EP0669280B1 - Lifting arrangement for detachable counterweight - Google Patents

Lifting arrangement for detachable counterweight Download PDF

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Publication number
EP0669280B1
EP0669280B1 EP95101185A EP95101185A EP0669280B1 EP 0669280 B1 EP0669280 B1 EP 0669280B1 EP 95101185 A EP95101185 A EP 95101185A EP 95101185 A EP95101185 A EP 95101185A EP 0669280 B1 EP0669280 B1 EP 0669280B1
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EP
European Patent Office
Prior art keywords
lifting
cylinder
counterweight
cage
piston rod
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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.)
Expired - Lifetime
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EP95101185A
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German (de)
French (fr)
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EP0669280A1 (en
Inventor
Reinhard Dipl.-Ing. Weber
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Grove US LLC
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Grove US LLC
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Publication of EP0669280A1 publication Critical patent/EP0669280A1/en
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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
    • 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
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib

Definitions

  • the invention relates to a turntable and two Lifting device having lifting elements for a transfer device for counterweights on jib cranes, in particular Mobile telescopic cranes, with rotating superstructure, the lifting elements with a vertical by means of a double-acting counterweight lifting cylinder extendable Link are provided in the openings of the counterweights retracted and by rotating with them can be non-positively connected, whereby into the lower end of the counterweight lift cylinder a cross bolt is inserted, which on both sides from the protrudes lower end of the counterweight lifting cylinder and a non-positive in the rotated position Connects to the counterweights,
  • the special safety of the lifting device according to the invention is due to the fact that turning the Counterweight stroke cylinder only in the extended position is possible because then at the upper end of the Counterweight stroke cylinder arranged square inside of the lower, rotatable cylinder cage. As long as the square in the upper, solid cylinder cage is a rotation of the counterweight lift cylinder impossible. It is therefore also a total misuse locked out.
  • a concentrically arranged inductive Path length encoder is provided and has the piston rod head each lifting element has a hole through it which led out the cable of the inductive path length encoder is.
  • the lifting device is therefore electronic monitorable. With the lifting device according to this embodiment the same operations are carried out as with the known lifting devices.
  • the crane operator needs but no longer the crane cabin on the superstructure leave, but controls the operations of its instrument panel to which the cable of the inductive path length sensor is introduced. So the crane operator can also take the counterweight by lifting the counterweights into position "Crane work” and the reverse of it, namely the Put the counterweights in position "Crane driving" from the crane cabin.
  • the Inductive path length measuring device shows the crane operator the instrument panel always the exact lifting condition of the Lifting element.
  • upper, fixed cylinder cage of the lifting elements Provide piston rod head with holes through which the piston surface and the annular surface of the lifting elements be supplied with oil.
  • Cylinder suspension is the piston rod, especially if it is ground as usual against damage protected and maintenance-free.
  • both single as well as several counterweights at the same time be lifted.
  • the jib crane 1 shown in Fig. 1 consists of the undercarriage 2, which is connected to the Superstructure 4 is connected. On the superstructure 4 is one Fixed lifting device 5, the counterweights 6th wearing.
  • Lifting device 5 on a turntable 7 consisting of two lifting elements 8R and 8L, which have an upper cylinder cage 9 and have a lower cylinder cage 10.
  • the upper Cylinder 9 is by means of a base plate 11, the forms the upper part of a ball slewing ring 12, firmly attached to the turntable 7, while the lower Cylinder 10 is rotatable.
  • a counterweight lift cylinder 13 is guided in the lower end of which a cross pin 14 is inserted, the bilaterally from the lower end of the counterweight lifting cylinder 13 protrudes.
  • the lifting elements 8R and 8L are each with an actuating cylinder 16 provided.
  • the piston rod 17 of the actuating cylinder 16 is hinged to the lower, rotatable cylinder cage 10, while the rear end of the actuating cylinder 16 is connected to the turntable 7 by means of a bolt.
  • Fig. 5 shows an essentially from the upper, fixed Cylinder 9 and the lower, rotatable cylinder cage 10 and the counterweight lifting cylinder 13 guided therein existing lifting element 8L.
  • the cylinder cages 9 and 10 have a square cross section and are through the ball slewing ring 12 connected to each other.
  • the upper part of the ball slewing ring 12 forms the with the turntable 7 connected base plate 11 of upper, fixed cylinder cage 9.
  • 11 holes 18 are provided on the base plate.
  • On the lower, rotatable cylinder cage 10 is the piston rod 17 of the actuating cylinder 16 (see FIGS. 2 to 4) articulated.
  • the counterweight lift cylinder 13 instructs at its upper end a square 19, which in the square interior of the cylinder cages 9 and 10 is slidably guided.
  • the piston rod head 21 of the piston rod 20 is included Bores 22 and 23 provided, the bore 22 of the Oil supply to the piston surface and the bore 23 of the Oil supply to the ring surface of the lifting element 8L is used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Description

