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EP1741663B1 - Upper boom cross section for telescopic cranes - Google Patents

Upper boom cross section for telescopic cranes Download PDF

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Publication number
EP1741663B1
EP1741663B1 EP05014792A EP05014792A EP1741663B1 EP 1741663 B1 EP1741663 B1 EP 1741663B1 EP 05014792 A EP05014792 A EP 05014792A EP 05014792 A EP05014792 A EP 05014792A EP 1741663 B1 EP1741663 B1 EP 1741663B1
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EP
European Patent Office
Prior art keywords
cross
sectional
sectional element
flat
elements
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.)
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Application number
EP05014792A
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German (de)
French (fr)
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EP1741663A1 (en
Inventor
Frank Dipl.-Ing. Richter
Enno Dipl.-Ing. Siebels
Rocco Dipl.-Ing. Tepper
Franz Dipl.-Ing. Paschke
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Grove US LLC
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Grove US LLC
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Filing date
Publication date
Application filed by Grove US LLC filed Critical Grove US LLC
Priority to DE502005010620T priority Critical patent/DE502005010620D1/en
Priority to ES05014792T priority patent/ES2357214T3/en
Priority to EP05014792A priority patent/EP1741663B1/en
Priority to CA2549448A priority patent/CA2549448C/en
Priority to CNA2006100904707A priority patent/CN1891612A/en
Priority to JP2006184355A priority patent/JP2007015860A/en
Priority to US11/481,052 priority patent/US7413093B2/en
Priority to KR1020060063951A priority patent/KR20070006613A/en
Publication of EP1741663A1 publication Critical patent/EP1741663A1/en
Application granted granted Critical
Publication of EP1741663B1 publication Critical patent/EP1741663B1/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
    • 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
    • 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

Definitions

  • the invention relates to a Obergurtquerexcellent for Kranteleskopteil.
  • it relates to a Obergurtquerexcellent for telescopic parts of a vehicle crane.
  • Telescopic crane jibs are exposed during operation to a load which results in a tension in the upper belt, that is to say in the upper half of the telescopic part cross-section.
  • horizontal bending and torsion can occur due to lateral forces (wind) and off-center loads.
  • the cross-section should be able to absorb the resulting stresses as well as possible due to its shape, and both are the case with the embodiment according to the invention.
  • a number of bends are created on the one hand, which act as idealized Beulsteifen. This is of great advantage for rocker tip operation but also in prestressed and / or guyed boom systems, and the need to provide separate buckling stiffeners is minimized or eliminated altogether.
  • the provision of the number and shape of cross-sectional elements according to the invention has the effect that bends are present in the lateral cross-sectional parts, so that the lateral single tuberosities are more limited and the total field of heel stiffened, unlike, for example, the relatively large or long single tuber surfaces that z. B. according to the DE 200 04 016 U1 to be provided.
  • the lateral Beulschreib is thus increased.
  • the outwardly curved cross-sectional elements can be designed so that they can be introduced with a single tool and in a crosstie, resulting in the entire upper flange (upper shell) a total of four bends or curves. This results in an easier manufacturability than in the provision of extensive and adjoining curved elements, as for example from the EP 1 321 425 A1 is known.
  • the flat (or straight-sided or rectilinear) cross-section elements offer the possibility of positioning the edging tool very precisely, thus ensuring high process reliability.
  • the present invention provides an optimal synthesis between manufacturing and strength optimization.
  • the third flat cross-sectional element extends parallel to the vertical longitudinal plane of the Kranteleskopteils and forms the lower end of the upper flange.
  • the cross section runs through this arrangement at its lower end straight back down and can thus well merge into a corresponding extending lower chord, which also creates an optimized introduction of force at this junction.
  • the upper belt cross-section forms substantially the entire upper half of the telescopic part cross-section, i. the lower end is located substantially at the height of the vertical cross-section center.
  • At least one, in particular all transitions between the flat cross-sectional elements and the outwardly curved cross-sectional elements extends tangentially. This avoids voltage spikes at the junctions.
  • the length ratios can also be reversed depending on the individual case or equal lengths can be provided for the elements.
  • the second flat cross-sectional element is not longer than the third flat cross-sectional element.
  • the cross-sectional elements can be arranged exactly in the above-mentioned order from the central upper element to the outside. Further, the cross-sectional elements are arranged so that flat and curved elements alternate.
  • “Curvature” or “bend” here mean gradual, curved or curved transitions in contrast to creases or angular transitions (with and without welds).
  • the figure shows a cross section of a Kranteleskopteils, especially for a vehicle crane.
  • a telescopic boom usually consists of a base part and a plurality of telescopic shots, and according to the invention the base part and / or the telescopic shots can have the cross-sectional shape according to the invention.
  • the telescopic part cross section is generally designated by the reference numeral 10 and it has a top flange 11 (upper shell) and a Lower chord 12 (lower shell), which are connected to one another at the point marked 13, in particular welded.
  • the upper flange 11 has according to the invention on five flat cross-sectional elements and four outwardly curved cross-sectional elements. Also according to the invention, the flat elements alternate with the outward elements.
  • the upper flange 11 has a flat element 1, which in the present case extends on both sides symmetrically to the vertical longitudinal plane 14 and overall forms the longest flat cross-sectional element.
  • the curved cross-sectional elements 2 and 4 are preferably designed so that they can be introduced with a tool and in each case a Kantgang.
  • the top flange 11 then receives a total of four edgings (bends or bends). An accurate positioning of the Kant tool is possible during manufacture by the straight or flat sections 1, 3 and 5, which increases the process reliability.
  • the radii of the curved cross-sectional elements 2 and 4 are preferably designed so that they can be introduced with a tool and each with a Kantgang. Thus, a tool change during the production of Obergurtschalen is unnecessary.
  • the radii are chosen so that the different material properties, sheet thickness and edge angle are taken into account.
  • the Transitions are made as far as possible tangential to avoid voltage spikes.
  • the curved sections or the bends in the overall cross-section act as Beulsteifen, the straight sections facilitate the production and overall, therefore, according to the invention an optimized between these parameters cross-sectional shape is provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Body Structure For Vehicles (AREA)

