EP3477018A1 - Hollow two point lever - Google Patents

Hollow two point lever Download PDF

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Publication number
EP3477018A1
EP3477018A1 EP18201908.3A EP18201908A EP3477018A1 EP 3477018 A1 EP3477018 A1 EP 3477018A1 EP 18201908 A EP18201908 A EP 18201908A EP 3477018 A1 EP3477018 A1 EP 3477018A1
Authority
EP
European Patent Office
Prior art keywords
cavity
lever
mast arm
point lever
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18201908.3A
Other languages
German (de)
French (fr)
Other versions
EP3477018B1 (en
Inventor
Thomas JASNIEWICZ
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Publication of EP3477018A1 publication Critical patent/EP3477018A1/en
Application granted granted Critical
Publication of EP3477018B1 publication Critical patent/EP3477018B1/en
Active legal-status Critical Current
Anticipated expiration legal-status 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
    • E04G21/0463—Devices for both conveying and distributing with distribution hose with booms with boom control mechanisms, e.g. to automate concrete distribution
    • 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
    • B66C23/54—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 with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • 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
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration
    • 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
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/042—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3668—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where engagement is effected by a mechanical lever or handle

Definitions

  • the invention relates to a mast arm for a large manipulator, wherein the mast arm has a pivotable about a vertical axis turntable and a plurality of Mastarmsegmenten, wherein the Mastarmsegmente are pivoted at articulated joints each about bending axes relative to an adjacent Mastarmsegment or the fifth wheel by means of a respective drive unit, wherein at least one the drive units is attached to a first Mastarmsegment and acts via a lever mechanism on a second Mastarmsegment or the turntable, wherein the lever mechanism comprises at least one two-point lever.
  • Mast arms for large manipulators are known from the prior art.
  • Such mast arms comprise at least two Mastarmsegmente which are articulated at articulated joints about each horizontal bending axes relative to an adjacent Mastarmsegment by means of a respective drive element, in particular by means of a hydraulic cylinder, in particular limited between a Einfaltwolf and a working position.
  • the weight or the mass of the mast arm should be reduced in relation to the reach of the mast, without reducing the buckling resistance of the two-point lever.
  • the two-point lever encloses at least one cavity, a weight saving can be achieved without reducing the buckling resistance of the two-point lever.
  • the outer dimension can be easily increased, causing the Area of inertia, so the buckling resistance of the lever increases at the same weight.
  • this can reduce the weight of the two-point lever, without affecting the buckling resistance.
  • the two-point levers on the Mastarmsegmenten are exposed to high tensile and compressive forces. In particular, by the pressure load and the resulting risk of buckling, the two-point lever are usually made very wide and thus have a high weight.
  • a pivoted during operation of the boom arm far from the turntable two-point lever therefore generates a high load torque on the large manipulator, which involves the risk of tilting the entire machine in itself.
  • large Abstüt matter to the vehicle frame are needed, which limits the installation of the vehicle or large manipulator at the site.
  • With a hollow two-point lever weight saving can be achieved, which ensures a high buckling resistance under pressure loads and reduces required Abstütrich even with a small wall thickness of the cavity surrounding the two-point lever.
  • the wall thickness of the hollow two-point lever must be adapted to the maximum acting tensile force, since in a tensile load, the cross-sectional area of the two-point lever between the tow points is crucial.
  • the two-point lever is assembled from a plurality of components, wherein the assembled components form the cavity.
  • the joining of several components to a two-point lever allows easy formation of a weight-saving cavity in the two-point lever.
  • the Components of the two-point lever can be connected to one another by means of a welding process.
  • the two-point lever has at least two bearing points, wherein the cavity is formed in a portion between the bearing points.
  • the bearing points of the two-point lever are preferably formed by bearing rings or bearing eyes through which a bolt engages and rotatably supports the two-point lever on Mastarmsegment, reversing lever or turntable. Between these bearing points, a cavity forming portion is formed in the two-point lever, which forms the weight-saving cavity.
  • the bearing rings or bearing eyes forming the bearing points are preferably formed as solid steel rings.
  • a particularly advantageous embodiment of the invention provides that the cavity-forming portion is formed as a tube.
  • a tube which is usually rolled but also drawn or welded, may have a round or angular cross-section.
  • a tube as a cavity forming portion between the bearing rings or bearing eyes allows only between the pipe and the bearing rings or bearing eyes welds to form the two-point lever are required, so that the vulnerabilities are limited in particular for tensile loads on the two-point lever.
  • the cavity-forming section has at least one cavity-forming cut-out.
  • the cavity forming portion may also have a burnout in which material for forming the cavity has been burned out of a component of the two-point lever. The formation of the cavity by milling or burnout is an easy way to reduce the weight of the two-point lever by a geometrically exactly predeterminable cavity.
  • the cavity forming portion has at least one cavity forming bore.
  • the embodiment is particularly advantageous in that the cavity-forming section comprises welded-on side panels.
  • the welding of side plates in the cavity-forming section increases the buckling resistance of the two-point lever under pressure load by a stiffening on the outer edges of the two-point lever.
  • a particularly advantageous embodiment of the invention provides that the welded-on side panels are formed continuously beyond the at least two bearing points. Due to the fact that the welded-in side panels project beyond the bearing points, in particular the bearing rings or bearing eyes, they are connected to one another by a cohesive, rolled material layer. To connect the side plates with the bearing rings or bearing eyes of the bearing points welds are advantageously provided.
  • the cavity-forming portion is formed from welded together sheets.
  • a cavity forming section can be produced very easily and inexpensively.
  • a box profile is made of four sheets placed against each other, which are connected to each other via welds.
  • the invention relates to a large manipulator having a previously described in more detail below and in the mast arm.
  • a mast arm according to the invention is shown.
  • the mast arm 1 is in FIG. 1 shown mounted on a large manipulator 2.
  • the representation according to FIG. 1 shows a large manipulator 2 with mast arm 1, which has a pivotable about a vertical axis 3 turntable 4 and a plurality of Mastarmsegmenten 5, 5a, 5b.
  • the Mastarmsegmente 5, 5a, 5b can be about buckles 6, 6a, 6b respectively about buckling axes relative to an adjacent Mastarmsegment 5, 5a, 5b or the turntable 4 by means of a respective drive unit 7, 7a, 7b pivot.
  • the mast arm 1 is shown folded, so that trained as a vehicle large manipulator 2 can drive in the road to the place of use.
  • the drive units 7, 7a, 7b are attached to the Mastarmsegmenten 5, 5a, 5b and act via lever mechanism 8 to another Mastarmsegment 5, 5a, 5b or the fifth wheel 4.
  • the lever mechanism 8 at least a two-point lever 9.
