Abstract
An articulated boom includes a plurality of boom segments connected together via articulated joints. At least one of the boom segments includes a welded structure providing a box profile in which an upper flange and a lower flange are connected together by lateral web plates. At least one of the web plates, the upper flange, and the lower flange includes at least one reinforcing distortion.
Claims
1-16. (canceled)
17. An articulated boom comprising: a plurality of boom segments connected together via articulated joints, wherein at least one of the boom segments includes a welded structure providing a box profile in which an upper flange and a lower flange arc connected together by lateral web plates, and wherein at least one of the web plates, the upper flange, and the lower flange includes at least one reinforcing distortion.
18. The articulated boom of claim 17, wherein the reinforcing distortion is a channel-like indentation of the at least one of the web plates, the upper flange, and the lower flange which extends substantially parallel to the longitudinal axis of the boom segment.
19. The articulated boom of claim 17, wherein the reinforcing distortion is a corrugation which extends substantially parallel to the longitudinal axis of the boom segment.
20. The articulated boom of claim 19, wherein the corrugation divides the at least one of the web plates, the upper flange, and the lower flange at the ratio of between 1:5 and 1:1 when viewed in the direction transversely with. respect to the longitudinal axis of the boom segment.
21. The articulated boom of claim 19, wherein the corrugation is a semicircular corrugation, a box corrugation, a trapezoidal corrugation, or a trianguar corrugation.
22. The articulated boom of claim 19, wherein the corrugation is closed on at least one end.
23. The articulated boom of claim 19, further comprising a plate blank which is adapted to the inside contour of the corrugation and is welded to the at least one of the web plates, the upper flange, and the lower flange in the indentation which forms the corrugation.
24. The articulated boom of claim 23, wherein the plate blank encloses an acute angle of between 15 and 45° with a plane of the at least one of the web plates, the upper flange, and the lower flange.
25. The articulated boom of claim 23, wherein the plate blank closes off in a flush manner with a welded edge of the at least one of the web plates, the upper flange, and the lower flange, and wherein the welded edge extends transversely or at an angle with respect to the longitudinal axis of the boom segment.
26. The articulated boom of claim 23, wherein the plate blank is beveled, wherein at least one portion of the plate blank is in alignment with the plane of the at least one of the web plates, the upper flange, and the lower flange, and wherein the plate blank forms a corrugation outlet at a spacing from the welded edge of the at least one of the web plates, the upper flange, and the lower flange.
27. The articulated boom of claim 17, wherein the articulated boom is for a mobile concrete pump.
28. A method for producing a boom segment of an articulated boom, the method comprising: welding an upper flange and a lower flange to lateral web plates to generate a box profile; and introducing a reinforcing deformation into at least one of the web plates, the upper flange, and the lower flange prior to the welding of the upper flange and the lower flange.
29. The method of claim 28, wherein the reinforcing deformation is a corrugation which extends substantially parallel to the longitudinal axis of the boom segment.
30. The method of claim 29, wherein the corrugation is introduced over the entire length of the at least one of the web plates, the upper flange, and the lower flange as a result of bottoming or beveling.
31. The method of claim 29, further comprising adding a recess providing a corrugation outlet to at least one edge of the at least one of the web plates, the upper flange, and the lower flange prior to or after introducing the deformation.
32. The method of claim 29, further comprising welding a plate blank, which is adapted to the inside contour of the corrugation to the at least one of the web plates, the upper flange, and the lower flange in an indentation which firms the corrugation to form a corrugation outlet.
33. The method of claim 32, further comprising: machining the plate blank after welding the plate blank such that plate blank closes off in a flush manner with a welded edge of the at least one of the web plates, the upper flange, and the lower flange, wherein the welded edge extends transversely or at an angle with respect to the longitudinal axis of the boom segment.
34. The method of claim 28, wherein the articulated boom is for a mobile concrete pump.
35. An articulated boom comprising: a plurality of boom segments connected together via articulated joints, wherein at least one of the boom segments includes a welded structure providing a box profile in which an upper flange and a lower flange are connected together by lateral web plates, and wherein at least one of the web plates, the upper flange, and the lower flange includes a means for reinforcing the at least one of the web plates, the upper flange, and the lower flange.
36. The articulated boom of claim 35, wherein the articulated boom is for a mobile concrete pump.
Description
[0030] The invention and the technical environment are explained in more detail below by way of the figures. It must be pointed out that the figures show a particularly preferred realization variant of the invention. The invention, however, is not restricted to the realization variant shown. In particular, insofar as it is technically sensible, the invention includes arbitrary combinations of the technical features which are stated in the claims or are described in the description as relevant to the invention.
