EP1293471A1 - Flèche télescopique - Google Patents

Flèche télescopique Download PDF

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Publication number
EP1293471A1
EP1293471A1 EP02090290A EP02090290A EP1293471A1 EP 1293471 A1 EP1293471 A1 EP 1293471A1 EP 02090290 A EP02090290 A EP 02090290A EP 02090290 A EP02090290 A EP 02090290A EP 1293471 A1 EP1293471 A1 EP 1293471A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
box
telescopic boom
locking
piston
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
EP02090290A
Other languages
German (de)
English (en)
Other versions
EP1293471B1 (fr
Inventor
Klaus Dipl.-Ing. Conrad
Fery Dipl.-Ing. Jens
Martin Bauer
Rolf Dipl.-Ing. Heintz
Christoph Dipl.-Ing. Passmann
Sascha Dipl.-Ing. Scholz
Mario Rübel
Michael Dipl.-Ing. Dammer
Erik Dipl.-Ing. Appel (FH)
Steffen Holzer
Uwe Dr.-Ing. Seel
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.)
Terex Demag GmbH and Co KG
Original Assignee
Demag Mobile Cranes GmbH and Co KG
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 Demag Mobile Cranes GmbH and Co KG filed Critical Demag Mobile Cranes GmbH and Co KG
Publication of EP1293471A1 publication Critical patent/EP1293471A1/fr
Application granted granted Critical
Publication of EP1293471B1 publication Critical patent/EP1293471B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks

