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EP1770050A1 - Foldable crane - Google Patents

Foldable crane Download PDF

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Publication number
EP1770050A1
EP1770050A1 EP05021285A EP05021285A EP1770050A1 EP 1770050 A1 EP1770050 A1 EP 1770050A1 EP 05021285 A EP05021285 A EP 05021285A EP 05021285 A EP05021285 A EP 05021285A EP 1770050 A1 EP1770050 A1 EP 1770050A1
Authority
EP
European Patent Office
Prior art keywords
articulated
arm
cylinder
crane
lifting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05021285A
Other languages
German (de)
French (fr)
Other versions
EP1770050B1 (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
STEINDL KRANTECHNIK 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 Steindl Krantechnik Gesmbh, STEINDL KRANTECHNIK GmbH filed Critical Steindl Krantechnik Gesmbh
Priority to DK05021285.1T priority Critical patent/DK1770050T3/en
Priority to ES05021285T priority patent/ES2337262T3/en
Priority to EP05021285A priority patent/EP1770050B1/en
Priority to AT05021285T priority patent/ATE452853T1/en
Priority to SI200530943T priority patent/SI1770050T1/en
Priority to DE502005008754T priority patent/DE502005008754D1/en
Publication of EP1770050A1 publication Critical patent/EP1770050A1/en
Application granted granted Critical
Publication of EP1770050B1 publication Critical patent/EP1770050B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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, in particular a mobile crane, with a rotatably mounted crane column, a hinged thereto Gelenkarmsystem having a lifting arm and a pivotally connected to the lifting arm, in particular telescopic articulated arm, at least one acting between the crane column and the lift arm and at least one lifting cylinder acting between the lifting arm and the articulated buckling cylinder, the crane column, the lifting arm and the articulated arm are arranged in the folded state of the crane Z-shaped.
  • Such cranes are known per se and are used for example in forestry or scrap recycling.
  • 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.
  • 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 lifting arm in the region of its articulated connection with the articulated arm has a preferably fork-shaped receiving portion for the articulated arm and 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.
  • the articulated arm as a shaping tube, beispelleria with a rectangular, polygonal or oval cross-section, in which a telescopic arm is movably mounted, formed, wherein the receiving portion of the articulated arm for the telescopic arm substantially, preferably directly, extends to the articulation with the lifting arm, the telescopic arm can be formed substantially equal length as the articulated arm, while in the prior art, the telescopic arm - had to be formed shorter than the articulated arm - due to the arranged in the end of the articulated arm receiving opening for the lifting arm.
  • 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 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.
  • 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 lift 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 crane 1 shown in FIG. 1 is designed as a vehicle crane, which is mounted on a base 14 which can be arranged or arranged on a vehicle.
  • 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 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 articulated connection 8 and 15 connected arms 4, 5 come to rest in the folded state substantially in a plane, wherein - as seen from Fig. 1 - the crane column 2, the lifting 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.
  • Figs. 2a and 2b show the articulated arm system 3 in an extended state, i. the lifting arm 4 and the articulated arm 5 are essentially on a straight line.
  • the buckling cylinder 7, which forms the base of the articulated 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 21 ⁇ 2 to 3 times is the same 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 joint triangle on the lifting arm 4 while the short leg of the joint triangle, which is also referred to as a moment lever on Knickarm 5 is formed.
  • 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 displaceably 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 laterally arranged on the articulated arm 5 pivot point 12 serves as a stop and thus the Swivel movement of the articulated arm 5 limited.
  • Fig. 4 the pivotal characteristic of the Gelenkarmsystems 3 is shown schematically.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (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, insbesondere Fahrzeugkran, mit einer drehbar gelagerten Kransäule, einem daran angelenkten Gelenkarmsystem, das einen Hubarm und einen mit dem Hubarm drehgelenkig verbundenen, insbesondere teleskopierbaren Knickarm aufweist, wenigstens einem zwischen der Kransäule und dem Hubarm wirkenden Hubzylinder sowie wenigstens einem zwischen dem Hubarm und dem Knickarm wirkenden Knickzylinder, wobei die Kransäule, der Hubarm und der Knickarm im zusammengeklappten Zustand des Krans Z-förmig angeordnet sind.The invention relates to a folding crane, in particular a mobile crane, with a rotatably mounted crane column, a hinged thereto Gelenkarmsystem having a lifting arm and a pivotally connected to the lifting arm, in particular telescopic articulated arm, at least one acting between the crane column and the lift arm and at least one lifting cylinder acting between the lifting arm and the articulated buckling cylinder, the crane column, the lifting arm and the articulated arm are arranged in the folded state of the crane Z-shaped.

