Vehicle crane with removable mounting superstructure and method of rigging the same

Abstract

To provide a vehicle crane and a method of rigging the vehicle crane that can be more flexibly adapted to usage conditions.SOLUTION: There is provide a vehicle crane 1 having a superstructure 3 rotatably mounted on a lower carriage 2 and having a telescoping main jib 4, in which the superstructure 3 consists of a base superstructure 6 and a mounting superstructure 8 removably disposed thereon, and the mounting superstructure 8 receives at least one main counterweight 9a, 9b. At least one auxiliary support 15a, 15b serving as a hinged support is fixed to the mounting superstructure 8. Rear end portions 15ah, 15bh of the auxiliary support are suspended via tension rope means 14a, 14b. Auxiliary counterweights 10a, 10b are suspended from the rear end portions 15ah, 15bh of at least one auxiliary support 15a, 15b.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle crane having a superstructure rotatably mounted on a lower carriage and having a telescoping main jib, the superstructure consisting of a base superstructure and a mounting superstructure removably disposed thereon, the mounting superstructure receiving at least one main counterweight. The present invention also relates to a method for rigging such a vehicle crane.

[0002] European publication EP 0 779 235 A2 discloses a mobile crane comprising a lower carriage with tracks or wheels and a superstructure with a telescopic main jib rotatably attached to the lower carriage. A short lattice mast is bolted to the rear end of the superstructure by means of a guy rope bracket and receives a lifting and luffing mechanism arranged in particular in the superstructure. The lifting and luffing mechanism arranged in this way aft is intended to contribute to the increase of the counterweight. The short lattice mast can be bolted to the superstructure in a horizontal or rearwardly upward direction. The short lattice mast further comprises a base mast bolted to the superstructure and having a main weight suspended therefrom, and an auxiliary mast arranged pivotally on the base mast and having an auxiliary counterweight further suspended therefrom. The lifting and luffing mechanism is arranged on the base mast. By means of the pivotable auxiliary mast, the second counterweight can be raised from the ground from a non-working position on the ground to a working position.

[0003] German published document DE 38 38 975 A1 discloses a further vehicle crane with a lower carriage, a superstructure, a telescopic main jib and a counterweight. The counterweight is not part of the superstructure, but consists of a counterweight support with a counterweight plate and is suspended by a suspension rod. The suspension rod is suspended from a mast arranged in the manner of a tension bracket in a hoistable manner on the superstructure. Furthermore, the counterweight support is guided via horizontal guide rods relative to the superstructure and at intervals on the superstructure. In this case, the mast, the suspension rod and the guide rod are each telescopic, increasing or decreasing the spacing between the counterweight and the superstructure and, if necessary, increasing or decreasing the associated counterweight moment. To move the vehicle crane, the mast, the suspension rod and the guide rod are telescopic, the mast is folded and the mast, the suspension rod, the guide rod and the counterweight support are placed on the lower carriage. In a conventional method for operating a vehicle crane, a counterweight support, which may also be transported on a lower carriage, may carry individual counterweight plates which may be transported separately to the point of use.

[0004] Furthermore, German published document DE 10 2015 006 439 A1 discloses a mobile crane with a counterweight arrangement that can be attached to a superstructure and transported separately to the place of use. The counterweight arrangement comprises a base frame that can be separated from the superstructure, a winch and two opposing pivot arms that are articulated to the base frame and each have a counterweight stack. The pivot arms can each pivot relative to the base frame about a vertical bearing in order to move the counterweight stack in a horizontal plane and change the counterweight radius and / or the pivot radius of the superstructure. To attach the counterweight arrangement to the superstructure, a ballast cylinder is arranged on the counterweight arrangement, with the aid of which the counterweight arrangement arranged on the lower carriage of the mobile crane can be raised and coupled to the superstructure.

[0005] Furthermore, German published document DE 29 17 829 A1 discloses a further vehicle crane with a superstructure, which receives a counterweight in a known manner and which also connects a rearwardly projecting hinged support which is pivotable about a horizontal axis and whose free end is suspended at the top from the telescopic jib of the vehicle crane via a tensioning means. An auxiliary counterweight is likewise suspended from the free end of the hinged support. Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a vehicle crane and a method of rigging a vehicle crane which can be more flexibly adapted to the conditions of use. [Means for solving the problem]

[0007] This object is achieved by a vehicle crane having the features of claim 1 and by a method for rigging this vehicle crane having the features of claim 19. Advantageous embodiments of the vehicle crane are set out in claims 2 to 18 and advantageous embodiments of the method are set out in claims 20 to 22.