Die Erfindung betrifft eine einen Drehtisch und zwei Hubelemente aufweisende Hubeinrichtung für eine Umsetzvorrichtung für Gegengewichte an Auslegerkranen, insbesondere Mobilteleskopkranen, mit drehbarem Oberwagen, wobei die Hubelemente mit einem senkrecht mittels eines doppeltwirkenden Gegengewichtshubzylinders ausfahrbaren Glied versehen sind, das in Öffnungen der Gegengewichte eingefahren und durch eine Drehbewegung mit diesen kraftschlüssig verbunden werden kann, wobei in das untere Ende des Gegengewichtshubzylinders ein Querbolzen eingesteckt ist, der beidseitig aus dem unteren Ende des Gegengewichtshubzylinders hervorragt und der in gedrehter Stellung eine kraftschlüssige Verbindung mit den Gegengewichten herstellt, The invention relates to a turntable and two Lifting device having lifting elements for a transfer device for counterweights on jib cranes, in particular Mobile telescopic cranes, with rotating superstructure, the lifting elements with a vertical by means of a double-acting counterweight lifting cylinder extendable Link are provided in the openings of the counterweights retracted and by rotating with them can be non-positively connected, whereby into the lower end of the counterweight lift cylinder a cross bolt is inserted, which on both sides from the protrudes lower end of the counterweight lifting cylinder and a non-positive in the rotated position Connects to the counterweights,

Bei den bekannten Hubeinrichtungen der vorgenannten Art (DE 39 12 868 C1, DE 41 24 173 A1) sind für das Drehen des ausfahrbaren Gliedes zur Herstellung einer kraftschlüssige Verbindung mit den Gegengewichten aufwendige Schwenktriebe mit Zahnstangen, Ritzeln u. dgl. erforderlich; sie verursachen daher hohe Herstellungskosten und sind sehr störungsanfällig.In the known lifting devices of the aforementioned type (DE 39 12 868 C1, DE 41 24 173 A1) are for turning of the extendable link to produce a non-positive Complex connection with the counterweights Swivel drives with racks, pinions and. like. required; therefore, they cause high manufacturing costs and are very susceptible to failure.

Der Erfindung liegt die Aufgabe zugrunde, eine Hubeinrichtung für eine Umsetzvorrichtung der eingangs genannten Art so auszubilden, daß sie technisch sehr einfach und kostengünstig herzustellen ist und darüber hinaus ein Höchstmaß an Sicherheit bietet. Diese Aufgabe wird bei einer gattungsgemäßen Hubeinrichtung für eine Umsetzvorrichtung dadurch gelöst,

