EP0499208B2 - Flèche télescopique pour grues mobiles ou analogue - Google Patents

Flèche télescopique pour grues mobiles ou analogue Download PDF

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Publication number
EP0499208B2
EP0499208B2 EP92102268A EP92102268A EP0499208B2 EP 0499208 B2 EP0499208 B2 EP 0499208B2 EP 92102268 A EP92102268 A EP 92102268A EP 92102268 A EP92102268 A EP 92102268A EP 0499208 B2 EP0499208 B2 EP 0499208B2
Authority
EP
European Patent Office
Prior art keywords
profile
legs
section
sections
telescopic
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.)
Expired - Lifetime
Application number
EP92102268A
Other languages
German (de)
English (en)
Other versions
EP0499208B1 (fr
EP0499208A2 (fr
EP0499208A3 (en
Inventor
Rudolf Becker
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 Ehingen GmbH
Original Assignee
Liebherr Werk Ehingen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Priority claimed from DE9102552U external-priority patent/DE9102552U1/de
Priority claimed from DE9113981U external-priority patent/DE9113981U1/de
Application filed by Liebherr Werk Ehingen GmbH filed Critical Liebherr Werk Ehingen GmbH
Priority to DE9218841U priority Critical patent/DE9218841U1/de
Publication of EP0499208A2 publication Critical patent/EP0499208A2/fr
Publication of EP0499208A3 publication Critical patent/EP0499208A3/de
Publication of EP0499208B1 publication Critical patent/EP0499208B1/fr
Application granted granted Critical
Publication of EP0499208B2 publication Critical patent/EP0499208B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • 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
    • B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs

Definitions

  • the invention relates to a telescopic boom for mobile cranes, consisting of one on the Vehicle or its superstructure pivoted outer link, in which several telescopically collapsible and extendable Telescopic shots are held, each shot with bearings for the shot carried in this provided and lockable with this shot and wherein a hydraulic pressure medium piston-cylinder unit to extend and retract the individual Shots are provided.
  • the individual telescopic shots essentially one box-like profile with the lower straps of the individual shots flat V-shaped profiles or have flat trough-shaped profiles that by angled from a flat middle web part Legs are formed.
  • These lower ones Belts are with the edge areas facing down pointing leg of U-shaped profiled parts with rounded corners between their web parts and legs to box-shaped Welded profiles, being in the area of Welded joints additionally stiffening strut-like sheets can be welded.
  • the individual telescopic shots are on top of each other the channel-shaped lower chords after the known from DE-PS 21 48 966 pressure distribution ratio stored, being in the area of the upper rounded corners of the box profiles the bearing forces by rolling or shaped accordingly Camp shoes are transferred.
  • the lower chord the is mainly loaded by bending forces through its V-shape or the two longitudinal, the gaps forming the channel shape are stiffened and secured against dents.
  • Telescopic booms are not only bent, but also on torsion charged. They work in the lower flange trough or V-shaped cross section arranged Bearing elements against rotation. But is the telescopic boom with a luffing needle provided, this is via a rear A-frame or the like guyed by guy ropes so that a Guide in the bearing elements that transmits torsional forces the V-shaped lower chords can be when the moment acting backwards is equal to or greater than that to the front acting and resulting from load and luffing boom weight resulting moment.
  • the object of the invention is a telescopic boom to create the type specified at the beginning, which is very rigid and resistant to buckling of his individual shots through a simple and economically producible construction distinguished.
  • the profile according to the invention exists based on its horizontal axis from different Profile parts while it's his vertical axis is symmetrical.
  • the profile according to the invention is particularly favorably the requirements of a telescopic boom fair.
  • the profiles of each A telescopic boom shots are during of the company primarily in its upper area on train and in its lower area Stressed so that the lower area is strong is sensitive to bulging.
  • Convention profiles which were either box-shaped or outgoing of a box shape with a lower V-shaped Profile parts were provided, were increased the buckling stiffness inside and / or outside in the profile stiffened sheet welded.
  • the profile according to the invention is particularly favorable Way the demands of a telescopic boom fair because the lower one is highly sensitive to bulging Area consists of a round profile, which is much less sensitive to buckling than box-shaped Profiles.
  • the sensitivity to buckling of the lower part of the profile increases with the increasing compressive stress, i.e. Towards the lower vertex line.
  • the configuration of the lower one is therefore favorable Profile part in the form of a semi-ellipse, because this in the apex area the smallest radius of curvature has and therefore in the area with the greatest compressive stress the least sensitivity to buckling owns.
  • the legs of the upper profile part are standing perpendicular to the straight line forming the top chord Bridge part. Because the upper profile part on train is claimed, the risk of buckling is low, so that the straight profile legs are accepted.
  • the top shell of each shot can be made be folded in one piece over the entire length, so that there are no welds in the draft zone and especially no transverse welds available.
  • the flat upper web part of the upper profile part also for maintenance purposes Expedient, as these can be committed safely can.
  • the upper profile part can also be used be sprayed on a rough surface, so that the required sliding security when walking is.
  • the piston rod On that of the outer link 1 bordered part is in the joint 4 the piston rod a hydraulic piston-cylinder unit 5 articulated.
  • the link piece and the other telescopic ones Shots are in the area with their ends provided collar-like stiffeners 8-10 on which Hydraulic piston cylinder units provided with locking bolts are arranged.
  • the innermost telescopic shot is, as from Fig. 1st can be seen at its outer end with a Provide roller head.
  • FIG. 2 is the cross section through a Telescopic shot or an outer link of one Telescopic boom that can be seen from a lower semi-elliptical profile part 40 and an upper semi-box-shaped profile part 41, the Legs in a horizontal parting plane welded together by welds 42, 43 are.
  • the legs 44,45 of the upper half-box-shaped Profile parts are with the upper web part 46 through curved areas 47, 48 with the bending radius RL connected.
  • the lower profile part 40 is through a shell with a semi-elliptical cross-section formed, the profile shape with great approximation an ellipse through the three radii ri, Rmi and Ri can be described.
  • the lower part has the shape of a half ellipse, which is the lower constructive Profile shell forms.
  • the lower part can for reasons of manufacture by dimension V lengthened at the top, making the dimension H2 the Top shell is shortened accordingly.
  • the compressive stress (-) is due to the risk of buckling often the most critical stress thin-walled hollow profiles.
  • the greatest bending compressive stress arises from the main load of the boom around the axis X-X (X direction) in lower vertex of radius ri.
  • the lateral load or deflection of the Boom around the Y-Y axis (Y direction) in both Direction causes in the profile sidewalls Compressive or tensile stresses, the size of which in Ratio of the distance to the axis of inertia Y-Y results.

