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EP1770050B1 - Foldable crane - Google Patents

Foldable crane Download PDF

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Publication number
EP1770050B1
EP1770050B1 EP05021285A EP05021285A EP1770050B1 EP 1770050 B1 EP1770050 B1 EP 1770050B1 EP 05021285 A EP05021285 A EP 05021285A EP 05021285 A EP05021285 A EP 05021285A EP 1770050 B1 EP1770050 B1 EP 1770050B1
Authority
EP
European Patent Office
Prior art keywords
arm
articulated
crane
articulated arm
cylinder
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.)
Active
Application number
EP05021285A
Other languages
German (de)
French (fr)
Other versions
EP1770050A1 (en
Inventor
Georg Steindl
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.)
Steindl Krantechnik GmbH
Original Assignee
Steindl Krantechnik Gesmbh
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 Steindl Krantechnik Gesmbh filed Critical Steindl Krantechnik Gesmbh
Priority to SI200530943T priority Critical patent/SI1770050T1/en
Priority to DE502005008754T priority patent/DE502005008754D1/en
Priority to EP05021285A priority patent/EP1770050B1/en
Priority to AT05021285T priority patent/ATE452853T1/en
Priority to ES05021285T priority patent/ES2337262T3/en
Priority to DK05021285.1T priority patent/DK1770050T3/en
Publication of EP1770050A1 publication Critical patent/EP1770050A1/en
Application granted granted Critical
Publication of EP1770050B1 publication Critical patent/EP1770050B1/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
    • B66C23/54—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 with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • 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
    • B66C23/54—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 with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • B66C23/545—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 with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors with arrangements for avoiding dead centre problems during cylinder motion
    • 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
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration

Definitions

  • the invention relates to a folding crane according to the preamble of claim 1.
  • Such cranes are known per se and are used for example in forestry or the Schrotiverêt used.
  • the three main parts of generic cranes, the crane column, the lift arm and the articulated arm can be arranged in the folded state of the crane Z-shaped, it was usual practice to perform the articulated arm in the region of its articulation with the lift arm open, so that the articulated arm and the Lift arm can interlock in the folded state.
  • a crane in which the lifting arm has a fork-shaped receiving portion for the articulated arm is in the US 3,032,206 shown.
  • the bending cylinder acting between the lifting arm and the articulated arm is arranged inside lying in the fork-shaped receiving portion, so that the connection between the articulated cylinder and the articulated arm must be solved for z-shaped folding of the crane.
  • the invention has therefore taken on the task of creating a generic crane, with a simple way to extend the reach of the crane is possible and the overall represents a simple constructive solution.
  • the articulated arm is designed as a forming tube in which a telescopic arm is movably mounted, wherein the receiving area of the Knickarmes for the telescopic arm substantially, preferably directly, extends to the hinge connection with the lift arm.
  • the articulated arm as a forming tube, for example, with a rectangular, polygonal or oval cross-section, in which a telescopic arm is movably mounted formed
  • the telescopic arm can be formed substantially the same length as the articulated arm, while in the prior art, the telescopic arm - due arranged in the end region of the articulated arm receiving opening for the lift arm - shorter than the articulated arm had to be formed.
  • the invention thus results in an extension of the range, which can be between 30 cm and 120 cm depending on the design characteristics of the crane.
  • Another advantage of the invention results from the arrangement of the articulated cylinder. If one considers the joint triangle formed between the two articulation points of the articulated cylinder and the axis of rotation between the lifting arm and the articulated arm, whose base is formed by the articulated cylinder, it has hitherto been assumed that the shorter of the two between the two articulation points of the articulated cylinder and the axis of rotation of the articulated connection formed leg is to be arranged on that arm of the Gelenkarmsystems on which the receiving opening for the second arm of the Gelenkarmsystems is formed. If one followed this principle, would result in the inventive arrangement of the receiving portion on the lift arm, a maximum angle of movement for the buckling cylinder of about 310 to 320 °.
  • the angle of movement which the articulated cylinder between its two end positions includes less than 80 °, preferably less than 60 °, a preferred embodiment of the invention provides that the movement angle of the articulated cylinder between 20 ° and 50 °, preferably at about 35 °, lies.
  • the distance between the axis of rotation of the articulated connection and the articulation point of the articulated cylinder on the lifting arm is greater than the distance between the axis of rotation of the articulated connection and the articulation point of the articulated cylinder on the articulated arm. It has proved to be advantageous if the ratio of the distance between the axis of rotation of the articulated connection and the articulation point of the articulated cylinder on the lifting arm to the distance between the axis of rotation of the articulated connection and the articulation point of the articulated cylinder at the articulated between 4: 1 and 1.5: 1, preferably between 3: 1 and 2: 1 is.
  • a further embodiment of the invention with which the collapse of the crane in its Z-shape can be realized in a simple manner, provides that the at least one articulated cylinder is hinged laterally outwardly on the lifting arm and the articulated arm, wherein it has proved to be favorable when the crane has two articulated cylinders articulated on opposite sides on the lift arm and the articulated arm.
  • the (the) articulation point (s) of the (the) articulated cylinder (s) is arranged on the lifting arm outside the receiving portion for the articulated arm (are), which results in a more robust overall construction, since the deflection of the forces no longer takes place, as in the prior art, into the open receiving section of one of the two arms of the articulated arm system.
  • the in Fig. 1 illustrated crane 1 is designed as a vehicle crane, which is mounted on a arranged or arranged on a vehicle base 14.
  • the crane 1 has a crane column 2, which is rotatably mounted on the base 14 about a vertical axis.
  • the articulated arm system 3 is pivotally connected to the crane column 2 via the articulated connection 15, namely about an axis of rotation 16 which is essentially normal to the main plane of the crane 1.
  • the Gelenkarmsystem 3 has in the illustrated embodiment, a lifting arm 4 and a pivotally connected to the lifting arm 4 articulated arm 5, wherein the arrangement of the axis of rotation 10 of the articulated connection 8 between the lifting arm 4 and the articulated arm 5 is such that - analogous to the articulation 15 between the Crane column 2 and the Gelenkarmsystem 3 - the two upper the articulated connection 8 and 15 connected arms 4, 5 come to rest in the folded state substantially in a plane, wherein - as from Fig. 1 seen - the crane column 2, the lifting arm 4 and the articulated arm 5 of the crane 1 are arranged in the folded state Z-shaped.
  • the articulated arm 5 is formed as a forming tube, in which a telescopic arm 13 is mounted movable or displaceable.
  • the Fig. 2a and 2b show the Gelenkarmsystem 3 in the extended state, ie the lift arm 4 and the articulated arm 5 are substantially on a straight line.
  • the articulated cylinder 7 which forms the base of the articulation triangle between the articulation points 11 and 12 and the axis of rotation 10 is arranged such that the distance a between the articulation point 11 of the articulated cylinder 7 on the lifting arm 4 and the axis of rotation 10 in about 2 1 ⁇ 2 to 3 times as large as the distance b between the articulation point 12 of the articulated cylinder 7 on the articulated arm 5 and the axis of rotation 10.
  • the long leg of the articulated triangle is on the lifting arm 4, while the short leg of the articulation triangle, which is also referred to as a moment lever, is formed on the articulated arm 5.
  • a receiving portion 9 is formed for the articulated arm 5, in the region of the articulated joint 8. Due to this arrangement is almost the entire length of the formed as a forming tube articulated arm 5 as a receiving area for the articulated arm 5 movable or displaceable mounted telescopic arm 13 available, which results in relation to the prior art, a range extension of the crane 1 of up to 1.20 m.
  • the articulated arm 5 engages in the fork-shaped receiving portion 9 of the lifting arm 4, wherein the side of the articulated arm 5 arranged articulation point 12 serves as a stop and thus limits the pivotal movement of the articulated arm 5.
  • Fig. 4 schematically the pivoting characteristic of the Gelenkarmsystems 3 is shown.
  • the lifting arm 4 and the articulated arm 5 are pivotally connected to each other via the axis of rotation 10, wherein the mutual pivoting movement takes place via the articulation cylinder 7, which is articulated on the lifting arm 4 in the articulation point 11 and the articulated arm 5 in the articulation point 12.
  • the articulation of the articulated cylinder on the lifting arm 4 and the articulated arm 5 is such that the distance a between the articulation point 11 and the axis of rotation 10 is greater, preferably about 21 ⁇ 2 times as large as the distance b between the articulation point 12 and the axis of rotation 10.
  • the maximum travel angle ⁇ of the articulated arm 5, which is defined by the two end positions of the articulated arm 5, is - as in the already known from the prior art solutions - at about 310 °.
  • This movement angle ⁇ is a prerequisite for allowing generic cranes to be arranged Z-shaped in the folded state.
  • the subject of the application is not limited to this embodiment. Rather, measures and modifications that serve to implement the inventive concept of a Z-shaped collapsible crane with extended range, quite conceivable and desirable.
  • the crane according to the invention is by no means limited to mobile cranes, i. the base for the crane column can also be stored stationary, as is often the case in scrap recycling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Tumbler Switches (AREA)

Abstract

The crane has a crane support, and a hinge arm system (3) having a hub arm (4) and a break arm (5) connected with the arm (4). A hub cylinder is operated between the support and the hub arm, and a break cylinder (7) is operated between the arms. The hub arm has an accommodation section for the break arm in an area of articulation of the hub arm with the break arm, where the distance between the rotary axis of the articulation and a guiding point (11) of the break cylinder at the hub arm is larger than the distance between the axis of the articulation and guiding point (12) at the break arm.

Description

Die Erfindung betrifft einen klappbaren Kran gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a folding crane according to the preamble of claim 1.

