Frame for transporting concrete distribution booms

Abstract

The present invention relates to a frame for carrying a concrete dispensing boom, the frame comprising a carrier profile (13) having at least one force-absorbing region (16, 17) for absorbing the force flow applied by the concrete dispensing boom and force-dissipating regions (18) spaced apart along the longitudinal direction of the carrier profile (13) for dissipating the force flow to the ground. The carrier profile (13) includes at least two profile plates (20, 21), each bent along at least one bending axis (26, 27, 31) and assembled along at least two connection lines (22, 23) to form a hollow profile. The carrier profile formed by the bent profile plates is simple to manufacture and flexible to use.

Description

[Technical Field]

[0001] This invention relates to a frame for transporting a concrete distribution boom.

[0002] To discharge concrete using a mobile or stationary concrete pump, a concrete distribution boom, typically supported by a frame, is used. Therefore, a base called a boom stand is usually fixed to the frame, and a concrete distributor is mounted on the boom stand so as to rotate around a vertical axis. In addition, the concrete distribution boom can consist of multiple boom segments designed to pivot relative to each other to reach the desired discharge position. The concrete, pressurized by the pumping device, can be discharged to the desired location via a concrete delivery line guided along the concrete distribution boom.

[0003] In particular, when the boom segment is extended, large load torques are generated, and these load torques must be introduced into the frame and then dissipated from the frame to the ground. For this purpose, the frame is usually oriented in the longitudinal direction of the frame and has two carrier profiles that help transmit the flow of force.

[0004] The use of frames with a carrier profile consisting of closed square tube frames manufactured by an extrusion process is known in principle in the prior art. Such square tube frames have high rigidity and stability. However, the disadvantages of closed square tube frames are that they are complex to manufacture and lack flexibility.

[0005] In view of this background, the object of the present invention is to provide a frame for carrying a concrete distribution boom that can at least partially avoid the aforementioned disadvantages, and a concrete pump having such a frame. This object is achieved by the features of the independent claim. Advantageous embodiments are specified in the dependent claims.

[0006] The frame according to the present invention for carrying a concrete distribution boom comprises a carrier profile having at least one force absorption region for absorbing the flow of force applied by the concrete distribution boom, and force dissipation regions spaced apart in the longitudinal direction of the carrier profile for dissipating the flow of force to the ground. The carrier profile comprises at least two profile plates, each of which is bent along at least one bending axis and assembled along at least two connection lines to form a hollow profile.

[0007] First, some of the terms used herein will be explained. The frame according to the present invention has, for example, at least one, preferably two, carrier profiles that can be oriented parallel to each other. For simplicity, in the context of this specification, only the configuration of a single carrier profile will be described in many respects. It will be understood that the frame according to the present invention may also have two or more carrier profiles that may have the features described in the context of this specification. A carrier profile typically has a longitudinal direction along which the flow of force is directed from a force absorption region to a force dissipation region. This longitudinal direction may correspond to the longitudinal direction of the frame. The frame may have a boom base, in particular, which helps to connect a concrete distribution boom. The boom base is typically fixedly connected to the carrier profile in the force absorption region of the carrier profile and is preferably designed to rotatably mount the concrete distribution boom about a vertical axis. The frame may further have a support system, which support frame is connected to the carrier profile in the force dissipation region and is designed to introduce the flow of force transmitted by the carrier profile to the ground.

[0008] A substantial portion of the force flow (e.g., more than 10%, more than 20%, or more than 30%) is transmitted from the force absorption region along the carrier profile (or, where appropriate, along the carrier profile) to the force dissipation region. In this respect, the frame differs from support structures (see, e.g., EP 3 369 876 A1) in which the force flow is directly introduced from the boom base to a support structure formed by a support leg box and then to an extendable or outwardly swivelable support leg connected thereto. In the case of this frame, the carrier profile already performs the corresponding rear support function together with the support system fixed to it, so a rear support leg is not necessarily required. Since a rear support leg occupies a large space during use after extension or swivel, the space requirements of this frame are reduced accordingly. Furthermore, the absence of a rear support leg makes a larger load area available on the frame.

[0009] In connection with the present invention, it is recognized that bent profile plates enable the production of cost-effective carrier profiles that are reliable and flexible in use. In particular, it has been shown that assembling profile plates along two connection lines that can be screwed or welded to each other results in a stable carrier profile with low distortion. Furthermore, through the appropriate selection of the bending axis and bending angle, the cross-sectional shape of the carrier profile can be adapted in a considerably simpler manner compared to the previously known square tube frames whose shape is predetermined by the extrusion process.

