EP1321427B1 - Flèche télescopique - Google Patents

Flèche télescopique Download PDF

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Publication number
EP1321427B1
EP1321427B1 EP02090408A EP02090408A EP1321427B1 EP 1321427 B1 EP1321427 B1 EP 1321427B1 EP 02090408 A EP02090408 A EP 02090408A EP 02090408 A EP02090408 A EP 02090408A EP 1321427 B1 EP1321427 B1 EP 1321427B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
telescopic boom
inner section
cylinder system
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
EP02090408A
Other languages
German (de)
English (en)
Other versions
EP1321427A1 (fr
Inventor
Erik Appel
Martin Bauer
Klaus Conrad
Michael Dammer
Jens Fery
Rolf Heintz
Steffen Holzer
Christoph Passmann
Mario Rübel
Sascha Scholz
Uwe Seel
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.)
Terex Demag GmbH and Co KG
Original Assignee
Terex Demag GmbH and Co KG
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Publication date
Application filed by Terex Demag GmbH and Co KG filed Critical Terex Demag GmbH and Co KG
Publication of EP1321427A1 publication Critical patent/EP1321427A1/fr
Application granted granted Critical
Publication of EP1321427B1 publication Critical patent/EP1321427B1/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, in particular a telescopic boom for a mobile crane, with the features mentioned in the preamble of claim 1.
  • Telescopic booms with hydraulic telescoping systems have been around for many years known.
  • DE-A-198 24 672 a crane with a telescopic boom described.
  • the telescopic boom has a base box in which several Inner boxes are guided substantially coaxially with each other.
  • the inner boxes can successively by a hydraulic cylinder / piston system optionally on and be extended.
  • the hydraulic cylinder / piston system is here at one his two axial ends (foot area) fixed in the base box and with his extendable part by means of a coupling device to each to be moved Inner box can be coupled.
  • This coupling device is also called backup and Locking unit called.
  • the extendable part of the cylinder / piston system can optionally in the piston rod or in the hydraulic cylinder exist.
  • the inner boxes may each be in their retracted and in their extended position by one of the locking and locking unit operable Verbolzungs adopted opposite the next larger inner box or (in the case of the outermost inner box) with the Basic box of the telescopic boom are locked mechanically, so no relative shift against each other is more possible.
  • an inner box is the Verbolzungs adopted after coupling the Locking and locking unit unlockable by the latter.
  • the extension length of the hydraulic cylinder / piston system corresponds in this known solution of axial length of the longest inner box to be moved. In the extended Position is the length of the hydraulic cylinder / piston system thus virtually double so long.
  • the Austeleskopieren the einzeeen inner boxes is in contrast to the Telescopic boom according to DE-A-198 24 672 in this solution not in a single Step, but in two steps.
  • the lower is first Locking and locking unit actuated and the respective inner box to about its half extended extension extended and locked in this intermediate position. Then the cylinder returns to its original position. Once this is reached, the upper securing and locking unit is in a position about the position of the lower locking and locking unit at the end of first extension step corresponds.
  • the second security and locking unit is Starting position back to the lower security and locking unit grab the next inner box.
  • Object of the present invention is to provide a telescopic boom further develop generic type such that at the lowest possible Weight for the drive system The time for the extension of an inner box in his maximum extension position is significantly shortened.
  • the present invention is based on a telescopic boom, in particular for Mobile cranes is provided and has a base box in which one or more Inner boxes are guided substantially coaxially with each other. These inner boxes are successively by a first hydraulic cylinder / piston system either on or extendable, with this hydraulic cylinder / piston system on one of its two axial ends (foot region, i.e. lower in the working position of the telescopic boom End) is fixed in the base box and with its extendable part by means of a Locking and locking unit to the respective inner box to be moved can be coupled.
  • the respective inner box is in its retracted and in its extended position in each case by one of the locking and locking unit operable Verbolzungs adopted compared to the next larger inner box mechanically lockable, so that then no relative displacement between the Inner boxes can be done more.
  • the outermost inner box can be in his extended position relative to the base box by means of the safety and Locking device can be locked and unlocked.
  • the invention provides that in parallel to the first hydraulic cylinder / piston system a second hydraulic cylinder / piston system is arranged, which is also with one of its two axial ends in Base box is fixed and with its extendable part by means of a coupling device on the outermost inner box on and can be decoupled.
  • each cylinder / piston systems are by an appropriate (preferably electronic) control in Counter run operable.
  • the extendable length of the each cylinder / piston systems each is significantly smaller than the extendable length of the respective inner box. This is offset by a significant weight reduction Fully hydraulic telescopic system or even with single cylinder systems given whose cylinder length is about the length of each structurallyden Telescope shots corresponds.
  • Another important feature is the fact that the respective inner box by means of the second hydraulic cylinder / piston system together with all possibly still existing larger inner boxes, the so not yet telescoped, from the retracted position over a first section the entire extendable length of the respective inner box movable and subsequently by means of the first hydraulic cylinder / piston system after Coupling of its locking and locking unit via a second section the entire extendable length of the respective inner box to its desired End position can be moved and locked there, wherein at the same time, if necessary still existing larger inner boxes together with the largest Inner box coupled second cylinder / piston system in the retracted position (Starting position) are traversable and in the case of extension of the largest, ie of the outermost inner box the second hydraulic cylinder / piston system with its Coupling device after coupling the securing and locking unit of first cylinder / piston system can be decoupled from the outermost inner box.
