EP3793930B1 - Support for the rear anchoring line of a telescopic crane - Google Patents

Support for the rear anchoring line of a telescopic crane Download PDF

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Publication number
EP3793930B1
EP3793930B1 EP19736696.6A EP19736696A EP3793930B1 EP 3793930 B1 EP3793930 B1 EP 3793930B1 EP 19736696 A EP19736696 A EP 19736696A EP 3793930 B1 EP3793930 B1 EP 3793930B1
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EP
European Patent Office
Prior art keywords
support
luffing
guying
jib
vehicle crane
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
EP19736696.6A
Other languages
German (de)
French (fr)
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EP3793930A1 (en
Inventor
Christian Moritz Urban
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.)
Tadano Demag GmbH
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Tadano Demag GmbH
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Publication date
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Publication of EP3793930A1 publication Critical patent/EP3793930A1/en
Application granted granted Critical
Publication of EP3793930B1 publication Critical patent/EP3793930B1/en
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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
    • B66C23/82—Luffing gear
    • 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
    • B66C23/42—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 with jibs of adjustable configuration, e.g. foldable
    • 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
    • B66C23/702—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic with a jib extension boom
    • 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
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B66C23/826—Bracing equipment acting at an inclined angle to vertical and horizontal directions
    • 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
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B66C23/823—Bracing equipment acting in vertical direction
    • 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

