EP0460475A1 - Telescopic jib with coupling device for extension mechanism - Google Patents

Telescopic jib with coupling device for extension mechanism Download PDF

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Publication number
EP0460475A1
EP0460475A1 EP91108505A EP91108505A EP0460475A1 EP 0460475 A1 EP0460475 A1 EP 0460475A1 EP 91108505 A EP91108505 A EP 91108505A EP 91108505 A EP91108505 A EP 91108505A EP 0460475 A1 EP0460475 A1 EP 0460475A1
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EP
European Patent Office
Prior art keywords
boom
coupling device
coupling
coupled
webs
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.)
Withdrawn
Application number
EP91108505A
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German (de)
French (fr)
Inventor
Peter Dipl.-Ing. Barsuhn
Ernst Kaspar
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.)
Krupp Industietechnik GmbH
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Krupp Industietechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krupp Industietechnik GmbH filed Critical Krupp Industietechnik GmbH
Publication of EP0460475A1 publication Critical patent/EP0460475A1/en
Withdrawn legal-status Critical Current

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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
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • 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

Definitions

  • the invention relates to a telescopic boom with the following features:
  • the boom consists of a base body and several telescopic boom parts as well as an extension arrangement.
  • the boom parts have a box-shaped cross-section with side webs.
  • the push-out arrangement can be coupled to a cantilever part by a coupling device at at least two axially different locations.
  • Such a boom is such. B. from DE-PS 12 17 041 known.
  • the push-out arrangement is designed as a hydraulic cylinder, the cylinder body of which is fastened to the base body or base boom.
  • a guide carriage is provided for guiding the piston rod, in which there is a coupling device with a lifting and lowering coupling bolt which can engage in corresponding recesses in the lower flange of the head piece of the boom.
  • a disadvantage of the known boom is that the guide carriage is a complex construction. Furthermore, the coupling point in the lower flange of the head part results in an eccentric load in relation to the neutral plane of the head part or the entire boom, which can lead to canting when pushing the head piece in and out.
  • a telescopic boom in which the push-out arrangement also consists of a hydraulic cylinder, but the piston rod has a symmetrically shaped head with two outwardly facing recesses.
  • the coupling of the head of the piston rod to the head part of the telescopic boom takes place when the head part is pushed out from the middle telescope part and the piston rod is retracted by two double locking devices which are arranged symmetrically opposite one another on the middle telescope part adjoining the head part.
  • the double locking devices do not allow the head of the push-out arrangement to be coupled to the head part of the telescopic boom independently of the central telescopic part.
  • the invention has for its object to design a telescopic boom of the type mentioned so that it turns out simpler and easier overall while avoiding the disadvantages mentioned.
  • the coupling device is attached directly to the push-out arrangement and is slidably guided in guide rails which are arranged on the inner surface of the webs of the boom part to be coupled with the push-out arrangement, that the coupling device has active coupling elements pointing symmetrically to the sides and that the boom part to be coupled has recesses in its webs for receiving or stops for engaging the active coupling elements.
  • the structurally and cost-intensive guide carriage can be dispensed with. It is sufficient to use small guide elements, e.g. B. plastic sliding plate to provide on the coupling device.
  • the guide rails do not represent any additional material expenditure and therefore do not cause a higher overall weight, since the cantilever part to be coupled is usually provided with buckling stiffeners anyway, which are essentially U-shaped and firmly attached to their legs, to improve the buckling stiffness of the webs are connected to the web and run parallel to the main boom axis. It is therefore only necessary to design the buckling stiffeners so that they have guide surfaces. Due to the symmetrical design of the coupling device, no eccentric forces occur, at least in the lateral direction, so that a safe, faultless extension and insertion of the boom part to be coupled is ensured.
  • the active coupling elements In order to safely guide or hold the active coupling elements in the position to be coupled even in the event of an unintentional failure of energy, they are preferably acted upon by an energy or spring accumulator.
  • the spring accumulator can be formed by a mechanical spring or a pressurized gaseous and / or liquid medium and the coupling elements can be moved from the stops or out of the recesses for decoupling by a gaseous and / or liquid pressure medium.
  • the coupling device is preferably releasably connected to the push-out arrangement in order to facilitate assembly, even in the event of repairs.
  • limiting pieces are also provided on the telescopic part, which also simultaneously transmit power between the push-out arrangement and the Telescope part can serve.
  • the boom 1 shown is part of a (not shown) mobile crane. He is one horizontal axis 2 can be raised and lowered and can be rotated or pivoted about a vertical axis, as disclosed, for example, in DE-OS 30 28 241 (FIG. 1).
  • the jib 1 has three box-shaped jib parts: the base body 3, which is articulated directly on the vehicle crane in the horizontal axis 2, the telescopic intermediate part 4 and the telescopic head part 5 with the head 6, in which one or more rollers 7 for guiding the cable 8 are arranged .
  • Each boom part 3 ... 5 can be locked to the boom part adjacent to it by a locking arrangement on the reinforced edge 3a, 4a of the respectively larger boom part 3 or 4.
  • Each locking arrangement consists of two laterally arranged locking devices 9 (9.3 on the base body 3 and 9.4 on the intermediate part 4), each with a locking bolt 10, which can engage in corresponding recesses 11 in the webs 12 of the intermediate part 4 or the head part 5.
  • an upper and a lower guide rail 15, 16 are arranged parallel to the main axis 13 of the boom 1.
  • recesses 17 are provided on both sides in the center between the guide rails 15, 16, specifically the recesses 17.1 in the area facing the base body 3 and 17.2 in the vicinity of the head 9 (unless a specific recess below what is meant is generally the reference number 17).
  • a coupling device 22 is arranged at the free end of the piston rod 21.
  • This coupling device has a housing 23, within which there are two cylinder spaces 24, in each of which a piston 26 is slidably guided. Securing or coupling bolts 27 pointing outward are connected to the piston 26 and are guided through corresponding passages 28 in the end wall 29 of the housing 23.
  • the pistons 26 - and with them the coupling bolts 27 - are each pressed outwards by a compression spring 30. In this position, the coupling bolts 27 engage in one of the recesses 17 in the webs 12 of the head part 5.
  • Reinforcing plates 31 can be arranged around the recesses 17.
  • the cylinder space 32 between the pistons 26 and the respective end wall 29 of the housing 23 has a connection 34 and can be acted upon from the outside by a gaseous or liquid pressure medium.
  • the pistons 26 are moved against the force of the compression spring 30 in the direction of the vertical longitudinal center plane 35 of the head part 5 or the entire arm 1 and the securing bolts 27 are withdrawn from the recesses 17 of the webs 12: the piston rod 21 is from the Head section 5 uncoupled.
  • the housing 23 of the coupling device 22 is provided with slide plates 36 at the top and bottom and is slidably guided over the latter between the guide rails 15, 16.
  • limit pieces or stops 39.1 and 39.2 are provided on the webs 12 between the guide rails 15, 16 in the direction pointing away from each other. These limit pieces are used for the exact positioning of the housing 23 of the coupling device 22 for coupling with the head part 5. If the housing 23 abuts against the limit piece 39.1 or 39.2 due to the force of the piston rod 21, the bolts 27 can be inserted correctly into the recesses 17.1 or 17.2 guaranteed. At the same time, the limit pieces 39.1, 39.2 can be used for the axial force transmission between the piston rod 21 and the head piece 5.
  • the head part 5 is pushed out on the intermediate part 4 when the locking device 9.4 is unlocked and the locking device 9.4 is then locked again.
  • the coupling bolts 27 of the coupling device 22 are withdrawn from the recesses 17.2 of the head part and the piston rod 21 is retracted in the idle stroke.
  • the coupling device 22 slides in the guide rails 15, 16 of the head part 5 to the recesses 17.1 until it abuts the limiting pieces 39.1.
  • the coupling bolts 27 are pressed by the springs 30 into the recesses 17.1 at the inner end of the head part 5 and the piston rod 21 is thus coupled again to the head part 5 at another point.
  • the head part 5 can of course have further recesses at predetermined intervals between the recesses 17.1 and 17.
  • the disclosed coupling device 22 is not limited to the coupling of the piston rod 21 to the head part 5. Rather, the push-out arrangement 20, 21 can also be designed with its other end to be coupled to the base body 3 with the aid of a coupling device 22.

