EP3841054A1 - Kran - Google Patents
KranInfo
- Publication number
- EP3841054A1 EP3841054A1 EP19758698.5A EP19758698A EP3841054A1 EP 3841054 A1 EP3841054 A1 EP 3841054A1 EP 19758698 A EP19758698 A EP 19758698A EP 3841054 A1 EP3841054 A1 EP 3841054A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jib
- guying
- boom
- guy
- counter
- 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
Links
- 238000005452 bending Methods 0.000 claims description 26
- 230000001154 acute effect Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 description 4
- 241001270131 Agaricus moelleri Species 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
-
- 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
- B66C23/022—Pivot axis common with column
-
- 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
- B66C23/16—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 jibs supported by columns, e.g. towers having their lower end mounted 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
- B66C23/72—Counterweights or supports for balancing lifting couples
Definitions
- the present invention relates to a crane, in particular in the form of a tower crane, with a jib and a counter jib which are articulated on a jib articulation piece, the jib comprising an outer jib part which is articulated on an inner jib part and by a guy is held.
- first guy rod can be attached to about one third of the total boom length and a second guy rod can be attached to about two thirds of the total boom length.
- the "total" boom length means the boom without counter-boom, ie the boom part on which the trolley moves.
- the guying is usually also guided backwards to this counter jib.
- the guying is guided downwards via the tower tip or guy strut, which is then inclined backwards.
- Tower cranes have also become popular in recent times, which do without such jib bracing and instead reinforce the jib itself to such an extent that it can absorb the forces as a cantilever jib.
- Such topless tower cranes are sometimes referred to as "flat-top” cranes or “topless” cranes or “hammer-head” cranes because they lack the tower top that rises above the jib.
- Important advantages of such topless tower cranes are essentially the lower height and a simple assembly process.
- the document EP 2 041 017 B1 shows such a centerless tower crane and proposes an assembly method for this purpose, which should facilitate the construction of the crane.
- the document DE 10 2005 018 522 B4 also shows such a centerless tower crane, with the overall bracing-free cantilever boom having several bearing points in order to be able to be mounted at different locations on the upper end of the tower, so that the counter jib has a greater length and gets a smaller length once.
- Another centerless tower crane is known, for example, from GB 14 93 715 or the brochure "The EC-B flat-top cranes" from Liebherr-Werk Biberach GmbH.
- the document ES 22 64 334 A1 shows a comparison between a guyed tower crane with a tower top and a topless flat top crane. It proposes to mount the counter jib a bit higher than the jib in order to further simplify the assembly.
- Tower cranes in which the jib bracing is kept very short are known, for example, from the Spanish company JASO under the type designation H series, for example model variant J560. There, the jib is made relatively solid up to the jib tip in order to be able to absorb the bending forces and moments that occur, which makes the crane relatively heavy and solid overall.
- the present invention is based on the object of creating an improved crane of the type mentioned at the outset which avoids disadvantages of the prior art and advantageously develops the latter.
- a simpler assembly of the jib and the bracing of the crane, in particular also by reducing the assembly weights, is to be achieved without having to accept static disadvantages with regard to the load-bearing capacity.
- the inner boom part is designed as a bending beam which is fastened and held in a bending-resistant manner on the boom link piece, while the outer boom part is is articulated to the bending beam and is held by a guy.
- Such a hybrid construction of the boom simplifies the assembly of the crane considerably.
- the assembly effort for the inner jib part is considerably reduced, since the bending beam only needs to be attached to the articulation piece and is thereby already held stable.
- the effort for attaching the guying is also reduced, since in comparison to the usual double bracing boom variants, only the outer boom part needs to be braced and the guy bracket of conventional guying variants can be omitted. Furthermore, the assembly weight is also reduced, in particular if the central part or the articulation piece is of split design. Finally, a statically determined system is obtained.
- the inner jib part mentioned can remain entirely without bracing and can be held solely by the rigid connection to the jib piece, so that the bracing only goes to the outer jib part and only the outer jib part is braced.
- the inner boom part which is designed as a bending beam, can advantageously comprise more longitudinal belts than the outer boom part.
- the inner boom part can be constructed from four longitudinal belts, while the outer boom part is formed from only three longitudinal belts, so that the inner boom part has a rectangular or trapezoidal profile, while the outer boom part can have a triangular profile in cross section.
- both the inner boom part and the outer boom part can each be designed as a truss, in which the longitudinal belts are rigidly connected to one another by transverse belts or struts.
