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EP3743367B1 - Grue à tour - Google Patents

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Publication number
EP3743367B1
EP3743367B1 EP19701337.8A EP19701337A EP3743367B1 EP 3743367 B1 EP3743367 B1 EP 3743367B1 EP 19701337 A EP19701337 A EP 19701337A EP 3743367 B1 EP3743367 B1 EP 3743367B1
Authority
EP
European Patent Office
Prior art keywords
boom
connection
counter
abutment surface
tower crane
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
EP19701337.8A
Other languages
German (de)
English (en)
Other versions
EP3743367A1 (fr
Inventor
Jochen Samulski
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 Biberach GmbH
Original Assignee
Liebherr Werk Biberach 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 Biberach GmbH filed Critical Liebherr Werk Biberach GmbH
Publication of EP3743367A1 publication Critical patent/EP3743367A1/fr
Application granted granted Critical
Publication of EP3743367B1 publication Critical patent/EP3743367B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/64—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for T- or I-section beams or girders
    • 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
    • B66C23/02—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 with non-adjustable and non-inclinable jibs mounted solely for slewing movements
    • 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
    • B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • 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
    • 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
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
    • B66C1/16—Slings with load-engaging platforms or frameworks

Definitions

  • the invention relates to a tower crane, in particular a top-slewing crane, with a boom and a counter-jib, the boom or counter-jib being articulated to the tower top and/or revolving platform by means of at least one connection point.
  • Jibs or counter-jibs of a tower crane are usually articulated via a non-positive connection to the tower top or any rotating platform in the area of the tower top.
  • Such connections should be articulated and should be able to be made without tools if possible.
  • the connection is usually made via several separate connection points.
  • connection points are known whose connection partners are locked together by means of a bolt, for example a bolt or a sheet metal bracket with a bolt.
  • the connection point is then articulated about a horizontal transverse axis, ie the locking axis. Since the force connection between the connection partners is provided by the bolt and the majority of the forces are thus introduced into the bolt it must therefore be comparatively large or large in size.
  • connection point in particular of the boom or counter-jib
  • steel safety ropes which are intended to take on a catching function, particularly during the armament process.
  • a disadvantage of the previous design is that there is no visibility of the movement of the boom or counter-jib during dismantling before the connection is finally released, ie during the removal of the bolt. Dismantling is carried out using an auxiliary crane that picks up the jib/counter jib. If this does not grip the boom/counter-jib exactly at its center of gravity, the boom/counter-jib can swing unpredictably away from the connection point after the lock has been released. In the worst case, the component can swing back into the crane structure in an uncontrolled manner and cause significant damage to the crane.
  • CN 201 850 084 U discloses a crane according to the preamble of claim 1.
  • the object of the present invention is to improve the connection of the boom and counter-jib to the crane tower.
  • a first connecting part that has a concave stop surface.
  • a second complementary connecting part of the connection point has a convex counter-stop surface.
  • the design of the stop surfaces ensures a certain relative movement of the connected crane parts to one another and thus ensures the desired articulation of the connection. Preferably, this enables a relative movement of the boom/counter-jib relative to the crane tower about a horizontal axis oriented transversely to the longitudinal axis of the boom.
  • the negative radius of curvature of the concave stop surface is matched to the positive radius of curvature of the convex counter-stop surface.
  • connection between the boom and the tower top or the counter-jib and the tower top and/or the rotating platform is preferably realized by means of several connection points.
  • corresponding connecting parts are provided on the respective end faces of the corner posts of a lattice boom.
  • the complementary connecting parts are located in the area of the tower top and can, for example, be provided on a corresponding connecting element of the crane tower or on a rotating platform installed in the area of the tower top.
  • the necessary pressure force which leads to the respective connecting parts being pressed together, is generated, for example, by the respective boom bracing of the counter-jib or jib, which pulls the jib or counter-jib in the direction of the tower top. In the same way, any load moment on the boom or counter-jib also leads to a corresponding compressive force.
  • the second connecting part is designed in the form of a connecting head, the connecting head being defined as a counter-stop surface by a defined radius.
  • the connecting head can be a head piece which protrudes from the end face of the boom or counter-jib, in particular the corner post, and which provides the corresponding radius at its end facing the tower top.
