EP0476225B1 - Teleskopiersystem mit verringerter Knicklänge des Teleskopierzylinders - Google Patents

Teleskopiersystem mit verringerter Knicklänge des Teleskopierzylinders Download PDF

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Publication number
EP0476225B1
EP0476225B1 EP91106245A EP91106245A EP0476225B1 EP 0476225 B1 EP0476225 B1 EP 0476225B1 EP 91106245 A EP91106245 A EP 91106245A EP 91106245 A EP91106245 A EP 91106245A EP 0476225 B1 EP0476225 B1 EP 0476225B1
Authority
EP
European Patent Office
Prior art keywords
take
cylinder
crane according
telescopic
marks
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.)
Revoked
Application number
EP91106245A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0476225A3 (en
EP0476225A2 (de
Inventor
Frank Deimann
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 Ehingen GmbH
Original Assignee
Liebherr Werk Ehingen 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
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Application filed by Liebherr Werk Ehingen GmbH filed Critical Liebherr Werk Ehingen GmbH
Publication of EP0476225A2 publication Critical patent/EP0476225A2/de
Publication of EP0476225A3 publication Critical patent/EP0476225A3/de
Application granted granted Critical
Publication of EP0476225B1 publication Critical patent/EP0476225B1/de
Anticipated expiration legal-status Critical
Revoked 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 mobile crane according to the preamble of claim 1.
  • a crane of this type known from DE-A 31 31 241 has a crane boom with an extension and retraction cylinder with a frame that surrounds it, which has toothed driving fingers in the area of the end of the cylinder from which the piston rod emerges, one between them Form groove-shaped recess.
  • the driver fingers are loaded by spring cartridges in the direction of their swung-out position and can be drawn in via pneumatic cylinders.
  • the driver fingers engage on the sides of window-like recesses which are provided at the rear ends of the telescopic shots.
  • This type of locking and unlocking the Driver device is relatively complicated and expensive.
  • the object of the invention is therefore to provide a simpler driver device for coupling and uncoupling to the shots to be telescoped.
  • the receptacles for the coupling pieces of the driver device are arranged at the inner ends of the telescopic shots. To extend and retract a telescopic shot, only this is always coupled to the driver device, so that the control of the bolts as a whole becomes easier and more manageable.
  • the receptacles for the coupling pieces of the driver device are expediently provided on annular frame parts at the inner ends of the telescopic sections. These recordings are expediently arranged in pairs opposite one another.
  • the receptacles are arranged in common planes parallel to the center line of the shots.
  • This configuration allows the coupling pieces of the driver device, which will generally be bolts, only have to be extended by the same amount to couple each of the shots, so that the driver device can be made more uncomplicated overall and the coupling pieces or Bolts for opposite shots can be closer together, so that the bolt and the entire driver device is less stressed because of the shorter lever arm lengths.
  • the block with opposing cylinders for the retractable and extendable driving bolts formed by their pistons can be connected to the cylinder as a collar-like end piece.
  • the receptacles are expediently located on both sides of the luffing plane of the telescopic boom.
  • the block with the driving pins or the telescopic cylinder in the area of the driving device are provided with support wheels for guiding the cylinder essentially in the center is.
  • the cylinder is expediently additionally provided with support wheels in its end region. Since this end area projects freely into the cavity of the telescopes, these support wheels prevent the cylinder from bumping or getting caught.
  • the cylinder in the area of the driver device is provided with sensors which scan marks in the area of the recordings of the telescopic shots for the correct control of the driver bolts in the receptacles.
  • the marks can be arranged in the direction of extension of the shots before the shots.
  • the marks expediently generate signals for reducing the entry speed and for extending the driver bolts into the receptacles. The marks thus reduce the speed when approaching the receptacles in the driver device of the cylinder for coupling the next shot to be fired, so that the receptacle bores are not overrun.
  • the marks expediently consist of reflection marks and the sensors are light-emitting and light-receiving elements which then generate the corresponding signals.
  • a telescopic boom 1 with an outer section 2 can be seen, from which telescoping sections 3, 4, 5, 6 can be extended.
  • a single-stage piston-cylinder unit 7 is provided for extending the individual telescopic sections 3-6.
  • the outer shot 2 is closed at its inner end by the boom link 8.
  • This boom link 8 has two forked bearing legs 9, 10 with aligned bearing bores 11, via which the outer shot is pivotally mounted in the usual manner on a pivot axis in the superstructure of a crane vehicle.
