EP2185461B1 - Forme profilée pour bras de grue - Google Patents

Forme profilée pour bras de grue Download PDF

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Publication number
EP2185461B1
EP2185461B1 EP08782836A EP08782836A EP2185461B1 EP 2185461 B1 EP2185461 B1 EP 2185461B1 EP 08782836 A EP08782836 A EP 08782836A EP 08782836 A EP08782836 A EP 08782836A EP 2185461 B1 EP2185461 B1 EP 2185461B1
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EP
European Patent Office
Prior art keywords
crane
set forth
crane boom
intersection point
boom
Prior art date
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Application number
EP08782836A
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German (de)
English (en)
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EP2185461A1 (fr
Inventor
Eckhard Wimmer
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.)
Palfinger AG
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Palfinger AG
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Application filed by Palfinger AG filed Critical Palfinger AG
Priority to PL08782836T priority Critical patent/PL2185461T3/pl
Publication of EP2185461A1 publication Critical patent/EP2185461A1/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
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic

Definitions

  • the present invention relates to a crane arm having the features of the preamble of claim 1.
  • a crane arm with some features of the preamble of claim 1 is shown for example in FIG EP 583 552 B1 shown.
  • This crane arm has the disadvantage that, in particular when installed in a boom system in the upper region of the crane arm an unfavorable force is applied. Furthermore, the production of such a crane arm is relatively expensive.
  • a crane arm with the features of the preamble of claim 1 is from the DE 23 17 595 A1 out.
  • the object of the invention is to solve the discussed problems of the prior art.
  • a real crane arm has both an outer contour and an inner contour.
  • the "imaginary contour line” refers to the outer contour of the crane arm.
  • centroid is the center of gravity of the entire area enclosed by the imaginary contour line (FIG. Fig. 2 ) Understood.
  • the term “centroid” should therefore not be understood in relation to the enclosed between the outer and inner contour surface.
  • the measures according to the invention cause the crane arm can be made of a single sheet.
  • the upper part of the crane arm can be used as a whole for the introduction of force, in particular between the boom extensions when installed in a boom system.
  • By rejuvenating the contour line At the top there is a favorable ratio of Schehkelin to sheet thickness.
  • By the invention the use of thinner sheets is possible, as was the case in the prior art.
  • the invention further relates to a boom system for a crane, wherein at least one boom and / or a boom extension are designed as a crane arm according to one of claims 1 to 9.
  • at least one boom and / or a boom extension are designed as a crane arm according to one of claims 1 to 9.
  • Fig. 1a shows a first embodiment of the course of the imaginary contour line of the crane arm in a transverse plane of the crane arm.
  • Transverse plane is understood to mean a plane which is pierced orthogonally by the longitudinal axis of the crane arm.
  • All crane arms according to the invention have an axis of symmetry s arranged in the transversal plane, with respect to which the contour line of the crane arm in the transverse plane runs at least approximately mirror-symmetrically.
  • this symmetry axis s represents the intersecting line of the transverse plane with the plane of symmetry (median plane) along the longitudinal axis.
  • the contour line intersects the symmetry axis s in a first one and a second intersection S 1 , S 2 .
  • the center point M arranged equidistant to the first and the second intersection point S 1 , S 2 on the symmetry axis s represents the position of the half height of the crane arm in the transversal plane.
  • Starting from the midpoint M in the direction of the intersection point S 2 one finds himself in an area of the Crane arm, which is loaded in operation mainly to train.
  • the area of the crane arm lying between the midpoint M and the first intersection S1 is subjected essentially to pressure during operation.
  • the in Fig. 1 illustrated course of the contour line of the crane arm has four mutually distinguishable sections k 1 , g 1 , g 2 , g 3 .
  • the arranged in the region of the largest in the operating pressure load section k 1 is arc-shaped, as this cross-sectional shape, as is known, has reduced compressive stresses and reduction of Beulgefährdung. It is sufficient if this section is in the sense at least approximately circular arc-shaped, as it can be approximated by a polygon, as in the Fig. 1b and 1c is shown.
  • the approximation of the circular arc-shaped portion k 1 by a polygonal line allows for easier production by folding the sheet metal forming the crane arm.
  • a circular arc-shaped formation can be realized by means of a rolling process.
  • the circular arc-shaped section k 1 can also be approximately circular arc-shaped in the sense that it can be formed, for example, by one or more elliptical sections with a correspondingly low eccentricity. It would also be conceivable to form a circular-arc-shaped section k 1 by a series of correspondingly short, straight-line, elliptical and / or circular-arc-shaped segments.
  • the circular arc-shaped portion k 1 is formed as a quarter circle arc, that is, extends over an angle of approximately 90 degrees. This makes it possible to form the majority of the course of the contour line between the first intersection S 1 and the center M in the form of a circular arc-shaped portion k 1 .
  • Particularly preferred is the in Fig. 1 illustrated variant in which the center of curvature K of the circular arc-shaped portion k 1 is in the vicinity or on the axis of symmetry s and the center of curvature K of the circular arc-shaped portion k 1 between the first intersection S 1 and the center M is located.
  • the circular arc-shaped portion k 1 may well extend to the first intersection point S 1 . In this case, therefore, the entire contour line in the region of the intersection S 1 and the point M is formed as a circular arc-shaped portion k 1 .