Description

Die Erfindung betrifft einen Obergurtquerschnitt für ein Kranteleskopteil. Insbesondere betrifft sie einen Obergurtquerschnitt für Teleskopteile eines Fahrzeugkrans.The invention relates to a Obergurtquerschnitt for Kranteleskopteil. In particular, it relates to a Obergurtquerschnitt for telescopic parts of a vehicle crane.

Teleskopierbare Kranausleger werden im Betrieb einer Belastung ausgesetzt, welche im Obergurt, das heißt etwa in der oberen Hälfte des Teleskopteilquerschnittes, in einer Zugspannung resultieren. Ferner können durch Seitenkräfte (Wind) und außermittige Belastungen auch horizontale Biegungen und Torsionen auftreten.Telescopic crane jibs are exposed during operation to a load which results in a tension in the upper belt, that is to say in the upper half of the telescopic part cross-section. In addition, horizontal bending and torsion can occur due to lateral forces (wind) and off-center loads.

Bevor man damit begann, der Querschnittsform des Obergurtes größere Bedeutung beizumessen, wurden meist halbkastenförmige Obergurtprofile bzw. Obergurtquerschnitte verwendet, wie einer beispielsweise in der DE 196 24 312 A1 beschrieben ist. Formangepasste Obergurtquerschnitte sind dann später beschrieben worden, beispielsweise in der DE 200 04 016 U1 und in der EP 1 321 425 A1 . Letztere Obergurtquerschnitte wiesen ein zentrales, flaches Querschnittselement und weitere nach außen gekrümmte und flache Querschnittselemente auf.Before one began to attach greater importance to the cross-sectional shape of the upper chord, semi-hull-shaped upper chord profiles and upper chord cross sections were used, as one example in the DE 196 24 312 A1 is described. Shaped upper flange cross sections have then been described later, for example in US Pat DE 200 04 016 U1 and in the EP 1 321 425 A1 , The latter Obergurtquerschnitte showed a central, flat cross-sectional element and further outwardly curved and flat cross-sectional elements.

