EP2568084B1 - Telescopic crane arm - Google Patents
Telescopic crane arm Download PDFInfo
- Publication number
- EP2568084B1 EP2568084B1 EP11007266.7A EP11007266A EP2568084B1 EP 2568084 B1 EP2568084 B1 EP 2568084B1 EP 11007266 A EP11007266 A EP 11007266A EP 2568084 B1 EP2568084 B1 EP 2568084B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- crane arm
- hydraulic line
- boom
- crane
- 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.)
- Not-in-force
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
- E02F3/306—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom with telescopic dipper-arm or boom
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
- B66C13/14—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices to load-engaging elements or motors associated therewith
-
- 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
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2271—Actuators and supports therefor and protection therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2275—Hoses and supports therefor and protection therefor
Definitions
- the invention relates to a telescopic crane arm for a crane, in particular a mobile crane, with at least one boom and at least one telescopic movable relative to the boom Schububsverinrung and at least one arranged in the crane arm hydraulic line for attachable to the crane arm and hydraulically actuated implement, wherein the hydraulic line at least a first pipe and a second tube slidable with respect to the first tube, wherein a connection from the first tube and / or the second tube to at least one oil compensation space arranged in the interior of the crane arm is provided to compensate for effects of change in length of the crane arm.
- the invention relates to a crane with at least one telescopic crane arm of the type specified.
- Such telescopic crane crane jibs are already known in a variety of the prior art.
- the hydraulic line which is normally designed as an oil hose. Due to the telescoping of the crane arm and the resulting change in length of the crane arm, it is also necessary that the hydraulic hose "grows" with the change in length of the crane arm. This is usually accomplished so that the hydraulic hose loops when the telescoping crane arm is retracted and these loops decrease or disengage during extension of the pusher extension when the pusher extension is extended.
- the disadvantage here is that the loops of the hydraulic line thereby hang down from the crane arm and it is thus possible that This hydraulic line is damaged - be it while maneuvering the crane arm or when extending or retracting the Schub consortiumverbierung.
- the object of the invention is to provide a comparison with the prior art improved telescoping crane arm for a crane.
- the oil compensation chamber is designed to be variable in its volume, whereby a total spatial content of the first tube, the second tube and the oil compensation chamber in each Displacement position of the first tube relative to the second tube is the same size.
- the oil compensation chamber is designed to be variable in shape, whereby the oil compensation chamber changes its longitudinal extension in each displacement position of the first tube relative to the second tube.
- the oil compensation chamber with an extending crane arm increases its length or shortens its length with an entering crane arm.
- the oil compensation chamber is formed in or on the hydraulic line. This measure can contribute to achieving a compact design.
- the crane arm has at least one thrust cylinder for moving the Schubs Suiteveraterung relative to the boom.
- the hydraulic line is fastened on the one hand to the boom and on the other hand is fastened to the push piece extension.
- the thrust piece cylinder is formed in the interior of the thrust piece extension.
- the thrust piece extension is formed in the interior of the thrust piece extension.
- first hydraulic line is attached to the second hydraulic line, whereby the first hydraulic line moves together with the second hydraulic line when the push piece extension extends or retracts.
- the first hydraulic line is designed as an oil supply line for a working device that can be fastened to the crane arm
- the second hydraulic line is designed as an oil discharge line for the working device that can be fastened to the crane arm.
- protection is desired for a crane with at least one telescopic crane arm according to at least one of the described embodiments.
- FIG. 1 shows a crane 100, which is formed in this preferred embodiment as a vehicle crane.
- the crane 100 in this case has a crane column 102, and a plurality of arms 103, 104 and 21.
- the laying 104 and 21 are pivotable via a plurality of lifting cylinders via joints.
- the implement 101 - in this embodiment a rotator - attached.
- a tool to attach - which can be hydraulically operated among other things - such as the head of a Holz meetnters.
- This tool would in this preferred embodiment via hydraulic lines 10 and 50 (not shown, see FIG. 2 ) operated.
- These hydraulic lines 10 and 50 are in the interior of the crane arm 20 - ie in the interior of the boom 21 and the Schub Federationveraterung 22 - formed.
- FIG. 2 shows a section through the telescopic crane arm 20. In the interior 24 of the pusher extension 22 while the pusher cylinder 23 and the two hydraulic lines 10 and 50 is formed.
- hydraulic line 10 and 50 is not attached to the boom 21 and the thrust piece extension 22, but that the hydraulic line 10 and 50 is fixed to the thrust cylinder 23 and extends together with this or retracts.
- the hydraulic line 10 is formed as an oil supply line 105 for the attached to the crane arm 20 implement 101 and the second hydraulic line 50 as ⁇ labtechnisch Gustav 106 for the crane arm 20th attached working device 101 formed. It is of course also conceivable that these hydraulic lines 10 and 50 can also be used for other purposes or it is also conceivable to form further hydraulic lines in the interior 24 of the thrust piece extension 22.
- FIG. 2 is the embodiment of a hydraulic line 10 and 50 of FIGS. 3a and 3b shown, also it is of course possible, the embodiments of FIGS. 4a and 4b as well as the FIGS. 5a and 5b in this crane arm 20 or this Schub Federationveraterung 22 form.