  • daß die Hubelemente einen oberen, festen Zylinderkäfig und einen unteren, drehbaren Zylinderkäfig aufweisen, die aus einem Vierkantrohr gebildet und durch eine Kugeldrehverbindung miteinander verbunden sind, wobei der obere Teil der Kugeldrehverbindung die Grundplatte des festen Zylinderkäfigs bildet und mit dem Drehtisch fest verbunden ist;
  • daß in den beiden Zylinderkäfigen des Hubelements der Gegengewichtshubzylinder angeordnet ist, an dessen oberem Ende ein Vierkant befestigt ist, der in den Zylinderkäfigen des Hubelements gleitend geführt ist;
  • und daß an dem unteren, drehbaren Zylinderkäfig die Kolbenstange eines mittels eines Bolzens an dem Drehtisch befestigten Stellzylinders derart angelenkt ist, daß durch Ausfahren der Kolbenstange eine Drehung des unteren, drehbaren Zylinderkäfigs bewirkt wird.
The invention has for its object to provide a lifting device for a transfer device of the type mentioned in such a way that it is technically very simple and inexpensive to manufacture and also offers the highest level of safety. In a generic lifting device for a transfer device, this object is achieved by
  • in that the lifting elements have an upper, fixed cylinder cage and a lower, rotatable cylinder cage, which are formed from a square tube and are connected to one another by a ball slewing joint, the upper part of the ball slewing joint forming the base plate of the fixed cylinder cage and being firmly connected to the turntable;
  • that the counterweight lifting cylinder is arranged in the two cylinder cages of the lifting element, at the upper end of which a square is fastened, which is slidably guided in the cylinder cages of the lifting element;
  • and that on the lower, rotatable cylinder cage, the piston rod of an actuating cylinder fastened by means of a bolt to the rotary table is articulated in such a way that rotation of the lower, rotatable cylinder cage is effected by extending the piston rod.

Die besondere Sicherheit der erfindungsgemäßen Hubeinrichtung ist darauf zurückzuführen, daß das Drehen des Gegengewichtshubzylinders nur in ausgefahrener Stellung möglich ist, weil sich dann der an dem oberen Ende des Gegengewichtshubzylinders angeordnete Vierkant innerhalb des unteren, drehbaren Zylinderkäfigs befindet. Solange sich der Vierkant in dem oberen, festen Zylinderkäfig befindet, ist eine Drehung des Gegengewichtshubzylinders unmöglich. Es ist daher auch eine Fehlbedienung völlig ausgeschlossen.The special safety of the lifting device according to the invention is due to the fact that turning the Counterweight stroke cylinder only in the extended position is possible because then at the upper end of the Counterweight stroke cylinder arranged square inside of the lower, rotatable cylinder cage. As long as the square in the upper, solid cylinder cage is a rotation of the counterweight lift cylinder impossible. It is therefore also a total misuse locked out.

In Ausgestaltung der Erfindung ist im Inneren der Hubelemente ein konzentrisch angeordneter induktiver Weglängenmeßgeber vorgesehen und weist der Kolbenstangenkopf jedes Hubelements eine Bohrung auf, durch die das Kabel des induktiven Weglängenmeßgebers herausgeführt ist. Die Hubeinrichtung ist dadurch elektronisch überwachbar. Bei der Hubeinrichtung gemäß dieser Ausführungsform werden zwar die gleichen Vorgänge ausgeführt, wie bei den bekannten Hubeinrichtungen. Der Kranführer braucht hierzu aber nicht mehr die Krankabine am Oberwagen zu verlassen, sondern steuert die Arbeitsvorgänge von seiner Instrumententafel aus, an die das Kabel des induktiven Weglängenmeßgebers herangeführt ist. So kann der Kranführer auch die Gegengewichtsaufnahme durch Heben der Gegengewichte in die Position "Kranarbeiten" sowie die Umkehrung davon, nämlich das Ablegen der Gegengewichte in die Position "Kranfahren", von der Krankabine aus durchführen. Der induktive Weglängenmeßgeber zeigt dem Kranführer auf der Instrumententafel stets den genauen Hubzustand des Hubelementes an.In one embodiment of the invention is inside Lifting elements a concentrically arranged inductive Path length encoder is provided and has the piston rod head each lifting element has a hole through it which led out the cable of the inductive path length encoder is. The lifting device is therefore electronic monitorable. With the lifting device according to this embodiment the same operations are carried out as with the known lifting devices. The crane operator needs but no longer the crane cabin on the superstructure leave, but controls the operations of its instrument panel to which the cable of the inductive path length sensor is introduced. So the crane operator can also take the counterweight by lifting the counterweights into position "Crane work" and the reverse of it, namely the Put the counterweights in position "Crane driving" from the crane cabin. Of the Inductive path length measuring device shows the crane operator the instrument panel always the exact lifting condition of the Lifting element.