[0031] The figures are as follows:
[0032] FIG. 1 shows a schematic top view of a first design of a plate according to the invention,
[0033] FIG. 2 shows a schematic top view of a second design of a plate according to the invention,
[0034] FIG. 3 shows a perspective view of a design form of a plate blank according to the invention,
[0035] FIG. 4 shows a perspective view of a further embodiment of a plate according to the invention,
[0036] FIG. 5 shows a schematic side view of a third design form of a plate according to the invention,
[0037] FIG. 6 shows a cross section of a design form of a boom segment according to the invention.
[0038] FIG. 7 shows a schematic side view of a fourth design form of a plate according to the invention,
[0039] FIG. 8 shows a schematic top view of a fifth design form of a plate according to the invention,
[0040] FIG. 9 shows a schematic top view of a sixth design form of a plate according to the invention prior to the beveling,
[0041] FIG. 10 shows a schematic top view of a sixth design form of a plate according to the invention after the beveling,
[0042] FIG. 11 shows a perspective view of a sixth design form of a plate according to the invention.
[0043] FIG. 12 shows a perspective view of a seventh design form of a plate according to the invention,
[0044] FIG. 13 shows a schematic side view of a seventh design form of a plate according to the invention,
[0045] FIG. 14 shows a perspective view of an eighth design form of a plate according to the invention,
[0046] FIG. 15 shows a schematic top view of a ninth design form of a plate according to the invention,
[0047] FIG. 16 shows a schematic side view of the ninth design form of a plate according to the invention.
[0048] FIG. 1 shows a top view of a plate 10 according to the invention. The plate 10 is realized as an elongated, rectangular plate. A corrugation 12 extends in the longitudinal direction of the plate 10. The plate is reinforced per se by means of the corrugation 12. Due to the beveling radii, the reinforcement spans a large region and thus reduces the buckling field in a considerable manner. The plates 10 and consequently also the boom segments 20, which comprise the web plates according to the invention, have increased operational reliability compared to the boom segments known in the prior art.
[0049] The corrugation 12 can extend over the entire length of the plate 10. It is just as possible for the corrugation 12 only to extend over individual regions. As a result, the strength or rather the rigidity of the plate 10 can be individually adapted to the stress.
[0050] FIG. 2 shows a further embodiment of a plate 10′ according to the invention. The corrugation 12 is arranged eccentrically. The effectiveness of the corrugation 12 can be optimized in particular as a result of it comprising different forms and radii. The corrugation 12 can be realized in an advantageous manner as a semicircular corrugation, a box corrugation, a trapezoid corrugation or a triangular corrugation. The short side 14 of the plate 10 is realized at an angle in the case of the embodiment shown.
[0051] FIG. 3 shows a perspective view of a plate blank 16. In a preferred manner, the plate blank 16 is in the form of a Gaussian bell curve. As a result of such a design, the outside dimension of the plate blank 16 matches the form of the corrugation 12 to the greatest possible extent. As a result, the plate blank 16 can be welded quickly and simply onto the corrugation 12. However, the plate blank 16 can also comprise other forms. It can be realized in a trapezoidal or also parabolic manner. In a preferred manner, the plate blank 16 comprises a constant thickness.
[0052] FIG. 4 shows a perspective view of a further embodiment of a plate 10 according to the invention. The corrugation 12 reaches up to the edge 15 of the plate 10. A plate blank 16 is arranged at the end of the corrugation 12. The plate blank 16 is arranged at an angle inside the corrugation 12. It extends, in this case, in particular, from the bottom of the corrugation 12 up to the upper edge thereof. In an advantageous manner, the plate blank 16 is arranged in such a manner in the corrugation 12 that it lies by way of at least one of its edges in a plane with the plate 10 and, in addition, closes off in a flush manner with the edge 15 of the plate 10. If plates 10 realized in this manner are welded by way of their edges 15, a continuous planar welded edge is then present. A high quality welded seam can be produced as a result.
[0053] The plate blank 16 is fastened on the plate 10 or rather the corrugation 12 in a preferred manner in a substance-to-substance bond, in particular by means of a welded connection.