- FIG. 3a shows a section through the hydraulic lines 10 and 50 in the retracted state and FIG. 3b shows a section through the hydraulic line 10 and 50 in the extended state.
- the hydraulic line 10 or 50 has a first tube 1 and a second tube 2 which is displaceable relative to the first tube 1, wherein a connection 3 from the first tube 1 and / or the second tube 2 to at least one oil compensation chamber 4 which varies in its volume 33 is formed, whereby a total spatial content 30 of the second tube 2, the first tube 1 and the oil compensation chamber 4 in each extension position of the second tube 2 relative to the first tube 1 is the same size.
- the entire spatial content 30 is formed by the second pipe space content 32, the first pipe space content 31 and the volume 33 of the oil equalization space 4. Strictly speaking, the volume of the compound 3 is also added to the entire spatial content 30, since this volume of compound 3 but not changed, this can be disregarded.
- the volume 33 of the variable oil compensation chamber 4 is the largest and the second tube space content 32 of the second tube 2 smallest. If the second tube 2 now moves relative to the first tube 1, the second tube space content 32 increases and the volume 33 of the oil compensation chamber 4 is made possible, in that oil flows from the oil equalization chamber 4 via the connection 3 into the second tube 2. It can thereby be achieved that the oil pressure within the hydraulic line 10 or 50 in each extension position of the second tube 2 relative to the first tube 1 is constant.
- the second tube 2 is moved together with the thrust piece extension 22 and the first tube 1 is fixedly secured to the boom 21.
- first tube 1 could be moved together with the thrust piece extension 22 and that the second tube 2 could be fixedly secured to the boom 21.
- the compensation chamber 4 is formed outside the first tube 1 and outside the second tube 2. It is also conceivable, of course, that the oil compensation chamber 4 is formed between the two pipes 1 and 2. Furthermore, it would also be conceivable that the oil compensation chamber 4 is formed in the first tube 1 or in the second tube 2. In this preferred embodiment, further, the first tube 1 is formed as an inner tube and the second tube 2 as an outer tube.
- FIG. 4a shows a further embodiment of a hydraulic line 10 and 50 in the retracted state.
- the oil compensation chamber 4 is still formed in the interior 24 of the pusher extension 22 (not shown, see FIG. 2 However, not directly on the pipes 1 and 2. Nevertheless, the oil compensation chamber 4 is connected via the connection 3 with the pipes 1 and 2. Process the two tubes 1 and 2 relative to each other (as in FIG. 4b shown) so oil passes from the oil compensation chamber 4 via the connection 3 in the interior of the first tube 1 whereby the first tube space content 31 increases.
- the hydraulic line 10 and 50 at least a first tube 1 and a second tube 2 displaceable in the first tube 2, wherein the compound 3 from the first tube 1 to a arranged in the interior 24 of the pusher extension 22 oil compensation chamber 4 to compensate Effects of the change in length of the crane arm (20) is formed.
- FIG. 5a and Figure 5b show a further variant of an embodiment of a hydraulic line 10 and 50.
- both tubes 1 and 2 during the extension of the thrust piece extension 22 are moved.
- connection 3 between the two tubes 1 and 2 is substantially straight from the tube opening 43 of the second tube 2 to the oil compensation chamber 4 and from this via the tube opening 42 of the first tube 1 in the first tube.
- the oil compensation chamber 4 changes its shape.
- the connection 3 still exists via the tube opening 43 of the second tube 2 to the oil compensation chamber 4 and from this via the tube opening 42 of the first tube 1 in the first tube 1, while the oil compensation chamber 4 was stretched by the extension around the two channels 44th
- the volume 32 of the second tube 2 and the volume 31 of the first tube 1 and the volume 33 of the compensation chamber 4 changes neither in total nor individually, it only changes the longitudinal extent of the compensation chamber 4.
- the volume 33 of the compensation chamber 4 is due to the fact that the channels 44 are filled even in the retracted state of the two tubes 1 and 2, also constant.
- the amount of oil in the hydraulic line is constant in each telescoping position, ie there is no oil flow at the inlet or at the inlet Output of the hydraulic line comes when the pusher extension extends or retracts. That is, the pressure is constant at all times in any position in the hydraulic line - without the intervention of a pump or the like.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Description
Die Erfindung betrifft einen teleskopierbaren Kranarm für einen Kran, insbesondere Fahrzeugkran, mit wenigstens einem Ausleger und wenigstens einer relativ zum Ausleger teleskopierbar bewegbaren Schubsstückverlängerung und wenigstens einer im Kranarm angeordneten Hydraulikleitung für ein am Kranarm befestigbares und hydraulisch betätigbares Arbeitsgerät, wobei die Hydraulikleitung wenigstens ein erstes Rohr und ein zu dem ersten Rohr verschiebbares zweites Rohr aufweist, wobei eine Verbindung vom ersten Rohr und/oder dem zweiten Rohr zu wenigstens einem im Inneren des Kranarms angeordneten Ölausgleichsraum zum Ausgleich von Effekten der Längenänderung des Kranarms ausgebildet ist.The invention relates to a telescopic crane arm for a crane, in particular a mobile crane, with at least one boom and at least one telescopic movable relative to the boom Schububsverlängerung and at least one arranged in the crane arm hydraulic line for attachable to the crane arm and hydraulically actuated implement, wherein the hydraulic line at least a first pipe and a second tube slidable with respect to the first tube, wherein a connection from the first tube and / or the second tube to at least one oil compensation space arranged in the interior of the crane arm is provided to compensate for effects of change in length of the crane arm.