Derartige Kräne sind an sich bekannt und kommen beispielsweise in der Forstwirtschaft oder der Schrotiverwertung zum Einsatz. Damit die drei Hauptteile gattungsgemäßer Kräne, die Kransäule, der Hubarm und der Knickarm, im zusammengeklappten Zustand des Krans Z-förmig angeordnet werden können, war es bisher üblich, den Knickarm im Bereich seiner Gelenkverbindung mit dem Hubarm offen auszuführen, sodass der Knickarm und der Hubarm im zusammengeklappten Zustand ineinander greifen können.Such cranes are known per se and are used for example in forestry or the Schrotiverwertung used. Thus, the three main parts of generic cranes, the crane column, the lift arm and the articulated arm, can be arranged in the folded state of the crane Z-shaped, it was usual practice to perform the articulated arm in the region of its articulation with the lift arm open, so that the articulated arm and the Lift arm can interlock in the folded state.

Ein Kran, bei dem der Hubarm einen gabelförmigen Aufnahmeabschnitt für den Knickarm aufweist, ist in der US 3,032,206 gezeigt. Dabei ist der zwischen dem Hubarm und dem Knickarm wirkende Knickzylinder innen liegend im gabelförmigen Aufnahmeabschnitt angeordnet, sodass zum z-förmigen Zusammenklappen des Krans die Verbindung zwischen dem Knickzylinder und dem Knickarm gelöst werden muß.A crane in which the lifting arm has a fork-shaped receiving portion for the articulated arm, is in the US 3,032,206 shown. In this case, the bending cylinder acting between the lifting arm and the articulated arm is arranged inside lying in the fork-shaped receiving portion, so that the connection between the articulated cylinder and the articulated arm must be solved for z-shaped folding of the crane.

Diese durchaus praktikablen Lösungen weisen den Nachteil auf, dass durch die Ausbildung der Aufnahmeöffnung am Knickarm bzw. die innen liegende Anlenkung des Knickzylinders am Knickarm nicht die ganze Länge des Knickarmes für die Aufnahme eines im Knickarm verfahrbar angeordneten Teleskoparmes zur Verfügung steht, wodurch die Reichweite des Kranes beschränkt ist.These quite practical solutions have the disadvantage that the entire length of the articulated arm for receiving a telescopically movable in the articulated arm telescopic arm is available through the formation of the receiving opening on the articulated arm or the inner articulation of the articulated cylinder on the articulated arm, whereby the range of Cranes is limited.

Die Erfindung hat es sich daher zur Aufgabe gemacht, einen gattungsgemäßen Kran zu schaffen, mit dem in einfacher Weise eine Verlängerung der Reichweite des Kranes möglich ist und der insgesamt eine einfache konstruktive Lösung darstellt.The invention has therefore taken on the task of creating a generic crane, with a simple way to extend the reach of the crane is possible and the overall represents a simple constructive solution.

Erfindungsgemäß wird dies dadurch erreicht, dass der Knickarm als Formrohr ausgebildet ist, in dem ein Teleskoparm verfahrbar gelagert ist, wobei sich der Aufnahmebereich des Knickarmes für den Teleskoparm im Wesentlichen, vorzugsweise direkt, bis zur Gelenkverbindung mit dem Hubarm erstreckt.According to the invention this is achieved in that the articulated arm is designed as a forming tube in which a telescopic arm is movably mounted, wherein the receiving area of the Knickarmes for the telescopic arm substantially, preferably directly, extends to the hinge connection with the lift arm.

Dadurch wird zum einen erreicht, dass im Wesentlichen die gesamte Länge des Knickarmes zur Aufnahme eines Teleskoparmes zur Verfügung steht. Ist also der Knickarm als Formrohr, beispielsweise mit einem rechteckigen, vieleckigen oder ovalen Querschnitt, in dem ein Teleskoparm verfahrbar gelagert ist, ausgebildet, kann der Teleskoparm im Wesentlichen gleich lang ausgebildet sein wie der Knickarm, während beim Stand der Technik der Teleskoparm - bedingt durch die im Endbereich des Knickarmes angeordnete Aufnahmeöffnung für den Hubarm - kürzer als der Knickarm ausgebildet werden musste. Mit der Erfindung ergibt sich also eine Verlängerung der Reichweite, die je nach Auslegecharakteristik des Kranes zwischen 30 cm und 120 cm betragen kann.As a result, on the one hand, it is achieved that substantially the entire length of the articulated arm is available for receiving a telescopic arm. Thus, if the articulated arm as a forming tube, for example, with a rectangular, polygonal or oval cross-section, in which a telescopic arm is movably mounted formed, the telescopic arm can be formed substantially the same length as the articulated arm, while in the prior art, the telescopic arm - due arranged in the end region of the articulated arm receiving opening for the lift arm - shorter than the articulated arm had to be formed. With the invention thus results in an extension of the range, which can be between 30 cm and 120 cm depending on the design characteristics of the crane.

