EP2371756B1 - Retention support - Google Patents
Retention support Download PDFInfo
- Publication number
- EP2371756B1 EP2371756B1 EP11002368.6A EP11002368A EP2371756B1 EP 2371756 B1 EP2371756 B1 EP 2371756B1 EP 11002368 A EP11002368 A EP 11002368A EP 2371756 B1 EP2371756 B1 EP 2371756B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fall
- carbon fiber
- accordance
- back support
- pressure rod
- 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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- 230000014759 maintenance of location Effects 0.000 title description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 74
- 239000004917 carbon fiber Substances 0.000 claims description 74
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 38
- 229910052782 aluminium Inorganic materials 0.000 claims description 38
- 239000002131 composite material Substances 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims 2
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 7
- 241000282693 Cercopithecidae Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
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
- B66C23/82—Luffing gear
-
- 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
- B66C23/66—Outer or upper end constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/702—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic with a jib extension boom
-
- 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
- B66C23/88—Safety gear
- B66C23/92—Snubbers or dashpots for preventing backwards swinging of jibs, e.g. in the event of cable or tackle breakage
Definitions
- Object of the present invention is therefore to provide a fallback support available, through which higher payloads can be achieved, in particular by reducing the weight of the push rod.
- a fallback support according to claim 1.
- This is a fall arrest support for a jib attached to a jib head of a crane with at least one push rod disposed between the jib and the jib head and limiting a relieving movement of the jib.
- the push rod comprises a fiber composite tube. The use of such a fiber composite tube as a push rod allows a significant weight reduction at the same compressive strength of the fallback support. As a result, the load of the boom can be increased accordingly or can be used a correspondingly larger and longer boom.
- the push rod comprises an aluminum tube with a reinforcement made of carbon fibers.
- a reinforcement made of carbon fibers The use of such an aluminum-carbon fiber composite as a push rod leads on the one hand to a high-strength yet lightweight push rod.
- the use of an aluminum tube allows easy connection of the push rod to the rest of the construction, eg. B. over tails, which are easily connected to the aluminum tube.
- the case of fiber reinforced Plastic pipes often problematic connection to the further construction is therefore considerably simplified.
- the carbon fiber blades surround the aluminum tube in the circumferential direction with intervals between them.
- weight can be saved because no continuous, running in the longitudinal direction of the aluminum tube carbon fiber reinforcement is used, but the carbon fiber slats each have a certain distance between each other.
- carbon fiber slats also facilitates the production of the push rod according to the invention, since these can be manufactured separately and then connected to the aluminum rod.
- the carbon fiber fins have a thickness in the radial direction, which is between 50% and 300% of the wall thickness of the aluminum tube be advantageously between 80% and 250%, more advantageously between 100% and 200%.
- more than three carbon fiber fins are provided, further advantageously more than five carbon fiber fins. Further advantageously, the number of carbon fiber fins is between three and twenty, more advantageously between five and twelve.
- the push rod may have a wrapping of carbon fibers in the circumferential direction at least in a partial region. Such a winding of carbon fibers allows a particularly effective damping of the push rod.
- the thickness of the coiling of carbon fibers in the radial direction is less than 70% of the wall thickness of the aluminum tube and / or the thickness of the carbon fiber fins, more advantageously less than 50%, more advantageously less than 30%.
- the thickness of the wrapping is more than 5% of the wall thickness of the aluminum tube, moreover advantageously more than 10%.
- no carbon fiber wrap is provided in the end regions of the aluminum tube.
- the carbon fiber fins are arranged on the winding of carbon fibers.
- the push rod thus has the following structure from inside to outside: an aluminum tube, one of the wrapping Carbon fiber layer formed in the circumferential direction and arranged on this wrapping carbon fiber fins.
- an aluminum-carbon fiber composite tube allows a particularly simple connection of the push rod via end pieces, which are connected to the aluminum tube.
- the push rod is carried out as already described above.
- the push rod has several, in the longitudinal direction the push rod extending carbon fiber fins on.
- the carbon fiber slats are designed as shown above.
- the push rod on a winding of carbon fibers in the circumferential direction is carried out as already described above.
- the present invention further includes a crane having a fall-back support and / or a push rod and / or grid construction as set forth above.
- the fallback support in FIG. 1 furthermore two hydraulic cylinders 6 coupled via gas springs, which are arranged between the boom head 3 and the guy support 5.
- the entire retreating moment of the guy blocks 5 is thus compensated via the gas springs 6.