Weiters betrifft die Erfindung einen Kran mit wenigstens einem teleskopierbaren Kranarm der angegebenen Art.Furthermore, the invention relates to a crane with at least one telescopic crane arm of the type specified.
Derartige teleskopierbare Kranarme für Kräne sind bereits in einer Vielzahl vom Stande der Technik her bekannt.Such telescopic crane crane jibs are already known in a variety of the prior art.
So zeigt etwa die
Alternativ zur Ausbildung im Kranarm ist oft auch am Kranarm an mehreren Stellen die Hydraulikleitung befestigt, welche normalerweise als Ölschlauch ausgebildet ist. Aufgrund der Teleskopierbarkeit des Kranarmes und der sich daraus ergebenden Längenveränderung des Kranarmes ist es ebenfalls notwendig, dass der Hydraulikschlauch mit der Längenveränderung des Kranarmes "mit wächst". Dies wird normalerweise so gelöst, dass der Hydraulikschlauch Schlaufen bildet, wenn der teleskopierbare Kranarm eingefahren ist und sich diese Schlaufen während des Ausfahrens der Schubstückverlängerung verringern bzw. auflösen, wenn die Schubstückverlängerung ausgefahren ist. Nachteilig dabei ist, dass die Schlaufen der Hydraulikleitung dabei vom Kranarm hinunterhängen und es somit möglich ist, dass diese Hydraulikleitung beschädigt wird - sei es beim Manövrieren des Kranarmes oder auch beim Aus- bzw. Einfahren des Schubstückverlängerung.As an alternative to training in the crane arm is often attached to the crane arm at several points, the hydraulic line, which is normally designed as an oil hose. Due to the telescoping of the crane arm and the resulting change in length of the crane arm, it is also necessary that the hydraulic hose "grows" with the change in length of the crane arm. This is usually accomplished so that the hydraulic hose loops when the telescoping crane arm is retracted and these loops decrease or disengage during extension of the pusher extension when the pusher extension is extended. The disadvantage here is that the loops of the hydraulic line thereby hang down from the crane arm and it is thus possible that This hydraulic line is damaged - be it while maneuvering the crane arm or when extending or retracting the Schubstückverlängerung.
Aufgabe der Erfindung ist es, einen gegenüber dem Stand der Technik verbesserten teleskopierbaren Kranarm für einen Kran anzugeben.The object of the invention is to provide a comparison with the prior art improved telescoping crane arm for a crane.
Diese Aufgabe wird durch einen teleskopierbaren Kranarm mit den Merkmalen des Anspruches 1 gelöst.This object is achieved by a telescopic crane arm with the features of claim 1.
Dadurch, dass das erste Rohr, das zweite Rohr und der Ölausgleichsraum im Inneren der Schubstückverlängerung ausgebildet sind, wird erreicht, dass ein äußerst kompakter Kranarm erzielt werden kann - im Gegensatz zum Stand der Technik (
Durch die Verwendung von Rohren können auch die Nachteile, die die Verwendung von Schläuchen aufweisen, vermieden werden. Zum Betreiben etwa eines Harvesters sind sehr hohe Drücke und Litermengen notwendig, was bei Verwendung von Schläuchen zu äußerst großen Dimensionen führt. Dies wiederum führt zu erhöhten Biegeradien der Schläuche, wodurch ein großer Kranarm benötigt wird um diese Biegeradien zuzulassen. Wird hingegen der Biegeradius unterschritten um einen kleineren Kranarm zu verwenden verkürzt sich die Lebensdauer des Schlauches extrem. Dies führt zu erhöhten Stillstandzeiten des Kranes für den Austausch des Schlauches und auch zu höherem Material- und Kostenaufwand. Bei der Verwendung von Rohren hingegen ist dies nicht der Fall, da diese dazu geeignet sind, großem Druck stand zu halten.The use of pipes also avoids the disadvantages associated with the use of hoses. To operate such as a harvester very high pressures and volumes of liters are necessary, which leads to extremely large dimensions when using hoses. This in turn leads to increased bending radii of the hoses, whereby a large crane arm is required to allow these bending radii. If, however, the bending radius falls short of using a smaller crane arm, the life of the hose is extremely shortened. This leads to increased downtime of the crane for the replacement of the hose and also to higher material and cost. When using pipes, however, this is not the case, since they are suitable to withstand high pressure.
Weitere vorteilhafte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen definiert.Further advantageous embodiments of the invention are defined in the dependent claims.
Als besonders vorteilhaft hat es sich erwiesen, wenn der Ölausgleichsraum in seinem Rauminhalt veränderlich ausgebildet ist, wodurch ein gesamter räumlicher Inhalt des ersten Rohres, des zweiten Rohres und des Ölausgleichsraums in jeder Verschiebeposition des ersten Rohres relativ zum zweiten Rohr gleich groß ist.It has proven to be particularly advantageous if the oil compensation chamber is designed to be variable in its volume, whereby a total spatial content of the first tube, the second tube and the oil compensation chamber in each Displacement position of the first tube relative to the second tube is the same size.
