DD234260A1

DD234260A1 - LIFTING DEVICE FOR COMPLEMENTARY WEIGHTS ON BOOMS

Info

Publication number: DD234260A1
Application number: DD27281885A
Authority: DD
Inventors: Joachim Bryx; Heinrich Neugebauer; Dietmar Hillner
Original assignee: Eisengiesserei U Maschinenfabr
Priority date: 1985-01-29
Filing date: 1985-01-29
Publication date: 1986-03-26

Abstract

Die Erfindung betrifft eine Hubvorrichtung fuer Zusatzgegengewichte an Auslegerkranen mit Auto- Mobil- und Raupenunterwagen, die zur Erhoehung der Tragfaehigkeit und des Lastmomentes Zusatzgegengewichte aufweisen, die auf Raedern oder Rollen fahrbar und mit dem Kranoberwagen gelenkig verbunden sind. Mit der Hubvorrichtung soll ein ganz bestimmter Standmomentanteil des Kranes in Abhaengigkeit der Auslegerhalteseilkraft auf das Zusatzgegengewicht uebertragen werden. Erfindungsgemaess wird das dadurch geloest, dass zur Auslegerverstellung eine flaschenzugaehnliche Seilfuehrung des Auslegerhalteseiles nach Figur 2 auch so ueber Seilrollen am Zusatzgegengewicht gefuehrt wird, dass in Abhaengigkeit der Seilstraenge ein bestimmter Anteil der Auslegerhalteseilbelastung auf das Zusatzgegengewicht im Hubsinne wirkt. Fig. 2The invention relates to a lifting device for additional counterweights on boom cranes with car and track undercarriage, which have to increase the Tragfaehigkeit and the load torque additional counterweights that are mobile on wheels or wheels and articulated to the crane superstructure. With the lifting device, a very specific proportion of stall torque of the crane is to be transferred to the additional counterweight as a function of the boom holding rope force. According to the invention, this is achieved by the fact that, for boom adjustment, a bottle-like rope guide of the boom holding rope according to FIG. 2 is also guided by pulleys on the additional counterweight, such that a certain proportion of the boom holding rope load acts on the additional counterweight in the stroke direction as a function of the rope line. Fig. 2

Description

Beim Kranbetrieb oder beim Aufrichten bzw. Verstellen des Auslegers mittels der Auslegerwinde wird ein dem Verhältnis der Seilsträngigkeit entsprechender Anteil der Auslegerhalteseilkraft auf das Zusatzgegengewicht übertragen, ohne daß dies vom Boden abhebt. Dieser Kraftanteil in Verbindung mit dem Abstand des Schwerpunktes des Zusatzgegengewichtes bis zur Kippkante des Auslegerkranes begründet den Standmomentanteil, der durch das Zusatzgegengewicht aufgebracht wird.When crane operation or when erecting or adjusting the boom by means of the boom winds a proportion of Seilsträngigkeit corresponding proportion of Auslegerhalteseilkraft transmitted to the additional counterweight, without this lifts off the ground. This share of force in conjunction with the distance of the center of gravity of the additional counterweight to the tilting edge of the jib crane justifies the stall torque component, which is applied by the additional counterweight.

embodiment

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail below using an exemplary embodiment.

In den dazugehörigen Zeichnungen zeigen:In the accompanying drawings show:

Fig. 1: Seitenansicht eines Auslegerkranes mit ZusatzgegengewichtFig. 1: side view of a boom crane with additional counterweight

Fig.2: Schematische Darstellung derflaschenzugähnlichen Seilführung des Auslegerhalteseiles Die Hubvorrichtung besteht in ihrem Grundaufbau aus der Auslegerwinde 1 des Auslegerkranes, den Seilrollen 2 auf der Kopfachse des Stützbockes oder Gegengewichtsausleger, den Seilrollen 3 derTraverse des Auslegerhalteseiles, den Seilrollen 4 am Zusatzgegengewicht 5 sowie dem Ausiegerhalteseil 6 und ist im hinteren Bereich des nicht näher beschriebenen Auslegerkranes mit Raupenfahrwerk angeordnet.The lifting device consists in its basic structure of the jib 1 of the jib crane, the pulleys 2 on the head of the support bracket or counterweight jib, the pulleys 3 of the boom holding rope, the pulleys 4 on the additional counterweight 5 and the Auswerferhalteseil 6 and is arranged in the rear region of the unspecified boom crane with crawler track.