- the retreating moment of the jib is absorbed by the pressure rods according to the invention, which form rigid pressure rods.
- FIG. 5 the direction of the compressive force F is shown by the arrows, which acts on the push rod according to the invention.
- the push rod according to the invention is designed in the exemplary embodiment so that it withstands a pressure load of more than 500 kN.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Description
Die vorliegende Erfindung betrifft eine Rückfallstütze für einen Nadelausleger, welcher an einem Auslegerkopf eines Kranes angebracht ist, mit mindestens einer Druckstange, welche zwischen dem Nadelausleger und dem Auslegerkopf angeordnet ist und eine Rückfallbewegung des Nadelauslegers begrenzt.The present invention relates to a fall arrestor for a jib attached to a jib head of a crane with at least one push rod disposed between the jib and the jib head and limiting a relieving movement of the jib.
Für die Rückhaltefunktion von beweglichen oder festen Nadelauslegern sind verschiedene Lösungen bekannt. Zum einen kommen dabei Zugseile mit einer Druckstütze zum Einsatz, welche auf der Vorderseite des Nadelauslegers angeordnet sind und die Rückfallbewegung des Nadelausleger so z. B. beim Reißen des Lastseils begrenzen. Eine solche Anordnung aus Zugseil mit Druckstütze wird auch umgangssprachlich als Affenschaukel bezeichnet. Diese Lösung hat jedoch den Nachteil, dass der Kran mit einem gewissen Abstand zu angrenzenden Gebäudekanten positioniert werden muss, da die Affenschaukel nach vorne hin Platz benötigt.Various solutions are known for the retention function of movable or fixed jibs. On the one hand come with traction ropes with a pressure support used, which are arranged on the front of the jaw and the return movement of the jaw so z. B. limit when tearing the load rope. Such an arrangement of traction cable with pressure support is also colloquially referred to as monkey swing. However, this solution has the disadvantage that the crane must be positioned at a certain distance from adjacent edges of the building, since the monkey swing needs space in the front.
Weiterhin sind Rückfallstützen mit mindestens einer Druckstange bekannt, welche zwischen dem Nadelausleger und dem Auslegerkopf angeordnet ist und eine Rückfallbewegung des Nadelauslegers so nach hinten begrenzt. Für solche Rückfallstützen werden dabei Druckstangen aus einem Stahlrohr hergestellt, was zu einem hohen Gewicht der Konstruktion und einer dementsprechend verringerten Traglast des Kranes führt. Zudem kann aufgrund der Masse auch nur ein relativ kürzerer Ausleger aufgerichtet werden.
Aus der
Aufgabe der vorliegenden Erfindung ist es daher, eine Rückfallstütze zur Verfügung zu stellen, durch welche sich höhere Traglasten erreichen lassen, insbesondere durch Verringerung des Gewichts der Druckstange.Object of the present invention is therefore to provide a fallback support available, through which higher payloads can be achieved, in particular by reducing the weight of the push rod.
Diese Aufgabe wird erfindungsgemäß durch eine Rückfallstütze gemäß Anspruch 1 gelöst. Dabei handelt es sich um eine Rückfallstütze für einen Nadelausleger, welcher an einem Auslegerkopf eines Kranes angebracht ist, mit mindestens einer Druckstange, welche zwischen dem Nadelausleger und dem Auslegerkopf angeordnet ist und eine Rückfallbewegung des Nadelauslegers begrenzt. Erfindungsgemäß umfaßt die Druckstange dabei ein Faserverbundrohr. Der Einsatz eines solchen Faserverbundrohrs als Druckstange ermöglicht eine erhebliche Gewichtsreduktion bei gleicher Druckfestigkeit der Rückfallstütze. Hierdurch kann die Traglast des Auslegers entsprechend erhöht werden bzw. kann ein entsprechend größerer und längerer Ausleger eingesetzt werden.This object is achieved by a fallback support according to
Vorteilhafterweise umfaßt die Druckstange dabei ein Aluminiumrohr mit einer Verstärkung aus Kohlefasern. Der Einsatz eines solchen Aluminium-Kohlefaser-Composites als Druckstange führt zum einen zu einer hochfesten und dennoch leichten Druckstange. Zudem erlaubt die Verwendung eines Aluminiumrohrs eine leichte Anbindung der Druckstange an die übrige Konstruktion, z. B. über Endstücke, welche mit dem Aluminiumrohr problemlos verbindbar sind. Die bei faserverstärkten Kunststoffrohren oftmals problematische Anbindung an die weitere Konstruktion ist daher erheblich vereinfacht.Advantageously, the push rod comprises an aluminum tube with a reinforcement made of carbon fibers. The use of such an aluminum-carbon fiber composite as a push rod leads on the one hand to a high-strength yet lightweight push rod. In addition, the use of an aluminum tube allows easy connection of the push rod to the rest of the construction, eg. B. over tails, which are easily connected to the aluminum tube. The case of fiber reinforced Plastic pipes often problematic connection to the further construction is therefore considerably simplified.