  • Fig. 1 illustrated embodiment in which tangentially to the circular arc-shaped portion k 1 in the direction of the first intersection S 1, a third rectilinear section g 3 connects, which includes with the axis of symmetry s an angle ⁇ smaller than 90 degrees. (here the angle ⁇ is about 72 degrees).
  • the angle is preferably less than 80 degrees.
  • the angle ⁇ is greater than 70 degrees.
  • the center of curvature K of the circular arc-shaped portion k 1 is located directly on the axis of symmetry s between the center M and the first intersection point S. 1 Unlike shown, the point of curvature K can also be arranged slightly offset from the axis of symmetry s. However, it should always be in the area between the center M and the first intersection S 1 .
  • the acute angle ⁇ encloses an acute angle ⁇ with the symmetry axis s, which is approximately 18 degrees in the exemplary embodiment shown.
  • the acute angle ⁇ can also be in a range greater than 10 degrees, preferably greater than 15 degrees. In each case, an upper limit of 25 degrees is preferred, in order to rule out a flat course of the straight-line section g 1 .
  • the second rectilinear section g 2 with the axis of symmetry s an angle ⁇ , which is smaller than 90 degrees (in the embodiment of the Fig. 1 the angle ⁇ is about 65 degrees). Particularly preferred is a range for the angle ⁇ less than 70 degrees. The angle ⁇ should, however, be greater than 60 degrees in this embodiment.
  • the second rectilinear portion g 2 which ends in a curve in the form of a Kantung 7, has the advantage that thereby in the area around the top of the crane arm around a favorable local force introduction, such as in the support of GleitVolen between each boom extensions takes place.
  • the short leg length results in a favorable ratio between the sheet thickness and the leg length, so that a deformation of the crane arm is prevented in the upper area.
  • the contour profile in this area in the form of a second circular arc-shaped section k 2 (see FIG Fig. 3 ) .
  • Such training does not form part of the invention.
  • this represents only a special variant of the more general idea, namely that the contour line ends in a rounding at the symmetry line s.
  • the rounding could, for example, also be designed as an edging 7, as in FIG Fig. 1 shown.
  • centroid F of the area enclosed by the contour line in the transverse plane, lies in a region between the plane Center M and the first intersection S 1 , that is below half the height of the crane arm is located.
  • the cross-sectional concentration of the crane arm is displaced as possible in the pressure zone down, resulting in a lower compressive stress component.
  • the contour line of all exemplary embodiments between the first intersection point S 1 and the second intersection point S 2 has an extreme point E with a maximum distance e from the axis of symmetry s.
  • the distance D between the first intersection and the second intersection S 1 , S 2 can be at least twice as large as the distance e.
  • the distance D is at least two and a half times, particularly preferably 2.75 times as large as the distance e.
  • the distance D may each be less than three times the distance e.
  • the distance d of the contour line from the symmetry axis s at approximately one quarter of the distance D between the first and the second intersection S 1 , S 2 starting from the second intersection S 2 is less than or equal to 0.8 times the maximum distance e is.
  • the extreme point E between the center M and the first intersection S 1 is approximately at the height of the center of curvature K.
  • the course shown has the contour line only a single extreme point E, that is, both in the direction of the first point of intersection S 1 and in the direction of the second point of intersection S 2 decreases starting from the extreme point E, the width of the crane arm.
  • the Fig. 1e shows for the embodiment of Fig. 1 the position of the centroid F between the center M and the first intersection S 1 on the axis of symmetry s.
  • the centroid F refers to the in Fig. 2 dash-dotted area, ie on the entire surface, which is enclosed by the imaginary contour line (corresponding to the outer contour).
  • a boom system 5 is shown with a boom extension, wherein in addition the storage of the boom system 5 via a bearing element 1 and the bearing of the boom extension in the boom via bearing elements 2 is shown.
  • the illustrated embodiment is meant to be purely exemplary in relation to the number of boom extensions shown.
  • the same bearing elements can be used with boom systems 5 with any number of boom extensions.
  • Fig. 1g two crane arms are shown, which is for example a boom extension arranged in a boom.
  • the arcuate section k 1 is approximated by different polygons.
  • the internal cross-sectional profile has fewer bends in the region of the circular-arc-shaped portion, which may be advantageous in particular for small profiles due to production.
  • the production of a crane arm according to the invention can be carried out, for example, such that the crane arm is formed from two shells, which are formed in mirror image to each other and wherein one of the shells in each case corresponds to one of the embodiments.
  • the two shells can be connected, for example welded, in the region of the first point of intersection S 1 and of the second point of intersection S 2 .
  • the crane arm at least along a portion of its longitudinal extent, from a single sheet which is suitably shaped and subsequently closed along a single line (for example, welded) is.
  • This line can run, for example, in the area of the first intersection point S 1 or of the second intersection point S 2 .
  • the shaping of the sheets can be done in a known manner or by folding and / or rolling and, for example, welding.
  • the outer contour should preferably remain the same and the sheet thickness should be applied inwards.
  • the Fig. 4 shows by way of example a boom system 5 with a boom extension arranged in a boom.
  • a commercial vehicle 3 is shown on which a crane 4 according to the invention is arranged.
  • the crane 4 has a boom system 5 according to the invention, it being possible for the individual boom extensions to be moved telescopically relative to one another via thrust cylinders 6.
  • the telescopic movability can also be ensured by other drive means.
  • an unrepresented charging structure could be arranged in the rear region of the commercial vehicle 3, for example.

