EP2976287B1 - Flèche de grue et grue - Google Patents

Flèche de grue et grue Download PDF

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Publication number
EP2976287B1
EP2976287B1 EP14711449.0A EP14711449A EP2976287B1 EP 2976287 B1 EP2976287 B1 EP 2976287B1 EP 14711449 A EP14711449 A EP 14711449A EP 2976287 B1 EP2976287 B1 EP 2976287B1
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EP
European Patent Office
Prior art keywords
boom
crane
accordance
cross
transport
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.)
Active
Application number
EP14711449.0A
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German (de)
English (en)
Other versions
EP2976287A1 (fr
Inventor
Günter Lehner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Biberach GmbH
Original Assignee
Liebherr Werk Biberach GmbH
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Publication of EP2976287A1 publication Critical patent/EP2976287A1/fr
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Classifications

    • 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
    • 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
    • B66C23/18—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 specially adapted for use in particular purposes
    • B66C23/26—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 specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B66C23/344—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes adapted for transport purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C7/00—Runways, tracks or trackways for trolleys or cranes
    • B66C7/02—Runways, tracks or trackways for trolleys or cranes for underhung trolleys or cranes
    • B66C7/04—Trackway suspension
    • B66C7/06—Trackway suspension on supports constructed for easy erection, e.g. transportable

