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EP0460476A1 - Flèche télescopique avec mécanisme d'extension - Google Patents

Flèche télescopique avec mécanisme d'extension Download PDF

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Publication number
EP0460476A1
EP0460476A1 EP91108506A EP91108506A EP0460476A1 EP 0460476 A1 EP0460476 A1 EP 0460476A1 EP 91108506 A EP91108506 A EP 91108506A EP 91108506 A EP91108506 A EP 91108506A EP 0460476 A1 EP0460476 A1 EP 0460476A1
Authority
EP
European Patent Office
Prior art keywords
boom
telescopic
push
parts
base body
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.)
Granted
Application number
EP91108506A
Other languages
German (de)
English (en)
Other versions
EP0460476B1 (fr
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.)
EC Engineering and Consulting Spezialmaschinen GmbH
Original Assignee
EC Engineering and Consulting Spezialmaschinen GmbH
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 EC Engineering and Consulting Spezialmaschinen GmbH, Krupp Industietechnik GmbH filed Critical EC Engineering and Consulting Spezialmaschinen GmbH
Publication of EP0460476A1 publication Critical patent/EP0460476A1/fr
Application granted granted Critical
Publication of EP0460476B1 publication Critical patent/EP0460476B1/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

Definitions

  • the invention relates to a telescopic boom, consisting of a base body and a plurality of telescopic boom parts and a push-out arrangement, wherein two adjacent boom parts can be locked together.
  • a push-out arrangement with several stages can - as can be seen from DE-AS 21 03 570 - have or consist of several single-stage hydraulic cylinders.
  • the invention is based on the object of designing a telescopic crane boom of the type mentioned in such a way that a further telescopic boom part can be handled with known crane booms with a given push-out arrangement or, conversely, that the permissible for a crane boom with a given number of boom parts Load can be increased at least for partial lengths of the boom.
  • the push-out arrangement can be coupled axially to the base body by a coupling device at two axially different locations, the spacing of which essentially corresponds to the stroke length of a telescopic boom part.
  • the measure according to the invention relates analogously to the push-out device which is located within the base body.
  • the push-out arrangement is initially coupled to the base body in the end facing away from the head part or the cable pulley arrangement, it is possible with the measure according to the invention to push out all telescopic boom parts together, these being interlocked in a known manner.
  • the coupling between the push-out arrangement and the base body can be released and the push-out arrangement can be moved back to its original length. Since the push-out arrangement is articulated in the head part of the boom, this means that the articulation or coupling point of the push-out arrangement is pulled within the base body by a stroke length in the direction of the cable pulley arrangement or the head part. In this second position, the push-out arrangement is newly coupled to the base body, and with each stroke of the push-out arrangement, the boom can be extended or extended by a partial length in a known manner.
  • boom parts can be handled with at least partially larger permissible load values. If the push-out arrangement can also be coupled in the head part of the boom at two axially different locations, even (n + 2) telescopic boom parts or a boom with a total of (n + 3) boom parts (including base body) can be handled.
  • the push-out arrangement can be made simpler by one stroke or one step than known telescopic booms and can thus be produced with less effort. This also saves material and weight, which can be used to reinforce the load-bearing parts of the boom.
  • the push-out arrangement can be coupled at axially different locations both in the base body and in the head part of the boom, identical coupling devices can be used for coupling the parts mentioned, only differing in the width due to the different cross-section of the boom parts.
  • the identical construction has a cost-effective effect both in procurement and in the provision of spare parts.
  • the boom 1 shown is part of a (not shown) mobile crane. It can be raised and lowered about a horizontal axis 2 and can be rotated or pivoted about a vertical axis, as disclosed, for example, in DE-OS 30 28 241 (FIG. 1).
  • the boom 1 has five box-shaped boom parts: the base body 3, which is articulated directly on the mobile crane in the horizontal axis 2, three further telescopic intermediate parts 4, 5, 6 and the telescopic head part 7 with the head 8, in which one or more rollers 9 for guidance of the rope 10 are arranged.
  • Each boom part 3 ... 7 can be locked to its adjacent boom part by a locking arrangement with two lateral locking devices 11.3 (on the base body 3), 11.4 (on the intermediate part 4), etc., as described, for example, in DE-PS 35 10 710 are disclosed.
  • 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 in the webs 12 of the boom parts 3, 7 centrally on both sides between the guide rails 15, 16, specifically in the base body 3 the recesses 17.3.1 in the region of the horizontal axis 2 and 17.3.2 in the area pointing away from the horizontal axis 2 and in the head part 7, the recesses 17.7.1 (in the area facing the base body 3) and (in the vicinity of the head 9) 17.7.2 (unless a specific recess is meant below) generally used the reference number 17).
  • a hydraulic cylinder 20 with a two-stage piston rod 21, 21a is located within the boom parts 3 ... 7.
  • a coupling device 22.3 or 22.7 is attached to both the base of the actual hydraulic cylinder 20 and the free end of the piston rod 21a.
  • These coupling devices (also referred to in the following only briefly with 22) have outward-pointing securing or coupling bolts 27 which engage in the coupling position in the recesses 17 in the webs 12 of the boom part 3 or 7.
  • a gaseous or liquid pressure medium can be used, which reaches the coupling device through a connection 34.
  • the coupling bolts 27 are moved in the direction of the vertical longitudinal center plane 35 of the boom parts 3, 7 or the entire boom 1 and withdrawn from the recesses 17 of the webs 12: the hydraulic cylinder 20 or the piston rod 21a are from the boom section 3 or 7 uncoupled.
  • the coupling devices 22.3 and 22.7 are slidably guided between the guide rails 15, 16.
  • the coupling devices 22.3 and 22.7 have the same structure with one another. They differ, due to the size of the assigned boom parts 3 and 7, only in their width or their axial extent.
  • the hydraulic cylinder 20 and the coupling devices 22.3 or 22.7 can be supplied with pressure medium via flexible lines (not shown) from a hose or cable drum or via an energy chain 37 known per se.
  • the boom or telescopic parts 4 to 7 are pushed out together on the base body 3 when the locking arrangement 11.3 is unlocked and the locking arrangement 11.3 is then locked again.
  • the locking arrangement 11.4 is unlocked and the telescopic parts 5 to 7 are extended together by further extending the piston rod 21a in a second stage.
  • the coupling bolts 27 of the coupling device 22.3 are withdrawn from the recesses 17.3.1 of the basic boom 3, so that the hydraulic cylinder 20 is uncoupled from the basic body 3.
  • the piston rod 21a is retracted. Since the piston rod 21a is coupled to the head part 7, this means that the cylinder 20 - with the uncoupled coupling device 22.3 - is pulled towards the head part 7 with a given relative movement to the piston rods 21, 21a.
  • the coupling device 22.3 slides at the foot of the Cylinder 20 in the guide rails 15, 16 of the base body 3 in the direction of the head part in the position shown in Fig. 2.
  • the coupling bolts 27 are pressed into the recesses 17.3.2 in the new position in the area of the base body 3 facing away from the axis 2 by the springs 30.
  • the base body 3 and the head part 7 can of course have further recesses at predetermined intervals between the recesses 17.3.1 and 17.3.2 or 17.7.1 and 17.7.2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP91108506A 1990-06-07 1991-05-25 Flèche télescopique avec mécanisme d'extension Expired - Lifetime EP0460476B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4018201 1990-06-07
DE4018201A DE4018201A1 (de) 1990-06-07 1990-06-07 Teleskopausleger mit ausschiebeanordnung

