EP2386517B1 - Flèche de grue, notamment flèche de grue mobile dotée d'éléments de traction prétendus - Google Patents

Flèche de grue, notamment flèche de grue mobile dotée d'éléments de traction prétendus Download PDF

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Publication number
EP2386517B1
EP2386517B1 EP11160100A EP11160100A EP2386517B1 EP 2386517 B1 EP2386517 B1 EP 2386517B1 EP 11160100 A EP11160100 A EP 11160100A EP 11160100 A EP11160100 A EP 11160100A EP 2386517 B1 EP2386517 B1 EP 2386517B1
Authority
EP
European Patent Office
Prior art keywords
jib
tensile elements
part according
jib part
sensors
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.)
Not-in-force
Application number
EP11160100A
Other languages
German (de)
English (en)
Other versions
EP2386517A1 (fr
Inventor
Franz Paschke
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.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
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
Application filed by Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Publication of EP2386517A1 publication Critical patent/EP2386517A1/fr
Application granted granted Critical
Publication of EP2386517B1 publication Critical patent/EP2386517B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs

Definitions

  • the invention relates to a boom, especially a crane boom, in particular a mobile crane boom according to the preamble of claim 1.
  • the object of the invention is to optimize the construction with respect to the stresses. It is solved by the subject matter of claim 1; the subclaims define advantageous embodiments.
  • One or more prestressed tension elements can therefore be integrated into a hybrid construction and checked with the aid of sensors.
  • the material can be better utilized.
  • the signals can be included in the load torque limit to control the bending moments.
  • the measured values are an essential part of the control process and the safety system.
  • the compressive stress in the forming shell can be kept nearly constant as the tensile stress in the adjacent biasing elements decreases. Accordingly, prestressing forces remain almost constant in the tensile area with a simultaneous decrease in the compressive stress in the shell. Simultaneous monitoring with sensors significantly increases safety and usability.
  • Lightweight constructions are of vital importance in crane construction and above all in jib construction. Filigree constructions and the use of lightweight, high-strength materials by utilizing the favorable-acting bias make the boom parts powerful and light with low deformations. Compared to guyed constructions requires a mast according to the invention a smaller space. The load capacities in the strength range and in the stability area can be continuously increased.
  • differential forces can be applied by means of a controlled or controlled adaptation. Due to the applied length changes are forced forces in the Boom part introduced, which counteract the physical effects. The thus statically indefinite system is able to relocate a concentration of stress. The different loads are distributed almost uniformly on the cross section, local peak stresses are avoided.
  • the force component from the guy ropes in the boom longitudinal axis is previously attributed to several boom parts.
  • the individual fasteners are additionally loaded and must be sized larger (Verbolzungsechen, cylinders, ropes, etc.). Due to the inventive bias of the individual jib parts, the low-acting biasing force is short-circuited, the connecting elements are not charged in addition and can be designed more economical.
  • piezoelectric sensors As a signal generator, inter alia, fiber optic sensors or piezoelectric sensors can be used. Piezoelectric composites would be able to detect damage to the component.
  • Actuators generate the variable tensile forces in the elements.
  • hydraulic cylinders pneumatic cylinders, spindles, springs or piezoceramic actuators can be used.
  • the individual boom parts are adapted separately to changing stresses by a force acts on the respective biasing elements or they are excited to a change in length.
  • the system of shell, traction elements with sensors and / or actuators and cladding layer recognizes and regulates the degree of utilization and distributes the load harmoniously over the cross section.
  • the load capacity and the usability are increased.
  • the dead weight is reduced, thus increasing the stability values. Deformation and vibrations are greatly reduced, the fatigue strength increases and a pendulum load is reduced or prevented.
  • the cross section of the forming shell can be designed so that it is suitable to absorb compressive stresses at low material thickness.
  • a Shaping with outwardly curved shells without sharp-edged transitions is to be preferred.
  • Preferred materials for the production of the forming shell include fine grain steel, aluminum or fiber composites.
  • tension elements preferably rods, wires or slats can be used.
  • the distribution over the cross section is arbitrary.
  • the tension elements are distributed over the entire surface or partially over the cross section.
  • they are arranged between the plain bearings to use anisotropic materials that have low strengths transverse to the fiber longitudinal direction.
  • the orientation of the tension elements may extend in the cantilever direction or obliquely thereto.
  • a combination of oblique and longitudinal tension members counteracts the bending and torsional loading of the boom.
  • anisotropic materials are arranged on the sliding bearing surfaces, it must be ensured that the sliding and cladding layers distribute the high concentrated transverse forces from the bearings accordingly.
  • Suitable materials include carbon fibers, natural fibers, high strength steel wires or highly modular plastic fibers.
  • the cross-sectional shape of the tension elements is arbitrary.
  • the anchoring and the force application of the tension elements are located in or on the end frame of the jib part.
  • the tension elements are distributed in hollow profiles, channels or in an elastic matrix over the shaping shell. If the traction elements with the forming shell and / or the sheath form a shear-resistant unit, they must be prestressed before the connection. If the tension elements lie without connecting means between the shaping shell and the transverse winding, they are clamped by the bending deformation and form a positive connection with the shell and the transverse winding.
  • tension elements are in hollow profiles, they are preferably connected to the shaping shell in a shear-resistant manner and are supporting elements of the cross section.
  • the combination of the shell, the hollow sections and the envelope results in the advantageous stability-promoting sandwich construction.
  • the traction units according to the invention can also have a positive influence on the bearing behavior, fatigue strength and serviceability.
  • the tension elements are advantageously protected against damage and environmental influences.
  • the circumferential winding keeps the traction elements running in the longitudinal axis in their position and prevents detachment from the shaping shell. Preference is given to materials which can absorb high compressive forces transversely to their longitudinal axis (glass fiber, natural fiber, highly modular synthetic fibers, etc.).
  • the circumferential material layer absorbs lateral forces, and the stiffening effect increases the buckling resistance and reduces the risk of breakdown in shell constructions.
  • the circumferential fiber composite layer in conjunction with the abrasion-resistant and lubricious outer layer, protects the tension elements.
  • reference numeral 10 generally refers to the boom or boom cross-section.
  • reference numeral 11 biased tension elements are referred to, which are located within hollow sections 12.
  • the reference numeral 13 points to a layer of transverse fibers, while with 14 is a protective layer.
  • the inner shell 15 is a shaping shell, and the lamellae or lamella elements arranged in the transition region between the upper shell and the vertical section have been provided with the reference numeral 16.
  • the arrangement of the anchorages, in which the sensors and / or actuators are housed, are identified by the reference numeral 17.