  • the piston rod of the rocker cylinder is articulated to the outer shot 2 in a manner not shown.
  • the piston rod 12 of the single-stage hydraulic piston-cylinder unit 7 is provided at its inner end with a head piece 13 which carries an extension 14 with a bearing eye 15.
  • the bearing eyelet 15 is mounted on a bearing pin which is held in bores in the forked bearing pieces 16, 17 which are connected to the base plate of the boom steering piece 8.
  • the cylinder 18 is provided at the outlet end of the piston rod 12 with a block 19 which surrounds it in an annular manner and which has cylinder bores on opposite sides, in which are guided as piston locking bolts 20, 21.
  • the telescopic sections 3-6 carry at their inner ends welded frame-shaped end pieces 22-25, which are provided on opposite sides symmetrically to the luffing plane of the telescopic boom with pot-shaped bushings 26, the receptacles for the locking bolts Form 20.21.
  • the center lines of the bores of the receptacles each have the same distances a from one another.
  • the outer shot 2 and the telescopic shots 3-5 are provided on opposite sides symmetrically to the seesaw plane each with spring-loaded locking bolts which can be moved out of the associated locking holes by pneumatic bolting cylinders 30-33 against spring force and can be locked in the locking holes by venting .
  • the ring-shaped locking block is provided with a guide carriage, which consists of two wheel sets 35, 36, which are arranged on the underside in relation to the seesaw plane, and an upper roller 37.
  • the outer end of the Cylinder 18 is provided with a guide carriage which carries an axle with two rollers 39 on its lower side and only one roller 40 on its upper side.
  • the pot-shaped bushings 26 with the receiving bores for the locking bolts 20, 21 are arranged in the manner shown in FIG. 2 in two planes which are parallel to the luffing plane of the telescopic boom.
  • Reflecting marks 41 which are illuminated by light-emitting elements, are arranged on the walls of the telescopes in each case in the direction of extension in front of the pot-shaped sockets 26, receptors being provided for the reflected light.
  • a scan is created by the light-emitting elements, reflectors and receptors, which reports a position of the driver block 19 to a central control unit when the cylinder 18 is extended and retracted, so that an exact and correct control the locking bolt 20, 21 is guaranteed in the receiving bores of the sockets 26.
  • proximity switches 45, 46 are arranged in the pot-shaped sockets 26 and report to the central control device that the bolts have properly engaged in the receiving bores.
  • the locking bolts 20, 21 are locked only if the sensing devices consisting of the light-emitting elements, reflectors and receptors have previously reported the correct latching position. If, due to a possibly incorrect control, the locking block 19 has run over the first images when approaching it, there is no locking at all, because the reflectors 41 of the following telescopic sections are covered.
  • the piston rod 12 is provided with a hydraulic oil bushing, which consists of two telescopic tubes, feed and discharge lines through the inner telescopic tube and through the annular space between the two telescopic tubes Tubes are formed.
  • FIG. 5-7 show how the individual telescopes 3-6 are each extended by 94% through the cylinder 18 in order to generate an extended state 94-94-94-94.
  • the extended state of 94% is to be regarded as more favorable, since there is a longer clamping length compared to the complete extension, which allows higher loads to be absorbed.
  • the locking bolts 20, 21 inserted into the corresponding receptacles 26 at the inner end of the inner telescope 6. Then the bolts of the inner telescope are released by means of a corresponding control via the pneumatic bolt cylinders, so that the telescope can be extended until the bolting is carried out again by venting the bolt cylinders in the 94% extended state.
  • the following telescopes are then extended one after the other, 18 sequential controls being provided for releasing the locks, making the locks and controlling the cylinder. The controls are carried out in such a way that the cylinder 18 is always retracted further by the distance a in order to extend a subsequent telescope.
  • the entire retracted telescopic package can only be extended by 50% in relation to the outer shot in the manner shown in order to achieve the desired telescopic lengths.
  • the telescopic boom of the telescopic system according to the invention can have any number of telescopic sections, the limits being set only by the spatial conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Actuator (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
EP91106245A 1990-09-18 1991-04-18 Teleskopiersystem mit verringerter Knicklänge des Teleskopierzylinders Revoked EP0476225B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9013210U 1990-09-18
DE9013210U DE9013210U1 (de) 1990-09-18 1990-09-18 Teleskopiersystem mit verringerter Knicklänge des Teleskopierzylinders