Publications (2)

Publication Number Publication Date
EP0460476A1 true EP0460476A1 (fr) 1991-12-11
EP0460476B1 EP0460476B1 (fr) 1997-01-08

Family

ID=6407931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108506A Expired - Lifetime EP0460476B1 (fr) 1990-06-07 1991-05-25 Flèche télescopique avec mécanisme d'extension

Country Status (2)

Country Link
EP (1) EP0460476B1 (fr)
DE (2) DE4018201A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925188C2 (de) * 1999-05-26 2003-03-13 Demag Mobile Cranes Gmbh & Co Verfahren zum synchronen Ein- und Austeleskopieren von Teleskopschüssen eines Kranauslegers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1944463A1 (de) * 1969-09-02 1971-03-04 Krupp Gmbh Mehrfacher Teleskopausleger,insbesondere fuer einen Autokran
DE2029612A1 (de) * 1969-06-18 1971-03-04 Podpolianske Strojarne Narodny Teleskopischer Ausleger fur einen Bagger, Kran oder eine ähnliche Einrichtung
DE2626511A1 (de) * 1976-06-12 1977-12-22 Krupp Gmbh Teleskopier-antriebseinrichtung eines teleskopauslegers
DE2757040A1 (de) * 1977-12-21 1979-07-05 Hans Scheuerpflug Teleskop-anordnung
US4514939A (en) * 1981-08-17 1985-05-07 Fmc Corporation Extensible boom with manual section stored in base

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510710A1 (de) * 1985-03-23 1986-10-02 Fried. Krupp Gmbh, 4300 Essen Teleskopkran

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029612A1 (de) * 1969-06-18 1971-03-04 Podpolianske Strojarne Narodny Teleskopischer Ausleger fur einen Bagger, Kran oder eine ähnliche Einrichtung
DE1944463A1 (de) * 1969-09-02 1971-03-04 Krupp Gmbh Mehrfacher Teleskopausleger,insbesondere fuer einen Autokran
DE2626511A1 (de) * 1976-06-12 1977-12-22 Krupp Gmbh Teleskopier-antriebseinrichtung eines teleskopauslegers
DE2757040A1 (de) * 1977-12-21 1979-07-05 Hans Scheuerpflug Teleskop-anordnung
US4514939A (en) * 1981-08-17 1985-05-07 Fmc Corporation Extensible boom with manual section stored in base

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED SECTION Q , WEEK 8949 , 24 JAN. 1990 DERWENT PUBLICATIONS LDT . , LONDON G. B. KLASSE Q , SEITE 38 , NR . 89 - 362605 / 49 & SU - A - 1461 - 750 ( ASSEMBLY CONS DES ) 29 FEB . 1989 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925188C2 (de) * 1999-05-26 2003-03-13 Demag Mobile Cranes Gmbh & Co Verfahren zum synchronen Ein- und Austeleskopieren von Teleskopschüssen eines Kranauslegers

Also Published As

Publication number Publication date
DE4018201A1 (de) 1992-01-02
DE59108460D1 (de) 1997-02-20
EP0460476B1 (fr) 1997-01-08

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