Definitions

  • the invention relates to a vehicle crane, in particular a mobile crane or crawler crane, with a telescoping main boom and a self-erecting guy support which is articulated on a telescopic section and which guides the luffing cable of a luffing main boom extension.
  • a telescopic boom of a crane which consists in the usual way of a basic box and several telescopic sections that can be telescoped out therefrom.
  • a guy frame with two guy supports that can be spread apart in a V-shape is arranged in the head area of at least one of the telescopic sections.
  • tie rods are arranged between a free end of the guy supports and a head region of an adjacent telescopic section. By extending this adjacent telescopic section, the guy supports are raised into the guyed position via the tie rods.
  • the tie rods are designed as manually adjustable telescopic tubes.
  • guy ropes are guided in the usual way for guying the telescopic boom over the free ends of the guy supports, which are fastened to at least one foot of the base box and to a head of the innermost telescopic section.
  • a mobile telescopic crane known a telescopic main boom.
  • a short lattice mast adapter is arranged on a head of the main boom, on which a main boom extension is mounted such that it can be rocked.
  • a luffing trestle is also mounted on the lattice mast adapter and is braced via a traction cable on a penultimate inner box of the main boom.
  • a block and tackle is attached to the trestle, which serves as a luffing gear for the main boom extension and is connected to a head of the main boom extension at the other end. The luffing rope running out of the block and tackle is led down to a luffing winch on an upper carriage of the mobile telescopic crane.
  • German patent application DE 1 922 950 A already a jib crane with a main boom and a main boom extension that can be luffed about a luffing axis.
  • two luffing supports are arranged, between the upper ends of which a block and tackle for luffing the main boom extension is arranged.
  • the luffing supports are each firmly braced with the main boom foot or the main boom extension head via a so-called neck cable.
  • a luffing rope running out of the block and tackle and necessary for luffing the main boom extension is not described.
  • the German Offenlegungsschrift DE 2 258 807 A already shows a mobile crane with a telescoping main boom, on which a foldable guy support is arranged for additional guying of the main boom.
  • the foldable guy support can be set up by an extension movement of the last inner box of the main boom.
  • a pair of guy supports for additional guying of the main boom is rigidly arranged on each head of a base box and inner box of a telescopic main boom.
  • the German Offenlegungsschrift DE 100 22 600 A1 already shows another mobile crane with a telescopic main boom with a pair of guy supports for additional guying of the main boom. The length of the guy supports can be changed in order to tighten the guying.
  • CN 107 117 542 A is already a vehicle crane according to the preamble of claim 1 with a main boom designed as a telescopic boom and at the head of the Telescopic boom luffing articulated main boom extension known.
  • the telescopic boom consists in the usual way of a base box and a large number of inner boxes that can be retracted and extended for this purpose.
  • a first luffing support, a second luffing support, a first tension cable, a block and tackle, a winch and a second tension cable are provided.
  • the lower end of the first tensioning cable is fastened in the area of the foot of the telescopic boom and on the opposite side at the tip of the first luffing support, which extends essentially horizontally.
  • the first luffing support is articulated at the upper end of the base box of the telescopic boom.
  • the first tension cable thus has a fixed length.
  • the pulley block is attached to the top of the first rocker support, the opposite end of which is attached to the top of the second rocker support, which is also horizontal.
  • the pulley is operated via a winch, which is mounted approximately in the middle of the first luffing support.
  • the second luffing support is pivoted at the base of the main boom extension.
  • the second guy wire also has a fixed length and is attached to the tip of the second luffing prop on one side and to the head of the main boom extension on the other side.
  • the object of the invention is to provide a mobile crane with an improved lifting capacity.
  • a mobile crane in particular a mobile crane, with a main boom and a main boom extension mounted thereon that can be luffed via at least one luffing cable
  • the main boom being designed as a telescopic boom with a boom base box and several telescopic sections and the main boom being mounted on an upper carriage of the mobile crane so that it can be raised
  • the luffing cable starting from a winch on the mobile crane at least one guy support and at least one luffing support guided in the area of a main boom head and fastened there
  • an improved carrying capacity is achieved in that the winch is arranged in a rear area of the superstructure, the at least one guy support is arranged on the main boom between the boom base box and the innermost telescopic section , which deflects the luffing rope for guying the main boom and alternatively the luffing rope is guided further from the luffing support to the main boom extension and fastened there.
  • the luffing cable is supported on the guy support, at least when the vehicle crane is in operation, and is correspondingly deflected or deflected by the guy support.
  • the normal force in the guy support is introduced into the main boom via this guy support with the luffing rope, which again stabilizes a main boom that is bent under load in the sense of reducing the deflection.
  • This guy support advantageously interacts with the already existing and prestressed luffing cable and thus avoids the installation of an additional guy line, which would otherwise have to be mounted and prestressed in a time-consuming manner.
  • the guy support is positioned in the middle area of the main boom, ie outside of the head and base of the main boom.
  • the at least one guy support is arranged on the main boom between the boom base box and the innermost telescopic section, i.e. between the base box and head box is. It is particularly advantageous here that the at least one guy support is arranged on the main boom in the region of the middle three, preferably two, particularly preferably the one middle, telescopic section.
  • a deflection pulley is mounted on a free end of the guy support, over which the luffing cable is guided.
  • the supporting forces from the luffing cable can simply be introduced into the main boom and the telescopic sections can continue to be telescoped.
  • guy rods to further luffing supports and are in extension of the luffing cable used for the main boom extension in order to ultimately achieve a connection with the main boom extension to be luffed instead of a continuous luffing rope from the winch to the main boom extension, at least parts of it from the first luffing support in the direction of the main boom extension can be replaced by guy rods, straps, chains or other flexible components with high tensile strength.
  • the guy support is arranged on the main boom so that it can pivot about a horizontal axis and the guy support can be raised from a rest position into an operating position.
  • the at least one guy support is advantageously arranged on a head of a telescopic section of the telescopic boom.
  • the guy support closes an angle to the main boom in the operating position in the range of 75 to 85 degrees, preferably 80 degrees , a.
  • An angle of 90 degrees is preferable for raising the support with a hydraulic cylinder.
  • the guy support in the operating position encloses an angle to the main boom in the range of 75 to 90 degrees.
  • a particularly simple erection of the guy support in terms of self-erecting is achieved in that the main boom is designed as a telescopic boom and the guy support can be erected from the rest position into the operating position via an extension movement of the telescopic boom.
  • a telescopic boom can be extended further for comparable loads and correspondingly higher lifting heights are achieved.
  • the guy support can be erected via a raising rope, which acts on the end of the guy support via a bracket on the guy support and is connected to a head of a telescopic section above the guy support.
  • a safety rope limits a maximum erection of the guy support and the safety rope acts on the end of the guy support and is connected to a head of a telescopic section below the guy support.
  • the guy support is prevented from folding away upwards.
  • guy supports are arranged on different heads of telescopic sections of the telescopic boom.
  • a guy support that can be variably adjusted in terms of its length is particularly preferred.
  • the deflection point or guide point between the guy support and the luffing cable can be shifted as far as possible away from the main boom in the orthogonal direction.
  • the figure 1 is a schematic side view of a mobile crane 1, in particular a mobile crane, with an undercarriage 2 and an uppercarriage 3.
  • the undercarriage 2 has a driver's cab 4 and six axles 5, each with two roadworthy and rubber-tyred wheels 6.
  • the undercarriage 2 can, of course, have more or fewer than six vehicle axles 5 or, alternatively, a crawler chassis.
  • the upper carriage 3 is mounted pivotably about a vertically aligned axis of rotation D on the undercarriage 2 .
  • the upper carriage 3 and the undercarriage 2 can also be mounted rigidly one on top of the other.
  • a main boom 7 is arranged, which as Telescopic boom is designed arranged.
  • the main boom 7 comprises a boom base box 7a and a plurality of telescope sections 7b to 7f which are arranged one inside the other and can be telescoped out.
  • the boom base box 7a can be erected on the superstructure 3 by a luffing cylinder 8, whereby the main boom 7 can be placed on the undercarriage 2 for road travel after the telescopic sections 7b to 7f have been fully retracted into the boom base box 7a.
  • a luffing main boom extension 8 designed as a lattice mast carrier is pivotably attached, which can be erected about a horizontal luffing axis W relative to the main boom 7 .
  • the luffing axis W is aligned orthogonally to the longitudinal axis of the main boom 7 in the usual way.
  • at least one luffing cable 9 is provided for the luffing process of the main boom extension 8, which extends from a winch, not shown, which is arranged in the rear area of the superstructure 3, to a first luffing support 10a and is fastened there.
  • the function of the luffing rope 9 is taken over by guy rods 16, which are fastened in a corresponding manner between the first luffing support 10a and a second luffing support 10b and between the second luffing support 10b and approximately the middle of the main boom extension 8.
  • the first luffing support 10a and the second luffing support 10b are articulated about horizontal axes in the usual manner in the region of the main boom head 7g and extend rearwardly in relation to the main boom 7 and in a V-shape to one another.
  • This at least one luffing cable 9 is additionally braced via a further guy support 11 according to the invention in the area of the main boom 7 .
  • the guy support 11 is pivotable about a horizontal axis A approximately in the middle of the main boom 7 and is thus arranged in an articulated manner.
  • the guy support 11 can be arranged between the articulation of the luffing cylinder 8 on the main boom 7 and the main boom head 7g. From a static point of view, in terms of relieving the main boom 7, there will certainly be a middle range at the end.
  • two or more guy supports 11 can also be arranged at a distance along the rear side of the main boom 7 .
  • another secondary guy support 12a is fastened to the head or upper end of the boom base box 7a, which also extends approximately at right angles to the rear, starting from the boom base box 7a.
  • This secondary guy support 12a is part of a main boom guying, which includes a secondary guy cable 12b.
  • the guy rope 12b is guided from a foot of the boom base box 7a via the auxiliary guy support 12a to the main boom head 7g.
  • the secondary guy support 12a can also be designed as a pair of guy supports arranged next to one another in a V-shape in a horizontal plane. This additional secondary guying 12a, 12b also serves to stiffen the main boom 7.
  • FIG. 12 is a partial view of the main boom 7 of the mobile crane 1 according to FIG figure 1 shown, wherein the guy support 11 is shown in one of three positions.
  • the main boom extension 8 has been left out to show the guy support 11 better. Since the figure 1 for the most part identical to the Figures 2a to 2c is, only the differences between the individual figures in the area of the guy support 11 will be discussed in the following paragraphs.
  • the Figure 2a shows the second guy support 15 in a rest position or transport position which is not erected on the main boom 8 but folded in and almost resting on the main boom 7 .
  • the telescopic sections 7b, 7c, 7e and 7f are fully or far extended and the third telescopic section 7d only partially (about 10%).
  • the third telescopic section 7d is only telescoped out so far that a righting rope 14 is tightened, but the guy support 11 has not yet moved away from the rest position resting against the main boom 7 .
  • the righting rope 14 is attached at one end to an upper end of the third telescopic section 7d and at the other end to the guy support 11 in the region of its free end 11a on a console 11b, in particular a front-end console.
  • the console 11b is arranged at right angles to the guy support 11 and protrudes backwards, and the righting rope 14 acts on the free end of the console. Furthermore, from the Figure 2a It can be seen that the free end 11a of the guy support 11 rotatably carries a deflection pulley 11c which is in engagement with the luffing cable 9 in the operating position (see Figure 2c ).
  • the righting rope 19 can of course also be attached to a head of another telescopic section 7e or 7f.
  • a safety rope 15 hangs without tension between the free end 11a of the guy support 11, the second guy support 15 and the head of the first telescopic section 7a.
  • the safety rope 15 can also be mounted on the head of another telescopic section 7b to 7f--depending on where the guy support 11 is installed--on the head of the boom base box 7a or on the superstructure 3.
  • the function of the safety rope 15 is to prevent the guy support 11 from folding away upwards. In the rest position shown here, there is no contact between the deflection roller 11c and the luffing cable 9.
  • the luffing cable 9 thus leads from the superstructure 3 to the first luffing support 10 without deflection.
  • the guy support 11 is in an intermediate position, ie between the rest position and an operating position.
  • the telescopic sections 7b and 7f of the main boom 8 are fully extended, the second telescopic section 7c approximately 90%, the third telescopic section 7d approximately 20% and the fourth telescopic section 7e approximately 45%.
  • the third telescopic shot 7d is compared to that Figure 2a further telescoped out, so that the righting rope 14 raises or pulls up the guy support 11 from its stored rest position and the deflection roller 11 comes into first contact with the luffing rope 9 and threads it into it.
  • the safety rope 15 is still not tensioned in this intermediate position of the guy support 11 .
  • the luffing cable 9 is not yet deflected by the deflection pulley 11c. There is only a first contact between the seesaw cable 9, which forms a guying, and the deflection roller 11c.
  • the Figure 2c shows another partial view of figure 1 , in which the guy support 11 is shown in the upright operating position.
  • An angle between the guy support 11 and the second telescopic section 7c is about 75 to 90 degrees, preferably 80 degrees, so that under the action of the deflection force from the luffing cable 9, the guy support 11 automatically returns to the idle state for transport even when telescoping telescopic section 7d.
  • the telescopic sections 7b and 7c of the main boom 8 are about 90% extended and the telescopic committees 7d to 7f about 45%. Because the second and third telescopic committee 7c, 7d are each not fully extended, the tension in the righting rope 14 and the safety rope 15 can be adjusted.
  • the guy support 11 engages in the luffing cable 9 with its deflection pulley 11c and deflects the luffing cable 9 via the deflection pulley 11c.
  • the main boom 7 is braced or stabilized in addition to the secondary guying 12a, 12b. Deformation of the main boom 7 in the direction of loading and large deflections of the main boom 7 can be reduced as a result.
  • the invention is described using a mobile crane with a telescopic boom. It goes without saying that the principle of the present invention is also applicable to lattice booms or folding jibs (lattice boom or box-type foldable boom), and also to crawler cranes.
  • the guy support can be brought into the operating position via at least one hydraulic righting cylinder. In this alternative, an angle of about 90 degrees between the main boom 7 and guy support 11 would be preferred.
  • mobile crane 1 has a main boom 7 as a telescopic boom with a boom base box 7a and several telescopic sections 7b to 7f, the at least one guy support 11 on the main boom 7 between the boom base box 7a and the innermost telescopic section 7f is arranged.
  • the at least one guy support 11 on the main boom 7 should be in the middle three (if the total number of boom base box 7a and telescopic sections 7b to 7f is odd), preferably two (if the total number of boom base box 7a and telescopic sections 7b to 7f is even), particularly preferably of a central telescopic section 7c, 7d (if the total number of boom base boxes 7a and telescopic sections 7b to 7f is odd) is arranged.
  • the mobile crane 1 is equipped with a main boom 7 as a telescopic boom with a boom base box 7a and several telescopic sections 7b to 7f
  • the main boom 7 can be luffed via a luffing cylinder 13 articulated on the boom base box 7a, then the at least one guy support 11 is on the Main boom 7 is arranged between a linkage of the luffing cylinder 13 on the boom base box 7a and the innermost telescopic section 7f.

Description

Die Erfindung betrifft einen Fahrzeugkran, insbesondere Mobilkran oder Raupenkran, mit einem teleskopierbaren Hauptausleger und einer an einem Teleskopschuss gelenkig gelagerten selbstaufrichtbaren Abspannstütze, welche das Wippseil einer wippbaren Hauptauslegerverlängerung führt.The invention relates to a vehicle crane, in particular a mobile crane or crawler crane, with a telescoping main boom and a self-erecting guy support which is articulated on a telescopic section and which guides the luffing cable of a luffing main boom extension.