Definitions

  • the invention relates to a crane boom for a crane with a triangular boom section and a crane with such a boom.
  • FIG. 1 a sketchy representation of a conventional boom section.
  • This boom comprises the two lower chords B, C and the upper chord A. All straps are connected to each other on truss diagonals, the so-called gratings.
  • the usual triangular cross-sections starting from the top flange A, are an isosceles triangle whose sections AB (triangle side 1) and AC (triangle side 2) have identical lengths.
  • the top chord A is thus above half the distance BC (triangle side 3) between the bottom chords B and C.
  • the bisector 4 intersects the distance BC in the middle.
  • the angles ⁇ , ⁇ of the lower chords B, C are identical or nearly identical.
  • the U-shape of the cantilever system has some disadvantages compared to the conventional triangular shape.
  • the U-shape requires two upper straps, resulting in an increase in boom weight and an increase in manufacturing cost.
  • open cross-sections are extremely torsionally soft. These can be used in rapid-erecting cranes only in those boom areas, which during crane operation or during crane installation only small torsional forces, eg. B. caused by wind exposed are. As a consequence threatens a limitation of the maximum allowable wind speeds during crane operation or during crane installation, which would run counter the versatility of such cranes.
  • the DE 34 19 427 discloses a crane boom according to the preamble of claim 1.
  • An alternative boom design as a telescopic boom is costly and generates extra weight, in particular by the overlapping in the telescopic boom arms parts. Furthermore, due to the overlap, the actually existing boom length can not be optimally utilized. In addition, special provisions must be made for telescopic jibs for the use of a trolley operation, since different telescopic shots, for example, require a lane change of the trolley.
  • Object of the present invention is therefore to develop a generic crane such that it can be positioned more compact to each other in the transport height and / or in the transport width and also no appreciable impairment of the proven and torsionally rigid boom section must be taken into account.
  • a modified cantilever cross-sectional shape whereby two cantilever parts are interleaved with each other to be positioned more compact to each other either in the transport height and / or in the transport width.
  • the crane boom has two lower chords and a top chord, which are interconnected by means of gratings and form a triangular cross-sectional shape.
  • the modified cantilever cross-sectional shape has, at least in sections, a triangular cross-sectional shape with an eccentrically extending upper flange.
  • the triangular shape thus formed no longer corresponds to an isosceles triangle.
  • the upper flange is not on the bisector of the The lower straps connect triangle side, but moves closer towards one of the two lower straps.
  • the largest space savings in crane transport results when the crane boom at least partially has a right-angled or nearly rectangular triangular shape.
  • At least those boom sections on the boom cross-sectional shape according to the invention which are to be positioned next to each other for transport or each other.
  • At least two cantilever parts are interleaved or positioned next to one another in such a way that their longest triangular sides or, in the case of a right-angled triangle, their hypotenuses are placed against one another.
  • the longest side of the triangle or the hypotenuse of the boom cross-section connects the upper flange to a lower flange of the crane jib.
  • the remaining sides of the triangle connect the top flange to the remaining bottom flange and the two bottom straps to each other.
  • a catheter of the triangular shape formed leads from the top chord to the remaining chord and the second chord connects the two bottom chords of the jib.
  • the upper flange is approximately perpendicular above one of the lower chords of the triangular shape.
  • connection of the upper belt on the hypotenuse can be done either with the first or second Untergurt.
  • the crane boom comprises at least two boom pieces, which are removable for road transport or the storage of the boom.
  • the at least two boom pieces can therefore be positioned interleaved with each other so that most favorable case, the transport dimensions only slightly larger than the dimension of a single boom part fails.
  • Prescribed or desired transport heights or transport widths are easier to comply with and more cantilever parts can be accommodated in the same space. This applies equally to road transport, where in particular legal provisions have to be observed, as well as for container transport, where often the maximum maximum is limited.
  • At least two boom sections are mounted pivotably relative to one another about a pivot axis, in particular a horizontal pivot axis.
  • a pivot axis in particular a horizontal pivot axis.
  • the at least two boom sections can be swiveled by nearly 180 ° relative to each other, whereby the boom sections for crane transport can be applied to one another or one above the other, in particular their longest triangular sides or hypotenuses can be placed against one another.
  • the upper chords of the at least two boom sections extend laterally offset relative to one another during crane operation.
  • the boom areas are constructed mirror-inverted, ie the longest sides of the triangle or hypotenuses of the boom sections connect different lower straps to the upper strap.
  • these two boom sections with offset to each other boom upper belt against each other by 180 ° for transport are pivotable and can be applied to each other, so that the resulting cross-sectional shape and thus in particular increased height in nested boom sections during transport only insignificantly compared to the dimension of a single boom part.
  • such an advantageous construction of the crane jib results in both boom areas being able to pivot against one another in such a way that the longest triangular sides or hypotenuses of the respective boom cross-sections lie against one another.
  • the horizontally oriented pivot axis is arranged in the range between half the system height of the crane jib and the plane of the upper chord.
  • the boom parts can only be positioned relative to one another by pivoting this axle for transport in the sense of the invention.
  • the crane boom according to the invention is not reduced to such a modified boom cross-section.
  • the boom is designed in addition to a section with the inventive shaping with at least one isosceles triangular cross-sectional shape forming boom area.
  • the transition between different boom sections with different boom sections may require the integration of one or more transition pieces.
  • the solution according to the invention makes it possible in a simple way to integrate a cat operation on the boom. For this purpose, it may be advantageous if the two lower chords form a Katzfahrbahn.
  • the invention further relates to a crane, in particular a rapid-erecting crane or a top-slewing crane, with a crane boom according to the present invention or an advantageous embodiment of the invention.