Vorteilhafterweise weist die Druckstange mehrere, in Längsrichtung der Druckstange verlaufende Kohlefaser-Lamellen auf. Durch die Kohlefaser-Lamellen kann das Aluminiumrohr gegen Ausknicken verstärkt werden, so dass sich die Druckfestigkeit erheblich erhöht. Die Faserrichtung der Kohlefasern in den Kohlefaser-Lamellen verläuft vorteilhafterweise ebenfalls in Längsrichtung der Druckstange.Advantageously, the push rod has a plurality of extending in the longitudinal direction of the push rod carbon fiber slats. Through the carbon fiber slats that can Aluminum tube are reinforced against buckling, so that the compressive strength increases significantly. The fiber direction of the carbon fibers in the carbon fiber slats advantageously also extends in the longitudinal direction of the push rod.
Vorteilhafterweise ist vorgesehen, dass die Kohlefaser-Lamellen das Aluminiumrohr in Umfangsrichtung mit dazwischen liegenden Abständen umgeben. Hierdurch kann wiederum Gewicht eingespart werden, da keine durchgehende, in Längsrichtung des Aluminiumrohrs verlaufende Kohlefaserverstärkung eingesetzt wird, sondern die Kohlefaser-Lamellen jeweils einen gewissen Abstand zwischen einander aufweisen.Advantageously, it is provided that the carbon fiber blades surround the aluminum tube in the circumferential direction with intervals between them. In this way, in turn, weight can be saved because no continuous, running in the longitudinal direction of the aluminum tube carbon fiber reinforcement is used, but the carbon fiber slats each have a certain distance between each other.
Vorteilhafterweise werden dabei mehrere identische Kohlefaser-Lamellen eingesetzt, welche jeweils mit gleichem Abstand zueinander das Aluminiumrohr in Umfangsrichtung umgeben.Advantageously, several identical carbon fiber fins are used, which each surround the aluminum tube in the circumferential direction at the same distance from each other.
Der Einsatz von Kohlefaser-Lamellen erleichtert auch die Herstellung der erfindungsgemäßen Druckstange, da diese separat hergestellt und dann mit der Aluminiumstange verbunden werden können.The use of carbon fiber slats also facilitates the production of the push rod according to the invention, since these can be manufactured separately and then connected to the aluminum rod.
Vorteilhafterweise sind die Kohlefaser-Lamellen in einem mittleren Bereich der Druckstange angeordnet und erstrecken sich nicht in die Endbereiche der Druckstange. Auch hierdurch kann wiederum Gewicht eingespart werden, während der besonders knickanfällige mittlere Bereich der Druckstange durch die Kohlefaser-Lamellen verstärkt wird. Vorteilhafterweise beträgt die Länge des mittleren Bereichs mit den Kohlefaser-Lamellen dabei zwischen 10% und 90% der Gesamtlänge der Druckstange, weiterhin vorteilhafterweise zwischen 20% und 80%, weiterhin vorteilhafterweise zwischen 25% und 70% und weiterhin vorteilhafterweise zwischen 30% und 50% der Gesamtlänge.Advantageously, the carbon fiber fins are arranged in a central region of the push rod and do not extend into the end regions of the push rod. This, in turn, weight can be saved, while the particularly kink-prone middle region of the push rod is reinforced by the carbon fiber fins. Advantageously, the length of the central region with the carbon fiber lamellae is between 10% and 90% of the total length of the push rod, moreover advantageously between 20% and 80%, furthermore advantageously between 25% and 70% and furthermore advantageously between 30% and 50%. the total length.
Weiterhin vorteilhafterweise weisen die Kohlefaser-Lamellen in radialer Richtung eine Dicke auf, welche zwischen 50% und 300% der Wandstärke des Aluminiumrohrs betragen, vorteilhafterweise zwischen 80% und 250%, weiterhin vorteilhafterweise zwischen 100% und 200%.Further advantageously, the carbon fiber fins have a thickness in the radial direction, which is between 50% and 300% of the wall thickness of the aluminum tube be advantageously between 80% and 250%, more advantageously between 100% and 200%.
