telescopic parts 1 to 4 are initially retracted and locked together (Stahlbauverrieglung 9). Now moves the second stage 6 in the foot of the telescope 4 and is there in the door provided for locking (recess) locked. The steel construction lock 9 to the telescope 3 is released, and the telescoping cylinder 10 moves with the telescope 4 maximum, to lock it there with the telescope 3. Then the cylinder lock 5 is released and the telescoping cylinder 10 completely retracted. Now the second cylinder stage 6 is retracted so far, until the foot piece is reached by the telescope 3 to lock there. In this way, all telescope parts 1 to 4 can be extended one after the other.
  • the extendable length of the telescopic part 4 is thanks to sliding locking unit 21 equal to the length Tges.
  • the length would be shortened by ⁇ T4, whereas in the present invention an extension of the entire boom in the extended state may take place by the sum of all illustrated ⁇ ST.
  • the locking unit 21 can be made so far displaced that the stroke of the telescoping cylinder 10 no longer has to correspond to the mobile way of the telescope part. In this case, telescoping cylinder 10 and locking unit 21 share the total stroke of a telescopic part 1 to 4, and thus the total length of the telescoping cylinder 10 can be significantly shortened.
  • the second stage of Teleskopierzylinders 20 from the cylinder tube 26, which is the outer cylinder tube encloses the actual telescoping cylinder 20.
  • the oil volumes 30 and 31 are based on the ring 32 fixedly connected to (or part of) the telescoping cylinder 20.
  • the cylinder feedthrough 35 serves to hydraulically supply the valve unit 28. From here, the supply is switched as required to the cylinder lock 25, the steel construction lock 29 or second cylinder stage 26 in order to displace the entire locking unit 21. To push out in the direction of travel, the load-facing side of the ring 31 is connected to the relieved ring side 27 of the Teleskopierzylinders 20. Furthermore, the load side 30 is connected to the pressurized cylinder duct 35. A pilot-operated check valve 22 prevents the unwanted retraction of the locking unit 21.
  • the load-side annular space 30 of the locking unit 21 is connected to the unloaded cylinder duct 35. Furthermore, the load-facing annular space 31 is connected to the pressurized side 27 of the telescoping cylinder 20 and thereby the pilot-operated check valve 22 is opened.

Abstract

The locking system has a locking unit (21) which is slidably arranged in a longitudinal manner in a telescopic cylinder (10). A locking is manufactured between the telescopic cylinder and the telescopic components (1,2,3,4) for ejecting and retracting the telescopic components by the locking unit.

Description

Die Erfindung betrifft ein Verriegelungssystem für einen Teleskopkranausleger, insbesondere für einen Mobilkran.The invention relates to a locking system for a telescopic crane boom, in particular for a mobile crane.

Bei solchen Kranen bzw. Teleskopauslegern ist ein Teleskopierzylinder zum Verfahren mehrere Teleskopteile vorgesehen, der eine Verriegelungseinheit aufweist. Diese Verriegelungseinheit wiederum dient zu Herstellung einer Verriegelung zwischen dem Teleskopierzylinder und einem der Teleskopteile, das gerade aus- oder eingefahren werden soll.In such cranes or telescopic jibs, a telescoping cylinder for the method is provided a plurality of telescopic parts, which has a locking unit. This locking unit in turn serves to produce a lock between the telescoping cylinder and one of the telescopic parts that is about to extend or retract.

