EP3825274A1 - Grue pourvu de support de soulèvement - Google Patents

Grue pourvu de support de soulèvement Download PDF

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Publication number
EP3825274A1
EP3825274A1 EP20208949.6A EP20208949A EP3825274A1 EP 3825274 A1 EP3825274 A1 EP 3825274A1 EP 20208949 A EP20208949 A EP 20208949A EP 3825274 A1 EP3825274 A1 EP 3825274A1
Authority
EP
European Patent Office
Prior art keywords
crane
boom
erecting
swivel joint
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.)
Pending
Application number
EP20208949.6A
Other languages
German (de)
English (en)
Inventor
Körtge Stephan
Helmut Fischer
Christian Matt
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 MCCtec Rostock GmbH
Original Assignee
Liebherr MCCtec Rostock 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 MCCtec Rostock GmbH filed Critical Liebherr MCCtec Rostock GmbH
Publication of EP3825274A1 publication Critical patent/EP3825274A1/fr
Pending 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
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B66C23/823—Bracing equipment acting in vertical direction
    • 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
    • B66C23/18—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 specially adapted for use in particular purposes
    • B66C23/36—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/52—Floating cranes
    • 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

Definitions

  • the present invention relates to a crane with a stand, in particular a ship crane with a stand.
  • An erecting trestle is an auxiliary device for erecting and holding a crane boom.
  • the erecting trestle typically extends firmly from a crane base on which the erectable boom is also pivotably arranged.
  • the overall height of the crane is significantly reduced so that it can pass under height-limiting obstacles.
  • the maximum height of a crane set in this way is then determined by the height of the erecting frame. A rope connected to the jib is guided over this in order to straighten the jib when the rope length is shortened.
  • the erecting trestle is in a transit state, or a state in which the boom is lowered or put down, which is by far the highest point on the crane.
  • This also applies in particular to a ship on which such a crane is installed.
  • This aspect leads to problems when passing through the Ship or another vehicle on which the crane is installed, as the maximum height is problematic when driving under obstacles such as bridges, high-voltage lines, etc.
  • the crane according to the invention in particular a ship's crane or another crane mounted on a vehicle, comprises a boom that can be erected in its height about an axis of rotation, and an erecting frame for deflecting a rope of a drawing-in mechanism in order to erect the boom.
  • the crane is characterized in that the erecting trestle can be raised in its height, and the erecting trestle preferably comprises a pull rod which has a swivel joint in order to rotate a first section of the pull rod relative to a second section of the pull rod.
  • the twisting of the pull rod of the erecting frame enables the erecting frame to be folded in, so that it can take up less space in its height expansion.
  • the erecting trestle can accordingly also be folded down, so that the overall height of the crane is then further reduced.
  • a crane in which the erecting frame can be folded or folded down (or can also be erected) has a lower center of gravity, which is advantageous for the vehicle, for example a ship, at the front.
  • the lowering of the total height also has the effect that the area exposed to wind of the crane, which is in its transport state, also has the effect is reduced, so that this also results in advantages when transporting the crane on the vehicle carrying the crane.
  • the swivel joint of the pull rod can be locked in order to fix the erecting frame in its erected position, preferably with the swivel joint being locked via a hydraulic cylinder.
  • a locking mechanism of the swivel joint of the pull rod ensures that it is rigid.
  • hydraulic cylinders can be used which fix the mutually movable sections of the tension rod so that the boom can be erected in the usual way.
  • the swivel joint of the pull rod divides the straight course of the pull rod in its erected position of the erecting frame into two mutually movable sections, which are preferably movable relative to each other about a kind of hinge joint. By pivoting the two sections towards each other, the pull rod is folded and its height is reduced as a result.
  • the crane can be designed, when the boom is put down, the erecting frame is in an erected state and the swivel joint is unlocked, to lower the erecting frame by actuating the pull-in mechanism, preferably with the erecting frame being raised during lowering the weight of the stored boom.
  • the swivel joint of the tension rod is a hinge joint, with its axis of rotation preferably being parallel to the axis of rotation of the erectable boom.
  • the boom and the erecting stand can be set down in mutually opposite directions.