Weiterhin vorteilhafterweise sind mehr als drei Kohlefaser-Lamellen vorgesehen, weiterhin vorteilhafterweise mehr als fünf Kohlefaser-Lamellen. Weiterhin vorteilhafterweise beträgt die Anzahl der Kohlefaser-Lamellen zwischen drei und zwanzig, weiterhin vorteilhafterweise zwischen fünf und zwölf.Further advantageously, more than three carbon fiber fins are provided, further advantageously more than five carbon fiber fins. Further advantageously, the number of carbon fiber fins is between three and twenty, more advantageously between five and twelve.
Weiterhin vorteilhafterweise kann die Druckstange zumindest in einem Teilbereich eine Umwicklung aus Kohlefasern in Umfangsrichtung aufweisen. Eine solche Umwicklung aus Kohlefasern erlaubt eine besonders effektive Dämpfung der Druckstange.Further advantageously, the push rod may have a wrapping of carbon fibers in the circumferential direction at least in a partial region. Such a winding of carbon fibers allows a particularly effective damping of the push rod.
Vorteilhafterweise erstreckt sich die Umwicklung aus Kohlefasern dabei über den Bereich der Kohlefaser-Lamellen hinaus. Vorteilhafterweise erstreckt sich die Umwicklung aus Kohlefasern dabei über mehr als 50% der Gesamtlänge des Aluminiumsrohrs, weiterhin vorteilhafterweise über mehr als 70%, weiterhin vorteilhafterweise über mehr als 85%.Advantageously, the wrapping of carbon fibers extends beyond the area of the carbon fiber slats. Advantageously, the winding of carbon fibers extends over more than 50% of the total length of the aluminum tube, moreover advantageously more than 70%, moreover advantageously more than 85%.
Vorteilhafterweise beträgt die Dicke der Umwicklung aus Kohlefasern in radialer Richtung weniger als 70% der Wandstärke des Aluminiumrohrs und/oder der Dicke der Kohlefaser-Lamellen, weiterhin vorteilhafterweise weniger als 50%, weiterhin vorteilhafterweise weniger als 30%. Vorteilhafterweise beträgt die Dicke der Umwicklung dabei mehr als 5% der Wandstärke des Aluminiumrohres, weiterhin vorteilhafterweise mehr als 10%.Advantageously, the thickness of the coiling of carbon fibers in the radial direction is less than 70% of the wall thickness of the aluminum tube and / or the thickness of the carbon fiber fins, more advantageously less than 50%, more advantageously less than 30%. Advantageously, the thickness of the wrapping is more than 5% of the wall thickness of the aluminum tube, moreover advantageously more than 10%.
Vorteilhafterweise ist in den Endbereichen des Aluminiumrohrs keine KohlefaserUmwicklung vorgesehen.Advantageously, no carbon fiber wrap is provided in the end regions of the aluminum tube.
Weiterhin vorteilhafterweise ist vorgesehen, dass die Kohlefaser-Lamellen auf der Umwicklung aus Kohlefasern angeordnet sind. Die Druckstange weist damit von Innen nach Außen folgenden Aufbau aus: ein Aluminiumrohr, eine von der Umwicklung aus Kohlefasern in Umfangsrichtung gebildeten Schicht und die auf dieser Umwicklung angeordneten Kohlefaser-Lamellen.Further advantageously, it is provided that the carbon fiber fins are arranged on the winding of carbon fibers. The push rod thus has the following structure from inside to outside: an aluminum tube, one of the wrapping Carbon fiber layer formed in the circumferential direction and arranged on this wrapping carbon fiber fins.
Die erfindungsgemäße Verwendung eines Aluminium-Kohlefaser-Composite-Rohres erlaubt eine besonders einfache Anbindung der Druckstange über Endstücke, welche mit dem Aluminiumrohr verbunden sind.The inventive use of an aluminum-carbon fiber composite tube allows a particularly simple connection of the push rod via end pieces, which are connected to the aluminum tube.
