EP2371756B1 - Appui de chute en arrière - Google Patents

Appui de chute en arrière Download PDF

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Publication number
EP2371756B1
EP2371756B1 EP11002368.6A EP11002368A EP2371756B1 EP 2371756 B1 EP2371756 B1 EP 2371756B1 EP 11002368 A EP11002368 A EP 11002368A EP 2371756 B1 EP2371756 B1 EP 2371756B1
Authority
EP
European Patent Office
Prior art keywords
fall
carbon fiber
accordance
back support
pressure rod
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
EP11002368.6A
Other languages
German (de)
English (en)
Other versions
EP2371756A3 (fr
EP2371756A2 (fr
Inventor
Holger Dipl.-Ing Streitz
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 Nenzing GmbH
Original Assignee
Liebherr Werk Nenzing 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
Application filed by Liebherr Werk Nenzing GmbH filed Critical Liebherr Werk Nenzing GmbH
Publication of EP2371756A2 publication Critical patent/EP2371756A2/fr
Publication of EP2371756A3 publication Critical patent/EP2371756A3/fr
Application granted granted Critical
Publication of EP2371756B1 publication Critical patent/EP2371756B1/fr
Active 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
    • B66C23/82—Luffing gear
    • 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
    • B66C23/66—Outer or upper end constructions
    • 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
    • B66C23/702—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic with a jib extension boom
    • 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
    • B66C23/88—Safety gear
    • B66C23/92—Snubbers or dashpots for preventing backwards swinging of jibs, e.g. in the event of cable or tackle breakage

Definitions

  • Object of the present invention is therefore to provide a fallback support available, through which higher payloads can be achieved, in particular by reducing the weight of the push rod.
  • a fallback support according to claim 1.
  • This is a fall arrest support for a jib attached to a jib head of a crane with at least one push rod disposed between the jib and the jib head and limiting a relieving movement of the jib.
  • the push rod comprises a fiber composite tube. The use of such a fiber composite tube as a push rod allows a significant weight reduction at the same compressive strength of the fallback support. As a result, the load of the boom can be increased accordingly or can be used a correspondingly larger and longer boom.
  • the push rod comprises an aluminum tube with a reinforcement made of carbon fibers.
  • a reinforcement made of carbon fibers The use of such an aluminum-carbon fiber composite as a push rod leads on the one hand to a high-strength yet lightweight push rod.
  • the use of an aluminum tube allows easy connection of the push rod to the rest of the construction, eg. B. over tails, which are easily connected to the aluminum tube.
  • the case of fiber reinforced Plastic pipes often problematic connection to the further construction is therefore considerably simplified.
  • the carbon fiber blades surround the aluminum tube in the circumferential direction with intervals between them.
  • weight can be saved because no continuous, running in the longitudinal direction of the aluminum tube carbon fiber reinforcement is used, but the carbon fiber slats each have a certain distance between each other.
  • carbon fiber slats also facilitates the production of the push rod according to the invention, since these can be manufactured separately and then connected to the aluminum rod.
  • the carbon fiber fins have a thickness in the radial direction, which is between 50% and 300% of the wall thickness of the aluminum tube be advantageously between 80% and 250%, more advantageously between 100% and 200%.
  • more than three carbon fiber fins are provided, further advantageously more than five carbon fiber fins. Further advantageously, the number of carbon fiber fins is between three and twenty, more advantageously between five and twelve.
  • the push rod may have a wrapping of carbon fibers in the circumferential direction at least in a partial region. Such a winding of carbon fibers allows a particularly effective damping of the push rod.
  • the thickness of the coiling of carbon fibers in the radial direction is less than 70% of the wall thickness of the aluminum tube and / or the thickness of the carbon fiber fins, more advantageously less than 50%, more advantageously less than 30%.
  • the thickness of the wrapping is more than 5% of the wall thickness of the aluminum tube, moreover advantageously more than 10%.
  • no carbon fiber wrap is provided in the end regions of the aluminum tube.
  • the carbon fiber fins are arranged on the winding of carbon fibers.
  • the push rod thus has the following structure from inside to outside: an aluminum tube, one of the wrapping Carbon fiber layer formed in the circumferential direction and arranged on this wrapping carbon fiber fins.
  • an aluminum-carbon fiber composite tube allows a particularly simple connection of the push rod via end pieces, which are connected to the aluminum tube.
  • the push rod is carried out as already described above.
  • the push rod has several, in the longitudinal direction the push rod extending carbon fiber fins on.
  • the carbon fiber slats are designed as shown above.
  • the push rod on a winding of carbon fibers in the circumferential direction is carried out as already described above.
  • the present invention further includes a crane having a fall-back support and / or a push rod and / or grid construction as set forth above.
  • the fallback support in FIG. 1 furthermore two hydraulic cylinders 6 coupled via gas springs, which are arranged between the boom head 3 and the guy support 5.
  • the entire retreating moment of the guy blocks 5 is thus compensated via the gas springs 6.
  • the retreating moment of the jib is absorbed by the pressure rods according to the invention, which form rigid pressure rods.
  • FIG. 5 the direction of the compressive force F is shown by the arrows, which acts on the push rod according to the invention.
  • the push rod according to the invention is designed in the exemplary embodiment so that it withstands a pressure load of more than 500 kN.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (10)

