EP3697982B1 - Double-walled boom segment - Google Patents
Double-walled boom segment Download PDFInfo
- Publication number
- EP3697982B1 EP3697982B1 EP18799678.0A EP18799678A EP3697982B1 EP 3697982 B1 EP3697982 B1 EP 3697982B1 EP 18799678 A EP18799678 A EP 18799678A EP 3697982 B1 EP3697982 B1 EP 3697982B1
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- EP
- European Patent Office
- Prior art keywords
- mast
- mast segment
- reinforcement
- boxes
- segment
- 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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- 230000002787 reinforcement Effects 0.000 claims description 50
- 238000007654 immersion Methods 0.000 description 24
- 230000003014 reinforcing effect Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
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- 238000005260 corrosion Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013589 supplement 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
-
- 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
-
- 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
- E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
Definitions
- the invention relates to a mast segment with an upper chord, a lower chord and two lateral web plates, wherein the web plates, together with the upper chord, the lower chord and reinforcement plates laterally spaced from the web plates, form stiffening boxes located on the sides of the mast segment.
- the invention also relates to an articulated mast with such a mast segment and a large manipulator with such an articulated mast.
- JP S58 63255 U a mast segment of the above-mentioned type is disclosed.
- the JP 2010 112094 A relates to a mast segment with an upper chord, a lower chord and two lateral web plates, whereby an immersion area for a hydraulic cylinder is provided in the mast segment.
- JP 2005 090134 A A mast segment with an upper chord, a lower chord and two web plates is also known.
- a large manipulator with an articulated mast is known.
- the invention relates in particular to such a large manipulator with a built-on concrete pump, whereby the articulated mast serves as a distribution mast, which carries a concrete delivery line in order to distribute the concrete delivered by the concrete pump.
- powerful vehicles of the type in question here must be equipped with widely extending articulated masts.
- the necessary ranges of the articulated mast require its division into mast segments with articulated joints, which allow the Articulated masts for driving operations.
- Such articulated masts reach considerable heights and trigger a moment that depends on the radius, the length and weight of the mast, but also on the wind conditions prevailing at the installation site. When designing such articulated masts, these conditions must be taken into account and the mast segments of such an articulated mast must be sufficiently rigid and yet as light as possible.
- the mast segments of such articulated masts are usually made up of two web plates arranged on the side, as well as an upper and lower chord.
- the mast segments of such an articulated mast are usually pivoted against each other by hydraulic cylinders, with the hydraulic cylinders lying between the mast segments of the articulated mast when folded in.
- this design principle is problematic for long masts.
- the development of large manipulators is subject to the need to provide for ever-increasing mast lengths and ranges due to growing requirements, while maintaining the vehicle profile for driving operation. With mobile truck-mounted concrete pumps, it is also important not to exceed the permissible vehicle height in order to avoid restrictions for special transport that are required when a vehicle is too high.
- Folding long articulated masts in particular makes it necessary to immerse the hydraulic cylinders in the mast segments.
- Particularly long articulated masts also require particularly large hydraulic cylinders.
- the immersion areas in which the hydraulic cylinders penetrate the mast segments weaken the mast segments and lead to a lower torsional rigidity, which may no longer be sufficient, especially with long masts.
- simply increasing the sheet thickness in these areas is not possible because certain weight limits for trucks must also be observed and heavier masts result in further weight increases on the substructure of the machine in order to ensure the stability of the machine.
- an improved, lightweight and yet particularly torsionally rigid mast segment is to be specified, which also enables a compact folding of an articulated mast equipped with it.
- an articulated mast with such a mast segment is to be provided, as well as a large manipulator with such an articulated mast.
- the lateral stiffening boxes strengthen the mast segment and lead to a higher torsional stiffness of the mast segment without increasing the weight excessively.
- the structure of the lateral stiffening boxes supplements the structure of the mast segment and forms an additional part of the mast segment.
- the stiffening boxes arranged on the sides of the mast segment are simply formed from the upper chord, the lower chord, the web plates and reinforcement plates spaced laterally from the web plates.
- the stiffening boxes extend at least partially along the mast segment.
- the mast segments can be reinforced in specific areas and thus the torsional stiffness of the mast segment can be increased.
- the only Reinforcing the mast segment in certain areas leads to only a slight increase in the weight of the mast segment while significantly increasing torsional rigidity, since particularly weakened mast segment sections can be reinforced in certain areas.
- a longitudinally extending central chord is arranged within the mast segment, which together with the web plates and the upper chord or the lower chord forms a further stiffening box.
- This third stiffening box is preferably located between the two stiffening plates formed by the web and reinforcement plates and thus further increases the torsional stiffness of the mast segment.
- a particular advantage is that the web plates and reinforcement plates forming the stiffening boxes are each joined together in a connection area, thus closing off the extension area of the stiffening boxes.
- the extension area formed by the stiffening boxes can be closed off at a specific point along the mast segment, and from this point on the mast changes to the conventional design with two side web plates and an upper and lower chord.
- the stiffening boxes are closed off in the connection area by joining the web and reinforcement plates together, so that no water or similar can penetrate and thus lead to corrosion inside the stiffening boxes.
- the embodiment in which the stiffening boxes extend at least partially along an immersion area for a hydraulic cylinder is particularly advantageous.
- the immersion area of the hydraulic cylinder usually weakens the mast segment, so that reinforcement by the stiffening boxes have a particularly effective effect on the torsional stiffness of the mast segment.
- a particularly advantageous embodiment of the invention provides that the extension area of the stiffening boxes along the mast segment is limited to an area around the connection of the hydraulic cylinder. Particularly in the area of the connection of the hydraulic cylinders to the mast segments, the possibility of the usual torsionally rigid construction of a box profile with side web plates and upper and lower chords is only possible to a limited extent or not at all, so that reinforcement with laterally arranged stiffening boxes in the area of the connection of the hydraulic cylinders or associated lever gears is particularly effective for increasing the torsional rigidity of the mast segment.
- At least one bulkhead is provided between the stiffening boxes, arranged at right angles to the stiffening boxes, which delimits the immersion area of the hydraulic cylinder between the stiffening boxes.
- the stiffening boxes extend into the area of an articulated joint arranged at one end of the mast segment.
- the continuation of the stiffening boxes into the area of an articulated joint has the advantage that the support of the articulated joint is reinforced and thus offers greater torsional rigidity.
- stiffening boxes extend from the end of the mast segment to half the length of the mast segment. To achieve sufficiently high torsional rigidity, it is sufficient to extend the stiffening boxes from the end of the mast segment to about half the length of the mast segment. This regional reinforcement by the stiffening boxes has a particularly large effect on the torsional rigidity of the mast segment.
- a particularly advantageous embodiment of the invention provides that the stiffening boxes each have a recess, wherein the recess a hollow structure formed between the stiffening boxes connects the stiffening boxes.
- weight can be saved on the mast segment in a targeted manner.
- the hollow structure of the mast segment is connected to the hollow structure of the stiffening box via the recess, a closed mast segment is still provided that is less susceptible to corrosion from the inside.
- the recesses in the web plates can be arranged in targeted areas of the stiffening boxes where the stiffening boxes play a rather minor role in the torsional stiffness and stability of the mast segment as a whole.
- the web plates and the reinforcement plates run towards each other in the connection areas, i.e. the plates run towards each other at an acute angle, for example, and are then connected to each other in the connection area. This makes the flow of force in the connection area from the reinforcement plate to the web plate smoother and achieves a lower notch effect on the web plate.