Da es zur genauen Lagebestimmung des Hubelementes zweckmäßig ist, auch eine Information über den Querbolzen zu haben, sind bei einer bevorzugten Ausführungsform der Erfindung auf der Grundplatte des oberen, festen Zylinderkäfigs jedes Hubelements zwei Druckschalter angeordnet. Über diese Druckschalter werden die Stellungen "offen" und "verriegelt" auf der Instrumententafel angezeigt.Since it is used to determine the exact position of the lifting element It is also useful to have information about the cross bolt are available in a preferred embodiment the invention on the base plate of the upper, fixed cylinder cage of each lifting element two Pressure switch arranged. About this pressure switch the positions "open" and "locked" on the Instrument panel displayed.

In weiterer Ausgestaltung der Erfindung ist der im oberen, festen Zylinderkäfig der Hubelemente befindliche Kolbenstangenkopf mit Bohrungen versehen, durch die die Kolbenfläche und die Ringfläche der Hubelemente mit Öl versorgt werden. Durch diese Art der Zylinderaufhängung ist die Kolbenstange, zumal wenn sie wie üblich geschliffen ist, gegen Beschädigungen geschützt und wartungsfrei.In a further embodiment of the invention upper, fixed cylinder cage of the lifting elements Provide piston rod head with holes through which the piston surface and the annular surface of the lifting elements be supplied with oil. Through this type of Cylinder suspension is the piston rod, especially if it is ground as usual against damage protected and maintenance-free.

Da bei der erfindungsgemäßen Hubeinrichtung die Gegengewichtsaufnahme und die Gegengewichtsablage in genau umgekehrter Reihenfolge ablaufen, ist die Bedienung der Hubeinrichtung besonders einfach. Since in the lifting device according to the invention the counterweight and the counterweight shelf in exactly the reverse sequence is the operation the lifting device is particularly simple.

Mit der erfindungsgemäßen Hubeinrichtung können sowohl einzelne als auch mehrere Gegengewichte gleichzeitig gehoben werden.With the lifting device according to the invention, both single as well as several counterweights at the same time be lifted.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung näher erläutert. Es zeigen in schematischer Darstellung:

Fig. 1
eine Seitenansicht eines Auslegerkrans in Fahrtstellung mit Gegengewichten;
Fig. 2
einen Schnitt in Kranlängsrichtung durch die in Fahrtrichtung rechtsliegende Hubeinrichtung des in Fig. 1 dargestellten Auslegerkrans, wobei das Hubelement in verriegelter Stellung dargestellt ist;
Fig. 3
eine um 90° gedrehte Draufsicht auf die in Fig. 2 dargestellte Hubeinrichtung und auf die Gegengewichte, wobei in der linken Hälfte der Zeichnung das Hubelement in entriegelter und in der rechten Hälfte der Zeichnung das Hubelement in verriegelter Stellung dargestellt ist;
Fig. 4
die in den Fig. 2 und 3 dargestellte Hubeinrichtung in einem Querschnitt, wobei ebenfalls in der linken Hälfte der Zeichnung das Hubelement in entriegelter und in der rechten Hälfte der Zeichnung das Hubelement in verriegelter Stellung dargestellt ist;
Fig. 5
ein Hubelement in einem Längsschnitt, in größerem Maßstab.
The invention is explained in more detail below using an exemplary embodiment in conjunction with the drawing. In a schematic representation:
Fig. 1
a side view of a jib crane in the travel position with counterweights;
Fig. 2
a section in the longitudinal direction of the crane through the lifting device on the right in the direction of travel of the jib crane shown in FIG. 1, the lifting element being shown in the locked position;
Fig. 3
a 90 ° rotated top view of the lifting device shown in Figure 2 and the counterweights, the lifting element is shown in the unlocked position in the left half of the drawing and the lifting element in the locked position in the right half of the drawing;
Fig. 4
the lifting device shown in Figures 2 and 3 in a cross section, the lifting element is also shown in the unlocked position in the left half of the drawing and the lifting element in the locked position in the right half of the drawing.
Fig. 5
a lifting element in a longitudinal section, on a larger scale.