  • the connecting head forms at least a semicircle or half cylinder, with the central axis of the cylinder extending in the horizontal direction.
  • the first connecting piece is accordingly equipped as a complementary connecting socket for receiving the connecting head.
  • the connecting socket is designed by an adapted inner radius, which corresponds to the radius of the connecting head or is dimensioned slightly larger.
  • the inner wall of the connecting socket forms the appropriate stop surface of the first connecting part.
  • At least one connecting bolt is inserted or can be inserted to secure the connection point.
  • a horizontally aligned bolt proves to be advantageous here, which is inserted or can be inserted into corresponding bolt receptacles of the first and/or second connecting part.
  • the corresponding connecting bolt can be used to absorb tensile forces in the horizontal direction (boom direction). Since the pressure or tensile force ratio in the area of the connection point is significantly at the expense of the pressure forces carried by the stop surfaces, the connecting bolt can be dimensioned comparatively small. Ideally, there is a force ratio between compressive and tensile forces of around 10:1.
  • the bolt receptacle or the connecting bolt is located in the center of the convex counter-stop surface, ie in the center of the radius formed of the connecting head, which has advantages with regard to the pivoting movement of the jib or counter-jib.
  • connection point Another advantage of the connection point is the possibility of creating and/or releasing the connection without tools.
  • the boom part/counter-jib part to be assembled/dismantled is usually picked up by means of an auxiliary crane and brought into or removed from the connection area.
  • the crane operator of the auxiliary crane must bring the stop surfaces of the connection point together. It can be helpful if the moving boom part/counter-jib part is captured after rough alignment. This is preferably accomplished by means of one or more catching elements in the area of the moving boom part/counter-boom part.
  • At least one catch element is implemented as a catch eye, which is provided in the assembly or operating position above the stop surface or counter-stop surface on the second connecting part or on the boom or counter-jib.
  • the catch eye is in principle characterized by an opening through which a corresponding collecting means of the first connecting part or the tower top can be inserted, preferably in the horizontal direction.
  • the catching eye is sensibly dimensioned larger than the circumference or diameter of the collecting means used.
  • the boom or counter-jib can now be placed roughly in the area of the tower top and the collecting means can be inserted through the catch eye in order to ensure a rough alignment of the two components to one another.
  • the catch element in particular the catch eye, also has an essential function during the dismantling process.
  • the connection between the boom or counter-jib and the tower top is roughly secured by the collecting device inserted through the catch eye, so that the boom or counter-jib is prevented from swinging away.
  • the boom part or counter-boom part must first be aligned in an equilibrium position so that the collecting device floats freely within the catch eye. This prevents the boom or counter-jib from swinging away in an uncontrolled manner even after the collecting means has been removed.
  • the catch eye is formed by an opening within a sheet metal which is perpendicular to the connecting head.
  • the sheet metal extends vertically upwards from the connection head.
  • the connecting head and the catch eye can also be made in one piece.
  • one or more catch plates are provided in the area of the concave stop surface, i.e. in the area of the connecting socket, which simplify the bringing together of the stop surfaces, in particular the insertion of the connecting head.
  • the present invention also relates to a method for assembling a jib or counter-jib on a tower crane according to the present invention.
  • the process according to the invention is characterized by the following individual process steps: Moving the boom or counter-jib, preferably using an auxiliary crane, into the area of the tower top and catching the boom or counter-jib by inserting the collecting device through the catch eye. Fine adjustment of the boom or counter-jib and merging the convex counter-stop surface with the concave stop surface. Insert the bolt through the second connecting part. for pressing the stop surfaces together can be achieved by tensioning the boom bracing. Alternatively or additionally, the load moment can be generated by lowering the boom, which in turn causes the compressive force required in the stop.
  • the present invention also relates to a dismantling method for releasing the connection between the boom or counter-jib and the tower crane, which is designed according to the present invention.
  • the dismantling method according to the invention is characterized in that in a first step the bolt inserted through the second connecting part is first pulled. In this case, the connection point is only secured by the connection between the collecting device and the catching eye. In the following step, the boom or counter-jib is aligned so that the collecting means floats freely within the catching eye.
  • an appropriate lifting device for example an auxiliary crane, for receiving the boom or counter-jib grabs it at the center of gravity, so that the boom or counter-jib is prevented from swinging away in an uncontrolled manner.