Aus der JP 2005/112514 ist ein Obergurtquerschnitt für ein Kranteleskopteil mit einem zentralen, flachen Querschnittselement und mit weiteren nach außen gekrümmten und flachen Querschnittselementen bekannt, wobei auf jeder Querschnittsseite an das zentrale, flache Querschnittselement ein erstes nach außen gekrümmtes Querschnittselement, ein zweites flaches Querschnittselement, ein zweites nach außen gekrümmtes Querschnittselement und ein drittes flaches Querschnittselement anschließen, wobei das zweite nach außen gekrümmte Querschnittselement stärker nach außen gekrümmt ist, als das erste nach außen gekrümmte Querschnittselement.From the JP 2005/112514 is a Obergurtquerschnitt for Kranteleskopteil with a central, flat cross-sectional element and with other outwardly curved and flat cross-sectional elements known, wherein on each cross-sectional side of the central, flat cross-sectional element a first outwardly curved cross-sectional element, a second flat cross-sectional element, a second outwardly curved Connecting a cross-sectional element and a third flat cross-sectional element, wherein the second outwardly curved cross-sectional element is curved more outwardly than the first outwardly curved cross-sectional element.

Es ist die Aufgabe der vorliegenden Erfindung, einen Obergurtquerschnitt für ein Kranteleskopteil bereitzustellen, welcher ein optimiertes Verhältnis von Tragfähigkeit und Einfachheit in der Herstellung bietet.It is the object of the present invention to provide a top flange cross section for a Kranteleskopteil, which offers an optimized ratio of carrying capacity and ease of manufacture.

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

Erfindungsgemäß wird ein Obergurtquerschnitt für ein Kranteleskopteil zur Verfügung gestellt, bei dem auf jeder Querschnittsseite an das zentrale, flache Querschnittselement die folgenden Elemente anschließen:

  • ein erstes nach außen gekrümmtes Querschnittselement;
  • ein zweites flaches Querschnittselement;
  • ein zweites nach außen gekrümmtes Querschnittselement; und
  • ein drittes flaches Querschnittselement, wobei das erste nach außen gekrümmte Querschnittselement stärker nach außen gekrümmt ist als das zweite nach außen gekrümmte Querschnittselement.
According to the invention, a top flange cross-section is provided for a crantel telescope part, in which the following elements adjoin the central, flat cross-sectional element on each cross-sectional side:
  • a first outwardly curved cross-sectional element;
  • a second flat cross-sectional element;
  • a second outwardly curved cross-sectional element; and
  • a third flat cross-sectional element, wherein the first outwardly curved cross-sectional element is curved more outwardly than the second outwardly curved cross-sectional element.

Während das zentrale, flache Querschnittselement sich zu beiden Seiten der Vertikallängsebene des Kranteleskopteils erstreckt, sind die oben genannten anderen Querschnittselemente jeweils beidseitig von dieser Ebene vorhanden. Die Verwendung eines solchen Querschnittsaufbaus stellt nun eine Optimierung dar, und zwar einerseits hinsichtlich der Festigkeit, die eine solche Querschnittsform zur Verfügung stellt und andererseits hinsichtlich des Herstellungsverfahrens. Die Kosten für die Formgebung eines Teleskopteils, welches natürlich mit dem erfindungsgemäßen Obergurtquerschnitt ebenfalls ein Teil der vorliegenden Erfindung ist, bilden einen wesentlichen Anteil der Gesamtherstellungskosten und sind schon deshalb möglichst gering zu halten. Mit anderen Worten sollte eine weitgehend einfache Herstellung ermöglicht werden. Andererseits sollte der Querschnitt aufgrund seiner Form möglichst gut die entstehenden Belastungen aufnehmen können, und beides ist bei der erfindungsgemäßen Ausgestaltung der Fall. Durch die Verwendung der nach außen gekrümmten und flachen Querschnittselemente in der erfindungsgemäßen Anzahl werden einerseits eine Anzahl von Abbiegungen geschaffen, welche wie idealisierte Beulsteifen wirken. Dies ist für den Wippenspitzenbetrieb aber auch bei vorgespannten und/oder abgespannten Auslegersystemen von großem Vorteil, und die Notwendigkeit, separate Beulsteifen vorzusehen wird minimiert bzw. gänzlich eliminiert.While the central, flat cross-sectional element extends on both sides of the vertical longitudinal plane of the Kranteleskopteils, the above-mentioned other cross-sectional elements are respectively present on both sides of this plane. The use of such a cross-sectional structure is now an optimization, on the one hand in terms of the strength that provides such a cross-sectional shape and on the other hand with regard to the manufacturing process. The cost of shaping a telescopic part, which of course with the Obergurtquerschnitt invention is also part of the present invention, form a substantial proportion of the total manufacturing costs and are therefore already as low as possible. In other words, a largely simple production should be made possible. On the other hand, the cross-section should be able to absorb the resulting stresses as well as possible due to its shape, and both are the case with the embodiment according to the invention. By using the outwardly curved and flat cross-sectional elements in the number according to the invention a number of bends are created on the one hand, which act as idealized Beulsteifen. This is of great advantage for rocker tip operation but also in prestressed and / or guyed boom systems, and the need to provide separate buckling stiffeners is minimized or eliminated altogether.