Ein weiterer Vorteil der Erfindung ergibt sich durch die Anordnung des Knickzylinders. Betrachtet man das zwischen den beiden Anlenkpunkten des Knickzylinders und der Drehachse zwischen dem Hubarm und dem Knickarm ausgebildete Gelenksdreieck, dessen Basis vom Knickzylinder gebildet wird, ist man bisher davon ausgegangen, dass der kürzere der beiden zwischen den beiden Anlenkpunkten des Knickzylinders und der Drehachse der Gelenkverbindung gebildete Schenkel an jenem Arm des Gelenkarmsystems anzuordnen ist, an dem die Aufnahmeöffnung für den zweiten Arm des Gelenkarmsystems ausgebildet ist. Würde man diesem Prinzip folgen, ergäbe sich bei der erfindungsgemäßen Anordnung des Aufnahmeabschnittes am Hubarm ein maximaler Bewegungswinkel für den Knickzylinder von etwa 310 bis 320°.Another advantage of the invention results from the arrangement of the articulated cylinder. If one considers the joint triangle formed between the two articulation points of the articulated cylinder and the axis of rotation between the lifting arm and the articulated arm, whose base is formed by the articulated cylinder, it has hitherto been assumed that the shorter of the two between the two articulation points of the articulated cylinder and the axis of rotation of the articulated connection formed leg is to be arranged on that arm of the Gelenkarmsystems on which the receiving opening for the second arm of the Gelenkarmsystems is formed. If one followed this principle, would result in the inventive arrangement of the receiving portion on the lift arm, a maximum angle of movement for the buckling cylinder of about 310 to 320 °.

Durch die erfindungsgemäße Anordnung sowohl des Aufnahmeabschnittes für den zweiten Arm des Gelenkarmsystems am Hubarm als auch des längeren Schenkels des Gelenkdreiecks am Hubarm kann dieser Nachteil vermieden und ein kleinerer maximaler Bewegungswinkel für den Knickzylinder erreicht werden, wodurch insgesamt eine einfachere Konstruktion ermöglicht wird.The inventive arrangement of both the receiving portion for the second arm of the Gelenkarmsystems on the lift arm and the longer leg of the hinge triangle on the lift this disadvantage can be avoided and a smaller maximum travel angle can be achieved for the articulated cylinder, creating a simpler construction is possible.

Gemäß einem weiteren Ausführungsbeispiel der Erfindung ist der Bewegungswinkel, den der Knickzylinder zwischen seinen beiden Endstellungen einschließt kleiner 80°, vorzugsweise kleiner 60°, wobei ein bevorzugtes Ausführungsbeispiel der Erfindung vorsieht, dass der Bewegungswinkels des Knickzylinders zwischen 20° und 50°, vorzugsweise bei etwa 35°, liegt.According to a further embodiment of the invention, the angle of movement which the articulated cylinder between its two end positions includes less than 80 °, preferably less than 60 °, a preferred embodiment of the invention provides that the movement angle of the articulated cylinder between 20 ° and 50 °, preferably at about 35 °, lies.

Gemäß der Erfindung ist vorgesehen, dass der Abstand zwischen der Drehachse der Gelenkverbindung und dem Anlenkpunkt des Knickzylinders am Hubarm größer ist als der Abstand zwischen der Drehachse der Gelenkverbindung und dem Anlenkpunkt des Knickzylinders am Knickarm. Dabei hat es sich als günstig herausgestellt, wenn das Verhältnis des Abstandes zwischen der Drehachse der Gelenkverbindung und dem Anlenkpunkt des Knickzylinders am Hubarm zum Abstand zwischen der Drehachse der Gelenkverbindung und dem Anlenkpunkt des Knickzylinders am Knickarm zwischen 4:1 und 1.5:1, vorzugsweise zwischen 3:1 und 2:1 liegt.According to the invention, it is provided that the distance between the axis of rotation of the articulated connection and the articulation point of the articulated cylinder on the lifting arm is greater than the distance between the axis of rotation of the articulated connection and the articulation point of the articulated cylinder on the articulated arm. It has proved to be advantageous if the ratio of the distance between the axis of rotation of the articulated connection and the articulation point of the articulated cylinder on the lifting arm to the distance between the axis of rotation of the articulated connection and the articulation point of the articulated cylinder at the articulated between 4: 1 and 1.5: 1, preferably between 3: 1 and 2: 1 is.

Ein weiteres Ausführungsbeispiel der Erfindung, mit der das Zusammenklappen des Krans in seine Z-Form auf einfache Weise realisierbar ist, sieht vor, dass der wenigstens eine Knickzylinder seitlich außen liegend am Hubarm und am Knickarm drehbeweglich angelenkt ist, wobei es sich als günstig erwiesen hat, wenn der Kran zwei Knickzylinder aufweist, die an gegenüberliegenden Seiten am Hubarm und am Knickarm angelenkt sind. Dadurch und durch die erfindungsgemäße Anordnung des Knickzylinders wird es zudem ermöglicht, dass gemäß einem weiteren Ausführungsbeispiel der Erfindung der (die) Anlenkpunkt(e) des (der) Knickzylinder(s) am Hubarm außerhalb des Aufnahmeabschnittes für den Knickarm angeordnet ist (sind), wodurch sich insgesamt eine robustere Konstruktion ergibt, da ja die Einlenkung der Kräfte nicht mehr wie beim Stand der Technik in den offenen Aufnahmeabschnitt eines der beiden Arme des Gelenkarmsystems erfolgt.A further embodiment of the invention, with which the collapse of the crane in its Z-shape can be realized in a simple manner, provides that the at least one articulated cylinder is hinged laterally outwardly on the lifting arm and the articulated arm, wherein it has proved to be favorable when the crane has two articulated cylinders articulated on opposite sides on the lift arm and the articulated arm. This and the inventive arrangement of the articulated cylinder, it is also possible that according to a further embodiment of the invention, the (the) articulation point (s) of the (the) articulated cylinder (s) is arranged on the lifting arm outside the receiving portion for the articulated arm (are), which results in a more robust overall construction, since the deflection of the forces no longer takes place, as in the prior art, into the open receiving section of one of the two arms of the articulated arm system.