  • a two-point lever 9 is shown, which is subject to a high tensile load at the beginning of the unfolding process.
  • the two-point lever 9 shown is supported by bolts on the first Mastarmsegment 5 and on the lever 19, on which the first drive unit 7 acts.
  • the other articulated joints 6a, 6b include lever mechanism 8 on which two-point lever 9 are provided to transfer between the Mastarmsegment 5 and the lever 19 on the drive unit 7a, 7b tensile and compressive forces during folding and unfolding of the boom arm 1.
  • FIG. 2 shows a schematic view of a mast arm 1 according to the invention in one embodiment.
  • the mast arm 1 has a first 5 and a second 5a Mastarmsegment on an articulated joint 6 a about a horizontal Bending axis relative to the adjacent Mastarmsegment 5, 5 a by means of a drive unit 7, 7 a are pivotable.
  • the drive unit 7a which is preferably a hydraulic cylinder, is attached to the first Mastarmsegment 5 and acts via a lever mechanism 8 on the second Mastarmsegment 5a.
  • the lever mechanism 8 preferably has two levers, wherein a lever is designed as a two-point lever 9 and the other lever as a reversing lever 19.
  • a lever mechanism 8 is provided, on which the first drive unit 7 acts.
  • the arranged at the first articulated joint 6 lever mechanism 8, in addition to the lever 19 also has a two-point lever 9, which is exposed in the Mastarm ein shown the maximum pressure, since the first drive unit 7 on the lever 19 at the first articulated joint 6 in the position shown a strong Tensile load.
  • the two-point lever 9 is pivoted on the second articulated joint 6a through the mast arm 1 such that the weight of the two-point lever 9 exerts a large load moment on the turntable 4.
  • the load torque exerted by the two-point lever 9 can be reduced in the position shown, so that the supports 18 (FIG. FIG. 1 ) have to be extended far less so as to prevent the large manipulator 2 ( FIG. 1 ) to prevent.
  • the supports 18 ( FIG. 1 ) can therefore be shorter. This makes the installation of the large manipulator ( FIG. 1 ) also more flexible at the site as a smaller support distance is required to safely support the large manipulator 2.
  • FIG. 3a shows a schematic view of a two-point lever 9 according to the invention in a first embodiment.
  • a two-point lever 9 is shown, which is assembled from a plurality of components to form a cavity 10.
  • the assembled components are two bearing rings which form the bearing points 11, 12 of the two-point lever 9. Through these bearing rings 11, 12 is guided in each case a hinge pin to the two-point lever 9 on the lever 19 ( FIG.
  • FIG. 4a shows a further embodiment of a two-point lever 9 from a example rolled tube 13.
  • the portion 13 between the bearing rings, which form the bearing points 11, 12, is formed in the embodiment shown here by a square tube 13.
  • FIG. 4b it can be seen that the square tube 13 forms a cavity 10 between the two bearing points 11, 12.
  • the tube 13 with the other components, or the bearing rings 11, 12 of the two-point lever 9 preferably via welded joints, connected.
  • FIG. 5a shows a further embodiment of the two-point lever 9 according to the invention.
  • the two-point lever 9 is assembled from several components, wherein the assembled components form the cavity 10.
  • a cavity-forming cut-out 14 is provided in the cavity 10 forming portion 13.
  • the cavity 10 may also be made by burning out material from the component 20.
  • the one-piece middle component 20 of the two-point lever 9 has a corresponding cavity-forming cutout 14 or burnout 14.
  • the cavity forming portion 13 also includes welded side plates 16, 16a in FIG. 5b are shown separately.
  • the side plates 16 16a are formed continuously over the bearing points 11, 12 and thus provide additional stability for the two-point lever 9 thus formed FIG. 5a shown two-point lever 9, the side plates 16, 16a are welded to the middle component 20, so that the cavity-forming cutout 14 is covered by the side plates 16, 16a.
  • the side plates 16, 16 a increase the buckling stiffness of the two-point lever 9.
  • FIG. 6a shows a two-point lever 9 according to the invention in a further embodiment.
  • a central component 20 is provided which has a cavity-forming cutout 14 or burnout 14 in the region of the cavity-forming portion 13 between the bearing points 11, 12, as it also in FIG. 6b can be seen.
  • the welded to the central component 20 side plates 16 are constructed in several parts and have a web 21 and the bearing rings 11, 12 covering sheet metal rings 22.
  • the cover of the side plates 21, 22 increases the buckling resistance of the two-point lever 9 and prevents corrosion in the cavity-forming cutout 14 or Burnout 14 ago.
  • two-point lever 9 has a cavity 10, through which the two-point lever 9 clearly saves weight compared to levers made of solid material.
  • the two-point lever 9 shown here is composed of several components 11, 12, 16, 16a, 16b, 16c, wherein the components 11, 12, 16, 16a, 16b, 16c together include a cavity 10, which in a section 13 is formed between the bearing points 11, 12.
  • the cavity forming portion 13 is formed of welded sheets 16, 16a, 16b, 16c.
  • the cavity forming portion 13 has welded side plates 16, 16 a formed continuously over the at least two support points 11, 12.
  • the bearing rings 11, 12, which form the bearing points 11, 12, of the welded side plates 16, 16 a comprises, whereby a stable and kinking two-point lever 9 is given with reduced weight.
  • FIGS. 8a and 8b show a two-point lever 9 which is also composed of a plurality of components 11, 12, 16, 16a, 16b, 16c, wherein the components 11, 12, 16, 16a, 16b, 16c together form a cavity 10, which in a portion 13 between the Bearing points 11, 12 is formed.
  • the cavity forming portion 13 has welded side plates 16, 16 a formed continuously over the at least two support points 11, 12.
  • the bearing rings 11, 12, which form the bearing points 11, 12, of the welded side plates 16, 16 a comprises.
  • the cavity forming portion 13 includes further sheets 16b, 16c which are welded together with the side sheets 16, 16a to form an edge profile to form the cavity 10.
  • bearing rings 11, 12 of the bearing points 11, 12 have a projection 23 for screwing the rotation of the received in the bearing rings 11, 12 hinge pin (not shown).
  • This anti-rotation lock is in FIG. 8c shown in more detail.
  • the bearing ring 12 has a further projection 24 for positioning and Sch healthybadêt.
  • a rotation 25 of the bolt is indicated by dashed lines.
  • the further bearing ring 11 is designed accordingly.
  • FIGS. 9a, 9b and 9c show a two-point lever 9 according to the invention, wherein a cavity 10 is formed in a portion 13 between the bearing points 11, 12 by a plurality of cavity-forming holes 15 are provided in the section 13. These introduced holes 13 are in the sectional views according to the FIGS. 9b and 9c can be seen very well and run between the two bearing points 11, 12 along the cavity-forming portion 13th
  • FIGS. 10b and 10c show a two-point lever 9 according to the invention, wherein also here a cavity 10 is formed in a portion 13 between the bearing points 11, 12, for which purpose a cutout 14 in the cavity-forming portion 13 is provided.
  • This introduced cutout 14 is in the sectional views according to FIGS. 10b and 10c can be seen very well and extends between the two bearing points 11, 12 along the cavity-forming portion 13th
  • the representation according to FIG. 11 shows a two-point lever 9 according to the invention, which is designed in particular for a buckling load in lever level. Due to the shape of the lever 9, in particular of the cavity-forming portion 13, the lever 9 is particularly adapted to its buckling, so that the lever 9 can absorb a kink load in the lever plane with the least possible use of materials optimally. In this case, the two-point lever 9 acts like a buckling bar after Euler case 2.
  • FIG. 12 shows a two-point lever 9 according to the invention, which is designed in particular for a buckling load perpendicular to the lever plane.
  • the description for FIG. 11 Shall apply accordingly.
  • the two-point lever 9 acts like a buckling bar after Euler case 4.