Die vorliegende Erfindung befasst sich mit einem Teleskopausleger, bei dem ein Teleskopierzylinder Auslegerteile ausfährt und verriegelt. Moderne Mobilkrane werden zum Heben von immer schwereren Lasten auf immer größeren Höhen eingesetzt. Ebenso steigt der Anspruch der Verwender, einen leistungsfähigen Mobilkran mit möglichst geringem Eigengewicht einzusetzen, um Kosten für Logistik zu sparen. Weiterhin wird angestrebt, einen Mobilkran mit möglichst hoher Traglast auf möglichst wenigen Achsen innerhalb der zulässigen Achslasten zu bekommen, was sich zum einen günstig auf die Wendigkeit und zum anderen senkend auf die Gesamtkosten des Kranes auswirkt. Der Teleskopausleger ist ein Kernelement des Mobilkranes; er bestimmt maximale Hubhöhe und Tragkraft. Die Auslegerlänge wird von Anzahl und Länge der einzelnen Teleskopteile bestimmt. Aus statischen Gründen müssen die einzelnen Teleskopteile im ausgefahrenen Zustand eine Überlappung behalten, damit der Kraftschluss senkrecht zur Auslegerrichtung untereinander sichergestellt wird. Der Kraftschluss in Auslegerrichtung wird durch die Verriegelung der Teleskope erreicht. Bauartbedingt können die Teleskopteile im eingefahrenen Zustand nicht vollständig ineinander zurückgezogen werden. Am vorderen Ende befinden sich zur Aussteifung der Teleskopteile Kragenteile, die außen überstehen. Weiterhin sind die Verriegelungspunkte für die Televerriegelung in Längsrichtung voreinander angeordnet. Damit der Teleskopierzylinder mit einem Teleskopteil verriegelt werden kann, muss also ein Weg in Längsrichtung des Auslegers zurückgelegt werden, um die Verriegelungseinheit auf eine Höhe mit dem zu verriegelnden Teleskop zu bringen. Nach dem Stand der Technik muss der Teleskopierzylinder mitsamt der Verriegelungseinheit für jedes Teleskopteil entsprechend ein Stück ausgefahren werden und verliert dadurch einen Teil seines Gesamthubes. Darum können die vorderen Teleskopteile unter Berücksichtigung des Gesamthubes vom Teleskopierzylinder nicht so weit ausgefahren werden wie die hinteren. Hieraus ergibt sich eine unnötig große Überlappung der vorderen Teleskopteile im ausgefahrenen Zustand und ein damit verbundener Verlust an Auslegergesamtlänge.The present invention relates to a telescopic boom in which a telescoping cylinder extends and locks boom parts. Modern mobile cranes are used to lift increasingly heavy loads at ever-increasing heights. Likewise, the claim of users to use a high-performance mobile crane with as little dead weight as possible in order to save on logistics costs is increasing. Furthermore, the aim is to get a mobile crane with the highest possible load on as few axles within the permissible axle loads, which on the one hand has a favorable effect on the maneuverability and on the other lowering on the total cost of the crane. The telescopic boom is a core element of the mobile crane; It determines maximum lifting height and carrying capacity. The boom length is determined by the number and length of the individual telescope parts. For static reasons, the individual telescope parts must keep an overlap in the extended state, so that the frictional connection perpendicular to the boom direction is ensured with each other. The traction in the boom direction is achieved by the locking of the telescopes. Due to the design, the telescopic parts in the retracted state can not be completely retracted into each other. At the front end are to stiffen the telescopic parts collar parts that survive outside. Furthermore, the locking points for the telelocking are arranged longitudinally in front of each other. Thus, the telescoping cylinder can be locked with a telescopic part, so a path in the longitudinal direction of the boom must be covered to bring the locking unit at a height with the telescope to be locked. According to the prior art, the telescoping cylinder must be extended together with the locking unit for each telescopic part according to a piece and thereby loses part of its total stroke. Therefore, taking into account the total stroke of the telescopic cylinder, the front telescopic parts can not be extended as far as the rear ones. This results in an unnecessarily large overlap of the front telescopic parts in the extended state and an associated loss of boom overall length.

Es ist die Aufgabe der vorliegenden Erfindung, ein Verriegelungssystem für einen Teleskopkranausleger zu schaffen, welches das Ein- bzw. Austeleskopieren der Teleskopteile (Schüsse) optimiert, insbesondere in Hinsicht auf die ausfahrbare Länge.It is the object of the present invention to provide a locking system for a telescopic crane jib which optimizes the telescoping or telescoping of the telescopic parts (shots), in particular with regard to the extendable length.

Diese Aufgabe wird erfindungsgemäß durch ein Verriegelungssystem gemäß dem Anspruch 1 gelöst. Die Unteransprüche definieren bevorzugte Ausführungsformen der Erfindung.This object is achieved by a locking system according to claim 1. The subclaims define preferred embodiments of the invention.

