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EP4091980A1 - Système et procédé de levage pour une grue - Google Patents

Système et procédé de levage pour une grue Download PDF

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Publication number
EP4091980A1
EP4091980A1 EP22171744.0A EP22171744A EP4091980A1 EP 4091980 A1 EP4091980 A1 EP 4091980A1 EP 22171744 A EP22171744 A EP 22171744A EP 4091980 A1 EP4091980 A1 EP 4091980A1
Authority
EP
European Patent Office
Prior art keywords
hook block
crane
winch
auxiliary
pretensioning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22171744.0A
Other languages
German (de)
English (en)
Other versions
EP4091980B1 (fr
Inventor
Ulrich Wiedemann
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
Application filed by Liebherr Werk Ehingen GmbH filed Critical Liebherr Werk Ehingen GmbH
Publication of EP4091980A1 publication Critical patent/EP4091980A1/fr
Application granted granted Critical
Publication of EP4091980B1 publication Critical patent/EP4091980B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • 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
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/34—Crane hooks
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B66D3/26—Other details, e.g. housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0321—Travelling cranes
    • B66C2700/0357—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks
    • B66C2700/0364—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks with a slewing arm
    • B66C2700/0371—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks with a slewing arm on a turntable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/01—Winches, capstans or pivots
    • B66D2700/0108—Winches, capstans or pivots with devices for paying out or automatically tightening the cable

