EP3715557A1 - Folding mast with mast segments and method for manufacturing same - Google Patents
Folding mast with mast segments and method for manufacturing same Download PDFInfo
- Publication number
- EP3715557A1 EP3715557A1 EP20164330.1A EP20164330A EP3715557A1 EP 3715557 A1 EP3715557 A1 EP 3715557A1 EP 20164330 A EP20164330 A EP 20164330A EP 3715557 A1 EP3715557 A1 EP 3715557A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mast
- sheet metal
- metal section
- section
- articulated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims description 26
- 239000002184 metal Substances 0.000 claims abstract description 103
- 238000010276 construction Methods 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims description 25
- 238000007688 edging Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 22
- 230000007704 transition Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 5
- 208000016261 weight loss Diseases 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
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- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- IWEDIXLBFLAXBO-UHFFFAOYSA-N dicamba Chemical compound COC1=C(Cl)C=CC(Cl)=C1C(O)=O IWEDIXLBFLAXBO-UHFFFAOYSA-N 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/68—Jibs foldable or otherwise adjustable in configuration
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
Definitions
- the invention relates to an articulated mast of a large manipulator, in particular a truck-mounted concrete pump, with a plurality of mast segments connected to one another via articulated joints, at least one of the mast segments having a welded construction designed as a box profile in which an upper chord and a lower chord are connected to one another via side web plates, as well as a Method for producing a mast segment of such an articulated mast.
- Articulated masts in particular for truck-mounted concrete pumps and other types of large manipulators, are known from the prior art in a large number of configurations (see e.g. DE 196 44 410 A1 ).
- the known mast segments are made from hollow profiles. These hollow profiles are usually welded constructions in which an upper chord and a lower chord are connected to one another via lateral web plates.
- the mast segments can also be designed as a U-profile, at least in partial areas, for example at points at which a hydraulic cylinder dips into the mast segment.
- At least one of the web plates and / or the upper flange and / or the lower flange is formed by at least one sheet metal section which has at least one edge running essentially in the longitudinal direction of the mast segment, with the at least one edge ending at a distance from the end of the sheet metal section so that the end of the sheet metal section (9) is not folded, a reduction in warping of the thin-walled sheets in the mast construction of the articulated mast can be achieved in a simple manner. Because the at least one edge ends at a distance from one end or both ends of the sheet metal section, so that the end of the sheet metal section is in each case unedged, a straight transition to the following sheet metal section can be formed with the unedged end of the sheet metal section.
- the sheet metal thicknesses used can be further reduced in order to save dead weight on the mast segments and thus enable a greater reach of the articulated mast.
- the edging of the sheet metal sections forming the web plates, the upper chord or the lower chord it is possible in a simple manner to prevent distortions from forming in the welded construction, in particular after the welding process, during cooling.
- the edging running in the longitudinal direction of the mast segment effectively prevents the formation of warps during the welding process.
- the at least one edge has a simple V-shaped profile cross section.
- the simple V-shaped profile cross-section an easy-to-produce edging geometry is given, which effectively prevents the formation of warps in the sheet metal section of the mast segment provided with it.
- the cant angle of the V-shaped profile cross section should preferably be between 160 and 176 ° between the two canted sections.
- the radius of curvature of the V-shaped profile cross section is preferably relatively small.
- An embodiment is particularly preferred which provides that the at least one edge has an arcuate profile cross section.
- an arched profile cross-section a uniformly curved sheet metal contour is given, which is easy to produce and prevents the formation of warpage in the sheet metal section of the mast segment provided with it.
- the radius of the arched profile cross-section should be at least 10 cm.
- a particularly advantageous embodiment of the invention relates to the fact that the at least one edge is directed into the interior of the box profile or outwards from the box profile.
- the cross-section of the mast segment is not significantly changed either with the orientation of the edging towards the inside of the box profile or towards the outside, so that the dimensions hardly change and existing structures and attachments can also be converted to edged web or belt plates without changes.
- the sheet metal section has at least two bends running essentially in the longitudinal direction of the mast segment. With several bends running essentially in the longitudinal direction of the mast segment, the risk of warping can be further minimized, since the individual bends running in the longitudinal direction of the mast segment can be brought closer to the welded seams connecting the web plates to the upper chord and the lower chord.
- An embodiment is particularly advantageous which provides that the at least two folds are aligned converging along the longitudinal direction of the mast segment. This allows the tendency of the sheet metal sections to form distortions to be further reduced.
- the at least two edges preferably converge towards the tip of the aircraft, that is to say at the last mast segment. This makes it possible to manufacture a particularly light last mast segment in which the sheets used have less of a tendency to form warps.
- An advantageous embodiment provides that the at least two folds are each directed into the interior of the box profile or each outward from the box profile or that of the at least two folds at least one into the interior of the box profile and at least one outwards out of the box profile is directed.
- the cross-section of the mast segment is not significantly changed either with the orientation of the edging towards the inside of the box profile or towards the outside, so that the dimensions hardly change and existing structures and attachments can also be converted to edged web or belt plates without changes.
- a profile angle of the box profile in the area of the at least one edge between one of the web plates and the upper flange and / or between one of the web plates and the lower flange is between 2 and 15 degrees, preferably 4 to 10 degrees is formed offset at right angles.
- the sheet metal section which is provided with a longitudinal edge, is oriented at a special angle that offers high stability of the mast segment and at the same time reduces the formation of warpage during the welding process.
- a cant angle of approx. 5 degrees is sufficient for the crease running essentially in the longitudinal direction of the mast segment in order to achieve a corresponding effect.
- the web plate and / or the upper flange and / or the lower flange is made from at least two sheet metal sections of different thicknesses, the sheet metal sections being connected to one another by a transition, with at least the sheet metal section with the smaller thickness at least has an edge running essentially in the longitudinal direction of the mast segment.
- the use of sheet metal sections of different thickness enables a weight and stiffness-optimized design of the mast segments, with the edge running essentially in the longitudinal direction of the mast segment in the sheet metal section with the smaller thickness effectively preventing warping in this sheet metal section.
- the sheet metal sections of different thicknesses are preferably welded to one another by means of butt welding processes to form the transition.