Die Seilführung des Auslegerhalteseiles 6 ist entsprechend der Seilzugkraft der Auslegerwinde 1 und der maximalen Auslegerhalteseilkraft aus den ungünstigsten Betriebs- oder Montagebedingungen des Auslegerkranes hinsichtlich der Anzahl der Seilstränge ausgeführt. Im Ausführungsbeispiel nach Figur 2 ist diese Seilscherung zehnfach ausgeführt.The cable guide of Auslegerhalteseiles 6 is performed according to the cable pulling force of the boom and the maximum 1 Auslegerhalteseilkraft from the worst operating or mounting conditions of the jib crane in terms of the number of cable strands. In the embodiment of Figure 2, this rope shear is executed ten times.

Gleichzeitig ist das Auslegerhalteseil 6 von den Seilrollen 2 der Kopfachse des Stützbockes oder Gegengewichtsauslegers in einer bestimmten Strängigkeit über die Seilrollen 4 am Zusatzgegengewicht 5 geführt. Im Ausführungsbeispiel nach Figur 2 ist diese Seilscherung sechsfach ausgeführt. Mit dieser Strängigkeit ist der Anteil der Hubkraft auf das Zusatzgegengewicht 6 in Abhängigkeit der Auslegerhalteseilkraft festgelegt.At the same time the boom holding cable 6 is guided by the pulleys 2 of the head axis of the support bracket or counterweight boom in a certain strandedness on the pulleys 4 on the additional counterweight 5. In the embodiment of Figure 2, this rope shearing is performed six times. With this stranding, the proportion of the lifting force on the additional counterweight 6 is determined as a function of Auslegerhalteseilkraft.

Sowohl bei Veränderung der Auslegerneigung durch Betätigen der Auslegerwinde 1, als auch beim Kranbetrieb ohne Veränderung der Auslegerneigung ist durch die Art der Hubvorrichtung in unterschiedlicher Seilsträngigkeit zwischen einerseits der Kopfachse des Stützbockes oder Gegengewichtsauslegers und der Traverse des Auslegerhalteseiles und andererseits der Kopfachse des Stützbockes oder Gegengewichtsauslegers und dem Zusatzgegengewicht 5 gewährleistet, daß für das Standmoment des Auslegerkranes ein in Abhängigkeit der Auslegerhalteseilkraft eindeutig festgelegter Standmomentanteil durch das Zusatzgegengewicht 5 aufgbracht wird.Both when changing the Auslegeanigung by pressing the boom windlass 1, as well as crane operation without changing the Auslegerneigung is due to the nature of the lifting device in different Seilesträngigkeit between on the one hand the head of the support bracket or counterweight boom and the traverse of Auslegerhalteseiles and on the other hand, the head of the Stützbockes or counterweight jib and Ensures the additional counterweight 5, that for the stationary torque of the jib crane in accordance with the Auslegerhalteseilkraft uniquely determined stall torque component is added by the additional counterweight 5.

Claims

Invention claim:

1. lifting device for additional counterweights on boom cranes, preferably with car, mobile or crawler undercarriage, which are arranged movably mounted on wheels or rollers and hinged to the crane top, characterized in that the participation of the additional counterweight (5) at the moment stand of the jib crane a flaschenzugähnliche Guide the Auslegerhalteseiles (6) on pulleys in the Auslegerhalteseiltraverse (3) on the head of the support bracket or counterweight boom (2) and the additional counterweight (4) is provided.