  • the Austeleskopieren the individual shots thus takes place in the form that by the second cylinder / piston system in each telescoping first the entire Package of inner boxes is moved relative to the base box to the outside via a Section of the maximum extension path until a position is reached at which the Locking and locking unit of the first cylinder / piston system to the smallest each not yet in the desired manner austeleskop elected inner box to unlock it and to further push it out until the for this inner box desired extension position is reached and locked. While this movement over the second part of the extension movement becomes the rest Package of not yet telescoped telescopic shots from the second Cylinder-piston unit moved back to its original position.
  • the extendable length of the two cylinder / piston systems each significantly smaller than the extendable length of the respective inner box.
  • the extendible length of the two cylinder / piston systems in the range of about 40% - 60%, in particular at about 50% of the largest extendable length of an inner box.
  • the invention provides that the two ZylinderlKolben systems have different diameters, so on different hydraulic power are designed.
  • the two can Cylinder / piston systems are arranged horizontally next to each other, but there in the General the profile cross sections of telescopic extenders in vertical direction (height) are larger than in the horizontal direction (width), it is recommended, the two Cylinder / piston systems with respect to the load plane of the telescopic boom on top of each other to arrange, preferably the first cylinder / piston system with the smaller Diameter above the second cylinder / piston system with the larger diameter.
  • the two cylinder / piston systems via slide rails support each other.
  • the cylinder / piston systems each with its cylinder in the Base box to fix and the piston rod as a moving part of the cylinder / piston system to work.
  • This brings advantages in terms of attachment of the Supply lines for the pressure medium supply of the hydraulic cylinder.
  • the reverse Of course arrangement is also possible and brings advantages in other respects.
  • an inventive telescopic boom 1 is fully retracted State shown. It has a base box 2 by a total of four telescopic inner boxes 3 - 6 are slidably guided into each other. At the left end of the innermost inner box 3 is a equipped with pulleys head 31 of the Telescopic boom 1 arranged over which a not shown hoist rope are guided can. At the bottom of the ground box 2, which at its right end (foot area) a pivot bearing 18 for adjusting the inclination of the telescopic boom 1, is a bearing 11 is mounted, which is the pivot point for a not shown hydraulic Wippzyfinder for moving the telescopic boom 1 in his Working position forms.
  • the inner boxes 3 - 5 are in the retracted position respectively about arranged in the foot area locking bolt 22, 22 ', 22 "with the next larger inner box 4-6 mechanically locked.
  • the e.g. at 45%, 90% and 100% of the permissible extension length of the respective inner boxes are positioned as shown in Fig. 1 by corresponding arrows with the associated Figures are indicated.
  • the inner boxes are two superimposed hydraulic cylinder / piston systems 7, 8 are provided.
  • the Length of the cylinder / piston systems 7, 8 is in the retracted state at about the half length of the basic box 2.
  • the arrangement of the cylinder / piston systems 7, 8 is in particular also be removed from FIG. 2, the example of a section across the Longitudinal axis of the telescopic boom through the base box 2 and the largest Inner box 6 shows.
  • the inner box 6 is over the partially only schematically indicated lubricated sliding bearings 27 and 28 slidably guided in the base box 2.
  • the lower cylinder / piston system 7 has a cylinder 9 and a piston rod 10 and is by means of a fastening 17 which at the right end of the piston rod 10th is arranged, fixed in the foot region of the base box 2.
  • the extendable part of the Cylinder / piston system 7 thus exists in the cylinder 9.
  • a support roller 30 through which the cylinder / piston system 7 during the Extension on the inside of the inner boxes 3 - 6 can support, so it does not Tilts at the transitions between two extended inner boxes comes.
  • an example hydraulically actuatable coupling device 29 is provided, by means of which the lower (right) end of the Cylinder 9 of the cylinder / piston system 7 coupled to the outermost inner box 6 can be. This is shown in Fig. 2 in more detail.
  • the locking and locking unit 12 has over a gripper 19 activatable by means of an actuator 15 (e.g., hydraulically), with which the for the respective inner box (in Fig. 2, the inner box 6) for mechanical Lock provided locking pin 22 can be locked and unlocked.
  • an actuator 15 e.g., hydraulically
  • Fig. 3 represent different stages of the extension process, in individual closer to each other. This will be explained below starting from the upper part of the picture to the bottom Teitstory explained in more detail.
  • FIG. 3 shows the telescopic boom 1, after the Coupling device 29 of the cylinder / piston system 7 to the outermost inner box. 6 has coupled and this together with the interlocked another Inner boxes 3 - 5 about half the length of the base box 2 in one position in which the securing and locking unit 12 of the upper Cylinder / piston system 8 can be coupled to the innermost inner box 3.
  • the gripper 19 of the safety and Locking unit 12 of the associated locking pin 22 solved and the Inner box 3 extended by the movement of the cylinder 13 to the left.
  • the cylinder 9 of the lower cylinder / piston system 7, which continues to the outermost inner box 6 remains docked, again to the right in the original Move home position (retracted position).
  • the telescoping movement of the telescopic boom according to the invention leads to a nearly continuous extension movement of the boom head 31, so that very short telescoping times can be guaranteed. Because of the comparatively short overall lengths of the used cylinder / piston systems, the weight for the Actuators of the telescopic boom are significantly reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Claims (8)