- a particularly advantageous embodiment of the invention provides that at least the last, preferably only the last, mast segment of the articulated mast, which forms the so-called flyer, has a bend that runs essentially in the longitudinal direction of the mast segment.
- the edge running essentially in the longitudinal direction of the mast segment means that thinner metal sheets can be used without these tending to form warps during welding. Due to the relatively low moment that the aircraft has to absorb due to the end hose etc., the use of thinner metal sheets is particularly possible here, with a weight reduction on the aircraft allowing further weight reductions on the remaining mast segments, since the moment exerted by the aircraft is reduced is. In addition, the weight reduction enables the mast length to be increased.
- the invention also relates to a method for producing a mast segment of an articulated mast of a large manipulator, in particular a truck-mounted concrete pump, as described in more detail above and below.
- the method provides that a box profile is produced by welding an upper chord and a lower chord to lateral web plates, with at least one edge running essentially in the longitudinal direction of the mast segment being introduced into at least one sheet metal section of the upper chord, lower chord and / or web plates before welding is, wherein the edge ends at a distance from the end of the sheet metal section, so that the end of the sheet metal section (9) is not folded.
- the tendency of the sheet metal section to form warps, in particular after the welding process can be significantly reduced, as explained above.
- This allows sheet metal sections with a smaller thickness to be easily welded to one another to form the box profile without as the weldment cools down, distortions occur. Because the at least one bend ends at a distance from one end or both ends of the sheet metal section, so that the end of the sheet metal section is not edged, a straight transition to the following sheet metal section can easily be formed with the unedged end of the sheet metal section.
- a particularly advantageous embodiment of the method provides that the at least one edge is formed by a forming process, i.e. Die bending or folding or free bending or stamping or rolling or deep drawing or the like is introduced into the sheet metal section.
- a forming process i.e. Die bending or folding or free bending or stamping or rolling or deep drawing or the like is introduced into the sheet metal section.
- the introduction of the edging by means of one of these manufacturing processes is simple and can be implemented excellently before the upper flange, lower flange and the side web plates are welded together.
- the articulated mast 1 is built on a chassis 14 of a large manipulator 2 designed as a truck-mounted concrete pump and shown folded.
- the articulated mast 1 has a plurality of mast segments 4, 4 a connected to one another by articulated joints 3, which mast segments 4, 4 a can be unfolded for the operation of the large manipulator 2.
- the mast segments 4, 4a are box sections 5 ( Fig. 4 , 6th , 10 ) designed, manufactured as welded structures that have an upper belt 6, a lower belt 7 and two lateral web plates 8.
- the last mast segment 4a of the articulated mast 1, which forms the so-called flyer is provided with a special sheet metal section 9.
- This sheet metal section 9, which forms the web sheet 8 of the aviator 4a, has two edges 10 running essentially in the longitudinal direction of the mast segment 4a. With these edges 10 of the web plate 8, the formation of warps during the welding process is prevented.
- the web plate 8 of the last mast segment 4a is, as in Figure 1 indicated, made of two sheet metal sections 9, 12 of different thickness, which are connected to one another by a transition 13. This transition 13 is achieved by a butt welding process that connects the two sheet metal sections 9, 12 of different thicknesses to one another to form the web sheet 8.
- the edges 10 running in the longitudinal direction of the mast segment 4a are provided in this sheet metal section 9.
- the web plate 8 can also be formed from a single sheet metal section provided with one or more edges 10.
- the Figure 2 shows a detailed view of the last mast segment 4a of the articulated mast 1 according to FIG Figure 1 , wherein the mast segment 4a can be seen from below, so that the lower chord 7 is on the upper side.
- the web plate 8 of the mast segment 4a is formed from the two sheet metal sections 9, 12 of different thicknesses, which are connected to one another by means of the transition 13.
- the edges 10 running in the longitudinal direction of the mast segment 4a are only arranged in the sheet metal section 9 with the smaller thickness.
- the sheet metal section 9 with the smaller thickness forms the web sheet 8 of the last mast segment 4a, from the transition 13 arranged approximately in the center of the mast segment 4a to the end hose suspension 15 at the mast tip 16.
- the edges 10 in the sheet metal section 9 end at a distance from the end 11 of the sheet metal section 9, so that the end 11 of the thinner sheet metal section 9 is not edged and enables a simple connection in the transition 13 with the thicker sheet metal section 12 of the web plate 8.
- the two edges 10 running essentially in the longitudinal direction of the mast segment 4a are aligned converging along the longitudinal direction of the mast segment 4a, so that the edges 10 converge in the web plate 8 at the mast tip 16.
- the Figure 3 shows the front portion of the mast segment 4a according to Figure 3 , but here with a simple edging 10 in the thinner sheet metal section 9.
- the simple edging 10 in the sheet metal section 9 forming the web plate 8 runs approximately centrally, essentially in the longitudinal direction of the mast segment 4a and ends at a distance from the ends 11 of the sheet metal section 9, so that the ends 11, as can be seen, are not folded.
- the simple edging 10 shown here has a V-shaped profile cross-section, as well as from Figure 4 can be seen.
- the Figure 4 shows a sectional view through the in Figure 3 indicated section plane BB through the box profile 5 of the mast segment 4a.
- the edging 10 arranged centrally in the web plates has a V-shaped profile cross-section.
- This profile cross-section is easy to produce and effective against the formation of distortions in the sheet metal section 9 of the mast segment 4a that forms the web plate 8.
- the cant angle ⁇ of the V-shaped profile cross section is between 160 and 176 ° between the two canted sections, the cant radius of the V-shaped profile cross section being relatively small, as can be seen.
- the profile angle ⁇ of the box profile 5 in the area of the at least one edging 10 is between the web plate 8 and the upper flange 6 and between the web plate 8 and the lower flange 7 in the case of the simple edging 10 preferably between 3 and 10 degrees, to a right angle of the unedged upper chord 6 or the unedged lower chord 7.
- the shown edging 10 in the interior of the box profile 5 does not significantly change the geometry or the diameter of the mast segment and enables, for example, already constructed pipe holders to be used that lead through the mast without a structural change being necessary, since the cross section of the mast segment 4a is different Box profile 5 only slightly reduced.