Abstract

Die Erfindung betrifft einen Mastarm (1) für einen Großmanipulator (2), der einen um eine Hochachse (3) drehbaren Drehschemel (4) und eine Mehrzahl von Mastarmsegmenten (5, 5a, 5b) aufweist, wobei die Mastarmsegmente (5, 5a, 5b) an Knickgelenken (6, 6a, 6b) jeweils um Knickachsen gegenüber einem benachbarten Mastarmsegment (5, 5a, 5b) oder dem Drehschemel (4) mittels je eines Antriebsaggregates (7, 7a, 7b) verschwenkbar sind, wobei wenigstens eines der Antriebsaggregate (7, 7a, 7b) an einem ersten Mastarmsegment (5, 5a, 5b) befestigt ist und über ein Hebelgetriebe (8) auf ein zweites Mastarmsegment (5, 5a) oder den Drehschemel (4) wirkt, wobei das Hebelgetriebe (8) wenigstens einen Zweipunkthebel (9) umfasst. Gemäß der Erfindung umschließt der Zweipunkthebel (9) wenigstens einen Hohlraum (10). Außerdem betrifft die Erfindung einen Großmanipulator (2) mit einem solchen Mastarm (1).

Figure imgaf001
The invention relates to a mast arm (1) for a large manipulator (2) which has a turntable (4) rotatable about a vertical axis (3) and a plurality of mast arm segments (5, 5a, 5b), the mast arm segments (5, 5a, 5b) on articulated joints (6, 6a, 6b) in each case about bending axes relative to an adjacent Mastarmsegment (5, 5a, 5b) or the turntable (4) by means of a respective drive unit (7, 7a, 7b) are pivotable, wherein at least one of the drive units (7, 7a, 7b) is attached to a first Mastarmsegment (5, 5a, 5b) and acts via a lever mechanism (8) on a second Mastarmsegment (5, 5a) or the fifth wheel (4), wherein the lever mechanism (8) at least one two-point lever (9). According to the invention, the two-point lever (9) encloses at least one cavity (10). In addition, the invention relates to a large manipulator (2) with such a mast arm (1).
Figure imgaf001

Description

Die Erfindung betrifft einen Mastarm für einen Großmanipulator, wobei der Mastarm einen um eine Hochachse drehbaren Drehschemel und eine Mehrzahl von Mastarmsegmenten aufweist, wobei die Mastarmsegmente an Knickgelenken jeweils um Knickachsen gegenüber einem benachbarten Mastarmsegment oder dem Drehschemel mittels je eines Antriebsaggregates verschwenkbar sind, wobei wenigstens eines der Antriebsaggregate an einem ersten Mastarmsegment befestigt ist und über ein Hebelgetriebe auf ein zweites Mastarmsegment oder den Drehschemel wirkt, wobei das Hebelgetriebe wenigstens einen Zweipunkthebel umfasst.The invention relates to a mast arm for a large manipulator, wherein the mast arm has a pivotable about a vertical axis turntable and a plurality of Mastarmsegmenten, wherein the Mastarmsegmente are pivoted at articulated joints each about bending axes relative to an adjacent Mastarmsegment or the fifth wheel by means of a respective drive unit, wherein at least one the drive units is attached to a first Mastarmsegment and acts via a lever mechanism on a second Mastarmsegment or the turntable, wherein the lever mechanism comprises at least one two-point lever.