  1. Flèche télescopique, en particulier flèche télescopique (1) pour une grue mobile, comportant un caisson de base (2) dans lequel un ou plusieurs caissons intérieurs (3 - 6) sont guidés les uns dans les autres essentiellement de façon coaxiale, lesquels peuvent être au choix sortis ou rentrés les uns après les autres par un premier système hydraulique à piston et cylindre (8), le premier système hydraulique à piston et cylindre (8) étant fixé à l'une de ses deux extrémités axiales (zone de pied) dans le caisson de base (2) et pouvant être accouplé avec sa partie pouvant être sortie au caisson intérieur (3 - 6) à déplacer au moyen d'une unité d'arrêt et de verrouillage (12), et le caisson intérieur (3 - 6) concerné pouvant être verrouillé mécaniquement dans sa position rentrée et dans sa position sortie par rapport au caisson intérieur immédiatement supérieur (4 - 6) par un dispositif de liaison à boulons pouvant être actionné par l'unité d'arrêt et de verrouillage (12) et pouvant être déverrouillé après la réalisation de l'accouplement juste avant le déplacement, et le caisson intérieur le plus extérieur (6) pouvant être verrouillé et déverrouillé dans sa position sortie par rapport au caisson de base (2) au moyen de l'unité d'arrêt et de verrouillage (12),
    caractérisée en ce que
    il est agencé, parallèlement au premier système hydraulique à piston et cylindre (8), un second système hydraulique à piston et cylindre (7), lequel est également fixé dans le caisson de base (2) avec l'une de ses deux extrémités axiales et peut être accouplé et désaccouplé avec sa partie pouvant être sortie au caisson intérieur le plus extérieur (6) au moyen d'un dispositif d'accouplement; (29),
    les deux systèmes à piston et cylindre (7, 8) peuvent être actionnés en mouvement contraire,
    la longueur déployable de chacun des deux systèmes à piston et cylindre (7, 8) est nettement inférieure à la longueur déployable de chaque caisson intérieur (3 - 6) et
    chaque caisson intérieur (3 - 6) peut être déplacé au moyen du second système hydraulique à piston et cylindre, en même temps que, le cas échéant, tous les caissons intérieurs plus grands (4 - 6) encore disponibles, hors de la position rentrée sur un premier tronçon partiel de la longueur déployable totale du caisson intérieur (3 - 6) concerné et peut être ensuite déplacé au moyen du premier système hydraulique à piston et cylindre (8) après accouplement de son unité d'arrêt et de verrouillage (12) sur un second tronçon partiel de la longueur déployable totale du caisson intérieur (3 - 6) concerné jusque dans sa position de fin de course souhaitée, et verrouillé dans cette position, les caissons intérieurs plus grands (4 - 6) encore disponibles, le cas échéant, pouvant être rétractés dans la position rentrée (position de départ) en même temps que le second système à piston et cylindre (7) accouplé au caisson intérieur le plus grand (6) et le second système hydraulique à piston et cylindre (7) pouvant être désaccouplé du caisson intérieur le plus extérieur (6) avec son dispositif d'accouplement (29) après l'accouplement de l'unité d'arrêt et de verrouillage (12) du premier système à piston et cylindre (8), en cas de déploiement du caisson intérieur le plus grand (le plus extérieur) (6).
  2. Flèche télescopique selon la revendication 1,
    caractérisée en ce que la longueur déployable des deux systèmes à piston et cylindre (7, 8) est comprise entre 40 % et 60 % de la longueur déployable la plus grande d'un caisson intérieur (3 - 6), en particulier égale à 50 % de cette longueur.
  3. Flèche télescopique selon l'une des revendications 1 ou 2,
    caractérisée en ce que les deux systèmes à piston et cylindre (7, 8) sont configurés pour des forces de télescopage différentes, en particulier par le fait qu'ils présentent des diamètres différents.
  4. Flèche télescopique selon l'une des revendications 1 à 3,
    caractérisée en ce que les deux systèmes à piston et cylindre (7, 8) sont agencés l'un au-dessus de l'autre par rapport au plan de charge de la flèche télescopique (1).
  5. Flèche télescopique selon l'une des revendications 3 ou 4,
    caractérisée en ce que le premier système à piston et cylindre (8) présente le diamètre le plus petit.
  6. Flèche télescopique selon l'une des revendications 3 à 5,
    caractérisée en ce que le premier système à piston et cylindre (8) est agencé au-dessus du second système à piston et cylindre (7).
  7. Flèche télescopique selon l'une des revendications 1 à 6,
    caractérisée en ce que les deux systèmes à piston et cylindre (7, 8) sont appuyés l'un sur l'autre, notamment par l'intermédiaire de glissières (26).
  8. Flèche télescopique selon l'une des revendications 3 à 7,
    caractérisée en ce que chacun des systèmes à piston et cylindre (7, 8) est fixé avec son cylindre (9, 13) dans le caisson de base (2) et en ce que la tige de piston (10, 14) forme la partie mobile du système à piston et cylindre.
EP02090408A 2001-12-21 2002-12-17 Flèche télescopique Expired - Lifetime EP1321427B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10164601 2001-12-21
DE10164601A DE10164601C2 (de) 2001-12-21 2001-12-21 Teleskopausleger