[0008] According to the invention, in the case of a vehicle crane having a superstructure with a telescopic main jib rotatably mounted on the undercarriage, the superstructure consisting of a base superstructure and an attachment superstructure removably arranged thereon, the attachment superstructure receiving at least one main counterweight, a more flexible adaptation to the conditions of use is achieved by the fact that at least one auxiliary support acting as a hinged support is fastened to the attachment superstructure, the rear end of which is suspended from the main jib head, in particular via a tension rope means on the main jib and / or the auxiliary jib and / or the adapter, and the auxiliary counterweight is suspended from the rear end of the at least one auxiliary support. The hinged support is connected to the attachment superstructure via joints in a conventional manner, so that only compressive forces and not bending forces are introduced into the attachment superstructure. A central advantage of the invention can be seen in the modular construction of the vehicle crane, which provides the desired more flexible adaptation to the conditions of use of the vehicle crane. Thus, the mounting superstructure with the main counterweight, which can be detached from the base superstructure, and the at least one auxiliary support can be flexibly transported between the respective places of use of the vehicle crane, either together with the vehicle crane or separately from the vehicle crane. This ensures that the vehicle crane can be driven on public roads in a road-traveling state with components such as the mounting superstructure, the main counterweight and the at least one auxiliary support released, in accordance with relevant statutory and local regulations, such as maximum axle loads and permissible total weight. The at least one auxiliary support and the flying auxiliary counterweight allow the counterweight moment to be more widely adapted to the conditions of use of the vehicle crane. This type of vehicle crane rigging with a flying auxiliary counterweight is particularly suitable for a main jib with a total extended length of about 35 m. By using a flying auxiliary counterweight with a larger counterweight radius, the weight of the entire required counterweight can be reduced accordingly.

[0009] Structurally speaking, it is provided in a particularly advantageous manner that at least one auxiliary support is articulatedly fastened to the mounting superstructure. This allows the effective weight moment of the auxiliary counterweight and the rear outreach of the vehicle crane to be easily adapted to the conditions of use by pivoting the auxiliary support horizontally and / or vertically. The articulated arrangement also allows the counterweight to be passively lowered when the crane or the guying means are released, thereby preventing rearward tilt. In this case, the crane system, consisting in particular of the main jib, the guying means, the counterweight, the auxiliary support, the lift cable and the load, fixed forward, is deflected rearward when the load is being lowered, and the counterweight close to the ground is lowered to the ground surface. Due to the permitted passive pivoting capacity, the articulated auxiliary support eases the rear guying arrangement, in particular the auxiliary support and the guying means.

[0010] In this case, it is advantageous for the at least one auxiliary support to be able to pivot by an angle between 40° and 130°. This angle range is measured between a vertical line passing through the joint with the horizontal pivot axis and the longitudinal axis of the at least one auxiliary support. The angle value increases by pivoting the at least one auxiliary support downwards towards the ground. An auxiliary support standing parallel to the vertical direction has a rotation angle of 0°.

[0011] The rigging procedure is facilitated by the fact that the auxiliary supports are fastened to the mounting superstructure so that they can be placed on the ground or on the undercarriage, without the guying means being fastened and tensioned yet.

[0012] In a preferred embodiment, the length of the at least one auxiliary support is at least 3 m.

[0013] In a particularly advantageous embodiment, first and second auxiliary supports each having an auxiliary counterweight extend rearward starting from the mounting superstructure, whereby at least the rear ends of the auxiliary supports are arranged opposite each other and spaced apart transversely with respect to the longitudinal direction of the mounting superstructure, so that the tension rope means assigned to the auxiliary counterweights can run without crossing the luffing cables of the luffable auxiliary jib, which are arranged in a conventional manner in the longitudinal region of the mounting superstructure.

[0014] Advantageously, at least one auxiliary support is designed as a lateral superlift arm, so that it can be used as such in connection with another type of rigging of the vehicle crane, and not as an auxiliary support. In the case of longer main jibs having a length of more than 35 m, the auxiliary support is used as a lateral superlift arm and is fastened to the base box of the main jib in the conventional manner.

[0015] In a particularly advantageous embodiment, the at least one auxiliary support is divided into a start part and an end part which are connected to one another so that they can be articulated and folded about a horizontal folding axis, whereby the desired counterweight moment from the auxiliary counterweight can be adapted more flexibly to the conditions of use of the vehicle crane over a wider range.

[0016] Installation and removal of the mounting superstructure is simplified by the fact that the mounting superstructure can be raised from a rigging position on the lower carriage to a mounting position adjacent the base superstructure and the mounting superstructure can be removably coupled to the base superstructure at the mounting position.

[0017] For this purpose it is realised in a particularly advantageous manner that at least one rigging cylinder is arranged on the mounting superstructure, via which the mounting superstructure can be raised from the rigging position to the mounting position.

[0018] As seen in a typical superstructure, during operation of the vehicle crane, at least one primary counterweight is stationary relative to the base superstructure. The term stationary does not include the rigging of the primary counterweight, where the counterweight plates are stacked in a conventional manner.