Insbesondere wirkt sich die Bereitstellung der erfindungsgemäßen Anzahl und Form von Querschnittselementen dahingehend aus, dass in den seitlichen Querschnittsteilen Abbiegungen vorhanden sind, so dass die seitlichen Einzelbeulflächen stärker begrenzt und das Gesamtbeulfeld ausgesteift wird, und zwar anders als beispielsweise bei den relativ großen bzw. langen Einzelbeulflächen, die z. B. gemäß der DE 200 04 016 U1 bereit gestellt werden sollen. Insbesondere die seitliche Beulsicherheit wird damit erhöht.In particular, the provision of the number and shape of cross-sectional elements according to the invention has the effect that bends are present in the lateral cross-sectional parts, so that the lateral single tuberosities are more limited and the total field of heel stiffened, unlike, for example, the relatively large or long single tuber surfaces that z. B. according to the DE 200 04 016 U1 to be provided. In particular, the lateral Beulsicherheit is thus increased.

Andererseits ergibt sich eine deutlich preiswertere Fertigungsmöglichkeit. Die nach außen gekrümmten Querschnittselemente lassen sich so gestalten, dass sie mit einem einzigen Werkzeug und in einem Kantgang eingebracht werden können, wodurch sich im gesamten Obergurt (Oberschale) insgesamt vier Abbiegungen bzw. Krümmungen ergeben. Hieraus folgt eine leichtere Herstellbarkeit als bei der Bereitstellung ausgedehnter und aneinander anschließender gekrümmter Elemente, wie sie beispielsweise aus der EP 1 321 425 A1 bekannt ist. Die flachen (oder geradflächig bzw. geradlinig verlaufenden) Querschnittselemente bieten die Möglichkeit, das Kantwerkzeug sehr genau zu positionieren und gewährleisten somit eine hohe Prozesssicherheit.On the other hand, there is a significantly cheaper production possibility. The outwardly curved cross-sectional elements can be designed so that they can be introduced with a single tool and in a crosstie, resulting in the entire upper flange (upper shell) a total of four bends or curves. This results in an easier manufacturability than in the provision of extensive and adjoining curved elements, as for example from the EP 1 321 425 A1 is known. The flat (or straight-sided or rectilinear) cross-section elements offer the possibility of positioning the edging tool very precisely, thus ensuring high process reliability.

Damit schafft die vorliegende Erfindung eine optimale Synthese zwischen Fertigungs- und Festigkeitsoptimierung.Thus, the present invention provides an optimal synthesis between manufacturing and strength optimization.