Erfindungsgemäß wird die Verriegelungseinheit am Teleskopierzylinder längs verschiebbar angeordnet. Mit anderen Worten werden die Stellung des Teleskopierzylinders und die Stellung der Verriegelungseinheit, die einander gemäß dem Stand der Technik immer bedingten, voneinander entkoppelt. Auf diese Weise lässt sich grundsätzlich ohne eine Bewegung des Teleskopierzylinders oder sogar entgegen einer anders gerichteten Bewegung des Teleskopierzylinders ein Verriegelungspunkt durch die Verriegelungseinrichtung anfahren, was die Funktionalität wesentlich erhöht und Einschränkungen in der Arbeitsweise bzw. Betriebsweise stark vermindert oder eliminiert. Insbesondere ist der Weg, den die Verriegelungseinheit fahren kann bzw. der Ort, den die Verriegelungseinheit erreichen kann, nicht mehr durch die Verfahrbarkeit des Teleskopierzylinders oder dessen Anordnungsfreiheit eingeschränkt. Dadurch kann zusätzlicher Teleskopierweg gewonnen bzw. Länge am Teleskopierzylinder eingespart werden, was insgesamt wiederum Auslegergewicht einspart und damit den Kran als Ganzes optimiert.According to the invention the locking unit is arranged longitudinally displaceable on the telescoping cylinder. In other words, the position of the telescoping cylinder and the position of the locking unit, which always caused each other according to the prior art, are decoupled from each other. In principle, this can be achieved without a movement of the telescoping cylinder or even against a movement of the telescoping cylinder in a different direction Approach locking point by the locking device, which significantly increases the functionality and greatly reduced or eliminated restrictions on the operation or mode of operation. In particular, the path that the locking unit can travel or the location that the locking unit can reach is no longer limited by the movability of the telescoping cylinder or its arrangement freedom. As a result, additional Teleskopierweg won or length can be saved on the telescoping cylinder, which in turn saves overall boom weight and thus optimizes the crane as a whole.

Es besteht erfindungsgemäß die Möglichkeit, die Verriegelungseinheit am Teleskopierzylinder fixierbar anzuordnen, insbesondere in jeder Stellung fixierbar. Sie kann ferner als zweite Stufe am Teleskopierzylinder ausgestaltet oder an einer zweiten Stufe des Teleskopierzylinders angeordnet sein. Vorteilhafterweise ist auch mindestens ein Längenmessgerät bzw. ein Längengeber vorgesehen, der die Position von Verriegelungseinheit und Teleskopierzylinder erfassen kann, insbesondere die Relativposition der beiden oder deren absolute Positionen. Erfindungsgemäß und speziell mit einer derartigen Ausgestaltung kann dann, nachdem die richtige Position der Verriegelungseinheit gefunden und diese mit dem entsprechenden Teleskop verriegelt wurde, beispielsweise ein Sitzventil geschlossen und mit die Zylinderstufe der Verriegelungseinheit fixiert werden. Hierauf kann die Stahbauverriegelung zum nächsten Teleskopteil gelöst werden, und der Teleskopierzylinder kann das gerade mit der Verriegelungseinheit in Eingriff genommene Teleskopteil ausfahren, wobei der vollständige Hub des Teleskopierzylinders zur Verfügung steht.According to the invention, it is possible to arrange the locking unit in a fixable manner on the telescopic cylinder, in particular fixable in any position. It can also be designed as a second stage on the telescoping cylinder or arranged on a second stage of the telescoping cylinder. Advantageously, at least one length measuring device or a length transmitter is provided, which can detect the position of locking unit and telescoping cylinder, in particular the relative position of the two or their absolute positions. According to the invention and especially with such a configuration can then, after the correct position of the locking unit found and this was locked with the corresponding telescope, for example, a seat valve is closed and fixed with the cylinder stage of the locking unit. Then the steel construction lock to the next telescopic part can be solved, and the telescoping cylinder can extend the just engaged with the locking unit engaged telescope part, the full stroke of the telescoping cylinder is available.

