DE202005016743U1

DE202005016743U1 - Crane comprises a bracing device having two brace supports hinged on an auxiliary boom and inclined opposite a rocker surface

Info

Publication number: DE202005016743U1
Application number: DE202005016743U
Authority: DE
Original assignee: Liebherr Werk Ehingen GmbH
Current assignee: Liebherr Werk Ehingen GmbH
Priority date: 2005-10-25
Filing date: 2005-10-25
Publication date: 2007-03-29
Anticipated expiration: 2015-10-26

Abstract

crane with a turntable around a lying rocking axle tiltable hinged outrigger consisting of a telescopic main boom and a connectable with this Auxiliary boom and with a guying device for bracing the Jib, wherein the guying two opposite the Has rocker plane of the boom inclined, preferably approximately V-shaped expandable guy supports, the above Tie down means are connectable to the boom, characterized that the Guying fixture additionally has two anchoring on the jib anchored, which also across from the rocker plane of the boom are inclined and preferably V-shaped spreadable are.

Description

The The present invention relates to a crane, preferably a mobile crane, with one on a revolving stage consisting of a horizontal rocker axis tiltable articulated arm from a telescopic main boom and a connectable with this Auxiliary boom and with a guying device for bracing the Jib, wherein the guying two opposite the Rocker plane of the boom inclined, preferably expandable approximately V-shaped guy supports that has over Tie down means are connectable to the boom.
In order to achieve greater loads in cranes, especially telescopic vehicle cranes despite ever longer boom, boom braces are used in which guy ropes are guided by the boom tip or a collar of the telescopic boom shots on guy supports, which are intercepted in the base of the boom. To be able to intercept not only the forces acting in the rocker plane by an attached load or the weight of the boom, but also lateral forces across the rocker plane, has already been proposed to form such bracing spatially, that is to arrange the leadvases V-shaped spread, so that from the tension ropes can also intercept such lateral forces on the boom, as z. B. the EP 1 215 161 A1 or the EP 1 065 166 A1 shows. The guy supports sit in these solutions regularly on the top of the pivoting portion of the telescopic boom in the region of the collar. In this case, the guy supports can be brought out of the spread-open working position in a folded to the boom transport position for the purpose of transport. For this purpose, hydraulic piston-cylinder assemblies can be used regularly, which are hinged on the one hand to the guy supports and on the other hand on the Auslegeranlenkschuss.
Especially When used for the installation of wind turbines are mobile cranes in use, the telescopic boom on this attachable jib renewable are. The jibs usually consist of juxtaposed Grid spacers, which are placed on the telescopic boom.
It Vehicle cranes with telescopic arms are already known to which a rocker luffing jib is articulated. This one will usually over so-called A-bucks guyed. The installation of such a crane on a Wippspitze serving jib is quite cumbersome, since the angle change the luffing tip is done by means of ropes, the elaborate reeved Need to become.
task The present invention is a crane of the generic type in such a way that it can be easily mounted on the one hand and on the other hand has a high stability even with large boom lengths.
According to the invention this Problem solved by the features of claim 1. Accordingly, the crane points one at a revolving stage on a lying rocking axis tiltable hinged outrigger, the from a telescopic main boom and a connectable with this Jib exists. Furthermore, the crane has a guying device for bracing the boom, wherein the guying device two across from the rocker plane of the boom inclined, preferably about V-shaped expandable guy supports that has over Tie down means are connectable to the boom. According to the invention the guying device of the crane additionally two at the jib hinged guy supports on, also opposite the rocker plane of the boom are inclined and are preferably V-shaped spreadable. advantage this additional guy supports At the jib it is that thereby the stability of the very long boom is further improved. For another, such a built crane but are mounted much faster than a comparable crane with A-goats, since the shearing of Verstellseile deleted. The guy supports can be very simply with the appropriate guy from their folded Transport position spent in the erected working position become.
advantageous Embodiments of the invention will become apparent from the main claim subsequent Dependent claims.
According to one preferred embodiment of the invention, the boom by means a rocker cylinder, on the one hand on the boom and on the other the revolving stage is articulated, up and down rocking.
The additional Anchor supports hinged on the jib are advantageously designed as pressure arms, At the upper ends attack guy ropes.
The on the pressure arms attacking guy ropes are in accordance with a Another embodiment of the invention on guy winds, in turn at the guy supports of the main boom are arranged, windable.
Since the additional guy supports can be articulated via two spatially inclined axes on the jib, by which they can be pivoted from the transport position to the working position, these additional guy supports can over wrap the guy wires connected to them on the corresponding guy winches are erected in a very simple manner.
A Another advantageous embodiment of the invention relates to at the top of the jib a spur is arranged, which has guying means is connected to the jib arranged on the jib. such Tie down means can Be guy ropes or guy rods. This spur causes a additional Lever arm with respect the boom longitudinal axis, so that the moment acting on the boom from the top and the attached to it Load is partially compensated.