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

Abstract

The coupling device (22) for coupling the extension mechanism (20, 21) to a jib part (5) is directly attached to the extension mechanism and is guided in a slidable manner in guide rails (15, 16) which are arranged on the inner surface of the webs (12) of the jib part (5). The coupling device (22) has active coupling elements (27) which point symmetrically to the sides and can engage between stops or in recesses (17.1, 17.2). The coupling elements (27) are preferably pressed into the locking position by a spring accumulator (30). The coupling device (22) can be detachably connected to the extension mechanism (20, 21). In addition to the stops or the recesses (17.1, 17.2), limit pieces (39.1, 39.2) can be provided for the accurate positioning of the coupling device (22). <IMAGE>

Description

Die Erfindung betrifft einen Teleskopausleger mit folgenden Merkmalen: Der Ausleger besteht aus einem Grundkörper und mehreren teleskopierbaren Auslegerteilen sowie einer Ausschiebeanordnung. Die Auslegerteile haben einen kastenförmigen Querschnitt mit seitlichen Stegen. Die Ausschiebeanordnung ist mit einem Auslegerteil durch eine Kupplungsvorrichtung an mindestens zwei axial verschiedenen Stellen kuppelbar.The invention relates to a telescopic boom with the following features: The boom consists of a base body and several telescopic boom parts as well as an extension arrangement. The boom parts have a box-shaped cross-section with side webs. The push-out arrangement can be coupled to a cantilever part by a coupling device at at least two axially different locations.