Claims (1)

  1. Flèche télescopique (2) pour grues, de préférence des grues mobiles, constituée d'une pièce d'articulation extérieure (1) montée de façon pivotante sur le véhicule ou le châssis tournant de celui-ci, dans laquelle sont retenus plusieurs tronçons télescopiques pouvant être rentrés et sortis télescopiquement, chaque tronçon étant pourvu de logements pour le tronçon guidé dans celui-ci et pouvant être verrouillé avec ce tronçon, et une unité hydraulique à piston-et-cylindre à fluide sous pression étant prévue pour la rentrée et la sortie des tronçons individuels,
    caractérisée en ce que la pièce d'articulation (1) et les tronçons sont constitués de profils dont chacun présente, dans la position horizontale pivotée sur le véhicule, une partie inférieure (40) ronde et une partie supérieure (41) en forme de demi-caisson et dont les branches (44, 45) dirigées les unes contre les autres sont soudées les unes aux autres, en ce que la partie inférieure (40) de profil a approximativement la forme d'une demi-ellipse, le sommet étant formé par le petit rayon, en ce que les branches de la partie inférieure ronde de profil se raccordent tangentiellement aux branches rectilignes (44, 45) de la partie supérieure de profil (41), et en ce que les branches (44, 45) de la partie supérieure de profil (41) sont orientées à angle droit par rapport à la partie de traverse (46) rectiligne formant le brin supérieur.
EP92102268A 1991-02-11 1992-02-11 Flèche télescopique pour grues mobiles ou analogue Expired - Lifetime EP0499208B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9218841U DE9218841U1 (de) 1991-02-11 1992-02-11 Teleskopausleger für Fahrzeugkrane o. dgl.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE9101533 1991-02-11
DE9101533U 1991-02-11
DE9102552U DE9102552U1 (fr) 1991-02-11 1991-03-04
DE9102552U 1991-03-04
DE9113981U DE9113981U1 (fr) 1991-11-11 1991-11-11
DE9113981U 1991-11-11

Publications (4)

