EP2703332B1 - Mécanisme de levage pour grue - Google Patents

Mécanisme de levage pour grue Download PDF

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Publication number
EP2703332B1
EP2703332B1 EP12182292.8A EP12182292A EP2703332B1 EP 2703332 B1 EP2703332 B1 EP 2703332B1 EP 12182292 A EP12182292 A EP 12182292A EP 2703332 B1 EP2703332 B1 EP 2703332B1
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EP
European Patent Office
Prior art keywords
cable
drum
strands
cable drum
strand
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
EP12182292.8A
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German (de)
English (en)
Other versions
EP2703332A1 (fr
Inventor
Reiner Vemmer
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.)
Scheffer Krantechnik GmbH
Original Assignee
Scheffer Krantechnik 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 Scheffer Krantechnik GmbH filed Critical Scheffer Krantechnik GmbH
Priority to EP12182292.8A priority Critical patent/EP2703332B1/fr
Priority to ES12182292.8T priority patent/ES2552697T3/es
Publication of EP2703332A1 publication Critical patent/EP2703332A1/fr
Application granted granted Critical
Publication of EP2703332B1 publication Critical patent/EP2703332B1/fr
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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
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads

Definitions

  • the present invention relates to a crane hoist, according to the preamble of claim 1.
  • Crane hoists of this kind are used in industry for the load-controlled transport of goods. They comprise one or more cable drives whose cable strands are wound on a common cable drum or on several drive-connected drums. Usually, the ropes run over pulleys down to suspension points on the load-carrying means, ie to a crane hook or a lifting magnet. The ropes are so taut that a lateral deflection of the load is possible only by using greater lateral forces. The thus stabilized load therefore does not oscillate even with lateral movements of the cable drive.
  • the cable strand guide In order to keep the wear of the cable strands as low as possible, the cable strand guide should include as few bending changes. It is therefore desirable to keep the number of pulleys used as low as possible. In some constructions, therefore, at least one of the cable strands is guided directly from the cable drum down to the load receiving means.
  • the European patent EP 0 941 959 B1 shows the European patent EP 0 941 959 B1 a rope drive with three rope strands, which are wound on a common cable drum and whose drainage points form a substantially equilateral triangle. While the outer cable strands are guided over deflection rollers, the middle rope strand runs directly from the cable drum down to the load handling device.
  • the middle rope strand lies in the plane of symmetry of the pyramid, which is spanned by the three cable strands.
  • the lateral slip angle which this cable strand encloses with a plane perpendicular to the cable drum axis, is approximately equal to zero.
  • a winding and unwinding of the middle rope strand is therefore easily possible in this case.
  • the two outer cable strands must be guided over articulated deflection rollers in order to keep the skew angle of the cable drum as small as possible. Without this measure, the Slip angle increase with increasing lifting height so far that proper functioning of the crane lifting gear would no longer be guaranteed.
  • At least one cable strand running down directly from the cable drum and inclined by a skew angle is helically wound onto the cable drum such that the pitch angle of the winding corresponds to its skew angle.
  • This type of winding ensures that the slip angle remains constant over the entire lifting height of the load and does not increase even with a large lifting height. Due to the relatively large pitch or pitch of the windings, the cable is wound with increasing lifting height comparatively far towards the load, i. the windings migrate toward the load, while in the heretofore known winding geometry, the drainage point on the drum remains substantially unchanged, apart from minor emigration movements.
  • the pitch angle ⁇ in this relation (1) according to the invention is equal to the slip angle.
  • the winding of this cable strand is guided in a corresponding helical guide on the jacket of the cable drum.
  • the cable strand is thus not freely wound on the drum shell, but runs in a guide in the manner of a screw thread, so for example in a guide groove, which defines a defined winding path and prevents lateral slippage of the windings.
  • the cable drive comprises at least two such cable strands, which run directly from the cable drum to the load-receiving means and are wound along sections of a common cable drum or two cable drums offset from one another along the drum axis, which are arranged together in drive connection on a common drum axis.
  • These two cable strands are each inclined by a slip angle with respect to the vertical median plane between their two drum sections, wherein the pitch angle of their windings in the manner already described above correspond to their slip angles.
  • the inventive principle of the cable winding is extended to two cable strands, which are wound symmetrically to the vertical median plane which intersects the drum axis, and on either side of this center plane are inclined by the slip angle.
  • the cable drive comprises a third cable strand, which is approximately in the middle plane between the two drum sections of the two wound directly from the cable drum outer cable strands is wound on a central drum section.