Durch die Ausbildung eines in seinem Rauminhalt veränderlichen Ölausgleichsraumes wird erzielbar, dass der Druck innerhalb der Hydraulikleitung in jeder beliebigen Ausziehposition der Schubstückverlängerung konstant gehalten werden kann, da der gesamte räumliche Inhalt des zweiten Rohres, des ersten Rohres und des Ölausgleichsraumes in Summe immer unverändert bleibt.By forming a variable in its volume oil compensation space is achieved that the pressure within the hydraulic line in any extension position of the Schubstückverlängerung can be kept constant, since the total spatial content of the second tube, the first tube and the oil compensation chamber in total always remains unchanged.
Weiters kann bevorzugt vorgesehen sein, dass der Ölausgleichsraum in seiner Form veränderlich ausgebildet ist, wodurch der Ölausgleichsraums in jeder Verschiebeposition des ersten Rohres relativ zum zweiten Rohr seine Längserstreckung verändert. Somit kann erzielt werden, dass der Ölausgleichsraum mit einem ausfahrenden Kranarm seine Länge vergrößert bzw. mit einem einfahrenden Kranarm seine Länge verkürzt.Furthermore, it can preferably be provided that the oil compensation chamber is designed to be variable in shape, whereby the oil compensation chamber changes its longitudinal extension in each displacement position of the first tube relative to the second tube. Thus, it can be achieved that the oil compensation chamber with an extending crane arm increases its length or shortens its length with an entering crane arm.
Besonders bevorzugt kann vorgesehen sein, dass der Ölausgleichsraums in oder an der Hydraulikleitung ausgebildet ist. Diese Maßnahme kann zur Erzielung einer kompakten Bauweise beitragen.Particularly preferably, it may be provided that the oil compensation chamber is formed in or on the hydraulic line. This measure can contribute to achieving a compact design.
Als besonders vorteilhaft hat es sich herausgestellt, wenn der Kranarm wenigstens einen Schubstückzylinder zum Bewegen der Schubsstückverlängerung relativ zum Ausleger aufweist.To be particularly advantageous, it has been found when the crane arm has at least one thrust cylinder for moving the Schubsstückverlängerung relative to the boom.
Gemäß einem bevorzugten Ausführungsbeispiel kann vorgesehen sein, dass die Hydraulikleitung einerseits am Ausleger befestigt ist und andererseits an der Schubsstückverlängerung befestigt ist. Durch die Ausbildung der Hydraulikleitung mit Befestigungspunkten einerseits am Ausleger und andererseits an der Schubstückverlängerung kann erzielt werden, dass die Längenveränderung des Kranarmes durch den Schubstückzylinder direkt eine Längenveränderung der Hydraulikleitung bewirkt.According to a preferred embodiment it can be provided that the hydraulic line is fastened on the one hand to the boom and on the other hand is fastened to the push piece extension. By the formation of the hydraulic line with attachment points on the one hand on the boom and on the other hand on the Schubstückverlängerung can be achieved that causes the change in length of the crane arm by the pusher cylinder directly a change in length of the hydraulic line.
Weiters kann bevorzugt vorgesehen sein, dass der Schubstückzylinder im Inneren der Schubstückverlängerung ausgebildet ist. Speziell durch die Ausbildung des Schubstückzylinders im Inneren der Schubstückverlängerung kann ein äußerst kompakter Kranarm erzielt werden, bei dem weiters der Vorteil eintreten kann, dass auch der Schubstückzylinder selbst gegen mechanische Einflüsse geschützt ist, da er sich im Inneren des Kranarms befindet.Furthermore, it can preferably be provided that the thrust piece cylinder is formed in the interior of the thrust piece extension. Especially by the formation of the Schubstückzylinders inside the Schubstückverlängerung an extremely compact crane arm can be achieved, in which further may have the advantage that Even the thrust cylinder itself is protected against mechanical influences, since it is located inside the crane arm.
Als besonders vorteilhaft hat es sich herausgestellt, wenn die Hydraulikleitung am Schubstückzylinder befestigt ist. Somit verfährt die Hydraulikleitung zusammen mit dem Schubstückzylinder.To be particularly advantageous, it has been found when the hydraulic line is attached to the thrust cylinder. Thus, the hydraulic line moves together with the thrust piece cylinder.
Als besonders vorteilhaft hat es sich erwiesen, wenn zwei Hydraulikleitungen im Inneren der Schubstückverlängerung ausgebildet sind. Dies kann ebenfalls zu einem kompakten Kranarm beitragen.It has proven particularly advantageous if two hydraulic lines are formed in the interior of the thrust piece extension. This can also contribute to a compact crane arm.
Weiters kann bevorzugt vorgesehen sein, dass die erste Hydraulikleitung an der zweiten Hydraulikleitung befestigt ist, wodurch die erste Hydraulikleitung zusammen mit der zweiten Hydraulikleitung verfährt wenn die Schubstückverlängerung aus- bzw. einfährt.Furthermore, it can preferably be provided that the first hydraulic line is attached to the second hydraulic line, whereby the first hydraulic line moves together with the second hydraulic line when the push piece extension extends or retracts.