Das Bewegen der Verriegelungseinheit, insbesondere der zweiten Stufe des Teleskopierzylinders mit der darauf befindlichen Verriegelungseinheit, erfolgt nach einer erfindungsgemäßen Ausgestaltung im kraftlosen, entriegelten Zustand des Teleskopierzylinders, und entsprechend werden zum Verschieben nur geringe Kräfte benötigt, die von der hydraulischen Versorgung aus der Zylinderdurchführung zum Ausfahren aufgebracht werden können, wenn die Verriegelungseinheit - gemäß einer erfindungsgemäßen Ausführungsvariante - durch hydraulische Beaufschlagung am Teleskopierzylinder verfahrbar ist.Moving the locking unit, in particular the second stage of Teleskopierzylinders with the locking unit thereon, is carried out according to an embodiment of the invention in the powerless unlocked state of Teleskopierzylinders, and accordingly only small forces are required for moving, from the hydraulic supply from the cylinder bushing for extending can be applied when the locking unit - according to a variant according to the invention - can be moved by hydraulic loading on Teleskopierzylinder.

Eine Hydraulikschaltung kann vorgesehen werden, welche eine Betätigung und/oder Fixierung der verschiebbaren Verriegelungseinheit in Verbindung mit der Ausfahrhydraulik des Teleskopierzylinders steuert. Das Einfahren erfolgt dann vorzugsweise durch eine entsperrbare Verbindung zur Ringseite des Teleskopierzylinders. Mit dem Verriegelungssystem gemäß der vorliegenden Erfindung kann der Gesamthub eines Austeleskopiersystems zwischen der Verschiebung der Verriegelungseinheit und dem Teleskopweg des Teleskopierzylinders aufgeteilt werden, d.h. der Teleskopierzylinder kann grundsätzlich verkürzt werden oder der Gesamthub kann gesteigert werden, ohne den Teleskopierzylinder verlängern zu müssen.A hydraulic circuit can be provided, which controls an actuation and / or fixation of the displaceable locking unit in conjunction with the extension hydraulics of the telescoping cylinder. The retraction is then preferably by a releasable connection to the ring side of Teleskopierzylinders. With the locking system according to the present invention, the total stroke of an exporting copying system can be divided between the displacement of the locking unit and the telescoping path of the telescoping cylinder, i. the telescopic cylinder can be shortened in principle or the total stroke can be increased without having to extend the telescoping cylinder.

Die Verriegelungseinheit ist gemäß einer Ausführungsform um einen Weg am Teleskopierzylinder verschiebbar, der mindestens dem Abstand aller Teleskopausleger-Entriegelungen im eingefahrenen Zustand des Auslegers entspricht. Andererseits besteht die Möglichkeit, die Verriegelungseinheit um mehr als den genannten Abstand verschiebbar zu machen, so dass die Verschiebung den Hub des Teleskopierzylinders zum oben schon genannten Zweck ergänzt oder mindestens teilweise ersetzt.The locking unit is displaceable according to an embodiment by a distance on the telescoping cylinder, which corresponds to at least the distance of all telescopic boom unlockings in the retracted state of the boom. On the other hand, it is possible to make the locking unit displaced by more than said distance, so that the displacement complements or at least partially replaces the stroke of the telescoping cylinder for the purpose already mentioned above.

Die Erfindung wird im Weiteren anhand von Ausführungsbeispielen und unter Bezugnahme auf die beiliegenden Zeichnungen näher erläutert. Sie kann alle hierin beschriebenen Merkmale einzeln sowie in jedweder sinnvollen Kombination umfassen und grundsätzlich auch als Verfahren zum Ein- und Austeleskopieren eines Teleskopkranauslegers sowie als Verwendung der aufgezeigten Vorrichtungen zu diesem Zweck aufgefasst und bezeichnet werden. In den Zeichnungen zeigen:

Figur 1
eine schematische Längsschnittansicht eines Teleskopauslegers mit Teleskopierzylinder und erfindungsgemäßem Verriegelungssystem und;
Figur 2
eine schematische, schaltplanartige Skizze, welche die Ansteuerung eines erfindungsgemäßen Verriegelungssystems sowie deren Hydraulikversorgung erläutert.
The invention will be explained in more detail by means of embodiments and with reference to the accompanying drawings. It may comprise all the features described herein individually and in any meaningful combination, and in principle may be construed and referred to as a method of telescoping and telescoping a telescopic crane jib and using the disclosed devices for this purpose. In the drawings show:
FIG. 1
a schematic longitudinal sectional view of a telescopic boom with telescoping cylinder and inventive locking system and;
FIG. 2
a schematic, schematic diagram, which explains the activation of a locking system according to the invention and the hydraulic supply.