  • This third strand of rope runs over a spaced from the drum sections drain roller down to the load receiving means, so that the two outer cable strands and the third strand of rope form the edges of a standing on top of the three-sided pyramid.
  • the load is thus stabilized in an additional direction, so that oscillations can be prevented. Since the third strand of rope lies in the median plane, it may conventionally be tightly wound on the middle section of the barrel since its skew angle is approximately zero.
  • the central drum portion may have a slightly smaller diameter than the two outer drum sections. This serves to compensate for different take-up lengths for windings of different pitch.
  • the cable drive comprises at least two running directly from the cable drum rope strands, which are wound as a pair of cables on a common cable drum section doppelund and diverging from its expiry point on the cable drum to different suspension points on Lifting means run, which are spaced apart transversely to the drum axis, wherein the pitch angle of the double-turn winding corresponds to the skew angles of the cables of the cable pair.
  • the principle of adaptation of the pitch angle is extended to the skew angle of a double-turn winding in the manner of a double-threaded thread.
  • the two ropes of the rope pair can be close together, but the slope must be sized sufficiently large to make the compensation of the slip angle even at higher lifting heights. This means that the individual double turns can have a comparatively large distance from each other.
  • the rope drive comprises two pairs of cables with each running directly from the cable drum and double wound rope strands, along the drum axis offset from each other sections of a common rope drum or two arranged on a common axis and drive-connected cable drums are wound and are arranged mirror-symmetrically with respect to a median plane between the two drum sections.
  • two double-wound cable pairs are thus present, which are arranged symmetrically on both sides of the median plane and can include the same slip angle with her on both sides of this level.
  • Fig. 1 shows a schematically simplified Kranhubwerk 10 with a cable drive 12, which comprises a plurality of cable strands, which converge to a common suspension point L on the load, not shown.
  • the cable drive may comprise additional cable strands, which are not shown in detail, in particular an additional middle rope strand for load stabilization in the transverse direction to the drum axis, as in the following embodiment in the Fig. 2 to 4 is shown in more detail. Based on the embodiment shown here, only the principle of the invention will be explained, which can be applied to various embodiments of cable drives.
  • the two cable strands 14 and 16 shown are wound on a common cable drum 18 which is rotatable about a horizontal drum axis A.
  • Each of the cable strands 14,16 is wound on a portion 20,22 of the cable drum 18 and runs obliquely down to the suspension point L.
  • the cable strands 14,16 run at point L V-shaped together and close to the vertical center plane E, which through the Suspension point L runs and the cable drum axis A intersects vertically, in each case a slip angle ⁇ .
  • the angle enclosed between the two cable strands 14, 16 is therefore twice the skew angle, namely 2 ⁇ .
  • Each of the cable strands 14,16 is wound helically on its cable drum section 20,22, in such a way that the pitch angle of this winding corresponds to the slip angle ⁇ .
  • the individual windings 24 are thus spaced along the cable drum axis A by the pitch or pitch P.
  • the geometry of the cable strands 14,16 shown here stabilizes a load which is suspended at the suspension point L, only against deflection forces acting approximately in the direction of the drum axis A.
  • further cable strands may be present, which are in Fig. 1 not shown, but in the embodiment in the following Fig. 2 . 3 and 4 are shown.
  • the same components are denoted in the following figures with the same reference numerals as in Fig. 1 ,
  • Crane lift 30 in Fig. 2 also includes a cable drum 18 which is rotatable about a horizontal cable drum axis A. At one end of the cable drum 18, a drive 32 is provided.
  • the cable drum 18 comprises two along the axis A staggered cable drum sections 20,22 on which the cable strands 14,16 are wound up as outer cable strands.
  • the type of winding corresponds to that associated with Fig. 1 has been described, ie, the pitch angle ⁇ of the windings 24 correspond to the slip angle ⁇ between the cable strand 14,16 and the vertical center plane E between the two cable drum sections 20,22.
  • Fig. 2 two different lifting positions of the suspension point L are shown. Again, it is visible that the slip angle ⁇ in the lowest stroke position is equal to that in the highest stroke position.
  • a third strand of rope 34 runs on a narrow central drum section 36. It is connected via a non-pivotable deflection roller 38, which in the side view in Fig. 3 is visible, guided down to the suspension point L.
  • This guide roller 38 is located at the same height as the cable drum 18 and is offset laterally relative to this, so that the third cable strand 34 forms an angle with the plane in which the two outer cable strands run 14,16.
  • the middle rope strand 34 always runs approximately in the center plane E, apart from minor lateral emigration movements during the winding and unwinding, which are not important for the function of the crane lifting 30.