At the front end of the jib can in particularly advantageous Way be arranged a rocker luffing jib. This can over a pull tab or advantageously via a hydraulic piston-cylinder arrangement be rocking.
The guy supports can be stored so that they are in their inclination towards the Rocker plane of the boom changeable are.
The guy supports can advantageous for different Pivoting positions of the guy supports across from a level perpendicular to the rocker plane of the boom in different Angular positions opposite be brought to the said rocker plane, in particular such that in a swung back Clamping position for flat boom rocker positions the guy supports a smaller spread angle between them than in steeper guy positions for steeper boom swing positions.
The on the telescopic boom arranged guy supports can so be pivotally mounted, that they from a V-shaped spread operating position in a tiltered boom about parallel assembly and / or Transport position are pivotable.
there can the guy supports each inclined at an acute angle to the rocker plane of the boom Swivel axis to be swiveled.
Advantageous can the guy supports also variable in length, in particular telescopic, be formed.
According to one Further development of the invention may include a synchronizer provided for the synchronization of the adjustment of the guy means be. So on both sides the respective pitch of the Guy rope. When tensioning the boom bracing, the two winches wound up until the same rope length results on both sides Has. Thus, the boom, even with pre-deformation due to wind, laterally Solar radiation or inclination of the Cranes pulled into its exact straight position. This in turn allows the Recording significantly higher Loads.
The arranged on the telescopic boom Abspannstützen can pivot about guy cylinder be.
Further Features, details and advantages of the invention will become apparent a preferred embodiment shown in the drawing explained in more detail. In the drawings show:
1 FIG. 2 is a schematic plan view of a jib with jib according to an embodiment of the present invention and FIG
2 a side view of the boom according to 1 ,
The boom shown in the figures 10 is part of a vehicle crane, which is not shown here in detail and in the usual way has a trained as a truck undercarriage on which a revolving stage is rotatably mounted about an upright axis. At the turntable is the boom 10 , as shown here, around a lying rocking axis 12 up and down rocking. This purpose is served in the figures also not shown Wippzylinder ger on the one hand on Ausle 10 and on the other hand hinged to the turntable, also not shown here.
The boom 10 consists of a telescopic main boom 14 and from a attached to this jib 16 , The jib 16 is by three interconnected lattice masts 18 . 20 and 22 educated.
The front end of the main telescopic boom 14 is about an intermediate piece 24 with the lattice mast 18 of the jib 16 connected. In the 1 as well as in the 2 is the main boom 14 shown with austeleskopierten telescopic shots.
As in 2 is shown at the top of the jib 16 a luffing luffing jib 24 articulated and via a piston-cylinder arrangement 26 luffing. Through this luffing luffing jib 24 In particular, when mounting wind turbines a sensitive change of the radius may be possible without the entire boom 10 would have to be adjusted.
In the 1 and 2 is with 30 the total te guying device for bracing the boom 10 designated. This guying device consists initially of the two with respect to the rocker plane of the boom inclined, preferably about V-shaped expandable guy supports 32 that have guying means 34 with the main boom 14 are connectable. The anchoring means 34 are guy cables in the embodiment shown here. Furthermore, in the embodiment shown here is the 1 and 2 the respective guy support 32 with the pivoting joint 15 of the main telescopic boom 14 connected. The construction of such V-shaped expandable guy supports 34 is already in the EP 1 215 161 A1 or in the EP 1 065 166 A1 described.
At the guy supports 32 are winds 36 arranged on which guy ropes 38 be wound up. These guy ropes 38 are with the outer ends of other guy supports 40 connected. The guy supports 40 are about two spatially inclined axes on the jib 16 hinged. Also these guy supports 40 , Which are designed as pressure arms, are spread in their working position V-shaped, as shown in the 1 and 2 evident. They are, in a manner not shown here, in a transport position to the jib 16 folded and are by winding the guy ropes 38 on the winds 36 from the folded transport position in the V-shaped spread working position, as here in the 1 and 2 is shown, pivoted. In the working position are the outer ends of the guy supports 40 continue on guy ropes 42 each with a spur 44 connected, each side front 44 are formed at the front end of the jib, as can be seen from the 1 respectively. 2 results. This spur 44 each causes an additional lever arm with respect to the boom longitudinal axis, so that the moment is partially compensated for on the boom of the luffing luffing jib and the load attached thereto.
The winds 36 are provided with drives that are able to coil up or down even with the maximum permissible cable pull. You can continue on both sides of the rope length of the guy ropes 38 to capture. When tensioning the boom bracing, the two winches 36 as long as wound up until the same rope length has resulted on both sides. This will be the boom supports 40 also drawn in pre-deformation due to wind, lateral sunlight or tilting of the crane in an exact straight position. As a result, significantly higher loads are possible.
Another advantage of this invention bracing 30 is that the boom is stabilized both in the boom and transverse to the boom by this additional bracing and consequently significantly higher loads can be achieved.