Vorteilhafterweise weist die Rückfallstütze dabei mindestens ein erstes Endstück auf, welches ein Verbolzen der Rückfallstütze erlaubt. Insbesondere weist dieses Endstück hierfür mindestens eine Lasche mit einer Bohrung auf, durch welche ein Bolzen hindurchgeführt werden kann. Weiterhin vorteilhafterweise weist die Rückfallstütze ein zweites Endstück auf, welches im Belastungsfall formschlüssig in eine Endaufnahme am Nadelausleger oder am Auslegerkopf eingreift.Advantageously, the fallback support has at least one first end piece, which allows a bolting of the fallback support. In particular, this end piece for this purpose at least one tab with a bore through which a bolt can be passed. Further advantageously, the fallback support on a second end piece, which engages positively in the load case in a final recording on the jib or on the boom head.
Durch diese Endstücke kann die Druckstange z. B. für den Fall, dass das Lastseil reißt, die Rückfallbewegung des Nadelauslegers effektiv begrenzen bzw. verhindern.Through these end pieces, the push rod z. B. in the event that the load rope breaks, effectively limit or prevent the relapse movement of the jaw.
Weiterhin vorteilhafterweise weist die erfindungsgemäße Druckstange eine Druckfestigkeit von mehr als 500 kN auf.Further advantageously, the push rod according to the invention has a compressive strength of more than 500 kN.
Die erfindungsgemäße Druckstange kann nicht nur als Rückfallstütze für den Nadelausleger eines Kranes eingesetzt werden, sondern ist überall dort einsetzbar, wo eine hohe Festigkeit bei geringem Gewicht benötigt wird.The push rod according to the invention can be used not only as a fallback support for the jib of a crane, but is everywhere used where a high strength is required at low weight.
Die vorliegende Erfindung umfaßt daher weiterhin eine Druckstange aus einem Aluminiumrohr mit einer Verstärkung aus Kohlefasern. Ein solches Aluminiumrohr mit einer Verstärkung aus Kohlefasern kann überall dort eingesetzt werden, wo hohe Kräfte bei geringem Gewicht aufzunehmen sind.The present invention therefore further comprises a push rod made of an aluminum tube with a carbon fiber reinforcement. Such an aluminum tube with a reinforcement of carbon fibers can be used wherever high forces are to be absorbed at low weight.
Vorteilhafterweise ist die Druckstange dabei so ausgeführt, wie dies oben bereits dargestellt wurde. Insbesondere weist die Druckstange dabei mehrere, in Längsrichtung der Druckstange verlaufende Kohlefaser-Lamellen auf. Vorteilhafterweise sind die Kohlefaser-Lamellen dabei so ausgeführt, wie es oben dargestellt wurde.Advantageously, the push rod is carried out as already described above. In particular, the push rod has several, in the longitudinal direction the push rod extending carbon fiber fins on. Advantageously, the carbon fiber slats are designed as shown above.
Weiterhin vorteilhafterweise weist die Druckstange eine Umwicklung aus Kohlefasern in Umfangsrichtung auf. Vorteilhafterweise ist diese Umwicklung dabei so ausgeführt, wie dies bereits oben dargestellt wurde.Further advantageously, the push rod on a winding of carbon fibers in the circumferential direction. Advantageously, this wrapping is carried out as already described above.
Weiterhin vorteilhafterweise weist die Rückfallstütze zwei Endstücke auf, welche mit den Enden des Aluminiumrohrs verbunden sind. Vorteilhafterweise dienen die se Endstücke der Anbindung an die weitere Konstruktion.Further advantageously, the fallback support has two end pieces, which are connected to the ends of the aluminum tube. Advantageously, the se end pieces serve the connection to the further construction.
Die vorliegende Erfindung umfaßt weiterhin eine Gitterkonstruktion, insbesondere einen Ausleger, mit einer Rückfallstütze und/oder einer Druckstange, wie sie oben dargestellt wurde. Insbesondere umfaßt die vorliegende Erfindung dabei einen Ausleger eines Kranes, an welchem ein Nadelausleger angeordnet ist, wobei erfindungsgemäß zwischen dem Nadelausleger und dem Auslegerkopf eine erfindungsgemäße Rückfallstütze angeordnet ist. Die vorliegende Erfindung umfaßt aber auch ganz allgemein Gitterkonstruktionen, bei welchen eine oder mehrere erfindungsgemäße Druckstangen eingesetzt werden.The present invention further comprises a grid construction, in particular a cantilever, with a fallback support and / or a pushrod as set forth above. In particular, the present invention comprises a boom of a crane, on which a needle boom is arranged, wherein according to the invention between the needle boom and the boom head a fallback support according to the invention is arranged. However, the present invention also quite generally includes grid structures in which one or more push rods according to the invention are used.