Ein solcher Ausleger ist z. B. aus der DE-PS 12 17 041 bekannt. Bei dem bekannten Ausleger ist die Ausschiebeanordnung als Hydraulikzylinder ausgebildet, dessen Zylinderkörper am Grundkörper oder Grundausleger befestigt ist. Zur Führung der Kolbenstange ist ein Führungsschlitten vorgesehen, in dem sich eine Kupplungsvorrichtung mit heb- und senkbarem Kupplungsbolzen befindet, der in entsprechende Ausnehmungen im Untergurt des Kopfstücks des Auslegers eingreifen kann.Such a boom is such. B. from DE-PS 12 17 041 known. In the known boom, the push-out arrangement is designed as a hydraulic cylinder, the cylinder body of which is fastened to the base body or base boom. A guide carriage is provided for guiding the piston rod, in which there is a coupling device with a lifting and lowering coupling bolt which can engage in corresponding recesses in the lower flange of the head piece of the boom.

Als nachteilig an dem bekannten Ausleger wird empfunden, daß der Führungsschlitten eine aufwendige Konstruktion darstellt. Weiterhin ergibt sich durch die Kupplungsstelle im Untergurt des Kopfteils eine gegenüber der neutralen Ebene des Kopfteils bzw. des ganzen Auslegers eine außermittige Belastung, die zu Verkantungen beim Aus- und Einschieben des Kopfstücks führen kann.A disadvantage of the known boom is that the guide carriage is a complex construction. Furthermore, the coupling point in the lower flange of the head part results in an eccentric load in relation to the neutral plane of the head part or the entire boom, which can lead to canting when pushing the head piece in and out.

Weiterhin ist aus der DE-PS 35 10 710 ein Teleskopausleger bekannt, bei dem die Ausschiebeanordnung ebenfalls aus einem Hydraulikzylinder besteht, wobei jedoch die Kolbenstange einen symmetrisch ausgebildeten Kopf mit zwei nach außen weisenden Ausnehmungen aufweist. Das Kuppeln des Kopfes der Kolbenstange mit dem Kopfteil des Teleskopauslegers erfolgt bei ausgeschobenem Kopfteil aus dem mittleren Teleskopteil und zurückgezogener Kolbenstange durch zwei Doppelverriegelungseinrichtungen, die an dem sich an das Kopfteil anschließenden mittleren Teleskopteil symmetrisch gegenüberliegend angeordnet sind. Die Doppelverriegelungseinrichtungen erlauben es jedoch nicht, den Kopf der Ausschiebeanordnung unabhängig vom mittleren Teleskopteil mit dem Kopfteil des Teleskopauslegers zu kuppeln.Furthermore, from DE-PS 35 10 710 a telescopic boom is known, in which the push-out arrangement also consists of a hydraulic cylinder, but the piston rod has a symmetrically shaped head with two outwardly facing recesses. The coupling of the head of the piston rod to the head part of the telescopic boom takes place when the head part is pushed out from the middle telescope part and the piston rod is retracted by two double locking devices which are arranged symmetrically opposite one another on the middle telescope part adjoining the head part. However, the double locking devices do not allow the head of the push-out arrangement to be coupled to the head part of the telescopic boom independently of the central telescopic part.

Der Erfindung liegt die Aufgabe zugrunde, einen Teleskopausleger der eingangs genannten Art so zu gestalten, daß er unter Vermeidung der genannten Nachteile insgesamt einfacher und leichter ausfällt.The invention has for its object to design a telescopic boom of the type mentioned so that it turns out simpler and easier overall while avoiding the disadvantages mentioned.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Kupplungsvorrichtung unmittelbar an der Ausschiebeanordnung angebracht und in Führungsschienen gleitbar geführt ist, die an der Innenfläche der Stege des mit der Ausschiebeanordnung zu kuppelnden Auslegerteils angeordnet sind, daß die Kupplungsvorrichtung symmetrisch zu den Seiten weisende aktive Kupplungselemente aufweist und daß das zu kuppelnde Auslegerteil in seinen Stegen Ausnehmungen zur Aufnahme bzw. Anschläge zur Anlage der aktiven Kupplungselemente aufweist.This object is achieved in that the coupling device is attached directly to the push-out arrangement and is slidably guided in guide rails which are arranged on the inner surface of the webs of the boom part to be coupled with the push-out arrangement, that the coupling device has active coupling elements pointing symmetrically to the sides and that the boom part to be coupled has recesses in its webs for receiving or stops for engaging the active coupling elements.