Definitions

  • the invention relates to a telescopic boom, in particular a telescopic boom for a mob crane, with those mentioned in the preamble of claim 1 Features.
  • Telescopic booms with hydraulic telescopic systems have been around for many years known.
  • DE 198 24 672 A1 describes a crane with a telescopic boom described.
  • the telescopic boom has a basic box in which several Inner boxes are essentially coaxially guided.
  • the inner boxes can one by one through a hydraulic cylinder / piston system be extended.
  • the hydraulic cylinder / piston system is one its two axial ends (foot area) fixed in the basic box and with his extendable part by means of a coupling device to the one to be moved Inner box connectable.
  • This coupling device is also used as a backup and Locking unit called.
  • the extendable part of the cylinder / piston system can optionally be in the piston rod or in the hydraulic cylinder.
  • the Inner boxes can each be in their retracted and in their extended positions by an actuatable by the safety and locking unit Bolting device opposite the next larger inner box or (in the case of the outermost inner box) with the basic box of the telescopic boom mechanically locked so that there is no relative displacement against each other is more possible.
  • the Bolting device Immediately before moving an inner box is the Bolting device after coupling the fuse and Locking unit unlockable by the latter.
  • the extension length of the hydraulic In this known solution, the cylinder / piston system corresponds to the axial length of the longest inner box to be moved. In the extended position The length of the hydraulic cylinder / piston system is practically twice as long. There telescopic shots must be partially extended under load particular problem regarding the buckling stiffness of the cylinder / piston system.
  • the lowest possible weight for that Telescopic system is desirable, however, so that e.g. because of the limitation of permissible axle loads of a mobile crane, the highest possible weight proportion for the Telescopic shots of the telescopic boom remain available to one if possible to be able to implement a large extension length.
  • Telescoping the individual inner boxes are different from the telescopic boom according to DE 198 24 672 A1 with this solution not in one step, but in two Partial steps.
  • the lower safety and Locking unit actuated and the respective inner box to about half of it Extending length extended and locked in this intermediate position. Subsequently the cylinder moves back to its starting position. As soon as this is reached the upper locking and locking unit is in a position that approx the position of the lower locking and locking unit at the end of the first Extending step corresponds.
  • the second security and locking unit is like this designed so that they can unlock the bolting device after they are on has coupled the inner box to be extended. In a second stroke it can Move the inner box to be extended into its end position and there again lock.
  • the object of the present invention is to provide a telescopic boom Generic type so that the time for extending and retracting the Inner boxes in their or from their maximum extended position is significantly shortened.
  • the essence of the present invention is that the hydraulic Cylinder / piston system is designed as a two-stage cylinder / piston system, that is has two extendable parts.
  • This cylinder / piston system consists of one Outer cylinder, an inner cylinder and a piston rod.
  • the piston rod is in the Inner cylinder guided, while the inner cylinder is guided in the outer cylinder and thus forming its piston.
  • the inner cylinder and the outer cylinder are hydraulic can be controlled individually, i.e. independently of each other.
  • the outer cylinder and the Piston rod form the two extendable parts of the cylinder / piston system and are each with one of the two security and locking units Mistake.
  • the inner cylinder represents the fixed part of the cylinder / piston system is fixed in the basic box of the telescopic boom.
  • each inner box at least one intermediate extension position between the retracted position and the maximum extended position and from each of the two Securing and locking units for coupling and uncoupling can be approached to the respective inner box from one locking and locking unit to the other to hand over.
  • Each locking and locking unit is therefore only for one part the entire travel distance from the retracted position to the maximum extended position responsible. It can be provided that the inner box to be extended in the Intermediate extension position opposite the next larger inner box or the Basic box is locked during the transfer. Then the handover Securing and locking unit the inner box in the First lock the intermediate extension position, uncouple and move back with it then move to the receiving security and locking unit, connect and can then unlock the inner box into the final one Bring out position. When entering, the operations take place accordingly in reverse order.
  • the transfer of an inner box between the two security and locking units without locking in an intermediate extension position if namely in the intermediate extension position the two locking and locking units together for a short time are coupled to the inner box.
  • the intermediate extension position does not have to be necessarily be a fixed location, but can be a stretch of the entire route Extension path of an inner box. The latter means that the two Securing and locking units during the transfer of the inner box from the one to the other does not stand still, but in the same direction with the same Move speed.
  • the transferring security and locking unit may only disconnect after the receiving party has connected.
  • the solution according to the invention makes it possible to secure both Locking units to move completely independently. This can be guaranteed that one of the two backup and Locking units is coupled to the inner box to be moved and can move this while the other safety and Locking unit performs an idle stroke.
  • the two backup and Locking units give the respective inner box when retracting and extending each next to each other, so that depending on the selected embodiment of the invention at most for the short period of handover, in which the inner box in one If necessary, the intermediate extension position must be locked, the Extending or retracting movement is recorded.
  • the duration of the exit or Retraction movement of a single inner box thus practically corresponds to the value which can be reached by a hydraulic cylinder / piston system
  • the axial Length corresponds to the length of the largest inner box, as is the case with the Telescopic boom according to DE 198 24 672 A1 is the case.
  • the present invention enables one corresponding weight saving while ensuring an almost unchanged short extension or retraction times.
  • the proposed extension lengths of the two extendable parts of the cylinder / piston system may be different. It is recommended to do this extendable length to about 40% - 60% of the maximum extension length of the one To determine the inner box with the greatest extension length.
  • the Cylinder / piston system with its inner cylinder over a pressure frame i.e. one suitable for the transmission of pressure forces in particular To fix the foot area of the basic box.
  • the piston rod at its free end has one of the two security and locking units, is here below from their retracted position to the foot of the base box extendable.
  • the outer cylinder, which is on its for the Inner cylinder open end with the second locking and locking unit is provided, relative to the inner cylinder towards the head of the Telescopic boom, so seen in the working position can be extended upwards. at this solution is only the relative to fix the cylinder / piston system short printing frame needed, which is preferably about half the axial length an inner box extends.
  • This solution variant has the particular advantage that the first partial stroke the extension movement, which is only about half the power required for the Completion of the second partial stroke requires, with the effective piston area of the Piston rod can be executed, which are thus designed to be significantly smaller can be used as the effective piston area of the outer cylinder. This fact contributes a further weight reduction.