Weitere Einzelheiten und Vorteile der vorliegenden Erfindung werden anhand der Figurenbeschreibung unter Bezugnahme auf die in der Zeichnung dargestellten Ausführungsbeispiele im Folgenden näher erläutert. Darin zeigt:

Fig. 1
ein erstes Ausführungsbeispiel eines erfindungsgemäßen Fahrzeugkranes,
Fig. 2a, 2b
eine Seitenansicht und eine Draufsicht auf das Gelenkarmsystem des Ausführungsbeispieles nach Fig. 1 in einer ersten Stellung,
Fig. 3a, 3b
eine Seitenansicht und eine Perspektive des Gelenkarmsystems des Ausführungsbeispiels gemäß Fig. 1 in einer zweiten Position und
Fig. 4
im Prinzip das zwischen den Anlenkpunkten und der Drehachse gebildete Gelenkdreieck.
Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawing. It shows:
Fig. 1
A first embodiment of a vehicle crane according to the invention,
Fig. 2a, 2b
a side view and a plan view of the Gelenkarmsystem of the embodiment according to Fig. 1 in a first position,
Fig. 3a, 3b
a side view and a perspective of the Gelenkarmsystems of the embodiment according to Fig. 1 in a second position and
Fig. 4
in principle, the joint triangle formed between the articulation points and the axis of rotation.

Der in Fig. 1 dargestellte Kran 1 ist als Fahrzeugkran ausgebildet, der auf einer an einem Fahrzeug angeordneten bzw. anordenbaren Basis 14 montiert ist. Der Kran 1 weist eine Kransäule 2 auf, die an der Basis 14 um eine vertikale Achse drehbar gelagert ist. Mit der Kransäule 2 ist über die Gelenkverbindung 15 das Gelenkarmsystem 3 drehgelenkig verbunden und zwar um eine zur Hauptebene des Kranes 1 im Wesentlichen normale Drehachse 16. Zum Bewegen des Gelenkarmsystems 3 in Bezug auf die Kransäule 2 ist ein zwischen der Kransäule 2 und dem Gelenkarmsystem 3 wirkender Hubzylinder 6 vorgesehen.The in Fig. 1 illustrated crane 1 is designed as a vehicle crane, which is mounted on a arranged or arranged on a vehicle base 14. The crane 1 has a crane column 2, which is rotatably mounted on the base 14 about a vertical axis. The articulated arm system 3 is pivotally connected to the crane column 2 via the articulated connection 15, namely about an axis of rotation 16 which is essentially normal to the main plane of the crane 1. For moving the articulated arm system 3 with respect to the crane column 2, a provided between the crane column 2 and the Gelenkarmsystem 3 acting lifting cylinder 6.

Das Gelenkarmsystem 3 weist beim dargestellten Ausführungsbeispiel einen Hubarm 4 und einen mit dem Hubarm 4 drehgelenkig verbundenen Knickarm 5 auf, wobei die Anordnung der Drehachse 10 der Gelenkverbindung 8 zwischen dem Hubarm 4 und dem Knickarm 5 derart erfolgt, dass - analog zur Gelenkverbindung 15 zwischen der Kransäule 2 und dem Gelenkarmsystem 3 - die beiden Ober die Gelenkverbindung 8 bzw. 15 verbundenen Arme 4, 5 im zusammengeklappten Zustand im Wesentlichen in einer Ebene zu liegen kommen, wobei - wie aus der Fig. 1 ersichtlich - die Kransäule 2, der Hubarm 4 und der Knickarm 5 des Kranes 1 im zusammengeklappten Zustand Z-förmig angeordnet sind.The Gelenkarmsystem 3 has in the illustrated embodiment, a lifting arm 4 and a pivotally connected to the lifting arm 4 articulated arm 5, wherein the arrangement of the axis of rotation 10 of the articulated connection 8 between the lifting arm 4 and the articulated arm 5 is such that - analogous to the articulation 15 between the Crane column 2 and the Gelenkarmsystem 3 - the two upper the articulated connection 8 and 15 connected arms 4, 5 come to rest in the folded state substantially in a plane, wherein - as from Fig. 1 seen - the crane column 2, the lifting arm 4 and the articulated arm 5 of the crane 1 are arranged in the folded state Z-shaped.