Ein erfindungsgemäßes Ausführungsbeispiel wird nun zunächst anhand der Figur 1 näher erläutert. In einer schematischen Längsschnittansicht ist dort ein Teleskopausleger gezeigt, der einen Grundkörper 11 und vier ausfahrbare Teleskopteile 1 bis 4 umfasst. Im Grundkörper 11 befindet sich der Teleskopierzylinder 10. Auf dem äußeren Zylinderrohr des Teleskopierzylinders 10 läuft die Verriegelungseinheit 21, die aus einer zweiten Zylinderstufe 6 und der Zylinderverriegelung 5 besteht. Die zweite Zylinderstufe 6 liegt über dem hier separat dargestellten Außenrohr 8 des Teleskopierzylinders 10. Außerdem ist am Teleskopierzylinder 10 noch die Betätigung 7 für die Stahlbauverriegelung 9 angeordnet, welche die einzelnen Teleskopteile untereinander verriegelt, wenn sie in einen Betriebszustand gebracht worden sind.An inventive embodiment will now be based on the first FIG. 1 explained in more detail. In a schematic longitudinal sectional view, there is shown a telescopic boom which comprises a main body 11 and four extendable telescopic parts 1 to 4. In the base body 11 is the telescopic cylinder 10. On the outer cylinder tube of the telescoping cylinder 10 runs the locking unit 21, which consists of a second cylinder stage 6 and the cylinder lock 5. The second cylinder stage 6 is located above the outer tube 8 of the telescoping cylinder 10, which is shown separately here. In addition, the actuation 7 for the steel construction lock 9 is arranged on the telescoping cylinder 10, which locks the individual telescope parts to one another when they have been brought into an operating state.

Das Austeleskopieren läuft bei einer derartigen Ausführungsform nun - insbesondere automatisch - in nachstehend beschriebener Reihenfolge ab:In such an embodiment, exporting takes place-in particular automatically-in the order described below:

Alle Teleskopteile 1 bis 4 sind anfangs eingefahren und untereinander verriegelt (Stahlbauverrieglung 9). Nunmehr fährt die zweite Stufe 6 in das Fußstück des Teleskops 4 und wird dort in der hiefür vorgesehenen Einriegelung (Ausnehmung) verriegelt. Die Stahlbauverriegelung 9 zum Teleskop 3 wird gelöst, und der Teleskopierzylinder 10 fährt mit dem Teleskop 4 maximal aus, um es dort mit dem Teleskop 3 zu verriegeln. Daraufhin wird die Zylinderverrieglung 5 gelöst und der Teleskopierzylinder 10 komplett eingefahren. Jetzt wird die zweite Zylinderstufe 6 soweit eingefahren, bis das Fußstück vom Teleskop 3 erreicht wird, um sich dort zu verriegeln. Auf diese Weise können nacheinander alle Teleskopteile 1 bis 4 ausgefahren werden.All telescopic parts 1 to 4 are initially retracted and locked together (Stahlbauverrieglung 9). Now moves the second stage 6 in the foot of the telescope 4 and is there in the door provided for locking (recess) locked. The steel construction lock 9 to the telescope 3 is released, and the telescoping cylinder 10 moves with the telescope 4 maximum, to lock it there with the telescope 3. Then the cylinder lock 5 is released and the telescoping cylinder 10 completely retracted. Now the second cylinder stage 6 is retracted so far, until the foot piece is reached by the telescope 3 to lock there. In this way, all telescope parts 1 to 4 can be extended one after the other.

Das Einteleskopieren läuft erfindungsgemäß - ebenso insbesondere automatisch - in nachstehend beschriebener Reihenfolge ab:

  • Alle Teleskopteile 1 bis 4 sind ausgefahren und verriegelt. Der Teleskopierzylinder 10 ist komplett ausgefahren, und die Zylinderverriegelung 5 ist mit dem Fußstück des Teleskopteils 1 verriegelt. Die Stahlbauverriegelung des Teleskopteils 1 zum Grundkörper 11 hin wird entriegelt. Das Teleskopteil 1 wird mit dem Teleskopierzylinder 10 komplett eingefahren und danach mit dem Grundkörper 11 verriegelt. Der Teleskopierzylinder 10 wird entriegelt und komplett ausgefahren. Jetzt wird die zweite Zylinderstufe 6 ausgefahren, bis das Fußstück vom Teleskopteil 2 erreicht wird, um sich dort zu verriegeln. So können nacheinander alle Teleskopteile eingefahren werden.
The Einteleskopieren according to the invention runs - also in particular automatically - in the order described below from:
  • All telescopic parts 1 to 4 are extended and locked. The telescoping cylinder 10 is fully extended, and the cylinder lock 5 is locked to the foot of the telescopic part 1. The steel construction lock of the telescopic part 1 to the main body 11 back is unlocked. The telescopic part 1 is completely retracted with the telescoping cylinder 10 and then locked with the base body 11. The telescoping cylinder 10 is unlocked and completely extended. Now the second cylinder stage 6 is extended until the foot piece is reached by the telescopic part 2 in order to lock there. So all telescope parts can be retracted one after the other.

Am Beispiel des Teleskopteils 4 kann nun der Längenvorteil des im Vergleich der vorliegenden Erfindung mit dem Stand der Technik erläutert werden. Die ausfahrbare Länge des Teleskopteils 4 ist dank verschiebbarer Verriegelungseinheit 21 gleich der Länge Tges. Gemäß dem Stand der Technik wäre die Länge um ΔT4 verkürzt, während bei der vorliegenden Erfindung eine Verlängerung des gesamten Auslegers im ausgefahrenen Zustand um die Summe aller dargestellten ΔST stattfinden kann. Bei steigender Anzahl der Teleskopteile vergrößert sich somit auch der Längenvorteil gegenüber Ausführungsformen gemäß dem Stand der Technik. Bei einer einheitlichen Ausführungsvariante kann die Verriegelungseinheit 21 so weit verschiebbar gestaltet werden, dass der Hub des Teleskopierzylinders 10 nicht mehr dem fahrbaren Weg des Teleskopteils entsprechen muss. Dabei teilen sich Teleskopierzylinder 10 und Verriegelungseinheit 21 den Gesamthub eines Teleskopteils 1 bis 4, und somit kann die Gesamtlänge des Teleskopierzylinders 10 deutlich verkürzt werden.Using the example of the telescopic part 4, the length advantage of the comparison of the present invention with the prior art can now be explained. The extendable length of the telescopic part 4 is thanks to sliding locking unit 21 equal to the length Tges. According to the prior art, the length would be shortened by ΔT4, whereas in the present invention an extension of the entire boom in the extended state may take place by the sum of all illustrated ΔST. As the number of telescopic parts increases, so does the length advantage over embodiments according to the prior art. In a uniform embodiment, the locking unit 21 can be made so far displaced that the stroke of the telescoping cylinder 10 no longer has to correspond to the mobile way of the telescope part. In this case, telescoping cylinder 10 and locking unit 21 share the total stroke of a telescopic part 1 to 4, and thus the total length of the telescoping cylinder 10 can be significantly shortened.

Mit Hilfe der schaltplanartigen Schemadarstellung der Figur 2 wird nunmehr die Betätigung bzw. Hydraulikversorgung einer erfindungsgemäßen Ausführungsvariante erläutert. Bei der dargestellten Ausführungsform besteht die zweite Stufe des Teleskopierzylinders 20 aus dem Zylinderrohr 26, welches des äußere Zylinderrohr des eigentlichen Teleskopierzylinders 20 umschließt. Die Ölvolumen 30 und 31 stützen sich auf den Ring 32, der fest mit dem Teleskopierzylinder 20 verbunden ist (oder einen Teil von diesem bilden kann).With the help of the schematic diagram of the schematic FIG. 2 now the operation or hydraulic supply of an embodiment of the invention will be explained. In the illustrated embodiment, the second stage of Teleskopierzylinders 20 from the cylinder tube 26, which is the outer cylinder tube encloses the actual telescoping cylinder 20. The oil volumes 30 and 31 are based on the ring 32 fixedly connected to (or part of) the telescoping cylinder 20.