Publications (2)

Publication Number Publication Date
EP1321427A1 EP1321427A1 (fr) 2003-06-25
EP1321427B1 true EP1321427B1 (fr) 2005-03-16

Family

ID=7711226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02090408A Expired - Lifetime EP1321427B1 (fr) 2001-12-21 2002-12-17 Flèche télescopique

Country Status (3)

Country Link
EP (1) EP1321427B1 (fr)
AT (1) ATE290993T1 (fr)
DE (2) DE10164601C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009009944B4 (de) * 2009-02-20 2011-02-24 Terex-Demag Gmbh Sicherungs- und Verbolzungseinheit
EP2465809B1 (fr) * 2010-12-17 2014-02-12 Manitowoc Crane Group France SAS Système de télescopage pour flèche et flèche auxiliaire
RU2723523C1 (ru) * 2019-12-23 2020-06-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тихоокеанский государственный университет" Стрела грузоподъёмной машины

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4433515A (en) * 1981-11-04 1984-02-28 Kidde, Inc. Remotely operable latch and locking pin for a multi-section boom including a manual fly section
US4688690A (en) * 1986-03-07 1987-08-25 Harnischfeger Corporation Method and apparatus for extending fly section of crane boom
DE19616167A1 (de) * 1996-04-11 1997-10-16 Mannesmann Ag Teleskopausleger, insbesondere für stationäre oder fahrbare Krane
DE19824671C2 (de) * 1997-05-28 2002-09-19 Mannesmann Ag Kran mit einem Teleskopausleger
DE29912814U1 (de) * 1999-07-22 1999-12-02 Buerkert Werke Gmbh & Co Zapfsystem für Tanksäulen
EP1072554B1 (fr) * 1999-07-30 2004-03-17 Liebherr-Werk Ehingen GmbH Grue à flèche téléscopique

Also Published As

Publication number Publication date
DE10164601A1 (de) 2003-07-10
EP1321427A1 (fr) 2003-06-25
DE10164601C2 (de) 2003-12-18
DE50202472D1 (de) 2005-04-21
ATE290993T1 (de) 2005-04-15

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