EP0583552B1 - Teleskopausleger für Fahrzeugkrane o. dgl. - Google Patents

Teleskopausleger für Fahrzeugkrane o. dgl. Download PDF

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Publication number
EP0583552B1
EP0583552B1 EP93107395A EP93107395A EP0583552B1 EP 0583552 B1 EP0583552 B1 EP 0583552B1 EP 93107395 A EP93107395 A EP 93107395A EP 93107395 A EP93107395 A EP 93107395A EP 0583552 B1 EP0583552 B1 EP 0583552B1
Authority
EP
European Patent Office
Prior art keywords
tele
section
sections
telescopic
profile
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.)
Revoked
Application number
EP93107395A
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German (de)
English (en)
French (fr)
Other versions
EP0583552A1 (de
Inventor
Rudolf Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Ehingen GmbH
Original Assignee
Liebherr Werk Ehingen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Liebherr Werk Ehingen GmbH filed Critical Liebherr Werk Ehingen GmbH
Publication of EP0583552A1 publication Critical patent/EP0583552A1/de
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • 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
    • B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs

Definitions

  • the invention relates to a telescopic boom for mobile cranes or the like, consisting of an outer link piece pivotally mounted on the vehicle or its superstructure, in which a plurality of telescopically collapsible and extendable telescopic sections are held, each section being provided with bearings for the section guided therein and can be locked with this shot and a hydraulic pressure medium piston-cylinder unit is provided for extending and retracting the individual shots.
  • the individual telescopic sections have an essentially box-like profile, the lower straps of the individual sections having flat V-shaped profiles or flat channel-shaped profiles, which are formed by a flat middle one Web part angled legs are formed. These lower straps are welded to the edge regions of the legs of U-shaped profiled parts with rounded corner regions between their web parts and legs to form box-shaped profiles, in the area of the welded connections additionally bracing strut-like sheets can be welded.
  • the individual telescopic sections are mounted one inside the other on the trough-shaped lower chords according to the pressure distribution ratio known from DE-PS 21 48 966, the bearing forces being transmitted in the region of the upper rounded corners of the box profiles by rollers or appropriately shaped bearing shoes.
  • bulge stiffeners with U-shaped profiles are welded onto the inside or outside of the legs of the profile.
  • the lower flange which is mainly subjected to bending forces, is stiffened by its V-shape or the two longitudinal bends that form the channel shape and secured against dents.
  • Telescopic boom in spite of the welded-in buckling stiffeners and the buckling lines, is not only sensitive to dents, it can also be produced only with increased effort because of its complicated cross-sectional shape. Telescopic booms are not only subjected to bending, but also to torsion.
  • the bearing elements arranged in the lower flange with a channel-shaped or V-shaped cross section counteract rotation.
  • the object of the invention is to provide a telescopic boom of the type specified, which is characterized by a simple and economically producible construction with great bending stiffness of its individual shots.
  • this object is achieved in a telescopic boom of the generic type in that the articulation piece and the wefts consist of profiles forming shells, each of which has a lower, approximately round and an upper, semi-box-shaped part in the horizontal (pivoted onto the vehicle) position, the part of which opposed legs are welded together, and that each shell with an approximately round profile consists of tires bent relative to each other, of which successive each include obtuse angles.
  • articulation pieces and shots have been described which have at least one lower shell with a round profile and which are the subject of European patent application 92 102 268.7.
  • Such round profiles not only have favorable moments of inertia and resistance, so that they have great flexural rigidity, they also provide great security against dents due to their round cross section, so that additional measures to protect against dents can be dispensed with.
  • the formation of the shells with an approximately round profile by multiple folds has the additional advantage that an even better buckling stiffness can be achieved compared to a continuous rounding.
  • the lower profile part expediently has approximately the shape of a half ellipse with a vertex formed by the smaller radius.
  • the legs of the upper profile part can be at right angles to the straight web part forming the upper chord or can also enclose an obtuse or acute angle with it.
  • the outer link 1 of the telescopic boom 2 is provided with a hinge piece 3, via the this is articulated on the superstructure of a crane, crane vehicle or the like.