- the invention further relates to an articulated mast with a plurality of mast segments, the mast segments being pivotable at articulated joints about articulated axes relative to an adjacent mast segment or a pivoting bolster, with at least one mast segment already described and described in more detail below.
- a mast segment enables large ranges on an articulated mast with a sufficiently high torsional rigidity of the mast segment.
- the first mast segment arranged on the pivoting bolster is preferably equipped with corresponding stiffening boxes (as described above and below).
- the hydraulic cylinder which enables pivoting between the first mast segment and the pivoting bolster, is particularly large and requires a large immersion area, which reduces the torsional rigidity of the mast segment.
- the proposed stiffening boxes are therefore particularly effective on this mast segment in particular.
- the invention relates to a large manipulator, in particular a truck-mounted concrete pump, with a turntable rotatable about a vertical axis with Especially with such large manipulators, light and torsion-resistant mast segments and articulated masts are of particular importance in order to be able to meet the increasing requirements in terms of reach and height.
- a mast segment 1 according to the invention is shown with the reference number 1.
- the reference number 50 designates an articulated mast 50 according to the invention.
- the reference number 100 designates a large manipulator 100 according to the invention.
- the Figure 1 The large manipulator 100 shown is a truck-mounted concrete pump.
- the large manipulator 100 has a turntable 102 which is arranged on the vehicle frame of the large manipulator 100 so that it can rotate about a vertical axis 101.
- a folded articulated mast 50 is shown mounted on the turntable 102.
- the three visible mast segments 1, 1a, 1b can each be pivoted about articulated axes relative to the adjacent mast segment 1, 1a, 1b or the turntable 102 via articulated joints 51, 51a, 51b.
- hydraulic cylinders 52, 52a are arranged between the turntable 102 and the first mast segment 1 as well as between the mast segments 1, 1a, 1b, which allow the mast segments 1, 1a, 1b to be pivoted against each other and the first mast segment 1 relative to the turntable 102 via lever gears.
- the illustration of a concrete delivery line which is guided with corresponding holding elements to the side of the mast segments 1, 1a, 1b has been omitted.
- the mast segments 1, 1a, 1b are formed by an upper chord 2 and a lower chord 3 as well as two lateral web plates 4, 5, whereby the plates 2, 3, 4, 5 are welded together at the edges to form a box.
- the first mast segment 1 has web plates 4, 5, which together with the upper flange 2, the lower flange 3 and the reinforcement plates 7, 8 spaced laterally from the web plates 4, 5 form stiffening boxes 9, 10 located laterally on the mast segment 1.
- the stiffening box 10 is visible together with a connection area 19 in which the reinforcement plate 8 is joined to the web plate 5.
- an articulated mast 50 according to the invention is shown in the unfolded position.
- the hydraulic cylinder 52 has pivoted the first mast segment 1 relative to the turntable 102 in such a way that the immersion area 11 for the hydraulic cylinder 52 can be seen in the first mast segment 1.
- the reinforcing plates 7, 8 are arranged on the side of the mast segment and are spaced apart from the web plates 4, 5, which form stiffening boxes 9, 10 on each side of the mast segment 1 in the area of the connection 12 of the hydraulic cylinder 52.
- the reinforcing plate 7 and the web plate 4 run towards each other and are joined together there.
- the Figure 3 shows a schematic view of another embodiment of the articulated mast 50.
- the articulated mast 50 is shown here from the perspective of the vertical axis 101.
- the mast segment 1 of the articulated mast 50 shown is formed from an upper chord 2 and a lower chord 3 as well as web plates 4, 5, as can also be seen from the sectional views AA, BB and CC.
- Laterally spaced-apart reinforcement plates 7, 8 are arranged next to the web plates 4, 5, which form stiffening boxes 9, 10 with the web plates 4, 5 and the upper chord 2 and the lower chord 3. This is particularly evident in sectional view CC.
- the stiffening boxes 9, 10 reinforce the mast segment 1 and thereby generate greater torsional rigidity.
- sectional view AA which shows the immersed hydraulic cylinder 52 in a schematic sectional view.
- the web plates 4, 5 of the mast segment 1 shown here run parallel to each other, like the reinforcement plates 7, 8, and thus form the stiffening boxes 9, 10.
- the upper chord 2 and the lower chord 3 are continued over the stiffening boxes 9, 10 and end with the reinforcement plates 7, 8, with which both the upper chord 2 and the lower flange 3 are welded.
- the stiffening boxes 9, 10 only extend in some areas along the web plates 4, 5.
- the reinforcing plates 7, 8 are joined to the web plates 4, 5 at the tip of the mast segment 1 in a connection area 18, 19. In particular in the area of the hydraulic cylinder 52, reinforcement by the stiffening boxes 9, 10 on the mast segment 1 is provided.
- a further mast segment 1 emerges, which is formed from an upper chord 2 and a lower chord 3 as well as two lateral web plates 4, 5.
- the web plates 4, 5 further form two stiffening boxes 9, 10 on the side of the mast segment 1 with laterally spaced reinforcement plates 7, 8 and with the upper and lower chords 2, 3.
- These stiffening boxes 9, 10 extend at least partially along the mast segment 1.
- the stiffening boxes 9, 10 formed on the mast segment 1 make the mast segment 1 particularly strong in the immersion area 11 for a hydraulic cylinder 52 ( Fig.6 ) reinforced. This immersion area 11 for the hydraulic cylinder 52 ( Fig.6 ) is located between the web plates 4, 5.
- the stiffening boxes 9, 10 extend around this immersion area 11 and stiffen the mast segment 1 in this area.
- a first part of an articulated joint 51a is formed on a mast segment end 14, with a receptacle 15 for a second part of the articulated joint 51a of another mast segment 1a ( Fig.6 ).
- the lower flange 3 is brought up to the reinforcing plates 7, 8 in the area of the stiffening boxes 9, 10 and is welded to these to form the stiffening boxes 9, 10.
- the Figure 5 shows another version of a mast segment 1.
- the stiffening boxes 9, 10 extend along the web plates 4, 5 to an area around the connection 12 of the hydraulic cylinder 52 ( Fig.6 ) and the connection 12a of the hydraulic cylinder 52a.
- the reinforcement plates 7, 8 and the web plates 4, 5 together with the stiffening boxes 9, 10 formed from the upper flange 2 and the lower flange 3 have a particularly high effect on increasing the Torsional stiffness of the mast segment 1.
- the stiffening boxes 9, 10 shown here extend at least partially along the immersion area 11 for the hydraulic cylinder 52 ( Fig.6 ).
- the stiffening boxes 9, 10 extend from one mast segment end 14 to approximately half the length of the mast segment 1. This particularly strengthens the area around the connection 12, 12a for the hydraulic cylinders 52, 52a ( Fig.6 ) and the part of the mast segment 1 which is surrounded by the immersion area 11 for the hydraulic cylinder 52 ( Fig.6 ) is particularly weakened. This makes it possible to produce a torsionally rigid yet lightweight mast segment 1, which is particularly suitable for long ranges of the articulated mast 50.
- a 50 articulated mast with mast segment 1 is Figure 5 in folded position in a view from below.
- the mast segment 1 is arranged so that it can pivot relative to the turntable 102.
- a hydraulic cylinder 52 is connected between the turntable 102 and the mast segment 1.