Die vorliegende Erfindung umfaßt weiterhin einen Kran mit einer Rückfallstütze und/oder einer Druckstange und/oder Gitterkonstruktion, wie sie oben dargestellt wurde.The present invention further includes a crane having a fall-back support and / or a push rod and / or grid construction as set forth above.
Die vorliegende Erfindung wird nun anhand eines Ausführungsbeispiels sowie Zeichnungen näher dargestellt. Dabei zeigen:
- Figur 1:
- ein Ausführungsbeispiel einer erfindungsgemäßen Rückfallstütze in einer Seitenansicht,
- Figur 2:
- ein Ausführungsbeispiel einer erfindungsgemäßen Druckstange, wie es im Ausführungsbeispiel einer erfindungsgemäßen Rückfallstütze zum Einsatz kommt,
- Figur 3:
- die Anlenkung der erfindungsgemäßen Druckstange an Anlenkpunkten eines Kranes, wie diese bei der erfindungsgemäßen Rückfallstütze erfolgt,
- Figur 4:
- eine perspektivische Darstellung eines Ausführungsbeispiels einer erfindungsgemäßen Druckstange und
- Figur 5:
- mehrere Ansichten des bereits in
dargestellten Ausführungsbeispiels einer Druckstange.Figur 4
- FIG. 1:
- An embodiment of a fallback support according to the invention in a side view,
- FIG. 2:
- An embodiment of a push rod according to the invention, as used in the embodiment of a fallback support according to the invention,
- FIG. 3:
- the articulation of the push rod according to the invention at articulation points of a crane, as is done in the fallback support according to the invention,
- FIG. 4:
- a perspective view of an embodiment of a push rod according to the invention and
- FIG. 5:
- several views of the already in
FIG. 4 illustrated embodiment of a push rod.
Eine Rückfallstütze gemäß der vorliegenden Erfindung ist in
Der Nadelausleger 1 ist um eine horizontale Achse 4 schwenkbar am Auslegerkopf 3 angeordnet. Bei einem Lastabriß oder heftigen Windstößen kann der Nadelausleger von vorne nach hinten gedrückt werden, wodurch zum Teil sehr hohe Kräfte entstehen können. Diese Kräfte müssen von der Rückfallstütze aufgenommen werden.The
Die in
Zusätzlich zu den beiden erfindungsgemäßen Druckstangen 10 weist die Rückfallstütze in
Die erfindungsgemäß in der Rückfallstütze zum Einsatz kommenden Druckstangen 10 sind in
Das erfindungsgemäße Faserverbundrohr ist nun in
Die erfindungsgemäße Druckstange umfaßt dabei ein Aluminiumrohr 21, welches eine Verstärkung aus Kohlefasern aufweist. Dabei sind Kohlefaser-Lamellen 23 vorgesehen, welche in Längsrichtung des Aluminiumrohres verlaufen. Die Kohlefaser-Lamellen sind dabei außen am Aluminiumrohr angeordnet und umgeben dieses in Umfangsrichtung, wobei zwischen den einzelnen Kohlefaser-Lamellen ein gewisser Abstand verbleibt. Dabei werden jeweils gleichartige Kohlefaser-Lamellen 23 eingesetzt, welche in regelmäßigen Abständen um das Aluminiumrohr herum angeordnet sind. Im Ausführungsbeispiel werden acht Kohlefaser-Lamellen eingesetzt.The push rod according to the invention comprises an
Wie aus
Das erfindungsgemäße Composite-Rohr weist weiterhin eine Umwicklung 22 aus Kohlefasern auf. Die Kohlefasern sind dabei in Umfangsrichtung um die Druckstange gewickelt und bilden so eine effektive Dämpfung. Die Umwicklung erstreckt sich dabei über einen Großteil der Gesamtlänge des Aluminiumrohrs 21. Lediglich an den beiden Enden des Aluminiumrohrs ist ein kurzes Stück nicht durch die Umwicklung aus Kohlefasern umgeben. Die Länge der nicht umwickelten Endbereiche beträgt dabei im Ausführungsbeispiel jeweils weniger als 5% der Gesamtlänge des Aluminiumrohrs.The composite pipe according to the invention further comprises a winding 22 made of carbon fibers. The carbon fibers are wound in the circumferential direction around the push rod and thus form an effective damping. The wrapping extends over a large part of the total length of the
Die Kohlefaser-Lamellen 23 sind dabei auf der Umwicklung 22 aus Kohlefasern aufgebracht. Die Faserrichtung in den Kohlefaser-Lamellen verläuft parallel zur Längsrichtung des Aluminiumrohrs, so dass die Knickfestigkeit des Aluminiumrohrs durch die Kohlefaser-Lamellen erheblich verstärkt wird. Das Aluminiumrohr ermöglicht dagegen eine besonders einfache Verbindung mit Endstücken, über welche das Aluminium-Kohlefaser-Composite-Rohr mit der weiteren Struktur verbunden werden kann.The