  • the collecting means can then be removed and the boom or counter-jib can be completely dismantled. Before loosening the connecting bolt inserted through the second connecting part, any tensioning on the boom/counter-jib must be released.
  • FIGS 1 to 4 show different views of the novel connection point of the crane according to the invention, whereby the Figures 1a, 1b perspective side views of the existing connection Figure 2 a sectional view in the longitudinal direction through the existing connection Figures 3a, 3b perspective side views of the second connecting part and the Figures 4a, 4b show perspective views of the first connecting part.
  • a single connection point is shown, but the overall connection between the boom/counter-jib and the crane tip is made via a large number of such connection points.
  • the first connecting part 10 is part of the crane tip or a rotating platform provided on the crane tip and is separately in the Figures 4a, 4b shown.
  • This is designed in the form of a connecting socket 11, the inner wall 12 of which has a concave shape with a negative radius of curvature.
  • side plates 13a, 13b are attached, in particular screwed to the connecting part 10, which initially lie parallel to one another, but are angled outwards in the cantilever direction, forming an insertion funnel.
  • the angled areas 14a, 14b form insertion aids for inserting the complementary connecting part 20 into the connecting socket 11.
  • the side plates 13a, 13b also protrude beyond the upper edge of the first connecting part 10 and look at it
  • the complementary second connecting part 20, separately in the Figures 3a, 3b shown, is formed by the connecting head 21, which extends at the front from the corresponding articulation area of the boom/counter-boom in the direction of the crane tip.
  • the connecting head 21 includes a convex counter-stop surface 22, the positive radius of curvature of which is dimensioned slightly smaller than the radius of the stop surface 12.
  • both connecting parts 10, 20 can be pivoted relative to one another about a horizontal axis due to the coordinated radii, which is particularly advantageous during the assembly process.
  • the connection is essentially non-positive, since the second connecting part 20 or the boom/counter-jib is pulled by a bracing in the direction of the tower top or into the connecting socket 12.
  • Opposite tensile forces are transferred by the connecting bolt 35, which is inserted transversely to the longitudinal axis of the boom through corresponding bores 15 in the side plates 13a, 13b and a central bore 25 in the connecting head 22.
  • the connecting bolt 35 thus also forms the pivot axis of the two connecting parts 10, 20.
  • there is a force ratio of approximately 10:1 between compressive and tensile forces which is why the connecting bolt 35 can be dimensioned significantly smaller due to the comparatively low tensile forces.
  • the width of the connecting socket 12 should be larger than the width of the connecting head 22.
  • a sheet metal 30 extends vertically upwards and has a large-sized circular opening 31.
  • This opening serves as a catch eye 31, which serves, among other things, to catch the boom/counter-jib during crane assembly.
  • a catch bolt 36 can be inserted as a catch means through the catch eye 31 and the bores 16 in the side plates 13a, 13b.
  • the cantilever part/counter-cantilever part captured in this way can be more easily aligned into the final position for establishing the connection, ie the connecting head 22 is inserted into the connecting socket with the support of the insertion aids 14a, 14b.
  • the connecting bolt 35 is inserted and the boom bracing is tensioned or the top chord strap is connected.
  • the diameter of the capture bolt 36 is significantly smaller than the diameter of the capture eye 31, which significantly simplifies the capture of the second connecting part.
  • the safety eye also takes on a safety function during the dismantling process in order to prevent the boom or counter-jib from swinging away in an uncontrolled manner.
  • the boom or counter-jib is picked up by the auxiliary crane and the connecting bolt 35 is pulled. This results in a comparatively small movement of the jib or counter-jib, unless it was picked up exactly at its center of gravity by the auxiliary crane.
  • this oscillating movement is limited by the catch bolt 36 that is still inserted and which strikes the inner wall of the catch eye 31.
  • the crane driver of the auxiliary crane must align the boom or counter-jib so that the catch bolt 36 floats within the catch eye, i.e. does not hit the inner edge. If this is the case, the picked-up boom part/counter-jib part is in balance and an undesirable swinging movement after the capture bolt 36 has been pulled can be ruled out. The boom or counter-jib can then be safely lowered by the auxiliary crane.
  • connection point according to the invention is the Figure 5 refer to.
  • This embodiment differs in terms of the features essential to the invention in the design of the connecting part 20.
  • the connecting head 21 'and the catch eye 31' are in one piece here executed.
  • the catch eye 31' also does not have a circular opening but instead has an oval or rectangular opening with rounded corners.
  • the Figures 6 , 7 each show an overall view of a tower crane, the boom 20 of which is mounted in area 1 by means of the connection point according to the invention on the crane tip or a rotating platform provided there.
  • the non-positive connection is achieved because the second connecting part 20 (boom/counter-boom) is pulled by the bracing 2 in the direction of the tower top or into the connecting pan 12.
  • This force is caused by the load moment of the jib/counter jib.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)