- the boom is advantageously designed as a cat boom.
- the inner boom part and the outer boom part - irrespective of their respective number of longitudinal belts - have two longitudinal belts, which have a constant spacing over the boom length and / or can form a continuous track across the interface between the inner and outer boom part.
- the height of the jib pieces - viewed in profile or cross-section - can be designed differently, in particular the cross-sectional profile of the outer jib part can have a smaller height than the profile cross-section of the inner jib part.
- the inner jib part does not have a profile height that is constant over its length, for example because a jib piece with decreasing profile height and / or reduced profile height is provided at the outer end of the inner jib part, at least one inner section of the inner jib part - that is to say one arranged to the articulation piece and / or a piece of the inner cantilever part attached to it - have a profile cross-sectional height that is greater than a maximum profile cross-sectional height of the outer cantilever part.
- the guying for the outer boom part can in principle be designed differently, whereby different guying variants can advantageously be provided for different boom lengths and / or payloads.
- the guying for the outer boom part can be single-stranded, whereby with such a single-strand construction two parallel guy ropes or rods can also be provided, which are attached to the outer boom part at the same distance from the articulation piece can.
- a single guy rope or a single guy rod can be guided to the outer boom part.
- Said guying can be guided inwards from the outer jib part inwards over the inner jib part and can optionally be fastened directly to the articulation piece on which the inner jib part designed as a bending beam is attached, or can be guided to a guying tip , which is placed on the mentioned link.
- an advantageous further development can provide a detachable connection between the cantilever tip mentioned and the articulation piece, so that different, in particular differently high guying tips are placed on the articulation piece to which the inner jib part is fastened in a bending-resistant manner can, depending on the way in which the guying from the outer boom section is to be returned to the inside.
- the guying from a guying tip to the outer boom part can run at a constant acute angle to the longitudinal axis of the boom and / or without a guying support or a guy bracket between the two articulation points of the guying on the outer boom part on the one hand and at the guying tip on the coupling piece on the other hand so that the guying is self-supporting between the outer boom part and the guying tip.
- a guying tip of smaller height can also be mounted on the articulation piece and / or the guying can be guided over a guying support, so that the guying over the inner boom part runs essentially or at least approximately parallel to the longitudinal axis of the inner boom part.
- the guying initially rises from its articulation point on the outer jib part at an acute angle to the inner jib part until the guying strikes the above-mentioned guy support to run inwards from the guy support approximately parallel to the longitudinal axis of the inner jib part.
- the above-mentioned guy support can in principle be attached at various points on the boom, for example in the region of the inner boom part designed as a bending beam. In particular, it can be advantageous if the above-mentioned guy support is attached approximately in the region of the interface between the inner boom part and the outer boom part.
- the above-mentioned guy support can protrude above the maximum height of the inner jib part or its profile, for example by an amount that can approximately correspond to the height of the profile of the inner jib part.
- other guy support heights can also make sense.
- the guying can also be configured sloping inwards towards the articulation piece and / or in particular guided to the articulation piece itself, to which the inner bending beam part of the jib is also attached.
- a guying tip on the articulation piece can also be dispensed with entirely, in which case the guying for the outer boom part is led directly to the articulation piece.
- a detachable bolt connection can be provided, for example, as a releasable connecting means between the guying tip and the boom link piece.
- the releasable connecting means between the articulation piece and the guying tip are rigid, in order to achieve a firm, rigid connection of the guying tip on the articulation piece.
- the counter jib can also be configured differently and / or adapted to the respective jib configuration.
- the counter jib mentioned and / or a counter jib guying can be attached to the guying of the jib and / or the respective because the guy tip used and / or an unused guy tip are adjusted.
- Said counter-jib can advantageously also be designed as a hybrid jib and comprise an inner counter-jib part which can be designed as a bending beam which can be fastened to the articulation piece to which the jib is also fastened.
- the counter jib can comprise an outer counter jib part which is articulated to the inner counter jib part and is held by a counter jib guying.
- the mentioned outer counter jib part can take up the ballast weight and / or carry further functional components, such as, for example, the winch for the hoisting rope.
- the counter jib guying holding the outer counter jib part can be adapted to the guying of the jib and can advantageously be attached at its inner end where the guying of the jib is also attached.
- the counter jib guying is advantageously attached to said guying tip.
- the counter jib guying can be guided back inwards in different ways from its articulation point on the outer counter jib part.
- the counter jib guying can be guided over a guy support, which can protrude above the maximum fleas of the inner counter jib part.