Aus der deutschen Gebrauchsmusterschrift DE 202 19 126 U1 ist ein Teleskopausleger eines Krans bekannt, der in üblicher Weise aus einem Grundkasten und mehreren hieraus austeleskopierbaren Teleskopschüssen besteht. An mindestens einem der Teleskopschüsse ist in dessen Kopfbereich ein Abspannbock mit zwei V-förmig aufspreizbaren Abspannstützen angeordnet. Um die Abspannstützen aus einer Ruhestellung in etwa parallel zu dem jeweiligen Teleskopschuss in eine Abspannstellung aufzustellen, sind jeweils Zuganker zwischen einem freien Ende der Abspannstützen und einem Kopfbereich eines benachbarten Teleskopschusses angeordnet. Über ein Ausfahren dieses benachbarten Teleskopschusses werden die Abspannstützen über die Zuganker in die Abspannstellung aufgerichtet. Um das Aufrichten der Abspannstützen an den geplanten Ausfahrweg des benachbarten Teleskopschusses anzupassen, sind die Zuganker als manuell einstellbare Teleskoprohre ausgebildet. In der Abspannstellung sind in üblicher Weise für die Abspannung des Teleskopauslegers über die freien Enden der Abspannstützen jeweils Abspannseile geführt, welche mindestens an einem Fuß des Grundkastens und an einem Kopf des innersten Teleskopschusses befestigt sind.From the German utility model specification DE 202 19 126 U1 a telescopic boom of a crane is known, which consists in the usual way of a basic box and several telescopic sections that can be telescoped out therefrom. A guy frame with two guy supports that can be spread apart in a V-shape is arranged in the head area of at least one of the telescopic sections. In order to set up the guy supports from a rest position approximately parallel to the respective telescopic section into a guyed position, tie rods are arranged between a free end of the guy supports and a head region of an adjacent telescopic section. By extending this adjacent telescopic section, the guy supports are raised into the guyed position via the tie rods. In order to adapt the erection of the guy supports to the planned extension path of the neighboring telescopic section, the tie rods are designed as manually adjustable telescopic tubes. In the guyed position, guy ropes are guided in the usual way for guying the telescopic boom over the free ends of the guy supports, which are fastened to at least one foot of the base box and to a head of the innermost telescopic section.

Des Weiteren ist aus der deutschen Gebrauchsmusterschrift DE 20 2014 006 460 U1 eine weitere Abspannung eines Teleskopauslegers eines Krans bekannt, die ebenfalls zwei V-förmig aufspreizbare Abspannstützen aufweist. Um diese Abspannstützen aufzustellen, werden die Abspannseile kombiniert mit der Ausfahrbewegung des benachbarten Teleskopschusses verwendet. Um die Ausfahrbewegung des benachbarten Teleskopschusses auf die Abspannstützen über das jeweilige Abspannseil zu übertragen, ist das Abspannseil jeweils im Bereich des freien Endes der Abspannstütze nach Bedarf festlegbar.Furthermore, from the German utility model specification DE 20 2014 006 460 U1 Another guying of a telescopic boom of a crane is known, which also has two guying supports that can be spread apart in a V-shape. In order to set up these guy supports, the guy ropes are used in combination with the extension movement of the neighboring telescopic section. In order to transmit the extension movement of the adjacent telescopic section to the guy supports via the respective guy rope, the guy rope can be fixed in place in the area of the free end of the guy support as required.

Ferner ist aus dem deutschen Patent DE 40 05 082 C1 ein Fahrzeugteleskopkran mit einem telekopierbaren Hauptausleger bekannt. An einem Kopf des Hauptauslegers ist ein kurzer Gittermastadapter angeordnet, an dem eine Hauptauslegerverlängerung wippbar gelagert ist. Auch ist an dem Gittermastadapter ein wippbarer Bock gelagert, der über ein Zugseil an einem vorletzten Innenkasten des Hauptauslegers abgespannt ist. An dem Bock ist ein Flaschenzug befestigt, der als Wippwerk für die Hauptauslegerverlängerung dient und an der an dem anderen Ende mit einem Kopf der Hauptauslegerverlängerung verbunden ist. Das aus dem Flaschenzug herauslaufende Wippseil ist nach unten zu einer Wippwinde auf einem Oberwagen des Fahrzeugteleskopkrans geführt.Furthermore, from the German patent DE 40 05 082 C1 a mobile telescopic crane known a telescopic main boom. A short lattice mast adapter is arranged on a head of the main boom, on which a main boom extension is mounted such that it can be rocked. A luffing trestle is also mounted on the lattice mast adapter and is braced via a traction cable on a penultimate inner box of the main boom. A block and tackle is attached to the trestle, which serves as a luffing gear for the main boom extension and is connected to a head of the main boom extension at the other end. The luffing rope running out of the block and tackle is led down to a luffing winch on an upper carriage of the mobile telescopic crane.

Außerdem zeigt die deutsche Offenlegungsschrift DE 1 922 950 A bereits einen Auslegerkran mit einem Hauptausleger und einer hieran um eine Wippachse wippbaren Hauptauslegerverlängerung. Im Bereich der Wippachse sind zwei Wippstützen angeordnet, zwischen deren oberen Enden ein Flaschenzug zum Wippen der Hauptauslegerverlängerung angeordnet ist. Hierfür sind die Wippstützen jeweils über ein sogenanntes Nackenseil mit dem Hauptauslegerfuß beziehungsweise dem Hauptauslegerverlängerungskopf fest verspannt. Ein aus dem Flaschenzug herauslaufendes und zum Wippen der Hauptauslegerverlängerung notwendiges Wippseil ist nicht beschrieben.In addition, the German patent application DE 1 922 950 A already a jib crane with a main boom and a main boom extension that can be luffed about a luffing axis. In the area of the luffing axis, two luffing supports are arranged, between the upper ends of which a block and tackle for luffing the main boom extension is arranged. For this purpose, the luffing supports are each firmly braced with the main boom foot or the main boom extension head via a so-called neck cable. A luffing rope running out of the block and tackle and necessary for luffing the main boom extension is not described.

Die deutsche Offenlegungsschrift DE 2 258 807 A zeigt bereits einen Fahrzeugkran mit einem telekopierbaren Hauptausleger, an dem eine anklappbare Abspannstütze für eine zusätzliche Abspannung des Hauptauslegers angeordnet ist. Die anklappbare Abspannstütze ist durch eine Ausfahrbewegung eines letzten Innenkastens des Hauptauslegers aufstellbar. In der deutschen Offenlegungsschrift DE 10 2016 114 837 A1 ist an jedem Kopf eines Grundkastens und Innenkastens eines telekopierbaren Hauptauslegers ein Paar Abspannstützen einer zusätzlichen Abspannung des Hauptauslegers starr angeordnet. Die deutsche Offenlegungsschrift DE 100 22 600 A1 zeigt bereits einen weiteren Fahrzeugkran mit einem telekopierbaren Hauptausleger mit einem Paar Abspannstützen für eine zusätzliche Abspannung des Hauptauslegers. Die Abspannstützen sind jeweils in der Länge veränderbar, um die Abspannung zu spannen.The German Offenlegungsschrift DE 2 258 807 A already shows a mobile crane with a telescoping main boom, on which a foldable guy support is arranged for additional guying of the main boom. The foldable guy support can be set up by an extension movement of the last inner box of the main boom. In the German Offenlegungsschrift DE 10 2016 114 837 A1 a pair of guy supports for additional guying of the main boom is rigidly arranged on each head of a base box and inner box of a telescopic main boom. The German Offenlegungsschrift DE 100 22 600 A1 already shows another mobile crane with a telescopic main boom with a pair of guy supports for additional guying of the main boom. The length of the guy supports can be changed in order to tighten the guying.

Aus der Offenlegungsschrift CN 107 117 542 A ist bereits ein Fahrzeugkra gemäß dem Oberbegriff des Anspruchs 1 mit einem als Telekopausleger ausgebildeten Hauptausleger und einer am Kopf des Telekopauslegers wippbar angelenkten Hauptauslegerverlängerung bekannt. Der Telekopausleger besteht in üblicher Weise aus einem Grundkasten und einer Vielzahl hierzu ein- und ausfahrbaren Innenkästen.From the disclosure document CN 107 117 542 A is already a vehicle crane according to the preamble of claim 1 with a main boom designed as a telescopic boom and at the head of the Telescopic boom luffing articulated main boom extension known. The telescopic boom consists in the usual way of a base box and a large number of inner boxes that can be retracted and extended for this purpose.

