EP0460475A1 - Flèche télescopique avec dispositif d'accouplement pour mécanisme d'extension - Google Patents

Flèche télescopique avec dispositif d'accouplement pour mécanisme d'extension Download PDF

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Publication number
EP0460475A1
EP0460475A1 EP91108505A EP91108505A EP0460475A1 EP 0460475 A1 EP0460475 A1 EP 0460475A1 EP 91108505 A EP91108505 A EP 91108505A EP 91108505 A EP91108505 A EP 91108505A EP 0460475 A1 EP0460475 A1 EP 0460475A1
Authority
EP
European Patent Office
Prior art keywords
boom
coupling device
coupling
coupled
webs
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.)
Withdrawn
Application number
EP91108505A
Other languages
German (de)
English (en)
Inventor
Peter Dipl.-Ing. Barsuhn
Ernst Kaspar
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.)
Krupp Industietechnik GmbH
Original Assignee
Krupp Industietechnik 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 Krupp Industietechnik GmbH filed Critical Krupp Industietechnik GmbH
Publication of EP0460475A1 publication Critical patent/EP0460475A1/fr
Withdrawn legal-status Critical Current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 with the following features:
  • the boom consists of a base body and several telescopic boom parts as well as an extension arrangement.
  • the boom parts have a box-shaped cross-section with side webs.
  • the push-out arrangement can be coupled to a cantilever part by a coupling device at at least two axially different locations.
  • Such a boom is such. B. from DE-PS 12 17 041 known.
  • the push-out arrangement is designed as a hydraulic cylinder, the cylinder body of which is fastened to the base body or base boom.
  • a guide carriage is provided for guiding the piston rod, in which there is a coupling device with a lifting and lowering coupling bolt which can engage in corresponding recesses in the lower flange of the head piece of the boom.
  • a disadvantage of the known boom is that the guide carriage is a complex construction. Furthermore, the coupling point in the lower flange of the head part results in an eccentric load in relation to the neutral plane of the head part or the entire boom, which can lead to canting when pushing the head piece in and out.
  • a telescopic boom in which the push-out arrangement also consists of a hydraulic cylinder, but the piston rod has a symmetrically shaped head with two outwardly facing recesses.
  • the coupling of the head of the piston rod to the head part of the telescopic boom takes place when the head part is pushed out from the middle telescope part and the piston rod is retracted by two double locking devices which are arranged symmetrically opposite one another on the middle telescope part adjoining the head part.
  • the double locking devices do not allow the head of the push-out arrangement to be coupled to the head part of the telescopic boom independently of the central telescopic part.
  • the invention has for its object to design a telescopic boom of the type mentioned so that it turns out simpler and easier overall while avoiding the disadvantages mentioned.
  • the coupling device is attached directly to the push-out arrangement and is slidably guided in guide rails which are arranged on the inner surface of the webs of the boom part to be coupled with the push-out arrangement, that the coupling device has active coupling elements pointing symmetrically to the sides and that the boom part to be coupled has recesses in its webs for receiving or stops for engaging the active coupling elements.
  • the structurally and cost-intensive guide carriage can be dispensed with. It is sufficient to use small guide elements, e.g. B. plastic sliding plate to provide on the coupling device.
  • the guide rails do not represent any additional material expenditure and therefore do not cause a higher overall weight, since the cantilever part to be coupled is usually provided with buckling stiffeners anyway, which are essentially U-shaped and firmly attached to their legs, to improve the buckling stiffness of the webs are connected to the web and run parallel to the main boom axis. It is therefore only necessary to design the buckling stiffeners so that they have guide surfaces. Due to the symmetrical design of the coupling device, no eccentric forces occur, at least in the lateral direction, so that a safe, faultless extension and insertion of the boom part to be coupled is ensured.
  • the active coupling elements In order to safely guide or hold the active coupling elements in the position to be coupled even in the event of an unintentional failure of energy, they are preferably acted upon by an energy or spring accumulator.
  • the spring accumulator can be formed by a mechanical spring or a pressurized gaseous and / or liquid medium and the coupling elements can be moved from the stops or out of the recesses for decoupling by a gaseous and / or liquid pressure medium.
  • the coupling device is preferably releasably connected to the push-out arrangement in order to facilitate assembly, even in the event of repairs.
  • limiting pieces are also provided on the telescopic part, which also simultaneously transmit power between the push-out arrangement and the Telescope part can serve.
  • the boom 1 shown is part of a (not shown) mobile crane. He is one horizontal axis 2 can be raised and lowered and can be rotated or pivoted about a vertical axis, as disclosed, for example, in DE-OS 30 28 241 (FIG. 1).
  • the jib 1 has three box-shaped jib parts: the base body 3, which is articulated directly on the vehicle crane in the horizontal axis 2, the telescopic intermediate part 4 and the telescopic head part 5 with the head 6, in which one or more rollers 7 for guiding the cable 8 are arranged .
  • Each boom part 3 ... 5 can be locked to the boom part adjacent to it by a locking arrangement on the reinforced edge 3a, 4a of the respectively larger boom part 3 or 4.
  • Each locking arrangement consists of two laterally arranged locking devices 9 (9.3 on the base body 3 and 9.4 on the intermediate part 4), each with a locking bolt 10, which can engage in corresponding recesses 11 in the webs 12 of the intermediate part 4 or the head part 5.
  • an upper and a lower guide rail 15, 16 are arranged parallel to the main axis 13 of the boom 1.
  • recesses 17 are provided on both sides in the center between the guide rails 15, 16, specifically the recesses 17.1 in the area facing the base body 3 and 17.2 in the vicinity of the head 9 (unless a specific recess below what is meant is generally the reference number 17).
  • a coupling device 22 is arranged at the free end of the piston rod 21.
  • This coupling device has a housing 23, within which there are two cylinder spaces 24, in each of which a piston 26 is slidably guided. Securing or coupling bolts 27 pointing outward are connected to the piston 26 and are guided through corresponding passages 28 in the end wall 29 of the housing 23.
  • the pistons 26 - and with them the coupling bolts 27 - are each pressed outwards by a compression spring 30. In this position, the coupling bolts 27 engage in one of the recesses 17 in the webs 12 of the head part 5.
  • Reinforcing plates 31 can be arranged around the recesses 17.
  • the cylinder space 32 between the pistons 26 and the respective end wall 29 of the housing 23 has a connection 34 and can be acted upon from the outside by a gaseous or liquid pressure medium.
  • the pistons 26 are moved against the force of the compression spring 30 in the direction of the vertical longitudinal center plane 35 of the head part 5 or the entire arm 1 and the securing bolts 27 are withdrawn from the recesses 17 of the webs 12: the piston rod 21 is from the Head section 5 uncoupled.
  • the housing 23 of the coupling device 22 is provided with slide plates 36 at the top and bottom and is slidably guided over the latter between the guide rails 15, 16.
  • limit pieces or stops 39.1 and 39.2 are provided on the webs 12 between the guide rails 15, 16 in the direction pointing away from each other. These limit pieces are used for the exact positioning of the housing 23 of the coupling device 22 for coupling with the head part 5. If the housing 23 abuts against the limit piece 39.1 or 39.2 due to the force of the piston rod 21, the bolts 27 can be inserted correctly into the recesses 17.1 or 17.2 guaranteed. At the same time, the limit pieces 39.1, 39.2 can be used for the axial force transmission between the piston rod 21 and the head piece 5.
  • the head part 5 is pushed out on the intermediate part 4 when the locking device 9.4 is unlocked and the locking device 9.4 is then locked again.
  • the coupling bolts 27 of the coupling device 22 are withdrawn from the recesses 17.2 of the head part and the piston rod 21 is retracted in the idle stroke.
  • the coupling device 22 slides in the guide rails 15, 16 of the head part 5 to the recesses 17.1 until it abuts the limiting pieces 39.1.
  • the coupling bolts 27 are pressed by the springs 30 into the recesses 17.1 at the inner end of the head part 5 and the piston rod 21 is thus coupled again to the head part 5 at another point.
  • the head part 5 can of course have further recesses at predetermined intervals between the recesses 17.1 and 17.
  • the disclosed coupling device 22 is not limited to the coupling of the piston rod 21 to the head part 5. Rather, the push-out arrangement 20, 21 can also be designed with its other end to be coupled to the base body 3 with the aid of a coupling device 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP91108505A 1990-06-07 1991-05-25 Flèche télescopique avec dispositif d'accouplement pour mécanisme d'extension Withdrawn EP0460475A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4018222 1990-06-07
DE19904018222 DE4018222A1 (de) 1990-06-07 1990-06-07 Teleskopausleger mit kupplungsvorrichtung fuer ausschiebeanordnung