- the Figure 5 shows the front portion of the mast segment according to Figure 3 with double edging 10 in the thinner sheet metal section 9.
- the double edging 10 in which the web plate 8 forms Sheet metal sections 9 run towards one another in the longitudinal direction of the mast segment 4a and converge at the mast tip 16 on the mast segment 4a.
- the edges 10 each end at a distance from the ends 11 of the sheet metal section 9, so that the ends 11, as can be seen, are not edged.
- the double edges 10 shown here have a simple V-shaped profile cross-section, as well as from Figure 6 can be seen.
- the Figure 6 forms a sectional view through the in Figure 5 indicated section plane AA through the box profile 5 of the mast segment 4a.
- the two edges 10 running essentially in the longitudinal direction of the mast segment 4a in the sheet metal sections 9 forming the web plate 8 are directed into the interior of the box section 5.
- the two edges 10 run towards one another in the longitudinal direction of the mast segment 4a and come together in the region of the mast tip 16.
- the edges 10 arranged on the web plates 8 have a V-shaped profile cross section. This profile cross-section is easy to produce and effective against the formation of distortions in the sheet metal section 9 of the mast segment 4a that forms the web plate 8.
- the radius of curvature of the V-shaped profile cross-section is relatively small.
- the profile angle ⁇ of the box profile 5 in the area of the edges 10 is between the web plate 8 and the upper flange 6 and between the web plate 8 and the lower flange 7 at the double edge 10 of the sheet metal section 9 forming the web plate 8, preferably between 2 and 15 degrees, to one Right angle from the unedged upper chord 6 or the unedged lower chord 7.
- the bends 10 shown in the interior of the box profile 5 enable pipe holders that have already been designed to be used without the need for structural changes, because the cross section of the mast segment 4a in the box profile 5 is only minimally reduced by the bends 10.
- curved profile cross-sections are also conceivable, in which the curve of the profile preferably has a constant radius.
- the folds 10 can all be introduced into the sheet metal section 9 simply before the mast segment 4a is welded by means of forming processes, for example die bending or folding or free bending or stamping or rolling or deep drawing or the like.
- FIG. 4 is a view of the end area of the portion of the mast segment 4a according to FIG Figure 5 shown in the indicated position C.
- the ends 11 of the sheet metal section 9 are not edged, that is, they are straight and continuous, so that an approximately right-angled box profile 5 is given at the end of the partial area, which has a simple transition 13 ( Fig. 2 ) to the rear part of the last mast segment 4a ( Fig. 2 ) offers.
- the Figure 8 shows a view of the web plate 8 with double edging 10, the edging 10 running essentially in the longitudinal direction of the mast segment 4a extending here to the end 11 of the sheet metal section 9.
- FIG. 9 a detailed view of a web plate 8 with a double longitudinal edge 10 is shown.
- the two edges 10, which are essentially made in the longitudinal direction, run towards each other and end at a distance from the end 11 of the sheet metal section 9.
- transverse edges 18 are made in the sheet metal section, which straighten the end 11 of the sheet metal section 9 so that the The end 11 of the sheet metal section 9 is not folded and a simple transition 10 ( Fig. 2 ) allows for unedged sheet metal sections 12. ( Fig. 2 )
- the Figure 10 shows a sectional view through the in Figure 5 Indicated section plane AA through the box section 5 of the mast segment 4a, the box section 5 here having outwardly directed edges 10.
- the two folds 10 running essentially in the longitudinal direction of the mast segment 4a in the sheet metal sections 9 forming the web plate 8 are directed out of the box profile 5 of the mast segment 4a.
- the two edges 10 run towards one another in the longitudinal direction of the mast segment 4a and come together in the region of the mast tip 16.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Lining And Supports For Tunnels (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Die Erfindung betrifft einen Knickmast (1) eines Großmanipulators (2), insbesondere einer Autobetonpumpe, mit einer Mehrzahl von über Knickgelenke (3) miteinander verbundenen Mastsegmenten (4, 4a), wobei wenigstens eines der Mastsegmente (4, 4a) eine als Kastenprofil (5) ausgebildete Schweißkonstruktion aufweist, in der ein Obergurt (6) und ein Untergurt (7) über seitliche Stegbleche (8) miteinander verbunden sind. Es ist Aufgabe der Erfindung, einen verbesserten Knickmast aus Mastsegmenten anzugeben, der durch ein geringeres Eigengewicht eine höhere Reichweite ermöglicht, und der sich gleichzeitig mit üblichen Herstellungsverfahren einfach, schnell und fehlerunanfällig fertigen lässt. Die Erfindung schlägt vor, dass wenigstens eines der Stegbleche (8) und/oder der Obergurt (6) und/oder der Untergurt (7) mindestens durch einen Blechabschnitt (9) gebildet ist, der mindestens eine im Wesentlichen in Längsrichtung des Mastsegmentes (4, 4a) verlaufende Kantung (10) aufweist, , wobei die Kantung beabstandet zum Ende des Blechabschnittes endet, sodass das Ende des Blechabschnittes (9) ungekantet ist. Außerdem betrifft die Erfindung ein Verfahren zur Herstellung eines Mastsegmentes (4, 4a) eines solchen Knickmastes (1).The invention relates to an articulated mast (1) of a large manipulator (2), in particular a truck-mounted concrete pump, with a plurality of mast segments (4, 4a) connected to one another via articulated joints (3), at least one of the mast segments (4, 4a) having a box profile ( 5) has formed welded construction in which an upper belt (6) and a lower belt (7) are connected to one another via lateral web plates (8). The object of the invention is to provide an improved articulated mast made of mast segments which, thanks to its lower dead weight, enables a greater range, and which at the same time can be produced simply, quickly and error-free using conventional production methods. The invention proposes that at least one of the web plates (8) and / or the upper chord (6) and / or the lower chord (7) is formed at least by a sheet metal section (9) which has at least one sheet metal section (9) substantially in the longitudinal direction of the mast segment (4 , 4a) has a running edge (10), wherein the edge ends at a distance from the end of the sheet metal section, so that the end of the sheet metal section (9) is not edged. The invention also relates to a method for producing a mast segment (4, 4a) of such an articulated mast (1).