Gemäß einer Ausführungsform der Erfindung verläuft das dritte flache Querschnittselement parallel zur Vertikallängsebene des Kranteleskopteils und bildet den unteren Abschluss des Obergurtes. Mit anderen Worten verläuft der Querschnitt durch diese Anordnung an seinem unteren Ende wieder gerade nach unten und kann damit gut in einen entsprechend verlaufenden Untergurtanschluss übergehen, was auch eine optimierte Krafteinleitung an dieser Verbindungsstelle schafft. Vorzugsweise bildet der Obergurtquerschnitt im wesentlichen die gesamte obere Hälfte des Teleskopteilquerschnittes, d.h. der untere Abschluss befindet sich im wesentlichen auf Höhe der vertilalen Querschnittsmitte. Dadurch wird die Verbindungsstelle (Schweißlinie) in die bei angehängter Last spannungsneutrale Zone zwischen Zug- und Druckspannungszone (oben/unten) gebracht.According to one embodiment of the invention, the third flat cross-sectional element extends parallel to the vertical longitudinal plane of the Kranteleskopteils and forms the lower end of the upper flange. In other words, the cross section runs through this arrangement at its lower end straight back down and can thus well merge into a corresponding extending lower chord, which also creates an optimized introduction of force at this junction. Preferably, the upper belt cross-section forms substantially the entire upper half of the telescopic part cross-section, i. the lower end is located substantially at the height of the vertical cross-section center. As a result, the connection point (welding line) is brought into the voltage-neutral zone between the tensile and compressive stress zones (top / bottom) when the load is attached.

Vorteilhafterweise verläuft mindestens einer, insbesondere alle Übergänge zwischen den flachen Querschnittselementen und den nach außen gekrümmten Querschnittselementen tangential. Hierdurch werden Spannungsspitzen an den Übergängen vermieden.Advantageously, at least one, in particular all transitions between the flat cross-sectional elements and the outwardly curved cross-sectional elements extends tangentially. This avoids voltage spikes at the junctions.

Bezüglich ihrer Länge können die Querschnittselemente mindestens einer, aber auch mehreren der folgenden Bedingungen genügen:

  • das erste nach außen gekrümmte Querschnittselement ist länger als das zweite nach außen gekrümmte Querschnittselement.
  • das zentrale, flache Querschnittselement ist länger als das zweite flache Querschnittselement (das zentrale, flache Querschnittselement kann im Rahmen der vorliegenden Nomenklatur auch als das "erste flache Querschnittselement" angesehen werden).
  • das zweite flache Querschnittselement ist länger als das dritte flache Querschnittselement.
With regard to their length, the cross-sectional elements can satisfy at least one, but also several of the following conditions:
  • the first outwardly-curved cross-sectional element is longer than the second outwardly-curved cross-sectional element.
  • the central, flat cross-sectional element is longer than the second flat cross-sectional element (the central, flat cross-sectional element may also be considered as the "first flat cross-sectional element" in the present nomenclature).
  • the second flat cross-sectional element is longer than the third flat cross-sectional element.

Die Längenverhältnisse können je nach Einzelfall auch umgekehrt sein oder gleiche Längen können für die Elemente vorgesehen werden. Bei kleineren Auslegerteilen ist beispielsweise das zweite flache Querschnittselement nicht länger als das dritte flache Querschnittselement. Die Querschnittselemente können genau in der oben eingangs angegebenen Reihenfolge vom zentralen oberen Element weg nach außen hin angeordnet sein. Ferner sind die Querschnittselemente so angeordnet dass flache und gekrümmte Elemente sich abwechseln.The length ratios can also be reversed depending on the individual case or equal lengths can be provided for the elements. For smaller boom parts, for example, the second flat cross-sectional element is not longer than the third flat cross-sectional element. The cross-sectional elements can be arranged exactly in the above-mentioned order from the central upper element to the outside. Further, the cross-sectional elements are arranged so that flat and curved elements alternate.

"Krümmung" oder "Biegung" bedeuten hier allmähliche, kurven- oder bogenförmige Übergänge im Gegensatz zu Knickkanten oder winkeligen Übergängen (mit und ohne Schweißnähte)."Curvature" or "bend" here mean gradual, curved or curved transitions in contrast to creases or angular transitions (with and without welds).