Um die Hauptauslegerverlängerung wippen zu können, sind eine erste Wippstütze, eine zweite Wippstütze, ein erstes Spannseil, ein Flaschenzug, ein Windwerk und ein zweites Spannseill vorgesehen. Das erste Spannseil ist mit seinem unteren Ende im Bereich des Fußes des Teleskopauslegers befestigt und gegenüberliegend an der Spitze der sich im Wesentlichen horizontal erstreckenden ersten Wippstütze. Die erste Wippstütze ist am oberen Ende des Grundkastens des Teleskopauslegers angelenkt. Das erste Spannseil hat somit eine feste Länge. An der Spitze der ersten Wippstütze ist der Flaschenzug angeschlagen, dessen gegenüberliegendes Ende an der Spitze der zweiten ebenfalls horizontal ausgerichteten Wippstütze befestigt ist. Der Flaschenzug wird über ein Windwerk betätigt, das in etwa in der Mitte der ersten Wippstütze gelagert ist. Die zweite Wippstütze ist am Fuß der Hauptauslegerverlängerung angelenkt. Entsprechend dem ersten Spannseil hat das zweite Spannseil auch eine feste Länge und ist einerseits an der Spitze der zweiten Wippstütze und andererseits an dem Kopf der Hauptauslegerverlängerung befestigt. Durch Betätigung des Flaschenzuges kann somit der Abstand zwischen den beiden Wippstützen und verändert werden und somit ein Neigen und Aufstellen der Hauptauslegerverlängerung erfolgen.In order to be able to luff the main boom extension, a first luffing support, a second luffing support, a first tension cable, a block and tackle, a winch and a second tension cable are provided. The lower end of the first tensioning cable is fastened in the area of the foot of the telescopic boom and on the opposite side at the tip of the first luffing support, which extends essentially horizontally. The first luffing support is articulated at the upper end of the base box of the telescopic boom. The first tension cable thus has a fixed length. The pulley block is attached to the top of the first rocker support, the opposite end of which is attached to the top of the second rocker support, which is also horizontal. The pulley is operated via a winch, which is mounted approximately in the middle of the first luffing support. The second luffing support is pivoted at the base of the main boom extension. Like the first guy wire, the second guy wire also has a fixed length and is attached to the tip of the second luffing prop on one side and to the head of the main boom extension on the other side. By operating the block and tackle, the distance between the two luffing supports and can be changed and the main boom extension can be tilted and raised.

Der Erfindung liegt die Aufgabe zugrunde, einen Fahrzeugkran mit verbesserter Tragfähigkeit bereit zu stellen.The object of the invention is to provide a mobile crane with an improved lifting capacity.

Diese Aufgabe wird durch einen Fahrzeugkran mit den Merkmalen des Anspruchs 1 gelöst. In den abhängigen Ansprüchen 2 bis 12 sind vorteilhafte Ausgestaltungen der Erfindung angegeben.This object is achieved by a mobile crane with the features of claim 1. In the dependent claims 2 to 12 advantageous embodiments of the invention are specified.

Erfindungsgemäß wird bei einem Fahrzeugkran, insbesondere Mobilkran, mit einem Hauptausleger und einer hieran gelagerten über mindestens ein Wippseil wippbaren Hauptauslegerverlängerung, wobei der Hauptausleger als Teleskopausleger mit einem Auslegergrundkasten und mehreren Teleskopschüssen ausgebildet und der Hauptausleger an einem Oberwagen des Fahrzeugkrans aufrichtbar gelagert ist, wobei das Wippseil ausgehend von einer Winde an dem Fahrzeugkran über mindestens eine Abspannstütze und mindestens eine Wippstütze im Bereich eines Hauptauslegerkopfs geführt und dort befestigt, eine verbesserte Tragfähigkeit dadurch erreicht, dass die Winde in einem hinteren Bereich des Oberwagens angeordnet ist, die mindestens eine Abspannstütze an dem Hauptausleger zwischen dem Auslegergrundkasten und dem innersten Teleskopschuss angeordnet ist, die zur Abspannung des Hauptauslegers das Wippseil umgelenkt und alternativ das Wippseil von der Wippstütze weiter bis zu der Hauptauslegerverlängerung geführt und dort befestigt ist. Hierdurch stützt sich das Wippseil zumindest im Betrieb des Fahrzeugkrans an der Abspannstütze ab und wird von der Abspannstütze entsprechend ausgelenkt beziehungsweise umgelenkt. Über diese Abspannstütze mit dem Wippseil wird die Normalkraft in der Abspannstütze in den Hauptausleger eingebracht, die einen unter Last gebogenen Hauptausleger wieder stabilisiert im Sinne einer Zurücknahme der Durchbiegung. Hierdurch kann die Tragfähigkeit des Fahrzeugkrans gesteigert werden, indem die einzelnen Teleskopschüsse entlastet werden. Diese Abspannstütze wirkt vorteilhafter Weise mit dem bereits vorhandenen und vorgespannten Wippseil zusammen und vermeidet somit die Installation eines zusätzlichen Abspannstrangs, welcher ansonsten zeitaufwändig montiert und vorgespannt werden müsste. Um die Stützkraft zu optimieren, ist die Abspannstütze im mittleren Bereich des Hauptauslegers angeordnet, d. h. außerhalb von Kopf und Fuß des Hauptauslegers. In Bezug auf einen Fahrzeugkran mit einem Hauptausleger, der als Teleskopausleger mit einem Auslegergrundkasten und mehreren Teleskopschüssen ausgebildet ist, ist vorteilhafter Weise vorgesehen, dass die mindestens eine Abspannstütze an dem Hauptausleger zwischen dem Auslegergrundkasten und dem innersten Teleskopschuss, also zwischen Grund- und Kopfkasten, angeordnet ist. Besonders vorteilhaft ist hierbei vorgesehen, dass die mindestens eine Abspannstütze an dem Hauptausleger im Bereich der mittleren drei, vorzugsweise zwei, besonders vorzugsweise des einem mittleren, Teleskopschusses angeordnet ist.According to the invention, in a mobile crane, in particular a mobile crane, with a main boom and a main boom extension mounted thereon that can be luffed via at least one luffing cable, the main boom being designed as a telescopic boom with a boom base box and several telescopic sections and the main boom being mounted on an upper carriage of the mobile crane so that it can be raised, the luffing cable starting from a winch on the mobile crane at least one guy support and at least one luffing support guided in the area of a main boom head and fastened there, an improved carrying capacity is achieved in that the winch is arranged in a rear area of the superstructure, the at least one guy support is arranged on the main boom between the boom base box and the innermost telescopic section , which deflects the luffing rope for guying the main boom and alternatively the luffing rope is guided further from the luffing support to the main boom extension and fastened there. As a result, the luffing cable is supported on the guy support, at least when the vehicle crane is in operation, and is correspondingly deflected or deflected by the guy support. The normal force in the guy support is introduced into the main boom via this guy support with the luffing rope, which again stabilizes a main boom that is bent under load in the sense of reducing the deflection. This allows the lifting capacity of the mobile crane to be increased by relieving the individual telescopic sections. This guy support advantageously interacts with the already existing and prestressed luffing cable and thus avoids the installation of an additional guy line, which would otherwise have to be mounted and prestressed in a time-consuming manner. In order to optimize the supporting force, the guy support is positioned in the middle area of the main boom, ie outside of the head and base of the main boom. With regard to a mobile crane with a main boom, which is designed as a telescopic boom with a boom base box and several telescopic sections, it is advantageously provided that the at least one guy support is arranged on the main boom between the boom base box and the innermost telescopic section, i.e. between the base box and head box is. It is particularly advantageous here that the at least one guy support is arranged on the main boom in the region of the middle three, preferably two, particularly preferably the one middle, telescopic section.

In vorteilhafter Weise ist an einem freien Ende der Abspannstütze eine Umlenkrolle gelagert, über die das Wippseil geführt ist. Somit können einfach die Stützkräfte aus dem Wippseil in den Hauptausleger eingeleitet werden und die Teleskopschüsse können weiterhin teleskopiert werden.Advantageously, a deflection pulley is mounted on a free end of the guy support, over which the luffing cable is guided. In this way, the supporting forces from the luffing cable can simply be introduced into the main boom and the telescopic sections can continue to be telescoped.