Weiters sind zwei zwischen dem Hubarm 4 und dem Knickarm 5 wirkende Knickzylinder 7, 7' (siehe Fig. 2b) an gegenüber liegenden Seiten außen am Hubarm 4 und am Knickarm 5 angelenkt, über die die Schwenkbewegung des Knickarmes 5 in Bezug auf den Hubarm 4 realisiert wird. Der Knickarm 5 ist als Formrohr ausgebildet, in dem ein Teleskoparm 13 verfahr- bzw. verschiebbar gelagert ist.Furthermore, two acting between the lifting arm 4 and the articulated arm 5 buckling cylinders 7, 7 '(see Fig. 2b ) hinged on opposite sides outside the lifting arm 4 and the articulated arm 5, via which the pivotal movement of the articulated arm 5 is realized with respect to the lifting arm 4. The articulated arm 5 is formed as a forming tube, in which a telescopic arm 13 is mounted movable or displaceable.

Die Fig. 2a und 2b zeigen das Gelenkarmsystem 3 in ausgestrecktem Zustand, d.h. der Hubarm 4 und der Knickarm 5 liegen im Wesentlichen auf einer Geraden. Der Knickzylinder 7. der die Basis des Gelenkdreieckes zwischen den Anlenkpunkten 11 und 12 sowie der Drehachse 10 bildet, ist dabei derart angeordnet, dass der Abstand a zwischen dem Anlenkpunkt 11 des Knickzylinders 7 am Hubarm 4 und der Drehachse 10 in etwa 2 ½ bis 3 mal so groß ist wie der Abstand b zwischen dem Anlenkpunkt 12 des Knickzylinders 7 am Knickarm 5 und der Drehachse 10. Anders ausgedrückt befindet sich der lange Schenkel des Gelenkdreiecks am Hubarm 4, während der kurze Schenkel des Gelenkdreieckes, der auch als Momentenhebel bezeichnet wird, am Knickarm 5 ausgebildet ist.The Fig. 2a and 2b show the Gelenkarmsystem 3 in the extended state, ie the lift arm 4 and the articulated arm 5 are substantially on a straight line. The articulated cylinder 7 which forms the base of the articulation triangle between the articulation points 11 and 12 and the axis of rotation 10 is arranged such that the distance a between the articulation point 11 of the articulated cylinder 7 on the lifting arm 4 and the axis of rotation 10 in about 2 ½ to 3 times as large as the distance b between the articulation point 12 of the articulated cylinder 7 on the articulated arm 5 and the axis of rotation 10. In other words, the long leg of the articulated triangle is on the lifting arm 4, while the short leg of the articulation triangle, which is also referred to as a moment lever, is formed on the articulated arm 5.

Insbesondere aus Fig. 2b ist ersichtlich, dass am Hubarm 4 ein Aufnahmeabschnitt 9 für den Knickarm 5 ausgebildet ist, und zwar im Bereich der Gelenkverbindung 8. Aufgrund dieser Anordnung steht nahezu die gesamte Länge des als Formrohr ausgebildeten Knickarmes 5 als Aufnahmebereich für den im Knickarm 5 verfahrbar bzw. verschiebbar gelagerten Teleskoparm 13 zur Verfügung, wodurch sich gegenüber dem Stand der Technik eine Reichweitenverlängerung des Kranes 1 von bis zu 1,20 m ergibt.In particular from Fig. 2b It can be seen that on the lifting arm 4, a receiving portion 9 is formed for the articulated arm 5, in the region of the articulated joint 8. Due to this arrangement is almost the entire length of the formed as a forming tube articulated arm 5 as a receiving area for the articulated arm 5 movable or displaceable mounted telescopic arm 13 available, which results in relation to the prior art, a range extension of the crane 1 of up to 1.20 m.

Die Fig. 3a und 3b zeigen das Gelenkarmsystem 3 in einer Endstellung bei vollkommen eingefahrenem Knickzylinder 7. Dabei greift der Knickarm 5 in den gabelförmig ausgebildeten Aufnahmeabschnitt 9 des Hubarmes 4 ein, wobei der seitlich am Knickarm 5 angeordnete Anlenkpunkt 12 als Anschlag dient und damit die Schwenkbewegung des Knickarmes 5 begrenzt.The Fig. 3a and 3b In this case, the articulated arm 5 engages in the fork-shaped receiving portion 9 of the lifting arm 4, wherein the side of the articulated arm 5 arranged articulation point 12 serves as a stop and thus limits the pivotal movement of the articulated arm 5.