Description
Die Erfindung betrifft einen Knickmast eines Großmanipulators, insbesondere einer Autobetonpumpe, mit einer Mehrzahl von über Knickgelenke miteinander verbundenen Mastsegmenten, wobei wenigstens eines der Mastsegmente eine als Kastenprofil ausgebildete Schweißkonstruktion aufweist, in der ein Obergurt und ein Untergurt über seitliche Stegbleche miteinander verbunden sind, sowie ein Verfahren zur Herstellung eines Mastsegmentes eines solchen Knickmastes.The invention relates to an articulated mast of a large manipulator, in particular a truck-mounted concrete pump, with a plurality of mast segments connected to one another via articulated joints, at least one of the mast segments having a welded construction designed as a box profile in which an upper chord and a lower chord are connected to one another via side web plates, as well as a Method for producing a mast segment of such an articulated mast.
Knickmasten, insbesondere für Autobetonpumpen und andere Arten von Großmanipulatoren, sind aus dem Stand der Technik in einer Vielzahl von Ausgestaltungen bekannt (siehe z.B.
Es ist daher Aufgabe der Erfindung, einen verbesserten Knickmast aus Mastsegmenten anzugeben, der durch ein geringeres Eigengewicht eine höhere Reichweite ermöglicht, und der sich gleichzeitig mit üblichen Herstellungsverfahren einfach, schnell und fehlerunanfällig fertigen lässt. Außerdem ist es Aufgabe der Erfindung, ein Herstellungsverfahren anzugeben, das eine vereinfachte Fertigung eines Mastsegmentes für einen solchen Knickmast ermöglicht.It is therefore the object of the invention to provide an improved articulated mast made of mast segments which, due to its lower weight, enables a greater range and which can be manufactured simply, quickly and error-free using conventional manufacturing methods. In addition, it is the object of the invention to specify a manufacturing method that enables a simplified manufacture of a mast segment for such an articulated mast.
Gelöst wird diese Aufgabe durch ein Knickmast mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren zur Herstellung eines Mastsegmentes mit den Merkmalen des Anspruchs 11.This object is achieved by an articulated mast with the features of
Dadurch, dass wenigstens eines der Stegbleche und/oder der Obergurt und/oder der Untergurt mindestens durch einen Blechabschnitt gebildet ist, der mindestens eine im Wesentlichen in Längsrichtung des Mastsegmentes verlaufende Kantung aufweist, wobei die mindestens eine Kantung beabstandet zum Ende des Blechabschnittes endet, sodass das Ende des Blechabschnittes (9) ungekantet ist, kann auf einfache Weise eine Reduzierung von Verwerfungen der dünnwandigen Bleche im Mastbau des Knickmastes erreicht werden. Dadurch, dass die mindestens eine Kantung mit Abstand von einem Ende oder beiden Enden des Blechabschnittes endet, sodass das Ende des Blechabschnittes jeweils ungekantet ist, kann mit dem ungekanteten Ende des Blechabschnittes ein gerader Übergang zu dem folgenden Blechabschnitt gebildet werden. Dies macht die Positionierung der Blechabschnitte und eine Verschweißung der Blechabschnitte zur Bildung eines Übergangs zwischen den Blechabschnitten einfacher, insbesondere bei der Verschweißung des Blechabschnittes mit Kantung mit einem ungekanteten Blechabschnitt. Damit lassen sich Übergänge zwischen den Blechabschnitten einfach im Stoßschweißverfahren herstellen.The fact that at least one of the web plates and / or the upper flange and / or the lower flange is formed by at least one sheet metal section which has at least one edge running essentially in the longitudinal direction of the mast segment, with the at least one edge ending at a distance from the end of the sheet metal section so that the end of the sheet metal section (9) is not folded, a reduction in warping of the thin-walled sheets in the mast construction of the articulated mast can be achieved in a simple manner. Because the at least one edge ends at a distance from one end or both ends of the sheet metal section, so that the end of the sheet metal section is in each case unedged, a straight transition to the following sheet metal section can be formed with the unedged end of the sheet metal section. This makes the positioning of the sheet metal sections and a welding of the sheet metal sections to form a transition between the sheet metal sections easier, in particular when welding the sheet metal section with edging with an unedged sheet metal section. This enables transitions between the sheet metal sections to be produced simply using the butt welding process.
Mit einer solchen im Wesentlichen in Längsrichtung des Mastsegments verlaufenden Kantung können die verwendeten Blechdicken weiter reduziert werden, um Eigengewicht an den Mastsegmenten einzusparen und so eine höhere Reichweite des Knickmastes zu ermöglichen. Mit der Kantung der, die Stegbleche, den Obergurt oder den Untergurt bildenden, Blechabschnitte kann auf einfache Weise verhindert werden, dass sich in der Schweißkonstruktion, insbesondere nach dem Schweißvorgang, Verwerfungen bei der Abkühlung bilden. Die in Längsrichtung des Mastsegments verlaufende Kantung verhindert wirksam die Bildung von Verwerfungen durch den Schweißvorgang.With such a bend running essentially in the longitudinal direction of the mast segment, the sheet metal thicknesses used can be further reduced in order to save dead weight on the mast segments and thus enable a greater reach of the articulated mast. With the edging of the sheet metal sections forming the web plates, the upper chord or the lower chord, it is possible in a simple manner to prevent distortions from forming in the welded construction, in particular after the welding process, during cooling. The edging running in the longitudinal direction of the mast segment effectively prevents the formation of warps during the welding process.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. Es ist darauf hinzuweisen, dass die in den Ansprüchen einzeln aufgeführten Merkmale auch in beliebiger und technologisch sinnvoller Weise miteinander kombiniert werden können und somit weitere Ausgestaltungen der Erfindung aufzeigen.Advantageous refinements and developments of the invention result from the dependent claims. It should be pointed out that the features listed individually in the claims can also be combined with one another in any desired and technologically meaningful manner and thus show further embodiments of the invention.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass die mindestens eine Kantung einen einfachen V-förmigen Profilquerschnitt aufweist. Mit dem einfachen V-förmigen Profilquerschnitt ist eine leicht herzustellende Kantungsgeometrie gegeben, die wirksam die Bildung von Verwerfungen im damit versehenen Blechabschnitt des Mastsegments verhindert. Der Kantungswinkel des V-förmigen Profilquerschnitts sollte vorzugsweise zwischen 160 und 176° zwischen den beiden Kantungsabschnitten betragen. Der Kantungsradius des V-förmigen Profilquerschnitts ist vorzugsweise relativ gering.According to an advantageous embodiment of the invention it is provided that the at least one edge has a simple V-shaped profile cross section. With the simple V-shaped profile cross-section, an easy-to-produce edging geometry is given, which effectively prevents the formation of warps in the sheet metal section of the mast segment provided with it. The cant angle of the V-shaped profile cross section should preferably be between 160 and 176 ° between the two canted sections. The radius of curvature of the V-shaped profile cross section is preferably relatively small.