Landscapes

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

Claims (13)

  1. Partie de flèche (10) pour une grue, en particulier une grue mobile, comportant une coque de mise en forme (15), des éléments de traction (11) et un revêtement (13, 14), caractérisée en ce que les éléments de traction (11) sont préchargés et équipés de capteurs.
  2. Partie de flèche selon la revendication 1, caractérisée en ce que les éléments de traction (11) introduisent une précontrainte variable dans la partie de flèche au moyen d'actionneurs.
  3. Partie de flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que la partie de flèche contrecarre des effets extérieurs de manière adaptative au moyen de capteurs et d'actionneurs par l'intermédiaire d'une boucle de commande.
  4. Partie de flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que des ancrages (17) des éléments de traction (11) sont agencés dans ou sur le châssis d'extrémité.
  5. Partie de flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que les capteurs sont intégrés dans les éléments de traction.
  6. Partie de flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que les capteurs et/ou actionneurs se trouvent aux extrémités des éléments de traction (11).
  7. Partie de flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que les éléments de traction (11) sont enveloppés d'une couche de fibres (13) s'étendant transversalement à l'axe de la flèche.
  8. Partie de flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que les éléments de traction (11) s'étendent dans des canaux ou des profilés creux (12).
  9. Partie de flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que les éléments de traction (11) sont noyés dans une matrice élastique.
  10. Partie de flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que les éléments de traction (11) sont enroulés et serrés.
  11. Flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que les éléments de traction sont préchargés et reliés à la coque de mise en forme (15) et/ou à l'enveloppe ou au revêtement (13, 14) de manière à résister au cisaillement.
  12. Flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que la coque de mise en forme, le profilé creux muni des éléments de traction et/ou l'enveloppe sont reliés de manière à résister au cisaillement et forment un profilé stratifié.
  13. Flèche selon l'une quelconque des revendications précédentes, caractérisée en ce que les éléments de traction (11) s'étendent dans une direction longitudinale de l'axe de la flèche et/ou de biais par rapport à celui-ci.
EP11160100A 2010-05-10 2011-03-29 Flèche de grue, notamment flèche de grue mobile dotée d'éléments de traction prétendus Not-in-force EP2386517B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202010006624U DE202010006624U1 (de) 2010-05-10 2010-05-10 Kranausleger, insbesondere Mobilkranausleger, mit vorgespannten Zugelementen

Publications (2)

Publication Number Publication Date
EP2386517A1 EP2386517A1 (fr) 2011-11-16
EP2386517B1 true EP2386517B1 (fr) 2013-01-23

Family

ID=42539029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11160100A Not-in-force EP2386517B1 (fr) 2010-05-10 2011-03-29 Flèche de grue, notamment flèche de grue mobile dotée d'éléments de traction prétendus

Country Status (9)

Country Link
US (1) US8646629B2 (fr)
EP (1) EP2386517B1 (fr)
JP (1) JP5538300B2 (fr)
KR (1) KR20110124141A (fr)
CN (1) CN102241369B (fr)
BR (1) BRPI1102499A2 (fr)
CA (1) CA2736302C (fr)
DE (1) DE202010006624U1 (fr)
ES (1) ES2403704T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102733609B (zh) * 2012-06-26 2016-01-20 三一汽车制造有限公司 一种臂架、臂架系统和工程机械
US9630816B1 (en) 2013-03-11 2017-04-25 Oz Lifting Products, LLC Portable crane formed of composite members
ITMI20131680A1 (it) * 2013-10-11 2015-04-12 Cifa Spa Dispositivo ausiliario per una gru e gru comprendente tale dispositivo ausiliario
RU175228U1 (ru) * 2017-07-14 2017-11-28 Акционерное общество "Галичский автокрановый завод" Стрела подъёмного крана
WO2022011783A1 (fr) 2020-07-14 2022-01-20 三一汽车制造有限公司 Flèche, ensemble flèche et engin de chantier
CN111719865A (zh) * 2020-07-14 2020-09-29 三一汽车制造有限公司 臂架、臂架组件和作业机械

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Also Published As

Publication number Publication date
CA2736302C (fr) 2013-08-27
DE202010006624U1 (de) 2010-08-05
EP2386517A1 (fr) 2011-11-16
CA2736302A1 (fr) 2011-11-10
ES2403704T3 (es) 2013-05-21
CN102241369B (zh) 2014-12-03
US20110272378A1 (en) 2011-11-10
BRPI1102499A2 (pt) 2012-10-16
JP2011236055A (ja) 2011-11-24
KR20110124141A (ko) 2011-11-16
JP5538300B2 (ja) 2014-07-02
US8646629B2 (en) 2014-02-11
CN102241369A (zh) 2011-11-16

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