Derartige Kräne sind an sich bekannt und kommen beispielsweise in der Forstwirtschaft oder der Schrottverwertung 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 scrap recycling. 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.

Diese durchaus praktikablen Lösungen weisen den Nachteil auf, dass durch die Ausbildung der Aufnahmeöffnung am Knickarm nicht mehr die ganze Länge des Knickarmes für die Aufnahme eines im Knickarm verfahrbar angeordneten Teleskoparmes zur Verfügung steht, wodurch sich die Reichweite des Kranes beschränkt ist.These quite practical solutions have the disadvantage that is no longer the entire length of the articulated arm for receiving a movably arranged in the articulated arm telescopic arm is available through the formation of the receiving opening on the articulated arm, whereby the range of the crane 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 Hubarm im Bereich seiner Gelenkverbindung mit dem Knickarm einen vorzugsweise gabelförmigen Aufnahmeabschnitt für den Knickarm aufweist und 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.This is achieved according to the invention in that the lifting arm in the region of its articulated connection with the articulated arm has a preferably fork-shaped receiving portion for the articulated arm and 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.

Dadurch wird zum einen erreicht, dass im Wesentlichen die gesamte Länge des Knickarmes zur Aufnahme eines Teleskoparmes zur Verfügung steht. Ist also, wie ein weiteres Ausführungsbeispiel der Erfindung vorsieht, der Knickarm als Formrohr, beispellsweise mit einem rechteckigen, vieleckigen oder ovalen Querschnitt, in dem ein Teleskoparm verfahrbar gelagert ist, ausgebildet, wobei sich der Aufnahmebereich des Knickarmes für den Teleskoparm im Wesentlichen, vorzugsweise direkt, bis zur Gelenkverbindung mit dem Hubarm erstreckt, 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, as a further embodiment of the invention provides, the articulated arm as a shaping tube, beispellsweise with a rectangular, polygonal or oval cross-section, in which a telescopic arm is movably mounted, formed, wherein the receiving portion of the articulated arm for the telescopic arm substantially, preferably directly, extends to the articulation with the lifting arm, the telescopic arm can be formed substantially equal length as the articulated arm, while in the prior art, the telescopic arm - had to be formed shorter than the articulated arm - due to the arranged in the end of the articulated arm receiving opening for the lifting arm. 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 joint triangle on the lift arm of 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 einer weiteren Ausführungsform der Erfindung liegt 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.According to a further embodiment of the invention, 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.

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 lift 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
1 is a side view and a plan view of the Gelenkarmsystem of the embodiment of FIG. 1 in a first position,
Fig. 3a, 3b
a side view and a perspective of the articulated arm system of the embodiment of 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 crane 1 shown in FIG. 1 is designed as a vehicle crane, which is mounted on a base 14 which can be arranged or arranged on a vehicle. 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, 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 articulated connection 8 and 15 connected arms 4, 5 come to rest in the folded state substantially in a plane, wherein - as seen from Fig. 1 - the crane column 2, the lifting 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 bending cylinder 7, 7 '(see Fig. 2b) articulated on opposite sides outside the lifting arm 4 and the articulated arm 5, via which the pivotal movement of the articulated arm 5 with respect to the lifting arm 4th is realized. 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 2½ 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.Figs. 2a and 2b show the articulated arm system 3 in an extended state, i. the lifting arm 4 and the articulated arm 5 are essentially on a straight line. The buckling cylinder 7, which forms the base of the articulated 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 2½ to 3 times is the same 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 joint triangle on the lifting arm 4, while the short leg of the joint triangle, which is also referred to as a moment lever on Knickarm 5 is formed.

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 is seen that 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 displaceably 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 articulated arm 5 engages in the fork-shaped receiving portion 9 of the lifting arm 4, wherein the laterally arranged on the articulated arm 5 pivot point 12 serves as a stop and thus the Swivel movement of the articulated arm 5 limited.