  • the cable strand 34 therefore has at most a very small skew angle approximately equal to zero.
  • the middle rope strand 34 is thus wound tightly on its middle barrel section 36 in a conventional manner, the turns being able to lie directly next to one another.
  • the central drum portion 36 has a slightly smaller diameter than the two outer drum sections 20 and 22nd
  • a triangular pyramid whose point is formed by the suspension point L.
  • the windings and also the discharge points of the outer cable strands 14, 16 move along the cable drum axis A toward one another in the direction of the center plane E, so that the pyramid becomes narrower.
  • Fig. 5 shows a not belonging to the invention and known in the prior art embodiment of a Kranhubwerks 40, comprising a cable drive 42 with four strands of cable 44,46,48,50, which run from a common cable drum 18 directly down to a load-receiving means 52.
  • This load receiving means 52 comprises four different suspension points 56,58,60,62, which are arranged on a load carrier 64 spaced apart in a rectangle.
  • the suspension points 60 and 62 of the cable strands 48 and 50 are spaced from one another transversely to the drum axis A, as are the suspension points 56 and 58 at which the cable strands 44 and 46 are spaced apart by the same distance in the transverse direction.
  • the suspension points 56 and 60 on the in Fig. 5 left side of the cable drum 18 are axially spaced by a substantially smaller distance than in the transverse direction, as well as the suspension points 58 and 62 on the opposite right side of the load receiving means 52nd
  • the cable strands 44 and 46 form a pair of cables 66, which is wound on a common cable drum section 20 double-dotted, d. H. the two cable strands 44,46 of the pair of cables 66 are immediately adjacent to each other, but have the same pitch angle in their doppelloomen winding. According to the invention, this pitch angle corresponds to the skew angle of the two cable strands 44, 46 with respect to a vertical center plane E perpendicular to the cable drum axis A.
  • the two cable strands 44 and 46 of the cable pair 66 run from the cable drum 18 diverging to their various suspension points 56 and 58 on the opposite sides of the load receiving means 52. Since these suspension points 56, 58 are spaced apart in the transverse direction, the cable strands 44, 46 close one another Angle ⁇ with each other.
  • the slip angle which includes each of the cable strands 44,46 with the center plane E remains the same over the entire lifting height of the load receiving means 52, since the double winding of the cable pair 66 follows the same laws as the winding of the individual cables 14, 16 in the previous embodiments.
  • the windings thus move relatively far inward on the cable drum section 20 with increasing lifting height, but the slip angle ⁇ is kept constant at a constant angle to the pitch of the winding.
  • the winding of the remaining ropes 48,50 corresponds in mirror image to that of the pair of cables 66.
  • the cable strands 48 and 50 also form a pair of cables 70, which is wound on a cable drum portion 22 which is offset from the first cable drum portion 20 along the cable drum axis A, double-wound the pitch angle of the double-turn winding of the cable pair 70 corresponds to the slip angle of the cable strands 48 and 50 with respect to the median plane E between the cable drum sections 20 and 22.
  • the cable strands 48 and 50 run from the cable drum 18 from divergent down to their suspension points 60 and 62, ie they close an angle ⁇ with each other one.
  • the two pairs of cables 66,70 thus run mirror-symmetrically with respect to the center plane E.
  • the two drum sections 20 and 22 can be arranged here and also in the previously described embodiments on two different cable drums, which lie on a common cable drum axis A and are drivingly connected to each other.
  • helical guides can be arranged in the manner of external threads, in which the individual coiled cable strands 14,16 or pairs of cables 66.70 are performed in the desired manner. In this way, a defined winding can be specified. Additional means such as pinch rollers can additionally hold the cable strands in their guides.
  • the crane 160 in Fig. 6 which is an embodiment not according to the invention, but known in the prior art, comprises two crane lifts, which are arranged at the same height and each comprising a cable drum 18.
  • the two cable drums 18 and 118 have parallel cable drum axes A, A '.
  • the crane hoist 40 corresponds to that Fig. 5 .
  • the other Kranhubwerk 140 is similar to the Kranhubwerk 40 constructed and has an identical cable drive 142, which also includes four cable strands, which like the cable strands 44,46,48,50 in Fig. 5 run.
  • the only difference is that the laterally spaced suspension points 56, 60 and 58, 62, respectively, are disposed on different load carriers 144, 146.
  • the load-carrying means comprises the load carrier 64 of the crane lifting gear 40, the load carriers 144, 146 of the crane lifting gear 140 and an in Fig. 6 not shown connection carrier, which is transverse to the cable drum axes A, A 'and on which the load carrier 64,144,146 are fixedly mounted.
  • the load is pendulum stabilized not only in the longitudinal direction of the cable drum axes A, A ', but also in the transverse direction ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ropes Or Cables (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)