Für den Fall, dass das Wippseil im Bereich der mindestens einen Wippstütze endet, werden in Verlängerung des Wippseils Abspannstangen zu weiteren Wippstützen und zur Hauptauslegerverlängerung verwendet, um letztendlich eine Verbindung mit der zu wippenden Hauptauslegerverlängerung zu erzielen. Anstatt eines durchgehenden Wippseils von der Winde bis zur Hauptauslegerverlängerung, können zumindest Teile hiervon ab der ersten Wippstütze in Richtung der Hauptauslegerverlängerung durch Abspannstangen, Bänder, Ketten oder andere biegeweiche Bauteile mit hoher Zugfestigkeit ersetzt werden.In the event that the luffing rope ends in the area of at least one luffing support, guy rods to further luffing supports and are in extension of the luffing cable used for the main boom extension in order to ultimately achieve a connection with the main boom extension to be luffed. Instead of a continuous luffing rope from the winch to the main boom extension, at least parts of it from the first luffing support in the direction of the main boom extension can be replaced by guy rods, straps, chains or other flexible components with high tensile strength.

Ein Transport und eine Montage der Abspannstütze wird dadurch erleichtert, dass die Abspannstütze um eine horizontale Achse schwenkbar an dem Hauptausleger angeordnet ist und die Abspannstütze aus einer Ruhestellung in eine Betriebsstellung aufrichtbar ist. Vorteilhafter Weise sind hierbei die mindestens eine Abspannstütze an einem Kopf eines Teleskopschusses des Teleskopauslegers angeordnet.Transport and assembly of the guy support is facilitated in that the guy support is arranged on the main boom so that it can pivot about a horizontal axis and the guy support can be raised from a rest position into an operating position. The at least one guy support is advantageously arranged on a head of a telescopic section of the telescopic boom.

Um im Sinne einer Rückschwenkrichtung der Abspannstütze unter Eigengewicht oder unter der Umlenkkraft, die aus dem umgelenkten Wippseil herrührt, eine klar definierte Kinematik zu erhalten, schließt die Abspannstütze in der Betriebsstellung einen Winkel zu dem Hauptausleger im Bereich von 75 bis 85 Grad, vorzugsweise 80 Grad, ein. Für ein Aufrichten der Abstützung mit einem Hydraulikzylinder ist ein Winkel von 90 Grad zu bevorzugen. Insgesamt schließt die Abspannstütze in der Betriebsstellung einen Winkel zu dem Hauptausleger im Bereich von 75 bis 90 Grad ein.In order to obtain clearly defined kinematics in the sense of a backwards pivoting direction of the guy support under its own weight or under the deflection force resulting from the deflected luffing cable, the guy support closes an angle to the main boom in the operating position in the range of 75 to 85 degrees, preferably 80 degrees , a. An angle of 90 degrees is preferable for raising the support with a hydraulic cylinder. Overall, the guy support in the operating position encloses an angle to the main boom in the range of 75 to 90 degrees.

Ein besonders einfaches Aufrichten der Abspannstütze im Sinne eines Selbstaufrichtens wird dadurch erreicht, dass der Hauptausleger als Teleskopausleger ausgebildet ist und die Abspannstütze über eine Ausfahrbewegung des Teleskopauslegers aus der Ruhestellung in die Betriebsstellung aufrichtbar ist. Außerdem kann unter der vorhandenen erfindungsgemäßen Abspannung ein Teleskopausleger für vergleichbare Lasten weiter ausgefahren werden und entsprechend werden höhere Hubhöhen erreicht.A particularly simple erection of the guy support in terms of self-erecting is achieved in that the main boom is designed as a telescopic boom and the guy support can be erected from the rest position into the operating position via an extension movement of the telescopic boom. In addition, under the existing guying according to the invention, a telescopic boom can be extended further for comparable loads and correspondingly higher lifting heights are achieved.

Hierfür ist vorteilhafter Weise vorgesehen, dass die Abspannstütze über ein Aufrichteseil aufrichtbar ist, das an dem Ende der Abspannstütze über eine Konsole an der Abspannstütze angreift und mit einem Kopf eines Teleskopschusses oberhalb der Abspannstütze verbunden ist.For this purpose, it is advantageously provided that the guy support can be erected via a raising rope, which acts on the end of the guy support via a bracket on the guy support and is connected to a head of a telescopic section above the guy support.

Aus Sicherheitserwägungen ist vorgesehen, dass ein Sicherheitsseil eine maximale Aufrichtung der Abspannstütze begrenzt und das Sicherheitsseil an dem Ende der Abspannstütze angreift und mit einem Kopf eines Teleskopschusses unterhalb der Abspannstütze verbunden ist. Ein Nach-oben-Wegklappen der Abspannstütze wird verhindert.For safety reasons it is provided that a safety rope limits a maximum erection of the guy support and the safety rope acts on the end of the guy support and is connected to a head of a telescopic section below the guy support. The guy support is prevented from folding away upwards.

In einer vorteilhaften Ausgestaltung ist vorgesehen, dass mehrere Abspannstützen an verschiedenen Köpfen von Teleskopschüssen des Teleskopauslegers angeordnet sind.In an advantageous embodiment, it is provided that several guy supports are arranged on different heads of telescopic sections of the telescopic boom.

Besonders bevorzugt ist, eine Abspannstütze, die in ihrer Länge variabel einstellbar ist. Hierdurch kann die Umlenkstelle beziehungsweise Führungsstelle zwischen der Abspannstütze und dem Wippseil so weit wie möglich vom Hauptausleger in orthogonaler Richtung wegverschoben werden.A guy support that can be variably adjusted in terms of its length is particularly preferred. As a result, the deflection point or guide point between the guy support and the luffing cable can be shifted as far as possible away from the main boom in the orthogonal direction.

Ein Ausführungsbeispiel der Erfindung wird anhand der nachfolgenden Beschreibung näher erläutert. Es zeigen:

  • Figur 1 eine schematische Seitenansicht eines Fahrzeugkrans mit Hauptausleger und einer wippbaren Hauptauslegerverlängerung,
  • Figur 2a eine Teilansicht des Fahrzeugkrans gemäß Figur 1 aus dem Bereich des Hauptauslegers mit einer Abspannstütze in Ruhestellung,
  • Figur 2b eine Teilansicht gemäß Figur 2a mit einer Abspannstütze in Zwischenstellung und
  • Figur 2c eine Teilansicht gemäß Figur 2a mit einer Abspannstütze in Betriebsstellung.
An embodiment of the invention is explained in more detail with reference to the following description. Show it:
  • figure 1 a schematic side view of a mobile crane with a main boom and a luffing main boom extension,
  • Figure 2a a partial view of the mobile crane according to FIG figure 1 from the area of the main boom with a guy support in the rest position,
  • Figure 2b a partial view according to Figure 2a with a guy support in intermediate position and
  • Figure 2c a partial view according to Figure 2a with a guy support in operating position.

Die Figur 1 ist eine schematische Seitenansicht eines Fahrzeugkrans 1, insbesondere eines Mobilkrans, mit einem Unterwagen 2 und einem Oberwagen 3. Der Unterwagen 2 weist eine Fahrerkabine 4 und sechs Achsen 5 mit jeweils zwei straßentauglichen und gummibereiften Rädern 6 auf. Der Unterwagen 2 kann selbstverständlich mehr oder weniger als sechs Fahrzeugachsen 5 oder alternativ ein Raupenfahrwerk aufweisen. Auf dem Unterwagen 2 ist der Oberwagen 3 um eine vertikal ausgerichtete Drehachse D schwenkbar gelagert. Oberwagen 3 und Unterwagen 2 können alternativ auch starr aufeinander montiert sein. Auf dem um die horizontale Achse D schwenkbaren Oberwagen 3 ist ein Hauptausleger 7 angeordnet, welcher als Teleskopausleger konzipiert ist, angeordnet. Der Hauptausleger 7 umfasst einen Auslegergrundkasten 7a und mehrere ineinander geordnete und austeleskopierbare Teleskopschüsse 7b bis 7f. Der Auslegergrundkasten 7a ist durch einen Wippzylinder 8 aufrichtbar auf dem Oberwagen 3 gelagert, wodurch der Hauptausleger 7 nach vollständigem Einfahren der Teleskopschüsse 7b bis 7f in den Auslegergrundkasten 7a auf dem Unterwagen 2 für eine Straßenfahrt abgelegt werden kann.the figure 1 is a schematic side view of a mobile crane 1, in particular a mobile crane, with an undercarriage 2 and an uppercarriage 3. The undercarriage 2 has a driver's cab 4 and six axles 5, each with two roadworthy and rubber-tyred wheels 6. The undercarriage 2 can, of course, have more or fewer than six vehicle axles 5 or, alternatively, a crawler chassis. The upper carriage 3 is mounted pivotably about a vertically aligned axis of rotation D on the undercarriage 2 . Alternatively, the upper carriage 3 and the undercarriage 2 can also be mounted rigidly one on top of the other. On the pivotable about the horizontal axis D superstructure 3, a main boom 7 is arranged, which as Telescopic boom is designed arranged. The main boom 7 comprises a boom base box 7a and a plurality of telescope sections 7b to 7f which are arranged one inside the other and can be telescoped out. The boom base box 7a can be erected on the superstructure 3 by a luffing cylinder 8, whereby the main boom 7 can be placed on the undercarriage 2 for road travel after the telescopic sections 7b to 7f have been fully retracted into the boom base box 7a.