Claims

Crane with a tiltable articulated to a revolving platform about a lying rocking axis boom comprising a telescopic main boom and a connectable with this jib and with a guy for bracing the boom, wherein the guying two opposite the rocker plane of the boom inclined, preferably approximately V-shaped spreadable Having guy supports, which can be connected via anchoring means with the boom, characterized in that the guying device additionally has two anchored on the jib anchoring supports, which are also inclined relative to the rocker plane of the boom and are preferably V-shaped spreadable.
Crane according to claim 1, characterized in that the boom by means of at least one luffing cylinder, on the one hand on the boom and on the other hand, on the revolving stage is articulated, up and down rocking.
Crane according to one of the preceding claims, characterized characterized in that additional on Auxiliary arm articulated guy supports designed as a pressure arm are at the upper ends attack guy ropes.
Crane according to claim 3, characterized in that the the suspension arms attacking guy ropes on guy winches, the at the guy supports of the main boom are arranged, are wound up.
Crane according to one of the preceding claims, characterized characterized in that additional guy supports over two spatial inclined axles are articulated on the jib to which they are from the transport position are pivotable in the working position.
Crane according to one of the preceding claims, characterized characterized in that At the top of the jib a spur is arranged, which has guying means is connected to the jib arranged on the jib.
Crane according to claim 6, characterized in that the tensioning means Guy ropes or guy rods are.
Crane according to one of the preceding claims, characterized in that the tensioning supports arranged on the auxiliary boom are folded in their transport position onto the auxiliary boom are.
Crane according to claim 8, characterized in that the the auxiliary boom arranged guy supports by winding the guy ropes on the guy winches from their transport position in their spatially spanned Working position are swiveled.
Crane according to one of the preceding claims, characterized characterized in that front end of the jib arranged a tilting luffing jib is.
Crane according to claim 10, characterized in that the luffing jib has a boom Pull tab or over a hydraulic piston-cylinder arrangement is tiltable.
Crane according to one of the preceding claims, characterized characterized in that guy supports are stored so that they in their inclination the rocker plane of the boom changeable are.
Crane according to one of the preceding claims, characterized characterized in that guy supports for different Pivoting positions of the guy supports across from a plane perpendicular to the rocker plane of the boom in different angular positions across from said rocker plane can be brought, in particular such that in a zurückgeschwenkten Clamping position for flat boom rocker positions the guy supports a smaller spread angle to include between themselves in steeper bracing positions for steeper boom swing positions.
Crane according to one of the preceding claims, characterized characterized in that on the telescopic boom arranged guy supports such are pivotally mounted that they from a V-shaped spread operating position in a tiltered boom about parallel assembly and / or Transport position are pivotable.
Crane according to one of the preceding claims, characterized characterized in that guy supports each inclined at an acute angle to the rocker plane of the boom Swivel axis are pivotable.
Crane according to one of the preceding claims, characterized characterized in that guy supports variable in length, in particular telescopic, are formed.
Crane according to one of the preceding claims, characterized characterized in that a Synchronizer for synchronization of the adjustment of Abspannmittel is provided. Crane after one of the previous ones Claims, characterized in that guy cylinder provided for pivoting the arranged on the telescopic boom Abspannstützen are.