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, the pivotal characteristic of the Gelenkarmsystems 3 is shown schematically. 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 (8)

Klappbarer Kran, insbesondere Fahrzeugkran, mit einer drehbar gelagerten Kransäule, einem daran angelenkten Gelenkarmsystem, das einen Hubarm und einen mit dem Hubarm drehgelenkig verbundenen, insbesondere teleskopierbaren Knickarm aufweist, wenigstens einem zwischen der Kransäule und dem Hubarm wirkenden Hubzylinder sowie wenigstens einem zwischen dem Hubarm und dem Knickarm wirkenden Knickzylinder, wobei die Kransäule, der Hubarm und der Knickarm im zusammengeklappten Zustand des Krans Z-förmig angeordnet sind, dadurch gekennzeichnet, dass der Hubarm (4) im Bereich seiner Gelenkverbindung (8) mit dem Knickarm (5) einen vorzugsweise gabelförmigen Aufnahmeabschnitt (9) für den Knickarm (5) aufweist und der Abstand (a) zwischen der Drehachse (10) der Gelenkverbindung (8) und dem Anlenkpunkt (11) des Knickzylinders (7) am Hubarm (4) größer ist als der Abstand (b) zwischen der Drehachse (10) der Gelenkverbindung (8) und dem Anlenkpunkt (12) des Knickzylinders (7) am Knickarm (5).A foldable crane, in particular a mobile crane, with a rotatably mounted crane column, an articulated arm system articulated thereon, which has a lifting arm and a lifting arm connected to the lifting arm, in particular telescoping articulated arm, at least one lifting cylinder acting between the crane column and the lifting arm and at least one between the lifting arm and the buckling arm acting buckling cylinder, the crane column, the lifting arm and the articulated arm are arranged in the folded state of the crane Z-shaped, characterized in that the lifting arm (4) in the region of its articulated connection (8) with the articulated arm (5) preferably a fork-shaped Receiving portion (9) for the articulated arm (5) and the distance (a) between the axis of rotation (10) of the articulated connection (8) and the articulation point (11) of the articulated cylinder (7) on the lifting arm (4) is greater than the distance ( b) between the axis of rotation (10) of the articulated connection (8) and the articulation point (12) of the articulated cylinder (7) on the articulated arm (5). Kran nach Anspruch 1, dadurch gekennzeichnet, dass der wenigstens eine Knickzylinder (7) seitlich außen liegend am Hubarm (4) und am Knickarm (5) drehbeweglich angelenkt ist.Crane according to claim 1, characterized in that the at least one articulated cylinder (7) is articulated laterally outwardly on the lifting arm (4) and on the articulated arm (5) rotatably. Kran nach Anspruch 2, gekennzeichnet durch zwei Knickzylinder (7, 7'), die an gegenüberliegenden Seiten am Hubarm (4) und am Knickarm (5) angelenkt sind.Crane according to Claim 2, characterized by two articulated cylinders (7, 7 ') which are articulated on opposite sides on the lifting arm (4) and on the articulated arm (5). Kran nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der (die) Anlenkpunkt(e) (11, 11') des (der) Knickzylinder(s) (7, 7') am Hubarm (4) außerhalb des Aufnahmeabschnittes (9) für den Knickarm (5) angeordnet ist (sind),Crane according to one of claims 1 to 3, characterized in that the articulation point (s) (11, 11 ') of the articulated cylinder (s) (7, 7') on the lifting arm (4) outside the receiving portion (11). 9) for the articulated arm (5) is arranged (are), Kran nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Bewegungswinkel (α), den der (die) Knickzylinder (7, 7') zwischen seinen beiden Endstellungen (E, E') einschließt (einschließen), kleiner 80°, vorzugsweise kleiner 60°, ist.Crane according to one of claims 1 to 4, characterized in that the movement angle (α), the (the) buckling cylinder (7, 7 ') between its two end positions (E, E') includes (include), smaller 80 °, preferably less than 60 °, is. Kran nach Anspruch 5, dadurch gekennzeichnet, dass der Bewegungswinkel (α) des Knickzylinders (7, 7') zwischen 20° und 50°, vorzugsweise bei etwa 35°, liegt.Crane according to claim 5, characterized in that the movement angle (α) of the buckling cylinder (7, 7 ') between 20 ° and 50 °, preferably at about 35 °. Kran nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Verhältnis des Abstandes (a) zwischen der Drehachse (10) der Gelenkverbindung (8) und dem Anlenkpunkt (11, 11') des Knickzylinders (7) am Hubarm (4) zum Abstand (b) zwischen der Drehachse (10) der Gelenkverbindung (8) und dem Anlenkpunkt (12. 12') des Knickzylinders (7, 7') am Knickarm (5) zwischen 4:1 und 1,5:1, vorzugsweise zwischen 3:1 und 2:1, liegt.Crane according to one of claims 1 to 6, characterized in that the ratio of the distance (a) between the axis of rotation (10) of the articulated connection (8) and the articulation point (11, 11 ') of the articulated cylinder (7) on the lifting arm (4) to the distance (b) between the axis of rotation (10) of the articulated connection (8) and the articulation point (12 12 ') of the articulated cylinder (7, 7') on the articulated arm (5) between 4: 1 and 1.5: 1, preferably between 3: 1 and 2: 1. Kran nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Knickarm (5) als Formrohr ausgebildet ist, in dem ein Teleskoparm (13) verfahrbar gelagert ist, wobei sich der Aufnahmebereich des Knickarmes (5) für den Teleskoparm (13) im Wesentlichen, vorzugsweise direkt, bis zur Gelenkverbindung (8) mit dem Hubarm (4) erstreckt.Crane according to one of claims 1 to 7, characterized in that the articulated arm (5) is formed as a forming tube in which a telescopic arm (13) is movably mounted, wherein the receiving area of the articulated arm (5) for the telescopic arm (13) in Substantially, preferably directly, to the articulated connection (8) with the lifting arm (4).
EP05021285A 2005-09-29 2005-09-29 Foldable crane Active EP1770050B1 (en)