Des Weiteren ist an einem oberen Ende des fünften Teleskopschusses 7f und somit an einem Hauptauslegerkopf 7g eine wippbare als Gittermastträger konzipierte Hauptauslegerverlängerung 8 schwenkbar angebracht, die relativ zu dem Hauptausleger 7 um eine horizontale Wippachse W aufrichtbar ist. Hierbei ist die Wippachse W in üblicher Weise orthogonal zur Längsachse des Hauptauslegers 7 ausgerichtet. In üblicher Weise ist für den Wippvorgang der Hauptauslegerverlängerung 8 mindestens ein Wippseil 9 vorgesehen, das ausgehend von einer nicht dargestellten Winde, die im hinteren Bereich des Oberwagens 3 angeordnet ist, bis zu einer ersten Wippstütze 10a reicht und dort befestigt ist. In der weiteren Fortführung wird die Funktion des Wippseils 9 von Abspannstangen 16 übernommen, die in entsprechender Weise zwischen der ersten Wippstütze 10a und einer zweiten Wippstütze 10b sowie zwischen der zweiten Wippstütze 10b und in etwa der Mitte der Hauptauslegerverlängerung 8 befestigt sind. Die erste Wippstütze 10a und die zweite Wippstütze 10b sind in üblicher weise im Bereich des Hauptauslegerkopfs 7g um horizontale Achsen gelenkig gelagert und erstrecken sich nach hinten in Bezug auf den Hauptausleger 7 und v-förmig zueinander.Furthermore, at an upper end of the fifth telescopic section 7f and thus at a main boom head 7g, a luffing main boom extension 8 designed as a lattice mast carrier is pivotably attached, which can be erected about a horizontal luffing axis W relative to the main boom 7 . Here, the luffing axis W is aligned orthogonally to the longitudinal axis of the main boom 7 in the usual way. In the usual way, at least one luffing cable 9 is provided for the luffing process of the main boom extension 8, which extends from a winch, not shown, which is arranged in the rear area of the superstructure 3, to a first luffing support 10a and is fastened there. In the further development, the function of the luffing rope 9 is taken over by guy rods 16, which are fastened in a corresponding manner between the first luffing support 10a and a second luffing support 10b and between the second luffing support 10b and approximately the middle of the main boom extension 8. The first luffing support 10a and the second luffing support 10b are articulated about horizontal axes in the usual manner in the region of the main boom head 7g and extend rearwardly in relation to the main boom 7 and in a V-shape to one another.

Dieses mindestens eine Wippseil 9 ist zusätzlich über eine weitere erfindungsgemäße Abspannstütze 11 im Bereich des Hauptauslegers 7 abgespannt. Im vorliegenden Fall ist die Abspannstütze 11 etwa in der Mitte des Hauptauslegers 7 um eine horizontale Achse A schwenkbar und somit gelenkig angeordnet. Grundsätzlich kann die Abspannstütze 11 zwischen der Anlenkung des Wippzylinders 8 an dem Hauptausleger 7 und dem Hauptauslegerkopf 7g angeordnet werden. In statischer Hinsicht im Sinne einer Entlastung des Hauptauslegers 7 wird sich sicherlich ein mittlerer Bereich am Ende ergeben. Neben der gezeigten einzelnen Abspannstütze 11 können auch zwei oder mehr Abspannstützen 11 unter Abstand entlang der Rückseite des Hauptauslegers 7 angeordnet werden.This at least one luffing cable 9 is additionally braced via a further guy support 11 according to the invention in the area of the main boom 7 . In the present case, the guy support 11 is pivotable about a horizontal axis A approximately in the middle of the main boom 7 and is thus arranged in an articulated manner. In principle, the guy support 11 can be arranged between the articulation of the luffing cylinder 8 on the main boom 7 and the main boom head 7g. From a static point of view, in terms of relieving the main boom 7, there will certainly be a middle range at the end. In addition to the single guy support 11 shown, two or more guy supports 11 can also be arranged at a distance along the rear side of the main boom 7 .

Zusätzlich ist am Kopf beziehungsweise oberen Ende des Auslegergrundkastens 7a eine weitere Neben-Abspannstütze 12a befestigt, die sich ebenfalls ausgehend vom Auslegergrundkastens 7a in etwa rechtwinklig nach hinten erstreckt. Diese Neben-Abspannstütze 12a ist Bestandteil einer Hauptauslegerabspannung, die ein Neben-Abspannseil 12b umfasst. Das Abspannseil 12b ist von einem Fuß des Auslegergrundkastens 7a über die Neben-Abspannstütze 12a an den Hauptauslegerkopf 7g geführt. Die Neben-Abspannstütze 12a kann auch als ein in einer horizontalen Ebene v-förmig neben- und zueinander angeordnetes Paar von Abspannstützen ausgebildet sein. Auch diese zusätzliche Neben-Abspannung 12a, 12b dient der Aussteifung des Hauptauslegers 7.In addition, another secondary guy support 12a is fastened to the head or upper end of the boom base box 7a, which also extends approximately at right angles to the rear, starting from the boom base box 7a. This secondary guy support 12a is part of a main boom guying, which includes a secondary guy cable 12b. The guy rope 12b is guided from a foot of the boom base box 7a via the auxiliary guy support 12a to the main boom head 7g. The secondary guy support 12a can also be designed as a pair of guy supports arranged next to one another in a V-shape in a horizontal plane. This additional secondary guying 12a, 12b also serves to stiffen the main boom 7.

In den Figuren 2a bis 2c ist jeweils eine Teilansicht des Hauptauslegers 7 des Fahrzeugkrans 1 gemäß Figur 1 gezeigt, wobei die Abspannstütze 11 jeweils in einer von drei Stellungen dargestellt ist. Die Hauptauslegerverlängerung 8 ist zur besseren Darstellung der Abspannstütze 11 weggelassen. Da die Figur 1 zum größten Teil identisch mit den Figuren 2a bis 2c ist, wird in den folgenden Absätzen nur auf die Unterschiede zwischen den einzelnen Figuren im Bereich der Abspannstütze 11 eingegangen.In the Figures 2a to 2c FIG. 12 is a partial view of the main boom 7 of the mobile crane 1 according to FIG figure 1 shown, wherein the guy support 11 is shown in one of three positions. The main boom extension 8 has been left out to show the guy support 11 better. Since the figure 1 for the most part identical to the Figures 2a to 2c is, only the differences between the individual figures in the area of the guy support 11 will be discussed in the following paragraphs.

Die Figur 2a zeigt die zweite Abspannstütze 15 in einer am Hauptausleger 8 nicht aufgerichteten, angeklappten, nahezu am Hauptausleger 7 anliegenden Ruhestellung beziehungsweise Transportstellung. Die Teleskopschüsse 7b, 7c, 7e und 7f sind vollständig beziehungsweise weit ausgefahren und der dritte Teleskopschuss 7d nur teilweise (etwa 10 %). Der dritte Teleskopschuss 7d ist nur soweit austeleskopiert, dass sich ein Aufrichteseil 14 spannt, sich die Abspannstütze 11 von der am Hauptausleger 7 anliegenden Ruhestellung aber noch nicht wegbewegt. Das Aufrichteseil 14 ist an einem Ende an einem oberen Ende des dritten Teleskopschusses 7d befestigt und an dem anderen Ende an der Abspannstütze 11 im Bereich ihres freien Endes 11a an einer Konsole 11b, insbesondere einer Vorbaukonsole, befestigt. Um die Aufrichtekräfte besser in die Abspannstütze 11 einleiten zu können, ist die Konsole 11b rechtwinklig an der Abspannstütze 11 und nach hinten ragend angeordnet, an dessen freien Ende das Aufrichteseil 14 angreift. Des Weiteren ist aus der Figur 2a ersichtlich, dass das freie Ende 11a der Abspannstütze 11 eine Umlenkrolle 11c drehbar gelagert trägt, die mit dem Wippseil 9 in der Betriebsstellung im Eingriff steht (siehe Figur 2c). Das Aufrichteseil 19 kann selbstverständlich auch an einem Kopf eines anderen Teleskopschusses 7e oder 7f befestigt sein.the Figure 2a shows the second guy support 15 in a rest position or transport position which is not erected on the main boom 8 but folded in and almost resting on the main boom 7 . The telescopic sections 7b, 7c, 7e and 7f are fully or far extended and the third telescopic section 7d only partially (about 10%). The third telescopic section 7d is only telescoped out so far that a righting rope 14 is tightened, but the guy support 11 has not yet moved away from the rest position resting against the main boom 7 . The righting rope 14 is attached at one end to an upper end of the third telescopic section 7d and at the other end to the guy support 11 in the region of its free end 11a on a console 11b, in particular a front-end console. In order to be able to better introduce the righting forces into the guy support 11, the console 11b is arranged at right angles to the guy support 11 and protrudes backwards, and the righting rope 14 acts on the free end of the console. Furthermore, from the Figure 2a It can be seen that the free end 11a of the guy support 11 rotatably carries a deflection pulley 11c which is in engagement with the luffing cable 9 in the operating position (see Figure 2c ). The righting rope 19 can of course also be attached to a head of another telescopic section 7e or 7f.

