EP1512660B1 - Kran mit Laufkatze - Google Patents

Kran mit Laufkatze Download PDF

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Publication number
EP1512660B1
EP1512660B1 EP04010691A EP04010691A EP1512660B1 EP 1512660 B1 EP1512660 B1 EP 1512660B1 EP 04010691 A EP04010691 A EP 04010691A EP 04010691 A EP04010691 A EP 04010691A EP 1512660 B1 EP1512660 B1 EP 1512660B1
Authority
EP
European Patent Office
Prior art keywords
jib
trolley
crane
running wheel
feeler
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.)
Expired - Lifetime
Application number
EP04010691A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1512660A1 (de
Inventor
Horst Dipl.-Ing. Zerza (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Biberach GmbH
Original Assignee
Liebherr Werk Biberach GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liebherr Werk Biberach GmbH filed Critical Liebherr Werk Biberach GmbH
Publication of EP1512660A1 publication Critical patent/EP1512660A1/de
Application granted granted Critical
Publication of EP1512660B1 publication Critical patent/EP1512660B1/de
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
    • B66C7/00—Runways, tracks or trackways for trolleys or cranes
    • B66C7/12—Devices for changing direction of travel or for transferring from one runway to another; Crossings; Combinations of tracks of different gauges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/06—Travelling gear incorporated in or fitted to trolleys or cranes for more than one rail gauge