- an articulated joint 51a is provided, which receives a second mast segment 1a in a receptacle 15. This second mast segment 1a can be pivoted relative to the first mast segment 1 by a further hydraulic cylinder 52a.
- the laterally spaced reinforcement plates 7, 8, which extend along the web plates 4, 5 extend and together with the web plates 4, 5 and the upper chord 2 and the lower chord 3 form the stiffening boxes 9, 10, are limited to an area around the connection 12 of the hydraulic cylinders 52, 52a.
- the stiffening boxes 9, 10 thus extend at least in some areas along the immersion area 11 of the first hydraulic cylinder 52 and in the area of the connection of the second hydraulic cylinder 52a. This results in a particularly stable but nevertheless lightweight articulated mast 50.
- FIG 7 is a mast segment 1 according to Figure 5 shown.
- part of the lower flange 3 is removed, which allows a view into a hollow structure 6 of the mast segment 1 and the stiffening boxes 9, 10 arranged thereon.
- the web plates 4, 5 are continuous along the mast segment 1.
- reinforcing plates 7, 8 are arranged at a distance from the web plates 4, 5.
- the stiffening boxes 9, 10 extend into the area up to an articulated joint 51a arranged at a mast segment end 14.
- the stiffening boxes 9, 10 form a first part of the articulated joint 51a, with a receptacle 15 for a second part of the articulated joint 51a of another mast segment 1b ( Fig.6 ) is provided.
- a bulkhead 13 is provided between the web plates 4, 5, which separates the hollow structure 6 from the immersion area 11 for the hydraulic cylinder 52 ( Fig.6 ).
- This bulkhead 13, which runs transversely to the extension of the mast segment 1, increases the torsional rigidity and seals off the hollow structure 6 from the environment, which prevents corrosion in the hollow structure 6 inside the mast segment 1.
- FIG. 7 Also visible are recesses 16, 17, which are provided in the web plates 4, 5, whereby these recesses 16, 17 connect the hollow structure 6 with the stiffening boxes 9, 10.
- weight can be saved significantly.
- the contribution of the web plates 4, 5 to the torsional stiffness is of secondary importance, but it cannot be completely dispensed with in this area.
- section AA shows the Figure 9 Particularly clearly visible are three stiffening boxes 9, 10, 21 in the immersion area 11 of the hydraulic cylinder 52, which are formed by the upper and lower chords 2, 3, the web plates 4, 5, the reinforcing plates 7, 8 and the central chord 20. This results in a very torsionally rigid construction in the immersion area 11 of the hydraulic cylinder.
- the Figure 10 shows a sectional view through the mast segment 1 according to Figure 5 .
- the reinforcement plates 7, 8 spaced apart to the sides of the web plates 4, 5 form, together with the upper flange 2 and the lower flange 3, stiffening boxes 9, 10 located on the sides of the mast segment 1.
- the stiffening boxes 9, 10 shown here reinforce the mast segment 1 in certain areas from the outside. They extend from a mast segment end 14 to approximately half the mast segment length and enclose the area around the connection 12 of the hydraulic cylinders and extend at least in some areas along the immersion area 11 for a hydraulic cylinder 52.
- the Figure 11 shows a detailed view of the representation according to Figure 10 .
- the stiffening boxes 9, 10 extend to an articulated joint 51a arranged at a mast segment end 14.
- a first part of this articulated joint 51a is formed by the stiffening boxes 9, 10, with a receptacle for a second part of the articulated joint 51a being formed at the mast segment end 14, in which a further mast segment 1a ( Fig.6 ) can be recorded.
- FIG 12 is another detailed view of the mast segment 1 according to Figure 4 or according to Figure 5 shown.
- one of the reinforcement plates 8 ( Fig.7 ) is not shown.
- This allows a view into the stiffening boxes 9, 10.
- the web plates 4, 5 each have a recess 16, 17, whereby the recesses 16, 17 connect the hollow structure 6 of the mast segment 1 with the stiffening boxes 9, 10.
- With a recess 16, 17 in this area considerable material and weight can be saved on the web plates 4, 5, since these areas of the web plates 4, 5 between the mast segment end 14 and the bulkhead 13 play a rather subordinate role for the torsional stiffness of the mast segment 1.
- the upper and lower chords 2, 3 surrounding the stiffening boxes 9, 10 converge at the joint hub 22, whereby the stiffening boxes 9, 10 together with the connection areas 18, 19, apart from the recesses 16, 17, form a closed structure.
- the Figure 13 shows a mast segment 1 according to Figure 12 , whereby the illustration is rotated so that a view through the recesses 16, 17 of the web plates 4, 5 to the reinforcement plate 8 of the rear stiffening box 10 located behind it is possible.
- Mast segment 1 is according to Figure 4 or 5 shown in a perspective sectional view.
- the section allows a view into the hollow structure 6 between the upper chord 2 and the lower chord 3 of the mast segment 1.
- the upper chord 2 and the lower chord 3 are brought together at the mast segment end 14 to form the hollow structure 6.
- the bulkhead 13 separates the immersion area 11 of the hydraulic cylinder 52 from the hollow structure 6.
- the bulkhead 13 is arranged near the connection 12 of the hydraulic cylinder 52 and thus reinforces the structure of the mast segment 1 at a point that is crucial for the torsional rigidity.
- the Figure 15 shows another articulated mast 50 with a mast segment 1 reinforced by stiffening boxes 9, 10.
- the mast segment 1 is, as usual, supported by a top chord 2 ( Fig. 16 ) and a lower chord 3 ( Fig. 16 ) and two lateral web plates 4, 5.
- Laterally spaced from the web plates 4, 5 are reinforcement plates 9, 10 which, together with the upper and lower chords 2, 3, form stiffening boxes 9, 10 located on the side of the mast segment 1.
- the stiffening boxes 9, 10 formed here extend at least in some areas along the web plates 4, 5, with the extension area of the stiffening boxes 9, 10 being limited to an area around the connection 12 of the hydraulic cylinder 52. From here, however, the stiffening boxes 9, 10 are guided to an articulated joint 51a arranged at one end of the mast segment.
- the stiffening boxes 9, 10 form a first part of the articulated joint 51a, with another mast segment 1a of the articulated mast 50 being articulated between the stiffening boxes 9, 10.
- the web plates 4, 5 and the reinforcement plates 7, 8 run towards each other in the respective connection area 18, 19 and are then joined together, thus closing off the extension area of the stiffening boxes 9, 10.
- the Figure 16 shows a 50 mm articulated mast according to Figure 15 in a side view.
- the hydraulic cylinder 52 which is immersed in the mast segment 1, is shown partially in dashed lines. It can be seen that the stiffening boxes 9, 10 extend at least partially along the outside of the immersion area for the hydraulic cylinder 52. Figure 16 It is also apparent that the hydraulic cylinder 52 shown in dashed lines penetrates deeply between the web plates 4, 5 in the mast position shown.
- the Figure 17 shows another articulated mast 50 with a mast segment 1 reinforced by stiffening boxes 9, 10.
- the mast segment 1 is, as usual, supported by an upper chord 2 ( Fig. 18 ) and a lower chord 3 ( Fig. 18 ) and two lateral web plates 4, 5.
- Laterally spaced from the web plates 4, 5 are reinforcement plates 7, 8, which together with the upper flange 2 and the lower flange 3 form stiffening boxes 9, 10 located on the side of the mast segment 1.
