EP0597334A1 - Transfer device - Google Patents

Transfer device Download PDF

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Publication number
EP0597334A1
EP0597334A1 EP93117550A EP93117550A EP0597334A1 EP 0597334 A1 EP0597334 A1 EP 0597334A1 EP 93117550 A EP93117550 A EP 93117550A EP 93117550 A EP93117550 A EP 93117550A EP 0597334 A1 EP0597334 A1 EP 0597334A1
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EP
European Patent Office
Prior art keywords
rod head
plunger
counterweights
piston rod
piston
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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.)
Granted
Application number
EP93117550A
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German (de)
French (fr)
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EP0597334B1 (en
Inventor
Reinhard Dipl.-Ing. Weber
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Kidde Industries Inc
Original Assignee
Krupp Industietechnik GmbH
Fried Krupp AG Hoesch Krupp
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Publication of EP0597334A1 publication Critical patent/EP0597334A1/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 transfer device for counterweights on jib cranes, in particular mobile telescopic cranes with a rotatable superstructure and at least one vertically acting hydraulic lifting device arranged thereon for coupling and uncoupling as well as lifting and depositing the counterweights.
  • Counterweights on a jib crane have the task of making the crane stable with large outreaches of the jib due to its mass. For reasons of self-weight distribution, some or all of the weights for the driving condition are stored in the front area of the undercarriage. By half a turn of the upper part of the crane, the crane operator can lift these counterweights back into the working position on the turntable that carries the boom by means of a transfer device.
  • Such implementation devices are known in various versions, for example from German Offenlegungsschrift 36 11 593.
  • the arrangement described there is relatively complex in terms of structure and handling. It is an object of the present invention to provide a simpler and at least equally reliable transfer device.
  • the several latch levers for releasably receiving the piston rod head comprises a spring-loaded plunger which is displaceable by the push pin in the position of the piston rod head between the ratchet levers and a locking bolt on which the plunger rests in its end position and which, when the plunger is lifted off, is enclosed by the two retaining pawls of a locking pliers arranged on the undercarriage, which when the plunger is on Tappet of this is open against spring pressure.
  • the pawl levers are shaped in such a way that they open automatically when the piston rod head is retracted, but only when the piston rod head is extended when the push pin is retracted. This arrangement ensures a particularly high level of operational safety, since the pawl lever is mechanically positively locked when the push pin is extended.
  • the transfer device is equipped with two lifting devices arranged side by side on the turntable 1 of the jib crane, each with a lifting cylinder 2, a piston rod 3 and a piston rod head 4.
  • a small piston 5 is guided in the piston rod 2 for extending a push pin 6.
  • the base plate 8 serves to accommodate counterweights 10, which are provided with recesses for the mast 9.
  • Four pawl levers 11 are articulated on the mast 9.
  • a plunger 12 is guided centrally under the pressure of a plunger spring 13 over a path determined by an elongated hole 14.
  • the counterweights 10 are on the undercarriage 7 behind the driver's cab. They have been stacked on the base plate 8 in the number required for the next intended use. From here they are lifted under the turntable 1 for the operating state (Fig. 2). For this purpose, two lifting devices are attached under the turntable 1.
  • Each piston rod 3 of the lifting devices is extended by means of oil pressure. The length of the piston rod 3 is dimensioned such that it reaches an area in the mast 9 in which the counterweights 10 are coupled and released.