  • the piston rod of a hydraulic piston-cylinder unit 5 is articulated in the joint 4 on the part enclosed by the outer articulation piece 1.
  • a square profile 6 is articulated in a torsion-proof manner above it on the boom link piece 4.
  • the articulation piece and the further telescopic shots are provided in the region of their ends with collar-like stiffeners 8-10, on which pressure medium piston cylinder units provided with locking bolts are arranged.
  • the innermost telescopic shot is, as can be seen from Fig. 1, provided at its outer end with a roller head.
  • FIG. 2 shows an enlarged cross section through the collapsed shots of the telescopic boom.
  • the inner sections 12, 13, 14, which have elliptical shapes, can be telescoped out of the outer bracket articulation piece 1, which in the exemplary embodiment shown has a circular cross section, the ratio of their long to their short axes increasing from outside to inside.
  • crescent-shaped spaces 16 are formed between the side walls of the telescopic sections, in each of which profile boxes 17 with longitudinal slots for caterpillar-like chains (not shown) can be arranged, which serve to guide and hold supply lines, for example hydraulic and electrical lines.
  • the long axes of the elliptical profiles are reduced from shot to shot by approximately the same and relatively small amounts, so that the bending stiffness of the Shots only decrease by smaller amounts from shot to shot, since the area moment of inertia determining the bending stiffness is essentially determined by the long axes.
  • the piston rod of the single-stage hydraulic cylinder 18 is articulated on the lower mounting frame 3 of the boom link piece 1 in FIG. 1.
  • the hydraulic cylinder is provided in the region of its outlet end of the piston rod with a collar-like widening 19 from which the locking bolts 20 can be extended. These locking bolts move into receptacles 21 which are provided on each telescopic shot.
  • FIGS. 1-3 and the associated description of the utility model G 19 13 210.6 for a more detailed embodiment of this arrangement, reference is made to FIGS. 1-3 and the associated description of the utility model G 19 13 210.6.
  • the box section 6 is pivotally but non-rotatably articulated on the lower mounting frame 3 of the boom link piece 1.
  • the individual telescopic shots 12-15 are provided with slide bearings 24, which are arranged on all lower telescopic shots at their lower frame ends.
  • the box section 6 is guided in these slide bearings.
  • the slide bearings 24 have only a relatively small axial length, so that they are close together in the axial direction when the telescopic sections are inserted.
  • bearings formed from individual bearing segments instead of bearings formed from individual bearing segments, continuous all-round bearings can also be provided.
  • An all-round bearing arrangement is arranged on the inside of the end-side collar 27 that closes off the individual shots. Further bearings are located on the inner frame end of each telescoped shot, as can be seen from FIGS. 8 and 9.
  • hydraulic cylinders 28, 29 are arranged on opposite sides of the upper half of each stiffening collar, the pistons 30, 31 of which form or carry locking bolts.
  • the individual telescopic shots are provided in a known manner with holes for the locking bolts 30, 31.
  • FIG. 5 shows a cross section through the round profiles of the telescopic shots.
  • All telescopic shots could also consist of round profiles in the manner shown in FIG. 6. These round profiles have the disadvantage compared to the elliptical profiles according to FIG. 5 that larger diameter gradations, which greatly reduce the bending stiffness, would have to be provided if supply lines are to be arranged in the annular spaces between the individual sections.
  • the individual shots can be stored one inside the other with almost no play, which is advantageous for the operation of the crane.
  • This anti-rotation profile is expediently a large-volume square tube or triangular tube, which has a large, polar moment of inertia, so that the remaining torsional elasticity is negligible.
  • a square tube any other shape can also be selected, for example a triangular or hexagonal tube.
  • Shots consisting of round tubes can be inexpensively manufactured in a known manner.
  • the elliptical cross sections can also be produced in a simple manner, for example, in that a round tube is then laterally pressed by hydraulic presses in such a way that the desired elliptical shape is produced.
  • the diameters of the wefts are reduced comparatively strongly if sufficiently large annular spaces are to be created for the arrangement of supply lines. This distance can be reduced to a favorable ratio, if external cable drums are used, which, however, must be additionally protected against the weather.