Besonders bevorzugt kann vorgesehen sein, dass die erste Hydraulikleitung als Ölzuführleitung für ein am Kranarm befestigbares Arbeitsgerät ausgebildet ist und die zweite Hydraulikleitung als Ölabführleitung für das am Kranarm befestigbare Arbeitsgerät ausgebildet ist. Durch diese Maßnahme kann erzielt werden, dass alle für ein am Kranarm befestigtbares Arbeitsgerät notwendigen Hydraulikleitungen geschützt im Inneren des Kranarms ausgebildet sind.Particularly preferably, it may be provided that the first hydraulic line is designed as an oil supply line for a working device that can be fastened to the crane arm, and the second hydraulic line is designed as an oil discharge line for the working device that can be fastened to the crane arm. By this measure, it can be achieved that all hydraulic lines necessary for a device that can be attached to the crane arm are protected in the interior of the crane arm.
Konkret wird auch Schutz begehrt für einen Kran mit wenigstens einem teleskopierbaren Kranarm nach wenigstens einer der beschriebenen Ausführungsformen.Specifically, protection is desired for a crane with at least one telescopic crane arm according to at least one of the described embodiments.
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 zeigen:
- Fig. 1
- eine Seitenansicht eines Krans mit teleskopierbarem Kranarm
- Fig. 2
- einen Schnitt durch einen teleskopierbaren Kranarm
- Fig. 3a
- einen Schnitt durch eine eingefahrene Hydraulikleitung
- Fig. 3b
- einen Schnitt durch eine ausgefahrene Hydraulikleitung
- Fig. 4a
- einen Schnitt durch eine Variante einer eingefahrenen Hydraulikleitung
- Fig. 4b
- einen Schnitt durch eine Variante einer ausgefahrenen Hydraulikleitung
- Fig. 5a
- einen Schnitt durch eine weitere Variante einer eingefahrenen Hydraulikleitung
- Fig. 5b
- einen Schnitt durch eine weitere Variante einer ausgefahrenen Hydraulikleitung
- Fig. 1
- a side view of a crane with telescopic crane arm
- Fig. 2
- a section through a telescopic crane arm
- Fig. 3a
- a section through a retracted hydraulic line
- Fig. 3b
- a section through an extended hydraulic line
- Fig. 4a
- a section through a variant of a retracted hydraulic line
- Fig. 4b
- a section through a variant of an extended hydraulic line
- Fig. 5a
- a section through another variant of a retracted hydraulic line
- Fig. 5b
- a section through another variant of an extended hydraulic line
Im Ausleger 21 ist eine relativ zum Ausleger 21 teleskopierbar bewegbare Schubstückverlängerung 22 ausgebildet.In the boom 21 a relative to the
Am Kranarm 20 ist das Arbeitsgerät 101 - in diesem Ausführungsbeispiel ein Rotator - befestigt. Am Rotator selbst ist in weiterer Folge vorgesehen ein Werkzeug zu befestigen - welches unter anderem hydraulisch betrieben werden kann - wie etwa der Kopf eines Holzvollernters. Dieses Werkzeug würde in diesem bevorzugten Ausführungsbeispiel über Hydraulikleitungen 10 und 50 (nicht dargestellt, siehe
Das Ausfahren der Schubstückverlängerung 22 erfolgt in diesem bevorzugten Ausführungsbeispiel über den hier nicht dargestellten Schubstückzylinder 23 (siehe
Fährt der Schubstückzylinder 23 aus, so kommt es zu einer Längenveränderung des Kranarms 20, da mit dem Ausfahren des Schubstückzylinders 23 die Schubstückverlängerung 22 ebenfalls ausgefahren wird.If the
Diese Längenveränderung des Kranarmes 20 durch den Schubstückzylinder 23 wirkt sich gleichzeitig auf die Hydraulikleitungen 10 und 50 aus, welche ebenfalls ihre Länge gleichzeitig verändern. Dies wird dadurch erzielt, dass die Hydraulikleitungen 10 und 50 einerseits im Ausleger 21 befestigt sind und andererseits im Inneren (24) der Schubstückverlängerung 22 befestigt sind und somit gleichzeitig mit dem Ausfahren der Schubstückverlängerung 22 ein Rohr - das zweite Rohr 2 oder das erste Rohr 1 (nicht dargestellt, siehe
In einem weiteren Ausführungsbeispiel ist es vorgesehen, dass die Hydraulikleitung 10 bzw. 50 nicht am Ausleger 21 und an der Schubstückverlängerung 22 befestigt ist, sondern dass die Hydraulikleitung 10 bzw. 50 am Schubstückzylinder 23 befestigt ist und gemeinsam mit diesem aus- bzw. einfährt.In a further embodiment, it is provided that the hydraulic line 10 and 50 is not attached to the
Ebenso ist es natürlich vorstellbar, dass eine der beiden Hydraulikleitungen 10 bzw. 50 an der anderen Hydraulikleitung 10 bzw. 50 befestigt ist und gemeinsam mit dieser verfährt.Likewise, it is of course conceivable that one of the two hydraulic lines 10 and 50 is attached to the other hydraulic line 10 and 50 and moves together with this.