Definitions

  • the present invention relates to a hoisting system for a crane, in particular a mobile or crawler crane, for generating a hoist rope pretension during a hoist of a suspension element of the crane, a crane with such a hoisting system, a pretensioning hook block and a method for lifting a suspension element of a crane using a such lifting system.
  • load-bearing means usually hook blocks with load hooks
  • hoist ropes which are guided on a crane boom via deflection means and stored on hoist winches so that they can be wound up and unwound.
  • the hoisting ropes are usually stored in multiple layers on the hoisting winches.
  • the hoisting ropes on the hoisting winches must be wound as tightly as possible in the lower layers.
  • the hoisting rope is largely unwound when the load is picked up on the ground and is wound up on the hoisting winch during the hoisting process.
  • the load generates the necessary pre-tension on the coiled-up hoist rope so that it is coiled up sufficiently tightly on the hoist winch.
  • the hook block weight is currently increased in the simplest case, for example by using a larger load hook and/or with additional weights.
  • the reeving of the bottom hook block can be selected to be as small as possible and parallel operation with two winches can be avoided.
  • the present invention is therefore based on the object of ensuring good winding quality when winding the hoist rope onto the hoist winch of a crane, without the need for additional auxiliary vehicles or the need to place a weight at a great height.
  • a hoisting system for a crane in particular a mobile or crawler crane, is proposed for generating a hoisting cable pretension during a hoisting of a suspension element of the crane.
  • the lifting system comprises a divisible pretensioning hook block and an associated auxiliary rope, which is mounted so that it can be wound up and unwound on an auxiliary winch arranged or mountable on the crane and guided over a deflection device arranged or mountable on a boom of the crane. By winding and unwinding the auxiliary rope, the pretensioning hook block can be raised and lowered relative to the deflection device.
  • the pretensioning hook block comprises two hook block parts that can be releasably locked or fixed with one another and are connected to one another via the auxiliary rope, of which an upper hook block part has a fastening means for fastening to the suspension means of the crane and a lower hook block part has a receiving means for fastening or receiving a weight.
  • the upper hook block part is connected to the suspension means, it can be raised and lowered together with it.
  • the lower hook block part is connected to a weight in order to use this additional weight to exert a pretensioning force on the hoist rope of the crane, which carries the suspension element, and thereby ensure good winding quality on the corresponding hoist winch.
  • the two hook block parts can be moved independently of one another and the weight connected to the lower hook block part does not have to be lifted together with the suspension element when it is lifted.
  • Skillful control or regulation of the auxiliary winch allows the position or movement of the weight connected to the lower hook block part to be controlled precisely and safely, for example via a crane control system for the crane.
  • the two hook block parts are connected to one another via the auxiliary rope, they can be moved apart or brought together by appropriate control of the auxiliary winch. For example, after the suspension element has been raised to a desired height, the weight connected to the lower hook block part can be set down again on the ground and released from the lower hook block part by appropriate control of the auxiliary winch, so that the latter can then be raised again by winding up the auxiliary rope and connected to the upper hook block part can be merged and locked if necessary. Since the prestressing hook block "hangs" on the separate auxiliary rope, the prestressing hook block can be detached from the suspension means in the raised position, so that the latter is available for receiving a part that is to be dismantled.
  • the lifting system according to the invention thus makes it possible, by using an additional weight when lifting the "empty" suspension means, to exert a pretensioning force on the lifting cable and thus to guarantee good winding quality, with no external auxiliary devices or vehicles having to be used apart from the weight.
  • the weight that generates the pretensioning force does not have to be placed in an elevated position, but can remain in the area of the floor. This provides a flexible and easy-to-use system that can be used in dismantling operations to ensure good hoist rope winding quality and includes few additional parts to carry.
  • the load can be kept close to the ground. This is an improvement in security aspects. In the area under one A suspended load is always a hazard and the area should be avoided by people.
  • auxiliary winch or hoist winch is wound up or unwound or wound up or unwound
  • this is intended to express in abbreviated form that the corresponding auxiliary rope or hoist rope is wound up or unwound onto or from the winch or .wound up or unwound.
  • the feature that the upper and lower hook block parts are connected to one another via the auxiliary rope is to be interpreted broadly and to be understood in such a way that the auxiliary rope runs between these two hook block parts.
  • the two hook block parts are movable in particular with respect to one another.
  • At least a first deflection pulley is arranged on the upper hook block part and a second deflection pulley is arranged on the lower hook block part, over which the auxiliary rope is guided.
  • the pretensioning hook block has at least two reeving points for the auxiliary rope.
  • the reeving of the auxiliary rope can be designed in such a way that its end is attached to the lower part of the hook block. Together with a deflection pulley provided on the deflection device, this results in a total of three strands in the simplest case, in which the lower and upper hook block part each have exactly one deflection pulley, with the first strand of the auxiliary rope between the deflection device and the lower hook block part, the second strand between the lower hook block part and upper hook block part and the third strand runs from the upper hook block part for attachment to the lower hook block part.
  • the mass of the attached weight is distributed proportionally to the different strands of the pulley. In the case of three strands, two strands contribute to increasing the pretension, so that approx. 2/3 of the weight hangs on the lifting gear and tensions the hoist rope, which is wound onto the hoist winch.
  • the pretensioning hook block has at least one deflection pulley for guiding the auxiliary rope laterally past the suspension means, which is preferably arranged on the upper hook block part.
  • this additional deflection pulley is not used for reeving the auxiliary rope to distribute the weight of the additional weight, but only for guiding the auxiliary rope past.
  • one of the deflection rollers of the block and tackle is used at the same time for guiding past.
  • the pretensioning hook block comprises a guide mechanism, by means of which the lower and upper hook block parts can be brought into a defined locking position when they are brought together.
  • the guide mechanism can be used for the precise alignment of the upper and lower hook block parts and/or enable easier insertion of the two hook block parts into one another.
  • the guide mechanism includes one or more guide rails.
  • the guiding mechanism may comprise a tongue and groove mechanism, the groove being able to be attached to the lower hook block and the tongue to be attached to the upper hook block.
