The within invention concerns a vehicle crane with a telescoping boom that can luff on a horizontal axle and rotate on an upright axle, with a pivot section, telescoping sections that can telescope out of the pivot section, and two anchor supports housed flexibly on one of the sections, so that they can pivot out of transportation position, in which they are folded against the section essentially parallel to each other, into an upright operating position, particularly a V-shaped position. The invention also concerns a process for assembling and disassembling said anchor supports of the telescoping boom of the vehicle crane.
Telescoping booms of said type are regularly pivoted on the superstructure of the vehicle crane and can luff on a luffing cylinder jointed to the superstructure. The anchor supports are usually pivoted on the back of the telescoping boom in the upper portion of a pivot section, and are customarily mounted by means of hydraulic cylinders. The anchor supports can be anchored by means of cables or rods against the head of the inner telescoping section or a collar of the upper telescopic section as well as against the superstructure or the lower portion of the pivot section. For example, a crane boom known from DE-Gbm 1 751 383 is equipped with anchor supports positioned in a V shape symmetrical to its horizontal and vertical central plane, over which said anchor sections anchor components run to the top and bottom of the boom. The anchor supports can pivot on two axles, so that they can be folded out of their V-shaped operating position and against the pivot section for purposes of transportation. However, under certain circumstances this is not sufficient to permit the vehicle crane to travel through the streets. To meet the axle load regulations established by law, the telescoping bracing must be removed when necessary and loaded onto a low-bed trailer that travels with the vehicle crane. In vehicle cranes of the usual type, an additional auxiliary crane is necessary to lift the telescoping bracing off the vehicle crane and load it onto the low-bed trailer.
It is therefore the task of the within invention to create an improved vehicle crane as well as an improved process for assembling the anchor supports of the type initially described, to eliminate the disadvantages of the state of the art and perfect said state of the art in an advantageous manner. Preferably, a rapid and simple assembly or disassembly of the telescoping bracing should be achieved without an auxiliary crane.
According to the invention, this task is performed by means of a vehicle crane according to the description herein. With respect to the process, said task is performed by means of a process according to the description herein. Preferred embodiments of the invention are set forth herein.
According to the invention, for disassembly purposes the anchor supports are first deposited, with telescoping boom in lowered position, on brackets positioned next to the telescoping boom or on comparable surfaces, and are detached from the telescoping boom. The boom is then raised without the anchor supports. The anchor supports are then picked up by the telescoping boom itself from their intermediate position on the brackets, are lifted, and are loaded onto a low-bed trailer or similar equipment. For purposes of assembly, the sequence of steps can be reversed: The anchor supports are first picked up by the telescoping boom on which they are to be mounted and are laid on the brackets in pre-determined position and direction. The telescoping boom is then lowered so that it comes to rest between the anchor supports lying on the brackets. The anchor supports are then mounted on the boom. Needless to say, the predetermined anchor support position and the direction in which the anchor supports are initially positioned on the brackets are advantageously selected in such manner that the anchor supports with their boom connection components rest directly opposite the pertinent boom connection when the boom is lowered in the subsequent step.
By means of self-assembly of the anchor supports with the help of the telescoping boom itself, the telescopic bracing can be assembled and disassembled without a separate auxiliary crane. The said auxiliary crane thus does not have to be brought along.
The brackets or resting places for the anchor supports are appropriately positioned on the flat truck of the vehicle crane to the right and left next to the boom, when the boom is positioned lengthwise on the vehicle. Preferably the anchor supports are deposited on the brackets essentially horizontally and parallel to one another. In their transportation position, folded against the pivot section, they travel disassembled from the boom or assembled on the boom and folded against the pivot section.
To deposit the anchor supports for assembly in the correct position and direction on the brackets, positioning components can be provided on the brackets for the anchor supports, which said positioning components bring the anchor supports into the desired predetermined erection position when they are placed on the brackets. They can be, for example, positioning components that center and/or permit positive-locking deposit in only one position.
Advantageously, the anchor supports can be pivoted on at least one pivot axle relative to the boom sections to which they are attached, so that they can be erected and in particular spread apart to from a V shape. Pressure cylinders can regularly be assigned to the anchor supports to pivot the anchor supports appropriately. To facilitate assembly and disassembly, the pressure cylinders can be disassembled as a unit together with the anchor supports from the boom. Needless to say, however, the pressure cylinders can also remain on the boom and the anchor supports can be disassembled without the pressure cylinders.
According to an advantageous embodiment of the invention, a connector can be provided on each anchor support, for detachable connection with the individual boom section; advantageously, at least one pivot axle is provided between the connector and the anchor support, and the pressure cylinder is pivoted on the one hand to the connector and on the other hand to the anchor support. The anchor supports can be removed as a unit from the boom, said unit including the pivoted housing of the anchor supports as well as the pressure cylinder for pivoting of the anchor supports.
For additional ease of assembly and disassembly, the anchor supports are pivoted directly to the individual boom section, free of cross connections, erection frames, and the like. This means that each anchor support can be disassembled individually, without any need to first detach from other anchor supports.
The invention is explained in greater detail below by means of one preferred embodiment and pertinent drawings. The drawings show:
The vehicle crane 1 shown in the drawings has in known manner a superstructure 2 that can rotate on an upright shaft and which is positioned on the vehicle chassis. Pivoted on superstructure 2 is a telescoping boom 3 that luffs on a horizontal shaft and which consists of a pivot section 4 as well as telescoping sections 16, 17, 18, and 19 that can telescope out of said pivot section 4.
Two anchor supports 6 are pivoted to collar 5 of pivot section 4. Pivoted at the tops of anchor supports 6 are anchor cables or anchor rods, by means of which the anchor supports are anchored against the tops of the boom or the collar of an outward telescoping section and the superstructure or the lower portion of the pivot section. The anchor supports 6 are thus flexibly pivoted, so that they can be opened out of a position, shown in
The anchor supports 6 can thus be detached from collar 5 of pivot section 4. As shown in
As shown in
Number | Date | Country | Kind |
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202 03 443 U | Mar 2002 | DE | national |
102 28 345 | Jun 2002 | DE | national |
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1751383 | Aug 1957 | DE |
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Number | Date | Country | |
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20040000531 A1 | Jan 2004 | US |