Durch das Führen der Kupplungsvorrichtung in seitlichen Führungsschienen des zu kuppelnden Teleskopteils kann der baulich und kostenmäßig aufwendige Führungsschlitten entfallen. Es genügt völlig, kleine Führungselemente, z. B. Kunststoff-Gleitplättchen, an der Kupplungsvorrichtung vorzusehen. Die Führungsschienen stellen keinen materiellen Mehraufwand dar und verursachen damit auch kein höheres Gesamtgewicht, da das zu kuppelnde Auslegerteil zur Verbesserung der Beulsteifigkeit der Stege in der Regel ohnehin mit sog. Beulsteifen versehen ist, die im wesentlichen U-förmig ausgebildet und mit ihren Schenkeln fest mit dem Steg verbunden sind und parallel zur Auslegerhauptachse verlaufen. Es ist somit lediglich notwendig, die Beulsteifen so auszubilden, daß sie Führungsflächen aufweisen. Durch die symmetrische Ausbildung der Kupplungseinrichtung treten - zumindest in seitlicher Richtung - keine außermittigen Krafteinwirkungen auf, so daß ein sicheres, einwandfreies Aus- und Einschieben des zu kuppelnden Auslegerteils gewährleistet ist.By guiding the coupling device in the lateral guide rails of the telescopic part to be coupled, the structurally and cost-intensive guide carriage can be dispensed with. It is sufficient to use small guide elements, e.g. B. plastic sliding plate to provide on the coupling device. The guide rails do not represent any additional material expenditure and therefore do not cause a higher overall weight, since the cantilever part to be coupled is usually provided with buckling stiffeners anyway, which are essentially U-shaped and firmly attached to their legs, to improve the buckling stiffness of the webs are connected to the web and run parallel to the main boom axis. It is therefore only necessary to design the buckling stiffeners so that they have guide surfaces. Due to the symmetrical design of the coupling device, no eccentric forces occur, at least in the lateral direction, so that a safe, faultless extension and insertion of the boom part to be coupled is ensured.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben. Damit sich auch im übrigen ein günstiger Kraftfluß ergibt, sind die durch die Führungsschienen gegebene Führungsebene und die Anschläge bzw. Ausnehmungen an den Stegen des kuppelnden Auslegerteils im wesentlichen in Höhe der neutralen Ebene des Auslegerteils angeordnet.Advantageous developments of the invention are described in the subclaims. So that there is also a more favorable flow of force, the guide plane given by the guide rails and the stops or recesses on the webs of the coupling boom part are arranged essentially at the level of the neutral plane of the boom part.

Um die aktiven Kupplungselemente auch bei einem unbeabsichtigten Ausfall von Energie sicher in die zu kuppelnde Stellung zu führen bzw. in ihr zu halten, werden diese vorzugsweise durch einen Energie- oder Federspeicher beaufschlagt. Dabei kann der Federspeicher durch eine mechanische Feder oder ein unter Druck stehendes gasförmiges und/oder flüssiges Medium gebildet sein und das Bewegen der Kupplungselemente von den Anschlägen bzw. aus den Ausnehmungen zum Entkuppeln durch ein gasförmiges und/oder flüssiges Druckmedium erfolgen.In order to safely guide or hold the active coupling elements in the position to be coupled even in the event of an unintentional failure of energy, they are preferably acted upon by an energy or spring accumulator. Here the spring accumulator can be formed by a mechanical spring or a pressurized gaseous and / or liquid medium and the coupling elements can be moved from the stops or out of the recesses for decoupling by a gaseous and / or liquid pressure medium.

Die Kupplungsvorrichtung ist zur Erleichterung der Montage - auch bei etwaigen Reparaturen - vorzugsweise lösbar mit der Ausschiebeanordnung verbunden.The coupling device is preferably releasably connected to the push-out arrangement in order to facilitate assembly, even in the event of repairs.

Um das Gehäuse der Kupplungsvorrichtung beim Kuppelvorgang in genauer Lage zu haben und ein einwandfreies Einführen der aktiven Kupplungselemente (Kupplungsbolzen) zu erreichen, sind zusätzlich zu den Anschlägen bzw. Ausnehmungen noch am Teleskopteil befestigte Begrenzungsstücke vorgesehen, die auch gleichzeitig zur Kraftübertragung zwischen der Ausschiebeanordnung und dem Teleskopteil dienen können.In order to have the housing of the coupling device in a precise position during the coupling process and to ensure that the active coupling elements (coupling bolts) are inserted correctly, in addition to the stops or recesses, limiting pieces are also provided on the telescopic part, which also simultaneously transmit power between the push-out arrangement and the Telescope part can serve.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher erläutert. Es zeigen

Fig. 1
einen erfindungsgemäßen Teleskopausleger in einem schematisierten Längsschnitt,
Fig. 2
den Ausleger in einem Querschnitt längs der Linie II-II in Fig. 1 und
Fig. 3
den Ausleger in einem waagerechten Längsschnitt längs der Linie III-III in Fig. 2.
An embodiment of the invention is shown in the drawings and is explained in more detail below. Show it
Fig. 1
a telescopic boom according to the invention in a schematic longitudinal section,
Fig. 2
the boom in a cross section along the line II-II in Fig. 1 and
Fig. 3
the boom in a horizontal longitudinal section along the line III-III in Fig. 2nd

Der dargestellte Ausleger 1 ist Teil eines (nicht dargestellten) Fahrzeugkrans. Er ist um eine waagerechte Achse 2 heb- und senkbar und um eine senkrechte Achse dreh- bzw. schwenkbar gelagert, wie dies beispielsweise in der DE-OS 30 28 241 (Fig. 1) offenbart ist.The boom 1 shown is part of a (not shown) mobile crane. He is one horizontal axis 2 can be raised and lowered and can be rotated or pivoted about a vertical axis, as disclosed, for example, in DE-OS 30 28 241 (FIG. 1).