Besonders bevorzugt ist eine Ausführungsform, die vorsieht, dass die mindestens eine Kantung einen bogenförmigen Profilquerschnitt aufweist. Mit einem bogenförmigen Profilquerschnitt ist eine gleichmäßig gebogene Blechkontur gegeben, die sich leicht herstellen lässt und die Bildung von Verwerfungen im damit versehenen Blechabschnitt des Mastsegments verhindert. Der Radius des bogenförmigen Profilquerschnitts sollte mindestens 10 cm betragen.An embodiment is particularly preferred which provides that the at least one edge has an arcuate profile cross section. With an arched profile cross-section, a uniformly curved sheet metal contour is given, which is easy to produce and prevents the formation of warpage in the sheet metal section of the mast segment provided with it. The radius of the arched profile cross-section should be at least 10 cm.
Eine besonders vorteilhafte Ausführung der Erfindung bezieht sich darauf, dass die mindestens eine Kantung in das Innere des Kastenprofils oder nach außen aus dem Kastenprofil heraus gerichtet ist. Weder mit der Ausrichtung der Kantung in das Innere des Kastenprofils als auch nach außen wird der Querschnitt des Mastsegmentes signifikant verändert, so dass sich die Abmessungen kaum verändern und auch vorhandene Konstruktionen und Anbauteile ohne Änderungen auf gekantete Steg- bzw. Gurtbleche umgesetzt werden können.A particularly advantageous embodiment of the invention relates to the fact that the at least one edge is directed into the interior of the box profile or outwards from the box profile. The cross-section of the mast segment is not significantly changed either with the orientation of the edging towards the inside of the box profile or towards the outside, so that the dimensions hardly change and existing structures and attachments can also be converted to edged web or belt plates without changes.
Eine vorteilhafte Ausführung der Erfindung sieht vor, dass der Blechabschnitt mindestens zwei im Wesentlichen in Längsrichtung des Mastsegmentes verlaufende Kantungen aufweist. Mit mehreren im Wesentlichen in Längsrichtung des Mastsegmentes verlaufenden Kantungen kann das Risiko von Verwerfungen weiter minimiert werden, da die einzelnen in Längsrichtung des Mastsegments verlaufenden Kantungen näher an die die Stegbleche mit dem Obergurt und dem Untergurt verbindenden Schweißnähte herangeführt werden können.An advantageous embodiment of the invention provides that the sheet metal section has at least two bends running essentially in the longitudinal direction of the mast segment. With several bends running essentially in the longitudinal direction of the mast segment, the risk of warping can be further minimized, since the individual bends running in the longitudinal direction of the mast segment can be brought closer to the welded seams connecting the web plates to the upper chord and the lower chord.
Besonders vorteilhaft ist eine Ausführungsform, die vorsieht, dass die mindestens zwei Kantungen entlang der Längsrichtung des Mastsegments aufeinander zulaufend ausgerichtet sind. Hierdurch lässt sich die Neigung der Blechabschnitte zur Bildung von Verwerfungen weiter reduzieren. Vorzugsweise laufen die mindestens zwei Kantungen zur Spitze des Fliegers, also am letzten Mastsegmentes, hin zusammen. Hierdurch lässt sich ein besonders leichtes letztes Mastsegment fertigen, bei dem die verwendeten Bleche weniger zur Bildung von Verwerfungen neigen.An embodiment is particularly advantageous which provides that the at least two folds are aligned converging along the longitudinal direction of the mast segment. This allows the tendency of the sheet metal sections to form distortions to be further reduced. The at least two edges preferably converge towards the tip of the aircraft, that is to say at the last mast segment. This makes it possible to manufacture a particularly light last mast segment in which the sheets used have less of a tendency to form warps.
Eine vorteilhafte Ausgestaltung sieht vor, dass die mindestens zwei Kantungen jeweils in das Innere des Kastenprofils oder jeweils nach außen aus dem Kastenprofil heraus gerichtet sind oder dass von den mindestens zwei Kantungen mindestens eine in das Innere des Kastenprofils und mindestens eine nach außen aus dem Kastenprofil heraus gerichtet ist. Weder mit der Ausrichtung der Kantung in das Innere des Kastenprofils als auch nach außen wird der Querschnitt des Mastsegmentes signifikant verändert, so dass sich die Abmessungen kaum verändern und auch vorhandene Konstruktionen und Anbauteile ohne Änderungen auf gekantete Steg- bzw. Gurtbleche umgesetzt werden können. Mit mindestens einer Kantung in das Innere des Kastenprofils und mindestens einer Kantung nach außen aus dem Kastenprofil heraus können komplexe Profilgeometrien mittels Kantung in die Blechabschnitte eingebracht werden, sodass sich Verwerfungen zielgerichtet reduzieren lassen.An advantageous embodiment provides that the at least two folds are each directed into the interior of the box profile or each outward from the box profile or that of the at least two folds at least one into the interior of the box profile and at least one outwards out of the box profile is directed. The cross-section of the mast segment is not significantly changed either with the orientation of the edging towards the inside of the box profile or towards the outside, so that the dimensions hardly change and existing structures and attachments can also be converted to edged web or belt plates without changes. With at least one bend into the interior of the box profile and at least one bend outwards from the box profile, complex profile geometries can be introduced into the sheet metal sections by means of bends, so that warpage can be reduced in a targeted manner.