  • the cylinder / piston system fixed with its inner cylinder directly in the foot area of the basic box is. So there is no need for a pressure frame construction.
  • the outer cylinder is out its retracted position towards the head of the telescopic boom extendable and carries one of the two security and locking units. This can be arranged on the side facing the head of the telescopic boom.
  • the piston rod which is actuated by the cylinder space of the inner cylinder, is at this solution sliding and sealed by both axial ends of the Passed through and is towards the head of the Telescopic boom extendable.
  • a pull frame arranged, which extends in the direction of the foot region of the base box and at its free, lower end with the second fuse and Locking unit is provided.
  • the length of this pull frame corresponds here about the extension length of the longest inner box.
  • the second solution variant of the invention can also be modified in this way be that the one locking and locking unit at the bottom of the Outside cylinder is arranged.
  • the length of the pull frame can be used for the second locking and locking unit, which is connected to the piston rod is approximately halved, which corresponds to approximately half the maximum extension length of the inner box with the greatest extension length.
  • the cylinder / piston system with its inner cylinder via a pressure frame is fixed in the foot area of the basic box.
  • the direction of extension of the extendable parts of the cylinder / piston system are, however, compared to the arrangement according to vice versa of the first variant. Therefore, the print frame for attaching the Inner cylinder not (in relation to the working position of the telescopic boom) on attached lower end of the inner cylinder, but at its upper end where the end open for the piston rod. This extends the required length for the print frame corresponding to practically the entire Extension length of a basic box.
  • the piston rod is here in upwards Extendable towards the head of the telescopic boom.
  • the free end of the Piston rod is coupled to a pull frame which extends in the direction of the Extends foot area of the base box and at its lower (free) end one the two security and locking units are attached.
  • the second The locking and locking unit is located at the lower (free) end of the outer cylinder extendable down to the foot area of the basic box.
  • the forces to be applied are during the extension movement of an inner box considerably higher than with a run-in movement. Therefore, in the first variant the Invention the piston rod is only loaded by tensile forces during the extension movement, which are immaterial in terms of buckling stiffness. The one with the entry movement occurring compressive forces that are decisive for the buckling stiffness advantageously significantly less. In contrast, the second variant the piston rod during the extension movement due to the comparatively higher Pressure forces loaded. Therefore, a correspondingly more massive version of the Piston rod are provided which lead to corresponding losses in the aimed at saving weight.
  • FIG. 1 shows a cylinder / piston system in three different extended positions 10, which has a stationary inner cylinder 12, an outer cylinder 11 and has a piston rod 13.
  • the inner cylinder 12 is via a printing frame 14 by means of a fastening 17 in the basic box of a not shown Telescopic boom fixable.
  • the piston rod 13 is out of the inner cylinder 12 down to the base of the base box, i.e. close to the fastening 17 movable.
  • a lower fuse and Locking unit 9 arranged at the free end of the piston rod 13 a lower fuse and Locking unit 9 arranged.
  • the inner cylinder 12 represents the piston for the Outer cylinder 11 represents the pressure chambers of the inner cylinder 12 and the outer cylinder 11 can be individually controlled by hydraulic feed and discharge lines, not shown, so that the piston rod 13 and the outer cylinder 11 relative to the inner cylinder 12 can be moved independently of one another.
  • Seen telescopic boom is another security and locking unit on arranged lower end of the outer cylinder 11.
  • the middle representation in FIG. 1 shows the retracted position of the piston rod 13 and the outer cylinder 11. In In the illustration above, only the piston rod is fully extended. In the The lower cylinder also shows the maximum extension position reached.
  • the operation of the piston-cylinder system 10 is best shown in the Illustrations in Fig. 2 explained.
  • the cylinder / piston system 10 is in a telescopic boom 1 shown installed, the basic box 2 and a total of four telescopic Inner boxes 3 - 6, the sliding and substantially coaxial with each other or in Basic box 2 are guided.
  • the innermost inner box 6 has at its free end a head 16 equipped with rope pulleys.
  • the basic box 2 is on its underside provided with a bearing 19 for articulating a rocker cylinder, not shown, with the help of the telescopic boom 1 about a horizontal axis of a pivot bearing 20 can be brought into the respective angular position for the desired working position.
  • the foot region of the hydraulic cylinder / piston system designated by reference numeral 7 10, i.e.
  • FIG. 2 shows the Telescopic boom 1 in the fully retracted position while the others Representations of different stages of the extension of individual inner boxes play.
  • the head 16 of the Telescopic boom 1 carries, to be able to extend, the lower safety and Locking unit 9 into the area of the lower end of the inner box 6 be moved.
  • an intermediate locking of the inner box 6 be disregarded if ensured by control measures is that the decoupling of the locking and locking unit 9 only then is possible if the upper securing and locking unit 8 on the respective Inner box is coupled and holds it securely.
  • Extending the inner box 6 through the outer cylinder 11 drives the piston rod 13 with the lower locking and locking unit 9 in a suitable position for coupling the next larger inner box 5, as also from the middle representation of Figure 2 emerges.
  • the inner box 5 of the Security and locking unit 9 gripped, unlocked and in the Intermediate position is moved according to the fourth representation in Fig. 2, couples the upper locking and locking unit 8 after using the inner box 6 has locked the inner box 5, and moves back to its starting position.
  • FIG. 3 is a cylinder / piston system 10 for actuating a telescopic boom reproduced according to the second variant of the invention.
  • the inner cylinder is 12 directly over the attachment 17 with the foot area of one not closer basic box of a telescopic boom shown.
  • the outer cylinder 11, the upper securing and locking unit 8 at its upper end can be extended towards the head of the telescopic boom to the left.
  • the Piston rod 13, which is actuated via the inner cylinder 12, is axial through both Sealed ends of the outer cylinder 11 and slidably passed.
  • the lower one The securing and locking unit 9 is at the free end of a pull frame 18th arranged to the left, also towards the head of the Telescopic boom extendable end of the piston rod 13 is coupled and over extends almost the entire extension length of a telescopic shot. It can be seen that even with this solution, the respective inner box is gripped by one of the two securing and locking units 8, 9, the subsequent method over a partial route and the subsequent transfer to the other security and Locking unit 8, 9 can take place, the second part of the extension or Entry movement accomplished.
  • Fig. 4 the various extended positions are one with one Cylinder / piston system 10 according to FIG. 3 equipped telescopic boom 1 shown how this in a corresponding manner in Fig. 2 for the Cylinder / piston system 10 according to FIG. 1 is the case.
  • the procedure of Inner boxes 2 - 6 by means of the two securing and locking units 8, 9 takes place here in the same way, so that the explanations for FIG. 2 can be referred.
  • the two Security and locking units 8, 9 because of that in Fig. 3 opposite Fig. 1 modified structure of the cylinder / piston system 10 in a different way the moving elements (outer cylinder 11 and piston rod 13) are coupled.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Actuator (AREA)
EP02090290A 2001-08-29 2002-08-15 Flèche télescopique Expired - Lifetime EP1293471B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10142847 2001-08-29
DE10142847A DE10142847C1 (de) 2001-08-29 2001-08-29 Teleskopausleger