[0019] A structurally advantageous embodiment provides for a first and a second main counterweight to be provided, which are arranged opposite each other and spaced apart in the longitudinal direction of the mounting superstructure, thus allowing for a large counterweight and installation space for further components on the mounting superstructure at the same time.

[0020] Due to the fact that at least one lifting mechanism and / or one winch mechanism is arranged on the superstructure, the transfer of components, and therefore the transfer of weight, from the base superstructure to the mounting superstructure can be achieved.

[0021] The attachment of the auxiliary supports to the vehicle crane is simplified by the fact that at least one auxiliary support can be arranged in a rigging position on or at the undercarriage and connected to the mounting superstructure. For this purpose, a rest is advantageously arranged on the undercarriage, on which the at least one auxiliary support is placed in a rigging position. This rest can also be used for the arrangement of the main jib. Alternatively, the auxiliary supports can be rigged from the rigging frame or the low-bed truck directly onto the mounting superstructure. Here, the rigging frame can stand on the ground or, for better orientation of the parts, be connected to the front or rear support beam of the undercarriage and, possibly, to the front or rear frame, depending on the pivot position of the superstructure on the undercarriage.

[0022] To eliminate the need for a counterweight on the base superstructure so as to flexibly accommodate the total weight of vehicle cranes that can be driven on public roads.

[0023] Generally, it is advantageous for a roadworthy vehicle crane to have a wheeled undercarriage for travelling on the road.

[0024] In a particularly advantageous embodiment, the rear end of at least one auxiliary support is suspended from the main jib head via guying means on the main jib and / or on the auxiliary jib and / or on the adapter, preferably connected to only one of the aforementioned fastening points.

[0025] According to the invention, such vehicle cranes can be flexibly rigged in a variety of ways. The inventive method for rigging a vehicle crane described above allows for the construction of a vehicle crane with a flying assisted counterweight. The method comprises: Positioning at least one auxiliary support in a rigging position on the lower carriage; fastening at least one auxiliary support to the mounting superstructure; tensioning the rear end of at least one auxiliary support through tensioning means on the main jib head and / or an adapter or auxiliary jib, lattice section adjacent to the main jib head; and suspending an auxiliary counterweight from the rear end of the at least one auxiliary support. The at least one auxiliary support and the flying auxiliary counterweight allow the counterweight moment to be more widely adapted to the conditions of use of the vehicle crane. In this connection, the lattice part, e.g. the adapter on the main jib head, is then assigned to the main jib. Alternatively, the at least one auxiliary support can be arranged at a rigging position on the ground or on the transport vehicle or auxiliary frame.

[0026] In a particularly advantageous embodiment, before the at least one auxiliary support is placed in the rigging position on the lower carriage, the mounting superstructure is placed in the rigging position on the lower carriage, and the mounting superstructure is raised from its rigging position by at least one rigging cylinder to a mounting position adjacent to the base superstructure so that the mounting superstructure is fastened to the base superstructure.

[0027] In a particularly advantageous manner, at least one auxiliary support is adapted to be fastened to the mounting superstructure at its rigging position or at its mounting position.

[0028] In an advantageous embodiment, the positioning of the mounting superstructure and / or the main counterweight and / or the auxiliary support for the rigging procedure on the mounting superstructure is performed by the vehicle crane to be rigged itself, so that an auxiliary crane for rigging can be omitted.

[0029] Exemplary embodiments of the invention are explained in more detail below with reference to several figures. [Brief description of the drawings]

[0030] [Figure 1] FIG. 1 is a schematic perspective view of an inventive vehicle crane according to the invention in a first type of rigging having two main counterweights and two auxiliary counterweights; [Diagram 2] FIG. 2 is a side view of FIG. 1 from the area of ​​the upper structure and the lower carriage in a first rigging state; [Diagram 3] FIG. 3 is a side view of FIG. 2 in a second rigging state. [Figure 4] FIG. 3 is a side view of FIG. 2 in a third rigging state. [Diagram 5] FIG. 5 is a side view corresponding to FIG. 4 with an alternative design of the auxiliary jib. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] Figure 1 shows a schematic perspective view of a vehicle crane 1 according to the invention, comprising an undercarriage 2 with a cabin 7 for the driver and a superstructure 3 with a main jib 4 which can be erected and extended by means of a hydraulic luffing cylinder 12. The superstructure 3 is mounted on the undercarriage 2 via a rotary connection 5 (see Figure 2) so that it can pivot about a vertical axis of rotation 3z (see Figure 2), which points in the z direction of a virtual Cartesian coordinate system.