Landscapes

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

Claims (13)

  1. Bras de grue pour une grue (4) avec un axe longitudinal et une ligne de contour imaginaire, réalisée au moins par sections de manière linéaire et s'étendant au moins approximativement de manière symétrique dans un plan transversal par rapport à un axe de symétrie (s), la ligne de contour coupant l'axe de symétrie (s) dans un premier et un second point d'intersection (S1, S2) et se rétrécissant en direction du second point d'intersection (S2) au moins avant le dernier tiers de la distance entre le premier et le second point d'intersection (S1, S2), le rétrécissement de la ligne de contour se poursuivant jusqu'au second point d'intersection (S2) et se terminant en un arrondi sur la ligne de symétrie (s), la ligne de contour présentant, entre le premier point d'intersection (S1) et un point médian (M) disposé à équidistance des premier et second points d'intersection (S1, S2), au moins en partie une section (k1) au moins approximativement en arc de cercle qui est réalisée de préférence comme un quart de cercle et en ce que le point médian de courbure (K) de la section (k1) en arc de cercle se situe sur ou à proximité de l'axe de symétrie (s) et de préférence entre le premier point d'intersection (S1) et le point médian (M), et la ligne de contour présentant une section linéaire (g1), dont le prolongement (g1') imaginaire coupe, en direction du second point d'intersection (S2), l'axe de symétrie (s) selon un angle de préférence aigu (β), caractérisé en ce qu'une seconde section (g2) linéaire qui se termine en arrondi, est contigüe à la première section (g1) linéaire.
  2. Bras de grue selon la revendication 1, caractérisé en ce que l'arrondi est réalisé comme une pliure (7).
  3. Bras de grue selon la revendication 1 ou 2, caractérisé en ce que la seconde section linéaire (g2) est directement contigüe sur la première section linéaire (g1) ou en ce que la seconde section (g2) linéaire est reliée par une autre section réalisée de préférence courbée à la première section linéaire (g1).
  4. Bras de grue selon la revendication 3, caractérisé en ce que l'angle aigu (β) est supérieur à 10 degrés, de préférence supérieur à 15 degrés et de préférence inférieur à 25 degrés.
  5. Bras de grue selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la section linéaire (g1) est réalisée comme une suite tangentielle de la section en arc de cercle (k1).
  6. Bras de grue selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la section en arc de cercle (k1) est approchée par un polygone.
  7. Bras de grue selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le bras de grue se compose d'au moins une tôle et l'épaisseur de la tôle de toutes les sections (k1, k2, g1, g2, g3) du bras de grue dans le plan transversal est au moins sensiblement de même taille.
  8. Bras de grue selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le bras de grue se compose de deux coques qui sont formées de manière inversée l'une par rapport à l'autre et sont reliées entre elles de préférence dans la zone du premier point d'intersection (S1) et du second point d'intersection (S2).
  9. Bras de grue selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le bras de grue se compose, au moins le long d'une section de son étendue longitudinale, d'une seule tôle fermée le long d'une seule ligne qui s'étend de préférence dans la zone du premier point d'intersection (S1) ou du second point d'intersection (S2).
  10. Système de flèche pour une grue, caractérisé en ce qu'au moins une flèche et/ou un prolongement de flèche est réalisé comme un bras de grue selon l'une quelconque des revendications 1 à 9.
  11. Système de flèche selon la revendication 10, caractérisé en ce que les formes de la ligne de contour de la flèche et des lignes de contour de tous les prolongements de flèche sont identiques, le cas échéant mis à part le degré d'approximation des arcs de cercle par des polygones.
  12. Grue, en particulier grue de chargement, caractérisée par un bras de grue selon l'une quelconque des revendications 1 à 9 ou un système de flèche (5) selon la revendication 10 ou 11.
  13. Véhicule utilitaire (3) avec une grue (4) selon la revendication 12.
EP08782836A 2007-09-05 2008-08-29 Forme profilée pour bras de grue Active EP2185461B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08782836T PL2185461T3 (pl) 2007-09-05 2008-08-29 Kształt profilu dla ramienia dźwigu