  • the round and downward blunt wedge-shaped piston rod head 4 of the piston rod 3 is designed such that when it reaches and drives into the mast 9, it presses the rotatably mounted ratchet lever 11 located there from the center perpendicular (FIG. 3).
  • the Pawl lever 11 When moving further into the mast, the Pawl lever 11 is tilted back towards the center by the piston rod head 4, thereby laying almost positively around the piston rod head 4 and enclosing it in its central free space. Then the push pin 6 is moved out of the piston rod head 4.
  • a round plunger 12 is reached. This plunger 12 is now pressed down so far that it releases its positive connection with the undercarriage 7 in the lower part of the mast 9.
  • the release takes place in that the plunger 12, on its way down, presses two holding pawls 16 of a locking pliers 17 from the perpendicular to the outside.
  • the counterweights 10 to be picked up are now detached from the undercarriage. Then the counterweights 10 are lifted by the hydraulic lifting device.
  • the piston rod head 4 of the lifting cylinder 2 has moved against a fixed position in the tappet end position. This must be achieved so that the further process can take place.
  • the small single-acting hydraulic cylinder (Fig. 7) integrated in the piston rod 3 acts on the push pin 6 of the piston rod head 4. If the small piston 5 were now extended by means of oil pressure and with it also the push pin 6 of the piston rod head 4, the length of the lifting device would be without Stop has been increased by this stroke. However, since the piston rod head 4 has moved against this fixed stop together with the push pin 6, the height of the small piston 5 does not change, but the piston rod 3 is pushed upwards relative to the small piston 5. This effect is also used later in order to be able to push the small piston 5 back into its starting position. Then there is the lifting of the base plate 8 with the mast 9 and the counterweights 10 stacked thereon.
  • the oil pressure on the ring surface of the counterweight lifting cylinder causes the piston rod 3 to retract.
  • the piston rod head 4 with the small piston 5 extended moves upward.
  • the upper inclined surface of the piston rod head 4 lies in the incline of the pawl levers 11.
  • the pawl levers 11 want to open upwards. But they are prevented in their opening rotation by the push pin 6 of the piston rod head 4.
  • the lower part of the pawl lever 11 presses against the push pin 6 of the piston rod head 4 and blocks it.
  • the piston rod head 4 is positively connected to the mast 9. Retracting the small piston 5 is not possible because of the single-acting function.
  • the counterweights 10 are raised to their upper position. In order to prevent sinking, hydraulic accumulators are connected to the ring surfaces of the cylinders.
  • the counterweights 10 are placed on the undercarriage accordingly.
  • the oil pressure on the piston side of the lifting cylinder 2 causes the piston rods 3 to extend.
  • the lifting frame 9 with the base plate 8 and counterweight 10 are brought into their correct position by means of guides on the undercarriage.
  • the two retaining pawls 16 of each locking pliers 17 on each side in the undercarriage are pressed aside when the lifting frame 9 is placed on the undercarriage 7 by the locking bolt 15 in the lifting frame 9 (FIG. 5).
  • the formation of the upper surfaces of the pawls 16 causes this spreading against the compression spring 18 beyond the storage.
  • the holding pawls 16 move on the principle of counter shears.
  • the plunger 12 slides upward after the hydraulic pressure holding it down under the action of the plunger spring 13 to release the piston rod head 4, it releases the space above the locking bolt 15.
  • the holding pawls 16 of the locking pliers 17 can reach around the locking bolt 15 in their closed position.
  • the release of the pawl lever 11 from the piston rod head 4 takes place in accordance with the locking described above.
  • the plunger 12 is on the locking bolt 15 in its end position.
  • the small piston 5 in the piston rod head 4 is still extended.