[0032] Furthermore, the superstructure 3 is divided into a base superstructure 6 in front relative to the rotation axis 3z and a mounting superstructure 8 at the rear. The base superstructure 6 is supported on the undercarriage 2 via a rotation connection 5 and supports the main jib 4 via a horizontal luffing axis 4y and the mounting superstructure 8 which can be removably connected to the base superstructure 6. The horizontal luffing axis 4y is oriented in the y direction of a virtual Cartesian coordinate system. The base superstructure 6 is substantially characterized in that it does not include either a counterweight or a lifting mechanism or a luffing mechanism, i.e. it does not have a counterweight, a lifting mechanism or a luffing mechanism. These components are each part of the mounting superstructure 8. The mounting superstructure 8 is removably connected to the base superstructure 6 and therefore can be transported separately from the vehicle crane 1 between each use location of the vehicle crane 1. This allows the vehicle crane 1 to travel on public roads between use locations in a road travel state with components such as the mounting superstructure 8 released, in accordance with relevant regulations such as maximum axle load and permissible total weight.

[0033] In FIG. 1, the vehicle crane 1 is equipped with a first type of rigging with a telescopic main jib 4, two main counterweights 9a, 9b, two auxiliary counterweights 10a, 10b and a luffing-capable auxiliary jib 11. It is also feasible to use a type of rigging with only one main counterweight 9a, 9b and one or two auxiliary counterweights 10a, 10b. The telescopic main jib 4 is composed in a conventional manner of a foundation box 4a and one or more inner boxes 4b, one mounted coaxially inside the other and capable of telescoping in and out. The foundation box 4a is mounted in such a way that it is luffable around a luffing axis 4y with respect to the superstructure 3 or base superstructure 6 with the help of a hydraulic luffing cylinder 12.

[0034] To the main jib head 4c of the main jib 4, a luffing-capable auxiliary jib 11 is connected via an adapter 17. The auxiliary jib 11 is designed in a conventional manner with a lattice mast construction. The auxiliary jib 11 can also be designed as a box girder with a hollow box. The auxiliary jib 11 is manufactured in a conventional manner from steel. It is also feasible to construct it in fiber composite. It is also feasible to have the auxiliary jib 11 built up from jib parts of different designs, such as lattice mast, box, etc., each made of steel or fiber composite. The luffing of the auxiliary jib 11 is carried out in a conventional manner via one or in this case two luffing supports 11a in the area of ​​the main jib head 4c or the adapter 17, through which the luffing cable 11b runs from the tip of the auxiliary jib 11 or the forward area of ​​the auxiliary jib 11 to the luffing mechanism 13 (see FIG. 2) on the mounting superstructure 8. The luffing mechanism 13 is designed in a conventional manner as a hydraulically driven cable drum.

[0035] Furthermore, the main jib 4 is tensioned by two first and second auxiliary counterweights 10a, 10b and associated first and second tensioning means 14a, 14b, in particular cables, rods or a combination thereof. In this embodiment, the first and second tensioning means 14a, 14b are fastened to the main jib head 4c of the main jib 4 and to the area of ​​the adapter 17, respectively, and extend from this position to the first aft end 15ah of the first auxiliary support 15a and the second aft end 15bh of the second auxiliary support 15b, respectively. The first and second auxiliary supports 15a, 15b are fastened to the superstructure 3 and the attachment superstructure 8 at their opposite first and second forward ends 15av, 15bv, respectively, via joints. The first and second auxiliary supports 15a, 15b are therefore so-called hinged supports, which introduce only compressive forces and not bending forces into the attachment superstructure 8. The first and second auxiliary counterweights 10a, 10b are suspended from the first rear end 15ah of the first auxiliary support 15a and the second rear end 15bh of the second auxiliary support 15b via the first and second suspension means 16a, 16b, respectively. The first and second auxiliary supports 15a, 15b space the two auxiliary counterweights 10a, 10b rearward in each case from the superstructure 3 and the mounting superstructure 8, thereby increasing the effective counterweight radius corresponding to the spacing between the center of gravity of each of the two auxiliary counterweights 10a, 10b and the vertical axis of rotation 3z of the superstructure 3. The first and second guy rope means 14a, 14b and the first and second suspension means 16a, 16b are designed as cables, chains, rods or a combination thereof. In this case, the first and second auxiliary supports 15a, 15b are fastened in such a way that they are detachably and horizontally and vertically articulated to the rear end 8h (see FIG. 2) of the mounting superstructure 8. Seen from above, the first and second auxiliary supports 15a, 15b extend substantially symmetrically relative to the longitudinal axis of the superstructure 3, starting from the mounting superstructure 8 and spaced apart from each other in a V-shape.Due to the fact that the first and second auxiliary supports 15a, 15b are articulated to the mounting superstructure 8, the effective counterweight moment of the two auxiliary counterweights 10a, 10b can be changed, increased, decreased or adapted to the possible requirements of the use of the vehicle crane 1 by horizontal and / or vertical pivoting of the auxiliary supports 15a, 15b. Each of the auxiliary supports 15a, 15b is theoretically pivotable about an angle a between 0 degrees and 180 degrees, preferably between 40 degrees and 130 degrees. This angle range is measured between a vertical line (shown in dashed lines in FIG. 2) extending through the joint with the horizontal pivot axis and the longitudinal axis of at least one auxiliary support 15a, 15b (shown in dashed lines in FIG. 2). The angle value is increased by pivoting at least one auxiliary support 15a, 15b downwards towards the ground. The angle a of the auxiliary supports 15a, 15b standing parallel to the vertical is 0 degrees, while the angle a of the auxiliary supports 15a, 15b running parallel to the horizontal plane is 90 degrees. In FIG. 2, the angle a is about 80 degrees. The pivoting is performed between the rear end 8h of the mounting superstructure 8 and the front ends 15av, 15bv of the two auxiliary supports 15a, 15b via hydraulic cylinders, not shown. Furthermore, the auxiliary supports 15a, 15b can be designed to be variable in length or extendable by additional components. The two auxiliary counterweights 10a, 10b are each constructed in a conventional manner as a stack with a base support 10c and individual counterweight plates 10d stacked thereon (see FIG. 2). So-called lateral superlift arms can be used as auxiliary supports 15a, 15b, which in other types of rigging of vehicle cranes 1 are usually used in the guy rope area of ​​the main jib 4 and then articulated in the area of ​​the head of the foundation box 4a.