- the stiffening boxes 9, 10 formed here extend in regions along the web plates 4, 5, whereby the extension region of the stiffening boxes 9, 10 is formed by means of the connection regions 18, 19 in which the web plates 4, 5 and the reinforcement plates 7, 8 run towards one another and are joined together. limited to an area around the connection 12 or the immersion area of the hydraulic cylinder 52.
- the Figure 18 shows a 50 mm articulated mast according to Figure 17 in a side view.
- the hydraulic cylinder 52 which is immersed in the mast segment 1, is shown partially in dashed lines. It can be seen that the stiffening boxes 9, 10 extend at least partially along the outside of the immersion area for the hydraulic cylinder 52.
- Figure 17 It can be seen that the hydraulic cylinder 52 shown in dashed lines penetrates deeply between the web plates 4, 5 in the mast position shown.
- connection areas 18, 19, in which the web plates 4,5 are attached to the reinforcement plates 7,8, are designed in such a way that a low notch effect acts on the web plates 4,5, i.e. the more gently or at a more acute angle the reinforcement plates 7,8 and the web plates 4,5 converge towards each other, the lower the notch effect on the web plates 4, 5.
- a right-angled connection between the plates 4,7 or 5,8 would mean that the web plates 4, 5 in the area of the connection areas 18, 19 would possibly have to be reinforced due to the notch effect.
- the reinforcement plates 7,8 in the connection areas 18 would converge towards the web plates 4, 5 in a slightly S-shaped curve.
- FIGs 19 ag Various examples of a mast segment according to the invention are shown, how the web plates 4, 5 and the reinforcing plates 7, 8 can run towards one another and be joined together in the connection areas 18, 19 in accordance with the invention. It is clear from this that the reinforcing plates 7, 8 are on the outside of the mast segment 1, ( Figures 19a, 19d ) but also within the mast segment 1 between the web plates 4,5 ( Figures 19b, 19c ) and, together with the upper chord 2 and the lower chord 3, form stiffening boxes 9, 10 arranged laterally on the mast segment 1.
- the web plates 4, 5 and reinforcing plates 7, 8 could not be folded and instead be joined together in the connection areas 18, 19 by means of attached or welded sheet metal pieces.
- the mast segments 1 are generally made of steel, but can also be made of fiber composite materials, for example, to further reduce weight.
- a mixed form is also conceivable, in which, for example, the upper and lower chords 2, 3 and the web plates 4, 5 are made of steel sheets and combined with reinforcing plates 7, 8 made of fiber composite materials.
- stiffening boxes 9, 10 are created on the side of the mast segment 1 with spaced-apart components that increase the torsional rigidity of the mast segment.
- the stiffening boxes 9, 10 are always designed in such a way that they form cavities or boxes that are closed to the outside and into which no water or moisture can penetrate, so that no corrosion can occur inside the stiffening boxes 9, 10, which generally cannot be painted during the production process.
- stiffening boxes 9, 10 are provided on the side of the mast segment 1, the length or position of which along the mast segment 1 can be structurally adapted in such a way that sufficient torsional stiffness for the mast segment is achieved with the lowest possible weight.
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Description
Die Erfindung betrifft ein Mastsegment mit einem Obergurt, einem Untergurt und zwei seitlichen Stegblechen, wobei die Stegbleche jeweils zusammen mit dem Obergurt, dem Untergurt und von den Stegblechen jeweils seitlich beabstandeten Verstärkungsblechen jeweils seitlich am Mastsegment liegende Versteifungskästen ausbilden. Außerdem betrifft die Erfindung einen Knickmast mit einem solchen Mastsegment und einen Großmanipulator mit einem solchen Knickmast.The invention relates to a mast segment with an upper chord, a lower chord and two lateral web plates, wherein the web plates, together with the upper chord, the lower chord and reinforcement plates laterally spaced from the web plates, form stiffening boxes located on the sides of the mast segment. The invention also relates to an articulated mast with such a mast segment and a large manipulator with such an articulated mast.
In
Aus der
Die Mastsegmente solcher Knickmasten sind in der Regel aus zwei seitlich angeordneten Stegblechen sowie einem Obergurt und einem Untergurt gebildet. In der Regel werden die Mastsegmente eines solchen Knickmastes durch Hydraulikzylinder gegeneinander verschwenkt, wobei die Hydraulikzylinder im eingeklappten Zustand zwischen den Mastsegmenten des Knickmastes liegen. Dieses Konstruktionsprinzip ist aber bei großen Mastlängen problematisch. Die Entwicklung von Großmanipulatoren unterliegt dem Zwang, wegen der wachsenden Anforderungen ständig steigende Mastlängen und Reichweiten vorzusehen, jedoch das Fahrzeugprofil für den Fahrbetrieb einzuhalten. Bei fahrbaren Autobetonpumpen kommt es auch darauf an, die zulässige Fahrzeughöhe nicht zu überschreiten, um Einschränkungen für Sondertransporte zu vermeiden, die bei Überhöhe eines Fahrzeuges gefordert werden. Gerade das Zusammenfalten langer Knickmasten macht es erforderlich, die Hydraulikzylinder in die Mastsegmente eintauchen zu lassen. An besonders langen Knickmasten sind zudem besonders große Hydraulikzylinder erforderlich. Die Eintauchbereiche, in denen die Hydraulikzylinder in die Mastsegmente eintauchen, schwächen die Mastsegmente und führen zu einer geringeren Torsionssteifigkeit, die insbesondere bei langen Masten dann nicht mehr ausreichend sein kann. Eine einfache Erhöhung der Blechdicke in diesen Bereichen ist aber nicht möglich, weil auch gewisse Gewichtsgrenzen für LKW einzuhalten sind und schwerere Masten weitere Gewichtserhöhungen am Unterbau der Maschine zur Folge haben, um die Standsicherheit der Maschine zu gewährleisten.The mast segments of such articulated masts are usually made up of two web plates arranged on the side, as well as an upper and lower chord. The mast segments of such an articulated mast are usually pivoted against each other by hydraulic cylinders, with the hydraulic cylinders lying between the mast segments of the articulated mast when folded in. However, this design principle is problematic for long masts. The development of large manipulators is subject to the need to provide for ever-increasing mast lengths and ranges due to growing requirements, while maintaining the vehicle profile for driving operation. With mobile truck-mounted concrete pumps, it is also important not to exceed the permissible vehicle height in order to avoid restrictions for special transport that are required when a vehicle is too high. Folding long articulated masts in particular makes it necessary to immerse the hydraulic cylinders in the mast segments. Particularly long articulated masts also require particularly large hydraulic cylinders. The immersion areas in which the hydraulic cylinders penetrate the mast segments weaken the mast segments and lead to a lower torsional rigidity, which may no longer be sufficient, especially with long masts. However, simply increasing the sheet thickness in these areas is not possible because certain weight limits for trucks must also be observed and heavier masts result in further weight increases on the substructure of the machine in order to ensure the stability of the machine.