Die Zylinderdurchführung 35 dient der hydraulischen Versorgung der Ventileinheit 28. Von hier aus wird die Versorgung je nach Bedarf auf die Zylinderverriegelung 25, die Stahlbauverriegelung 29 oder zweite Zylinderstufe 26 geschaltet, um die gesamte Verriegelungseinheit 21 zu verschieben. Zum Ausschieben in Fahrtrichtung wird die lastabgewandte Ringseite 31 mit der entlasteten Ringseite 27 des Teleskopierzylinders 20 verbunden. Weiterhin wird die Lastseite 30 mit der druckbeaufschlagten Zylinderdurchführung 35 verbunden. Ein entsperrbares Rückschlagventil 22 verhindert das ungewollte Zurückfahren der Verriegelungseinheit 21.The cylinder feedthrough 35 serves to hydraulically supply the valve unit 28. From here, the supply is switched as required to the cylinder lock 25, the steel construction lock 29 or second cylinder stage 26 in order to displace the entire locking unit 21. To push out in the direction of travel, the load-facing side of the ring 31 is connected to the relieved ring side 27 of the Teleskopierzylinders 20. Furthermore, the load side 30 is connected to the pressurized cylinder duct 35. A pilot-operated check valve 22 prevents the unwanted retraction of the locking unit 21.

Zum Einfahren wird der lastseitige Ringraum 30 der Verriegelungseinheit 21 mit der entlasteten Zylinderdurchführung 35 verbunden. Ferner wird der lastabgewandte Ringraum 31 mit der druckbeaufschlagten Seite 27 des Teleskopierzylinders 20 verbunden und dadurch das entsperrbare Rückschlagventil 22 geöffnet.For retraction, the load-side annular space 30 of the locking unit 21 is connected to the unloaded cylinder duct 35. Furthermore, the load-facing annular space 31 is connected to the pressurized side 27 of the telescoping cylinder 20 and thereby the pilot-operated check valve 22 is opened.

Claims (11)