  • the reverse case is also possible.
  • the guide mechanism is preferably designed in such a way that the hook block parts are brought together automatically in a raised position, without manual assistance having to be provided.
  • the lower and upper hook block parts have connecting means for releasable locking with one another.
  • the connecting means preferably enable the lower and upper hook block parts to be bolted together by means of one or more bolts.
  • the lower and upper hook block parts can be locked by means of an actuatable locking mechanism, the locking mechanism preferably being able to be actuated actively or passively when or after the upper and lower hook block parts are brought together.
  • Active actuation can take place, for example, by means of electrically or hydraulically controlled locking bolts.
  • passive actuation of the locking mechanism is preferred, triggered in particular when the upper and lower hook block parts are brought together.
  • the pretensioning hook block can have a simple design.
  • the locking mechanism is designed to lock automatically when the lower and upper hook block parts are brought together and preferably comprises a spring element and/or a snap mechanism.
  • the snap mechanism can, for example, comprise a pivotable hook element, which is arranged on the upper or lower hook block part in such a way that when the hook block part is brought together, the respective other hook block part pivots the hook element and the latter moves into a locking position of the upper and lower by a spring mechanism Hook element snaps back and grips a bolt on the other hook block part in such a way that the two hook block parts are locked together.
  • the hook element and bolt other elements can be used, for example a sliding bolt.
  • a hoisting winch is also provided, on which a hoisting rope connected to the suspension means can be wound up and unwound, the hoisting winch and the auxiliary winch preferably being actuatable independently of one another and thus the suspension means and the pretensioning hook block being able to be lifted independently of one another.
  • the hoist winch and the auxiliary winch can preferably be actuated by a crane control.
  • a crane controller is also provided, which is set up to control the hoist winch and the auxiliary winch in a synchronized manner in such a way that during a lift of the suspension element, by winding up the hoist winch and simultaneously unwinding the auxiliary winch, a weight attached to the unlocked pretensioning hook block is at a certain height held floating above the ground.
  • the height and/or orientation of the weight can be detected by appropriate sensors and the measured values can be included in the control.
  • the entire pretensioning process can thus advantageously be carried out and monitored by the crane controller.
  • the pretensioning process can therefore correspond to regular crane operation, for example monitored two-hook operation, with a hook on the suspension element as the main hoist, actuated by the hoist winch, and a hook on the leader hook block actuated by the auxiliary winch with a common load.
  • the present invention also relates to a crane, in particular a mobile or crawler crane, which includes the lifting system according to the invention.
  • Both the hoist winch and the auxiliary winch are preferably attached to an upper carriage of the crane and can be actuated independently via a crane control.
  • the suspension means can be a hook block of the crane.
  • the deflection device can be a mast nose or folding jib that can be mounted on the boom tip, which preferably has at least one deflection pulley over which the auxiliary rope is guided.
  • the present invention further relates to a pretensioning hook block of the lifting system according to the invention.
  • the pretensioning hook block includes an auxiliary rope fastening means for fastening the auxiliary rope of the lifting system, which is preferably arranged on the lower hook block part.
  • auxiliary rope fastening means for fastening the auxiliary rope of the lifting system, which is preferably arranged on the lower hook block part.
  • the first three steps can be performed in any order.
  • the lower hook block part is lifted by winding up the auxiliary winch and brought together with the upper hook block part, so that the hook block parts can be locked together, with the locked pretensioning hook block then preferably being released from the suspension element and set down on the ground by unwinding the auxiliary winch.
  • the suspension element can now be connected to a part to be dismantled at a great height, for example, and the part can be lowered to the ground. The procedure can then be repeated so that there is sufficient pre-tensioning force for the hoist rope with each lift of the "empty" suspension element.
  • Accessibility for detaching the pretensioning hook block from the suspension element can be taken for granted, since the load to be dismantled must be attached to the suspension element in the next step.
  • the hoisting winch and the auxiliary winch are synchronously or are controlled synchronously, in particular via a crane control of the crane, that the weight is kept at a certain height, in particular floating above the ground, by winding up the hoist winch and simultaneously unwinding the auxiliary winch.
  • the lifting of the support means takes place in a two-hook operation monitored by the crane controller, with the hoist and auxiliary winches preferably being automatically regulated by the crane controller in such a way that the weight is in a defined height above the ground and/or in a certain position.
  • the figure 1 shows a schematic side view of the pretensioning hook block 10 of the lifting system according to the invention according to a preferred embodiment.
  • the pretensioning hook block 10 is suspended from a carrying means 6 of a crane 1, the exemplary embodiments shown here being a crawler crane 1.
  • the crane 1, which in a lateral overall view in the Figures 8-11 shown, comprises an undercarriage 8 with a crawler chassis, an uppercarriage 3 mounted on the undercarriage 8 so that it can rotate about a vertical axis, a boom 2 that is articulated on the uppercarriage 3 so that it can pivot about a horizontal axis, and a carrying element 6 for lifting loads, which is Embodiments shown here is designed as a roller block 6a with a load hook 6b.
  • the superstructure 3 of the crane 1 is isolated in a side view in FIG figure 7 shown.
  • the hoist rope 4 is connected to the suspension means 6, so that the support means 6 can be raised and lowered by actuating the hoist winch 5 or by winding and unwinding the hoist cable 4 .
  • the crane 1 also has an auxiliary winch 14 on which an auxiliary cable 12 is mounted so that it can be wound up and unwound. Like in the figure 8 can be seen, the auxiliary winch 14 is located in the lower area of the boom 2.
  • the hoist rope 4 is guided over a deflection pulley of a pulley head on the boom tip to the hoist winch 5 .
  • a deflection device 16 designed as a mast nose is mounted on the boom tip and has a deflection pulley over which the auxiliary cable 12 is guided.
  • FIG. 1-3 shows the pretensioning hook block 10 according to the invention in a locked state ( 1 ) or in an unlocked state ( Figures 1-2 ) demonstrate.
  • the figure 5 shows additional side and front views of the prestressing hook block 10.
  • the pretensioning hook block 10 is constructed in two parts and comprises an upper hook block part 20 (upper block) and a lower hook block part 22 (lower block).
  • the two hook block parts 20, 22 can be locked together so that the prestressing hook block 10 can be moved or lifted as a whole (see 1 ).
  • the locking can take place by means of one or more bolts 30 .