Mastarme für Großmanipulatoren sind aus dem Stand der Technik bekannt. Solche Mastarme umfassen wenigstens zwei Mastarmsegmente, die an Knickgelenken um jeweils horizontale Knickachsen gegenüber einem benachbarten Mastarmsegment mittels je eines Antriebselements, insbesondere mittels eines Hydraulikzylinders, insbesondere begrenzt zwischen einer Einfaltstellung und einer Arbeitsstellung verschwenkbar sind.Mast arms for large manipulators are known from the prior art. Such mast arms comprise at least two Mastarmsegmente which are articulated at articulated joints about each horizontal bending axes relative to an adjacent Mastarmsegment by means of a respective drive element, in particular by means of a hydraulic cylinder, in particular limited between a Einfaltstellung and a working position.

Die Anforderungen an die Reichweite von Großmanipulatoren wachsen immer weiter. Indem jedoch die Maße bzw. das Gewicht der Großmanipulatoren aufgrund gesetzlicher Regelungen bestimmte Grenzen nicht ohne weiteres überschreiten dürfen, bedarf es spezieller Überlegungen, um den größeren Reichweitenanforderungen gerecht zu werden, ohne dabei gesetzliche Bestimmungen zu verletzen.The requirements for the reach of large manipulators continue to grow. However, because the dimensions or weight of the large manipulators may not easily exceed certain limits due to legal regulations, special considerations are needed to meet the greater reach requirements without violating legal provisions.

Aus dem Stand der Technik sind Großmanipulatoren, insbesondere Autobetonpumpen, bekannt, bei denen die miteinander gelenkig verbundenen Mastarmsegmente über Hebelgeometrien miteinander verbunden sind, so dass sie gegeneinander ein- bzw. ausgefaltet werden können. Hierbei wirkt in der Regel ein Hydraulikzylinder über Umlenkhebel auf die Mastarmsegmente. In der Regel sind die Hebel als gerade Stangen ausgebildet. Bei Autobetonpumpen kann die Verlegung der Betonförderleitung durch die Knickgelenke vorgesehen sein. Dann sind die Hebel oft gebogen ausgebildet, um beim Bewegen der Mastarmsegmente eine Kollision zwischen Umlenkhebel und der Betonförderleitung zu verhindern. Die bekannten Umlenkhebel weisen aber insgesamt das Problem auf, dass sie aufgrund der großen zu übertragenden Belastungen und aufgrund der gekrümmten Form ein sehr hohes Eigengewicht aufweisen.Large manipulators, in particular truck-mounted concrete pumps, are known from the prior art, in which the mast arm segments which are connected to one another in an articulated manner are connected to one another via lever geometries, so that they can be folded in or out against one another. As a rule, a hydraulic cylinder acts on the mast arm segments via a reversing lever. As a rule, the levers are designed as straight rods. In truck-mounted concrete pumps, the laying of the concrete delivery line can be provided by the articulated joints. Then the levers are often bent to prevent a collision between the lever and the concrete delivery line when moving the Mastarmsegmente. The known reversing lever but have the overall problem that they have a very high weight due to the large loads to be transmitted and because of the curved shape.

Aus diesem Grund schlägt die WO 2016/078706 A1 vor, Vertiefungen oder Durchbrüche in den Zweipunkthebeln vorzusehen. Allerdings vergrößern die Vertiefungen oder Durchbrüche nicht die Knicksteifigkeit. Zur Vergrößerung der Knicksteifigkeit müssten die Hebel dicker ausgeführt werden, wodurch sich deren Gewicht erhöht.Because of this, the beats WO 2016/078706 A1 to provide recesses or openings in the two-point levers. However, the depressions or openings do not increase the buckling resistance. To increase the buckling resistance, the levers would have to be made thicker, which increases their weight.

Es ist daher Aufgabe der Erfindung, einen Mastarm der oben genannten Art bereitzustellen, der den gewachsenen Anforderungen an die Reichweite von Großmanipulatoren gerecht wird, ohne dass damit Beeinträchtigungen in anderer Hinsicht einhergehen. Insbesondere soll das Gewicht bzw. die Masse des Mastarms im Verhältnis zur Reichweite des Masts verringert werden, ohne die Knicksteifigkeit des Zweipunkthebels zu reduzieren.It is therefore an object of the invention to provide a boom arm of the type mentioned above, which meets the growing demands on the range of large manipulators without this being accompanied by impairments in other respects. In particular, the weight or the mass of the mast arm should be reduced in relation to the reach of the mast, without reducing the buckling resistance of the two-point lever.

Gelöst wird diese Aufgabe durch einen Mastarm mit den Merkmalen des Anspruchs 1, sowie einen Großmanipulator mit den Merkmalen des Anspruchs 10.This problem is solved by a boom with the features of claim 1, and a large manipulator with the features of claim 10.