[0010] The carrier profile of a frame is typically also used to secure mounting components to it. These mounting components can be, for example, platform holders, components of support systems, retaining devices for pumping equipment, piping, or water tanks, connecting struts for connecting boom bases to the carrier profile, and / or components of boom support bases. Therefore, in a preferred embodiment, at least one of the profile plates has a fixing opening for securing mounting components to the carrier profile. The fixing opening can form a passage to the internal region of the hollow profile. In contrast, in the case of rectangular tube frames known from the prior art and manufactured by an extrusion process, the subsequent fabrication of the fixing opening is extremely complex, and as a result, mounting components are typically secured by welding. This is costly and lacks flexibility. Conversely, the pre-formed fixing openings at desired locations within the carrier profile of the frame described herein allow for flexible and releasable mounting of mounting components. Furthermore, the profile plate can be readily provided with a desired number of fastening openings before it is assembled to form a hollow profile, and preferably before it is bent, and the profile plate can be readily assembled to be bent only in a later step to form a hollow profile. In addition, the removability of the mounting components creates clearance that allows for the repair and maintenance of components that would otherwise be blocked by the mounting components.

[0011] Finally, it has been shown that any weakening of the carrier profile's stability caused by the fixing opening can be easily compensated for by the corresponding (larger) dimensions of the hollow profile or profile plate. In particular, by appropriately selecting the bending axis and bending angle, within the scope of the present invention, it is possible to make more effective use of existing installation space and thereby increase the stability of the carrier profile in a simple manner.

[0012] The access opening can be provided adjacent to the fixing opening. Thereby, easy access can be achieved to the fixing means for fixing the mounting part to the fixing opening. This is particularly applicable when the fixing opening forms a passage to the inner region of the hollow profile. The area of the fixing opening can be more than 0.3 cm , 2 , ,

[0015] , 2 ,

[0014] , 2 , , , 2 , , ,

[0013] The area of the fixing opening can exceed 0.3 cm 2 and can range from 20 cm 2 Preferably, it can range from 0.5 cm 2 to 10 cm 2 More preferably, it can range from 0.8 cm 2 to 2 cm 2 The access opening can have an area larger than 100 cm 2 For example, the area of the access opening can be between 100 cm 2 and 500 cm 2 Preferably, it can be between 120 cm 2 and 400 cm 2 More preferably, it can be between 140 cm 2 and 300 cm 2 In one embodiment, the connecting line can be oriented parallel to the longitudinal direction of the carrier profile. In this case, the force flow is directed along the connecting line, as a result, the load on the connection is reduced and the rigidity of the hollow profile is increased.

[0013] In one embodiment, the bending axis is oriented parallel to the longitudinal direction of the carrier profile. The rigidity of the hollow profile can also be improved in this way because the force flow continues along the bending axis.

[0014]

[0015] ​Profile plates can be joined to each other along connection lines to form a hollow profile. The joining connection can be, for example, a welded connection. However, alternative joining connections, such as adhesive connections, can also be considered. Using a welded connection yields a hollow profile with very stable torsional resistance. Furthermore, in cross-sectional view, it has been shown that since each profile plate is welded to the adjacent profile plate at two opposing ends, the welding strain generated during welding as a result of the action of heat is extremely small. This effectively eliminates material distortion due to welding.

[0016] In particular, a hollow profile can be composed of two profile plates. In this case, the profile plates can be divided into lower portions by a bending axis when viewed in cross-section. The outer lower portions of the profile plates can be angled to each other between 75° and 105°, preferably between 85° and 95°, and more preferably substantially 90°. Furthermore, in the region of the connecting line, one outer profile plate portion of the profile plate can be angled to the other adjacent outer profile plate portion of the profile plate between 75° and 105°, preferably between 85° and 95°, and more preferably substantially 90°. In one embodiment, the hollow profile further has a maximum cross-sectional width and a maximum cross-sectional height, and the connecting lines face each other diagonally within a virtual rectangle formed by the maximum cross-sectional width and the maximum cross-sectional height. In this case, the profile plates can have a specific L-shape. It has been shown that the above features further contribute to the fact that welding strain present in the region of the connecting line is eliminated as completely as possible, and as a result the finished hollow profile is as distortion-free as possible.