  • a crane in particular a rapid-erecting crane or a top-slewing crane, with a crane boom according to the present invention or an advantageous embodiment of the invention.
  • the crane according to the invention the same advantages and properties as for the crane boom according to the invention, which is why at this point a repetitive description is omitted.
  • FIG. 2 shows the opposite a sketched cross-sectional view of the crane boom according to the invention, which is characterized by a modified triangular cross-section.
  • the invention is based on the proven and torsionally rigid boom structure with triangular cross-section. Analogous to the prior art, this cantilever shape has two lower chords B, C and a top chord A, wherein all straps are interconnected by means of truss diagonals, the so-called grating.
  • the modified cantilever cross-section does not form an isosceles triangle, but a right-angled or approximately right-angled triangle with the straps A, B and C as corners.
  • a first catheter as a distance AC (triangle side 20) runs from the upper belt A to lower belt C, while the second catheter runs as a distance BC (triangle side 30) from the lower belt B to the lower belt C.
  • the distance AB (triangle side 10) then forms a hypotenuse from the upper belt A to the second lower belt B.
  • the upper belt A is therefore located approximately vertically above the lower belt C.
  • the right angle is located at the lower belt C.
  • the cantilever shape according to the invention is of course not on the illustration according to FIG. 2 limited.
  • the structure of the cantilever may as well be mirrored so that the hypotenuse is formed by the distance AC.
  • FIGS. 3 and 4 show a crane boom, which consists of at least two separate boom parts 5, 6, 50, 60, which are dismantled for crane transport and positioned side by side on a means of transport, not shown.
  • FIG. 3 corresponds to a known from the prior art crane boom with the usual triangular cross-section.
  • the illustration shows a cross section through the longitudinal axis of the adjacently positioned boom parts 5, 6.
  • a first boom part 5 is placed with its lower straps B, C on the transport surface of the transport, whereas the second boom part 6 rotated about its longitudinal axis with the upper flange A 'on the transport surface is stored.
  • increases the transport width Br at least by more than half the system width of the boom pieces 5, 6.
  • FIG. 4 shows the advantages of the cross-sectional area according to the invention of the boom according to the invention.
  • the boom or individual lattice pieces of the boom have in crane operation the same height and width as the boom according to FIG. 3 on. Due to the rectangular triangular cross-sectional area, however, the two cantilever parts 50, 60 with their hypotenuses (distances AC and A'-C ') can be placed against each other, so that neither the transport height H nor the transport width Br are significantly greater than the geometric dimensions of a single cantilever piece 50, 60 enlarged. As a result, the prescribed or desired transport heights or transport widths can be more easily met or more jib parts can be accommodated in the same space. This applies equally for road transport, which is bound by legal regulations, as well as for container transport, for which maximum maximum dimensions are often valid.
  • FIGS. 5 and 6 refer, each sketched cross-sectional views by two folded jib parts of a crane boom for a fast-erecting crane.
  • the crane boom or at least two crane arm parts can be pivoted about a horizontally extending pivot axis 100 against each other for transport from and to the point of use, so that they are folded together during crane transport to reduce the entire crane length.
  • FIG. 5 shows a schematic representation of a conventional crane jib whose cross-section has an isosceles triangle.
  • the crane jib tip 7 is thereby folded over the pivot axis 100 by 180 ° upwards and backwards relative to the remaining stationary crane jib part 8, so that the two crane jib parts 7, 8 lie on one another.
  • the two upper straps A, A 'of the crane arm parts 7, 8 run parallel and lie against each other.
  • the transport height H of the resulting collapsed crane boom at least by the system height of the individual crane arm part 7, 8 doubled.
  • the cantilever tip 70 is folded around a horizontally extending pivot axis 100 by 180 ° upwards or rearwards.
  • the hypotenuses (Distances AB, A'-C ') of the boom cross sections of both boom parts 70, 80 are adjacent to each other, similar to the representation according to FIG. 4 ,
  • both boom parts 70, 80 to be nested for transport are connected in the operating position to staggered boom upper belts A, A '.
  • Both cantilever segments 70, 80 are constructed mirror-inverted, i. the hypotenuse is formed at the cantilever tip 70 by the distance A'-C ', whereas at the cantilever portion 80 the distance A-B represents the hypotenuse.
  • FIGS. 7a, 7b or 8a, 8b The horizontal offset of the upper belts A, A 'during crane operation is in the FIGS. 7a, 7b or 8a, 8b clarified.
  • Figure 7a shows the crane boom according to the invention in a perspective side view during the operating position and
  • FIG. 7b a perspective side view of the boom shown in transport position.
  • the Figures 8a, 8b show the FIGS. 7a, 7b associated cross-sectional representations of the crane jib in the region of the pivot axis 100.
  • the arrangement of the horizontal pivot axis 100 can be arranged depending on the desired height reduction between half the system height of the boom 80 and the plane of the upper flange A. As a result, the boom parts 70, 80 can be positioned with reduced height relative to each other only by pivoting about the axis 100 for transport in the sense of the invention.
  • FIGS. 9, 10 and 11 show an alternative embodiment of the crane boom according to the invention. Unlike in the embodiment of the invention according to the Figures 2 . 4 and 6 to 8 is chosen not a right triangular shape, but an intermediate shape between an isosceles and right-angled or almost right-angled triangle selected.
  • the angle ratio of the angles ⁇ and ⁇ in the lower chords is adjusted so that the upper chord A is off-center, that is not on the side bisector of the triangle side BC.
  • the angles are chosen according to the following rule ⁇ ⁇ ⁇ ⁇ 90 ° ,
  • the angle ⁇ relative to the angle ⁇ can be made larger.
  • FIG. 11 show the alternative boom embodiment according to FIG. 9 during the road transport analogous to FIG. 4 and in the folded state analogous to FIG. 6 .
  • This alternative embodiment results in a less than optimal space utilization, in particular with respect to the resulting height dimension, during the transport state, but this cross-sectional shape may be sufficient for many applications, since nevertheless a satisfactory gain in space over the solution known from the prior art is possible.
  • the proposed solution may have constructive advantages in terms of boom statics over the right triangular shape.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Jib Cranes (AREA)