Der Ausleger 1 weist drei kastenförmige Auslegerteile auf: Den unmittelbar am Fahrzeugkran in der waagerechten Achse 2 angelenkten Grundkörper 3, das teleskopierbare Zwischenteil 4 und das teleskopierbare Kopfteil 5 mit dem Kopf 6, in dem eine oder mehrere Rollen 7 zur Führung des Seils 8 angeordnet sind.The jib 1 has three box-shaped jib parts: the base body 3, which is articulated directly on the vehicle crane in the horizontal axis 2, the telescopic intermediate part 4 and the telescopic head part 5 with the head 6, in which one or more rollers 7 for guiding the cable 8 are arranged .

Jedes Auslegerteil 3...5 ist mit dem ihm benachbarten Auslegerteil durch eine Verriegelungsanordnung an dem verstärkten Rand 3a, 4a des jeweils größeren Auslegerteils 3 bzw. 4 verriegelbar. Dabei besteht jede Verriegelungsanordnung aus zwei seitlich angeordneten Verriegelungseinrichtungen 9 (9.3 am Grundkörper 3 und 9.4 am Zwischenteil 4) mit je einem Verriegelungsbolzen 10, der in entsprechende Ausnehmungen 11 in den Stegen 12 des Zwischenteils 4 bzw. des Kopfteils 5 eingreifen kann.Each boom part 3 ... 5 can be locked to the boom part adjacent to it by a locking arrangement on the reinforced edge 3a, 4a of the respectively larger boom part 3 or 4. Each locking arrangement consists of two laterally arranged locking devices 9 (9.3 on the base body 3 and 9.4 on the intermediate part 4), each with a locking bolt 10, which can engage in corresponding recesses 11 in the webs 12 of the intermediate part 4 or the head part 5.

An der Innenseite der Stege 12 des Kopfteils 5 sind parallel zur Hauptachse 13 des Auslegers 1 je eine obere und untere Führungsschiene 15, 16 angeordnet. In den Stegen 12 des Kopfteils 5 sind an beiden Seiten mittig zwischen den Führungsschienen 15, 16 Ausnehmungen 17 vorgesehen, und zwar die Ausnehmungen 17.1 in dem dem Grundkörper 3 zugewandten Bereich und 17.2 in der Nähe des Kopfes 9 (soweit im folgenden nicht eine bestimmte Ausnehmung gemeint ist, wird allgemein das Bezugszeichen 17 verwendet).On the inside of the webs 12 of the head part 5, an upper and a lower guide rail 15, 16 are arranged parallel to the main axis 13 of the boom 1. In the webs 12 of the head part 5, recesses 17 are provided on both sides in the center between the guide rails 15, 16, specifically the recesses 17.1 in the area facing the base body 3 and 17.2 in the vicinity of the head 9 (unless a specific recess below what is meant is generally the reference number 17).

Innerhalb der Auslegerteile 3...5 befindet sich ein Hydraulikzylinder 20 mit einer Kolbenstange 21, die bei 19 im Grundkörper 3 gelagert ist. An dem freien Ende der Kolbenstange 21 ist eine Kupplungsvorrichtung 22 angeordnet. Diese Kupplungseinrichtung weist ein Gehäuse 23 auf, innerhalb dessen sich zwei Zylinderräume 24 befinden, in denen jeweils ein Kolben 26 gleitbar geführt ist. Mit den Kolben 26 sind nach außen weisende Sicherungs- oder Kupplungsbolzen 27 verbunden, die durch entsprechende Durchlässe 28 in der Stirnwand 29 des Gehäuses 23 geführt sind. Die Kolben 26 - und mit ihnen die Kupplungsbolzen 27 - werden jeweils durch eine Druckfeder 30 nach außen gedrückt. Die Kupplungsbolzen 27 greifen in dieser Position in eine der Ausnehmungen 17 in den Stegen 12 des Kopfteils 5 ein. Um die Ausnehmungen 17 können Verstärkungsbleche 31 angeordnet sein.A hydraulic cylinder 20 with a piston rod 21, which is mounted at 19 in the base body 3, is located within the boom parts 3 ... 5. A coupling device 22 is arranged at the free end of the piston rod 21. This coupling device has a housing 23, within which there are two cylinder spaces 24, in each of which a piston 26 is slidably guided. Securing or coupling bolts 27 pointing outward are connected to the piston 26 and are guided through corresponding passages 28 in the end wall 29 of the housing 23. The pistons 26 - and with them the coupling bolts 27 - are each pressed outwards by a compression spring 30. In this position, the coupling bolts 27 engage in one of the recesses 17 in the webs 12 of the head part 5. Reinforcing plates 31 can be arranged around the recesses 17.