Selbstverständlich sind auch alle möglichen Kombinationen der Befestigung der Hydraulikleitungen 10 bzw. 50 aneinander, am Ausleger 21, an der Schubstückverlängerung 22 und am Schubstückzylinder 23 vorstellbar und tragen zu einem äußerst kompakten Kranarm 20 bei. Bei mehrfacher Befestigung der Hydraulikleitungen 10 und 50, wie etwa sowohl an dem Schubstückzylinder 23 als auch am Ausleger 21 und auch an der Auslegerverlängerung 22 und auch untereinander kann zudem die Stabilität des Kranarmes erhöht werden.Of course, all possible combinations of attachment of the hydraulic lines 10 and 50 to each other, on the
In diesem bevorzugten Ausführungsbeispiel ist die Hydraulikleitung 10 als Ölzuführleitung 105 für das am Kranarm 20 befestigte Arbeitsgerät 101 ausgebildet und die zweite Hydraulikleitung 50 als Ölabführleitung 106 für das am Kranarm 20 befestigte Arbeitsgerät 101 ausgebildet. Ebenfalls ist es natürlich vorstellbar, dass diese Hydraulikleitungen 10 und 50 auch für andere Zwecke verwendet werden können bzw. ist es auch vorstellbar, noch weitere Hydraulikleitungen im Inneren 24 der Schubstückverlängerung 22 auszubilden.In this preferred embodiment, the hydraulic line 10 is formed as an
Diese Maßnahmen führen zu einem äußerst kompakten Kranarm durch im Wesentlichen vollständige Ausnutzung des Innenraumes 24 der Schubstückverlängerung 22. In dieser
Durch diese Teleskopierbarkeit der Hydraulikleitungen 10 bzw. 50 kann die Hydraulikleitung 10 bzw. 50 mit einem hier nicht dargestellten Kranarm 20 (siehe
Die Hydraulikleitung 10 bzw. 50 weist dabei ein ersten Rohr 1 und ein zu dem ersten Rohr 1 verschiebbares zweites Rohr 2 auf, wobei eine Verbindung 3 vom ersten Rohr 1 und/oder dem zweiten Rohr 2 zu wenigstens einem in seinem Rauminhalt 33 veränderlichen Ölausgleichsraum 4 ausgebildet ist, wodurch ein gesamter räumlicher Inhalt 30 des zweiten Rohres 2, des ersten Rohres 1 und des Ölausgleichsraums 4 in jeder Ausziehposition des zweiten Rohres 2 relativ zum ersten Rohr 1 gleich groß ist.In this case, the hydraulic line 10 or 50 has a first tube 1 and a
Der gesamte räumliche Inhalt 30 bildet sich dabei durch den zweiten Rohrrauminhalt 32, den ersten Rohrrauminhalt 31 und den Rauminhalt 33 des Ölausgleichsraumes 4. Genau genommen gehört zu dem gesamten räumlichen Inhalt 30 auch noch der Rauminhalt der Verbindung 3 hinzu, da sich dieser Rauminhalt der Verbindung 3 jedoch nicht verändert, kann dieser unberücksichtigt bleiben.The entire
Im eingefahrenen Zustand der Hydraulikleitung 10 ist der Rauminhalt 33 des veränderlichen Ölausgleichsraums 4 am größten und der zweite Rohrrauminhalt 32 des zweiten Rohres 2 am kleinsten. Verfährt nun das zweite Rohr 2 relativ zum ersten Rohr 1, so nimmt der zweite Rohrrauminhalt 32 zu und der Rauminhalt 33 des Ölausgleichsraums 4 ab, was dadurch ermöglicht wird, dass Öl vom Ölausgleichsraum 4 über die Verbindung 3 in das zweite Rohr 2 fließt. Dadurch kann erzielt werden, dass der Öldruck innerhalb der Hydraulikleitung 10 bzw. 50 in jede Ausziehposition des zweiten Rohres 2 relativ zum ersten Rohr 1 konstant ist.In the retracted state of the hydraulic line 10, the
In der Hydraulikleitung 10 bzw. 50 befindet sich noch die Luftöffnung 40, welche den ebenfalls in seinem Rauminhalt veränderlichen Raum 41 öffnet. Dies trägt zu einem bevorzugten Schubverhalten des ersten Rohres 1 relativ zum zweiten Rohr 2 bei, da ohne die Luftöffnung 40 ein Unterdruck im Raum 41 entstehen würde - während dem Ausfahren der Hydraulikleitung 10.In the hydraulic line 10 and 50 is still the
In dem hier dargestellten Ausführungsbeispiel wird das zweite Rohr 2 zusammen mit der Schubstückverlängerung 22 verschoben und das erste Rohr 1 ist ortsfest am Ausleger 21 befestigt. Für den Fachmann ist es klar, dass ebenfalls das erste Rohr 1 zusammen mit der Schubstückverlängerung 22 verschoben werden könnte und dass das zweite Rohr 2 ortsfest am Ausleger 21 befestigt sein könnte.In the embodiment shown here, the
Bei diesem bevorzugten Ausführungsbeispiel ist der Ausgleichsraum 4 außerhalb des ersten Rohres 1 und außerhalb des zweiten Rohres 2 ausgebildet. Ebenfalls ist es natürlich vorstellbar, dass der Ölausgleichsraum 4 zwischen den beiden Rohren 1 und 2 ausgebildet ist. Weiters wäre es auch vorstellbar, dass der Ölausgleichsraum 4 im ersten Rohr 1 oder im zweiten Rohr 2 ausgebildet ist. In diesem bevorzugten Ausführungsbeispiel ist weiters das erste Rohr 1 als ein Innenrohr ausgebildet und das zweite Rohr 2 als ein Außenrohr.In this preferred embodiment, the