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

Abstract

Transfer devices for counterweights (10) on jib cranes, in particular mobile telescopic cranes, with a revolving superstructure and at least one perpendicularly acting hydraulic lifting device, arranged on the revolving superstructure, for the coupling and uncoupling as well as the lifting and setting-down of the counterweights (10), are to be simple to manufacture, easy to manipulate, easy to maintain and operationally reliable. The lifting device is therefore equipped with a wedge-shaped piston-rod head (4) and a thrust pin (6) axially extendable from the piston-rod head (4). A base plate (8) carrying the counterweights (10) is provided with a lifting frame (9) passing through the counterweights (10). The lifting frame (9) contains several pawl levers (11) for releasably accommodating the piston-rod head (4), a spring-mounted plunger (12) displaceable in the position of the piston-rod head (4) between the pawl levers (11) by the thrust pin (6), and a transverse locking bolt (15). In its end position, the plunger (12) rests on the locking bolt (15). When the plunger (12) is lifted, the locking bolt (15) is enclosed by the holding pawls (16) of a locking grip (17) arranged on the travel unit (7). When the plunger (12) is resting on the locking bolt (15), the locking grip (17) is opened by the plunger (12) against spring pressure. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Umsetzvorrichtung für Gegengewichte an Auslegerkranen, insbesondere Mobilteleskopkranen mit drehbarem Oberwagen und mindestens einer an diesem angeordneten senkrecht wirkenden hydraulischen Hubeinrichtung zum An- und Abkuppeln sowie Anheben und Absetzen der Gegengewichte. Gegengewichte an einem Auslegerkran haben die Aufgabe, durch ihre Masse den Kran bei großen Ausladungen des Auslegers standsicher zu machen. Aus Gründen der Eigengewichtsverteilung werden ein Teil oder alle Gewichte für den Fahrzustand im vorderen Bereich des Unterwagens abgelegt. Durch eine halbe Drehung des oberen Teils des Krans kann der Kranführer mittels einer Umsetzvorrichtung diese Gegengewichte wieder in die Arbeitsposition am Drehtisch, der den Ausleger trägt, heben. Derartige Umsetzvorrichtungen sind in verschiedenen Ausführungen beispielsweise aus der deutschen Offenlegungsschrift 36 11 593 bekannt. Die dort beschriebene Anordnung ist nach Aufbau und Handhabung verhältnismäßig aufwendig. Es ist Aufgabe der vorliegenden Erfindung, eine einfachere und mindestens ebenso betriebssichere Umsetzvorrichtung zu schaffen. Danach wird für eine Umsetzvorrichtung der eingangs genannten Art vorgeschlagen, die Hubeinrichtung mit einem keilförmigen Kolbenstangenkopf und einem aus diesem achsial ausfahrbaren Schubstift zu versehen und eine die Gegengewichte tragende Grundplatte mit einem sie und die Gegengewichte durchsetzenden Hubgerüst vorzusehen, das mehrere Klinkenhebel zur lösbaren Aufnahme des Kolbenstangenkopfes, einen in der Lage des Kolbenstangenkopfes zwischen den Klinkenhebeln durch den Schubstift verschiebbaren gefederten Stößel und einen guerliegenden Verriegelungsbolzen umfaßt, auf dem der Stößel in seiner Endlage aufliegt und der bei abgehobenem Stößel von den beiden Halteklinken einer am Unterwagen angeordneten Verriegelungszange umschlossen ist, die bei aufliegendem Stößel von diesem gegen Federdruck geöffnet ist. Dadurch ist eine sehr günstig herzustellende und leicht zu bedienende Konstruktion erreicht, die überdies kaum einer Wartung bedarf und eine sehr geringe Störanfälligkeit besitzt.The invention relates to a transfer device for counterweights on jib cranes, in particular mobile telescopic cranes with a rotatable superstructure and at least one vertically acting hydraulic lifting device arranged thereon for coupling and uncoupling as well as lifting and depositing the counterweights. Counterweights on a jib crane have the task of making the crane stable with large outreaches of the jib due to its mass. For reasons of self-weight distribution, some or all of the weights for the driving condition are stored in the front area of the undercarriage. By half a turn of the upper part of the crane, the crane operator can lift these counterweights back into the working position on the turntable that carries the boom by means of a transfer device. Such implementation devices are known in various versions, for example from German Offenlegungsschrift 36 11 593. The arrangement described there is relatively complex in terms of structure and handling. It is an object of the present invention to provide a simpler and at least equally reliable transfer device. It is then proposed for a transfer device of the type mentioned at the outset to provide the lifting device with a wedge-shaped piston rod head and an axially extendable push pin and to provide a base plate carrying the counterweights with a lifting frame passing through them and the counterweights, the several latch levers for releasably receiving the piston rod head , comprises a spring-loaded plunger which is displaceable by the push pin in the position of the piston rod head between the ratchet levers and a locking bolt on which the plunger rests in its end position and which, when the plunger is lifted off, is enclosed by the two retaining pawls of a locking pliers arranged on the undercarriage, which when the plunger is on Tappet of this is open against spring pressure. This results in a construction which is very inexpensive to manufacture and easy to operate, which moreover requires hardly any maintenance and has a very low susceptibility to malfunction.

In weiterer Ausgestaltung der Erfindung wird empfohlen, daß die Klinkenhebel derart geformt sind, daß sie sich beim Einfahren des Kolbenstangenkopfes durch diesen selbsttätig öffnen, beim Ausfahren jedoch nur, wenn der Schubstift eingefahren ist. Diese Anordnung gewährleistet eine besonders hohe Betriebssicherheit, da bei ausgefahrenem Schubstift ein mechanischer Zwangsverschluß der Klinkenhebel vorliegt.In a further embodiment of the invention, it is recommended that the pawl levers are shaped in such a way that they open automatically when the piston rod head is retracted, but only when the piston rod head is extended when the push pin is retracted. This arrangement ensures a particularly high level of operational safety, since the pawl lever is mechanically positively locked when the push pin is extended.