Es ist daher Aufgabe der Erfindung, ein Mastsegment der oben genannten Art bereitzustellen, das den gewachsenen Anforderungen an die Reichweite von Masten gerecht wird, ohne dass damit Beeinträchtigungen in anderer Hinsicht einhergehen. Insbesondere soll ein verbessertes, leichtes und dennoch besonders torsionssteifes Mastsegment angegeben werden, welches zudem eine kompakte Faltung eines damit ausgestatteten Knickmastes ermöglicht. Außerdem soll ein Knickmast mit einem solchen Mastsegment bereitgestellt werden sowie ein Großmanipulator mit einem solchen Knickmast.It is therefore the object of the invention to provide a mast segment of the above-mentioned type which meets the increased requirements for the range of masts without causing impairments in other respects In particular, an improved, lightweight and yet particularly torsionally rigid mast segment is to be specified, which also enables a compact folding of an articulated mast equipped with it. In addition, an articulated mast with such a mast segment is to be provided, as well as a large manipulator with such an articulated mast.
Gelöst wird diese Aufgabe durch ein Mastsegment mit den Merkmalen des Anspruchs 1 sowie einen Knickmast mit einem solchen Mastsegment gemäß Anspruch 10 sowie einen Großmanipulator mit einem solchen Knickmast gemäß Anspruch 11.This object is achieved by a mast segment with the features of
Dadurch, dass die Stegbleche jeweils zusammen mit dem Obergurt, dem Untergurt und von den Stegblechen jeweils seitlich beabstandeten Verstärkungsblechen jeweils seitlich am Mastsegment liegende Versteifungskästen ausbilden, kann ein besonders torsionssteifes und leichtes Mastsegment angegeben werden, bei welchem zudem ein Eintauchen eines Hydraulikzylinder in den Zwischenraum zwischen die seitlichen Versteifungskästen möglich ist. Die seitlichen Versteifungskästen stärken das Mastsegment und führen zu einer höheren Torsionssteifigkeit des Mastsegmentes, ohne dass sich hierdurch das Gewicht übermäßig erhöht. Die hohl ausgestalteten Versteifungskästen, welche durch die Stegbleche und seitlich zu diesen beabstandete Verstärkungsbleche gebildet sind, bieten eine zusätzliche Struktur des Mastsegmentes, wobei diese zusätzliche Struktur die Torsionssteifigkeit des Mastsegmentes erhöht. Die Struktur der seitlichen Versteifungskästen ist eine Ergänzung der Struktur des Mastsegments und bildet ein zusätzliches Teil des Mastsegments. Die seitlich am Mastsegment angeordneten Versteifungskästen werden hierzu einfach aus dem Obergurt, dem Untergurt, von den Stegblechen sowie von den Stegblechen jeweils seitlich beabstandeten Verstärkungsblechen gebildet.Because the web plates, together with the upper chord, the lower chord and the reinforcement plates laterally spaced apart from the web plates, form stiffening boxes on the sides of the mast segment, a particularly torsionally rigid and lightweight mast segment can be specified, in which it is also possible to insert a hydraulic cylinder into the space between the lateral stiffening boxes. The lateral stiffening boxes strengthen the mast segment and lead to a higher torsional stiffness of the mast segment without increasing the weight excessively. The hollow stiffening boxes, which are formed by the web plates and reinforcement plates laterally spaced apart from them, offer an additional structure for the mast segment, whereby this additional structure increases the torsional stiffness of the mast segment. The structure of the lateral stiffening boxes supplements the structure of the mast segment and forms an additional part of the mast segment. For this purpose, the stiffening boxes arranged on the sides of the mast segment are simply formed from the upper chord, the lower chord, the web plates and reinforcement plates spaced laterally from the web plates.
Gemäß der Erfindung ist vorgesehen, dass sich die Versteifungskästen zumindest bereichsweise entlang des Mastsegmentes erstrecken. Durch sich bereichsweise entlang des Mastsegments erstreckende Versteifungskästen können die Mastsegmente gezielt bereichsweise verstärkt und so die Torsionssteifigkeit des Mastsegmentes gesteigert werden. Die lediglich bereichsweise Verstärkung des Mastsegmentes führt zu einer nur geringen Gewichtssteigerung des Mastsegmentes bei deutlich erhöhter Torsionssteifigkeit, da besonders geschwächte Mastsegmentabschnitte bereichsweise verstärkt werden können.According to the invention, it is provided that the stiffening boxes extend at least partially along the mast segment. By means of stiffening boxes extending partially along the mast segment, the mast segments can be reinforced in specific areas and thus the torsional stiffness of the mast segment can be increased. The only Reinforcing the mast segment in certain areas leads to only a slight increase in the weight of the mast segment while significantly increasing torsional rigidity, since particularly weakened mast segment sections can be reinforced in certain areas.
Vorteilhafterweise ist innerhalb des Mastsegmentes ein sich längs erstreckender Mittelgurt angeordnet, der zusammen mit den Stegblechen und dem Obergurt oder dem Untergurt einen weiteren Versteifungskasten bildet. Dieser dritte Versteifungskasten befindet sich vorzugsweise zwischen den zwei von den Steg- und Verstärkungsblechen gebildeten Versteifungsblechen und erhöht so weiter die Torsionssteifigkeit des Mastsegmentes.Advantageously, a longitudinally extending central chord is arranged within the mast segment, which together with the web plates and the upper chord or the lower chord forms a further stiffening box. This third stiffening box is preferably located between the two stiffening plates formed by the web and reinforcement plates and thus further increases the torsional stiffness of the mast segment.
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 embodiments and further developments of the invention emerge from the dependent claims. It should be noted that the features listed individually in the claims can also be combined with one another in any technologically reasonable manner and thus show further embodiments of the invention.
Von besonderem Vorteil ist, dass die, die Versteifungskästen bildenden Stegbleche und die Verstärkungsbleche jeweils in einem Anbindungsbereich aneinander gefügt werden und damit den Erstreckungsbereich der Versteifungskästen abschließen. Durch das Aneinanderfügen der Bleche kann der durch die Versteifungskästen gebildete Erstreckungsbereich gezielt an einer Stelle entlang des Mastsegmentes abgeschlossen werden und ab dieser Stelle geht der Mast in die konventionelle Bauart mit zwei seitlichen Stegblechen und einem Ober- und Untergurt über. Zudem werden die Versteifungskästen durch das Aneinanderfügen der Steg- und Verstärkungsbleche im Anbindungsbereich verschlossen, so dass kein Wasser o.ä. eindringen und damit zu Korrosion im Inneren der Versteifungskästen führen kann.A particular advantage is that the web plates and reinforcement plates forming the stiffening boxes are each joined together in a connection area, thus closing off the extension area of the stiffening boxes. By joining the plates together, the extension area formed by the stiffening boxes can be closed off at a specific point along the mast segment, and from this point on the mast changes to the conventional design with two side web plates and an upper and lower chord. In addition, the stiffening boxes are closed off in the connection area by joining the web and reinforcement plates together, so that no water or similar can penetrate and thus lead to corrosion inside the stiffening boxes.
Besonders vorteilhaft ist die Ausführungsform, dass sich die Versteifungskästen zumindest bereichsweise entlang eines Eintauchbereiches für einen Hydraulikzylinder erstrecken. Der Eintauchbereich des Hydraulikzylinders schwächt in der Regel das Mastsegment, sodass hier eine Verstärkung durch die Versteifungskästen eine besonders effektive Auswirkung auf die Torsionssteifigkeit des Mastsegmentes hat.The embodiment in which the stiffening boxes extend at least partially along an immersion area for a hydraulic cylinder is particularly advantageous. The immersion area of the hydraulic cylinder usually weakens the mast segment, so that reinforcement by the stiffening boxes have a particularly effective effect on the torsional stiffness of the mast segment.