Auch bei diesem Ausführungsbeispiel weist die Hydraulikleitung 10 bzw. 50 wenigstens ein erstes Rohr 1 und ein im ersten Rohr 1 verschiebbares zweites Rohr 2 auf, wobei die Verbindung 3 vom ersten Rohr 1 zu einem im Inneren 24 der Schubstückverlängerung 22 angeordneten Ölausgleichsraum 4 zum Ausgleich von Effekten der Längenänderung des Kranarms (20) ausgebildet ist.Also in this embodiment, the hydraulic line 10 and 50, at least a first tube 1 and a
Im eingefahrenen Zustand besteht die Verbindung 3 zwischen den beiden Rohren 1 und 2 im Wesentlichen gerade von der Rohröffnung 43 des zweiten Rohres 2 zum Ölausgleichsraum 4 und von diesem über die Rohröffnung 42 des ersten Rohres 1 in das erste Rohr 1.In the retracted state, the
Beim Ausfahren der beiden Rohre 1 und 2 verändert der Ölausgleichsraum 4 seine Form. Die Verbindung 3 besteht immer noch über die Rohröffnung 43 des zweiten Rohres 2 zum Ölausgleichsraum 4 und von diesem über die Rohröffnung 42 des ersten Rohres 1 in das erste Rohr 1, dabei wurde der Ölausgleichsraum 4 gestreckt durch die Erweiterung um die zwei Kanäle 44.When extending the two
Bei diesem Ausführungsbeispiel ändert sich der Rauminhalt 32 des zweiten Rohres 2 und der Rauminhalt 31 des ersten Rohres 1 und der Rauminhalt 33 des Ausgleichsraumes 4 weder in Summe noch einzeln, es verändert sich lediglich die Längserstreckung des Ausgleichsraumes 4. Der Rauminhalt 33 des Ausgleichsraumes 4 ist aufgrund dessen, dass die Kanäle 44 auch in eingefahrenem Zustand der beiden Rohre 1 und 2 gefüllt sind, ebenfalls konstant.In this embodiment, the
Sowohl beim Ausführungsbeispiel der
Claims (13)
- Telescopic crane arm (20) for a crane (100), in particular a mobile crane, with:- at least one boom (21), and- at least one boom extension (22) that can be moved telescopically relative to the boom (21), and- at least one hydraulic line (10, 50) arranged in the crane arm (20) for an implement (101) that can be attached to the crane arm (20) and operated hydraulically,- wherein the hydraulic line (10, 50) has at least one first tube (1) and a second tube (2) that is movable relative to the first tube (1), wherein a connection (3) is formed from the first tube (1) and/or the second tube (2) to at least one oil compensation chamber (4) arranged in the inside (24) of the crane arm (20) to compensate for effects of changing the length of the crane arm (20),characterized in that the first tube (1), the second tube (2) and the oil compensation chamber (4) are formed in the inside (24) of the boom extension (22).
- Crane arm according to claim 1, characterized in that the oil compensation chamber (4) is formed with a variable capacity (33), whereby an overall spatial capacity (30) of the first tube (1), of the second tube (2) and of the oil compensation chamber (4) is of equal size in every movement position of the first tube (1) relative to the second tube (2).
- Crane arm according to claim 1 or 2, characterized in that the oil compensation chamber (4) is formed with a variable shape, whereby the oil compensation chamber (4) alters the extension of its length in every movement position of the first tube (1) relative to the second tube (2).
- Crane arm according to one of claims 1 to 3, characterized in that the oil compensation chamber (4) is formed in or on the hydraulic line (10, 50).
- Crane arm according to one of claims 1 to 4, characterized in that one of the two tubes (1, 2) is formed as an outer tube and one is formed as an inner tube.
- Crane arm according to one of claims 1 to 5, characterized in that the crane arm (20) has at least one boom cylinder (23) for moving the boom extension (22) relative to the boom (21).
- Crane arm according to one of claims 1 to 6, characterized in that the hydraulic line (10, 50) is attached at one end to the boom (21) and at the other end to the boom extension (22).
- Crane arm according to claim 6 or 7, characterized in that the boom cylinder (23) is formed in the inside (24) of the boom extension (22).
- Crane arm according to claim 8, characterized in that the hydraulic line (10, 50) is attached to the boom cylinder (23).
- Crane arm according to one of claims 1 to 9, characterized in that two hydraulic lines (10, 50) are formed in the inside (24) of the boom extension (22).
- Crane arm according to claim 10, characterized in that the first hydraulic line (10) is attached to the second hydraulic line (50).
- Crane arm according to claim 10 or 11, characterized in that the first hydraulic line (10) is formed as an oil supply line (105) for an implement (101) that can be attached to the crane arm (20) and the second hydraulic line (50) is formed as an oil return line (106) for the implement (101) that can be attached to the crane arm (20).