In der Zeichnung ist ein Ausführungsbeispiel einer erfindungsgemäßen Umsetzvorrichtung dargestellt, und zwar in

  • Fig. 1 in Seitenansicht auf einen Auslegerkran im Fahrzustand, in
  • Fig. 2 in Seitenansicht auf einen Auslegerkran vor dem Umsetzen der Gegengewichte für den Betriebszustand, in
  • Fig. 3 in Seitenansicht vor dem Einfahren des Kolbenstangenkopfes in das Hubgerüst, in
  • Fig. 4 in Seitenansicht bei eingefahrenem Kolbenstangenkopf und geschlossener Verriegelungszange, in
  • Fig. 5 in Seitenansicht bei eingefahrenem Kolbenstangenkopf und geöffneter Verriegelungszange, in
  • Fig. 6 in Draufsicht auf das Hubgerüst und in
  • Fig. 7 im Teilquerschnitt durch die Hubeinrichtung.
In the drawing, an embodiment of a transfer device according to the invention is shown, namely in
  • Fig. 1 in side view of a jib crane in the driving state, in
  • Fig. 2 in side view of a jib crane before the implementation of the counterweights for the operating state, in
  • Fig. 3 in side view before retracting the piston rod head into the mast, in
  • Fig. 4 in side view with the piston rod head retracted and closed locking pliers, in
  • Fig. 5 in side view with the piston rod head retracted and open locking pliers, in
  • Fig. 6 in plan view of the mast and in
  • Fig. 7 in partial cross section through the lifting device.

Die Umsetzvorrichtung ist mit zwei am Drehtisch 1 des Auslegerkrans nebeneinander angeordneten Hubeinrichtungen mit je einem Hubzylinder 2, einer Kolbenstange 3 und einem Kolbenstangenkopf 4 ausgestattet. In der Kolbenstange 2 ist ein kleiner Kolben 5 zum Ausfahren eines Schubstiftes 6 geführt. Auf dem Unterwagen 7 des Auslegerkrans liegt eine Grundplatte 8, auf der ein Hubgerüst 9 befestigt ist. Die Grundplatte 8 dient zur Aufnahme von Gegengewichten 10, die mit Ausnehmungen für das Hubgerüst 9 versehen sind. Am Hubgerüst 9 sind vier Klinkenhebel 11 angelenkt. Außerdem ist in ihm zentral ein Stößel 12 unter dem Druck einer Stößelfeder 13 über einen durch ein Langloch 14 bestimmten Laufweg geführt. In der unteren Endlage des Stößels 12 liegt dieser auf einem am Hubgerüst 9 befestigten Verriegelungsbolzen 15 auf, der bei angehobenem Stößel 12 von zwei Halteklinken 16 einer Verriegelungszange 17 umschlossen wird, die unter der Wirkung einer Druckfeder 18 steht.The transfer device is equipped with two lifting devices arranged side by side on the turntable 1 of the jib crane, each with a lifting cylinder 2, a piston rod 3 and a piston rod head 4. A small piston 5 is guided in the piston rod 2 for extending a push pin 6. On the undercarriage 7 of the jib crane there is a base plate 8 on which a mast 9 is attached. The base plate 8 serves to accommodate counterweights 10, which are provided with recesses for the mast 9. Four pawl levers 11 are articulated on the mast 9. In addition, a plunger 12 is guided centrally under the pressure of a plunger spring 13 over a path determined by an elongated hole 14. In the lower end position of the plunger 12, this rests on a locking bolt 15 fastened to the lifting frame 9, which, when the plunger 12 is raised, is enclosed by two retaining pawls 16 of a locking pliers 17, which is under the action of a compression spring 18.