[0017] In one embodiment, one of the profile plates may have a lower portion defined by a bending axis, forming the lower side of the carrier profile, and having a width less than the maximum cross-sectional width of the hollow profile. This can be achieved, in particular, by appropriate selection of the bending axis and bending angle, and as a result, the cross-section of the hollow profile increases from the bottom upwards. Since the installation space is often limited, especially in the lower region of the carrier profile, the above-mentioned cross-sectional expansion can more effectively utilize the installation space further above and increase the stability of the carrier profile.

[0018] The hollow profile may have a cross-sectional width of 10 cm to 45 cm, preferably 10 cm to 16 cm. The cross-sectional height of the hollow profile may be in the range of 20 cm to 90 cm, preferably 20 cm to 32 cm.

[0019] Furthermore, in cross-section, the profile plate may have overhangs that extend beyond the connection line, preferably between 0.5 cm and 5 cm, and more preferably between 1 cm and 3 cm. The overhangs simplify the fabrication of the hollow profile, especially when using weld connections, and ensure a reliable connection that is continuous along the longitudinal direction. In particular, it facilitates the guidance of the welding torch, and the weld seam can be constructed in a simple manner, for example, as a filament seam or HY seam. Moreover, the force introduction point (for example, by the articulated joint of a strut) can be realized in a simpler manner in the region of the overhang.

[0020] Furthermore, the present invention relates to a frame for carrying a concrete distribution boom, which has a carrier profile having at least one force-absorbing region for absorbing the flow of force applied by the concrete distribution boom, and a force-dissipating region positioned longitudinally apart from the force-absorbing region for dissipating the flow of force to the ground. The carrier profile further comprises tabs projecting upward from the force-absorbing region to absorb and transmit at least a portion of the flow of force. In particular, two force-absorbing regions can be provided, spaced longitudinally apart in the carrier profile, to absorb the flow of force applied by the concrete distribution boom, and the tabs can be positioned in the rear region of the force-absorbing region with respect to the longitudinal direction. In the forward region of the force-absorbing region, in particular at the front longitudinal end of the carrier profile, it is possible in a conventional manner to set up a boom base for mounting the concrete distribution boom on the carrier profile.

[0021] The second force absorption region is longitudinally spaced from the first force absorption region. The spacing can correspond to a length that is, for example, 10% to 90%, preferably 25% to 75%, of the longitudinal range of the carrier profile. The tab can extend longitudinally over a length that is in the range of 3% to 50%, preferably 5% to 30%, of the longitudinal range of the carrier profile. The above frame can be developed by further features described within the context of this specification.

[0022] The frame may have a boom base connected to tabs by connecting struts, and the connection is preferably made by bolt connections.

[0023] The tab can further have an upper edge portion, and the orientation of this upper edge portion has an angular deviation of less than 15°, preferably less than 10°, more preferably less than 5°, corresponding to the orientation of the connecting strut. The maximum range of the tab along the vertical axis can be in the range of 3 cm to 50 cm, preferably in the range of 5 cm to 45 cm, more preferably in the range of 10 cm to 35 cm. Further, the range along the vertical axis can decrease in the direction of the rear end portion of the carrier profile. The tab can preferably be formed by a sheet metal part oriented parallel or substantially parallel to the longitudinal direction of the carrier profile. The tab can also be formed as an integral component of the carrier profile.

[0024] In one embodiment, the carrier profile comprises at least two profile plates, each of which is bent along at least one bending axis and assembled along at least two connecting lines to form a hollow profile, and the tab is formed as an integral component of one of the profile plates.

[0025] The present invention further relates to a concrete pump comprising a frame according to the present invention, a concrete distribution boom connected to the frame, and a pump device designed to discharge concrete. This arrangement can be developed by the further features described above in relation to the frame according to the present invention.

[0026] The pump device is preferably mounted on the frame of the present invention. The concrete pump can be a stationary or mobile concrete pump. In the case of a mobile concrete pump, the frame can be designed to be connected to the chassis of a truck.

[0027] Furthermore, the present invention relates to a method for manufacturing a carrier profile comprising the following steps. · The step of providing at least two profile plates, · The step of creating at least one fixing hole in at least one of the profile plates, • The step of bending each profile plate along its respective bending axis. • Steps to assemble profile plates to form a hollow profile, • Step of connecting the profile board along the two connection lines.

[0028] This method can be further developed by the aforementioned features relating to the frame according to the present invention. In particular, the profile plates can be joined by joining methods, especially welding.