Ein Sicherheitsseil 15 hängt ohne Spannung zwischen dem freien Ende 11a der Abspannstütze 11, der zweiten Abspannstütze 15 und dem Kopf des ersten Teleskopschusses 7a herunter. Selbstverständlich kann das Sicherheitsseil 15 auch an dem Kopf eines anderen Teleskopschusses 7b bis 7f - je nach Anbauort der Abspannstütze 11 - an dem Kopf des Auslegergrundkastens 7a oder am Oberwagen 3 montiert sein. Die Funktion des Sicherheitsseils 15 liegt darin ein Nach-oben-Wegklappen der Abspannstütze 11 zu verhindern. In der hier gezeigten Ruhestellung besteht kein Kontakt der Umlenkrolle 11c mit dem Wippseil 9. Das Wippseil 9 führt somit vom Oberwagen 3 bis zur ersten Wippstütze 10 ohne Umlenkung.A safety rope 15 hangs without tension between the free end 11a of the guy support 11, the second guy support 15 and the head of the first telescopic section 7a. Of course, the safety rope 15 can also be mounted on the head of another telescopic section 7b to 7f--depending on where the guy support 11 is installed--on the head of the boom base box 7a or on the superstructure 3. The function of the safety rope 15 is to prevent the guy support 11 from folding away upwards. In the rest position shown here, there is no contact between the deflection roller 11c and the luffing cable 9. The luffing cable 9 thus leads from the superstructure 3 to the first luffing support 10 without deflection.

In der Figur 2b, die eine weitere Teilansicht von Figur 1 zeigt, ist die Abspannstütze 11 in einer Zwischenstellung, d.h. zwischen der Ruhestellung und einer Betriebsstellung. Die Teleskopschüsse 7b und 7f des Hauptauslegers 8 sind vollständig ausgefahren, der zweite Teleskopschuss 7c etwa zu 90 %, der dritte Teleskopausschuss 7d etwa zu 20 % und der vierte Teleskopausschuss 7e etwa zu 45 %. Der dritte Teleskopschuss 7d ist im Vergleich zu der Figur 2a weiter austeleskopiert, so dass das Aufrichteseil 14 die Abspannstütze 11 aus ihrer abgelegten Ruhestellung heraus anhebt beziehungsweise hochzieht und die Umlenkrolle 11 in einen ersten Kontakt mit dem Wippseil 9 kommt und in dieses einfädelt. Das Sicherheitsseil 15 ist in dieser Zwischenstellung der Abspannstütze 11 immer noch nicht gespannt. In der Figur 2b wird das Wippseil 9 noch nicht von der Umlenkrolle 11c umgelenkt. Es besteht lediglich ein erster Kontakt zwischen dem eine Abspannung bildenden Wippseil 9 und Umlenkrolle 11c.In the Figure 2b , which is another partial view of figure 1 shows, the guy support 11 is in an intermediate position, ie between the rest position and an operating position. The telescopic sections 7b and 7f of the main boom 8 are fully extended, the second telescopic section 7c approximately 90%, the third telescopic section 7d approximately 20% and the fourth telescopic section 7e approximately 45%. The third telescopic shot 7d is compared to that Figure 2a further telescoped out, so that the righting rope 14 raises or pulls up the guy support 11 from its stored rest position and the deflection roller 11 comes into first contact with the luffing rope 9 and threads it into it. The safety rope 15 is still not tensioned in this intermediate position of the guy support 11 . In the Figure 2b the luffing cable 9 is not yet deflected by the deflection pulley 11c. There is only a first contact between the seesaw cable 9, which forms a guying, and the deflection roller 11c.

Die Figur 2c zeigt eine weitere Teilansicht von Figur 1, in der die Abspannstütze 11 in der aufgerichteten Betriebsstellung dargestellt ist. Ein Winkel zwischen der Abspannstütze 11 und dem zweiten Teleskopschuss 7c beträgt etwa 75 bis 90 Grad, vorzugsweise 80 Grad, damit unter Einwirkung der Umlenkkraft aus dem Wippseil 9 die Abspannstütze 11 auch beim Einteleskopieren von Teleskopschuss 7d selbstständig für den Transport in den Ruhezustand zurückkehrt. Die Teleskopschüsse 7b und 7c des Hauptauslegers 8 sind etwa zu 90 % ausgefahren und die Teleskopausschüsse 7d bis 7f etwa zu 45 %. Dadurch, dass der zweite und dritte Teleskopausschuss 7c, 7d jeweils nicht vollständig ausgefahren sind, kann die Spannung in dem Aufrichteseil 14 und dem Sicherheitsseil 15 eingestellt werden. Die Abspannstütze 11 greift mit ihrer Umlenkrolle 11c in das Wippseil 9 ein und lenkt das Wippseil 9 über die Umlenkrolle 11c aus. In dieser Betriebsstellung der Abspannstütze 11 wird der Hauptausleger 7 zusätzlich zur Neben-Abspannung 12a, 12b abgespannt beziehungsweise stabilisiert. Eine Verformung des Hauptauslegers 7 in Ladungsaufnahmerichtung sowie große Verbiegungen des Hauptauslegers 7 können hierdurch reduziert werden.the Figure 2c shows another partial view of figure 1 , in which the guy support 11 is shown in the upright operating position. An angle between the guy support 11 and the second telescopic section 7c is about 75 to 90 degrees, preferably 80 degrees, so that under the action of the deflection force from the luffing cable 9, the guy support 11 automatically returns to the idle state for transport even when telescoping telescopic section 7d. The telescopic sections 7b and 7c of the main boom 8 are about 90% extended and the telescopic committees 7d to 7f about 45%. Because the second and third telescopic committee 7c, 7d are each not fully extended, the tension in the righting rope 14 and the safety rope 15 can be adjusted. The guy support 11 engages in the luffing cable 9 with its deflection pulley 11c and deflects the luffing cable 9 via the deflection pulley 11c. In this operating position of the guy support 11, the main boom 7 is braced or stabilized in addition to the secondary guying 12a, 12b. Deformation of the main boom 7 in the direction of loading and large deflections of the main boom 7 can be reduced as a result.

In dem vorliegenden Ausführungsbeispiel ist die Erfindung anhand eines Mobilkrans mit einem Teleskopausleger beschrieben. Es ist selbstverständlich, dass das Prinzip der vorliegenden Erfindung auch für Gittermastausleger oder Klappausleger (faltbarer Ausleger in Gittermast- oder Kastenausführung) anwendbar ist und auch für Raupenkrane. Alternativ kann die Abspannstütze über mindestens einen hydraulischen Aufrichtezylinder in Betriebsposition gebracht wird. Bei dieser Alternative wäre ein Winkel von etwa 90 Grad zwischen Hauptausleger 7 und Abspannstütze 11 bevorzugt.In the present exemplary embodiment, the invention is described using a mobile crane with a telescopic boom. It goes without saying that the principle of the present invention is also applicable to lattice booms or folding jibs (lattice boom or box-type foldable boom), and also to crawler cranes. Alternatively, the guy support can be brought into the operating position via at least one hydraulic righting cylinder. In this alternative, an angle of about 90 degrees between the main boom 7 and guy support 11 would be preferred.