Der Zylinderraum 32 zwischen den Kolben 26 und der jeweiligen Stirnwand 29 des Gehäuses 23 weist einen Anschluß 34 auf und kann durch diesen von außen durch ein gasförmiges oder flüssiges Druckmedium beaufschlagt werden. Im Falle der Beaufschlagung werden die Kolben 26 entgegen der Kraft der Druckfeder 30 in Richtung auf die senkrechte Längsmittelebene 35 des Kopfteils 5 bzw. des ganzen Auslegers 1 bewegt und die Sicherungsbolzen 27 aus den Ausnehmungen 17 der Stege 12 zurückgezogen: Die Kolbenstange 21 ist von dem Kopfteil 5 entkuppelt.The cylinder space 32 between the pistons 26 and the respective end wall 29 of the housing 23 has a connection 34 and can be acted upon from the outside by a gaseous or liquid pressure medium. In the event of loading, the pistons 26 are moved against the force of the compression spring 30 in the direction of the vertical longitudinal center plane 35 of the head part 5 or the entire arm 1 and the securing bolts 27 are withdrawn from the recesses 17 of the webs 12: the piston rod 21 is from the Head section 5 uncoupled.

Das Gehäuse 23 der Kupplungsvorrichtung 22 ist oben und unten mit Gleitplättchen 36 versehen und über diese zwischen den Führungsschienen 15, 16 gleitbar geführt. An dem Gehäuse befinden sich Flansche 37, die mit einem an der Kolbenstange 21 befestigten Druckstück 38 lösbar verbunden sind.The housing 23 of the coupling device 22 is provided with slide plates 36 at the top and bottom and is slidably guided over the latter between the guide rails 15, 16. On the housing there are flanges 37 which are detachably connected to a pressure piece 38 fastened to the piston rod 21.

In unmittelbarer Nähe der Ausnehmungen 17.1 und 17.2 sind an den Stegen 12 zwischen den Führungsschienen 15, 16 in der jeweils voneinander wegweisenden Richtung Begrenzungsstücke oder -anschläge 39.1 bzw. 39.2 vorgesehen. Diese Begrenzungsstücke dienen der genauen Positionierung des Gehäuses 23 der Kupplungsvorrichtung 22 zum Kuppeln mit dem Kopfteil 5. Wenn das Gehäuse 23 durch die Kraft der Kolbenstange 21 an dem Begrenzungsstück 39.1 bzw. 39.2 anliegt, ist ein einwandfreies Einfahren der Bolzen 27 in die Ausnehmungen 17.1 bzw. 17.2 gewährleistet. Gleichzeitig können die Begrenzungsstücke 39.1, 39.2 zur axialen Kraftübertragung zwischen der Kolbenstange 21 und dem Kopfstück 5 herangezogen werden.In the immediate vicinity of the recesses 17.1 and 17.2, limit pieces or stops 39.1 and 39.2 are provided on the webs 12 between the guide rails 15, 16 in the direction pointing away from each other. These limit pieces are used for the exact positioning of the housing 23 of the coupling device 22 for coupling with the head part 5. If the housing 23 abuts against the limit piece 39.1 or 39.2 due to the force of the piston rod 21, the bolts 27 can be inserted correctly into the recesses 17.1 or 17.2 guaranteed. At the same time, the limit pieces 39.1, 39.2 can be used for the axial force transmission between the piston rod 21 and the head piece 5.

Zur Überwachung der Stellung der Kupplungsbolzen 27 sind, wie z. B. in der DE-PS 35 10 710 offenbart, mechanische Endschalter oder induktive Näherungsschalter vorgesehen. Sowohl die Betätigung als auch die Überwachung der Kupplungsvorrichtung 22 kann somit zentral von dem Bedienungsstand des Krans erfolgen.To monitor the position of the coupling pin 27 are such. B. disclosed in DE-PS 35 10 710, mechanical limit switches or inductive proximity switches are provided. Both the actuation and the monitoring of the coupling device 22 can thus be carried out centrally from the operating position of the crane.

In der zusammengeschobenen Transportstellung des Auslegers 1 greifen die Kupplungsbolzen 27 der Kupplungsvorrichtung 22 in die Ausnehmungen 17.2 am Ende des Kopfteils 5 ein.In the pushed-together transport position of the boom 1, the coupling bolts 27 of the coupling device 22 engage in the recesses 17.2 at the end of the head part 5.

Durch Ausfahren der Kolbenstange 21 wird das Kopfteil 5 bei entriegelter Verriegelungseinrichtung 9.4 am Zwischenteil 4 ausgeschoben und die Verriegelungseinrichtung 9.4 anschließend wieder verriegelt.By extending the piston rod 21, the head part 5 is pushed out on the intermediate part 4 when the locking device 9.4 is unlocked and the locking device 9.4 is then locked again.