Eine besonders vorteilhafte Ausführung der Erfindung sieht vor, dass der Erstreckungsbereich der Versteifungskästen entlang des Mastsegmentes auf einen Bereich um die Anbindung des Hydraulikzylinders begrenzt ist. Besonders im Bereich der Anbindung der Hydraulikzylinder an die Mastsegmente ist die Möglichkeit der üblichen torsionssteifen Konstruktion eines Kastenprofils mit seitlichen Stegblechen und Ober- und Untergurt nur eingeschränkt oder nicht möglich, sodass eine Verstärkung mit seitlich angeordnete Versteifungskästen im Bereich der Anbindung der Hydraulikzylinder oder damit verbundener Hebelgetriebe besonders wirksam zur Erhöhung der Torsionssteifigkeit des Mastsegmentes ist.A particularly advantageous embodiment of the invention provides that the extension area of the stiffening boxes along the mast segment is limited to an area around the connection of the hydraulic cylinder. Particularly in the area of the connection of the hydraulic cylinders to the mast segments, the possibility of the usual torsionally rigid construction of a box profile with side web plates and upper and lower chords is only possible to a limited extent or not at all, so that reinforcement with laterally arranged stiffening boxes in the area of the connection of the hydraulic cylinders or associated lever gears is particularly effective for increasing the torsional rigidity of the mast segment.
Von besonderem Vorteil ist gemäß einer Ausgestaltung, dass zwischen den Versteifungskästen mindestens eine rechtwinklig zu den Versteifungskästen angeordnete Schottwand vorgesehen ist, welche den Eintauchbereich des Hydraulikzylinders zwischen den Versteifungskästen abgrenzt. Mit einer solchen Schottwand kann die Torsionssteifigkeit des Mastsegmentes zusätzlich erhöht werden. Eine vorteilhafte Ausführung ist, dass die Versteifungskästen bis in den Bereich eines an einem Mastsegmentende angeordneten Knickgelenkes reichen. Die Weiterführung der Versteifungskästen bis in den Bereich eines Knickgelenks hat den Vorteil, dass die Aufnahme des Knickgelenks verstärkt wird und somit eine höhere Torsionssteifigkeit bietet.According to one embodiment, it is particularly advantageous that at least one bulkhead is provided between the stiffening boxes, arranged at right angles to the stiffening boxes, which delimits the immersion area of the hydraulic cylinder between the stiffening boxes. With such a bulkhead, the torsional rigidity of the mast segment can be further increased. An advantageous embodiment is that the stiffening boxes extend into the area of an articulated joint arranged at one end of the mast segment. The continuation of the stiffening boxes into the area of an articulated joint has the advantage that the support of the articulated joint is reinforced and thus offers greater torsional rigidity.
Besonders vorteilhaft ist die Ausführungsform, dass sich die Versteifungskästen von dem Mastsegmentende bis zur halben Länge des Mastsegments erstrecken. Für eine ausreichend hohe Torsionssteifigkeit reicht es aus, die Versteifungskästen von dem Mastsegmentende bis etwa zur halben Länge des Mastsegmentes zu führen. Diese bereichsweise Verstärkung durch die Versteifungskästen hat eine besonders große Wirkung auf die Torsionssteifigkeit des Mastsegmentes.A particularly advantageous embodiment is that the stiffening boxes extend from the end of the mast segment to half the length of the mast segment. To achieve sufficiently high torsional rigidity, it is sufficient to extend the stiffening boxes from the end of the mast segment to about half the length of the mast segment. This regional reinforcement by the stiffening boxes has a particularly large effect on the torsional rigidity of the mast segment.
Eine besonders vorteilhafte Ausführungsform der Erfindung sieht vor, dass die Versteifungskästen jeweils eine Aussparung aufweisen, wobei die Aussparung eine zwischen den Versteifungskästen ausgebildete hohle Struktur mit den Versteifungskästen verbindet. Mit einer solchen Aussparung kann gezielt Gewicht an dem Mastsegment eingespart werden. Dadurch, dass die hohle Struktur des Mastsegmentes über die Aussparung mit der hohlen Struktur des Versteifungskastens verbunden wird, ist immer noch ein geschlossenes Mastsegment gegeben, das von innen wenig korrosionsanfällig ist. Die Aussparungen in den Stegblechen können gezielt in Bereichen der Versteifungskästen angeordnet werden, an denen die Versteifungskästen für die Torsionssteifigkeit und die Stabilität des Mastsegmentes insgesamt eine eher untergeordnete Rolle spielen.A particularly advantageous embodiment of the invention provides that the stiffening boxes each have a recess, wherein the recess a hollow structure formed between the stiffening boxes connects the stiffening boxes. With such a recess, weight can be saved on the mast segment in a targeted manner. Because the hollow structure of the mast segment is connected to the hollow structure of the stiffening box via the recess, a closed mast segment is still provided that is less susceptible to corrosion from the inside. The recesses in the web plates can be arranged in targeted areas of the stiffening boxes where the stiffening boxes play a rather minor role in the torsional stiffness and stability of the mast segment as a whole.
Es ist von besonderem Vorteil, wenn die Stegbleche und die Verstärkungsbleche in den Anbindungsbereichen aufeinander zu laufen, d.h. die Bleche laufen beispielsweise spitzwinklig aufeinander zu und sind dann im Anbindungsbereich miteinander verbunden. Damit wird der Kraftfluss im Anbindungsbereich vom Verstärkungsblech in das Stegblech sanfter gestaltet und eine geringere Kerbwirkung auf das Stegblech erreicht.It is particularly advantageous if the web plates and the reinforcement plates run towards each other in the connection areas, i.e. the plates run towards each other at an acute angle, for example, and are then connected to each other in the connection area. This makes the flow of force in the connection area from the reinforcement plate to the web plate smoother and achieves a lower notch effect on the web plate.
Ferner ist Gegenstand der Erfindung ein Knickmast mit einer Mehrzahl von Mastsegmenten, wobei die Mastsegmente an Knickgelenken jeweils um Knickachsen gegenüber einem benachbarten Mastsegment oder einem Drehschemel verschwenkbar sind, mit mindestens einem bereits und im Folgenden näher beschriebenen Mastsegment. Ein solches Mastsegment ermöglicht an einem Knickmast große Reichweiten mit einer ausreichend hohen Torsionssteifigkeit des Mastsegmentes. Bevorzugt ist das erste, am Drehschemel angeordnete Mastsegment mit entsprechenden (wie zuvor und im Folgenden beschriebenen) Versteifungskästen ausgestattet. Hier ist der Hydraulikzylinder, der eine Verschwenkung zwischen ersten Mastsegment und Drehschemel ermöglicht, besonders groß und erfordert einen großen Eintauchbereich, der die Torsionssteifigkeit des Mastsegmentes reduziert. Gerade an diesem Mastsegment sind die vorgeschlagenen Versteifungskästen somit besonders wirksam.The invention further relates to an articulated mast with a plurality of mast segments, the mast segments being pivotable at articulated joints about articulated axes relative to an adjacent mast segment or a pivoting bolster, with at least one mast segment already described and described in more detail below. Such a mast segment enables large ranges on an articulated mast with a sufficiently high torsional rigidity of the mast segment. The first mast segment arranged on the pivoting bolster is preferably equipped with corresponding stiffening boxes (as described above and below). Here, the hydraulic cylinder, which enables pivoting between the first mast segment and the pivoting bolster, is particularly large and requires a large immersion area, which reduces the torsional rigidity of the mast segment. The proposed stiffening boxes are therefore particularly effective on this mast segment in particular.