In
Im Ausführungsbeispiel weist das eingesetzte Aluminiumrohr einen Innendurchmesser von 100 mm und einen Außendurchmesser von 110 mm auf. Das Aluminiumrohr hat damit eine Wandstärke von 5 mm. Der Außendurchmesser des Composite-Rohrs im Bereich der Umwicklung aus Kohlefasern beträgt dabei 112 mm. Die Kohlefaserumwicklung weist damit eine Dicke von 1 mm auf. Im Bereich der Kohlefaser-Lamellen weist das Rohr dagegen einen Außendurchmesser von 124 mm auf. Die Kohlefaser-Lamellen weisen demnach eine Dicke von 6 mm auf. Das gesamte Aluminium-Kohlefaser-Verbundrohr weist eine Gesamtlänge von ca. 2 m auf.In the exemplary embodiment, the aluminum tube used has an inner diameter of 100 mm and an outer diameter of 110 mm. The aluminum tube thus has a wall thickness of 5 mm. The outer diameter of the composite tube in the area of the winding of carbon fibers is 112 mm. The carbon fiber wrap thus has a thickness of 1 mm. In the field of carbon fiber fins, however, the tube has an outer diameter of 124 mm. The carbon fiber blades therefore have a thickness of 6 mm. The entire aluminum-carbon fiber composite pipe has a total length of about 2 m.
Dabei ist für den Fachmann offensichtlich, dass es sich bei den oben angegebenen Maßangaben lediglich um eine spezielle Ausführungsform der vorliegenden Erfindung handelt, welche jedoch eine besonders hohe Druckfestigkeit ermöglicht. Für andere Anwendungen können die entsprechenden Größen für das Aluminiumrohr, die Umwicklung und die Kohlefaser-Lamellen jedoch entsprechend angepasst werden.It is obvious to the person skilled in the art that the dimensions given above are only a special embodiment of the present invention, which, however, enables a particularly high compressive strength. For other applications, however, the corresponding sizes for the aluminum tube, the wrapping and the carbon fiber slats can be adjusted accordingly.
Die vorliegende Erfindung stellt mit dem Aluminium-Kohlefaser-Verbundrohr eine besonders feste und dennoch leichte Druckstange zur Verfügung. Diese kann dabei insbesondere in einer erfindungsgemäßen Rückfallstütze eingesetzt werden.The present invention provides the aluminum-carbon fiber composite pipe a particularly strong yet lightweight push rod available. This can be used in particular in a fallback support according to the invention.
Die vorliegende Erfindung umfaßt neben der Druckstange und der Rückfallstütze weiterhin Gitterkonstruktionen wie z. B. einen Ausleger, in welchem diese zum Einsatz kommen, sowie einen entsprechenden Kran.The present invention, in addition to the push rod and the fallback support further grid structures such. B. a boom in which they are used, and a corresponding crane.
Claims (10)
- A fall-back support for a luffing boom which is attached to a boom head of a crane, having at least one pressure rod which is arranged between the luffing boom and the boom head and which bounds a fall-back movement of the luffing boom,
characterized in that
the at least one pressure rod includes a fiber composite tube, in particular an aluminum tube having a reinforcement of carbon fibers. - A fall-back support in accordance with claim 1, wherein the pressure rod includes a plurality of carbon fiber lamellae extending in the longitudinal direction of the pressure rod.
- A fall-back support in accordance with claim 2, wherein the carbon fiber lamellae surround the aluminum tube in the peripheral direction with intervals disposed therebetween.
- A fall-back support in accordance with either of the claims 2 or 3, wherein the carbon fiber lamellae are arranged in a middle region of the pressure rod and do not extend in the end regions of the pressure rod.
- A fall-back support in accordance with one of the preceding claims, wherein the pressure rod has a winding of carbon fibers in the peripheral direction in at least a part region.
