EP2210853B1 - 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
EP2210853B1
EP2210853B1 EP09176745.9A EP09176745A EP2210853B1 EP 2210853 B1 EP2210853 B1 EP 2210853B1 EP 09176745 A EP09176745 A EP 09176745A EP 2210853 B1 EP2210853 B1 EP 2210853B1
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EP
European Patent Office
Prior art keywords
telescoping cylinder
locking unit
telescopic
locking
cylinder
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EP09176745.9A
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German (de)
French (fr)
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EP2210853A3 (en
EP2210853A2 (en
Inventor
Johannes Schürmann
Dieter Stührwoldt
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Manitowoc Crane Group France SAS
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Manitowoc Crane Group France SAS
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    • 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 increases costs for logistics to save.
  • 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 is ensured perpendicular to the boom direction 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.
  • 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.
  • the locking unit can be fixed to the telescopic cylinder in any position. arranged.
  • 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.
  • a seat valve is closed and fixed with the cylinder stage of the locking unit.
  • the steel construction lock can be solved to the next telescope part, 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 an embodiment variant according to the invention - by hydraulic loading on the telescoping cylinder is movable.
  • 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 telescoping 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.
  • 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 ⁇ T shown.
  • the locking unit 21 can be designed so far displaced that the stroke of the telescoping cylinder 10 is no longer must 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 the telescoping cylinder 20 consists of the cylinder tube 26, which encloses the outer cylinder tube of 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 is used for the hydraulic supply to the valve unit 28. From here, the supply is switched as needed to the cylinder lock 25, the steel lock 29 or second cylinder stage 26 to move 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

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.

Aus der US 6,527,131 B1 ist ein Teleskopausleger für einen Kran bekannt, dessen Teleskopschüsse mittels eines Teleskopierzylinders in zwei Hüben ein- und wieder austeleskopiert werden.From the US 6,527,131 B1 is a telescopic boom for a crane known, the telescopic shots by means of a Teleskopierzylinders in two strokes on and austeleskopiert again.

Aus der DE 10 142 847 C1 ist ein Teleskopausleger für einen Mobilkran bekannt, wobei ein hydraulisches Zylinder/Kolben-System als ein zwei ausfahrbare Teile aufweisendes zweistufiges Zylinder/Kolben-System ausgeführt ist.From the DE 10 142 847 C1 is a telescopic boom for a mobile crane is known, wherein a hydraulic cylinder / piston system is designed as a two-extendable parts having two-stage cylinder / piston system.

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 increases costs for logistics to save. 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 is ensured perpendicular to the boom direction 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 this way, in principle without a movement of the telescoping cylinder or even against a different direction of movement of the telescoping cylinder approach a locking point through the locking device, which significantly increases the functionality and greatly reduced or eliminated restrictions in 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.

Die Verriegelungseinheit ist am Teleskopierzylinder in jeder Stellung fixierbar. angeordnet.The locking unit can be fixed to the telescopic cylinder in any position. arranged.

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.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 can be solved to the next telescope part, 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 an embodiment variant according to the invention - by hydraulic loading on the telescoping cylinder is movable.

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.The invention will be explained in more detail by means of embodiments and with reference to the accompanying drawings.

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.
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 telescoping 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:

  • 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.
In such an embodiment, 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 locked there in the space provided for this purpose (recess). 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 ΔT 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 ΔT shown. 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 designed so far displaced that the stroke of the telescoping cylinder 10 is no longer must 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 the telescoping cylinder 20 consists of the cylinder tube 26, which encloses the outer cylinder tube of 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 is used for the hydraulic supply to the valve unit 28. From here, the supply is switched as needed to the cylinder lock 25, the steel lock 29 or second cylinder stage 26 to move 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 (8)