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT5302007 2007-09-05
PCT/AT2008/000308 WO2009029966A1 (fr) 2007-09-05 2008-08-29 Forme profilée pour bras de grue

Publications (2)

Publication Number Publication Date
EP2185461A1 EP2185461A1 (fr) 2010-05-19
EP2185461B1 true EP2185461B1 (fr) 2013-01-30

Family

ID=40042747

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Application Number Title Priority Date Filing Date
EP08782836A Active EP2185461B1 (fr) 2007-09-05 2008-08-29 Forme profilée pour bras de grue

Country Status (10)

Country Link
EP (1) EP2185461B1 (fr)
CN (1) CN101827775B (fr)
BR (1) BRPI0816453B1 (fr)
CA (1) CA2697301C (fr)
DK (1) DK2185461T3 (fr)
ES (1) ES2405544T3 (fr)
MX (1) MX2010002602A (fr)
PL (1) PL2185461T3 (fr)
RU (1) RU2499763C2 (fr)
WO (1) WO2009029966A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010008113B4 (de) * 2010-02-15 2011-12-08 Gerhard Dücker GmbH & Co. KG Landmaschinenfabrik Arbeitsfahrzeug mit zumindest einem Anbaurahmen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2317595A1 (de) * 1973-04-07 1974-10-31 Kaspar Klaus Teleskopierbare einheit, insbesondere fuer hebezeuge

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015599A1 (de) * 1980-04-23 1981-10-29 Peter Dipl.-Ing. Dr. 4000 Düsseldorf Eiler Teleskopierbarer kranausleger
SU1677012A1 (ru) * 1989-04-03 1991-09-15 Соломбальский машиностроительный завод Телескопическа стрела грузоподъемного механизма
JPH03100280U (fr) * 1990-01-29 1991-10-21
DE9210902U1 (de) * 1992-08-14 1992-12-24 Liebherr-Werk Ehingen Gmbh, 7930 Ehingen Teleskopausleger für Fahrzeugkrane o.dgl.
EP1302435B1 (fr) * 2001-10-16 2018-03-07 EFFER S.p.A. Flèche télescopique à haute résistance
CN2714524Y (zh) * 2004-04-30 2005-08-03 长沙中联重工科技发展股份有限公司浦沅分公司 一种起重机用吊臂
CN2830359Y (zh) * 2005-10-17 2006-10-25 长沙中联重工科技发展股份有限公司 一种起重机用吊臂

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2317595A1 (de) * 1973-04-07 1974-10-31 Kaspar Klaus Teleskopierbare einheit, insbesondere fuer hebezeuge

Also Published As

Publication number Publication date
WO2009029966A1 (fr) 2009-03-12
PL2185461T3 (pl) 2013-09-30
CA2697301C (fr) 2015-02-17
CN101827775A (zh) 2010-09-08
CA2697301A1 (fr) 2009-03-12
RU2010112843A (ru) 2011-10-10
RU2499763C2 (ru) 2013-11-27
CN101827775B (zh) 2014-11-12
EP2185461A1 (fr) 2010-05-19
ES2405544T3 (es) 2013-05-31
MX2010002602A (es) 2010-03-31
BRPI0816453A2 (pt) 2015-03-03
BRPI0816453B1 (pt) 2020-05-19
DK2185461T3 (da) 2013-04-29

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