Im Fahrzustand des Auslegerkrans (Fig. 1) befinden sich die Gegengewichte 10 auf dem Unterwagen 7 hinter dem Fahrerhaus. Sie sind in der für den nächstvorgesehenen Einsatzzweck erforderlichen Anzahl auf die Grundplatte 8 gestapelt worden. Von hier werden sie für den Betriebszustand unter den Drehtisch 1 gehoben (Fig. 2). Dazu sind unter dem Drehtisch 1 zwei Hubeinrichtungen befestigt. Jede Kolbenstange 3 der Hubeinrichtungen wird mittels Öldruck ausgefahren. Die Länge der Kolbenstange 3 ist so bemessen, daß sie einen Bereich im Hubgerüst 9 erreicht, in dem das Ankoppeln und Lösen der Gegengewichte 10 erfolgt. Der runde und nach unten hin stumpfe keilförmige Kolbenstangenkopf 4 der Kolbenstange 3 ist so ausgebildet, daß er beim Erreichen und Hineinfahren in das Hubgerüst 9 die dort sich befindenden drehbar gelagerten Klinkenhebel 11 von der Mittelsenkrechten nach außen drückt (Fig. 3). Beim weiteren Hineinfahren in das Hubgerüst werden die Klinkenhebel 11 durch den Kolbenstangenkopf 4 wieder zur Mitte hin gekippt, dabei legen sie sich fast formschlüssig um den Kolbenstangenkopf 4 und schließen diesen in ihrem mittleren Freiraum ein. Danach wird der Schubstift 6 aus dem Kolbenstangenkopf 4 ausgefahren. Dabei wird ein runder Stößel 12 erreicht. Dieser Stößel 12 wird nun nach unten gedrückt, und zwar so weit, daß er im unteren Teil des Hubgerüstes 9 dessen formschlüssige Verbindung mit dem Unterwagen 7 löst. Das Lösen erfolgt, indem der Stößel 12 auf seinem Weg nach unten zwei Halteklinken 16 einer Verriegelungszange 17 von der Mittelsenkrechten nach außen drückt. Die aufzunehmenden Gegengewichte 10 sind nun vom Unterwagen gelöst. Anschließend erfolgt das Anheben der Gegengewichte 10 durch die hydraulische Hubeinrichtung. Der Kolbenstangenkopf 4 der Hubzylinder 2 ist bei der Stößelendlage gegen eine feste Position gefahren. Diese muß erreicht werden, damit der weitere Ablauf erfolgen kann.In the driving state of the jib crane (Fig. 1), the counterweights 10 are on the undercarriage 7 behind the driver's cab. They have been stacked on the base plate 8 in the number required for the next intended use. From here they are lifted under the turntable 1 for the operating state (Fig. 2). For this purpose, two lifting devices are attached under the turntable 1. Each piston rod 3 of the lifting devices is extended by means of oil pressure. The length of the piston rod 3 is dimensioned such that it reaches an area in the mast 9 in which the counterweights 10 are coupled and released. The round and downward blunt wedge-shaped piston rod head 4 of the piston rod 3 is designed such that when it reaches and drives into the mast 9, it presses the rotatably mounted ratchet lever 11 located there from the center perpendicular (FIG. 3). When moving further into the mast, the Pawl lever 11 is tilted back towards the center by the piston rod head 4, thereby laying almost positively around the piston rod head 4 and enclosing it in its central free space. Then the push pin 6 is moved out of the piston rod head 4. A round plunger 12 is reached. This plunger 12 is now pressed down so far that it releases its positive connection with the undercarriage 7 in the lower part of the mast 9. The release takes place in that the plunger 12, on its way down, presses two holding pawls 16 of a locking pliers 17 from the perpendicular to the outside. The counterweights 10 to be picked up are now detached from the undercarriage. Then the counterweights 10 are lifted by the hydraulic lifting device. The piston rod head 4 of the lifting cylinder 2 has moved against a fixed position in the tappet end position. This must be achieved so that the further process can take place.