  • the crane further comprises a crane base from which the boom and the erecting trestle extend and on which the drawing-in mechanism is preferably arranged.
  • the crane base is thus the starting point for both the boom and the erecting frame and has corresponding joints in order to attach both the boom and the erecting frame to the crane base in an erectable manner.
  • the erecting stand has a deflection pulley at its distal end region for guiding a cable of the drawing-in mechanism.
  • the boom has a deflection pulley at its distal end region for guiding a cable of the drawing-in mechanism.
  • a simple attachment of the rope to the boom can also be provided.
  • the rope is typically guided back towards the erecting frame, where it is then fixed. This reduces the forces required to erect the boom.
  • the erecting stand comprises a rigid rod-like element in addition to the pull rod, which is connected to the pull rod in the deflection area of the cable of the draw-in mechanism via a swivel joint. If the pull rod were not designed to be foldable, the erecting stand could not be put down.
  • the rigid rod-like element can be pivoted at its end facing the crane base, so that the rod-like element can be folded down when the pull rod is "folded".
  • the boom, the rigid rod-like element and also the tension rod are each arranged on a crane base via an associated swivel joint, with the axes of rotation of the swivel joints arranged on the crane base preferably being arranged parallel to one another.
  • the axis of rotation of the swivel joint which divides the tension rod into two mutually rotatable sections, can also be parallel to the axes of rotation of the other swivel joints.
  • the crane can also be equipped with a storage winch for picking up a certain rope length of the rope operated by the drawing-in mechanism, the storage winch preferably being arranged on the erecting trestle, in particular on the pull rod or the rigid rod-like element.
  • the additional rope length required for lowering the erecting trestle can accordingly first be transferred from the storage winch to the pull-in winch, in order then to lower the erecting trestle by actuating the pulling-in winch.
  • the advantage of this implementation is that when the erecting frame is erected, the pull-in winch only has to wind as many layers of rope as is necessary for active crane operation. This in turn has a positive effect on the winding behavior of the pull-in winch, since it has to set less unused rope in motion during operation.
  • the crane can also be provided with a storage point for supporting the stored tension rod in its storage position in order to relieve the pulling mechanism.
  • the swivel joint of the tension rod has a mechanical stop in order to prevent the tension rod from being deposited in the direction of the boom.
  • the erecting stand preferably the pull rod in its fully upright position
  • the erecting stand is directed slightly obliquely away from the boom, in order to fold it backwards, i.e. away from the boom, when the swivel joint of the pull rod is unlocked.
  • the erection frame is put down by gravity, with the hydraulic cylinders provided for locking the swivel joint preferably supporting the putting down by means of a corresponding bias.
  • the invention also includes a lock for the boom in a stored or lowered position.
  • a lock for the boom in a stored or lowered position.
  • FIG. 1 shows a schematic view of the crane 1 according to the invention.
  • a boom 2 extends from a crane base 12 and is shown in FIG Fig. 1 is shown in an already stored or lowered state.
  • the boom 2 is coupled to the crane base 12 via a base swivel joint 19 so that the boom 2 can be pivoted on this base swivel joint 19.
  • the pivot axis 3 extends essentially perpendicular to the longitudinal extent of the boom 2.
  • the boom 2 including any load attached to the boom 2 is held by the draw-in mechanism 6.
  • the load radius that is, the radius of the crane 1 can be changed by actuating the pull-in mechanism 6 become.
  • the geometry of the erecting frame 4 is selected in such a way that an optimum of system forces is created via favorable leverage ratios.
  • a deflection pulley 14 is provided, which cooperates with a cable 5 extending therefrom at an angle upwards.
  • This rope 5 is guided via an erecting trestle 4 to a cable winch 6 (also: pulling-in) arranged on the crane base 12, so that a reduction in the length of the rope in the case of a rigid erecting trestle 4 results in the boom 2 being erected.
  • the erecting frame 4 comprises a pull rod 7 and an optional further rod-like element 15, which can be rigid.
  • both the pull rod 7 and the rod-like element 15 have a base swivel joint 17, 18 which enables a pivoting movement.
  • the axes of rotation of the basic swivel joints 17, 18 and 19 are present parallel, although this does not have to be the case in principle for the invention.
  • the tension rod 7 and the rod-like element 15 are connected to one another at their ends remote from the crane base 12 via a swivel joint 16 in the form of a hinge joint.
  • the pull rod 7 is arranged further away from the boom 2 than the rod-like element 15, that is to say is offset to the rear with respect to the rod-like element 15.