Claims (11)

  1. Flèche de grue pour une grue, composée d'une membrure supérieure (A) et de deux membrures inférieures (B, C), qui sont reliées entre elles au moyen d'un barreaudage et forment une section transversale de flèche triangulaire,
    la section transversale de flèche présentant au moins sur certaines parties une forme de section transversale triangulaire avec une membrure supérieure s'étendant de manière excentrée,
    caractérisée en ce que
    la flèche comprend au moins une zone de flèche avec une section transversale de flèche formant un triangle isocèle, et des parties de flèche avec différentes sections transversales de flèche étant le cas échéant reliées les unes aux autres au moyen d'une pièce de transition.
  2. Flèche de grue selon la revendication 1, caractérisée en ce que la section transversale triangulaire est au moins sur certaines parties à angle droit ou presque à angle droit.
  3. Flèche de grue selon l'une des revendications précédentes, caractérisée en ce que le côté le plus long du triangle de la section transversale de flèche, en particulier l'hypoténuse, relie la membrure supérieure à une membrure inférieure de la flèche de grue.
  4. Flèche de grue selon l'une des revendications précédentes, caractérisée en ce que la flèche se compose de deux ou plusieurs morceaux de flèche démontables pour le transport sur route.
  5. Flèche de grue selon l'une des revendications précédentes, caractérisée en ce qu'au moins deux zones de flèche sont montées pivotantes l'une par rapport à l'autre sur un axe de pivotement (100), en particulier un axe de pivotement horizontal.
  6. Flèche de grue selon la revendication 5, caractérisée en ce que les au moins deux zones de flèche sont pivotantes de 180° l'une par rapport à l'autre, moyennant quoi les zones de flèche, en particulier leur côté le plus long du triangle ou hypoténuse, peuvent être posées latéralement les unes contre les autres pour le transport de la grue.
  7. Flèche de grue selon l'une des revendications précédentes, caractérisée en ce que les membrures supérieures des au moins deux zones de flèche s'étendent de manière décalée latéralement l'une par rapport à l'autre.
  8. Flèche de grue selon l'une des revendications 5 à 7, caractérisée en ce que l'axe de pivotement est disposé dans une zone entre la mi-hauteur de système de la flèche et le niveau de la membrure supérieure.
  9. Flèche de grue selon l'une des revendications précédentes, caractérisée en ce que la section transversale triangulaire comporte au moins sur certaines parties une forme intermédiaire entre un triangle isocèle et un triangle rectangle, où on a, pour les angles α et β entre la ligne de liaison des deux membrures inférieures et les lignes de liaison entre les membrures inférieures et la membrure supérieure, une des deux relations suivantes : α < β < 90 °
    Figure imgb0006
     ou β < α < 90 ° .
    Figure imgb0007
  10. Flèche de grue selon l'une des revendications précédentes, caractérisée en ce que les membrures inférieures forment une voie de translation de chariot.
  11. Grue, en particulier grue à montage rapide ou grue à tour pivotant en haut, comprenant une flèche de grue selon l'une des revendications 1 à 10.
EP14711449.0A 2013-03-22 2014-03-19 Flèche de grue et grue Active EP2976287B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013005052.9A DE102013005052A1 (de) 2013-03-22 2013-03-22 Kranausleger und Kran
PCT/EP2014/000751 WO2014146791A1 (fr) 2013-03-22 2014-03-19 Flèche de grue et grue

Publications (2)

Publication Number Publication Date
EP2976287A1 EP2976287A1 (fr) 2016-01-27
EP2976287B1 true EP2976287B1 (fr) 2019-03-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14711449.0A Active EP2976287B1 (fr) 2013-03-22 2014-03-19 Flèche de grue et grue

Country Status (5)

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US (1) US20160068375A1 (fr)
EP (1) EP2976287B1 (fr)
CN (1) CN105143090B (fr)
DE (1) DE102013005052A1 (fr)
WO (1) WO2014146791A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111302242A (zh) * 2020-03-30 2020-06-19 浙江三一装备有限公司 过渡节组件、起重机臂架和起重机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042335A1 (de) 1970-08-26 1972-03-02 Reich Fa Wilhelm Turmkran mit anlegbarer Ausleger spitze
US4253579A (en) * 1979-06-28 1981-03-03 Bucyrus-Erie Company Modular boom construction
DE3303524A1 (de) * 1983-02-03 1984-08-09 Wilhelm 5020 Frechen König Turmdrehkran
IT1164241B (it) * 1983-05-25 1987-04-08 Luigi Cattaneo Spa Gru articolata ad innalzamento automatico
DE9321390U1 (de) * 1993-05-12 1997-09-11 Liebherr-Werk Biberach GmbH, 88400 Biberach Kran mit teleskopierbarem Turm
FR2838416B1 (fr) * 2002-04-16 2004-10-01 Potain Sa Triangulation d'une poutre en treillis, notamment d'un element de fleche pour grue a tour

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN105143090B (zh) 2017-08-25
CN105143090A (zh) 2015-12-09
DE102013005052A1 (de) 2014-09-25
EP2976287A1 (fr) 2016-01-27
WO2014146791A1 (fr) 2014-09-25
US20160068375A1 (en) 2016-03-10

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