Publications (2)

Publication Number Publication Date
EP1293471A1 true EP1293471A1 (fr) 2003-03-19
EP1293471B1 EP1293471B1 (fr) 2005-05-25

Family

ID=7697365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02090290A Expired - Lifetime EP1293471B1 (fr) 2001-08-29 2002-08-15 Flèche télescopique

Country Status (3)

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EP (1) EP1293471B1 (fr)
AT (1) ATE296257T1 (fr)
DE (2) DE10142847C1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008016604U1 (de) 2008-12-15 2009-03-19 Terex Demag Gmbh Teleskopausleger
DE102009006292B4 (de) 2009-01-27 2015-03-26 Manitowoc Crane Group France Sas Verriegelungssystem für Teleskopkranausleger mit verschiebbarer Verriegelungseinheit
ES2459719T3 (es) 2010-12-17 2014-05-12 Manitowoc Crane Group France Sas Sistema telescópico para pluma de grúa y pluma adicional
DE102013011173B4 (de) * 2013-07-04 2019-05-23 Liebherr-Werk Ehingen Gmbh Verfahren zur Montage eines Krans sowie Anlenkschuss, Teleskopausleger und Kran
CN109532356B (zh) * 2018-12-11 2024-02-23 科星汽车设备（珠海）有限公司 具有新型升降结构的拆胎机
CN112938790B (zh) * 2021-01-27 2023-06-13 江苏正峰液压科技有限公司 用于起重机伸缩臂的液压驱动装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060221A (en) * 1976-02-03 1977-11-29 Hiab-Foco Aktiebolag Double-acting hydraulic cylinder having two pistons arranged for coaxial movement relative thereto
DE2647734B1 (de) * 1976-10-22 1978-03-30 Schleicher Gmbh & Co Hermann Vorrichtung zum periodischen Laengsbewegen von stangen- oder bandfoermigen Werkstuecken
DE19824671A1 (de) * 1997-05-28 1998-12-03 Mannesmann Ag Kran mit einem Teleskopausleger
EP1072554A1 (fr) * 1999-07-30 2001-01-31 Liebherr-Werk Ehingen GmbH Grue à flèche téléscopique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060221A (en) * 1976-02-03 1977-11-29 Hiab-Foco Aktiebolag Double-acting hydraulic cylinder having two pistons arranged for coaxial movement relative thereto
DE2647734B1 (de) * 1976-10-22 1978-03-30 Schleicher Gmbh & Co Hermann Vorrichtung zum periodischen Laengsbewegen von stangen- oder bandfoermigen Werkstuecken
DE19824671A1 (de) * 1997-05-28 1998-12-03 Mannesmann Ag Kran mit einem Teleskopausleger
DE19824672A1 (de) * 1997-05-28 1998-12-03 Mannesmann Ag Kran mit einem Teleskopausleger
EP1072554A1 (fr) * 1999-07-30 2001-01-31 Liebherr-Werk Ehingen GmbH Grue à flèche téléscopique

Also Published As

Publication number Publication date
EP1293471B1 (fr) 2005-05-25
DE10142847C1 (de) 2002-11-21
ATE296257T1 (de) 2005-06-15
DE50203183D1 (de) 2005-06-30

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