Claims (12)

  1. Grue à tour, de préférence grue à tour pivotante, de manière particulièrement préférée grue à tour pivotant en haut, dotée d'une flèche ainsi que d'une contre-flèche, la flèche et/ou la contre-flèche étant articulées sur le sommet de la tour et/ou la tourelle au moyen d'au moins un point de liaison, une première pièce de liaison (10) de l'au moins un point de liaison présentant une surface de butée (12) concave et une seconde pièce de liaison (20) du point de liaison comprenant une surface de contre-butée (22) convexe, la surface de contre-butée (22) de la seconde pièce de liaison (20) agissant sur la surface de butée (12) de la première pièce de liaison (10) par une force de pression pour réaliser une liaison par friction entre les pièces de liaison (10, 20),
    caractérisée en ce que
    la seconde pièce de liaison (20) comprend une tête de liaison (21) avec un rayon défini en guise de surface de contre-butée (22) et la première pièce de liaison (10) est réalisée comme coussinet de liaison (11) avec un rayon intérieur adapté au rayon de la tête de liaison (21) en guise de surface de butée (12).
  2. Grue à tour selon la revendication 1, caractérisée en ce que la force de pression est engendrée par au moins un tirant de flèche (2) et/ou un couple de charge.
  3. Grue à tour selon l'une des revendications précédentes, caractérisée en ce qu'au moins un boulon de liaison (35) peut être introduit dans la direction horizontale, en particulier transversalement à l'axe longitudinal de flèche, pour la fixation de la liaison, en particulier pour l'absorption d'efforts de traction, des logements de boulon correspondants étant idéalement prévus aussi bien sur la première pièce de liaison (10) et/ou la seconde pièce de liaison (20).
  4. Grue à tour selon la revendication 3, caractérisée en ce qu'un logement de boulon pour le boulon de liaison (35) est formé par un trou au centre de la surface de contre-butée (22) convexe, en particulier au centre du rayon de la tête de liaison (21).
  5. Grue à tour selon l'une des revendications précédentes, caractérisée en ce que l'au moins un point de liaison est disposé directement sur le sommet de tour ou sur une tourelle prévue dans la zone (1) du sommet de tour.
  6. Grue à tour selon l'une des revendications précédentes, caractérisée en ce que la première pièce de liaison (10) fait partie du sommet de tour ou de la tourelle et la seconde pièce de liaison (20) est disposée sur la flèche ou la contre-flèche.
  7. Grue à tour selon l'une des revendications précédentes, caractérisée en ce que, dans la position de montage, au moins un oeil d'accrochage (31) est prévu au-dessus de la surface de butée (12) ou de la surface de contre-butée (22) sur la seconde pièce de liaison (20) ou la première pièce de liaison (10), à travers lequel s'étend au moins un moyen de prise, en particulier un boulon de saisie (36), l'œil d'accrochage (31) étant de préférence dimensionné sensiblement plus grand que la circonférence, en particulier le diamètre du moyen de prise.
  8. Grue à tour selon la revendication 7, caractérisée en ce que l'œil d'accrochage (31) est formé par une ouverture dans une tôle (30) qui est perpendiculaire à la tête de liaison (21).
  9. Grue à tour selon l'une des revendications précédentes, caractérisée en ce qu'une ou plusieurs tôles de saisie sont prévues dans la zone de la surface de butée (12) concave, en particulier dans la zone du coussinet de liaison (11), lesdites tôles de saisie aidant à réunir la surface de contre-butée (22) convexe et la surface de butée (12) concave pendant le montage de la flèche.
  10. Procédé de montage d'une flèche ou contre-flèche sur une grue à tour selon les revendications 4 et 7, comportant les étapes suivantes :
    a. transfert de la flèche et/ou contre-flèche dans la zone du sommet de tour et saisie de la flèche/contre-flèche par le passage du moyen de prise à travers l'œil d'accrochage,
    b. réglage fin de la flèche ou contre-flèche pour réunir la surface de butée et la surface de contre-butée ainsi qu'introduction du boulon à travers la seconde pièce de liaison.
  11. Procédé selon la revendication 10, caractérisé en ce que, après l'introduction du boulon, un tirant de flèche est tendu ou le couple de charge est généré par la descente de la flèche pour appliquer la force de pression nécessaire sur le point de liaison.
  12. Procédé de démontage d'une flèche ou contre-flèche sur une grue à tour selon les revendications 4 et 7, comportant les étapes de procédé :
    a. retrait du boulon introduit à travers la seconde pièce de liaison,
    b. orientation de la flèche/contre-flèche de telle sorte que le moyen de prise flotte librement dans l'œil d'accrochage
    c extraction du moyen de prise.
EP19701337.8A 2018-01-25 2019-01-21 Grue à tour Active EP3743367B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018101705.7A DE102018101705A1 (de) 2018-01-25 2018-01-25 Turmkran
PCT/EP2019/051389 WO2019145260A1 (fr) 2018-01-25 2019-01-21 Grue à tour