  • the upper hook block part 20 has a first deflection roller 24
  • the lower hook block part 22 has a second deflection roller 26 .
  • the guided over the mast nose 16 auxiliary cable 12 is outgoing guided or reeved from the nose of the mast 16 over the second deflection roller 26 of the lower hook block part 22 and then over the first deflection roller 24 of the upper hook block part 20 and connected to the lower hook block part 22 via a fastening means 29 .
  • the upper hook block part 20 has a further deflection roller 28 in order to guide the auxiliary rope 12 laterally past the suspension means 6 .
  • the two hook block parts 20, 22 are connected to one another via the auxiliary cable 12 in such a way that the distance between the two hook block parts 20, 22 from one another can be changed by suitably controlling the auxiliary winch 14.
  • a sufficiently high pretension can be generated on the hoisting rope 4 when lifting the suspension element 6, so that it is wound up tightly onto the hoisting winch 5. This prevents the occurrence of cutting and ensures good winding quality.
  • a weight 40 is attached to the receiving means 23 of the lower hook block part 22 of the pretensioning hook block 10 attached to the suspension means 6, as shown in Fig figure 2 is shown.
  • the weight 40 is connected to the suspension means 6 and thus to the hoist rope 4 via the prestressing hook block 10 and generates a suitable prestressing force.
  • the block and tackle of the pretensioning hook block 10 realized by the deflection rollers 24, 26 and the fastening means 29 causes the weight force of the weight 40 fastened to the receiving means 23 to be divided between the different strands of the auxiliary rope 12. Since the reeving of the auxiliary rope 12 of the prestressing hook block 10 is selected with three reevings, with the first line leading to the mast nose 16, two lines contribute to increasing the pretension, i.e. approx. 2/3 of the ballast weight 40 hangs on the suspension element 6 and tensions it Hoist rope 4, which is wound onto the hoist winch 5. Of course, more than three reevings of the auxiliary rope 12 or more than one deflection roller 24, 26 can be provided on the hook block parts 20, 22.
  • the two deflection rollers 24, 26 have parallel axes of rotation.
  • the fastening means 29 is located above the second deflection roller 26 on the lower hook block part 22, while the receiving means 23 is arranged below the second deflection roller 26.
  • the other deflection roller 28 is located diagonally above the first deflection roller 24 on the upper hook block part 20, while the fastening means 21 is arranged above the first deflection roller 24.
  • the distance between the first deflection pulley 24 and the further deflection pulley 28 can essentially correspond to the distance between the corresponding deflection pulleys for the hoist rope 4 and the auxiliary rope 12 at the boom head and at the mast nose 16, respectively.
  • the two hook block parts 20, 22 can be pushed into one another, with the upper hook block part 20 being pushed with a receiving area 34 designed as a spring into a receiving area of the lower hook block part 22 designed as a groove 32.
  • the receiving areas 32, 34 can be bevelled, which makes threading or pushing in easier.
  • the two hook block parts 20, 22 can be locked manually using bolts 30 (see also figure 5 ).
  • FIG 6 an alternative embodiment is shown in sketch form, in which the pretensioning hook block 10 has a locking mechanism. Accordingly, a retaining bolt 38 is arranged in the upper area of the lower hook block part 22 , while a pivotable hook element 36 is located in the lower area of the upper hook block part 20 .
  • the pin 38 automatically pushes the hook 36 aside and pivots it about its pivot axis, as shown.
  • the hook block parts 20, 22 reach their fully retracted locking position, the hook 36 snaps in and automatically locks the two hook block parts 20, 22.
  • a spring element not shown in detail, can be provided for this purpose, which forces the hook 36 into its locking position.
  • the hook block parts 20, 22 do not have to be locked manually, which facilitates merging, especially at great heights.
  • the Figures 8-11 show a lateral overall view of the crane 1 during a lift of the support means 6 according to an exemplary embodiment of the method according to the invention. This is based on the situation that a load is to be picked up from an elevated position and set down on the floor 9 for dismantling.
  • the previously lowered suspension element 6 is connected to a weight 40 via the pretensioning hook block 10 according to the invention.
  • the pretensioning hook block 10 is attached to the load hook 6b in the locked state.
  • the weight 40 is attached to the receiving means 23 of the pretensioning hook block 10 .
  • the prestressing hook block 10 can either already be connected to the auxiliary rope 12 when it is attached to the load hook 6b or, for example during the first lift, the auxiliary rope 12 is reeved into the prestressing hook block 10 after it has been attached.
  • the prestressing hook block 10 is unlocked or bolted apart and the weight 40 is slightly raised by operating the hoist winch 5 and the auxiliary winch 14 (see 8 ).
  • the weight 40 can lift off the ground.
  • the weight 40 can be kept floating close to the ground 9 during the lifting of the support means 6. As long as the weight 40 is in the floating state, its weight applies a high pretension to the hoist rope 4 or the hoist winch 5 .
  • the auxiliary winch 14 is unwound, the lower hook block part 22 of the pretensioning hook block 10 is lowered and the weight 40 is placed on the floor 9 and unhooked.
  • the lower hook block part 22 is then pulled up by winding up the auxiliary winch 14 and brought up to the upper hook block part 20 .
  • the hook block parts 20, 22 are in their locked position, they can be bolted together (or automatic locking will take place as discussed above). This can be done from the elevated position, where the load to be transported or set down must also be picked up.
  • the figure 10 shows the situation after the hook block parts 20, 22 have been brought together and locked, while the pretensioning hook block 10 is still attached to the suspension element 6.
  • the pretensioning hook block 10 can now be detached from the suspension means 6 of the crane 1 (see 11 ) and then lowered to the ground 9 by means of the auxiliary winch 14.
  • the carrying means 6 is still in the elevated position and can now be connected to the load to be transported.
  • the load can be set down on the floor 9 by operating the hoist winch 5 .
  • the steps explained above can be carried out again for the next lift of the suspension element 6 .
  • An advantage of this method is the weight 40 lifted from the ground 9, which means that the entire pretensioning process can be monitored by the control of the crane 1.
  • the prestressing process corresponds to regular crane operation. In this case, it is a monitored two-hook operation with a hook 6b on the main or hoist winch 5 as the main hoist and a hook 23 on the auxiliary winch 14 via the mast nose 16 with a common load.
  • auxiliary winch 14 for the auxiliary hoist and the short mast nose 16 are standard equipment on many lattice boom cranes and also on large telescopic cranes. During the prestressing process, the crane 1 can also be rotated and/or moved, which is not possible with a solution using an auxiliary vehicle and/or an auxiliary winch parked on the ground.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
EP22171744.0A 2021-05-21 2022-05-05 Système et procédé de levage pour une grue Active EP4091980B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021113314.9A DE102021113314B4 (de) 2021-05-21 2021-05-21 Hubsystem und -verfahren für einen Kran