Der in die Kolbenstange 3 integrierte kleine einfachwirkende Hydraulikzylinder (Fig. 7) wirkt auf den Schubstift 6 des Kolbenstangenkopfes 4. Wenn jetzt mittels Öldruck der kleine Kolben 5 ausgefahren würde und mit ihm auch der Schubstift 6 des Kolbenstangenkopfes 4, wäre die Länge der Hubeinrichtung ohne Anschlag um diesen Hubweg vergrößert worden. Da aber der Kolbenstangenkopf 4 zusammen mit dem Schubstift 6 gegen diesen festen Anschlag gefahren ist, verändert sich nicht der kleine Kolben 5 in seiner Höhenlage, sondern die Kolbenstange 3 wird gegenüber dem kleinen Kolben 5 nach oben geschoben. Dieser Effekt wird auch später ausgenutzt, um den kleinen Kolben 5 wieder in seine Ausgangslage zurückdrücken zu können. Dann folgt das Anheben der Grundplatte 8 mit Hubgerüst 9 und den darauf gestapelten Gegengewichten 10. Der Öldruck auf der Ringfläche der Gegengewichtshubzylinder bewirkt ein Einfahren der Kolbenstange 3. Der Kolbenstangenkopf 4 mit ausgefahrenem kleinen Kolben 5 bewegt sich nach oben. Die obere schräge Fläche des Kolbenstangenkopfes 4 legt sich in die Schräge der Klinkenhebel 11. Durch diese gegenseitige Anlage möchten sich die Klinkenhebel 11 nach oben öffnen. Sie werden aber in ihrer Öffnungsdrehung durch den Schubstift 6 des Kolbenstangenkopfes 4 daran gehindert. Der untere Teil der Klinkenhebel 11 drückt gegen den Schubstift 6 des Kolbenstangenkopfes 4 und blockiert sie. Der Kolbenstangenkopf 4 ist formschlüssig mit dem Hubgerüst 9 verbunden. Ein Einziehen des kleinen Kolbens 5 ist wegen der einfachwirkenden Funktion nicht möglich. Die Gegengewichte 10 werden in ihre obere Position gehoben. Um ein Absinken zu verhindern, werden Hydrospeicher an die Ringflächen der Zylinder angeschlossen.The small single-acting hydraulic cylinder (Fig. 7) integrated in the piston rod 3 acts on the push pin 6 of the piston rod head 4. If the small piston 5 were now extended by means of oil pressure and with it also the push pin 6 of the piston rod head 4, the length of the lifting device would be without Stop has been increased by this stroke. However, since the piston rod head 4 has moved against this fixed stop together with the push pin 6, the height of the small piston 5 does not change, but the piston rod 3 is pushed upwards relative to the small piston 5. This effect is also used later in order to be able to push the small piston 5 back into its starting position. Then there is the lifting of the base plate 8 with the mast 9 and the counterweights 10 stacked thereon. The oil pressure on the ring surface of the counterweight lifting cylinder causes the piston rod 3 to retract. The piston rod head 4 with the small piston 5 extended moves upward. The upper inclined surface of the piston rod head 4 lies in the incline of the pawl levers 11. By means of this mutual contact, the pawl levers 11 want to open upwards. But they are prevented in their opening rotation by the push pin 6 of the piston rod head 4. The lower part of the pawl lever 11 presses against the push pin 6 of the piston rod head 4 and blocks it. The piston rod head 4 is positively connected to the mast 9. Retracting the small piston 5 is not possible because of the single-acting function. The counterweights 10 are raised to their upper position. In order to prevent sinking, hydraulic accumulators are connected to the ring surfaces of the cylinders.