In Fig. 4 ist schematisch die Schwenkcharakteristik des Gelenkarmsystems 3 gezeigt. Der Hubarm 4 und der Knickarm 5 sind über die Drehachse 10 drehgelenkig miteinander verbunden, wobei die gegenseitige Schwenkbewegung über den Knickzylinder 7 erfolgt, der am Hubarm 4 im Anlenkpunkt 11 und am Knickarm 5 im Anlenkpunkt 12 angelenkt ist. Dabei erfolgt die Anlenkung des Knickzylinders am Hubarm 4 bzw. am Knickarm 5 derart, dass der Abstand a zwischen dem Anlenkpunkt 11 und der Drehachse 10 größer, vorzugsweise ungefähr 2½ mal so groß wie der Abstand b zwischen dem Anlenkpunkt 12 und der Drehachse 10 ist. Durch diese Anordnung ergibt sich ein maximaler Bewegungswinkel α für den Knickzylinder 7, der durch die beiden Endstellungen E, E' des Knickzylinders 7 begrenzt wird, der kleiner als 80° ist und vorzugsweise bei etwa 35° liegt.In Fig. 4 schematically the pivoting characteristic of the Gelenkarmsystems 3 is shown. The lifting arm 4 and the articulated arm 5 are pivotally connected to each other via the axis of rotation 10, wherein the mutual pivoting movement takes place via the articulation cylinder 7, which is articulated on the lifting arm 4 in the articulation point 11 and the articulated arm 5 in the articulation point 12. The articulation of the articulated cylinder on the lifting arm 4 and the articulated arm 5 is such that the distance a between the articulation point 11 and the axis of rotation 10 is greater, preferably about 2½ times as large as the distance b between the articulation point 12 and the axis of rotation 10. By this arrangement results in a maximum angle of movement α for the buckling cylinder 7, which is limited by the two end positions E, E 'of the buckling cylinder 7, which is smaller than 80 ° and preferably at about 35 °.

Der maximale Bewegungswinkel β des Knickarmes 5, der durch die beiden Endstellungen des Knickarmes 5 definiert wird, liegt - wie auch bei den bereits aus dem Stand der Technik bekannten Lösungen - bei ca. 310°. Dieser Bewegungswinkel β ist Voraussetzung dafür, dass gattungsgemäße Kräne im zusammengeklappten Zustand Z-förmig angeordnet werden können.The maximum travel angle β of the articulated arm 5, which is defined by the two end positions of the articulated arm 5, is - as in the already known from the prior art solutions - at about 310 °. This movement angle β is a prerequisite for allowing generic cranes to be arranged Z-shaped in the folded state.

Wenn auch die Erfindung anhand des Ausführungsbeispieles konkret beschreiben wurde, versteht es sich von selbst, dass der Anmeldungsgegenstand nicht auf dieses Ausführungsbeispiel beschränkt ist. Vielmehr sind Maßnahmen und Abwandlungen, die dazu dienen, den Erfindungsgedanken eines Z-förmig zusammenklappbaren Kranes mit verlängerter Reichweite umzusetzen, durchaus denkbar und erwünscht. So ist der erfindungsgemäße Kran keinesfalls auf Fahrzeugkräne beschränkt, d.h. die Basis für die Kransäule kann durchaus auch ortsfest gelagert sein, wie dies in der Schrottverwertung häufig der Fall ist.Although the invention has been described concretely with reference to the embodiment, it goes without saying that the subject of the application is not limited to this embodiment. Rather, measures and modifications that serve to implement the inventive concept of a Z-shaped collapsible crane with extended range, quite conceivable and desirable. Thus, the crane according to the invention is by no means limited to mobile cranes, i. the base for the crane column can also be stored stationary, as is often the case in scrap recycling.

Claims (7)

  1. A foldable crane (1), in particular a vehicle crane, comprising a rotatably mounted crane column (2), a pivotal arm system (3) which is pivotably mounted thereto and which has a lift arm (4) and a telescopic articulated arm (5) rotatably hingedly connected to the lift arm (4), at least one lift cylinder (6) acting between the crane column (2) and the lift arm (4) and at least one articulation cylinder (7) acting between the lift arm (4) and the articulated arm (5), wherein the crane column (2), the lift arm (4) and the articulated arm (5) are arranged in a Z-shape in the folded-together condition of the crane and the lift arm (4) in the region of its pivotal connection (8) to the articulated arm (5) has a preferably forked receiving portion (9) for the articulated arm (5), wherein the spacing (a) between the axis of rotation (10) of the pivotal connection (8) and the pivotal mounting point (11) of the articulation cylinder (7) on the lift arm (4) is greater than the spacing (b) between the axis of rotation (10) of the pivotal connection (8) and the pivotal mounting point (12) of the articulation cylinder (7) on the articulated arm (5), characterised in that the articulated arm (5) is in the form of a shaped tube in which a telescopic arm (13) is displaceably mounted, wherein the receiving region of the articulated arm (4) for the telescopic arm (13) extends substantially preferably directly to the pivotal connection (8) to the lift arm (4).
  2. A crane according to claim 1 characterised in that the at least one articulation cylinder (7) is rotatably pivotably connected in laterally outwardly disposed relationship to the lift arm (4) and to the articulated arm (5).
  3. A crane according to claim 2 characterised by two articulation cylinders (7, 7') which are pivotably mounted at opposite sides to the lift arm (4) and to the articulated arm (5).
  4. A crane according to one of claims 1 to 3 characterised in that the pivotal mounting point or points (11, 11') of the articulation cylinder or cylinders (7, 7') on the lift arm (4) is or are arranged outside the receiving portion (9) for the articulated arm (5).
  5. A crane according to one of claims 1 to 4 characterised in that the angle of movement (α) which the articulation cylinder or cylinders (7, 7') includes or include between the two end positions (E. E') thereof is less than 80°, preferably less than 60°.
  6. A crane according to claim 5 characterised in that the angle of movement (α) of the articulation cylinder (7, 7') is between 20° and 50°, preferably at about 35°.
  7. A crane according to one of claims 1 to 6 characterised in that the ratio of the spacing (a) between the axis of rotation (10) of the pivotal connection (8) and the pivotal mounting point (11, 11') of the articulation cylinder (7) on the lift arm (4) to the spacing (b) between the axis of rotation (10) of the pivotal connection (8) and the pivotal mounting point (12, 12') of the articulation cylinder (7, 7') on the articulated arm (5) is between 4:1 and 1.5:1, preferably between 3:1 and 2:1.
EP05021285A 2005-09-29 2005-09-29 Foldable crane Active EP1770050B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SI200530943T SI1770050T1 (en) 2005-09-29 2005-09-29 Foldable crane
DE502005008754T DE502005008754D1 (en) 2005-09-29 2005-09-29 Folding crane
EP05021285A EP1770050B1 (en) 2005-09-29 2005-09-29 Foldable crane
AT05021285T ATE452853T1 (en) 2005-09-29 2005-09-29 FOLDING CRANE
ES05021285T ES2337262T3 (en) 2005-09-29 2005-09-29 REBATIBLE CRANE.
DK05021285.1T DK1770050T3 (en) 2005-09-29 2005-09-29 Collapsible crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05021285A EP1770050B1 (en) 2005-09-29 2005-09-29 Foldable crane