Nach dem Verriegeln der Verriegelungseinrichtung 9.4 werden die Kupplungsbolzen 27 der Kupplungsvorrichtung 22 aus den Ausnehmungen 17.2 des Kopfteils zurückgezogen und die Kolbenstange 21 im Leerhub eingezogen. Dabei gleitet die Kupplungsvorrichtung 22 in den Führungsschienen 15, 16 des Kopfteils 5 zu den Ausnehmungen 17.1, bis sie an die Begrenzungsstücke 39.1 anstößt. Durch Sperrung bzw. Aufhebung der Druckbeaufschlagung der Kupplungsvorrichtung 22 durch den Anschluß 34 werden die Kupplungsbolzen 27 durch die Federn 30 in die Ausnehmungen 17.1 am inneren Ende des Kopfteils 5 gedrückt und die Kolbenstange 21 so mit dem Kopfteil 5 an anderer Stelle erneut gekuppelt.After the locking device 9.4 has been locked, the coupling bolts 27 of the coupling device 22 are withdrawn from the recesses 17.2 of the head part and the piston rod 21 is retracted in the idle stroke. The coupling device 22 slides in the guide rails 15, 16 of the head part 5 to the recesses 17.1 until it abuts the limiting pieces 39.1. By locking or releasing the pressurization of the coupling device 22 through the connection 34, the coupling bolts 27 are pressed by the springs 30 into the recesses 17.1 at the inner end of the head part 5 and the piston rod 21 is thus coupled again to the head part 5 at another point.

Bei einem erneuten Ausfahren der Kolbenstange 21 werden das Kopf- und das Mittelteil 4, 5 bei entriegelter Verriegelungseinrichtung 9.3 gemeinsam ausgefahren und der Ausleger in seine größte, in Fig. 1 dargestellte Erstreckung gebracht.When the piston rod 21 is extended again, the head part and the middle part 4, 5 are extended together when the locking device 9.3 is unlocked and the boom is brought into its largest extension, shown in FIG. 1.

Zur Erzielung einer besseren Unterteilung der Auslegerlänge kann das Kopfteil 5 zwischen den Ausnehmungen 17.1 und 17 natürlich weitere Ausnehmungen in vorgebbaren Abständen aufweisen.In order to achieve a better subdivision of the boom length, the head part 5 can of course have further recesses at predetermined intervals between the recesses 17.1 and 17.

Die offenbarte Kupplungsvorrichtung 22 ist nicht auf die Kupplung der Kolbenstange 21 mit dem Kopfteil 5 beschränkt. Die Ausschiebeanordnung 20, 21 kann vielmehr mit Hilfe einer Kupplungsvorrichtung 22 auch mit ihrem anderen Ende mit dem Grundkörper 3 kuppelbar ausgebildet sein.The disclosed coupling device 22 is not limited to the coupling of the piston rod 21 to the head part 5. Rather, the push-out arrangement 20, 21 can also be designed with its other end to be coupled to the base body 3 with the aid of a coupling device 22.

Claims (5)

Teleskopausleger mit folgenden Merkmalen: - der Ausleger besteht aus einem Grundkörper und mehreren teleskopierbaren Auslegerteilen sowie einer Ausschiebeanordnung, - die Auslegerteile haben einen kastenförmigen Querschnitt mit seitlichen Stegen, - die Ausschiebeanordnung ist mit einem Auslegerteil durch eine Kupplungsvorrichtung an mindestens zwei axial verschiedenen Stellen kuppelbar, gekennzeichnet durch folgende Merkmale: - die Kupplungsvorrichtung (22) ist - unmittelbar an der Ausschiebeanordnung (20, 21) angebracht - und in an der Innenfläche der Stege (12) des mit der Ausschiebeanordnung (20, 21) zu kuppelnden Auslegerteils (5) angeordneten Führungsschienen (15, 16) gleitbar geführt, - die Kupplungsvorrichtung (22) weist symmetrisch zu den Seiten weisende aktive Kupplungselemente (27) auf, - das zu kuppelnde Auslegerteil (5) weist am Steg Anschläge (17.1, 17.2) zur Anlage bzw. Aufnahme der aktiven Kupplungselemente (27) auf. Telescopic boom with the following features: - the boom consists of a base body and several telescopic boom parts as well as an extension arrangement, - the boom parts have a box-shaped cross-section with lateral webs, the push-out arrangement can be coupled to a boom part by a coupling device at at least two axially different locations, characterized by the following features: - The coupling device (22) - Attached directly to the extension arrangement (20, 21) and slidably guided in the guide rails (15, 16) arranged on the inner surface of the webs (12) of the extension part (5) to be coupled with the push-out arrangement (20, 21), the coupling device (22) has active coupling elements (27) pointing symmetrically to the sides, - The boom part to be coupled (5) has stops (17.1, 17.2) on the web for contacting or receiving the active coupling elements (27). Teleskopausleger nach Anspruch 1, dadurch gekennzeichnet, daß die durch die Führungsschienen (15, 16) gegebene Führungsebene und die Anschläge (17.1, 17.2) an den Stegen (12) des zu kuppelnden Auslegerteils (5) im wesentlichen in Höhe der neutralen Ebene des Auslegerteils liegen.Telescopic boom according to claim 1, characterized in that the guide plane given by the guide rails (15, 16) and the stops (17.1, 17.2) on the webs (12) of the boom part (5) to be coupled essentially at the level of the neutral plane of the boom part lie. Teleskopausleger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die aktiven Kupplungselemente (27) durch einen Federspeicher (30) in die verriegelnde Stellung gedrückt werden.Telescopic boom according to claim 1 or 2, characterized in that the active coupling elements (27) are pressed into the locking position by a spring accumulator (30). Teleskopausleger nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Kupplungsvorrichtung (22) lösbar mit der Ausschiebeanordnung (20, 21) verbunden ist.Telescopic boom according to one of claims 1 to 3, characterized in that the coupling device (22) is detachably connected to the push-out arrangement (20, 21). Teleskopausleger nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß den Anschlägen (17.1, 17.2) an dem Auslegerteil (5) befestigte Begrenzungsstücke (39.1, 39.2) zur Anlage des Gehäuses (23) der Kupplungsvorrichtung (22) zugeordnet sind.Telescopic boom according to one of the preceding claims, characterized in that the stops (17.1, 17.2) attached to the boom part (5) are assigned limiting pieces (39.1, 39.2) for abutment of the housing (23) of the coupling device (22).
EP91108505A 1990-06-07 1991-05-25 Telescopic jib with coupling device for extension mechanism Withdrawn EP0460475A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4018222 1990-06-07
DE19904018222 DE4018222A1 (en) 1990-06-07 1990-06-07 TELESCOPIC BOOM WITH CLUTCH DEVICE FOR EXTENSION ARRANGEMENT