Dadurch, dass der Zweipunkthebel wenigstens einen Hohlraum umschließt, kann eine Gewichtsersparnis erreicht werden, ohne die Knicksteifigkeit des Zweipunkthebels zu reduzieren. Durch den Hohlraum im Zweipunkthebel kann zugleich die Außenabmessung leicht vergrößert werden, wodurch sich das Flächenträgheitsmoment, also die Knicksteifigkeit, des Hebels bei gleichem Gewicht erhöht. Andererseits lässt sich hierdurch das Gewicht des Zweipunkthebels reduzieren, ohne die Knicksteifigkeit zu beeinträchtigen. Die Zweipunkthebel an den Mastarmsegmenten sind hohen Zug und Druckkräften ausgesetzt. Insbesondere durch die Druckbelastung und die daraus resultierende Knickgefahr, werden die Zweipunkthebel in der Regel sehr breit ausgeführt und haben so ein hohes Gewicht. Ein im Betrieb des Mastarmes weit vom Drehschemel verschwenkter Zweipunkthebel erzeugt daher ein hohes Lastmoment auf den Großmanipulator, was die Gefahr des Kippens der gesamten Maschine in sich birgt. Um dies zu verhindern, sind wiederum große Abstützweiten an dem Fahrzeuggestell nötig, was die Aufstellung des Fahrzeugs bzw. Großmanipulators am Einsatzort einschränkt. Mit einem hohl ausgeführten Zweipunkthebel kann eine Gewichtsersparnis erreicht werden, die auch bei geringer Wandstärke des den Hohlraum umgebenden Zweipunkthebels eine hohe Knicksteifigkeit bei Druckbelastungen sicherstellt und erforderliche Abstützweiten reduziert. Besonders wenn die maximal wirkende Druckbelastung auf den Zweipunkthebel wesentlich größer ist als die maximal wirkende Zugkraft kann durch einen hohl ausgeführten Zweipunkthebel erheblich Gewicht eingespart werden. Die Wandstärke des hohl ausgeführten Zweipunkthebels muss auf die maximal wirkende Zugkraft angepasst sein, da bei einer Zugbelastung die Querschnittsfläche des Zweipunkthebels zwischen den Zugpunkten entscheidend ist.The fact that the two-point lever encloses at least one cavity, a weight saving can be achieved without reducing the buckling resistance of the two-point lever. Through the cavity in the two-point lever at the same time the outer dimension can be easily increased, causing the Area of inertia, so the buckling resistance of the lever increases at the same weight. On the other hand, this can reduce the weight of the two-point lever, without affecting the buckling resistance. The two-point levers on the Mastarmsegmenten are exposed to high tensile and compressive forces. In particular, by the pressure load and the resulting risk of buckling, the two-point lever are usually made very wide and thus have a high weight. A pivoted during operation of the boom arm far from the turntable two-point lever therefore generates a high load torque on the large manipulator, which involves the risk of tilting the entire machine in itself. To prevent this, again large Abstützweiten to the vehicle frame are needed, which limits the installation of the vehicle or large manipulator at the site. With a hollow two-point lever weight saving can be achieved, which ensures a high buckling resistance under pressure loads and reduces required Abstützweiten even with a small wall thickness of the cavity surrounding the two-point lever. Especially when the maximum acting pressure load on the two-point lever is substantially greater than the maximum tensile force can be saved considerably by a hollow running two-point lever weight. The wall thickness of the hollow two-point lever must be adapted to the maximum acting tensile force, since in a tensile load, the cross-sectional area of the two-point lever between the tow points is crucial.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. Es ist darauf hinzuweisen, dass die in den Ansprüchen einzeln aufgeführten Merkmale auch in beliebiger und technologisch sinnvoller Weise miteinander kombiniert werden können und somit weitere Ausgestaltungen der Erfindung aufzeigen.Advantageous embodiments and modifications of the invention will become apparent from the dependent claims. It should be noted that the features listed individually in the claims can also be combined with one another in any desired and technologically sensible manner and thus show further embodiments of the invention.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist vorgesehen, dass der Zweipunkthebel aus mehreren Komponenten zusammengefügt ist, wobei die zusammengefügten Komponenten den Hohlraum bilden. Das Zusammenfügen mehrerer Komponenten zu einem Zweipunkthebel ermöglicht die einfache Bildung eines Gewicht einsparenden Hohlraumes im Zweipunkthebel. Die Komponenten des Zweipunkthebels können mittels eines Schweißverfahrens miteinander verbunden sein.According to an advantageous embodiment of the invention it is provided that the two-point lever is assembled from a plurality of components, wherein the assembled components form the cavity. The joining of several components to a two-point lever allows easy formation of a weight-saving cavity in the two-point lever. The Components of the two-point lever can be connected to one another by means of a welding process.

Besonders vorteilhaft ist die Ausführungsform, dass der Zweipunkthebel mindestens zwei Lagerpunkte aufweist, wobei der Hohlraum in einem Abschnitt zwischen den Lagerpunkten gebildet ist. Die Lagerpunkte des Zweipunkthebels sind vorzugsweise durch Lagerringe bzw. Lageraugen gebildet, durch die jeweils ein Bolzen greift und den Zweipunkthebel drehbar am Mastarmsegment, Umlenkhebel oder Drehschemel lagert. Zwischen diesen Lagerpunkten ist ein Hohlraum bildender Abschnitt im Zweipunkthebel gebildet, der den gewichtseinsparenden Hohlraum bildet. Dadurch, dass der Hohlraum zwischen den Lagerpunkten gebildet ist, sind die Lagerpunkte selbst zur Aufnahme von Zug- und Druckkräften ausreichend stark dimensioniert. Die die Lagerpunkte bildenden Lagerringe bzw. Lageraugen sind hierzu vorzugsweise als massive Stahlringe ausgebildet.Particularly advantageous is the embodiment that the two-point lever has at least two bearing points, wherein the cavity is formed in a portion between the bearing points. The bearing points of the two-point lever are preferably formed by bearing rings or bearing eyes through which a bolt engages and rotatably supports the two-point lever on Mastarmsegment, reversing lever or turntable. Between these bearing points, a cavity forming portion is formed in the two-point lever, which forms the weight-saving cavity. The fact that the cavity is formed between the bearing points, the bearing points are dimensioned sufficiently strong even to absorb tensile and compressive forces. For this purpose, the bearing rings or bearing eyes forming the bearing points are preferably formed as solid steel rings.

Eine besonders vorteilhafte Ausführungsform der Erfindung sieht vor, dass der hohlraumausbildende Abschnitt als Rohr ausgebildet ist. Ein solches Rohr, das üblicherweise gewalzt aber auch gezogen oder geschweißt ist, kann einen runden oder eckigen Querschnitt aufweisen. Ein Rohr als hohlraumausbildender Abschnitt zwischen den Lagerringen bzw. Lageraugen ermöglicht, dass lediglich zwischen dem Rohr und den Lagerringen bzw. Lageraugen Schweißnähte zur Bildung des Zweipunkthebels erforderlich sind, sodass die Schwachstellen insbesondere für Zugbelastungen auf den Zweipunkthebel begrenzt sind.A particularly advantageous embodiment of the invention provides that the cavity-forming portion is formed as a tube. Such a tube, which is usually rolled but also drawn or welded, may have a round or angular cross-section. A tube as a cavity forming portion between the bearing rings or bearing eyes allows only between the pipe and the bearing rings or bearing eyes welds to form the two-point lever are required, so that the vulnerabilities are limited in particular for tensile loads on the two-point lever.