Das Ablegen der Gegengewichte 10 auf dem Unterwagen erfolgt entsprechend. Der Öldruck auf der Kolbenseite der Hubzylinder 2 bewirkt ein Ausfahren der Kolbenstangen 3. Hubgerüst 9 mit Grundplatte 8 und Gegengewicht 10 werden mittels Führungen auf dem Unterwagen in ihre richtige Lage gebracht. Die beiden Halteklinken 16 jeder Verriegelungszange 17 auf jeder Seite im Unterwagen werden beim Aufsetzen des Hubgerüstes 9 auf den Unterwagen 7 durch den Verriegelungsbolzen 15 im Hubgerüst 9 zur Seite gedrückt (Fig. 5). Die Ausbildung der oberen Flächen der Halteklinken 16 bewirkt dieses Spreizen gegen die Druckfeder 18 jenseits der Lagerung. Die Halteklinken 16 bewegen sich nach dem Prinzip der Gegenschere. Wenn also der Stößel 12 nach dem Abschalten des ihn niederhaltenden Hydraulikdrukkes unter der Wirkung der Stößelfeder 13 zum Lösen des Kolbenstangenkopfes 4 nach oben gleitet, gibt er den Raum oberhalb des Verriegelungsbolzens 15 frei. Die Halteklinken 16 der Verriegelungszangen 17 können in ihre geschlossene Position um den Verriegelungsbolzen 15 greifen. Das Lösen der Klinkenhebel 11 vom Kolbenstangenkopf 4 erfolgt entsprechend der oben beschriebenen Verriegelung. Bevor die Halteklinken 16 in ihre Verriegelungspositionen greifen, befindet sich der Stößel 12 auf dem Verriegelungsbolzen 15 in seiner Endlage. Der kleine Kolben 5 im Kolbenstangenkopf 4 ist noch ausgefahren. Wenn jetzt durch den Druck im Kolbenraum des Hubzylinders 2 der Kolbenstangenkopf 4 die Endlage des Stößels 12 erreicht, wird durch die Kraft der Kolbenstange 3 und die Stößelfeder 13 der kleine Kolben 5 im Kolbenstangenkopf wieder eingefahren. Durch das Eindrü ken des Schubstiftes 6 des Kolbenstangenkopfes 4 können sich die Klinkenhebel 11 beim Hochfahren des Kolbenstangenkopfes 4 wieder frei bewegen. Der Hubzylinder 2 kann den Kolbenstangenkopf 4 aus dieser Verbindung nach oben in die obere Endlage ziehen. Das abgelegte Hubgerüst 9 mit Grundplatte 8 ist mit dem Unterwagen 7 formschlüssig verbunden.The counterweights 10 are placed on the undercarriage accordingly. The oil pressure on the piston side of the lifting cylinder 2 causes the piston rods 3 to extend. The lifting frame 9 with the base plate 8 and counterweight 10 are brought into their correct position by means of guides on the undercarriage. The two retaining pawls 16 of each locking pliers 17 on each side in the undercarriage are pressed aside when the lifting frame 9 is placed on the undercarriage 7 by the locking bolt 15 in the lifting frame 9 (FIG. 5). The formation of the upper surfaces of the pawls 16 causes this spreading against the compression spring 18 beyond the storage. The holding pawls 16 move on the principle of counter shears. Thus, if the plunger 12 slides upward after the hydraulic pressure holding it down under the action of the plunger spring 13 to release the piston rod head 4, it releases the space above the locking bolt 15. The holding pawls 16 of the locking pliers 17 can reach around the locking bolt 15 in their closed position. The release of the pawl lever 11 from the piston rod head 4 takes place in accordance with the locking described above. Before the holding pawls 16 reach into their locking positions, the plunger 12 is on the locking bolt 15 in its end position. The small piston 5 in the piston rod head 4 is still extended. If the piston rod head 4 now reaches the end position of the plunger 12 due to the pressure in the piston chamber of the lifting cylinder 2, the force of the piston rod 3 and the plunger spring 13 causes the small piston 5 in the piston rod head to be retracted again. By pushing the push pin 6 of the piston rod head 4, the pawl levers 11 can move freely again when the piston rod head 4 is raised. The lifting cylinder 2 can pull the piston rod head 4 upwards out of this connection into the upper end position. The stored mast 9 with base plate 8 is positively connected to the undercarriage 7.

Claims (2)