- a guy support for the counter jib bracing can be attached at different locations, for example in the area of the inner counter jib part.
- the above-mentioned guy bracket support can be used in the area of the interface between the inner counter jib part and the outer counter jib part.
- the height of the counter-boom guy support above the counter-boom can be significantly higher than that of the guy tip, which is attached to the articulation piece, so that the counter-boom guy in the area between guy guy and guy tip is roughly approximate has a horizontal course.
- the height of the guy support used on the counter jib can thus be advantageously adapted to the guy tip used.
- the counter-jib guying can also be attached to the inner counter-jib part, which is designed as a bending beam, in particular to an upper longitudinal belt of the inner counter-jib part or a guying-articulation part connected thereto.
- FIG. 1 is a side view of a crane in the form of a tower crane of an advantageous embodiment of the invention
- FIG. 2 shows a side view of the jib of the crane from FIG. 1, which shows the inner jib part designed as a bending beam and the outer, braced jib part, the partial views A, B and C including different guying variants of the guying of the outer jib part differently high guy points and without guy point
- Fig. 3 is a side view of the counter jib of the crane of Fig. 1, the
- Partial views X, Y and Z show different guy variants of the counter jib guy.
- the crane 1 can be designed as a tower crane which comprises an upright tower 2.
- the tower 2 mentioned can be designed as a truss and, for example, have a rectangular cross section.
- a boom 3 is articulated to the upper end of the tower 2 and can usually be oriented horizontally, in particular approximately horizontally.
- a counter-boom 4 can be provided, which is also lying, in particular arranged horizontally, and can carry a ballast weight 5.
- a trolley 6 can be arranged to be longitudinally movable on the boom 3 in order to be able to lower and raise the lifting rope 7 and the load hook connected thereto closer to the tower 2 or further away from the tower 2.
- the lifting rope 7 can advantageously be lowered and raised with the aid of a lifting mechanism 16, which can be arranged on the counter jib 4 in the vicinity of the ballast weight 5.
- both the boom 3 and the counterjib 4 can be fastened to a link 8 which can be attached or arranged at the upper end of the tower 2.
- the mentioned articulation piece 8 can sit on the bearing ring of a slewing gear.
- the articulation piece 8 mentioned can be rigidly connected to the tower 2 and / or form its uppermost piece.
- a guy point 9 can also sit, on which the guy wires for the boom 3 and the counter jib 4 can be attached, as will be explained in more detail.
- the boom 3 comprises an inner boom part 3i and an outer boom part 3a which is articulated at the outer end of the inner boom part 3i.
- “inside” and “outside” is the throat or the distance meant by tower 2.
- the inner boom part 3i is closer to the tower 2 than the outer boom part 3a.
- the inner boom part 3i is designed as a bending beam, which is rigidly and rigidly attached to the articulation piece 8, for example by bolting or another form-fitting connection of the upper straps and lower chords of the inner boom part 3i to the articulation piece 8 If the inner jib part 3i is pulled or loaded downwards by the trolley 6 or also by its own weight, the upper belt or belts is subjected to tension and the lower belt or belts to pressure, the bending moment being introduced into the articulation piece 8 or is intercepted by the link 8.
- the inner cantilever part 3i designed as a bending beam can remain free of tension.
- the guying 10 alone can hold the outer boom part 3a or can only be guided to the outer boom part 3a, which is held by the mentioned guying 10.
- both, i.e. the inner and outer cantilever parts 3i and 3a are each designed as truss girders and / or are composed of several cantilever pieces.
- Such a framework construction can consist, in particular, in that upper and lower chords running in the longitudinal direction are rigidly connected to one another by transverse struts and in particular form a rigid framework structure.
- the lower chords can form tracks for the trolley 6.
- the inner and outer boom parts 3i and 3a can be designed differently.
- the inner boom part 3i can have a larger profile cross section and / or have more longitudinal belts than the outer boom part 3a.
- the cantilever pieces of the inner cantilever part 3i because four longitudinal straps and the jib pieces of the outer jib part only have three longitudinal straps, the inner jib part having a rectangular or trapezoidal profile cross section with two top straps and two bottom straps, while the outer boom part has a triangular profile cross section with one top strap and two bottom straps can.
- the guying 10 for the boom 3 can be single-stranded.
- the guying 10 can be guided directly and without intermediate guying supports from the outer boom part 3a to the guying tip 9.