Publications (2)

Publication Number Publication Date
EP1770050A1 EP1770050A1 (en) 2007-04-04
EP1770050B1 true EP1770050B1 (en) 2009-12-23

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EP05021285A Active EP1770050B1 (en) 2005-09-29 2005-09-29 Foldable crane

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EP (1) EP1770050B1 (en)
AT (1) ATE452853T1 (en)
DE (1) DE502005008754D1 (en)
DK (1) DK1770050T3 (en)
ES (1) ES2337262T3 (en)
SI (1) SI1770050T1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3248928A1 (en) 2016-05-24 2017-11-29 EPSILON Kran GmbH. Z-shaped foldable crane
EP4474333A1 (en) 2023-06-05 2024-12-11 EPSILON Kran GmbH. Crane

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Publication number Priority date Publication date Assignee Title
IES20070639A2 (en) * 2007-09-07 2011-02-16 Vincent Southall Articulated mechanical arm
CN102358581B (en) * 2011-09-14 2013-02-13 哈尔滨东建机械制造有限公司 Single-rope three-section type horizontal suspension arm folding buffering and self-locking device
CN102431910B (en) * 2011-12-12 2013-07-24 廊坊凯博建设机械科技有限公司 Arm rack overhead automatic folding and unfolding mechanism of tri-fold arm tower crane and folding and unfolding method thereof
EP2789566B1 (en) 2013-04-11 2019-07-10 HMF Group A/S Foldable crane
CN106315422B (en) * 2016-08-29 2017-10-20 镇江维斯特船用设备有限公司 A kind of extra large work crane of electric hydaulic folding-jib
SI25474A (en) * 2017-07-03 2019-01-31 Tajfun Liv, Proizvodnja In Razvoj D.O.O. Crane or similar manupulating apparatus with integrated assembly for overcoming each dead position between primary and secondary part of its operational arm
FR3105200B1 (en) * 2019-12-24 2021-12-03 Reel Knuckle boom crane, for offshore application

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DE2748672A1 (en) * 1976-12-10 1978-06-15 Hiab Foco Ab DEVICE ON LOADING CRANES

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US3024920A (en) * 1957-05-28 1962-03-13 Hydrauliska Ind Aktiebolaget Hydraulic jack
US3032206A (en) * 1960-02-23 1962-05-01 Humboldt Company Mobilized lifting and loading boom
FR2331511A1 (en) * 1975-11-14 1977-06-10 Brun Jean Louis Link between crane jib sections - has links pivoting on section ends and allowing movement through full circle
FI68208C (en) * 1983-08-29 1985-08-12 Fiskars Ab Oy LYFTKRAN
SE470437B (en) * 1992-08-04 1994-03-07 Hiab Ab Rocker arm crane with linkage device that switches the waypoint between the work area and the parking position

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Publication number Priority date Publication date Assignee Title
DE2748672A1 (en) * 1976-12-10 1978-06-15 Hiab Foco Ab DEVICE ON LOADING CRANES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3248928A1 (en) 2016-05-24 2017-11-29 EPSILON Kran GmbH. Z-shaped foldable crane
EP4474333A1 (en) 2023-06-05 2024-12-11 EPSILON Kran GmbH. Crane

Also Published As

Publication number Publication date
EP1770050A1 (en) 2007-04-04
ATE452853T1 (en) 2010-01-15
ES2337262T3 (en) 2010-04-22
DK1770050T3 (en) 2010-03-15
DE502005008754D1 (en) 2010-02-04
SI1770050T1 (en) 2010-04-30

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