[0036] Furthermore, as is clear from FIG. 1, the first and second tensioning mechanisms 19a, 19b are arranged approximately in the middle of the respective auxiliary supports 15a, 15b so that the first and second guy rope means 14a, 14b can be tensioned. The first and second tensioning mechanisms 19a, 19b are typically designed as cable winches. For this purpose, not shown deflection rollers are arranged at the rear ends 15ah, 15bh, through which the first and second guy rope means 14a, 14b are fed to the associated tensioning mechanisms 19a, 19b. The tensioning mechanisms 19a, 19b are typically designed as hydraulically driven cable drums and can also cooperate with pulley block-type rope threading devices in the guy rope means 14a, 14b. It is also feasible to arrange the two tensioning mechanisms 19a, 19b not on the auxiliary supports 15a, 15b, but instead on the superstructure 3, in particular on the mounting superstructure 8.

[0037] In the above-mentioned first type of rigging, the main counterweights stacked on the attachment superstructure 8 are divided into a first main counterweight 9a and a second main counterweight 9b. In this case, the first and second main counterweights 9a, 9b are arranged laterally offset, spaced apart and opposite each other with respect to the longitudinal direction of the superstructure 3 and the attachment superstructure 8. In the working position of the first and second main counterweights 9a, 9b shown in FIG. 1, the first and second main counterweights 9a, 9b are arranged stationary on the attachment superstructure 8. Typically, the first and second main counterweights 9a, 9b are arranged at the opposite aft end of the superstructure 3, in particular at the aft end 8h of the attachment superstructure 8, with respect to the axis of rotation 3z of the superstructure 3 and the main jib 4. The first and second main counterweights 9a, 9b typically consist of a stack of counterweight plates 9d stacked in each case on a base support 9c (see FIG. 2). The base supports 9c are each laterally fastened to the mounting superstructure 8 or are part of the mounting superstructure 8.

[0038] Additionally, the vehicle crane 1 typically has four lateral support beams 20, each having a vertically extendable hydraulic strut 20a, by means of which the vehicle crane 1 can be supported on a ground surface 22 (see FIG. 2) during operation. The undercarriage 2 is provided with pneumatic and / or rubber-tired wheels 21, enabling the vehicle crane 1 to be driven on public roads.

[0039] Figure 2 shows a side view of Figure 1 from the area of ​​the superstructure 3 and the undercarriage 2 in a first rigging state. The rigging of the vehicle crane 1 according to the invention with the mounting superstructure 8, the two main counterweights 9a, 9b, the two auxiliary supports 15a, 15b and the two auxiliary counterweights 10a, 10b is explained in more detail below with reference to Figures 2 to 4.