Von besonderem Vorteil ist gemäß einer Ausgestaltung, dass der hohlraumausbildende Abschnitt mindestens eine hohlraumbildende Ausfräsung aufweist. Der hohlraumausbildende Abschnitt kann auch eine Ausbrennung aufweisen, bei der Material zur Bildung des Hohlraumes aus einer Komponente des Zweipunkthebels herausgebrannt wurde. Die Bildung des Hohlraumes durch Ausfräsung oder Ausbrennung stellt eine einfache Möglichkeit dar, das Gewicht des Zweipunkthebels durch einen geometrisch genau vorgebbaren Hohlraum zu reduzieren.It is particularly advantageous according to an embodiment that the cavity-forming section has at least one cavity-forming cut-out. The cavity forming portion may also have a burnout in which material for forming the cavity has been burned out of a component of the two-point lever. The formation of the cavity by milling or burnout is an easy way to reduce the weight of the two-point lever by a geometrically exactly predeterminable cavity.

Eine vorteilhafte Ausführung ist, dass der hohlraumausbildende Abschnitt mindestens eine hohlraumbildende Bohrung aufweist. Mit der Bildung eines Hohlraumes durch eine oder mehrere in den Zweipunkthebel eingebrachte Bohrungen kann das Gewicht des Zweipunkthebels einfach reduziert werden, ohne die Knicksteifigkeit zu beeinträchtigen. Durch präzise und geeignete Anordnung der hohlraumbildenden Bohrung lässt sich gezielt Gewicht an dem Zweipunkthebel einsparen.An advantageous embodiment is that the cavity forming portion has at least one cavity forming bore. With the formation of a cavity by one or more bores introduced into the two-point lever, the weight of the two-point lever can be easily reduced without impairing the buckling resistance. By precise and suitable arrangement of the cavity-forming bore can be selectively save weight on the two-point lever.

Besonders vorteilhaft ist die Ausführungsform, dass der hohlraumausbildende Abschnitt angeschweißte Seitenbleche umfasst. Die Anschweißung von Seitenblechen im hohlraumausbildenden Abschnitt erhöht die Knicksteifigkeit des Zweipunkthebels bei Druckbelastung durch eine Versteifung an den Außenkanten des Zweipunkthebels.The embodiment is particularly advantageous in that the cavity-forming section comprises welded-on side panels. The welding of side plates in the cavity-forming section increases the buckling resistance of the two-point lever under pressure load by a stiffening on the outer edges of the two-point lever.

Eine besonders vorteilhafte Ausführungsform der Erfindung sieht vor, dass die angeschweißten Seitenbleche durchgehend über die mindestens zwei Lagerpunkte hinaus ausgebildet sind. Dadurch, dass die eingeschweißten Seitenbleche über die Lagerpunkte, insbesondere die Lagerringe bzw. Lageraugen, hinausragen, werden diese durch eine zusammenhängende, gewalzte Materialschicht miteinander verbunden. Zur Verbindung der Seitenbleche mit den Lagerringen bzw. Lageraugen der Lagerpunkte sind vorteilhaft Verschweißungen vorgesehen.A particularly advantageous embodiment of the invention provides that the welded-on side panels are formed continuously beyond the at least two bearing points. Due to the fact that the welded-in side panels project beyond the bearing points, in particular the bearing rings or bearing eyes, they are connected to one another by a cohesive, rolled material layer. To connect the side plates with the bearing rings or bearing eyes of the bearing points welds are advantageously provided.

Von besonderem Vorteil ist gemäß einer Ausgestaltung, dass der hohlraumausbildende Abschnitt aus zusammengeschweißten Blechen gebildet ist. Durch das Verschweißen von Blechen lässt sich ein hohlraumausbildender Abschnitt sehr einfach und kostengünstig herstellen. Hierbei wird vorzugsweise ein Kastenprofil aus vier aneinander gesetzten Blechen hergestellt, die über Schweißnähte miteinander verbunden sind.Of particular advantage, according to one embodiment, that the cavity-forming portion is formed from welded together sheets. By welding sheet metal, a cavity forming section can be produced very easily and inexpensively. In this case, preferably, a box profile is made of four sheets placed against each other, which are connected to each other via welds.

Ferner betrifft die Erfindung einen Großmanipulator, der einen bereits zuvor und im Folgenden näher beschriebenen Mastarm aufweist.Furthermore, the invention relates to a large manipulator having a previously described in more detail below and in the mast arm.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aufgrund der nachfolgenden Beschreibung sowie anhand der Zeichnungen. Ausführungsbeispiele der Erfindung sind in den folgenden Zeichnungen rein schematisch dargestellt und werden nachfolgend näher beschrieben. Einander entsprechende Gegenstände sind in allen Figuren mit den gleichen Bezugszeichen versehen. Es zeigen:

Figur 1
erfindungsgemäßer Großmanipulator,
Figur 2
erfindungsgemäßer Mastarm,
Figur 3a, 3b
erfindungsgemäßer Zweipunkthebel aus einem Rundrohr,
Figur 4a, 4b
erfindungsgemäßer Zweipunkthebel aus einem Vierkantrohr,
Figur 5a, 5b
erfindungsgemäßer Zweipunkthebel aus mehreren verschweißten Komponenten,
Figur 6a, 6b
erfindungsgemäßer Zweipunkthebel aus mehreren verschweißten Komponenten,
Figur 7a, 7b
erfindungsgemäßer Zweipunkthebel aus mehreren verschweißten Komponenten,
Figur 8a, 8b
erfindungsgemäßer Zweipunkthebel aus mehreren verschweißten Komponenten,
Figur 8c
Detailansicht zu Zweipunkthebel aus mehreren verschweißten Komponenten,
Figur 9a, 9b, 9c
erfindungsgemäßer Zweipunkthebel mit Bohrung,
Figur 10a, 10b
erfindungsgemäßer Zweipunkthebel mit Ausfräsung,
Figur 10c
Detailansicht zu Zweipunkthebel mit Ausfräsung,
Figur 11
erfindungsgemäßer Zweipunkthebel mit Knickbelastung in Hebelebene,
Figur 12
erfindungsgemäßer Zweipunkthebel mit Knickbelastung senkrecht zur Hebelebene.
Further features, details and advantages of the invention will become apparent from the following description and from the drawings. Embodiments of the invention are shown purely schematically in the following drawings and will be described in more detail below. Corresponding objects are provided in all figures with the same reference numerals. Show it:
FIG. 1
inventive large manipulator,
FIG. 2
Mastarm according to the invention,
Figure 3a, 3b
inventive two-point lever of a round tube,
Figure 4a, 4b
inventive two-point lever of a square tube,
Figure 5a, 5b
inventive two-point lever of several welded components,
Figure 6a, 6b
inventive two-point lever of several welded components,
Figure 7a, 7b
inventive two-point lever of several welded components,
Figure 8a, 8b
inventive two-point lever of several welded components,
FIG. 8c
Detail view of two-point lever made of several welded components,
FIGS. 9a, 9b, 9c
inventive two-point lever with hole,
Figure 10a, 10b
inventive two-point lever with cutout,
FIG. 10c
Detail view of two-point lever with cut-out,
FIG. 11
inventive two-point lever with buckling load in lever level,
FIG. 12
inventive two-point lever with buckling load perpendicular to the lever plane.