[0029] Further advantages and improvements of the present invention will become apparent from the dependent claims, specification and accompanying drawings.

[0030] It will be understood that the features described above and those further described below can be used not only in the specified combinations but also in other combinations or separations, without departing from the scope of the present invention. [Brief explanation of the drawing]

[0031] The present invention is illustrated in the drawings based on exemplary embodiments and will be described in detail below with reference to the drawings. [Figure 1] Figure 1 shows a three-dimensional side view of a frame according to the present invention. [Figure 2] Figure 2 shows a three-dimensional side view of the carrier profile used in the embodiment shown in Figure 1. [Figure 3] Figure 3 shows a cross-sectional view of the carrier profile in Figure 2. [Figure 4] Figure 4 shows a three-dimensional side view of a further embodiment of the frame according to the present invention. [Figure 5] Figure 5 shows a three-dimensional side view of the carrier profile used in the embodiment shown in Figure 4.

[0032] Detailed explanation

[0033] Figure 1 shows a three-dimensional side view of a frame 100 according to the present invention. The frame 100 comprises two carrier profiles 13 oriented parallel to each other and extending along its longitudinal direction, and a boom base 14 connected to the carrier profiles 13. A concrete distribution boom (not shown) can be connected to the boom base 14 by a rotatable bearing in a manner known in principle. A support leg box 11 is also connected to the boom base 14, and a retractable support leg 12 is mounted inside this support leg box 11. In this case, the support leg box 11 is also present on the carrier profiles 13.

[0034] The boom base 14 is connected, on the one hand, to a first connection region 16 located at the front end of the carrier profile 13. On the other hand, the boom base 14 is connected to a second connection region 17 spaced longitudinally apart on the carrier profile 13 via a connecting strut 15 designed as a corner profile. The two connection regions 16 and 17 represent force absorption regions in the sense of the present invention.

[0035] The force dissipation region 18 is located at the rear end of the carrier profile 13 (right side in Figure 1). In this force dissipation region, the carrier profile 13 is connected to a support system comprising a crossing member 19b and two upright legs 19a. The two force absorption regions 16 and 17 are spaced apart from the force absorption region 18 in the longitudinal direction of the carrier profile 13 so that the force flow introduced through the force absorption regions 16 and 17 is directed towards the force absorption region 18 located at the rear end along the longitudinal direction of the profile carrier 13. The force flow is illustrated by arrow 10. A transverse rod 9 is also connected to the carrier profile 13. The connection between the transverse rod 9 and the carrier profile 13 is achieved by a fixing opening present in the carrier profile 13 (not visible in Figure 1).

[0036] Figure 2 shows a three-dimensional side view of a portion of the carrier profile 13 used in the embodiment of Figure 1. Figure 3 shows a cross-sectional view of this carrier profile 13. It can be seen from the figures in Figures 2 and 3 that the carrier profile 13 comprises two profile plates 20, 21 assembled to form a hollow profile by welding them together along two connection lines 22, 23. This results in a hollow profile with a cross-sectional width 24 of approximately 14 cm and a cross-sectional height 25 of approximately 28 cm. Profile plate 21 has an overhang of approximately 2 cm that extends beyond the connection lines 22, 23 and is not counted as part of the cross-sectional width 24 or cross-sectional height 25.

[0037] The profile plate 20 is bent at approximately 90° around the bending axis 27, so that it has two lower portions 20a and 20b separated from each other by the bending axis 27 and at a 90° angle to each other. The profile plate 21 is bent at approximately 45° around two bending axes 26 and 31, so that it has three lower portions 21a, 21b and 21c separated from each other by the bending axes 26 and 31. The portions 21a and 21c, each located at the edge of the profile plate 21, and the portions 20a and 20b of the profile plate 20 are at an angle of approximately 90° to each other. In addition, the connecting lines 22 and 23 are obliquely opposite each other in a virtual rectangle formed by the cross-sectional width 24 and the cross-sectional height 25.

[0038] When using the aforementioned overhangs, it has been shown that a reliable and stable welded joint can be created using profile plates that are perpendicular to each other. In addition, distortion of the components resulting from heat during welding can be virtually completely avoided by the symmetrical arrangement of the connection lines, and as a result, subsequent straightening of the carrier profile 13 is not necessary.