- A fall-back support in accordance with claim 5, wherein the winding of carbon fibers extends beyond the region of the carbon fiber lamellae; and/or wherein the carbon fiber lamellae are arranged on the winding of carbon fibers.
- A fall-back support in accordance with one of the preceding claims, having at least one first end piece which allows a bolting of the fall-back support, and/or having a second end piece which engages in shape-matched manner in the case of strain into an end receiver at the luffing boom or at the boom head.
- A pressure rod of aluminum tube having a reinforcement of carbon fibers in accordance with one of claims 2 to 6 as part of a fall-back support in accordance with one of the preceding claims.
- A lattice construction, in particular a boom, having a fall-back support and/or a pressure rod in accordance with one of the preceding claims.
- A crane comprising a fall-back support in accordance with one of the claims 1 to 7 and/or a pressure rod in accordance with claim 8 and/or a lattice construction in accordance with claim 9.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010013328A DE102010013328A1 (en) | 2010-03-30 | 2010-03-30 | Fall-back support |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2371756A2 EP2371756A2 (en) | 2011-10-05 |
EP2371756A3 EP2371756A3 (en) | 2011-12-21 |
EP2371756B1 true EP2371756B1 (en) | 2013-05-08 |
Family
ID=44202139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11002368.6A Active EP2371756B1 (en) | 2010-03-30 | 2011-03-22 | Retention support |
Country Status (3)
Country | Link |
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US (1) | US20110240582A1 (en) |
EP (1) | EP2371756B1 (en) |
DE (1) | DE102010013328A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102745604B (en) * | 2012-06-21 | 2014-09-10 | 三一重工股份有限公司 | Crawler crane |
DE202016005619U1 (en) * | 2016-09-12 | 2016-12-19 | Liebherr-Werk Ehingen Gmbh | crane |
DE202017104032U1 (en) * | 2017-05-31 | 2018-09-18 | Liebherr-Werk Biberach Gmbh | Structure for a crane and similar machines, as well as a crane with such a structure |
JP7276300B2 (en) * | 2020-10-22 | 2023-05-18 | コベルコ建機株式会社 | Jib backstop device and transportation method for jib backstop device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2634081A1 (en) * | 1976-07-29 | 1978-02-02 | Klaus Lechleitner | Crane jib of composite material - comprising box sections, opt. reinforced with glass or carbon fibre and plastics or aromatic polyamide |
US4473214A (en) * | 1980-12-24 | 1984-09-25 | Kidde, Inc. | Luffing jib for construction crane |
US4782962A (en) * | 1982-02-16 | 1988-11-08 | Hackworth Harry L | Back packable portable unit |
DE4408444C1 (en) * | 1994-03-12 | 1995-04-06 | Dornier Gmbh | Pipe or hollow profile with special strength properties along with a low weight, and process for the production thereof |
DE19829829A1 (en) * | 1998-07-03 | 2000-01-13 | Grove Us Llc Shady Grove | Composite telescopic part and boom |
US6267200B1 (en) * | 1998-11-02 | 2001-07-31 | Grove U.S. Llc | Lift apparatus with floating lift cylinder attachment |
JP4553454B2 (en) * | 2000-07-28 | 2010-09-29 | 株式会社アイチコーポレーション | Boom structure of an aerial work vehicle |
US6719009B1 (en) * | 2001-02-23 | 2004-04-13 | Schwing America, Inc. | Composite material piping system |
ITUD20070056A1 (en) * | 2007-03-16 | 2008-09-17 | Cifa Spa | CONCRETE DISTRIBUTION ARM FOR WORKING VEHICLES AND ITS MANUFACTURING PROCEDURE |
US8505184B2 (en) * | 2009-03-13 | 2013-08-13 | Cifa Spa | Method to make an arm for the distribution of concrete, and arm thus made |
US8910807B2 (en) * | 2009-05-20 | 2014-12-16 | Manitowoc Crane Companies, Llc | Compressible stop member for use on a crane |
-
2010
- 2010-03-30 DE DE102010013328A patent/DE102010013328A1/en not_active Ceased
-
2011
- 2011-03-22 EP EP11002368.6A patent/EP2371756B1/en active Active
- 2011-03-30 US US13/075,941 patent/US20110240582A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20110240582A1 (en) | 2011-10-06 |
DE102010013328A1 (en) | 2011-10-06 |
EP2371756A2 (en) | 2011-10-05 |
EP2371756A3 (en) | 2011-12-21 |
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