Publications (1)

Publication Number Publication Date
EP0460475A1 true EP0460475A1 (fr) 1991-12-11

Family

ID=6407946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108505A Withdrawn EP0460475A1 (fr) 1990-06-07 1991-05-25 Flèche télescopique avec dispositif d'accouplement pour mécanisme d'extension

Country Status (2)

Country Link
EP (1) EP0460475A1 (fr)
DE (1) DE4018222A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583552A1 (fr) * 1992-08-14 1994-02-23 LIEBHERR-WERK EHINGEN GmbH Flêche télescopique pour grues mobiles ou analogues
DE202006019308U1 (de) * 2006-12-21 2008-04-30 Liebherr-Werk Ehingen Gmbh Teleskopschuß
DE202007002203U1 (de) * 2007-02-14 2008-06-26 Liebherr-Werk Ehingen Gmbh Teleskopschuß
CN112173994A (zh) * 2020-09-18 2021-01-05 中联重科股份有限公司 控制阀单元、液压控制回路及具有伸缩式起重臂的工程设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29613131U1 (de) * 1996-08-01 1997-09-04 Heinrich Oelschläger Metallwarenfabrik GmbH & Co, 27318 Hoya Verriegelungsbeschlag, insbesondere für höhenverstellbare Tische
DE19811813B4 (de) * 1998-03-18 2005-11-24 Grove U.S. LLC (n.d.Ges.d.Staates Delaware) Seitliche Auslegerverriegelung
DE10004838B4 (de) * 1999-02-10 2006-05-04 Terex-Demag Gmbh & Co. Kg Kran mit einem Teleskopausleger
DE102009009944B4 (de) * 2009-02-20 2011-02-24 Terex-Demag Gmbh Sicherungs- und Verbolzungseinheit