- the guying 10 can also be guided over a guying support 11, which protrudes between the two stop ends of the guying 10 over the top of the boom 3.
- a guying support 11 can be arranged, for example, in the region of the joint 15 between the inner and outer boom parts 3 and can be fastened, for example, to the projecting end 12 of the inner boom part 3 designed as a bending beam.
- the guy support 11 it would also be possible to arrange the guy support 11 further inwards towards the tower 2 or also further outwards on the outer boom part 3a.
- the guy tip 9 provided on the tower 2 can have a lower height, as is shown in partial view B of FIG. 2.
- the guy support 11 and the guy tip 9 can essentially project upwards equally far above the boom 3, so that the guy 10 can run approximately parallel to the longitudinal axis of the boom 3, more precisely, the inner boom part 3i and only lowered from the guy support H outwards at an acute angle to the outer boom part 3a, cf. Figure 2B.
- the guying tip 9 and the articulation piece 8 can advantageously be formed separately from one another and releasably connected to one another.
- the guying tip 9 can be rigidly connected or locked to the articulation piece 8, for example by a bolt connection or a similar form-fitting connection. If the bolts or the connecting means are loosened, the guying tip 9 can be removed and replaced by another guying tip or can be completely eliminated.
- the counter jib 4 can also have an inner counter jib part 4i, which is designed as a bending beam and can be attached to the articulation piece 8 in a manner that is resistant to bending, for example by a rigid connection, such as a bolt connection of the upper and lower belts of the inner counter jib part 4i on said articulation piece 8.
- a rigid connection such as a bolt connection of the upper and lower belts of the inner counter jib part 4i on said articulation piece 8.
- the inner counter jib part 4i can also be designed as a truss with upper and lower chords, cf. Fig. 3.
- An outer counter-jib part 4a can be articulated to said inner counter-jib part 4i and held by a counter-jib guying 13.
- Said counter jib guying 13 can also be single-stranded, but a multi-leg counter jib guying would also be possible.
- the counter-boom guying 13 can be guided from an outer end section of the counter-boom 4 to the guying tip 9, on which the guying 10 for the boom 3 is also attached.
- the counter jib guying 13 can advantageously be guided here via a guy support 14, which is provided, for example, in the region of the joint 15 between the inner and outer counter jib parts 4i and 4a, but here, too, the guy support 14 is positioned further outside or further inside it is possible.
- the guy support 14 can be articulated in particular on the outer end section of the inner counter jib part 4i.
- the above-mentioned guy support 14 can be adapted in its fleas above the counter jib 4 to the fleas of the guy tip 9, in particular in such a way that the counter jib guying 13 is guided approximately horizontally and / or parallel to the longitudinal axis of the inner counter jib part 4i.
- the counter jib guying 13 can also be attached directly to the inner counter jib part 4i, which is designed as a bending beam, in particular to the upper chord of the inner counter jib part 4i or a guying beam connected to it.
- the guying variants for the outer boom part 3a can be used for different variants or extensions. fertilize and / or load capacities of the boom 3 can be selected appropriately.
- the guying 10 can also be dispensed with entirely, and the outer bracket part 3a can be fastened to the inner bracket part 3i in a manner that is resistant to bending, in particular by means of a form-fitting connection of the upper belts.