  • the pull rod 7 is not formed in one piece, but rather comprises two sections 9, 10 which can be folded towards one another and which can be moved or rotated towards one another via a swivel joint 8. Because of this swivel joint 8, it is possible to lower the erecting frame 4 to the rear, that is to say away from the boom 2, in order to reduce the maximum height of the crane during transport or the like.
  • the erecting frame 4 can integrate the retraction mechanism 6 of the boom 2, with which the boom angle can be adjusted.
  • the boom 2 including the load is held by the retraction mechanism 6, the load radius (overhang) can be changed by actuating the retraction mechanism 6.
  • the pull rod 7 has the additional swivel joint 8 with which two sections 9, 10 of the pull rod 7 can be rotated relative to one another.
  • this joint 8 is locked and ensures a straight alignment of the two sections 9, 10 which make up the pull rod 7.
  • the joint 8 is then unlocked for the setting down of the erecting frame 4.
  • the joint lock takes place via one or more hydraulic cylinders 11.
  • the folding of the erecting frame 4 takes place primarily or exclusively via the draw-in mechanism 6.
  • the Retraction mechanism 6 is supported on boom 2 or on its own weight.
  • the support can be provided by the boom weight or an additional boom lock (not shown).
  • the center of gravity of the erecting frame 4 causes the erecting frame 4 to fold down to the rear.
  • the section 9 of the pull rod 7 facing the crane base 12 rotates clockwise away from the boom, so that the tip region of the erecting frame 4 facing away from the crane base 12 is lowered.
  • the lower section 9 is rotated backwards and downwards through an angular range of approx. 140 ° to 170 ° until the section 9 rests on a placement point 21 of the crane base 12.
  • the lowering movement of the trestle 4 can essentially be divided into two parts, initially only the swivel joint 8 is moved into an open position, which leads to a lowering of the trestle tip due to the simultaneous rotation of the lower section 9 backwards and downwards.
  • the upper section 10 remains in approximately the same orientation in this phase, but works of course already with a circular arc shape, which is predetermined by the rotation of the lower section on the base swivel joint 18.
  • This process can also be supported by hydraulic cylinders 11 in the form of a preload.
  • the hydraulic cylinders can also ensure that the pull rod 7 is specifically converted into a lowering movement.
  • a mechanical stop 22 prevents the pull rod 7 from being deflected forwards. Furthermore, a deflection to the front by the dead weight of the erecting frame 4 is prevented, since its components are arranged in such a way that it folds backwards in an unlocked state and when the cable is added.
  • the depositing process is carried out by a depository 21 (cf. Fig. 2 ) which receives the first section 9 and / or the second section 10 of the tension rod 7.
  • the shelf can be designed in such a way that longer transit journeys of the ship or of the vehicle picking up the crane are possible.
  • the pull-in system can be relieved, ie the pull-in ropes are load-free.
  • Fig. 3 shows the two different positions of the erecting frame 4 that can be achieved by means of the invention, the regular working position of the erecting frame 4 being shown in solid, continuous lines, whereas the folded or folded position of the erecting frame 4 is shown with dashed lines.
  • either the required additional rope length can be unwound directly from the pull-in winch 6 or - if there is a storage winch 20 - the required additional rope length can first be transferred from the storage winch 20 to the pull-in winch 6, and then the erecting trestle 4 by actuating the pull-in winch 6 to drain.
  • the advantage of this system is that when the erecting trestle 4 is erected, the pull-in winch 6 only has to move as much rope 5 as is required for active crane operation, which in turn has a positive effect on the winding behavior of the pull-in winch 6.
  • the cable winch 6 therefore does not have to rotate the cable length required for the setting down of the erecting frame during regular working operation, so that the efficiency of the cable winch 6 is improved.
  • the erecting stand 4 can have several tension rods 7 of the aforementioned type. So is through the side view of the Figures 1-3 not excluded that there is at least one further tension rod 7 and / or at least one further rod-like element 15, which are arranged offset in the width direction of the crane 1 (that is, perpendicular to the longitudinal extension of the boom 2).
  • the multiple tension rods 7 and / or the multiple rod-like elements 15 can be attached to a common tip area of the Be erecting trestle 4 connected to one another, the basic principle of folding down the erecting frame 4, however, is not impaired.
EP20208949.6A 2019-11-22 2020-11-20 Grue pourvu de support de soulèvement Pending EP3825274A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202019106512.5U DE202019106512U1 (de) 2019-11-22 2019-11-22 Kran mit Aufrichtbock