  • the plastic bearing for the elliptical cross sections of the wefts can be produced, for example, by copy milling. Circular bearings are easier to produce by turning. The bearings can also be poured into molds or pressed.
  • the elliptical design of the individual shots also has the advantage that the buckling radius is smaller in the highly stressed lower and upper pressure areas and thus the buckling safety is greater.
  • the larger buckling radius is in the middle more neutral load zones.
  • both the boom articulation piece and the shots that can be telescoped from it can have similar elliptical profiles, so that elliptical annular spaces with the same width over their entire circumference are formed between the individual shots.
  • the individual shots are now axially displaceable in one another by bearings of the type shown in FIGS. 3, 8 and 9, the required torsional rigidity is already ensured, so that the box section serving as a guide can be dispensed with. Due to the given non-rotatable guidance of the individual shots into one another, it is also possible to dispense with locking the individual shots to one another in such an embodiment.
  • FIG. 12 shows the cross section through a telescopic section or an outer link of a telescopic boom, which consists of a lower semi-elliptical profile part 40 and an upper one there is a semi-box-shaped profile part 41, the legs of which are welded to one another in a horizontal parting plane by welds 42, 43.
  • the legs 44, 45 of the upper half-box-shaped profile part are connected to the upper web part 46 by curved regions 47, 48 with the bending radius RL.
  • the lower profile part 40 is formed by a shell with a semi-elliptical cross-section, the profile shape being able to be described by the three radii ri, Rmi and Ri with close approximation to an ellipse.
  • a simplification can be made if the cross-sectional shape is defined only by the two radii ri and Rmi.
  • the shape of the ellipse changes only slightly as a result of the simplifications described in the production, although from a static point of view these can even be favorable under certain circumstances. This is because the area of the bulge-resistant shell with the radius ri or the angle Ey2 becomes larger and the radius Rmi can be guided almost to the middle of the profile. This eliminates the larger and therefore less dent-proof area with the radius Ri. As a result, the lower shell 40 is overall more rigid, since the buckling security decreases linearly with the increase in the radii.
  • the profile acc. Fig. 13 differs from that of FIG. 12 only in that the upper profile shell 41 'has semi-box-shaped profile legs 44' and 45 ', which form obtuse angles with the web part 46'.
  • the profile acc. 14 has an upper shell 41 ′′ consisting of a semi-box-shaped profile, the profile legs 44 ′′ and 45 ′′ of which form acute angles with the web part 46 ′′.
  • the constructive center between the dimensions H1 and H2 is the center of the profile.
  • the lower part has the shape of a half ellipse, which is simultaneously forms the lower structural profile shell.
  • the lower part can be extended upwards by dimension V, which means that dimension H2 of the upper shell is shortened accordingly.
  • the compressive stress (-) is often the most critical stress for thin-walled hollow profiles due to the risk of buckling.
  • the greatest bending compressive stress arises from the main load of the boom around the axis X-X (X direction) in the lower vertex of the radius ri. This is according to the three profiles. the figures 12 to 14 the same.
  • the lateral stress curve is highest in the middle of the profile, as a result of which an increase in the compressive stress compared to the profile according to FIG. 12 occurs in this area.
  • the radius Ri continues upward beyond the center of the profile, the buckling stiffness is thereby improved, so that this is not disadvantageous.
  • the lateral stress curve has the highest value at the point at which the radius RL begins. Since the curvature by the radius R has already ended below the center of the profile, the flat profile side, which is not stiff against bulging, is larger and also shifted downwards. This area receives higher compressive stresses due to these influences. The less favorable buckling behavior may have to be compensated for by appropriate measures (larger sheet thickness or buckling stiffener).
  • the profile shapes correspond the profile shape described with reference to FIGS. 12e to 12h, but with the difference that the approximately semi-elliptical lower shells are formed by successive folds of the blanks.
  • Fig. 15 is a table in which the appropriate dimensions and angles of the individual profiles are given.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP93107395A 1992-08-14 1993-05-06 Teleskopausleger für Fahrzeugkrane o. dgl. Revoked EP0583552B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9210902U 1992-08-14
DE9210902U DE9210902U1 (de) 1992-08-14 1992-08-14 Teleskopausleger für Fahrzeugkrane o.dgl.