Ferner ist Gegenstand der Erfindung ein Großmanipulator, insbesondere eine Autobetonpumpe, mit einem um eine Hochachse drehbaren Drehschemel mit darauf aufgebautem Knickmast. Besonders bei solchen Großmanipulatoren sind leichte und torsionssteife Mastsegmente und Knickmasten von besonderer Bedeutung um die steigenden Anforderungen bezüglich Reichweite und Höhe erfüllen zu können.Furthermore, the invention relates to a large manipulator, in particular a truck-mounted concrete pump, with a turntable rotatable about a vertical axis with Especially with such large manipulators, light and torsion-resistant mast segments and articulated masts are of particular importance in order to be able to meet the increasing requirements in terms of reach and height.
Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aufgrund der nachfolgenden Beschreibung sowie anhand der Zeichnungen. Ausführungsbeispiele der Erfindung sind in den folgenden Zeichnungen dargestellt und werden nachfolgend näher beschrieben. Einander entsprechende Gegenstände sind in allen Figuren mit den gleichen Bezugszeichen versehen. Es zeigen:
Figur 1- erfindungsgemäßer Großmanipulator,
Figur 2- erfindungsgemäßer Knickmast,
Figur 3- Knickmast in weiterer Ausführung,
Figur 4- erfindungsgemäßes Mastsegment,
Figur 5- Mastsegment in weiterer Ausführung,
Figur 6- Knickmast in weiterer Ausführung,
Figur 7- offenes Mastsegment,
Figur 8- offenes Mastsegment,
Figur 9- offenes Mastsegment,
Figur 10- Schnittdarstellung von Mastsegment,
Figur 11- Detailschnittansicht zu Mastsegment,
Figur 12- Detailansicht zu Mastsegment,
Figur 13- Detailansicht zu Mastsegment,
Figur 14- Detailschnittdarstellung zu Mastsegment,
Figur 15- Knickmast in weiterer Ausführung,
Figur 16- Knickmast in Seitenansicht,
Figur 17- Knickmast in weiterer Ausführung,
Figur 18- Knickmast in Seitenansicht,
Figur 19 a-g- Auschnittsansichten verschiedener Ausführungsformen des erfindungsgemäßen Mastsegmentes.
- Figure 1
- inventive large manipulator,
- Figure 2
- inventive articulated mast,
- Figure 3
- Articulated mast in further design,
- Figure 4
- mast segment according to the invention,
- Figure 5
- Mast segment in further design,
- Figure 6
- Articulated mast in further design,
- Figure 7
- open mast segment,
- Figure 8
- open mast segment,
- Figure 9
- open mast segment,
- Figure 10
- Sectional view of mast segment,
- Figure 11
- Detailed section view of mast segment,
- Figure 12
- Detailed view of mast segment,
- Figure 13
- Detailed view of mast segment,
- Figure 14
- Detailed section of mast segment,
- Figure 15
- Articulated mast in further design,
- Figure 16
- Articulated mast in side view,
- Figure 17
- Articulated mast in further design,
- Figure 18
- Articulated mast in side view,
- Figure 19 ag
- Detail views of various embodiments of the mast segment according to the invention.
In den Figuren mit dem Bezugszeichen 1 bezeichnet ist ein erfindungsgemäßes Mastsegment 1 dargestellt. Mit dem Bezugszeichen 50 ist ein erfindungsgemäßer Knickmast 50 bezeichnet. Das Bezugszeichen 100 bezeichnet einen erfindungsgemäßen Großmanipulator 100. Der in
Die Mastsegmente 1, 1a, 1b sind durch einen Obergurt 2 und einen Untergurt 3 sowie zwei seitliche Stegbleche 4, 5 gebildet, wobei die Bleche 2, 3, 4, 5 an den Kanten zu einem Kasten zusammengeschweißt sind. Das erste Mastsegment 1 weist Stegbleche 4, 5 auf, die jeweils zusammen mit dem Obergurt 2, dem Untergurt 3 und von den Stegblechen 4, 5 jeweils seitlich beabstandeten Verstärkungsblechen 7, 8 jeweils seitlich am Mastsegment 1 liegende Versteifungskästen 9, 10 ausbilden. In der
Aus
Die
Aus
Die
Wie in
Die hier ersichtlichen Versteifungskästen 9, 10 erstrecken sich zumindest bereichsweise entlang des Eintauchbereichs 11 für den Hydraulikzylinder 52 (
Aus
In
Die eingebrachten Aussparungen 16, 17 in den Stegblechen 4, 5 sind auch in
Gegenüber der Darstellung gemäß
Zusätzlich zeigt die Schnittdarstellung A-A der
Die
Die
Mit der
Die
In
Die
Die
Die
Die
Die Anbindungsbereiche 18, 19, in denen die Stegbleche 4,5 an die Verstärkungsbleche 7,8 angefügt sind, sind so ausgeführt, dass eine geringe Kerbwirkung auf die Stegbleche 4,5 wirkt, d.h. je sanfter bzw. spitzwinkliger die Verstärkungsbleche 7,8 und die Stegbleche 4,5 aufeinander zulaufen, desto geringer ist die Kerbwirkung auf die Stegbleche 4, 5. Eine rechtwinklige Anbindung zwischen den Blechen 4,7, bzw. 5,8 hätte zur Folge, dass die Stegbleche 4, 5 im Bereich der Anbindungsbereiche 18, 19 u.U. aufgrund der Kerbwirkung verstärkt werden müssten. Im Idealfall würden die Verstärkungsbleche 7,8 in den Anbindungsbereichen 18 leicht s-förmig gebogen auf die Stegbleche 4, 5 zulaufen.The
In den
In den
Ebenso könnten bei allen gezeigten Varianten die Stegbleche 4, 5 und Verstärkungsbleche 7, 8 nicht gekantet sein und dafür in den Anbindungsbereichen 18, 19 mittels angesetzter bzw. geschweißter Blechstücke aneinander gefügt werden.Likewise, in all variants shown, the
Alle hier dargestellten Verbindungen der Bauteile werden in der Regel miteinander verschweißt, aber auch andere Verbindungstechnologien (z.B. Kleben, Nieten, Schrauben usw.) sind denkbar. Die Mastsegmente 1 werden in der Regel aus Stahl gefertigt, können aber beispielsweise auch aus Faserverbundwerkstoffen zur weiteren Gewichtsreduzierung hergestellt sein. Auch eine Mischform, bei der beispielsweise die Ober- und Untergurte 2, 3 und die Stegbleche 4, 5 aus Stahlblechen gefertigt sind und mit Verstärkungsblechen 7,8 aus Faserverbundwerkstoffen kombiniert werden, sind denkbar. Entscheidend im Sinne der Erfindung ist, dass seitlich am Mastsegment 1 Versteifungskästen 9,10 mit zueinander beabstandeten Bauteilen entstehen, die die Torsionssteifigkeit des Mastsegmentes erhöhen.All of the connections between the components shown here are generally welded together, but other connection technologies (e.g. gluing, riveting, screwing, etc.) are also conceivable. The
Die Versteifungskästen 9,10 sind in allen gezeigten Ausführungsbeispielen immer so konstruiert, dass diese nach außen geschlossene Hohlräume bzw. Kästen bilden, in die kein Wasser oder Feuchtigkeit eindringen kann, so dass im Inneren der Versteifungskästen 9,10, die im Produktionsprozess in der Regel nicht lackiert werden können, keine Korrosion auftreten kann.In all the embodiments shown, the