Publications (1)

Publication Number Publication Date
EP3825274A1 true EP3825274A1 (fr) 2021-05-26

Family

ID=73543141

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20208949.6A Pending EP3825274A1 (fr) 2019-11-22 2020-11-20 Grue pourvu de support de soulèvement

Country Status (4)

Country Link
US (1) US11577943B2 (fr)
EP (1) EP3825274A1 (fr)
CN (1) CN214734013U (fr)
DE (1) DE202019106512U1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335877A (en) * 1966-04-18 1967-08-15 Bucyrus Erie Co Lowerable a-frame assembly for mobile cranes and the like
JP2000198672A (ja) * 1999-01-08 2000-07-18 Hitachi Constr Mach Co Ltd 建設機械のａ型フレ―ム
CN103171977A (zh) * 2013-02-28 2013-06-26 武桥重工集团股份有限公司 一种有折叠倒置功能a字架的大型起重设备
DE102013225219A1 (de) * 2012-12-11 2014-06-12 Hitachi Sumitomo Heavy Industries Construction Crane Co., Ltd. Baumaschinenaufbau

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7907258U1 (de) * 1979-03-15 1979-08-16 Hatlapa Uetersener Maschinenfabrik Gmbh & Co, 2082 Uetersen Kran mit kopfrolle, insbesondere drehkran fuer seegehende binnen-schiffe
US4635803A (en) * 1983-06-29 1987-01-13 Fmc Corporation Compact pedestal-mount crane
DE3339519A1 (de) * 1983-11-02 1985-05-15 Horst 2150 Buxtehude Bredemeier Kran mit abklappbarem saeulenoberteil
JP4770978B2 (ja) * 2009-07-16 2011-09-14 コベルコクレーン株式会社 建設機械のガントリ構造
JP5847694B2 (ja) * 2012-12-11 2016-01-27 日立住友重機械建機クレーン株式会社 建設機械
DE202015008775U1 (de) * 2015-12-22 2017-03-23 Liebherr-Werk Nenzing Gmbh Kran mit Auslegeraufrichtesystem
JP6260651B2 (ja) * 2016-06-30 2018-01-17 コベルコ建機株式会社 建設機械のガントリ構造
NL2019511B1 (en) * 2017-09-08 2019-03-19 Mammoet Eng B V Crane comprising first mast with tiltable first mast upper part
NL2022877B1 (en) * 2019-04-05 2020-10-12 Itrec Bv heave compensated dual hoist crane

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335877A (en) * 1966-04-18 1967-08-15 Bucyrus Erie Co Lowerable a-frame assembly for mobile cranes and the like
JP2000198672A (ja) * 1999-01-08 2000-07-18 Hitachi Constr Mach Co Ltd 建設機械のａ型フレ―ム
DE102013225219A1 (de) * 2012-12-11 2014-06-12 Hitachi Sumitomo Heavy Industries Construction Crane Co., Ltd. Baumaschinenaufbau
CN103171977A (zh) * 2013-02-28 2013-06-26 武桥重工集团股份有限公司 一种有折叠倒置功能a字架的大型起重设备

Also Published As

Publication number Publication date
CN214734013U (zh) 2021-11-16
DE202019106512U1 (de) 2021-02-26
US20210155462A1 (en) 2021-05-27
US11577943B2 (en) 2023-02-14

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