Claims (3)

  1. Unité de levage de grue (10, 30, 40, 140), comportant au moins un entraînement par câble (12, 42, 142) et des moyens de réception de charge (52) suspendus à celui-ci, lequel entraînement par câble (12, 42, 142) inclut plusieurs portions de câble (14, 16, 34 ; 44, 46, 48, 50), à savoir au moins
    - deux portions de câble extérieures (14, 16) qui sont enroulées sur des parties de tambour de câble (20, 22), décalées l'une par rapport à l'autre le long d'un axe de tambour (A), d'un tambour de câble commun (18) ou de deux tambours de câble solidaires en entraînement,
    - et une troisième portion de câble (34) qui est enroulée sensiblement dans un plan médian (E), perpendiculairement à l'axe de tambour (A), entre les deux parties de tambour de câble (20, 22) des deux portions de câble extérieures (14, 16), sur une partie centrale de tambour de câble (36),
    lesquelles trois portions de câble (14, 16, 34 ; 44, 46, 48, 50) s'étendent vers le bas jusqu'aux moyens de réception de charge (52), de telle sorte que les deux portions de câble extérieures (14, 16) et la troisième portion de câble (34) forment les arêtes d'une pyramide à trois faces s'élevant à la pointe,
    caractérisée en ce que les deux portions de câble extérieures (14, 16) s'étendent vers le bas directement à partir du tambour de câble (18) et sont respectivement inclinées d'un angle d'inclinaison oblique (α) par rapport au plan médian (E) et sont enroulées hélicoïdalement sur leurs parties de tambour de câble (20, 22), de telle sorte que l'angle de pente de leurs enroulements correspond à leurs angles de d'inclinaison oblique (α),
    et en ce que la troisième portion de câble (34) s'étend sur un rouleau de dévidement (38) éloigné du tambour de câble (18), vers le bas jusqu'aux moyens de réception de charge (52).
  2. Unité de levage de grue selon la revendication 1, caractérisée en ce que les enroulements des deux portions de câble extérieures (14, 16) sont guidées dans des guides hélicoïdaux correspondants sur l'enveloppe du tambour de câble (18, 118).
  3. Unité de levage de grue selon la revendication 1 ou 2, caractérisée en ce que la partie centrale de tambour de câble (36) a un diamètre sensiblement inférieur aux deux parties de tambour de câble extérieures (20, 22).
EP12182292.8A 2012-08-30 2012-08-30 Mécanisme de levage pour grue Active EP2703332B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12182292.8A EP2703332B1 (fr) 2012-08-30 2012-08-30 Mécanisme de levage pour grue
ES12182292.8T ES2552697T3 (es) 2012-08-30 2012-08-30 Mecanismo elevador de grúa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12182292.8A EP2703332B1 (fr) 2012-08-30 2012-08-30 Mécanisme de levage pour grue

Publications (2)

Publication Number Publication Date
EP2703332A1 EP2703332A1 (fr) 2014-03-05
EP2703332B1 true EP2703332B1 (fr) 2015-08-12

Family

ID=46880956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12182292.8A Active EP2703332B1 (fr) 2012-08-30 2012-08-30 Mécanisme de levage pour grue

Country Status (2)

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EP (1) EP2703332B1 (fr)
ES (1) ES2552697T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016001633U1 (de) * 2016-03-14 2016-06-20 Karl Majer Schwebende Plattform

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US681275A (en) * 1900-06-12 1901-08-27 Standard Seamless Tube Company Crane for pickling-tanks, &c.
DE1908293A1 (de) * 1969-02-19 1970-09-03 Tax Hans Hubseilanordnung
DE2033977C2 (de) * 1970-07-08 1982-12-16 Tax, Hans, 8000 München Mit Pendeldämpfungsvorrichtung versehene Seilaufhängung eines Lastaufnahmemittels
US5423438A (en) * 1993-09-13 1995-06-13 Harnischfeger Corporation Crane with redundant hoist arrangement and method of using same
DE4425777C2 (de) * 1994-07-13 1996-05-30 Mannesmann Ag Hubwerk, insbesondere für Laufkrane, Laufkatzen u. dgl.
DE19732451C2 (de) * 1997-07-23 1999-08-05 Mannesmann Ag Seilanordnung zur Aufhängung eines Anschlagmittels an einem Hubwerk, insbesondere für Laufkrane oder Laufkatzen
EP0941959B1 (fr) 1998-03-13 2004-05-19 Voith-Werke Ing. A. Fritz Voith Gesellschaft m.b.H. & Co. KG. Engin de levage pour grue

Also Published As

Publication number Publication date
ES2552697T3 (es) 2015-12-01
EP2703332A1 (fr) 2014-03-05

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