Publication Number Publication Date
EP0499208A2 EP0499208A2 (fr) 1992-08-19
EP0499208A3 EP0499208A3 (en) 1993-05-19
EP0499208B1 EP0499208B1 (fr) 1995-06-14
EP0499208B2 true EP0499208B2 (fr) 2001-10-17

Family

ID=27208262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102268A Expired - Lifetime EP0499208B2 (fr) 1991-02-11 1992-02-11 Flèche télescopique pour grues mobiles ou analogue

Country Status (3)

Country Link
EP (1) EP0499208B2 (fr)
AT (1) ATE123743T1 (fr)
DE (1) DE59202474D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2078693A1 (fr) 2008-01-09 2009-07-15 Kobelco Cranes Co., Ltd. Fléche télescopique

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344795A1 (de) * 1993-12-28 1995-06-29 Liebherr Werk Ehingen Fahrbarer Kran mit einem Teleskopausleger
DE19624312C2 (de) * 1996-06-18 2000-05-31 Grove Us Llc Teleskopausleger für Fahrzeugkrane
DE19711975B4 (de) * 1997-03-12 2006-09-07 Terex-Demag Gmbh & Co. Kg Teleskopausleger für Fahrzeugkrane
DE19811813B4 (de) * 1998-03-18 2005-11-24 Grove U.S. LLC (n.d.Ges.d.Staates Delaware) Seitliche Auslegerverriegelung
US6499612B1 (en) 2001-07-27 2002-12-31 Link-Belt Construction Equipment Co., L.P., Lllp Telescoping boom assembly with rounded profile sections and interchangeable wear pads
DE20120121U1 (de) * 2001-12-12 2002-03-07 Grove Us Llc Shady Grove Teleskopausleger für einen Fahrzeugkran
JP2006021877A (ja) * 2004-07-08 2006-01-26 Tadano Ltd 伸縮ブーム
DE102006014573B3 (de) * 2006-03-29 2007-07-19 Manitowoc Crane Group France SAS, Teleskopkran-Auslegerteil mit schwächer und stärker gekrümmten Querschnittssegmenten im oberen Profilteil und im unteren Profilteil
EP3363764B1 (fr) * 2015-10-13 2020-12-09 Tadano Ltd. Flèche de machine de travail

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1279493A (fr) * 1960-11-10 1961-12-22 Grue perfectionnée
DE1170134B (de) * 1962-05-11 1964-05-14 Focke Wulf Ges Mit Beschraenkt Hoehenverstellbare Arbeitsbuehne
US3250182A (en) * 1963-08-01 1966-05-10 Harold K Nansel Multiple extension apparatus
FR1415329A (fr) * 1964-12-01 1965-10-22 Ver Flugtechnische Werke Plate-forme de travail réglable en hauteur
DE2148966C3 (de) * 1971-09-30 1978-11-23 Liebherr-Werk Ehingen Gmbh, 7930 Ehingen Teleskopausleger, insbesondere für straßenverfahrbare Krane
US3842985A (en) * 1972-12-15 1974-10-22 Harnischfeger Corp Means for extending and retracting crane boom section
US4588347A (en) * 1981-10-02 1986-05-13 Coles Cranes Limited Telescopic booms
DE3216427A1 (de) * 1982-05-03 1983-11-10 Heinrich H. Klüssendorf GmbH & Co KG, 1000 Berlin Einrichtung zur fuehrung zweier axial ineinander beweglicher stangen- oder/und roehrenartiger elemente
SE456820B (sv) * 1984-03-12 1988-11-07 Oesa Ab Anordning vid teleskoparmar
DE3510710A1 (de) * 1985-03-23 1986-10-02 Fried. Krupp Gmbh, 4300 Essen Teleskopkran
US4688690A (en) * 1986-03-07 1987-08-25 Harnischfeger Corporation Method and apparatus for extending fly section of crane boom
DE9013210U1 (fr) * 1990-09-18 1991-01-03 Liebherr-Werk Ehingen Gmbh, 7930 Ehingen, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2078693A1 (fr) 2008-01-09 2009-07-15 Kobelco Cranes Co., Ltd. Fléche télescopique

Also Published As

Publication number Publication date
EP0499208B1 (fr) 1995-06-14
ATE123743T1 (de) 1995-06-15
DE59202474D1 (de) 1995-07-20
EP0499208A2 (fr) 1992-08-19
EP0499208A3 (en) 1993-05-19

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