Verriegelungssystem für einen Teleskopkranausleger, insbesondere für einen Mobilkran, bei dem zum Ausschieben und Einfahren der Teleskopteile mittels einer Verriegelungseinheit (21) eine Verriegelung zwischen einem Teleskopierzylinder (10, 20) und einem Teleskopteil (1-4) hergestellt wird, dadurch gekennzeichnet, dass die Verriegelungseinheit (21) am Teleskopierzylinder (10, 20) längs verschiebbar angeordnet ist.Locking system for a telescopic crane boom, in particular for a mobile crane, in which for locking and retracting the telescopic parts by means of a locking unit (21) locking between a telescoping cylinder (10, 20) and a telescopic part (1-4) is produced, characterized in that the Locking unit (21) on the telescoping cylinder (10, 20) is arranged longitudinally displaceable. Verriegelungssystem nach Anspruch 1, dadurch gekennzeichnet, dass die Verriegelungseinheit (21) am Teleskopierzylinder (10, 20) fixierbar angeordnet ist, insbesondere in jeder Stellung fixierbar.Locking system according to claim 1, characterized in that the locking unit (21) on the telescoping cylinder (10, 20) is arranged fixed, in particular fixable in any position. Verriegelungssystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Verriegelungseinheit (21) als zweite Stufe (6) am Teleskopierzylinder (10, 20) ausgestaltet oder an einer zweiten Stufe (6) des Teleskopierzylinders (10, 20) angeordnet ist.Locking system according to claim 1 or 2, characterized in that the locking unit (21) as a second stage (6) on the telescoping cylinder (10, 20) designed or arranged on a second stage (6) of the Teleskopierzylinders (10, 20). Verriegelungssystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Gesamthub eines Austeleskopiersystems aufgeteilt wird zwischen der Verschiebung der Verriegelungseinheit (21) und dem Teleskopweg des Teleskopierzylinders (10, 20).A locking system according to one of claims 1 to 3, characterized in that the total stroke of a Austeleskopiersystems is divided between the displacement of the locking unit (21) and the Teleskopweg of the telescoping cylinder (10, 20). Verriegelungssystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Verriegelungseinheit (21) um einen Weg am Teleskopierzylinder (10, 20) verschiebbar ist, der mindestens dem Abstand (h4) aller Teleskopausleger-Einriegelungen im eingefahrenen Zustand des Auslegers entspricht.Locking system according to one of claims 1 to 4, characterized in that the locking unit (21) about a path on the telescoping cylinder (10, 20) is displaceable, which corresponds to at least the distance (h4) of all telescopic boom locks in the retracted state of the boom. Verriegelungssystem nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Verriegelungseinheit (21) um mehr als den Abstand (h4) aller Teleskopausleger-Einriegelungen im eingefahrenen Zustand des Auslegers verschiebbar ist, so dass die Verschiebung den Hub des Teleskopierzylinders (10, 20) ergänzt oder mindestens teilweise ersetzt.Locking system according to one of claims 1 to 5, characterized in that the locking unit (21) is displaceable by more than the distance (h4) of all telescopic boom locking in the retracted state of the boom, so that the displacement of the lifting of the telescoping cylinder (10, 20 ) or at least partially replaced. Verriegelungssystem nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass mindestens ein Längenmessgerät bzw. Längengeber vorgesehen ist, der die Position von Verriegelungseinheit (21) und Teleskopierzylinder (10, 20) erfasst.Locking system according to one of claims 1 to 6, characterized in that at least one length measuring device or length sensor is provided which detects the position of the locking unit (21) and telescoping cylinder (10, 20). Verriegelungssystem nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Verriegelungseinheit (21) durch hydraulische Beaufschlagung (30, 31) am Teleskopierzylinder (10, 20) verfahrbar ist.Locking system according to one of claims 1 to 7, characterized in that the locking unit (21) by hydraulic loading (30, 31) on the telescoping cylinder (10, 20) is movable. Verriegelungssystem nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Verriegelungseinheit (21) am Teleskopierzylinder (10, 20) mittels einer hydraulisch unterstützten, durch ein Sitzventil gesteuerten Fixierung fixierbar ist.Locking system according to one of claims 1 to 8, characterized in that the locking unit (21) on the telescopic cylinder (10, 20) by means of a hydraulically assisted, controlled by a seat valve fixation is fixed. Verriegelungssystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine Hydraulikschaltung vorgesehen ist, welche eine Betätigung und/oder Fixierung der verschiebbaren Verriegelungseinheit (21) in Verbindung mit der Ausfahrhydraulik des Teleskopierzylinders (10, 20) steuert.Locking system according to one of claims 1 to 3, characterized in that a hydraulic circuit is provided, which controls an actuation and / or fixing of the displaceable locking unit (21) in conjunction with the Ausfahrhydraulik of Teleskopierzylinders (10, 20). Verriegelungssystem nach Anspruch 10, dadurch gekennzeichnet, dass die Hydraulikschaltung und die Hydraulikversorgung eine Öldurchführung (35) des Teleskopierzylinders (10, 20), und insbesondere auch eine elektrisch abschaltbare Verbindung zur Stangenseite des Teleskopauslegers verwendet.Locking system according to claim 10, characterized in that the hydraulic circuit and the hydraulic supply an oil passage (35) of the telescoping cylinder (10, 20), and in particular also uses an electrically disconnectable connection to the rod side of the telescopic boom.
EP09176745.9A 2009-01-27 2009-11-23 Locking system for telescopic crane boom with displaceable locking unit Active EP2210853B1 (en)

Applications Claiming Priority (1)

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DE200910006292 DE102009006292B4 (en) 2009-01-27 2009-01-27 Locking system for telescopic crane jib with sliding locking unit

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EP2210853A3 EP2210853A3 (en) 2011-06-08
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US (1) US9085443B2 (en)
EP (1) EP2210853B1 (en)
JP (1) JP5190046B2 (en)
KR (1) KR101278122B1 (en)
CN (1) CN101786578B (en)
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DE102009006292B4 (en) 2015-03-26
KR101278122B1 (en) 2013-06-24
CN101786578A (en) 2010-07-28
DE102009006292A1 (en) 2010-08-12
CA2686361A1 (en) 2010-07-27
US20100187194A1 (en) 2010-07-29
KR20100087652A (en) 2010-08-05
EP2210853A3 (en) 2011-06-08
US9085443B2 (en) 2015-07-21
EP2210853B1 (en) 2016-01-27
JP5190046B2 (en) 2013-04-24
CN101786578B (en) 2014-12-24
JP2010173855A (en) 2010-08-12
CA2686361C (en) 2014-11-25

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