[0054] FIG. 5 shows a schematic side view of a further design of a plate 10 according to the invention. The corrugation 12 extends by way of at least one of its ends up to an edge 15 of the plate 10. At said end, the corrugation 12 comprises a recess 18 which extends parallel to the edge 15 of the plate 10. In order to obtain as long as possible a boom segment 20, several plates 10 are frequently arranged one behind another in a row. The connection between the individual plates is effected in a preferred manner by means of welding. As a result of the recess 18, a weld pool backing can be mounted on the edge of the plate 10. In a particularly preferred manner, the recess 18 directly adjoins the underside of the plate 10.
[0055] At the end of the plate 10 a plate blank 16 is additionally arranged at an angle in the corrugation 12. The angle between the plate blank 16 and the plate 10, in a preferred manner, is between 15° and 45°. Where the recess 18 is present, in a preferred manner the plate blank 16 is arranged in such a manner in the corrugation 12 that it does not project into the recess 18. Consequently, the weld pool backing is not impaired.
[0056] FIG. 6 shows a cross section of a design form of a boom segment 20 according to the invention. The boom segment 20 comprises a welded structure which is realized as a box profile. An upper flange 22 and a lower flange 24 are connected together by means of lateral web plates 23. The web plates 23 comprise reinforcing deformations in the form of the previously mentioned corrugations 12 which extend parallel to the longitudinal axis of the boom segment 20.
[0057] FIG. 7 shows a schematic side view of a fourth design form of a plate 10 according to the invention. The plate blank 16 is realized in a beveled manner. The plate blank 16 extends over the region b overall. In the region c, the plate blank 16 is in alignment with the plane of the plate 10. In the region a, the plate blank 16 forms the corrugation outlet 26. The corrugation outlet 26 is at a spacing from the edge 15 of the plate 10 and consequently also from a welded edge of the plate 10.
[0058] FIG. 8 shows a plate 10 according to the invention prior to introducing the deformation. The plate 10 comprises a recess 28 on each of its ends. The recess 28 is realized in such a manner that after the deformation of the plate 10 the corrugation 12 comprises a corrugation outlet. The recess 28 can be produced, for example, by means of punching-out or burning-out.
[0059] FIG. 9 shows a further embodiment of a plate 10 according to the invention prior to the beveling of the plate. The plate 10 is treated here such that the beveling does not extend over the entire length of the plate. Instead of which, two oppositely situated plate edges 29, which were spaced apart from one another prior to the beveling and after the beveling of the plate form a weld groove 30 which is shown in FIG. 10, remain at the end of the plate 10. The plate blank 16, in said embodiment, is welded perpendicularly to the plate 10 onto the end of the corrugation 12 which is formed by the beveling. The plate blank 16 can be welded into the inside of the corrugation 16, as shown in FIG. 10, or can be welded in front of the outer region of the corrugation 12 once the weld groove 30 has been closed by way of a welded seam.
[0060] FIG. 11 shows a perspective view of the plate 10 prior to the welding.
[0061] FIGS. 12 to 14 show further embodiments of the invention where, instead of the plate blank 16 for the closure of the corrugation 12, round (FIG. 12; FIG. 13) or angular (FIG. 14) hollow profiles 34, which are provided when the plate 10 is punched-out or burnt-out, are welded into an opening 32. Such types of hollow profiles can be used, for example, as supporting arms for concrete delivery pipes which are to be mounted on the boom of the concrete pump. The hollow profiles 34 can extend transversely through the boom and connect the plates 10 together. The weld groove 30, in the case of the embodiment shown here, extends longitudinally to the plate, however, it is also possible to cut the plate such that the weld groove 30 extends on one side transversely with respect to the plate edge in the region of the opening 32.
[0062] FIG. 15 and FIG. 16 show a further embodiment of the invention where a triangular or also semicircular cutout 32 is provided in conjunction with the plate edges 29 already shown in FIGS. 9-14. In the case of said embodiment, after the beveling of the plate 10, a plate blank 16 is welded onto or rather into the corrugation 12 in order to close the opening of the corrugation. The edges 29, after the beveling of the plate 10, once again form a weld groove 30 which is closed by way of a welded seam. The advantage of said exemplary embodiment compared to the exemplary embodiment according to FIG. 2 is that the plate blank 16 does not close off with the edge 15 of the plate and the edge 15 consequently has to be machined in a less expensive and time-consuming manner in order to produce a continuous, planar welded edge. Only an irregularity which is caused or is possibly caused by the welding of the welded seam 30 has to be machined in order to obtain a uniform welded edge.
[0063] It must be noted that the invention is applicable to the use of a reinforcing corrugation for the upper and lower flanges as well as for the web plates.