Die Erfindung wird im Weiteren anhand einer Ausführungsform näher erläutert. Sie kann alle hierin aufgeführten Merkmale einzeln oder in jedweder Kombination aufweisen. Die Figur zeigt einen Querschnitt eines Kranteleskopteils, insbesondere für einen Fahrzeugkran. Solch ein Teleskopausleger besteht meist aus einem Basisteil und mehreren Teleskopschüssen, und gemäß der Erfindung können das Basisteil und/oder die Teleskopschüsse die erfindungsgemäße Querschnittsform aufweisen. In der Figur ist der Teleskopteilquerschnitt insgesamt mit dem Bezugszeichen 10 versehen und er weist einen Obergurt 11 (Oberschale) und einen Untergurt 12 (Unterschale) auf, die an der mit 13 gekennzeichneten Stelle miteinander verbunden, insbesondere verschweißt sind.The invention will be explained in more detail below with reference to an embodiment. It may have all the features listed herein individually or in any combination. The figure shows a cross section of a Kranteleskopteils, especially for a vehicle crane. Such a telescopic boom usually consists of a base part and a plurality of telescopic shots, and according to the invention the base part and / or the telescopic shots can have the cross-sectional shape according to the invention. In the figure, the telescopic part cross section is generally designated by the reference numeral 10 and it has a top flange 11 (upper shell) and a Lower chord 12 (lower shell), which are connected to one another at the point marked 13, in particular welded.

Der Obergurt 11 weist gemäß der Erfindung fünf flache Querschnittselemente und vier nach außen gekrümmte Querschnittselemente auf. Ebenfalls erfindungsgemäß wechseln sich die flachen Elemente mit den nach außen Elementen ab.The upper flange 11 has according to the invention on five flat cross-sectional elements and four outwardly curved cross-sectional elements. Also according to the invention, the flat elements alternate with the outward elements.

Oben und zentral weist der Obergurt 11 ein flaches Element 1 auf, welches sich im vorliegenden Fall beidseitig symmetrisch zur Vertikallängsebene 14 erstreckt und insgesamt das längste flache Querschnittselement bildet.Above and centrally, the upper flange 11 has a flat element 1, which in the present case extends on both sides symmetrically to the vertical longitudinal plane 14 and overall forms the longest flat cross-sectional element.

Unmittelbar an das Querschnittselement 1 schließen sich beidseitig nach außen gekrümmte Querschnittselemente 2 an, auf welche wiederum die zweiten flachen Querschnittselemente 3 folgen. Auf die zweiten flachen Querschnittselemente 3 folgen zweite nach außen gekrümmte Querschnittselemente 4, die dann jeweils wieder in dritte flache Querschnittselemente 5 übergehen, wobei letztere dann auch den unteren und äußeren Abschluss des Obergurtes bilden. Am unteren Rand der flachen Querschnittselemente erfolgt die Verbindung 13 mit dem Untergurt 12.Immediately adjacent to the cross-sectional element 1 are curved on both sides outwardly curved cross-sectional elements 2, which in turn follow the second flat cross-sectional elements 3. The second flat cross-sectional elements 3 are followed by second, outwardly curved cross-sectional elements 4, which then in turn merge into third flat cross-sectional elements 5, the latter then also forming the lower and outer ends of the upper flange. At the bottom of the flat cross-sectional elements, the connection 13 with the lower flange 12th

Die gekrümmten Querschnittselemente 2 und 4 werden vorzugsweise so gestaltet, dass sie mit einem Werkzeug und in jeweils einem Kantgang eingebracht werden können. Der Obergurt 11 erhält dann insgesamt vier Kantungen (Krümmungen bzw. Biegungen). Eine genaue Positionierung des Kantwerkzeugs ist während der Herstellung durch die geraden bzw. flachen Abschnitte 1, 3 und 5 möglich, was die Prozesssicherheit erhöht.The curved cross-sectional elements 2 and 4 are preferably designed so that they can be introduced with a tool and in each case a Kantgang. The top flange 11 then receives a total of four edgings (bends or bends). An accurate positioning of the Kant tool is possible during manufacture by the straight or flat sections 1, 3 and 5, which increases the process reliability.