[0039] The lower portion 21c of the profile plate 21 that forms the lower side of the carrier profile 13 has a width smaller than the maximum cross-sectional width 24 of the carrier profile 13. This means that the carrier profile 13 requires less installation space in the lower region. By selecting the bending axes 26 and 31, the cross-section of the carrier profile increases from the bottom to the top until it reaches the total maximum cross-sectional width 24 at the height of the bending axis 26. This increase in cross-section allows for better utilization of the unrestricted installation space present in the upper region of the carrier profile, thereby increasing the stability of the carrier profile 13.

[0040] The above embodiment of the profile plate 21 having three lower sections 21a, 21b, and 21c at a certain angle to each other allows for clearance in the lower section for chassis components (such as protruding spring brackets) or wing holders, for example, despite the large cross-section in the upper section of the carrier profile, and ensures good accessibility during inspection. Furthermore, the inclined lower section 21b, which is inclined at approximately 45° relative to the lower sections 21a and 21c, allows for a force flow that is harmonized with respect to cross-sectional values ​​(regional moment of inertia, bending, torsional, and shear flow) while maximizing the use of installation space compared to other types of cutouts (such as a 90° inclined cutout).

[0041] Figure 2 further shows a fixing opening 29 located in the profile plate 21 and an access opening 28 located adjacent to the fixing opening 29. Mounting components, such as the transverse rod 9 shown in Figure 1 and missing in Figure 2 for clarity, can be inserted into the fixing opening. The fixing opening 29 eliminates the cost of creating a welded connection between the mounting component and the carrier profile. The fixing opening allows the mounting component to be screwed into the carrier profile 13 in a simple manner and, if necessary, removed or moved again.

[0042] Figure 4 shows a three-dimensional side view of another embodiment of the frame 100 according to the present invention. Figure 5 shows a three-dimensional side view of the carrier profile 13 used in the embodiment of Figure 4. Elements that are identical or similar to those in the embodiments of Figures 1 to 3 are denoted by the same reference numerals in Figures 4 and 5. In contrast to Figure 1, Figure 4 also shows a concrete supply container 36, a concrete line 35 connected thereto, and boom bases 37, 38 positioned on the frame 100.

[0043] Furthermore, the embodiments in Figures 4 and 5 differ in particular with respect to the connection of the connecting strut 15 and its force introduction region 17 to the carrier profile 13. In the embodiment of Figure 4, the connecting strut 15 takes the form of a circular strut connected to the carrier profile 13 via a bolt connection.

[0044] Therefore, the profile plate 21 has a tab 40 that protrudes approximately 20 cm above the cross-sectional height of the carrier profile 13, and is provided with through holes 41 for bolt connection. The tab 40 is an integral component of the profile plate 21 so that the flow of force introduced via the connecting strut 15 is directly introduced to the profile plate 21 and, therefore, to the carrier profile 13. In particular, to enable good force flow, the tab 40 has an upper edge 42 whose orientation substantially corresponds to the orientation of the connecting strut 15, and the angular deviation of the orientation is preferably less than 5°. Thus, the extent of the tab 40 along the vertical axis is maximum in the area of ​​bolt connection and decreases towards the rear end of the profile carrier 13.

Claims

1. A frame (100) for carrying a concrete distribution boom, equipped with a carrier profile (13), The carrier profile (13) has at least one force absorption region (16, 17) for absorbing the flow of force applied by the concrete distribution boom, and a force dissipation region (18) spaced apart in the longitudinal direction of the carrier profile (13) for dissipating the flow of force to the ground. The carrier profile (13) comprises at least two profile plates (20, 21) each bent along at least one bending axis (26, 27, 31) and assembled along at least two connecting lines (22, 23) to form a hollow profile. The aforementioned hollow profile is composed of two profile plates (20, 21), The hollow profile has a maximum cross-sectional width (24) and a maximum cross-sectional height (25), and the connecting lines (22, 23) are diagonally opposite each other within a virtual rectangle formed by the cross-sectional width (24) and the cross-sectional height (25). Frame.

2. The frame according to claim 1, wherein the profile plates (20, 21) have fixing openings (29) for fixing the mounting portion to the carrier profile (13).

3. The frame according to claim 2, wherein the fixing opening (29) forms a passage to the internal region of the hollow profile.

4. The profile plates (20, 21) have an access opening (28) positioned adjacent to the fixing opening (29), preferably the fixing opening is 0.3 cm ２ Having an area exceeding and / or the access opening is 100 cm ２ The frame according to claim 2 or 3, having an area exceeding the specified area.

5. The frame according to any one of claims 1 to 4, wherein the connecting lines (22, 23) and / or the bending axes (26, 27, 31) are oriented parallel to the longitudinal direction of the carrier profile (13).