Publications (2)

Publication Number Publication Date
EP0583552A1 EP0583552A1 (de) 1994-02-23
EP0583552B1 true EP0583552B1 (de) 1995-08-30

Family

ID=6882672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107395A Revoked EP0583552B1 (de) 1992-08-14 1993-05-06 Teleskopausleger für Fahrzeugkrane o. dgl.

Country Status (4)

Country Link
EP (1) EP0583552B1 (es)
AT (1) ATE127096T1 (es)
BE (1) BE1005624A7 (es)
DE (2) DE9210902U1 (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19711975A1 (de) * 1997-03-12 1998-09-17 Mannesmann Ag Teleskopausleger für Fahrzeugkrane
WO2009029965A1 (de) 2007-09-05 2009-03-12 Palfinger Ag Profilform für einen kranarm
RU175228U1 (ru) * 2017-07-14 2017-11-28 Акционерное общество "Галичский автокрановый завод" Стрела подъёмного крана

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9308993U1 (de) * 1993-06-16 1993-08-12 Ec Engineering + Consulting Spezialmaschinen Gmbh, 89079 Ulm Teleskopierbarer Ausleger
DE9402692U1 (de) * 1994-02-18 1994-04-14 Ec Engineering + Consulting Spezialmaschinen Gmbh, 89079 Ulm Auslegerprofil
DE19608210C1 (de) * 1996-03-04 1997-10-09 Kidde Ind Inc Vorrichtung zur Führung eines Teleskopteils für einen Teleskop-Ausleger
DE19624312C2 (de) * 1996-06-18 2000-05-31 Grove Us Llc Teleskopausleger für Fahrzeugkrane
FR2790538B1 (fr) * 1999-03-02 2001-05-25 Ppm Structure de poutre en caisson creux, poutre en faisant application et fleche telescopique la mettant en oeuvre
EP2185461B1 (de) * 2007-09-05 2013-01-30 Palfinger AG Profilform für einen kranarm
MX2010002600A (es) * 2007-09-05 2010-03-31 Palfinger Ag Forma de perfil para un brazo de grua.
BRPI0816409A2 (pt) * 2007-09-05 2015-03-03 Palfinger Ag Formato de perfil para uma lança de guindaste.
JP2010089919A (ja) * 2008-01-09 2010-04-22 Kobelco Cranes Co Ltd 伸縮ブーム
CA2705954C (en) * 2009-06-04 2019-05-07 Steven Clare Dawson Telescopic composite cylinder hydraulic hoist
US9290363B2 (en) * 2011-07-21 2016-03-22 Manitowoc Crane Companies, Llc Tailor welded panel beam for construction machine and method of manufacturing
SI26016B (sl) 2020-06-19 2024-05-31 Tajfun Liv, Proizvodnja In Razvoj D.O.O. Nosilni sklop teleskopskega kraka pri mobilnem hidravličnem dvigalu in mobilno hidravlično dvigalo, obsegajoče tovrsten sklop

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281651C2 (de) * 1966-06-30 1975-02-13 Leo Gottwald KG, 4000 Düsseldorf Teleskopartig ein- und ausfahrbarer kranausleger
JPS4836028B1 (es) * 1969-08-21 1973-11-01
US4038794A (en) * 1975-10-28 1977-08-02 The Warner & Swasey Company Boom assembly
DE3015599A1 (de) * 1980-04-23 1981-10-29 Peter Dipl.-Ing. Dr. 4000 Düsseldorf Eiler Teleskopierbarer kranausleger
US4478014A (en) * 1981-12-14 1984-10-23 Fmc Corporation Telescopic boom with angled corner construction
DE4018222A1 (de) * 1990-06-07 1991-12-12 Krupp Industrietech Teleskopausleger mit kupplungsvorrichtung fuer ausschiebeanordnung
DE9013210U1 (de) * 1990-09-18 1991-01-03 Liebherr-Werk Ehingen Gmbh, 7930 Ehingen Teleskopiersystem mit verringerter Knicklänge des Teleskopierzylinders
DE9113981U1 (de) * 1991-11-11 1992-04-02 Liebherr-Werk Ehingen Gmbh, 7930 Ehingen Teleskopausleger für Fahrzeugkrane o.dgl.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19711975A1 (de) * 1997-03-12 1998-09-17 Mannesmann Ag Teleskopausleger für Fahrzeugkrane
DE19711975B4 (de) * 1997-03-12 2006-09-07 Terex-Demag Gmbh & Co. Kg Teleskopausleger für Fahrzeugkrane
WO2009029965A1 (de) 2007-09-05 2009-03-12 Palfinger Ag Profilform für einen kranarm
RU175228U1 (ru) * 2017-07-14 2017-11-28 Акционерное общество "Галичский автокрановый завод" Стрела подъёмного крана

Also Published As

Publication number Publication date
BE1005624A7 (fr) 1993-11-23
EP0583552A1 (de) 1994-02-23
DE9210902U1 (de) 1992-12-24
DE59300531D1 (de) 1995-10-05
ATE127096T1 (de) 1995-09-15

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