- the ratio of the lengths of the inner cantilever part 3i and the outer cantilever part 3a can in principle be selected differently, and there are basically favorable conditions if the length of the inner cantilever part is in the range from 25% to 75% or 30% to 60% or 35% to 50% of the total length of the boom and the length of the outer boom part 3a is 75% to 25% or 70% to 40% or 65% to 50% of the total length of the boom 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Jib Cranes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018122349.8A DE102018122349A1 (de) | 2018-09-13 | 2018-09-13 | Kran |
PCT/EP2019/072417 WO2020052931A1 (de) | 2018-09-13 | 2019-08-22 | Kran |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3841054A1 true EP3841054A1 (de) | 2021-06-30 |
Family
ID=67742414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19758698.5A Pending EP3841054A1 (de) | 2018-09-13 | 2019-08-22 | Kran |
Country Status (6)
Country | Link |
---|---|
US (1) | US12012313B2 (de) |
EP (1) | EP3841054A1 (de) |
CN (1) | CN112888652A (de) |
BR (1) | BR112021004510A2 (de) |
DE (1) | DE102018122349A1 (de) |
WO (1) | WO2020052931A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018122349A1 (de) | 2018-09-13 | 2020-03-19 | Liebherr-Werk Biberach Gmbh | Kran |
DE102020129454B4 (de) | 2020-11-09 | 2023-08-17 | Tadano Demag Gmbh | Fahrzeugkran mit einem Auslegersystem |
DE102020134714B4 (de) | 2020-12-22 | 2023-09-28 | Tadano Demag Gmbh | Fahrzeugkran mit einem wippbaren Hauptausleger und mit einem Zusatzauslegersystem |
CN113213347B (zh) * | 2021-05-11 | 2022-07-12 | 平凉市新世纪建筑工程有限责任公司 | 一种建筑用吊装设备及吊装方法 |
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SE394881B (sv) | 1974-09-02 | 1977-07-18 | Linden Alimak Ab | Sett for dempning av svengning hos konstruktioner, exv byggnadskranar samt anordning herfor |
SU1082749A1 (ru) * | 1982-01-21 | 1984-03-30 | Центральное Конструкторское Бюро "Строймаш" Научно-Производственного Объединения "Ленстроймаш" | Башенный кран |
DE3510116A1 (de) * | 1984-04-25 | 1985-10-31 | Liebherr-Werk Biberach Gmbh, 7950 Biberach | Oben drehender turmkran |
BE902258A (fr) * | 1984-04-25 | 1985-08-16 | Liebherr Werk Biberach Gmbh | Grue-tour pivotant en haut. |
SU1654255A1 (ru) | 1988-08-10 | 1991-06-07 | Всесоюзный Государственный Конструкторско-Технологический Институт "Вктистроймеханизация" | Башенный кран |
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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 |
ITMI20031503A1 (it) | 2003-07-22 | 2005-01-23 | San Marco Internat S R L | Gru a torre con braccio e controbraccio senza tiranti di sostegno |
DE102005018522B4 (de) | 2005-04-20 | 2008-09-04 | Burgdorf, Frank, Dipl.-Ing. | Vorrichtung zum Ändern des Gegengewichtsabstandes eines Turmdrehkrans, ohne Ändern des Gegenauslegers |
DE102006032321A1 (de) | 2006-07-11 | 2008-01-17 | Wolffkran Gmbh | Verfahren zur Montage eines Turmkranes |
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CN203820334U (zh) * | 2014-05-04 | 2014-09-10 | 中国建筑科学研究院建筑机械化研究分院 | 塔式起重机空中折转落臂拆臂装置 |
CN104192737A (zh) * | 2014-07-31 | 2014-12-10 | 芜湖合建路桥机械有限公司 | 一种吊臂长度可变的塔式起重机 |
CN204643652U (zh) * | 2015-01-07 | 2015-09-16 | 南宁市桂新泰机械设备制造有限公司 | 一种塔吊式起重机 |
DE102017000525B4 (de) * | 2016-02-10 | 2024-02-29 | Liebherr-Werk Ehingen Gmbh | Gitterstückelement und Gitterstück für Kranausleger |
CN106542444A (zh) * | 2016-11-10 | 2017-03-29 | 四川宇盛智创科技有限公司 | 一种建立在塔身回转的弯矩减少结构 |
DE202017107301U1 (de) | 2017-09-01 | 2018-12-07 | Liebherr-Werk Biberach Gmbh | Turmdrehkran |
CN108190766A (zh) * | 2017-11-17 | 2018-06-22 | 赵保全 | 一种自动平衡塔式起重机 |
DE102018122349A1 (de) | 2018-09-13 | 2020-03-19 | Liebherr-Werk Biberach Gmbh | Kran |
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2018
- 2018-09-13 DE DE102018122349.8A patent/DE102018122349A1/de active Pending
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2019
- 2019-08-22 EP EP19758698.5A patent/EP3841054A1/de active Pending
- 2019-08-22 BR BR112021004510-4A patent/BR112021004510A2/pt unknown
- 2019-08-22 WO PCT/EP2019/072417 patent/WO2020052931A1/de unknown
- 2019-08-22 CN CN201980069195.6A patent/CN112888652A/zh active Pending
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2021
- 2021-03-12 US US17/200,562 patent/US12012313B2/en active Active
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Publication number | Publication date |
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US12012313B2 (en) | 2024-06-18 |
WO2020052931A1 (de) | 2020-03-19 |
US20210221656A1 (en) | 2021-07-22 |
CN112888652A (zh) | 2021-06-01 |
DE102018122349A1 (de) | 2020-03-19 |
BR112021004510A2 (pt) | 2021-06-08 |
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