Der in Fig. 1 dargestellte Auslegerkran 1 besteht aus dem Unterwagen 2, der durch ein Dehverbindung 3 mit dem Oberwagen 4 verbunden ist. An dem Oberwagen 4 ist eine Hubeinrichtung 5 befestigt, die die Gegengewichte 6 trägt.The jib crane 1 shown in Fig. 1 consists of the undercarriage 2, which is connected to the Superstructure 4 is connected. On the superstructure 4 is one Fixed lifting device 5, the counterweights 6th wearing.

Wie aus den Fig. 2 bis 4 zu ersehen ist, besteht die Hubeinrichtung 5 an einem Drehtisch 7 aus zwei Hubelementen 8R und 8L, die einen oberen Zylinderkäfig 9 und einen unteren Zylinderkäfig 10 aufweisen. Der obere Zylinderkäfig 9 ist mittels einer Grundplatte 11, die den oberen Teil einer Kugeldrehverbindungen 12 bildet, fest an dem Drehtisch 7 angebracht, während der untere Zylinderkäfig 10 drehbar ist. In den Zylinderkäfigen 9 und 10 ist ein Gegengewichtshubzylinder 13 geführt, in dessen unteres Ende ein Querbolzen 14 eingesteckt ist, der beidseitig aus dem unteren Ende des Gegengewichtshubzylinders 13 hervorragt.As can be seen from FIGS. 2 to 4, there is Lifting device 5 on a turntable 7 consisting of two lifting elements 8R and 8L, which have an upper cylinder cage 9 and have a lower cylinder cage 10. The upper Cylinder 9 is by means of a base plate 11, the forms the upper part of a ball slewing ring 12, firmly attached to the turntable 7, while the lower Cylinder 10 is rotatable. In the cylinder cages 9 and 10, a counterweight lift cylinder 13 is guided in the lower end of which a cross pin 14 is inserted, the bilaterally from the lower end of the counterweight lifting cylinder 13 protrudes.

Bei der Stellung des Hubelementes 8R gemäß Fig. 2 und den rechten Hälften der Fig. 3 und 4 ist die Hubeinrichtung verriegelt und die Gegengewichte 6 sind von dem Hubelement 8R aufgenommen, während bei der Steilung des Hubelementes 8L gemäß den linken Hälften der Fig. 3 und 4 die Hubeinrichtung entriegelt ist und die Gegengewichte 6 auf dem Fahrwerksrahmen 15 abgelegt sind (vgl. Fig. 4, linke Hälfte).In the position of the lifting element 8R according to FIGS. 2 and the right half of FIGS. 3 and 4 is the lifting device locked and the counterweights 6 are from the lifting element 8R added while on the slope of the lifting element 8L according to the left halves of FIG. 3 and 4 the lifting device is unlocked and the counterweights 6 are stored on the chassis frame 15 (see Fig. 4, left half).

Die Hubelemente 8R und 8L sind mit je einen Stellzylinder 16 versehen. Die Kolbenstange 17 des Stellzylinders 16 ist an dem unteren, drehbaren Zylinderkäfig 10 angelenkt, während das hintere Ende des Stellzylinders 16 mittels eines Bolzens mit dem Drehtisch 7 verbunden ist. The lifting elements 8R and 8L are each with an actuating cylinder 16 provided. The piston rod 17 of the actuating cylinder 16 is hinged to the lower, rotatable cylinder cage 10, while the rear end of the actuating cylinder 16 is connected to the turntable 7 by means of a bolt.