1. Umsetzvorrichtung für Gegengewichte an Auslegerkranen, insbesondere Mobilteleskopkranen, mit drehbarem Oberwagen und mindestens einer an diesem angeordneten senkrecht wirkenden hydraulischen Hubeinrichtung zum An- und Abkuppeln sowie Anheben und Absetzen der Gegengewichte, dadurch gekennzeichnet, daß die Hubeinrichtung einen keilförmigen Kolbenstangenkopf (4) und einen aus diesem achsial ausfahrbaren Schubstift (6) aufweist und daß eine die Gegengewichte (10) tragende Grundplatte (8) mit einem sie und die Gegengewichte (10) durchsetzenden Hubgerüst (9) vorgesehen ist, das mehrere Klinkenhebel (11) zur lösbaren Aufnahme des Kolbenstangenkopfes (4), einen in der Lage des Kolbenstangenkopfes (4) zwischen den Klinkenhebeln (11) durch den Schubstift (6) verschiebbaren gefederten Stößel (12) und einen querliegenden Verriegelungsbolzen (15) umfaßt, auf dem der Stößel (12) in seiner Endlage aufliegt und der bei abgehobenem Stößel (12) von den beiden Halteklinken (16) einer am Unterwagen (7) angeordneten Verriegelungszange (17) umschlossen ist, die bei aufliegendem Stößel (12) von diesem gegen Federdruck geöffnet ist.1. Transfer device for counterweights on jib cranes, in particular mobile telescopic cranes, with a rotatable superstructure and at least one vertically acting hydraulic lifting device arranged thereon for coupling and uncoupling as well as lifting and lowering the counterweights, characterized in that the lifting device has a wedge-shaped piston rod head (4) and one from this axially extendable push pin (6) and that the counterweights (10) supporting base plate (8) with one and the counter Weights (10) penetrating mast (9) is provided, the several pawl levers (11) for releasably receiving the piston rod head (4), one in the position of the piston rod head (4) between the pawl levers (11) by the push pin (6) slidable Plunger (12) and a transverse locking bolt (15) on which the plunger (12) rests in its end position and which, when the plunger (12) is lifted, from the two holding pawls (16) of a locking pliers (17) arranged on the undercarriage (7). is enclosed, which is open against the spring pressure when the tappet (12) rests on it. 2. Umsetzvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Klinkenhebel (11) derart geformt sind, daß sie sich beim Einfahren des Kolbenstangenkopfes (4) durch diesen selbttätig öffnen, beim Ausfahren jedoch nur, wenn der Schubstift (6) eingefahren ist.2. Transfer device according to claim 1, characterized in that the pawl levers (11) are shaped such that they open automatically when the piston rod head (4) is retracted by the latter, but only when it is extended when the push pin (6) is retracted.
EP93117550A 1992-11-07 1993-10-29 Transfer device Expired - Lifetime EP0597334B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4237647A DE4237647A1 (en) 1992-11-07 1992-11-07 Transfer device
DE4237647 1992-11-07

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EP0597334A1 true EP0597334A1 (en) 1994-05-18
EP0597334B1 EP0597334B1 (en) 1997-05-07

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EP93117550A Expired - Lifetime EP0597334B1 (en) 1992-11-07 1993-10-29 Transfer device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112320637A (en) * 2020-11-11 2021-02-05 三一汽车起重机械有限公司 Lifting appliance structure, balancing weight device and crane

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106946151B (en) * 2017-03-16 2018-05-25 昆明理工大学 A kind of hydraulic clamp

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537829A (en) * 1947-02-14 1951-01-09 Hohler Robert Lee Releasable coupling
EP0311082A1 (en) * 1987-10-09 1989-04-12 Hitachi Construction Machinery Co., Ltd. Full-turn type working machine
DE3912868C1 (en) * 1989-02-20 1990-08-16 Liebherr Werk Ehingen Mobile crane ballast system - uses clamps, actuator cylinders and locking systems to move ballast plates from swung-out position to transit position
EP0524402A1 (en) * 1991-07-20 1993-01-27 FAUN GmbH Crane truck
FR2679893A1 (en) * 1991-08-01 1993-02-05 Ppm Mobile crane including a turret fitted with a removable counterweight

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013228C1 (en) * 1990-04-26 1991-06-27 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537829A (en) * 1947-02-14 1951-01-09 Hohler Robert Lee Releasable coupling
EP0311082A1 (en) * 1987-10-09 1989-04-12 Hitachi Construction Machinery Co., Ltd. Full-turn type working machine
DE3912868C1 (en) * 1989-02-20 1990-08-16 Liebherr Werk Ehingen Mobile crane ballast system - uses clamps, actuator cylinders and locking systems to move ballast plates from swung-out position to transit position
EP0524402A1 (en) * 1991-07-20 1993-01-27 FAUN GmbH Crane truck
FR2679893A1 (en) * 1991-08-01 1993-02-05 Ppm Mobile crane including a turret fitted with a removable counterweight

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112320637A (en) * 2020-11-11 2021-02-05 三一汽车起重机械有限公司 Lifting appliance structure, balancing weight device and crane

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EP0597334B1 (en) 1997-05-07
DE4237647A1 (en) 1994-05-11
DE59306388D1 (en) 1997-06-12

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