Im Zusammenhang mit dem vorliegenden Ausführungsbeispiel ist es auch denkbar, dass für den Fall, dass Fahrzeugkran 1 einen Hauptausleger 7 als Teleskopausleger mit einem Auslegergrundkasten 7a und mehreren Teleskopschüssen 7b bis 7f aufweist, die mindestens eine Abspannstütze 11 an dem Hauptausleger 7 zwischen dem Auslegergrundkasten 7a und dem innersten Teleskopschuss 7f angeordnet ist. Vorzugsweise sollte die mindestens eine Abspannstütze 11 an dem Hauptausleger 7 im Bereich der mittleren drei (bei ungerader Gesamtanzahl des Auslegergrundkastens 7a und der Teleskopschüsse 7b bis 7f), vorzugsweise zwei (bei gerader Gesamtanzahl des Auslegergrundkastens 7a und der Teleskopschüsse 7b bis 7f), besonders vorzugsweise des einem mittleren, Teleskopschusses 7c, 7d (bei ungerader Gesamtanzahl des Auslegergrundkastens 7a und der Teleskopschüsse 7b bis 7f), angeordnet ist.In connection with the present exemplary embodiment, it is also conceivable that if mobile crane 1 has a main boom 7 as a telescopic boom with a boom base box 7a and several telescopic sections 7b to 7f, the at least one guy support 11 on the main boom 7 between the boom base box 7a and the innermost telescopic section 7f is arranged. Preferably, the at least one guy support 11 on the main boom 7 should be in the middle three (if the total number of boom base box 7a and telescopic sections 7b to 7f is odd), preferably two (if the total number of boom base box 7a and telescopic sections 7b to 7f is even), particularly preferably of a central telescopic section 7c, 7d (if the total number of boom base boxes 7a and telescopic sections 7b to 7f is odd) is arranged.

Ist der Fahrzeugkran 1 mit einem Hauptausleger 7 als Teleskopausleger mit einem Auslegergrundkasten 7a und mehreren Teleskopschüssen 7b bis 7f ausgerüstet, der Hauptausleger 7 über an einem am Auslegergrundkasten 7a angelenkten Wippzylinder 13 wippbar, so ist die mindestens eine Abspannstütze 11 an dem Hauptausleger 7 zwischen einer Anlenkung des Wippzylinders 13 an dem Auslegergrundkasten 7a und dem innersten Teleskopschuss 7f angeordnet ist.If the mobile crane 1 is equipped with a main boom 7 as a telescopic boom with a boom base box 7a and several telescopic sections 7b to 7f, the main boom 7 can be luffed via a luffing cylinder 13 articulated on the boom base box 7a, then the at least one guy support 11 is on the Main boom 7 is arranged between a linkage of the luffing cylinder 13 on the boom base box 7a and the innermost telescopic section 7f.

BezugszeichenlisteReference List

  • 1 Fahrzeugkran1 mobile crane
  • 2 Unterwagen2 undercarriages
  • 3 Oberwagen3 superstructures
  • 4 Fahrerkabine4 driver's cabin
  • 5 Achsen5 axes
  • 6 Reifen6 tires
  • 7 Hauptausleger7 main boom
  • 7a Auslegergrundkasten7a Outrigger base box
  • 7b erster Teleskopschuss7b first telescopic shot
  • 7c zweiter Teleskopschuss7c second telescopic shot
  • 7d dritter Teleskopschuss7d third telescopic shot
  • 7e vierter Teleskopschuss7e fourth telescopic shot
  • 7f fünfter Teleskopschuss7f fifth telescope shot
  • 7g Hauptauslegerkopf7g main boom head
  • 8 Hauptauslegerverlängerung8 main boom extension
  • 9 Wippseil9 seesaw rope
  • 10a erste Wippstütze10a first rocker support
  • 10b zweite Wippstütze10b second rocker support
  • 11 Abspannstütze11 guy support
  • 11a Ende der Abspannstütze11a End of guy support
  • 11b Konsole11b console
  • 11c Umlenkrolle11c pulley
  • 12a Neben-Abspannstütze12a Secondary guy support
  • 12b Neben-Abspannseil12b secondary guy rope
  • 13 Wippzylinder13 luffing cylinder
  • 14 Aufrichteseil14 righting rope
  • 15 Sicherheitsseil15 safety rope
  • 16 Abspannstangen16 guy rods
  • 17 Adapter17 adaptors
  • A Drehachse der Abspannstütze 11A Axis of rotation of the guy support 11
  • D DrehachseD axis of rotation
  • W WippachseW rocking axis

Claims (12)

  1. Vehicle crane (1), in particular a mobile crane, with a main jib (7) and a main jib extension (8) mounted thereon and being luffable by means of at least one luffing cable (9), wherein the main jib (7) is designed as a telescoping jib with a jib basic box (7a) and a plurality of telescoping sections (7b to 7f) and the main jib (7) is mounted on a superstructure (3) of the vehicle crane (1) in such a manner as to be able to be raised, wherein the luffing cable (9), starting from a winch on the vehicle crane (1), is guided by means of at least one guying support (11) and at least one luffing support (10a, 10b) in the region of a main jib head (7g) and is fastened at that location, characterised in that the winch is disposed in a rear region of the superstructure (3), the at least one guying support (11) is disposed on the main jib (7) between the jib basic box (7a) and the innermost telescoping section (7f) and deflects the luffing cable (9) in order to guy the main jib (7) and alternatively the luffing cable (9) is guided by the luffing support (10a, 10b) further as far as the main jib extension (9) and is fastened at that location.
  2. Vehicle crane (1) as claimed in claim 1, characterised in that the at least one guying support (11) is disposed on the main jib (7) in the region of the middle three, preferably two, particularly preferably the one middle, telescoping section(s) (7c, 7d).
  3. Vehicle crane (1) as claimed in claim 1 or 2, characterised in that a deflection roller (11c) is mounted on a free end (11a) of the guying support (11), the luffing cable (9) being guided over this deflection roller.
  4. Vehicle crane (1) as claimed in at least one of claims 1 to 3, characterised in that at least a part of the luffing cable (9) is replaced by guying rods, belts, chains or other flexible components with a high level of tensile strength.
  5. Vehicle crane (1) as claimed in at least one of claims 1 to 4, characterised in that the guying support (11) is disposed so as to be pivotable about a horizontal axis (A) on the main jib (7) and the guying support (11) can be raised from an inoperative position into an operating position.
  6. Vehicle crane (1) as claimed in at least one of claims 1 to 5, characterised in that the guying support (11) in the operating position forms an angle with respect to the main jib (7) in the range of 75 to 90 degrees, preferably 80 degrees.
  7. Vehicle crane (1) as claimed in claim 5 or 6, characterised in that the main jib (7) is designed as a telescoping jib and the guying support (11) can be raised by means of an extension movement of the telescoping jib out of the inoperative position into the operating position.
  8. Vehicle crane (1) as claimed in claim 7, characterised in that the guying support (11) is disposed on a head of the telescoping section (7b to 7f) of the telescoping jib.
  9. Vehicle crane (1) as claimed in claim 7 or 8, characterised in that the guying support (11) can be raised by means of a raising cable (14) which engages at the end (11a) of the guying support (11) by means of a bracket (11b) on the guying support (11) and is connected to a head of a telescoping section (7d, 7e, 7f) above the guying support (11).
  10. Vehicle crane (1) as claimed in at least one of claims 7 to 9, characterised in that a safety cable (15) defines maximum raising of the guying support (11) and the safety cable (15) engages at the end (11a) of the guying support (11) and is connected to a head of a telescoping section (7d, 7e, 7f) below the guying support (11).
  11. Vehicle crane (1) as claimed in at least one of claims 7 to 10, characterised in that a plurality of guying supports (11) are disposed on different heads of telescoping sections (7b to 7f) of the telescoping jib.
  12. Vehicle crane (1) as claimed in at least one of claims 1 to 11, characterised in that the length of the guying support (11) can be variably adjusted.
EP19736696.6A 2018-07-09 2019-07-05 Support for the rear anchoring line of a telescopic crane Active EP3793930B1 (en)

Applications Claiming Priority (2)

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DE102018116575.7A DE102018116575A1 (en) 2018-07-09 2018-07-09 Support for the rear guy line of a telescopic crane
PCT/EP2019/068062 WO2020011657A1 (en) 2018-07-09 2019-07-05 Support for the rear anchoring line of a telescopic crane

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EP3793930A1 EP3793930A1 (en) 2021-03-24
EP3793930B1 true EP3793930B1 (en) 2022-10-05

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US (1) US11465887B2 (en)
EP (1) EP3793930B1 (en)
JP (1) JP2021533051A (en)
DE (1) DE102018116575A1 (en)
WO (1) WO2020011657A1 (en)

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DE102020134714B4 (en) 2020-12-22 2023-09-28 Tadano Demag Gmbh Mobile crane with a luffing main boom and an additional boom system

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WO2020011657A1 (en) 2020-01-16
EP3793930A1 (en) 2021-03-24
US20210179398A1 (en) 2021-06-17
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DE102018116575A1 (en) 2020-01-09
US11465887B2 (en) 2022-10-11

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