Publications (3)

Publication Number Publication Date
EP0476225A2 EP0476225A2 (de) 1992-03-25
EP0476225A3 EP0476225A3 (en) 1992-10-28
EP0476225B1 true EP0476225B1 (de) 1994-07-27

Family

ID=6857607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106245A Revoked EP0476225B1 (de) 1990-09-18 1991-04-18 Teleskopiersystem mit verringerter Knicklänge des Teleskopierzylinders

Country Status (3)

Country Link
EP (1) EP0476225B1 (zh)
AT (1) ATE109113T1 (zh)
DE (2) DE9013210U1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19926131B4 (de) * 1999-06-09 2007-04-19 Faun Gmbh Teleskop-Ausleger
US9085443B2 (en) 2009-01-27 2015-07-21 Manitowoc Crane Group France Sas Locking system for telescopic crane jib with movable locking unit
EP4357292A1 (en) 2022-10-21 2024-04-24 Oleodinamica Panni S.R.L. A blocking unit for telescopic systems, a hydraulic cylinder and a telescopic system

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59202474D1 (de) * 1991-02-11 1995-07-20 Liebherr Werk Ehingen Teleskopausleger für Fahrzeugkrane o.dgl.
DE9210902U1 (de) * 1992-08-14 1992-12-24 Liebherr-Werk Ehingen Gmbh, 7930 Ehingen Teleskopausleger für Fahrzeugkrane o.dgl.
DE4344795A1 (de) * 1993-12-28 1995-06-29 Liebherr Werk Ehingen Fahrbarer Kran mit einem Teleskopausleger
AT403041B (de) * 1994-02-25 1997-10-27 Zimmermann Horst Teleskopierstab
EP0754646B1 (de) * 1995-07-17 2000-05-10 Montanhydraulik GmbH Teleskopiersystem
DE19811813B4 (de) * 1998-03-18 2005-11-24 Grove U.S. LLC (n.d.Ges.d.Staates Delaware) Seitliche Auslegerverriegelung
FR2797862B1 (fr) * 1999-09-01 2001-11-16 Ppm Procede de telescopage d'une fleche de grue, dispositif pour sa mise en oeuvre et fleche de grue en faisant application
DE10022373B4 (de) 2000-05-08 2005-11-24 Grove U.S. Llc Verriegelungs- und Betätigungseinheit für seitliche Auslegerverriegelung
US6601719B2 (en) 2001-09-21 2003-08-05 Link-Belt Construction Equipment Co., L.P., Lllp Locking and latching system for a telescoping boom
DE102007052954B3 (de) * 2007-10-31 2009-07-09 Terex Demag Gmbh Kran mit Teleskopausleger
AT12942U1 (de) * 2011-11-08 2013-02-15 Palfinger Ag Kran, insbesondere ladekran für ein fahrzeug
CN103171983A (zh) * 2013-03-27 2013-06-26 长治清华机械厂 起重机吊臂三级同步伸缩机构
CN103527558B (zh) * 2013-10-09 2016-08-31 三一汽车制造有限公司 一种伸缩油缸支撑装置和工程机械
CN103613007B (zh) * 2013-12-18 2015-07-08 三一汽车起重机械有限公司 起重臂插销结构、起重臂和起重机
JP6467959B2 (ja) * 2015-02-04 2019-02-13 株式会社タダノ 伸縮ブームの伸縮装置
JP6787392B2 (ja) * 2016-03-03 2020-11-18 株式会社タダノ 伸縮機構
CN110902582B (zh) * 2019-12-04 2021-07-09 太原重工股份有限公司 伸缩臂及包括这种伸缩臂的起重机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274291B (de) * 1967-02-17 1968-08-01 Krupp Gmbh Mehrstufig teleskopierbarer Ausleger
DE2926292A1 (de) * 1979-06-29 1981-01-08 Harnischfeger Gmbh Insbesondere mobiler teleskopauslegerkran
US4327533A (en) * 1980-08-13 1982-05-04 Kidde, Inc. Crane boom extending, retracting and cooperative latching arrangement
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19926131B4 (de) * 1999-06-09 2007-04-19 Faun Gmbh Teleskop-Ausleger
US9085443B2 (en) 2009-01-27 2015-07-21 Manitowoc Crane Group France Sas Locking system for telescopic crane jib with movable locking unit
EP4357292A1 (en) 2022-10-21 2024-04-24 Oleodinamica Panni S.R.L. A blocking unit for telescopic systems, a hydraulic cylinder and a telescopic system

Also Published As

Publication number Publication date
ATE109113T1 (de) 1994-08-15
EP0476225A3 (en) 1992-10-28
DE59102333D1 (de) 1994-09-01
DE9013210U1 (de) 1991-01-03
EP0476225A2 (de) 1992-03-25

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