Gemäß einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass ein Profilwinkel des Kastenprofils im Bereich der mindestens einen Kantung zwischen einem der Stegbleche und dem Obergurt und/oder zwischen einem der Stegbleche und dem Untergurt zwischen 2 und 15 Grad, vorzugsweise 4 bis 10 Grad, zu einem rechten Winkel versetzt gebildet ist. Mit dem Versatz des Profilwinkels ist der mit einer in Längsrichtung verlaufenen Kantung versehene Blechabschnitt in einem speziellen Winkel orientiert, der eine hohe Stabilität des Mastsegmentes bietet und gleichzeitig die Bildung von Verwerfungen beim Schweißvorgang reduziert. Zur wirksamen Reduzierung von Verwerfungen reicht ein Kantungswinkel von ca. 5 Grad für die im Wesentlichen in Längsrichtung des Mastsegments verlaufende Kantung bereits aus, um eine entsprechende Wirkung zu erzielen.According to a preferred embodiment of the invention, it is provided that a profile angle of the box profile in the area of the at least one edge between one of the web plates and the upper flange and / or between one of the web plates and the lower flange is between 2 and 15 degrees, preferably 4 to 10 degrees is formed offset at right angles. With the offset of the profile angle, the sheet metal section, which is provided with a longitudinal edge, is oriented at a special angle that offers high stability of the mast segment and at the same time reduces the formation of warpage during the welding process. To effectively reduce warping, a cant angle of approx. 5 degrees is sufficient for the crease running essentially in the longitudinal direction of the mast segment in order to achieve a corresponding effect.
Besonders vorteilhaft ist eine Ausführungsform, die vorsieht, dass das Stegblech und/oder der Obergurt und/oder der Untergurt aus mindestens zwei unterschiedlich dicken Blechabschnitten gefertigt ist, wobei die Blechabschnitte durch einen Übergang miteinander verbunden sind, wobei zumindest der Blechabschnitt mit der geringeren Dicke mindestens eine im Wesentlichen in Längsrichtung des Mastsegmentes verlaufende Kantung aufweist. Die Verwendung von unterschiedlich dicken Blechabschnitten ermöglicht eine gewichts- und steifigkeitsoptimierte Ausgestaltung der Mastsegmente, wobei die im Wesentlichen in Längsrichtung des Mastsegmentes verlaufende Kantung in dem Blechabschnitt mit der geringeren Dicke wirksam Verwerfungen in diesem Blechabschnitt verhindert. Die Blechabschnitte unterschiedlicher Dicke sind vorzugsweise mittels Stoßschweißverfahren zur Bildung des Überganges miteinander verschweißt.Particularly advantageous is an embodiment that provides that the web plate and / or the upper flange and / or the lower flange is made from at least two sheet metal sections of different thicknesses, the sheet metal sections being connected to one another by a transition, with at least the sheet metal section with the smaller thickness at least has an edge running essentially in the longitudinal direction of the mast segment. The use of sheet metal sections of different thickness enables a weight and stiffness-optimized design of the mast segments, with the edge running essentially in the longitudinal direction of the mast segment in the sheet metal section with the smaller thickness effectively preventing warping in this sheet metal section. The sheet metal sections of different thicknesses are preferably welded to one another by means of butt welding processes to form the transition.
Eine besonders vorteilhafte Ausführung der Erfindung sieht vor, dass zumindest das letzte, vorzugsweise nur das letzte, den sogenannten Flieger bildende Mastsegment des Knickmastes eine im Wesentlichen in Längsrichtung des Mastsegmentes verlaufende Kantung aufweist. Insbesondere bei der Konstruktion des Fliegers können durch die im Wesentlichen in Längsrichtung des Mastsegmentes verlaufende Kantung dünnere Bleche verwendet werden, ohne dass diese beim Verschweißen zur Bildung von Verwerfungen neigen. Aufgrund des relativ geringen Momentes, dass von dem Flieger aufgrund des Endschlauches etc. aufgenommen werden muss, ist die Verwendung von dünneren Blechen hier besonders gut möglich, wobei eine Gewichtsreduzierung am Flieger weitere Gewichtsreduzierungen an den restlichen Mastsegmenten gestattet, da das vom Flieger ausgeübte Moment reduziert ist. Außerdem ermöglicht die Gewichtsreduktion eine Vergrößerung der Mastlänge.A particularly advantageous embodiment of the invention provides that at least the last, preferably only the last, mast segment of the articulated mast, which forms the so-called flyer, has a bend that runs essentially in the longitudinal direction of the mast segment. Particularly in the construction of the aircraft, the edge running essentially in the longitudinal direction of the mast segment means that thinner metal sheets can be used without these tending to form warps during welding. Due to the relatively low moment that the aircraft has to absorb due to the end hose etc., the use of thinner metal sheets is particularly possible here, with a weight reduction on the aircraft allowing further weight reductions on the remaining mast segments, since the moment exerted by the aircraft is reduced is. In addition, the weight reduction enables the mast length to be increased.
Ferner ist Gegenstand der Erfindung ein Verfahren zur Herstellung eines Mastsegmentes eines wie zuvor und im Folgenden näher beschriebenen Knickmastes eines Großmanipulators, insbesondere einer Autobetonpumpe. Das Verfahren sieht vor, dass ein Kastenprofil erzeugt wird, indem ein Obergurt und ein Untergurt mit seitlichen Stegblechen verschweißt werden, wobei vor dem Verschweißen in mindestens einen Blechabschnitt von Obergurt, Untergurt und/oder Stegblechen mindestens eine im Wesentlichen in Längsrichtung des Mastsegmentes verlaufende Kantung eingebracht wird, wobei die Kantung beabstandet zum Ende des Blechabschnittes endet, sodass das Ende des Blechabschnittes (9) ungekantet ist.The invention also relates to a method for producing a mast segment of an articulated mast of a large manipulator, in particular a truck-mounted concrete pump, as described in more detail above and below. The method provides that a box profile is produced by welding an upper chord and a lower chord to lateral web plates, with at least one edge running essentially in the longitudinal direction of the mast segment being introduced into at least one sheet metal section of the upper chord, lower chord and / or web plates before welding is, wherein the edge ends at a distance from the end of the sheet metal section, so that the end of the sheet metal section (9) is not folded.