In den Figuren mit dem Bezugszeichen 1 bezeichnet ist ein erfindungsgemäßer Mastarm dargestellt. Der Mastarm 1 ist in Figur 1 auf einem Großmanipulator 2 montiert dargestellt. Die Darstellung gemäß Figur 1 zeigt einen Großmanipulator 2 mit Mastarm 1, der einen um eine Hochachse 3 drehbaren Drehschemel 4 und eine Mehrzahl von Mastarmsegmenten 5, 5a, 5b aufweist. Die Mastarmsegmente 5, 5a, 5b lassen sich über Knickgelenke 6, 6a, 6b jeweils um Knickachsen gegenüber einem benachbarten Mastarmsegment 5, 5a, 5b oder dem Drehschemel 4 mittels je eines Antriebsaggregates 7, 7a, 7b verschwenken. In der gezeigten Darstellung ist der Mastarm 1 zusammengefaltet dargestellt, sodass der als Fahrzeug ausgebildete Großmanipulator 2 im Straßenverkehr zum Einsatzort fahren kann. Bei Ausfaltung des Mastarmes 1 entsteht ein Kippmoment, welches über die am Fahrzeuggestell 17 angeordneten ausklappbaren und ausfahrbaren Stützen 18 abgestützt wird. Zum Ein- und Ausfalten des Mastarmes 1 sind die Antriebsaggregate 7, 7a, 7b an den Mastarmsegmenten 5, 5a, 5b befestigt und wirken über Hebelgetriebe 8 auf ein anderes Mastarmsegment 5, 5a, 5b oder den Drehschemel 4. Hierzu weisen die Hebelgetriebe 8 wenigstens einen Zweipunkthebel 9 auf. Am ersten Knickgelenk 6 ist ein Zweipunkthebel 9 gezeigt, der zu Beginn des Ausfaltvorganges einer hohen Zugbelastung unterliegt. Der gezeigte Zweipunkthebel 9 ist über Bolzen am ersten Mastarmsegment 5 und an dem Umlenkhebel 19 gelagert, auf den das erste Antriebsaggregat 7 wirkt. Auch die weiteren Knickgelenke 6a, 6b umfassen Hebelgetriebe 8 an denen Zweipunkthebel 9 vorgesehen sind, um zwischen dem Mastarmsegment 5 und dem Umlenkhebel 19 am Antriebsaggregat 7a, 7b Zug- und Druckkräfte beim Ein- und Ausfaltvorgang des Mastarmes 1 zu übertragen.In the figures, designated by the reference numeral 1, a mast arm according to the invention is shown. The mast arm 1 is in FIG. 1 shown mounted on a large manipulator 2. The representation according to FIG. 1 shows a large manipulator 2 with mast arm 1, which has a pivotable about a vertical axis 3 turntable 4 and a plurality of Mastarmsegmenten 5, 5a, 5b. The Mastarmsegmente 5, 5a, 5b can be about buckles 6, 6a, 6b respectively about buckling axes relative to an adjacent Mastarmsegment 5, 5a, 5b or the turntable 4 by means of a respective drive unit 7, 7a, 7b pivot. In the illustration shown, the mast arm 1 is shown folded, so that trained as a vehicle large manipulator 2 can drive in the road to the place of use. When unfolding the mast arm 1 creates a tilting moment, which is supported on the arranged on the vehicle frame 17 folding and extendable supports 18. For folding and unfolding of the mast arm 1, the drive units 7, 7a, 7b are attached to the Mastarmsegmenten 5, 5a, 5b and act via lever mechanism 8 to another Mastarmsegment 5, 5a, 5b or the fifth wheel 4. For this purpose, the lever mechanism 8 at least a two-point lever 9. At the first articulated joint 6, a two-point lever 9 is shown, which is subject to a high tensile load at the beginning of the unfolding process. The two-point lever 9 shown is supported by bolts on the first Mastarmsegment 5 and on the lever 19, on which the first drive unit 7 acts. The other articulated joints 6a, 6b include lever mechanism 8 on which two-point lever 9 are provided to transfer between the Mastarmsegment 5 and the lever 19 on the drive unit 7a, 7b tensile and compressive forces during folding and unfolding of the boom arm 1.