[0040] In FIG. 2, the mounting superstructure 8 and the two main counterweights 9a, 9b are taken up together or successively separately from the trailer for transportation to the place of use, either by means of an auxiliary crane not shown or by means of the vehicle crane 1 and its main jib 4 itself, and are placed in a rigging position in the central part of the lower carriage 2 between the base superstructure 6 and the cabin 7 on the lower carriage 2. In this case, the mounting superstructure 8 is placed on the lower carriage 2 in a preselected rigging position, so that after the base superstructure 6 is pivoted with its rear end 6h towards the front in the direction of the cabin 7, the rear end 6h of the base superstructure 6 faces the front end 8v of the mounting superstructure 8 at a small distance. The mounting superstructure 8 is oriented in its rigging position so that, viewed from above, its central longitudinal axis is symmetrical to the central longitudinal axis of the lower carriage 2. The rear end 6h of the base superstructure 6 is provided with an upper first connection point 6a and a lower second connection point 6b for detachably fastening the mounting superstructure 8. The respective corresponding upper third connection point 8a and lower fourth connection point 8b are located opposite each other at the front end 8v of the mounting superstructure 8. The first to fourth connection points 6a, 6b, 8a and 8b are each designed as a conventional single or multi-cut bolt connection. Such bolt connections typically consist of a lug with a hole or a fork head with multiple lugs and an associated bolt, through which the lugs can be detachably connected to each other. In the present case, the first and third connection points 6a and 8a are each formed as a lug with a bore, and the second connection point 6b is formed as a hook open at the bottom for receiving a bolt fixedly placed on the lug at the fourth connection point 8b. When the mounting superstructure 8 is oriented in its rigging position on the lower carriage 2, the center points of the bores for receiving the bolts of the first to fourth connection points 6a, 6b, 8a and 8b are oriented vertically one behind the other and spaced apart from each other.Furthermore, as is apparent from FIG. 2, the lugs or hooks of the first to fourth connection points 6a, 6b, 8a and 8b protrude from the rear end 6h of the base superstructure 6 and the front end 8v of the mounting superstructure 8, respectively, when viewed from the side of the lower carriage 2, and engage with each other in a non-contact tooth-like arrangement.

[0041] After the mounting superstructure 8 with the main counterweights 9a, 9b has been placed in its rigging position on the undercarriage 2, the mounting superstructure 8 and the first and second auxiliary supports 15a, 15b are picked up from the trailer together or successively separately for transportation to the place of use, for their rigging position on the undercarriage 2 and on the support plate 23 normally used to support the main jib 4, by means of an auxiliary crane not shown or by means of the vehicle crane 1 and its main jib 4 itself. In their rigging position, the two auxiliary supports 15a, 15b are each oriented with their longitudinal axis parallel to the central longitudinal direction of the undercarriage 2 and spaced apart laterally, as viewed from above. Furthermore, the two auxiliary supports 15a, 15b adjoin the rear end 8h of the mounting superstructure 8 at their respective front ends 15av, 15bv.

[0042] In a next rigging step, the two auxiliary supports 15a, 15b are connected at their respective front ends 15av, 15bv to the rear end 8h of the mounting superstructure 8. Alternatively, it is feasible that this connection also takes place at a later point in time.

[0043] And in a further rigging step, using an auxiliary crane not shown, or using the vehicle crane 1 and its main jib 4 itself, the first and second auxiliary counterweights 10a, 10b are picked up from the trailer for transport to the site of use and placed on the ground 22 at a rigging position forward of the cabin 7 of the vehicle crane 1 and below the rear ends 15ah, 15bh of the first and second auxiliary supports 15a, 15b.

[0044] 2 it can be seen that the mounting superstructure 8 has at least one hydraulic rigging cylinder 24, which is centrally located in the center of gravity of the mounting superstructure 8 and supported on the lower carriage 2. The direction of movement of the rigging cylinder 24 is vertical, and thus the rigging cylinder 24 enables the mounting superstructure 8 together with the main counterweights 9a, 9b to be raised from the lower carriage 2 from the rigging position to the mounting position. It is also feasible to provide multiple rigging cylinders 24, which are symmetrically located with respect to the center of gravity of the mounting superstructure 8.

[0045] Contrary to the illustration in figure 1, in figure 2 a further lifting mechanism 18a is further arranged on the base superstructure 6. The further lifting mechanism 18a is also typically designed as a hydraulically driven cable drum.

[0046] FIG. 3 shows a side view of FIG. 2, in which the mounting superstructure 8, the two main counterweights 9a, 9b, the two auxiliary supports 15a, 15b and the two auxiliary counterweights 10a, 10b are in a second rigging state. To achieve this second rigging state, the mounting superstructure 8 with the two main counterweights 9a, 9b is raised from its inoperative position to its mounting position by at least one rigging cylinder 24. By a mere vertical movement, the mounting superstructure 8 and the base superstructure 6 are already automatically coupled together in the area of ​​the second and fourth connection points 6b and 8b at the bottom by bolts being tightened in the hooks that are open at the bottom. In the area of ​​the first and third connection points 6a and 8a at the top, bolts are inserted manually or automatically into the corresponding, now mutually aligned bores of the lugs, completing the coupling procedure.

[0047] If the connection of the two auxiliary supports 15a, 15b with their respective front ends 15av, 15bv to the rear end 8h of the mounting superstructure 8 has not yet been made, it can be made at this time. Alternatively, this connection can also be made automatically by a lifting movement of the mounting superstructure 8 with the two main counterweights 9a, 9b or by a corresponding design of the first to fourth connection points 6a, 6b, 8a and 8b.