Priority Applications (6)

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

Applications Claiming Priority (1)

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

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

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DE (1) DE502005008754D1 (en)
DK (1) DK1770050T3 (en)
ES (1) ES2337262T3 (en)
SI (1) SI1770050T1 (en)

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WO2009031131A2 (en) * 2007-09-07 2009-03-12 Vincent Southall Articulated mechanical arm
CN102358581A (en) * 2011-09-14 2012-02-22 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
CN102431910A (en) * 2011-12-12 2012-05-02 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
EP2789566A1 (en) 2013-04-11 2014-10-15 HMF Group A/S Foldable crane
CN106315422A (en) * 2016-08-29 2017-01-11 镇江维斯特船用设备有限公司 Electric hydraulic folding arm type maritime work crane
WO2019009818A1 (en) * 2017-07-03 2019-01-10 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
FR3105200A1 (en) * 2019-12-24 2021-06-25 Reel Knuckle boom crane, for offshore application

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SI3248928T1 (en) 2016-05-24 2019-03-29 Epsilon Kran Gmbh. Z-shaped foldable crane

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009031131A2 (en) * 2007-09-07 2009-03-12 Vincent Southall Articulated mechanical arm
WO2009031131A3 (en) * 2007-09-07 2009-06-25 Vincent Southall Articulated mechanical arm
CN102358581A (en) * 2011-09-14 2012-02-22 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
CN102431910A (en) * 2011-12-12 2012-05-02 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
EP2789566A1 (en) 2013-04-11 2014-10-15 HMF Group A/S Foldable crane
CN106315422A (en) * 2016-08-29 2017-01-11 镇江维斯特船用设备有限公司 Electric hydraulic folding arm type maritime work crane
WO2019009818A1 (en) * 2017-07-03 2019-01-10 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
RU2752106C1 (en) * 2017-07-03 2021-07-22 Тайфун Лив, Производнйа Ин Развой Д.О.О. Crane or similar manipulating mechanism with built-in node for overcoming dead position between primary and secondary parts of its working boom
US11554940B2 (en) 2017-07-03 2023-01-17 Tajfun Liv, Proizvodnja In Razvoj D.O.O. Crane or similar manipulating apparatus with integrated assembly for overcoming each dead position between primary and secondary part of its operational arm
FR3105200A1 (en) * 2019-12-24 2021-06-25 Reel Knuckle boom crane, for offshore application
EP3842374A1 (en) * 2019-12-24 2021-06-30 Reel Articulated boom crane for offshore application
US20220073322A1 (en) * 2019-12-24 2022-03-10 Reel Knuckle boom crane, for offshore application
US11731863B2 (en) 2019-12-24 2023-08-22 Reel Knuckle boom crane, for offshore application

Also Published As

Publication number Publication date
SI1770050T1 (en) 2010-04-30
DE502005008754D1 (en) 2010-02-04
EP1770050B1 (en) 2009-12-23
ATE452853T1 (en) 2010-01-15
DK1770050T3 (en) 2010-03-15
ES2337262T3 (en) 2010-04-22

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