Mit dem Einbringen der im Wesentlichen in Längsrichtung verlaufenen Kantung in dem Blechabschnitt kann die Neigung des Blechabschnittes zur Bildung von Verwerfungen, insbesondere nach dem Schweißvorgang, deutlich reduziert werden, wie oben erläutert. Damit lassen sich Blechabschnitte mit einer geringeren Dicke einfach zur Bildung des Kastenprofils miteinander verschweißen, ohne dass mit der Abkühlung der Schweißkonstruktion Verwerfungen auftreten. Dadurch, dass die mindestens eine Kantung mit Abstand von einem Ende oder beiden Enden des Blechabschnittes endet, sodass das Ende des Blechabschnittes jeweils ungekantet ist, kann mit dem ungekanteten Ende des Blechabschnittes einfach ein gerader Übergang zu dem folgenden Blechabschnitt gebildet werden.With the introduction of the edge running essentially in the longitudinal direction in the sheet metal section, the tendency of the sheet metal section to form warps, in particular after the welding process, can be significantly reduced, as explained above. This allows sheet metal sections with a smaller thickness to be easily welded to one another to form the box profile without as the weldment cools down, distortions occur. Because the at least one bend ends at a distance from one end or both ends of the sheet metal section, so that the end of the sheet metal section is not edged, a straight transition to the following sheet metal section can easily be formed with the unedged end of the sheet metal section.
Eine besonders vorteilhafte Ausführung des Verfahrens sieht vor, dass die mindestens eine Kantung durch ein Umformverfahren, d.h. Gesenkbiegen oder Abkanten oder Freibiegen oder Prägen oder Walzen oder Tiefziehen oder Ähnliches in den Blechabschnitt eingebracht wird. Die Einbringung der Kantung mittels eines dieser Herstellungsverfahren ist einfach und lässt sich hervorragend vor dem Verschweißen von Obergurt, Untergurt und den seitlichen Stegblechen realisieren. Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aufgrund der nachfolgenden Beschreibung sowie anhand der Zeichnungen, die Ausführungsbeispiele der Erfindung zeigen. Einander entsprechende Gegenstände oder Elemente sind in allen Figuren mit den gleichen Bezugszeichen versehen.A particularly advantageous embodiment of the method provides that the at least one edge is formed by a forming process, i.e. Die bending or folding or free bending or stamping or rolling or deep drawing or the like is introduced into the sheet metal section. The introduction of the edging by means of one of these manufacturing processes is simple and can be implemented excellently before the upper flange, lower flange and the side web plates are welded together. Further features, details and advantages of the invention emerge on the basis of the following description and on the basis of the drawings which show exemplary embodiments of the invention. Objects or elements that correspond to one another are provided with the same reference symbols in all figures.
Es zeigen:
Figur 1- einen Großmanipulator mit erfindungsgemäßem Knickmast,
Figur 2- ein Mastsegment des Kickmastes,
Figur 3- einen Teilbereich des Mastsegmentes mit einfacher Kantung,
Figur 4- ein Kastenprofil bei einfacher Kantung,
Figur 5- einen Teilbereich des Mastsegmentes mit doppelter Kantung,
Figur 6- ein Kastenprofil bei doppelter Kantung,
Figur 7- einen Endbereich des Mastsegmentes,
Figur 8- ein Stegblech mit doppelter Kantung,
Figur 9- ein Stegblech mit doppelter Längskantung und Querkantung und
Figur 10- ein Kastenprofil mit nach außen gerichteten Kantungen.
- Figure 1
- a large manipulator with an inventive articulated mast,
- Figure 2
- a mast segment of the kick mast,
- Figure 3
- a part of the mast segment with a single edge,
- Figure 4
- a box profile with a single edge,
- Figure 5
- a part of the mast segment with double edging,
- Figure 6
- a box profile with double edging,
- Figure 7
- one end of the mast segment,
- Figure 8
- a web plate with double edging,
- Figure 9
- a web plate with double longitudinal edge and transverse edge and
- Figure 10
- a box profile with outward-facing edges.
In der
Die
Die
Die
Die
Die
In der
Die
In
Die
- 11
- KnickmastArticulated mast
- 22
- GroßmanipulatorLarge manipulator
- 33
- KnickgelenkArticulated joint
- 44th
- 4a Mastsegment4a mast segment
- 55
- KastenprofilBox profile
- 66
- ObergurtTop chord
- 77th
- UntergurtLower chord
- 88th
- StegblechWeb plate
- 99
- Blechabschnitt (dünn)Sheet metal section (thin)
- 1010
- KantungEdging
- 1111
- EndeThe End
- 1212th
- Blechabschnitt (dick)Sheet metal section (thick)
- 1313
- Übergangcrossing
- 1414th
- Fahrgestellchassis
- 1515th
- EndschlauchaufhängungEnd hose suspension
- 1616
- MastspitzeMast top
- 1717th
- EndschlauchEnd hose
- 1818th
- QuerkantungTransverse edge
Claims (12)
dass wenigstens eines der Stegbleche (8) und/oder der Obergurt (6) und/oder der Untergurt (7) mindestens durch einen Blechabschnitt (9) gebildet ist, der mindestens eine im Wesentlichen in Längsrichtung des Mastsegmentes (4, 4a) verlaufende Kantung (10) aufweist wobei die mindestens eine Kantung (10) beabstandet zum Ende (11) des Blechabschnittes (9) endet, sodass das Ende (11) des Blechabschnittes (9) ungekantet ist.Articulated mast (1) of a large manipulator (2), in particular a truck-mounted concrete pump, with a plurality of mast segments (4, 4a) connected to one another via articulated joints (3), at least one of the mast segments (4, 4a) being a welded construction designed as a box profile (5) has, in which an upper belt (6) and a lower belt (7) are connected to one another via lateral web plates (8), characterized in that
that at least one of the web plates (8) and / or the upper chord (6) and / or the lower chord (7) is formed by at least one sheet metal section (9) which has at least one edge running essentially in the longitudinal direction of the mast segment (4, 4a) (10) wherein the at least one edging (10) ends at a distance from the end (11) of the sheet metal section (9) so that the end (11) of the sheet metal section (9) is not edged.