[0048] Furthermore, in a further rigging step, the two auxiliary counterweights 10a, 10b are suspended from the front ends 15av, 15bv of the two auxiliary supports 15a, 15b, respectively, via the first suspension means 16a and the second suspension means 16b. At this point, the two auxiliary counterweights 10a, 10b are still on the ground 22.

[0049] Figure 4 shows a side view of Figure 2, in which the mounting superstructure 8, the two main counterweights 9a, 9b, the two auxiliary supports 15a, 15b and the two auxiliary counterweights 10a, 10b are in a third rigging state. To achieve this third rigging state, in a first rigging step after connecting the mounting superstructure 8 to the base superstructure 6, at least one rigging cylinder 24 is retracted and therefore no longer bears on the surface of the lower carriage 2. Subsequently, in a further rigging step, the first and second guy rope means 14a, 14b run from the two tensioning mechanisms 19a, 19b via the rear ends 15ah, 15bh of the first or second auxiliary supports 15a, 15b, respectively, to the main jib head 4c or the adjacent adapter 17 and are fastened in this position. Then, by tensioning the two guy rope means 14a, 14b via the two tensioning mechanisms 19a, 19b or by luffing the main jib 4, the two auxiliary supports 15a, 15b are tilted upwards at a desired angle from the substantially horizontal guy rope position to a working position. As a result, the two auxiliary counterweights 10a, 10b are also simultaneously lifted off the ground 22, generating a desired counterweight moment for the operation of the vehicle crane 1.

[0050] FIG. 5 is another side view substantially corresponding to FIG. 4 and showing an equivalent rigging situation. Therefore, reference is made to the above description regarding FIGS. 1 to 4, and only the features that deviate therefrom are described below. In this case, the auxiliary supports 15a, 15b have an alternative design. The aforementioned auxiliary supports 15a, 15b are rigid, integrally formed, have a predetermined length and are formed as hollow profiles. In contrast, the auxiliary supports 15a, 15b according to FIG. 5 are configured so that they can be folded centrally around a horizontal folding axis 15y. Correspondingly, the auxiliary supports 15a, 15b are divided into a front start part 15c and a rear end part 15d connected to each other so that they can be pivoted via a substantially horizontal axis. For the pivoting movement, a hydraulic folding cylinder 15e is provided and is appropriately supported on the one hand on the start part 15c and on the other hand on the end part 15d. The foldable auxiliary supports 15a, 15b allow a larger variation of the desired counterweight radius.

[0051] In this case, each of the auxiliary supports 15a, 15b is also theoretically pivotable about an angle a of 0 to 180 degrees, preferably 40 to 130 degrees, the angle range being measured between a vertical line (shown in dashed lines in FIG. 2) extending through the joint with the horizontal pivot axis and the linearly extending longitudinal axis of the deployed auxiliary supports 15a, 15b (shown in dashed lines in FIG. 2). [Explanation of symbols]

[0052] 1 Vehicle crane 2 Lower Carriage 3 Superstructure 3z Vertical axis of rotation 4 Main Jib 4a Basic box 4b Inner box 4c Main jib head 4y Roughing Axis 5 Rotating Connection 6 Base Superstructure 6a First connection point 6b Second connection point 6h Rear end 7 Cabin 8. Mounting superstructure 8a Third connection point 8b Fourth connection point 8h Rear end 8v front end 9a First main counterweight 9b Second main counterweight 9c Base support 9d Counterweight Plate 10a First auxiliary counterweight 10b Second auxiliary counterweight 10c Base support 10d Counterweight Plate 11 Auxiliary Jib 11a Roughing Support 11b Luffing Cable 12 Roughing cylinder 13 Ruffling mechanism 14a First tensioning means 14b Secondary tensioning means 15a First auxiliary support 15ah 1st rear end 15av 1st front end 15b Second auxiliary support 15bh 2nd rear end 15bv Second front end 15c beginning part 15d End 15e Folding cylinder 15y folding shaft 16a First hanging means 16b Second suspension means 17 Adapters 18 Lifting mechanism 18a Further lifting mechanism 19a First tensioning mechanism 19b Second tensioning mechanism 20 Support beam 20a post 21 wheels 22 Ground 23 Rest 24 Rigging Cylinder a Angle

Claims

1. A vehicle crane (1) having a superstructure (3) rotatably mounted on a lower carriage (2) and having a telescopic main jib (4), In a vehicle crane, the superstructure (3) comprises a base superstructure (6) and a mounting superstructure (8) detachably disposed thereon, wherein the mounting superstructure (8) receives at least one main counterweight (9a, 9b), The invention is characterized in that at least one auxiliary support (15a, 15b) that functions as a hinged support is fastened to the mounting superstructure (8), the rear ends (15ah, 15bh) of the auxiliary support are suspended via guy ropes (14a, 14b), and auxiliary counterweights (10a, 10b) are suspended from the rear ends (15ah, 15bh) of the at least one auxiliary support (15a, 15b). Vehicle crane (1).