Publications (2)

Publication Number Publication Date
EP4091980A1 true EP4091980A1 (fr) 2022-11-23
EP4091980B1 EP4091980B1 (fr) 2024-02-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22171744.0A Active EP4091980B1 (fr) 2021-05-21 2022-05-05 Système et procédé de levage pour une grue

Country Status (5)

Country Link
US (2) US20220371862A1 (fr)
EP (1) EP4091980B1 (fr)
JP (1) JP2022179440A (fr)
DE (1) DE102021113314B4 (fr)
DK (1) DK4091980T3 (fr)

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CN119911793A (zh) * 2025-02-26 2025-05-02 华能澜沧江水电股份有限公司 吊具及起重机

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DE102021124757A1 (de) * 2021-09-24 2023-03-30 Liebherr-Werk Biberach Gmbh Kran
CN116281626A (zh) * 2023-03-22 2023-06-23 中国长江电力股份有限公司 一种吊高距离自动监测报警装置及使用方法
US20250276874A1 (en) * 2024-03-01 2025-09-04 Palfinger Ag Load Block, Crane, Controller for a crane and method to operate a crane

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US20260015211A1 (en) 2026-01-15
DK4091980T3 (da) 2024-03-11
US20220371862A1 (en) 2022-11-24
DE102021113314A1 (de) 2022-11-24
JP2022179440A (ja) 2022-12-02

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