Fig. 5 zeigt ein im wesentlichen aus dem oberen, festen Zylinderkäfig 9 und dem unteren, drehbaren Zylinderkäfig 10 sowie dem darin geführten Gegengewichtshubzylinder 13 bestehendes Hubelement 8L. Die Zylinderkäfige 9 und 10 weisen einen viereckigen Querschnitt auf und sind durch die Kugeldrehverbindung 12 miteinander verbunden. Der obere Teil der Kugeldrehverbindung 12 bildet dabei die mit dem Drehtisch 7 verbundene Grundplatte 11 des oberen, festen Zylinderkäfigs 9. Für die Verbindung der Grundplatte 11 mit dem Drehtisch 7 (vgl. Fig. 2 bis 4) sind an der Grundplatte 11 Bohrungen 18 vorgesehen. An dem unteren, drehbaren Zylinderkäfig 10 ist die Kolbenstange 17 des Stellzylinders 16 (vgl. Fig. 2 bis 4) angelenkt. Der Gegengewichtshubzylinder 13 weist an seinem oberen Ende einen Vierkant 19 auf, der in den viereckigen Innenräumen der Zylinderkäfige 9 und 10 gleitend geführt ist.Fig. 5 shows an essentially from the upper, fixed Cylinder 9 and the lower, rotatable cylinder cage 10 and the counterweight lifting cylinder 13 guided therein existing lifting element 8L. The cylinder cages 9 and 10 have a square cross section and are through the ball slewing ring 12 connected to each other. Of the the upper part of the ball slewing ring 12 forms the with the turntable 7 connected base plate 11 of upper, fixed cylinder cage 9. For connecting the Base plate 11 with the turntable 7 (see FIGS. 2 to 4) 11 holes 18 are provided on the base plate. On the lower, rotatable cylinder cage 10 is the piston rod 17 of the actuating cylinder 16 (see FIGS. 2 to 4) articulated. The counterweight lift cylinder 13 instructs at its upper end a square 19, which in the square interior of the cylinder cages 9 and 10 is slidably guided.

Der Kolbenstangenkopf 21 der Kolbenstange 20 ist mit Bohrungen 22 und 23 versehen, wobei die Bohrung 22 der Ölzufuhr zur Kolbenfläche und die Bohrung 23 der Ölzufuhr zur Ringfläche des Hubelements 8L dient.The piston rod head 21 of the piston rod 20 is included Bores 22 and 23 provided, the bore 22 of the Oil supply to the piston surface and the bore 23 of the Oil supply to the ring surface of the lifting element 8L is used.

Im Inneren des Hubelements 8L ist ein konzentrisch angeordneter induktiver Weglängenmeßgeber 24 vorgesehen, dessen Kabel 25 durch eine in dem Kolbenstangenkopf 21 vorgesehene Bohrung 26 aus dem Hubelement 8L herausgeführt ist. An der Grundplatte 11 des oberen Zylinderkäfigs 9 sind Druckschalter 27 angeordnet.Inside the lifting element 8L is a concentrically arranged one inductive path length transmitter 24 provided, whose cable 25 through a in the piston rod head 21st provided bore 26 out of the lifting element 8L is. On the base plate 11 of the upper cylinder cage 9 pressure switches 27 are arranged.

Bei der Absenkung des Gegengewichtshubzylinders 13 gleitet der Vierkant 19 an dem viereckigen Innenraum des oberen, festen Zylinderkäfigs 9 entlang nach unten und gelangt schließlich in den viereckigen Innenraum des unteren, drehbaren Zylinderkäfig 10. Wenn sich der Vierkant 19 vollständig in dem viereckigen Innenraum des drehbaren Zylinderkäfigs 10 befindet, hat sich der Querbolzen 14 durch die Öffnungen der Gegengewichte 6 bewegt. Er befindet sich am Schluß des Hubes innerhalb eines Hohlraums 28 (vgl. Fig. 2), der in den Gegengewichten 6 vorgesehen ist und der der Zentrierung der Gegengewichte 6 auch untereinander dient. Nun kann der Stellzylinder 16 durch seinen Kolbenhub mittels der Kolbenstange 17 eine Drehung des unteren Zylinderkäfigs 10 ausführen. Dabei bewirkt der Vierkant 19 eine gleichzeitige Drehung des Gegengewichtshubzylinders 13, so daß der in dessen Ende eingesteckte Querbolzen 14 in die Verriegelungsstellung gedreht, also eine kraftschlüssige Verbindung mit den Gegengewichten 6 hergestellt wird (vgl. Fig. 2).When lowering the counterweight lifting cylinder 13 the square 19 slides on the square interior of the upper, fixed cylinder cage 9 along down and finally gets into the square interior of the lower, rotatable cylinder cage 10. If the Square 19 completely in the square interior of the rotatable cylinder cage 10 has the cross bolt 14 through the openings of the counterweights 6 moves. It is at the end of the Hubes within a cavity 28 (see. Fig. 2), the is provided in the counterweights 6 and the Centering the counterweights 6 also with each other serves. Now the actuating cylinder 16 through his Piston stroke by means of the piston rod 17 a rotation of the lower cylinder cage 10. Doing so the square 19 a simultaneous rotation of the counterweight lifting cylinder 13, so that in the end inserted cross bolt 14 in the locking position rotated, so a non-positive connection is produced with the counterweights 6 (see Fig. 2).