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1217041B (de) * 1964-10-01 1966-05-18 Demag Zug Gmbh Teleskopausleger mit einem innerhalb des Auslegers angeordneten Kraftgeraet
DE1276305B (de) * 1967-05-03 1968-08-29 Orenstein & Koppel Ag Teleskopausleger fuer Kranbetrieb, insbesondere bei Erdbaggern
GB1152143A (en) * 1966-10-17 1969-05-14 Sargent Engineering Corp Telescopic Boom for a Crane or the like
DE2029612A1 (de) * 1969-06-18 1971-03-04 Podpolianske Strojarne Narodny Teleskopischer Ausleger fur einen Bagger, Kran oder eine ähnliche Einrichtung
DE3146311A1 (de) * 1980-11-24 1982-06-16 Harnischfeger Corp., 53246 West Milwaukee, Wis. Teleskopausleger fuer einen kran sowie verfahren zum teleskopieren des auslegers
FR2523565A1 (fr) * 1982-03-19 1983-09-23 Ppm Sa Fleche telescopique munie d'une allonge
US4688690A (en) * 1986-03-07 1987-08-25 Harnischfeger Corporation Method and apparatus for extending fly section of crane boom
DE3510710C2 (fr) * 1985-03-23 1988-10-20 Fried. Krupp Gmbh, 4300 Essen, De

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT56640B (de) * 1911-03-11 1912-12-10 Fontana Maste Und Traeger Ges Auskurbelbarer Teleskopmast.
US3171545A (en) * 1962-12-03 1965-03-02 Drott Mfg Corp Three section telescoping crane boom
DE1283023B (de) * 1966-04-23 1968-11-14 Demag Ag Steckbolzenverriegelung
US3462023A (en) * 1967-07-12 1969-08-19 Grove Mfg Co Reinforcement member for telescoping boom assembly
CH476625A (de) * 1967-12-22 1969-08-15 Warner Swasey Co Teleskopischer hydraulisch ausfahrbarer Ladebaum für einen Kran, und Verfahren zum Betrieb des Ladebaumes
US3842985A (en) * 1972-12-15 1974-10-22 Harnischfeger Corp Means for extending and retracting crane boom section
DE2318993A1 (de) * 1973-04-14 1974-10-24 Krone Bernhard Gmbh Maschf Teleskopierbarer ausleger oder druckstempel mit rueckholung
US4080080A (en) * 1977-02-16 1978-03-21 American Hospital Supply Corporation Adjustable leg assembly

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1217041B (de) * 1964-10-01 1966-05-18 Demag Zug Gmbh Teleskopausleger mit einem innerhalb des Auslegers angeordneten Kraftgeraet
GB1152143A (en) * 1966-10-17 1969-05-14 Sargent Engineering Corp Telescopic Boom for a Crane or the like
DE1276305B (de) * 1967-05-03 1968-08-29 Orenstein & Koppel Ag Teleskopausleger fuer Kranbetrieb, insbesondere bei Erdbaggern
DE2029612A1 (de) * 1969-06-18 1971-03-04 Podpolianske Strojarne Narodny Teleskopischer Ausleger fur einen Bagger, Kran oder eine ähnliche Einrichtung
DE3146311A1 (de) * 1980-11-24 1982-06-16 Harnischfeger Corp., 53246 West Milwaukee, Wis. Teleskopausleger fuer einen kran sowie verfahren zum teleskopieren des auslegers
FR2523565A1 (fr) * 1982-03-19 1983-09-23 Ppm Sa Fleche telescopique munie d'une allonge
DE3510710C2 (fr) * 1985-03-23 1988-10-20 Fried. Krupp Gmbh, 4300 Essen, De
US4688690A (en) * 1986-03-07 1987-08-25 Harnischfeger Corporation Method and apparatus for extending fly section of crane boom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583552A1 (fr) * 1992-08-14 1994-02-23 LIEBHERR-WERK EHINGEN GmbH Flêche télescopique pour grues mobiles ou analogues
DE202006019308U1 (de) * 2006-12-21 2008-04-30 Liebherr-Werk Ehingen Gmbh Teleskopschuß
DE202007002203U1 (de) * 2007-02-14 2008-06-26 Liebherr-Werk Ehingen Gmbh Teleskopschuß
CN112173994A (zh) * 2020-09-18 2021-01-05 中联重科股份有限公司 控制阀单元、液压控制回路及具有伸缩式起重臂的工程设备
CN112173994B (zh) * 2020-09-18 2021-11-05 中联重科股份有限公司 控制阀单元、液压控制回路及具有伸缩式起重臂的工程设备

Also Published As

Publication number Publication date
DE4018222A1 (de) 1991-12-12

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