2. The at least one auxiliary support (15a, 15b) is articulated and fastened to the mounting upper structure (8). The vehicle crane (1) according to claim 1.

3. The at least one auxiliary support (15a, 15b) is characterized in that it can pivot by an angle (a) of 40 to 130 degrees. The vehicle crane (1) according to claim 2.

4. The auxiliary supports (15a, 15b) are fastened to the mounting upper structure (8) so that the auxiliary supports (15a, 15b) can be positioned on the ground (22) or the lower carriage (2). A vehicle crane (1) according to any one of claims 1 to 3.

5. The at least one auxiliary support (15a, 15b) is characterized by having a length of at least 3 m. The vehicle crane (1) according to claim 1.

6. The first and second auxiliary supports (15a, 15b), each having an auxiliary counterweight (10a, 10b), are characterized in that they start from the mounting upper structure (8) and extend rearward. The vehicle crane (1) according to claim 1.

7. The at least one auxiliary support (15a, 15b) is designed as a lateral super lift arm. The vehicle crane (1) according to claim 1.

8. The at least one auxiliary support (15a, 15b) is divided into a starting portion (15c) and an ending portion (15d) that are connected to each other so that they can be articulated and folded around a horizontal folding axis (15y). The vehicle crane (1) according to claim 1.

9. The mounting upper structure (8) can be raised from the rigging position on the lower carriage (2) to a mounting position adjacent to the base upper structure (6), and the mounting upper structure (8) can be detachably connected to the base upper structure (6) at the mounting position. The vehicle crane (1) according to claim 1.

10. The present invention is characterized in that at least one rigging cylinder (24) is positioned on the mounting upper structure (8), and the mounting upper structure (8) can be raised from the rigging position to the mounting position via the rigging cylinder. The vehicle crane (1) according to claim 1.

11. The at least one main counterweight (9a, 9b) is characterized in that it remains stationary relative to the base superstructure (6) during the operation of the vehicle crane (1). The vehicle crane (1) according to claim 1.

12. The mounting upper structure (8) is characterized by having first and second main counterweights (9a, 9b) that are positioned opposite each other and spaced apart in the longitudinal direction. The vehicle crane (1) according to claim 1.

13. The invention is characterized in that at least one lifting mechanism and / or winch mechanism is arranged on the mounting upper structure (8). The vehicle crane (1) according to claim 1.

14. The at least one auxiliary support (15a, 15b) is positioned at a rigging location on the lower carriage (2) and can be connected to the mounting upper structure (8). The vehicle crane (1) according to claim 13.

15. A rest (23) is positioned on the lower carriage (2), and at least one auxiliary support (15a, 15b) is placed on the rest at the rigging position. The vehicle crane (1) according to claim 14.

16. The base upper structure (6) is characterized by not having a counterweight. The vehicle crane (1) according to claim 1.

17. The lower carriage (2) is characterized by being provided with wheels (21) for traveling on roads. The vehicle crane (1) according to claim 1.

18. The rear end (15ah, 15bh) of at least one auxiliary support (15a, 15b) is suspended from the main jib head (4c) via the guy rope means (14a, 14b) on the main jib (4) and / or auxiliary jib (11) and / or adapter (17). The vehicle crane (1) according to claim 1.

19. A method for rigging a vehicle crane (1) as described in Claim 1, The steps include: positioning at least one auxiliary support (15a, 15b) at the rigging position on the lower carriage (2); The steps include fastening the at least one auxiliary support (15a, 15b) to the mounting upper structure (8), The steps include tacking the rear ends (15ah, 15bh) of at least one auxiliary support (15a, 15b) via guying means (14a, 14b) on the main jib head (4c) and / or adjacent adapter (17) or auxiliary jib (11), The steps include: suspending auxiliary counterweights (10a, 10b) from the rear ends (15ah, 15bh) of at least one auxiliary support (15a, 15b); A method that includes this.

20. Before positioning the at least one auxiliary support (15a, 15b), the mounting superstructure (8) is positioned at a rigging position on the lower carriage (2), the mounting superstructure (8) is raised by at least one rigging cylinder (24) from its rigging position to a mounting position adjacent to the base superstructure (6), and the mounting superstructure (8) is fastened to the base superstructure (6). The method according to claim 19.

21. The at least one auxiliary support (15a, 15b) is fastened to the mounting superstructure (8) at its rigging position or mounting position. The method according to claim 19 or 20.

22. The mounting upper structure (8) and / or the main counterweights (9a, 9b) and / or the auxiliary supports (15a, 15b) are positioned by the vehicle crane (1) itself on the lower carriage (2) of the vehicle crane (1) for the rigging procedure. The method according to claim 19 or 20.

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