- Crane (100) with at least one telescopic crane arm (20) according to one of claims 1 to 12.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11007266.7A EP2568084B1 (en) | 2011-09-07 | 2011-09-07 | Telescopic crane arm |
ES11007266.7T ES2457238T3 (en) | 2011-09-07 | 2011-09-07 | Telescopic crane arm |
RU2012138149/11A RU2012138149A (en) | 2011-09-07 | 2012-09-06 | TELESCOPIC ARROW OF THE CRANE |
US13/605,185 US20130055658A1 (en) | 2011-09-07 | 2012-09-06 | Telescopic crane arm |
CA2788882A CA2788882A1 (en) | 2011-09-07 | 2012-09-07 | Telescopic crane arm |
CN2012105062452A CN102992208A (en) | 2011-09-07 | 2012-09-07 | Telescopic crane arm and crane having the same |
ZA2012/06721A ZA201206721B (en) | 2011-09-07 | 2012-09-07 | Telescopic crane arm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11007266.7A EP2568084B1 (en) | 2011-09-07 | 2011-09-07 | Telescopic crane arm |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2568084A1 EP2568084A1 (en) | 2013-03-13 |
EP2568084B1 true EP2568084B1 (en) | 2014-01-08 |
Family
ID=44658552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11007266.7A Not-in-force EP2568084B1 (en) | 2011-09-07 | 2011-09-07 | Telescopic crane arm |
Country Status (7)
Country | Link |
---|---|
US (1) | US20130055658A1 (en) |
EP (1) | EP2568084B1 (en) |
CN (1) | CN102992208A (en) |
CA (1) | CA2788882A1 (en) |
ES (1) | ES2457238T3 (en) |
RU (1) | RU2012138149A (en) |
ZA (1) | ZA201206721B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106759572A (en) * | 2016-11-30 | 2017-05-31 | 广西大学 | One kind drives variable active degree linkage to carry out industrial waste and grabs dress operational method using servomotor |
CN106759570A (en) * | 2016-11-30 | 2017-05-31 | 广西大学 | A kind of servomotor drives has variable active degree linkage |
FR3073584B1 (en) * | 2017-11-10 | 2020-07-03 | Guima Palfinger | TELESCOPIC SYSTEM COMPRISING AT THE END A JACK ACTUATED EQUIPMENT |
SE543577C2 (en) * | 2019-08-26 | 2021-04-06 | Epiroc Rock Drills Ab | A mining machine and a method for rock excavations, as well as a method for conveying hydraulic fluid using the mining machine |
SE543971C2 (en) * | 2019-12-12 | 2021-10-12 | Virdenaes Hans Gunnar | Articulated LIFTING ARM |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3187916A (en) * | 1962-06-06 | 1965-06-08 | Shaft Machines Ltd | Mucking machines and excavators of the telescopic boom-type |
US3207044A (en) * | 1963-05-20 | 1965-09-21 | Thomas R Hall | Feeder tube cylinder |
US3666125A (en) * | 1970-09-10 | 1972-05-30 | Warner Swasey Co | Boom assembly |
FR2194895B1 (en) | 1972-08-02 | 1976-05-14 | Poclain Sa | |
US4080870A (en) * | 1977-01-10 | 1978-03-28 | Stearns Roger Corporation | Multiple position fluid conductor apparatus |
US4294572A (en) * | 1978-04-10 | 1981-10-13 | Pattison Jack E | Internal fluid communication system for power cylinders |
CA2165708A1 (en) * | 1994-12-21 | 1996-06-22 | Mitsuhiro Kishi | Oil supply mechanism in a deep excavator |
DE29722394U1 (en) * | 1997-12-18 | 1999-04-22 | Oberniehaus, Rainer, 49326 Melle | Implement |
CN201747694U (en) * | 2010-07-15 | 2011-02-16 | 徐州重型机械有限公司 | Single-cylinder pin oil cylinder and telescopic arm and crane with same |
CN102070089B (en) * | 2010-12-29 | 2012-12-26 | 三一汽车起重机械有限公司 | Crane with single-cylinder bolt type working arm as well as method and device for measuring arm length thereof |
-
2011
- 2011-09-07 ES ES11007266.7T patent/ES2457238T3/en active Active
- 2011-09-07 EP EP11007266.7A patent/EP2568084B1/en not_active Not-in-force
-
2012
- 2012-09-06 US US13/605,185 patent/US20130055658A1/en not_active Abandoned
- 2012-09-06 RU RU2012138149/11A patent/RU2012138149A/en not_active Application Discontinuation
- 2012-09-07 CN CN2012105062452A patent/CN102992208A/en active Pending
- 2012-09-07 CA CA2788882A patent/CA2788882A1/en not_active Abandoned
- 2012-09-07 ZA ZA2012/06721A patent/ZA201206721B/en unknown
Also Published As
Publication number | Publication date |
---|---|
RU2012138149A (en) | 2014-03-20 |
ZA201206721B (en) | 2013-05-29 |
CN102992208A (en) | 2013-03-27 |
CA2788882A1 (en) | 2013-03-07 |
ES2457238T3 (en) | 2014-04-25 |
US20130055658A1 (en) | 2013-03-07 |
EP2568084A1 (en) | 2013-03-13 |
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