2. Lifting device according to item 1, characterized in that for transmitting a certain proportion of Auslegerhalteseilkraft on the additional counterweight (5), the number of cable strands of the pulleys on the head of the support bracket or counterweight jib (2) to the pulleys on the additional counterweight (4 ) is set.

For this 2 pages drawings

Field of application of the invention

The invention relates to a lifting device for additional counterweights of jib cranes, which are movable with car, mobile and crawler undercarriage, the additional counterweights are even equipped with trolleys and articulated mounted on the superstructure of the jib cranes.

Characteristic of the known technical solutions

It is known that to increase the carrying capacity and the load torque of jib cranes additional counterweights are used, which are connected by guy ropes with the rocker counterbalance arms of the cranes, where the guy ropes are biased by the inclination change of the counterweight boom, that a portion of the additional counterweight at stall torque the crane is secured.

It is further known that the counterweights are connected to the luffing wings or jibs of the tower or derrick crane equipment by guy ropes which are also biased by inclination change.

The known solutions are not suitable to transfer a very specific proportion of the necessary static moment on the additional counterweight. The prestressing of the guy ropes is not an accurate method for the participation of additional counterweights at stall torque even when installing force measuring devices by the elastic behavior of the entire boom-cable system of a jib crane. These solutions also require for the rocker of the counterweight boom for biasing the guy ropes an additional winch and all associated facilities for the necessary rope operation.

One of many boom cranes known rigid support bracket can not be used to accommodate the additional weight in these solutions.

After the Auslegeschrift 195 037

3 DE (B 66 C 23/74) is a boom crane on crawler track with additional counterweight described in which the additional counterweight is connected via guy ropes with the tip of the counter jib and the guy ropes are biased by the tilt adjustment of the jib. This arrangement does not guarantee a predictable share of the stall torque of the crane relative to the additional counterweight.

Further, from the published patent application DE 283 966 5 (B 66 C 23/76) a device for a needle-derrick crane is known in which the additional counterweight raised by adjusting a Nadelgegenauslegers, which is arranged on the Standmastspitze over tensioning cables and in a floating Position is brought.

With the arrangement, although a smooth turning is possible, but based on indifferent balance and causes complicated conditions.

For jib cranes with very high load capacity are proposed in the published patent applications DE 321 586 (B 66 C 23/62) and DE 332 685 0 (B 66 C 23/76) devices in which the additional counterweights arranged on separate crawler and over linkage with the Jib crane are connected, the caterpillars have winches that take over the bias with the tips of the counter-jib.

Again, the stance moment shares of both main properties are not fixed.

Furthermore, according to the published patent applications DE 281 454 0 (B 66 C 23/74) and DE 234 015

4 (B 66 C 23/74) devices are known in which the additional counterweights guided on air bags and used on special controls when turning and driving in a floating position, the connection from the additional counterweight to the tip of the counter jib on prestressed guy ropes with the known disadvantages he follows.

Object of the invention

The aim of the invention is to provide a lifting device for additional counterweights of jib cranes, with which a precisely predictable stall torque component is assigned depending on the Auslegerhalteseilkraft the additional counterweight and thereby eliminates the tilting counterweight boom.

Explanation of the essence of the invention

The invention has for its object to develop a lifting device for additional counterweights on boom cranes, preferably with car, mobile and crawler undercarriage, which are arranged movably mounted on wheels or rollers and hinged to the crane top, the lifting device on counterweight boom or trestles one transmits certain portion of the necessary stationary torque of the jib crane to the additional counterweight.

According to the invention, this object is achieved in that the participation of the additional counterweight at stall moment of the jib crane a bottle-pull similar leadership of Auslegerhaiceseiles on pulleys in the Auswerhalteseiltraverse, is provided on the head of the support bracket or counterweight jib and the additional counterweight.

The number of rope cords of the pulley-like guide of the boom holding rope between the pulleys in the boom stabilizer cross-beam and those on the head pivot or counterweight boom is in a predetermined ratio to the number of cords between the pulleys on the crosstie of the cradle or counterweight and other counterweight.