Bei der Fertigung der Auslegerschalen für das Basisteil und/oder die Teleskopschüsse eines Auslegers werden die Radien der gekrümmten Querschnittselemente 2 und 4 vorzugsweise so gestaltet, dass sie mit einem Werkzeug und mit jeweils einem Kantgang eingebracht werden können. Somit wird ein Werkzeugwechsel während der Fertigung der Obergurtschalen überflüssig. Die Radien werden so gewählt, dass die unterschiedlichen Materialeigenschaften, Blechdicken und Kantwinkel berücksichtigt werden . Die Übergänge erfolgen soweit als möglich tangential, um Spannungsspitzen zu vermeiden.In the manufacture of the boom shells for the base part and / or the telescopic shots of a boom, the radii of the curved cross-sectional elements 2 and 4 are preferably designed so that they can be introduced with a tool and each with a Kantgang. Thus, a tool change during the production of Obergurtschalen is unnecessary. The radii are chosen so that the different material properties, sheet thickness and edge angle are taken into account. The Transitions are made as far as possible tangential to avoid voltage spikes.

Die gekrümmten Abschnitte bzw. die Abbiegungen im Gesamtquerschnitt wirken als Beulsteifen, die geraden Abschnitte erleichtern die Fertigung und insgesamt wird damit erfindungsgemäß eine zwischen diesen Parametern optimierte Querschnittsform zur Verfügung gestellt.The curved sections or the bends in the overall cross-section act as Beulsteifen, the straight sections facilitate the production and overall, therefore, according to the invention an optimized between these parameters cross-sectional shape is provided.

Claims (10)

  1. An upper chord cross-section for a telescopic part of a crane, comprising a central flat cross-sectional element (1) and other outwardly curved and flat cross-sectional elements (2 to 5), wherein the following elements are connected to the central flat cross-sectional element on each cross-sectional side:
    - a first outwardly curved cross-sectional element (2);
    - a second flat cross-sectional element (3);
    - a second outwardly curved cross-sectional element (4); and
    - a third flat cross-sectional element (5),
    characterised in that the first outwardly curved cross-sectional element (2) is outwardly curved more sharply than the second outwardly curved cross-sectional element (4).
  2. The upper chord cross-section according to claim 1, characterised in that the third flat cross-sectional element (5) runs parallel to the vertical longitudinal plane of the telescopic part of the crane and forms the lower termination of the upper chord (11).
  3. The upper chord cross-section according to any one of claims 1 or 2, characterised in that it forms substantially the entire upper half of the cross-section of the telescopic part.
  4. The upper chord cross-section according to any one of claims 1 to 3, characterised in that at least one and in particular all of the transitions between the flat cross-sectional elements (1, 3, 5) and the outwardly curved cross-sectional elements (2, 4) run tangentially.
  5. The upper chord cross-section according to any one of claims 1 to 4, characterised in that the first outwardly curved cross-sectional element (2) is longer than the second outwardly curved cross-sectional element (4).
  6. The upper chord cross-section according to any one of claims 1 to 5, characterised in that the central flat cross-sectional element (1) is longer than the second flat cross-sectional element (3).
  7. The upper chord cross-section according to any one of claims 1 to 6, characterised in that the second flat cross-sectional element (3) is longer than the third flat cross-sectional element (5).
  8. The upper chord cross-section according to any one of claims 1 to 5, characterised in that the central flat cross-sectional element (1) is as long as or shorter than the second flat cross-sectional element (3).
  9. The upper chord cross-section according to any one of claims 1 to 6, characterised in that the second flat cross-sectional element (3) is as long as or shorter than the third flat cross-sectional element (5).
  10. The upper chord cross-section according to any one of claims 1 to 9, characterised in that the cross-sectional elements (2 to 5) are arranged such that flat and curved elements alternate.
EP05014792A 2005-07-07 2005-07-07 Upper boom cross section for telescopic cranes Active EP1741663B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE502005010620T DE502005010620D1 (en) 2005-07-07 2005-07-07 Upper belt cross-section for Kranteleskopteile
ES05014792T ES2357214T3 (en) 2005-07-07 2005-07-07 UPPER BAND SECTION FOR TELESCOPIC CRANES.
EP05014792A EP1741663B1 (en) 2005-07-07 2005-07-07 Upper boom cross section for telescopic cranes
CA2549448A CA2549448C (en) 2005-07-07 2006-06-05 Upper chord cross-section for telescopic parts of a crane
CNA2006100904707A CN1891612A (en) 2005-07-07 2006-06-27 Upper boom cross section for telescopic cranes
JP2006184355A JP2007015860A (en) 2005-07-07 2006-07-04 Top chord cross section of telescopic part of crane
US11/481,052 US7413093B2 (en) 2005-07-07 2006-07-06 Upper chord cross-section for telescopic parts of a crane
KR1020060063951A KR20070006613A (en) 2005-07-07 2006-07-07 Upper chord for telescopic parts of a crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05014792A EP1741663B1 (en) 2005-07-07 2005-07-07 Upper boom cross section for telescopic cranes