dass vordem Verschweißen von Obergurt (6), Untergurt (7) und Stegblechen (8), in mindestens einen Blechabschnitt (9) von Obergurt (6), Untergurt (7) und/oder Stegblechen (8) mindestens eine im Wesentlichen in Längsrichtung des Mastsegmentes (4, 4a) verlaufende Kantung (10) eingebracht wird wobei die Kantung (10) beabstandet zum Ende (11) des Blechabschnittes (9) endet, sodass das Ende (11) des Blechabschnittes (9) ungekantet ist.A method for producing a mast segment (4, 4a) of an articulated mast (1) of a large manipulator (2), in particular a truck-mounted concrete pump, a box profile (5) being produced by an upper flange (6) and a lower flange (7) with lateral web plates ( 8) are welded, characterized in that
that prior to welding of the upper chord (6), lower chord (7) and web plates (8), in at least one sheet metal section (9) of the upper chord (6), lower chord (7) and / or web plates (8) at least one essentially in the longitudinal direction of the Mast segment (4, 4a) extending edge (10) is introduced wherein the edge (10) ends at a distance from the end (11) of the sheet metal section (9), so that the end (11) of the sheet metal section (9) is not edged.
Applications Claiming Priority (1)
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DE102019107456.8A DE102019107456A1 (en) | 2019-03-22 | 2019-03-22 | Articulated mast with mast segments and method for producing a mast segment |
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EP3715557A1 true EP3715557A1 (en) | 2020-09-30 |
EP3715557B1 EP3715557B1 (en) | 2024-07-10 |
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EP20164330.1A Active EP3715557B1 (en) | 2019-03-22 | 2020-03-19 | Folding mast with mast segments and method for manufacturing same |
Country Status (4)
Country | Link |
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US (1) | US11447967B2 (en) |
EP (1) | EP3715557B1 (en) |
KR (1) | KR20200113175A (en) |
DE (1) | DE102019107456A1 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102017208031A1 (en) * | 2017-05-12 | 2018-11-15 | Putzmeister Engineering Gmbh | Cranked boom with variable cross-section for mobile concrete pumps |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985234A (en) * | 1973-12-20 | 1976-10-12 | Creusot-Loire | Telescopic boom for a crane |
DE19644410A1 (en) | 1996-10-25 | 1998-04-30 | Putzmeister Ag | Concrete placing boom for concrete pumps |
EP0922664A2 (en) * | 1997-12-12 | 1999-06-16 | Grove U.S. LLC | Telescopic jib bearing assembly with embossments |
JP2001081810A (en) * | 1999-09-13 | 2001-03-27 | Kubota Corp | Boom of working machine |
EP2141289A1 (en) * | 2007-04-25 | 2010-01-06 | Komatsu Ltd | Work machine boom |
US20170254101A1 (en) * | 2014-08-27 | 2017-09-07 | Schwing Gmbh | Articulated boom |
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US4038794A (en) * | 1975-10-28 | 1977-08-02 | The Warner & Swasey Company | Boom assembly |
WO2002064485A2 (en) * | 2001-02-12 | 2002-08-22 | Vm Kraner Aps | A system for handling preferably elongated objects |
US6499612B1 (en) * | 2001-07-27 | 2002-12-31 | Link-Belt Construction Equipment Co., L.P., Lllp | Telescoping boom assembly with rounded profile sections and interchangeable wear pads |
PL1510643T3 (en) * | 2003-09-01 | 2018-06-29 | Forster Profilsysteme Ag | Profile and method of its manufacture |
JP4695355B2 (en) * | 2004-07-15 | 2011-06-08 | 新日本製鐵株式会社 | Boom / arm member for construction machine with excellent weld fatigue strength and method for manufacturing the same |
US9290363B2 (en) * | 2011-07-21 | 2016-03-22 | Manitowoc Crane Companies, Llc | Tailor welded panel beam for construction machine and method of manufacturing |
US9592999B2 (en) * | 2011-09-20 | 2017-03-14 | Deere & Company | Boom apparatus with nose body |
DE102017223240A1 (en) * | 2017-12-19 | 2019-06-19 | Putzmeister Engineering Gmbh | Concrete pump mast arm segment with longitudinally variable plate thickness and method of making such a concrete pump mast arm segment |
-
2019
- 2019-03-22 DE DE102019107456.8A patent/DE102019107456A1/en active Pending
-
2020
- 2020-03-19 EP EP20164330.1A patent/EP3715557B1/en active Active
- 2020-03-20 US US16/825,700 patent/US11447967B2/en active Active
- 2020-03-23 KR KR1020200034910A patent/KR20200113175A/en not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985234A (en) * | 1973-12-20 | 1976-10-12 | Creusot-Loire | Telescopic boom for a crane |
DE19644410A1 (en) | 1996-10-25 | 1998-04-30 | Putzmeister Ag | Concrete placing boom for concrete pumps |
EP0922664A2 (en) * | 1997-12-12 | 1999-06-16 | Grove U.S. LLC | Telescopic jib bearing assembly with embossments |
JP2001081810A (en) * | 1999-09-13 | 2001-03-27 | Kubota Corp | Boom of working machine |
EP2141289A1 (en) * | 2007-04-25 | 2010-01-06 | Komatsu Ltd | Work machine boom |
US20170254101A1 (en) * | 2014-08-27 | 2017-09-07 | Schwing Gmbh | Articulated boom |
Also Published As
Publication number | Publication date |
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US20200298298A1 (en) | 2020-09-24 |
KR20200113175A (en) | 2020-10-06 |
US11447967B2 (en) | 2022-09-20 |
DE102019107456A1 (en) | 2020-09-24 |
EP3715557B1 (en) | 2024-07-10 |
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