Definitions

  • the present invention relates to a crane with a crane boom, which has at least two boom parts, and a trolley, which is movable along the crane boom over both boom parts, wherein the trolley at least one fixed first wheel for driving a first lane on a first boom part and at least one second impeller for driving a second lane on a second boom part, wherein the second impeller by means of a switching device which has a running on the jib parts button, when passing over the transition of the two jib parts between two positions is adjustable.
  • Such a crane is known for example from DE 299 16 416 U1.
  • the trolley of the crane described therein engages from below the lower chords of the telescoping jib parts. Since the inner, austeleskopierbare boom part must necessarily have a smaller cross-section than the outer boom part, the lanes on the various boom parts are not exactly behind each other, but offset from one another. According to DE 299 16 416 the lanes formed by the top of the lower chords for the wheels of the trolley are different Jib parts of different widths.
  • the trolley travels with two pairs of fixed wheels running on the tops of the lower straps. In addition, two pairs of wheels are provided, which are mounted in their distance adjustable on the trolley.
  • the moving wheels When driving on the wider lane of the outer boom part they are moved apart so that they run on top of the lower chords of the outer boom part. As soon as the trolley reaches the inner boom section, the moving wheels are driven inwards so that they run on the narrower lanes of the inner boom section.
  • the movable wheels are displaceably guided in sleeves along their axes of rotation and biased into the inner, narrower position by springs. With Tasträdem they are supported on the outsides of the lower straps, so that they can be adjusted at the transition of the boom parts by spring force.
  • slide-like guide grooves are provided in which guide pins connected to the adjustable wheels engage, forcibly transferring the wheels to the new position when the transition point between the jib parts is run over.
  • the running on the top of the lower chords wheels are guided by driving on the outside of the lower chords guide wheels in their track width, the lateral guide rollers in the transition region drive over a ramp and thread it into a positive control.
  • the lanes formed on the upper side of the lower chords for the wheels of the trolley are at exactly the same level, i. have no height offset, and that the wheels are pushed at the transition point across its direction without being lifted off the road to the new lane.
  • This known trolley for multi-part crane boom with a jump or offset between the trolley tracks on the boom parts can be improved in several ways.
  • the crane is thus distinguished by the fact that the switching device has a lever mechanism actuated by the push button on the jib parts, which completely lifts the second running wheel in the region of the first jib part from the crane jib and guides it in the second lane part in the region of the second jib part. Since the at least one movable impeller is completely lifted from the second boom part to the first boom part of the crane boom when crossing the transition point, the trolley moves on the first boom part alone with the fixed impeller or solid wheels. Conversely, the trolley moves on the second boom part alone with the at least one movable impeller, since the fixed impeller has lost, so to speak, the lane.
  • the probe runs in particular via a jump or contour offset at the transition point of the two jib parts and switches when driving over the surface offset or contour transition, the lever mechanism and the impeller attached thereto.
  • the complete lifting of the movable wheels allows greater freedom in the arrangement of the two lanes on the various boom parts, which can also have a greater offset to each other.
  • first lane and the second lane may indeed be arranged parallel, but offset in height from each other.
  • these can also be laterally offset from each other.
  • the crane boom is free of additional elements such. B. cam surfaces, scenes or other guide plates for actuating the switching device.
  • the actuation of the switchable wheels is done by anyway existing surfaces on the crane boom.
  • the structure of the crane boom can be simplified.
  • the button of the switching device runs on roadways
  • the outer surfaces of the jib parts in particular outer surfaces of the longitudinal straps of the jib parts, are formed, which are arranged substantially perpendicular to the lanes, and corresponding to the lanes at the transition of the two jib parts have a vertical offset substantially perpendicular to the vertical offset of the lanes.
  • the longitudinal straps of the inner boom part can thus be offset both in terms of their top and / or bottom as well as with respect to their outer side relative to the respective, subsequent longitudinal straps of the outer boom part.
  • the lever mechanism is formed in a further development of the invention such that the associated button remains unaffected by bearing forces of the second impeller.
  • the bearing forces acting on the second, movable impeller are thus introduced directly via the lever mechanism in the supporting frame of the trolley, without the button would have to absorb corresponding forces.
  • the latter is used solely for switching the position of the second wheels or their leadership on the second lane. This can be achieved by the impeller alone being movable in a plane parallel to the plane passing through the road surface of the second lane.
  • the lever mechanism may have a lever which carries the second impeller and is pivotally connected to a spaced portion hinged to the trolley, about a pivot axis perpendicular to the direction of the axis of rotation of the second impeller and / or perpendicular to the through the road surface of the second Lane going level.
  • the respective button on the lever mechanism in the direction of travel of the trolley between the fixed first impeller and the second wheel movably mounted If the trolley moves from the outer boom part to the inner boom part, the button passes over the jump at the transition point of the two boom parts and thereby switches the second wheel to the second lane before the first wheel leaves the first lane. Conversely, the button overruns the discontinuity between the two jib parts when returning to the outer boom part before the second, movably mounted impeller collides with the outer boom part.
  • the distance of the stylus from the pivot axis of the lever carrying the second movable impeller is smaller than the distance of the stylus from said second impeller.
  • a multiplication of the movement can be achieved in that a relatively small travel of the probe, as it occurs when crossing the offset of the longitudinal straps of the jib parts, causes a relatively larger travel of the lever attached to the second impeller.
  • the jib parts may each consist of a framework support having a top chord and two bottom chords, all of which extend in the longitudinal direction of the jib and determine an overall triangular cross-section.
  • the upper sides of the lower chords can form lanes on which run the first and second wheels of the trolley, while the button runs on the outside of the respective lower belt.
  • the running on the top wheels carry the trolley.
  • the first and second wheels of the trolley can also run on the outside of the lower chords, in which case the button runs either on the top or the bottom of the respective lower chord. In this case, the first and second wheels form lateral guide wheels.
  • the crane shown in Figure 1 is designed as a tower crane, which has a substantially horizontally extending crane jib 1.
  • the crane jib 1 is designed to be telescopic and comprises two jib parts 2 and 3, which are slidable into each other, as Figure 2 shows.
  • the two jib parts 2 and 3 are each formed as a truss and each having two longitudinally extending lower chords 4 and 5 and also extending in the longitudinal direction upper chord 6 and 7.
  • the upper and lower chords are connected by cross-struts.
  • the lower chords 5 of the inner jib part 3 are offset inwards relative to the lower chords 4 of the outer jib part 2.
  • tops of the lower chords 5 of the inner jib part 3 are offset in height from the upper sides of the lower chords 4 of the outer jib part 2 downwards. Also with respect to the undersides of the lower chords, a height offset is given, as Figure 2 shows.
  • a trolley 8 which surrounds the boom parts 2 and 3 from below U-shaped with a trolley frame.
  • the trolley 8 has on each side of the crane jib 1 two fixedly mounted first rollers 10, with where the trolley 8 can drive on the top of the lower chords 4 of the outer boom part 2.
  • the tops of the lower chords 4 thus form first lanes for the first wheels 10 mentioned.
  • the trolley 8 comprises on each side of the crane jib 1, two second wheels 11, which are each a little way in front of the respective first wheels 10, that is, closer to the boom tip, are arranged.
  • the second rollers 11, unlike the first rollers 10, are not fixedly mounted to the trolley frame 9, but with their axes movably, so that they can be moved between two positions.
  • a switching device 13 formed by a lever mechanism 12 is provided, which switches the said second wheels 11 when passing over the transition point between the two jib parts 2 and 3 or switches off.
  • the lever mechanism 12 consists of a lever 14 which carries at its one end a second roller 11 and is mounted at its other end about a pivot axis 15 pivotally mounted on the trolley frame 9.
  • the pivot axis 15 extends substantially vertically, ie perpendicular to the axis of rotation of the first and second wheels 10 and 11 and perpendicular to the tops of the lower chords 4 and 5.
  • the lever 14 is biased by a spring means 16, in such a way that the Lever 14 tries to press the second impeller 11 on the inwardly offset second lane on the lower flange 5 of the inner boom part 1.
  • the lever 14 is further provided with a button 17 in the form of a roller which runs on the outside of the lower chords 4 and 5 respectively. The arrangement is made such that the button 17, when it runs on the lower flange 4 of the outer boom part 2, pushes the lever 14 so far away that the second wheel 11 is completely lifted off the first boom part (see FIG.
  • the trolley 8 moves onto the second boom part 3, ie when the button 17 moves on the outside of the lower belt 5 of the inner boom part 3, then the spring 16 can press the lever 14 inwards to the extent that the second wheel 11 slides on the Top of the lower flange 5 of the inner boom part 3 runs.
  • the arrangement of the Hebelmechanismusses 12 is designed such that the entire load bearing forces acting on the second impeller 11 when it runs on the inner boom part 3, directly into the trolley frame. 9 be initiated without the button 17 would be applied to it. The latter is used alone to switch the position of the second impeller 11. As shown in Figures 3 to 5, the switching mechanism 12 comes without additional elements on the crane boom 1 from. The operation is effected solely by the already existing surfaces on the crane jib 1.
  • FIG. 6 A particular form of a telescopic boom is shown in FIG 6.
  • the lower chords 4 and 5 of the outer jib part 2 and the inner jib part 3 are arranged inside each other, so that the lanes 18 and 19 on the tops of the lower chords 4 and 5 only a vertical offset, but no have lateral offset.
  • the support function exporting rollers switchable, movably mounted rollers for driving the top of the lower flange 5 of the inner boom part 3 are provided. Fix arranged rollers can easily drive over a small height difference. Only for the tracking additional rollers are pivoted in order to guide the trolley 8 in the area of the narrower inner boom part 3 exactly.
  • first wheels may be arranged, which guide the trolley 8 in the region of the wider outer boom part 2.
  • Switchable second wheels are then switched on when the trolley passes over the transition of the two jib parts.
  • the arrangement of the fixed guide wheels and the switchable, movable guide wheels can correspond to the arrangement shown in Figures 3 to 5, with only the wheels then drive on the outside of the lower chords 4 and 5 and the button 17 on the bottom or possibly on the top of the lower chords 4 and 5 moves.
  • the trolley lanes can not only have an offset with crane arms with telescoping jib parts from one jib part to the next jib part.
  • non-telescopic jib parts may also have such an offset between the trolley tracks, for example if the second jib part has a smaller cross-section for reasons of transportability, or if other reasons necessitate a jump or a contour offset at the transition point between the jib parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
EP04010691A 2003-09-02 2004-05-05 Kran mit Laufkatze Expired - Lifetime EP1512660B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20313615U DE20313615U1 (de) 2003-09-02 2003-09-02 Kran
DE20313615U 2003-09-02