Publications (1)

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EP0460475A1 true EP0460475A1 (en) 1991-12-11

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EP91108505A Withdrawn EP0460475A1 (en) 1990-06-07 1991-05-25 Telescopic jib with coupling device for extension mechanism

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EP (1) EP0460475A1 (en)
DE (1) DE4018222A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583552A1 (en) * 1992-08-14 1994-02-23 LIEBHERR-WERK EHINGEN GmbH Telescopic jib for mobile cranes or the like
DE202006019308U1 (en) * 2006-12-21 2008-04-30 Liebherr-Werk Ehingen Gmbh telescopic section
DE202007002203U1 (en) * 2007-02-14 2008-06-26 Liebherr-Werk Ehingen Gmbh telescopic section
CN112173994A (en) * 2020-09-18 2021-01-05 中联重科股份有限公司 Control valve unit, hydraulic control loop and engineering equipment with telescopic crane boom

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DE29613131U1 (en) * 1996-08-01 1997-09-04 Heinrich Oelschläger Metallwarenfabrik GmbH & Co, 27318 Hoya Locking fitting, especially for height-adjustable tables
DE19811813B4 (en) 1998-03-18 2005-11-24 Grove U.S. LLC (n.d.Ges.d.Staates Delaware) Lateral boom interlock
DE10004838B4 (en) * 1999-02-10 2006-05-04 Terex-Demag Gmbh & Co. Kg Crane with a telescopic boom
DE102009009944B4 (en) * 2009-02-20 2011-02-24 Terex-Demag Gmbh Securing and bolting unit

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DE1217041B (en) * 1964-10-01 1966-05-18 Demag Zug Gmbh Telescopic boom with a power device arranged within the boom
GB1152143A (en) * 1966-10-17 1969-05-14 Sargent Engineering Corp Telescopic Boom for a Crane or the like
DE1276305B (en) * 1967-05-03 1968-08-29 Orenstein & Koppel Ag Telescopic boom for crane operation, especially for excavators
DE2029612A1 (en) * 1969-06-18 1971-03-04 Podpolianske Strojarne Narodny Telescopic boom for an excavator, crane or similar device
DE3146311A1 (en) * 1980-11-24 1982-06-16 Harnischfeger Corp., 53246 West Milwaukee, Wis. TELESCOPIC BOOM FOR A CRANE AND METHOD FOR TELESCOPING THE BOOM
FR2523565A1 (en) * 1982-03-19 1983-09-23 Ppm Sa Telescopic jib with extension - has one sliding part in which is extension controlled by stops
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US4688690A (en) * 1986-03-07 1987-08-25 Harnischfeger Corporation Method and apparatus for extending fly section of crane boom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583552A1 (en) * 1992-08-14 1994-02-23 LIEBHERR-WERK EHINGEN GmbH Telescopic jib for mobile cranes or the like
DE202006019308U1 (en) * 2006-12-21 2008-04-30 Liebherr-Werk Ehingen Gmbh telescopic section
DE202007002203U1 (en) * 2007-02-14 2008-06-26 Liebherr-Werk Ehingen Gmbh telescopic section
CN112173994A (en) * 2020-09-18 2021-01-05 中联重科股份有限公司 Control valve unit, hydraulic control loop and engineering equipment with telescopic crane boom
CN112173994B (en) * 2020-09-18 2021-11-05 中联重科股份有限公司 Control valve unit, hydraulic control loop and engineering equipment with telescopic crane boom

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