6. The frame according to any one of claims 1 to 5, wherein the profile plates (20, 21) are joined together along the connection lines (22, 23) to form the hollow profile.

7. In cross-section, the profile plates (20, 21) are divided into lower portions (20a, 20b, 21a, 21b, 21c) by the bending axes (26, 27, 31), and the outer lower portions (20a, 20b, 21a, 21c) of the profile plates (20, 21) are angled to each other between 45° and 135°, as described in claim 6.

8. The frame according to claim 6 or 7, wherein, in cross-section, the profile plates (20, 21) are divided into lower portions (20a, 20b, 21a, 21b, 21c) by the bending axes (26, 27, 31), and in the region of the connecting lines (22, 23), one outer profile plate portion (20a, 20b) of the profile plate (20) is at an angle between 45° and 135° with the other adjacent outer profile plate portion (21a, 21c) of the profile plate (21).

9. The frame according to any one of claims 1 to 8, wherein one of the profile plates (21) has a lower portion (21c), the lower portion (21c) is defined by a bending axis (31), and forms the lower side of the carrier profile (13), and its width is less than the maximum cross-sectional width (24) of the hollow profile.

10. A frame according to any one of claims 1 to 9, The cross-sectional width (24) of the hollow profile is 10 cm to 45 cm. The cross-sectional height (25) of the hollow profile is between 20 cm and 90 cm. The profile plates (20, 21) are provided with overhangs (21d) that protrude beyond the connection lines (22, 23), and the range of the overhangs is from 0.5 cm to 5 cm. The frame has a boom base (14) that is positioned in the force absorption region (16, 17) and connected to the concrete distribution boom. The frame has a support system (19a, 19b), and the support system (19a, 19b) is connected to the carrier profile within the force dissipation region and is designed to introduce the force transmitted by the carrier profile to the ground. A frame characterized by having at least one of the following.

11. A frame (100) according to any one of claims 1 to 10, designed to carry a concrete distribution boom, A carrier profile (13) having at least one force absorption region (16, 17) for absorbing the force flow applied by the concrete distribution boom, In order to dissipate the flow of force into the ground, a force dissipation region (18) is provided, which is spaced apart in the longitudinal direction from the force absorption regions (16, 17), Equipped with, The carrier profile (13) is a frame having an upwardly projecting tab (40) within the force absorption region (17) for absorbing and transmitting at least a portion of the force flow.

12. The frame according to claim 11, The carrier profile (13) has at least two force-absorbing regions (16, 17) spaced apart from each other in the longitudinal direction of the carrier profile (13), and the tab (40) is positioned behind the force-absorbing region (17) in the longitudinal direction. The frame comprises a boom base (14) connected to the tab (40) by a connecting strut (15), The connection between the connecting strut (15) and the tab (40) is made by a bolt connection. The tab (40) has an upper edge (42) whose orientation having an angular deviation of less than 15° corresponds to the orientation of the connecting strut (15). The range of the tab along the vertical axis preferably decreases toward the rear end of the carrier profile (13). The tab is formed by a sheet metal part oriented substantially parallel to the longitudinal direction of the carrier profile (13). The carrier profile (13) comprises at least two profile plates (20, 21), each of which is bent along at least one bending axis (26, 27, 31) and assembled along at least two connecting lines (22, 23) to form a hollow profile, and the tab (40) is designed as one integral component of the profile plates (20, 21). A frame characterized by having at least one of the following.

13. A concrete pump having a frame according to any one of claims 1 to 12, and a concrete pump device and a concrete distribution boom connected to the frame in the force absorption regions (16, 17).

14. A method for creating a career profile, The steps include providing at least two profile plates, The steps include creating at least one fixing hole in at least one of the profile plates, The steps include bending the profile plates along the bending axis of each profile plate, The steps include assembling the profile plates to form a hollow profile, The steps include connecting the profile board along the two connection lines, Includes, The method wherein the hollow profile has a maximum cross-sectional width (24) and a maximum cross-sectional height (25), and the connecting lines (22, 23) are diagonally opposite to each other within a virtual rectangle formed by the cross-sectional width (24) and the cross-sectional height (25).

15. The method according to claim 14, wherein the profile plates are connected by welding along the connection lines.

16. The method according to claim 15, wherein the fixing holes are positioned to form passages to the internal region of the hollow profile after the profile plates (20, 21) have been assembled.

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