Publications (2)

Publication Number Publication Date
EP1512660A1 EP1512660A1 (de) 2005-03-09
EP1512660B1 true EP1512660B1 (de) 2006-11-08

Family

ID=34072143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04010691A Expired - Lifetime EP1512660B1 (de) 2003-09-02 2004-05-05 Kran mit Laufkatze

Country Status (5)

Country Link
EP (1) EP1512660B1 (es)
AT (1) ATE344779T1 (es)
DE (2) DE20313615U1 (es)
ES (1) ES2275149T3 (es)
PT (1) PT1512660E (es)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE770788A (fr) * 1970-08-05 1971-12-01 Potain Sa Fleche telescopique distributrice, notamment pour une grue
DE2236785C2 (de) * 1972-07-26 1973-11-22 Liebherr, Hans, Dr.-Ing. E.H., 7950 Biberach Laufkatzenausleger
FR2211393B1 (es) * 1972-12-27 1976-10-29 Pingon Pierre Joseph
LU85761A1 (fr) * 1985-02-06 1986-09-02 Fiordiligi Societe Anonyme Fleche telescopique d'une grue a tour ou analogue
DE19620150C2 (de) * 1996-04-19 1999-07-29 Mannesmann Ag Fahrwerk, insbesondere für Kettenzüge, Lastaufnahmemittel und/oder Schleppkabel
DE29916416U1 (de) * 1999-09-17 2000-04-13 Liebherr-Werk Biberach GmbH, 88400 Biberach Wagen, vorzugsweise Kran-Laufkatze

Also Published As

Publication number Publication date
ATE344779T1 (de) 2006-11-15
DE502004001941D1 (de) 2006-12-21
ES2275149T3 (es) 2007-06-01
PT1512660E (pt) 2007-01-31
DE20313615U1 (de) 2005-01-13
EP1512660A1 (de) 2005-03-09

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