  1. A locking system for a telescopic crane jib, in particular for a mobile crane, in which a lock is established between a telescoping cylinder (10, 20) and a telescopic part (1-4) by means of a locking unit (21) in order to extend and retract the telescopic parts, wherein the locking unit (21): is arranged on the telescoping cylinder (10, 20) in such a way that it can be shifted longitudinally; moves on the outer cylinder tube of the telescoping cylinder (10, 20); and comprises a second cylinder stage of the telescoping cylinder (10, 20) and a cylinder lock (5); characterised in that the locking unit (21) is arranged on the telescoping cylinder (10, 20) in such a way that it can fixed in any position of the locking unit (21), and in that the total lift of a telescopically extending system is divided between the shift of the locking unit (21) and the telescopic path of the telescoping cylinder (10, 20).
  2. The locking system according to Claim 1, characterised in that the locking unit (21) can be shifted on the telescoping cylinder (10, 20) by a path which corresponds to at least the distance (h4) between all the telescopic jib latches when the jib is retracted.
  3. The locking system according to any one of Claims 1 or 2, characterised in that the locking unit (21) can be shifted by more than the distance (h4) between all the telescopic jib latches when the jib is retracted, such that the shift supplements or at least partially replaces the stroke of the telescoping cylinder (10, 20).
  4. The locking system according to any one of Claims 1 to 3, characterised in that at least one length measuring device or length sensor which detects the position of the locking unit (21) and the telescoping cylinder (10, 20).
  5. The locking system according to any one of Claims 1 to 4, characterised in that the locking unit (21) can be moved on the telescoping cylinder (10, 20) by the application of hydraulic pressure (30, 31).
  6. The locking system according to any one of Claims 1 to 5, characterised in that the locking unit (21) can be fixed on the telescoping cylinder (10, 20) by means of a hydraulically assisted fixation controlled by a seated valve.
  7. The locking system according to any one of Claims 1 to 6, characterised in that a hydraulic switch is provided which controls operating and/or fixing the shifting locking unit (21) in conjunction with the extending hydraulics of the telescoping cylinder (10, 20).
  8. The locking system according to Claim 7, characterised in that the hydraulic switch and the hydraulic supply use an oil duct (35) of the telescoping cylinder (10, 20) and in particular also a connection to the rod side of the telescopic jib which can be disconnected electrically.
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)

Application Number Priority Date Filing Date Title
DE200910006292 DE102009006292B4 (en) 2009-01-27 2009-01-27 Locking system for telescopic crane jib with sliding locking unit

Publications (3)

Publication Number Publication Date
EP2210853A2 EP2210853A2 (en) 2010-07-28
EP2210853A3 EP2210853A3 (en) 2011-06-08
EP2210853B1 true EP2210853B1 (en) 2016-01-27

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EP09176745.9A Active EP2210853B1 (en) 2009-01-27 2009-11-23 Locking system for telescopic crane boom with displaceable locking unit

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US (1) US9085443B2 (en)
EP (1) EP2210853B1 (en)
JP (1) JP5190046B2 (en)
KR (1) KR101278122B1 (en)
CN (1) CN101786578B (en)
CA (1) CA2686361C (en)
DE (1) DE102009006292B4 (en)

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EP4357292A1 (en) 2022-10-21 2024-04-24 Oleodinamica Panni S.R.L. A blocking unit for telescopic systems, a hydraulic cylinder and a telescopic system

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CN102849631B (en) * 2011-06-29 2015-12-16 三一汽车起重机械有限公司 A kind of single-cylinder bolt type telescopic boom is emergent receives arm method and device
CN102602810B (en) * 2012-03-26 2013-07-24 中联重科股份有限公司 Control device, method and system of telescopic boom and engineering mechanical equipment
DE102013011173B4 (en) * 2013-07-04 2019-05-23 Liebherr-Werk Ehingen Gmbh Method for assembling a crane as well as articulation, telescopic boom and crane
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KR101787370B1 (en) 2015-02-03 2017-10-20 한국생산기술연구원 The crane head with side pin
KR101715122B1 (en) * 2015-02-03 2017-03-14 한국생산기술연구원 The crane head with safety pin
WO2017189439A1 (en) 2016-04-25 2017-11-02 Manitowoc Crane Companies, Llc Crane with rotary locking mechanism
US11111115B2 (en) 2017-03-02 2021-09-07 Maniitowoc Crane Companies, LLC Wear pad with insert for telescoping boom assembly
WO2019062680A1 (en) * 2017-09-30 2019-04-04 陈奕松 Locking device for telescopic boom, telescopic boom, crane, and extension/retraction locking method thereof
JP7445394B2 (en) 2018-06-04 2024-03-07 マニタウォック クレイン カンパニーズ， エルエルシー Telescopic boom with rotary extension and locking system
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CN113896121A (en) * 2021-10-08 2022-01-07 徐州重型机械有限公司 Crane bolt type telescopic system and crane
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Also Published As

Publication number Publication date
KR101278122B1 (en) 2013-06-24
EP2210853A3 (en) 2011-06-08
US20100187194A1 (en) 2010-07-29
CN101786578A (en) 2010-07-28
DE102009006292B4 (en) 2015-03-26
US9085443B2 (en) 2015-07-21
JP2010173855A (en) 2010-08-12
KR20100087652A (en) 2010-08-05
CA2686361C (en) 2014-11-25
JP5190046B2 (en) 2013-04-24
CN101786578B (en) 2014-12-24
CA2686361A1 (en) 2010-07-27
DE102009006292A1 (en) 2010-08-12
EP2210853A2 (en) 2010-07-28

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