Publications (2)

Publication Number Publication Date
EP3743367A1 EP3743367A1 (fr) 2020-12-02
EP3743367B1 true EP3743367B1 (fr) 2023-10-18

Family

ID=65199420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19701337.8A Active EP3743367B1 (fr) 2018-01-25 2019-01-21 Grue à tour

Country Status (7)

Country Link
US (1) US11731864B2 (fr)
EP (1) EP3743367B1 (fr)
CN (1) CN111801292B (fr)
BR (1) BR112020014762A2 (fr)
DE (1) DE102018101705A1 (fr)
RU (1) RU2754013C1 (fr)
WO (1) WO2019145260A1 (fr)

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US4491229A (en) * 1981-02-25 1985-01-01 Fmc Corporation Boom extension stowage system
US4529094A (en) * 1983-08-22 1985-07-16 Harnischfeger Corporation Articulation for tower crane boom that has a parking position
RU2225346C2 (ru) 1998-03-27 2004-03-10 Лунден Евгений Ефимович Башенный кран и способ его монтажа
FR2788758B1 (fr) * 1999-01-27 2001-02-23 Potain Sa Procede et dispositif pour le montage de la tete de mat des grues a tour
US7878346B1 (en) * 2008-08-25 2011-02-01 Link-Belt Construction Equipment Co., L.P., Lllp Adaptable boom extension for a mobile crane having a telescoping boom
CN201850084U (zh) 2010-10-08 2011-06-01 长沙中联重工科技发展股份有限公司 起重臂与上支座的连接结构及具有该结构的起重机
CN103171978B (zh) 2013-04-02 2015-03-11 中联重科股份有限公司 快装接头和具有该快装接头的塔式起重机
CN203545532U (zh) 2013-11-26 2014-04-16 中联重科股份有限公司 接头装置及具有该接头装置的塔机
EP2907786B1 (fr) * 2014-02-17 2016-04-13 Terex Cranes Germany GmbH Connecteur, grue de combinaison et procédé de connexion

Also Published As

Publication number Publication date
US20210114849A1 (en) 2021-04-22
US11731864B2 (en) 2023-08-22
DE102018101705A1 (de) 2019-07-25
RU2754013C1 (ru) 2021-08-25
WO2019145260A1 (fr) 2019-08-01
EP3743367A1 (fr) 2020-12-02
CN111801292A (zh) 2020-10-20
BR112020014762A2 (pt) 2020-12-08
CN111801292B (zh) 2022-08-26

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