Der besondere Vorteil der hier dargestellten Erfindung besteht darin, dass seitlich am Mastsegment 1 Versteifungskästen 9,10 vorgesehen sind, deren Länge bzw. Position entlang des Mastsegmentes 1 konstruktiv so angepasst werden kann, dass sich eine für das Mastsegment ausreichende Torsionssteifigkeit bei geringstmöglichem Gewicht ergibt.The particular advantage of the invention presented here is that stiffening
-
1 1a 1b Mastsegment1
1a 1b Mast segment - 2 Obergurt2 Upper chord
- 3 Untergurt3 Lower chord
- 4 Stegblech A4 Web plate A
- 5 Stegblech B5 Web plate B
- 6 hohle Struktur6 hollow structure
- 7 Verstärkungsblech A7 Reinforcing plate A
- 8 Verstärkungsblech B8 Reinforcing plate B
- 9 Versteifungskasten A9 Stiffening box A
- 10 Versteifungskasten B10 Stiffening box B
- 11 Eintauchbereich11 Immersion area
- 12 12a Anbindung Hydraulikzylinder12 12a Hydraulic cylinder connection
- 13 Schottwand13 Bulkhead
- 14 Mastsegmentende14 Mast segment end
- 15 Aufnahme15 Recording
- 16 Aussparung A16 Recess A
- 17 Aussparung B17 Recess B
- 18 Anbindungsbereich A18 Connection area A
- 19 Anbindungsbereich B19 Connection area B
- 20 Mittelgurt20 center belt
- 21 Versteifungskasten C21 Stiffening box C
- 22 Gelenknabe22 Joint hub
- 50 Knickmast50 Articulated mast
-
51 51a 51b Knickgelenk51
51a 51b Articulated joint - 52 52a Hydraulikzylinder52 52a Hydraulic cylinder
- 100 Großmanipulator100 Large Manipulator
- 101 Hochachse101 Vertical axis
- 102 Drehschemel102 turntable
Claims (11)
- Mast segment (1) for a large manipulator (100), comprising a top strand (2), a bottom strand (3) and two lateral web plates (4, 5), wherein the web plates (4, 5) in each case together with the top strand (2), the bottom strand (3) and with reinforcement plates (7, 8) each spaced from the web plates (4, 5) in each case form stiffening boxes (9, 10) located laterally on the mast segment (1), wherein the stiffening boxes (9, 10) extent at least in sections along a plunging region (11) for a hydraulic cylinder (52),
characterized in that
a longitudinally-extending central strand (20) is arranged within the mast segment (1), which strand forms another reinforcement box (21) together with the web plates (4, 5) and the upper strand (3) in such a way that three reinforcement boxes (9, 10, 21) are formed in the plunging region (11) of the hydraulic cylinder (52) by means of the upper strand (2), the lower strand (3), the web plates (4, 5), the reinforcement plates (7, 8) and the middle strand (20). - Mast segment (1) according to claim 1, characterized in that the reinforcement boxes (9, 10) extend at least in sections along the mast segment (1).
- Mast segment (1) according to claim 2, characterized in that the web plates (4, 5) and the reinforcement plates (7, 8) are each joined to one another in a connecting region (18, 19) and thereby terminate the extension region of the reinforcement boxes (9, 10).
- Mast segment (1) according to one of claims 1 to 3, characterized in that the extension region of the reinforcement boxes (9, 10) along the mast segment (1) is restricted to a region around the connection (12) of the hydraulic cylinder (52).
- Mast segment (1) according to one of claims 1 to 4, characterized in that at least one bulk wall (13) arranged in a right angle with respect to the reinforcement boxes (9, 10) is arranged between the reinforcement boxes (9, 10), said wall delimiting the plunging region (11) of the hydraulic cylinder (52).
- Mast segment (1) according to one of claims 1 to 5, characterized in that the reinforcement boxes (9, 10) extend as far as into the region of the articulation joint (51a) arranged on the mast segment end (14).
- Mast segment (1) according to claim 5, characterized in that the reinforcement boxes (9, 10) extend from the mast segment end (14) as far as to substantially halfway the length of the mast segment (1).
- Mast segment (1) according to one of claims 1 to 7, characterized in that the reinforcement boxes (9, 10) comprise at least one recess (16, 17), wherein the recess (16, 17) connects a hollow structure (6) formed between the reinforcement boxes (9, 10) with said reinforcement boxes (9, 10).
- Mast segment (1) according to one of claims 2 to 8, characterized in that the web plates (4, 5) and the reinforcement plates (7, 8) converge towards one another in the connecting regions (18, 19).
- Articulated mast (10) having multiple mast segments (1, 1a, 1b),
wherein the mast segments (1, 1a, 1b) are pivotable on articulated joints (51, 51a, 51b) in each case about articulation axes with respect to an adjacent mast segment (1, 1a, 1b) or a turntable (102), comprising a mast segment (1) according to one of claims 1 to 9. - Large manipulator (100), in particular truck-mounted concrete pump, comprising a turntable (102) rotatable about a vertical axis (101) and an articulated mast (50) according to claim 10 mounted thereon.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017124505.7A DE102017124505A1 (en) | 2017-10-20 | 2017-10-20 | Double-walled mast segment |
PCT/EP2018/078547 WO2019077042A1 (en) | 2017-10-20 | 2018-10-18 | Double-walled boom segment |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3697982A1 EP3697982A1 (en) | 2020-08-26 |
EP3697982B1 true EP3697982B1 (en) | 2024-05-22 |
Family
ID=64184041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18799678.0A Active EP3697982B1 (en) | 2017-10-20 | 2018-10-18 | Double-walled boom segment |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3697982B1 (en) |
DE (1) | DE102017124505A1 (en) |
WO (1) | WO2019077042A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5863255U (en) * | 1981-10-21 | 1983-04-28 | セイレイ工業株式会社 | Main boom structure of backhoe |
DE3713152C1 (en) * | 1987-04-15 | 1988-04-21 | Mannesmann Ag | Box-type telescoping crane jib |
JP3293054B2 (en) * | 1994-11-24 | 2002-06-17 | ヤンマーディーゼル株式会社 | Backhoe |
JP4444606B2 (en) * | 2003-09-18 | 2010-03-31 | 日立建機株式会社 | Construction machinery |
DE102007001913B4 (en) | 2007-01-12 | 2010-10-14 | Schwing Gmbh | Jib device and outrigger vehicle |
JP2010112094A (en) * | 2008-11-07 | 2010-05-20 | Hitachi Constr Mach Co Ltd | Construction machine |
DE102014220754A1 (en) * | 2014-10-14 | 2016-04-14 | Putzmeister Engineering Gmbh | Mast arm and concrete distributor mast |
-
2017
- 2017-10-20 DE DE102017124505.7A patent/DE102017124505A1/en active Pending
-
2018
- 2018-10-18 WO PCT/EP2018/078547 patent/WO2019077042A1/en unknown
- 2018-10-18 EP EP18799678.0A patent/EP3697982B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE102017124505A1 (en) | 2019-04-25 |
EP3697982A1 (en) | 2020-08-26 |
WO2019077042A1 (en) | 2019-04-25 |
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