  1. Appui de recul pour une flèche à aiguille qui est apposée sur une tête de flèche d'une grue, avec au moins une barre de compression, qui est disposée entre la flèche à aiguille et la tête de flèche et limite un mouvement de recul de la flèche à aiguille,
    caractérisé en ce que
    au moins la barre de compression comporte un tube renforcé par des fibres, notamment un tube d'aluminium avec un renfort en fibres de carbone.
  2. Appui de recul selon la revendication 1, la barre de compression comprenant plusieurs lamelles en fibres de carbones se projetant dans le sens longitudinal de la barre de compression.
  3. Appui de recul selon la revendication 2, les lamelles en fibres de carbones entourant le tube en aluminium dans le sens de la circonférence avec des intervalles se trouvant entre elles.
  4. Appui de recul selon une quelconque des revendications 2 ou 3, les lamelles en fibres de carbones étant disposées dans une zone centrale de la barre de compression et ne s'étendant pas dans les zones terminales de la barre de compression.
  5. Appui de recul selon une quelconque des revendications précédentes, la barre de compression présentant au moins dans une zone partielle un enroulement en fibres de carbone dans le sens de la circonférence.
  6. Appui de recul selon la revendication 5, l'enroulement en fibres de carbone s'étendant au-dessus de la zone des lamelles en fibres de carbone et/ou les lamelles en fibres de carbone étant disposées sur l'enroulement en fibres de carbone.
  7. Appui de recul selon une quelconque des revendications précédentes, avec au moins une première extrémité, qui permet un boulonnage de l'appui de recul et/ou avec une deuxième extrémité, qui en cas de sollicitation s'engrène mécaniquement dans un logement terminal sur la flèche à aiguille ou sur la tête de flèche.
  8. Barre de compression en un tube d'aluminium avec un renfort en fibres de carbone selon une quelconque des revendications 2 à 6 comme partie d'un appui de recul selon une quelconque des revendications précédentes.
  9. Construction grillagée, notamment flèche, avec un appui de recul et/ou une barre de compression selon une quelconque des revendications précédentes.
  10. Grue comportant un appui de recul selon une quelconque des revendications 1 à 7 et/ou une barre de compression selon la revendication 8 et/ou une construction grillagée selon la revendication 9.
EP11002368.6A 2010-03-30 2011-03-22 Appui de chute en arrière Active EP2371756B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010013328A DE102010013328A1 (de) 2010-03-30 2010-03-30 Rückfallstütze

Publications (3)

Publication Number Publication Date
EP2371756A2 EP2371756A2 (fr) 2011-10-05
EP2371756A3 EP2371756A3 (fr) 2011-12-21
EP2371756B1 true EP2371756B1 (fr) 2013-05-08

Family

ID=44202139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11002368.6A Active EP2371756B1 (fr) 2010-03-30 2011-03-22 Appui de chute en arrière

Country Status (3)

Country Link
US (1) US20110240582A1 (fr)
EP (1) EP2371756B1 (fr)
DE (1) DE102010013328A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102745604B (zh) * 2012-06-21 2014-09-10 三一重工股份有限公司 履带式起重机
DE202016005619U1 (de) * 2016-09-12 2016-12-19 Liebherr-Werk Ehingen Gmbh Kran
DE202017104032U1 (de) * 2017-05-31 2018-09-18 Liebherr-Werk Biberach Gmbh Tragwerk für einen Kran und ähnliche Arbeitsmaschinen, sowie Kran mit einem solchen Tragwerk
JP7276300B2 (ja) * 2020-10-22 2023-05-18 コベルコ建機株式会社 ジブバックストップ装置、およびジブバックストップ装置の輸送方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2634081A1 (de) * 1976-07-29 1978-02-02 Klaus Lechleitner Kranausleger in verbundbauweise
US4473214A (en) * 1980-12-24 1984-09-25 Kidde, Inc. Luffing jib for construction crane
US4782962A (en) * 1982-02-16 1988-11-08 Hackworth Harry L Back packable portable unit
DE4408444C1 (de) * 1994-03-12 1995-04-06 Dornier Gmbh Rohr oder Hohlprofil mit besonderen Festigkeitseigenschaften bei geringem Gewicht und Verfahren zu seiner Herstellung
DE19829829A1 (de) * 1998-07-03 2000-01-13 Grove Us Llc Shady Grove Verbundwerkstoff-Teleskopteil und -ausleger
US6267200B1 (en) * 1998-11-02 2001-07-31 Grove U.S. Llc Lift apparatus with floating lift cylinder attachment
JP4553454B2 (ja) * 2000-07-28 2010-09-29 株式会社アイチコーポレーション 高所作業車のブーム構造
US6719009B1 (en) * 2001-02-23 2004-04-13 Schwing America, Inc. Composite material piping system
ITUD20070056A1 (it) * 2007-03-16 2008-09-17 Cifa Spa Braccio di distribuzione di calcestruzzo per veicoli da lavoro e relativo procedimento di fabbricazione
US8505184B2 (en) * 2009-03-13 2013-08-13 Cifa Spa Method to make an arm for the distribution of concrete, and arm thus made
US8910807B2 (en) * 2009-05-20 2014-12-16 Manitowoc Crane Companies, Llc Compressible stop member for use on a crane

Also Published As

Publication number Publication date
EP2371756A3 (fr) 2011-12-21
DE102010013328A1 (de) 2011-10-06
US20110240582A1 (en) 2011-10-06
EP2371756A2 (fr) 2011-10-05

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