Publications (2)

Publication Number Publication Date
EP1741663A1 EP1741663A1 (en) 2007-01-10
EP1741663B1 true EP1741663B1 (en) 2010-12-01

Family

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Application Number Title Priority Date Filing Date
EP05014792A Active EP1741663B1 (en) 2005-07-07 2005-07-07 Upper boom cross section for telescopic cranes

Country Status (8)

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US (1) US7413093B2 (en)
EP (1) EP1741663B1 (en)
JP (1) JP2007015860A (en)
KR (1) KR20070006613A (en)
CN (1) CN1891612A (en)
CA (1) CA2549448C (en)
DE (1) DE502005010620D1 (en)
ES (1) ES2357214T3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0816460B1 (en) * 2007-09-05 2019-11-19 Palfinger Ag profile form for a crane boom, crane system for a crane, crane and utility vehicle
DE102008032976B4 (en) * 2007-09-12 2018-02-22 Manitowoc Crane Group France Sas A telescopic crane jib part
JP2010176277A (en) * 2009-01-28 2010-08-12 Sanyo Electric Co Ltd Data transfer system
US20120199543A1 (en) * 2011-02-09 2012-08-09 Oshkosh Corporation Boom for a crane assembly
RU175228U1 (en) * 2017-07-14 2017-11-28 Акционерное общество "Галичский автокрановый завод" Crane boom
WO2021105136A1 (en) * 2019-11-27 2021-06-03 Magni Telescopic Handlers S.R.L. Telescopic handler
CN111252678A (en) * 2020-03-05 2020-06-09 中国华冶科工集团有限公司 Tower crane luffing trolley motor replacing device and replacing method

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Publication number Priority date Publication date Assignee Title
DE19624312C2 (en) 1996-06-18 2000-05-31 Grove Us Llc Telescopic boom for mobile cranes
DE19711975B4 (en) * 1997-03-12 2006-09-07 Terex-Demag Gmbh & Co. Kg Telescopic boom for mobile cranes
FR2790538B1 (en) * 1999-03-02 2001-05-25 Ppm HOLLOW BOX BEAM STRUCTURE, BEAM APPLIED AND TELESCOPIC ARROW IMPLEMENTING IT
DE20004016U1 (en) 2000-03-03 2001-07-12 Liebherr-Werk Ehingen Gmbh, 89584 Ehingen Telescopic boom for cranes, preferably mobile cranes
EP1278695A1 (en) * 2000-03-28 2003-01-29 David J. Higgins Telescoping boom
DE10138443A1 (en) * 2001-08-03 2003-02-27 Mannesmann Roehren Werke Ag Use of an elongated, hot-worked hollow profile for a telescopic boom of a lifting device
DE20120121U1 (en) * 2001-12-12 2002-03-07 Grove U.S. LLC, Shady Grove, Pa. Telescopic boom for a mobile crane
US6726437B2 (en) * 2002-02-08 2004-04-27 Clark Equipment Company Telescoping loader lift arm
JP2005112514A (en) * 2003-10-06 2005-04-28 Tadano Ltd Expansion boom

Also Published As

Publication number Publication date
CN1891612A (en) 2007-01-10
US7413093B2 (en) 2008-08-19
CA2549448A1 (en) 2007-01-07
ES2357214T3 (en) 2011-04-20
DE502005010620D1 (en) 2011-01-13
KR20070006613A (en) 2007-01-11
CA2549448C (en) 2010-10-05
US20070034588A1 (en) 2007-02-15
JP2007015860A (en) 2007-01-25
EP1741663A1 (en) 2007-01-10

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