Claims (4)

  1. A lifting means (5) comprising a turntable (7) and two lifting elements (8R, 8L) for a counterweight (6) transfer device on boom cranes (1), more particularly mobile telescopic cranes, including a slewable upper structure (4), said lifting elements (8R, 8L) being provided with a member vertically extensible by means of double-acting counterweight lifting cylinder extensible in openings in said counterweights (6) and non-positively connectable thereto by a rotary movement, a crosspin (14) being inserted in the lower end of said counterweight lifting cylinder (13), this crosspin (14) protruding on both sides from said lower end of said counterweight lifting cylinder (13) and which in said rotated position produces a non-positive connection with said counterweights (6),
    characterized in that
    said lifting elements (8R, 8L) comprise an upper fixed cylinder cage (9) and a lower rotatable cylinder cage (10) formed from a square-section tube and connected to each other by a ball-bearing slewing ring (12), said upper part of said ball-bearing slewing ring (12) forming said baseplate (11) of said fixed cylinder cage (9) and is fixedly connected to said turntable (7),
    in said two cylinder cages (9, 10) of said lifting element (8R, 8L) said counterweight lifting cylinder (13) is arranged, at the upper end of which a quad ring (19) is secured slidingly guided in said cylinder cages (9, 10) of said lifting element (8R, 8L),
    and that at said lower rotatable cylinder cage (10) the piston rod (17) of a positioning cylinder (16) secured by a pin to said turntable (7) is jointed so that by extending said piston rod (17) a rotation of said lower rotatable cylinder cage (10) is achieved.
  2. The lifting means as set forth in claim 1, characterized in that a concentrically arranged inductive linear transducer (24) is provided in the interior of said lifting elements (8R, 8L) and the piston rod head (21) of each lifting element (8R, 8L) comprises with a hole (26) through which the cable (25) of said inductive linear transducer (24) is brought out.
  3. The lifting means as set forth in claim 2, characterized in that two pressure switches (27) are arranged on said baseplate (11) of said upper fixed cylinder cage (9) of each lifting element.
  4. The lifting means as set forth in claim 1, 2 or 3, characterized in that said piston rod head (21) located in said upper fixed cylinder cage (9) of said lifting elements (8R, 8L) is provided with passages (22, 23) through which the piston surface area and the ring surface area of said lifting elements is supplied with oil.
EP95101185A 1994-02-23 1995-01-28 Lifting arrangement for detachable counterweight Expired - Lifetime EP0669280B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4405780A DE4405780A1 (en) 1994-02-23 1994-02-23 Lifting device for a transfer device
DE4405780 1994-02-23

Publications (2)

Publication Number Publication Date
EP0669280A1 EP0669280A1 (en) 1995-08-30
EP0669280B1 true EP0669280B1 (en) 1999-06-02

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US (1) US5524777A (en)
EP (1) EP0669280B1 (en)
JP (1) JP3675871B2 (en)
DE (2) DE4405780A1 (en)
ES (1) ES2132440T3 (en)

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ES2132440T3 (en) 1999-08-16
US5524777A (en) 1996-06-11
DE59506061D1 (en) 1999-07-08
JP3675871B2 (en) 2005-07-27
EP0669280A1 (en) 1995-08-30
DE4405780A1 (en) 1995-08-24

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