Figur 2 zeigt eine schematische Ansicht eines erfindungsgemäßen Mastarmes 1 in einer Ausführungsform. Der Mastarm 1 weist ein erstes 5 und ein zweites 5a Mastarmsegment auf, die an einem Knickgelenk 6a um eine horizontale Knickachse gegenüber dem benachbarten Mastarmsegment 5, 5a mittels eines Antriebsaggregates 7, 7a verschwenkbar sind. Das Antriebsaggregat 7a, bei dem es sich bevorzugt um einen Hydraulikzylinder handelt, ist an dem ersten Mastarmsegment 5 befestigt und wirkt über ein Hebelgetriebe 8 auf das zweite Mastarmsegment 5a. Das Hebelgetriebe 8 weist bevorzugt zwei Hebel auf, wobei ein Hebel als Zweipunkthebel 9 und der andere Hebel als Umlenkhebel 19 ausgebildet ist. Auch zwischen dem ersten Mastarmsegment 5 und dem Drehschemel 4 ist ein Hebelgetriebe 8 vorgesehen, auf welches das erste Antriebsaggregat 7 wirkt. Das an dem ersten Knickgelenk 6 angeordnete Hebelgetriebe 8 weist neben dem Umlenkhebel 19 ebenfalls einen Zweipunkthebel 9 auf, der in der gezeigten Mastarmstellung dem maximalen Druck ausgesetzt ist, da das erste Antriebsaggregat 7 auf den Umlenkhebel 19 am ersten Knickgelenk 6 in der gezeigten Stellung eine starke Zugbelastung ausübt. In der gezeigten Stellung ist der Zweipunkthebel 9 am zweiten Knickgelenk 6a derart durch den Mastarm 1 verschwenkt, dass das Gewicht des Zweipunkthebels 9 ein großes Lastmoment auf den Drehschemel 4 ausübt. Durch Reduzierung des Gewichts am Zweipunkthebel 9 lässt sich das durch den Zweipunkthebel 9 ausgeübte Lastmoment in der gezeigten Stellung reduzieren, sodass die Stützen 18 (Figur 1) weniger weit ausgefahren werden müssen, um ein Umkippen des Großmanipulators 2 (Figur 1) zu verhindern. Die Stützen 18 (Figur 1) können somit auch kürzer dimensioniert werden. Dies macht die Aufstellung des Großmanipulators (Figur 1) am Einsatzort außerdem flexibler, da eine geringere Abstützweite erforderlich ist, um den Großmanipulator 2 sicher abzustützen. FIG. 2 shows a schematic view of a mast arm 1 according to the invention in one embodiment. The mast arm 1 has a first 5 and a second 5a Mastarmsegment on an articulated joint 6 a about a horizontal Bending axis relative to the adjacent Mastarmsegment 5, 5 a by means of a drive unit 7, 7 a are pivotable. The drive unit 7a, which is preferably a hydraulic cylinder, is attached to the first Mastarmsegment 5 and acts via a lever mechanism 8 on the second Mastarmsegment 5a. The lever mechanism 8 preferably has two levers, wherein a lever is designed as a two-point lever 9 and the other lever as a reversing lever 19. Also between the first Mastarmsegment 5 and the fifth wheel 4, a lever mechanism 8 is provided, on which the first drive unit 7 acts. The arranged at the first articulated joint 6 lever mechanism 8, in addition to the lever 19 also has a two-point lever 9, which is exposed in the Mastarmstellung shown the maximum pressure, since the first drive unit 7 on the lever 19 at the first articulated joint 6 in the position shown a strong Tensile load. In the position shown, the two-point lever 9 is pivoted on the second articulated joint 6a through the mast arm 1 such that the weight of the two-point lever 9 exerts a large load moment on the turntable 4. By reducing the weight on the two-point lever 9, the load torque exerted by the two-point lever 9 can be reduced in the position shown, so that the supports 18 (FIG. FIG. 1 ) have to be extended far less so as to prevent the large manipulator 2 ( FIG. 1 ) to prevent. The supports 18 ( FIG. 1 ) can therefore be shorter. This makes the installation of the large manipulator ( FIG. 1 ) also more flexible at the site as a smaller support distance is required to safely support the large manipulator 2.

Figur 3a zeigt eine schematische Ansicht eines erfindungsgemäßen Zweipunkthebels 9 in einer ersten Ausgestaltung. Ein solcher Zweipunkthebel 9, aber auch die im Folgenden beschriebenen Zweipunkthebel, können in einem Hebelgetriebe 8 (Figur 1 und 2) eines Mastarmes 1 (Figur 1 und 2) zum Einsatz kommen und hier Gewicht einsparen und das Lastmoment reduzieren, welches durch das Gewicht der Zweipunkthebel 9 auf den Drehschemel 4 ausgeübt wird. In Figur 3a ist ein Zweipunkthebel 9 gezeigt, der aus mehreren Komponenten zusammengefügt ist, um einen Hohlraum 10 zu bilden. Bei den zusammengefügten Komponenten handelt es sich um zwei Lagerringe welche die Lagerpunkte 11, 12, des Zweipunkthebels 9 bilden. Durch diese Lagerringe 11, 12 wird jeweils ein Gelenkbolzen geführt, um den Zweipunkthebel 9 an dem Umlenkhebel 19 (Figur 1 und 2) und dem Mastarmsegment 5, 5a, 5b (Figur 1 und 2) oder Drehschemel 4 drehbar zu lagern. Zwischen den Lagerringen 11, 12 ist ein Abschnitt 13 gebildet, der aus einem beispielsweise gewalztem Rundrohr besteht. Dieses Rundrohr 13 bildet einen Hohlraum 10, der in Figur 3b zu sehen ist. Durch Verschweißen der Lagerringe 11, 12 an dem Rundrohr 13 wird der Zweipunkthebel 9 aus den Komponenten 11, 12, 13, wie in Figur 3a gezeigt, zusammengefügt. Hierdurch ist ein einfach herzustellender Zweipunkthebel 9 gegeben, der eine deutliche Gewichtsreduzierung gegenüber üblichen Zweipunkthebeln 9 bietet. FIG. 3a shows a schematic view of a two-point lever 9 according to the invention in a first embodiment. Such a two-point lever 9, but also the two-point lever described below, in a lever mechanism 8 ( FIG. 1 and 2 ) of a mast arm 1 ( FIG. 1 and 2 ) are used here and save weight and reduce the load torque, which is exerted by the weight of the two-point lever 9 on the fifth wheel 4. In FIG. 3a a two-point lever 9 is shown, which is assembled from a plurality of components to form a cavity 10. The assembled components are two bearing rings which form the bearing points 11, 12 of the two-point lever 9. Through these bearing rings 11, 12 is guided in each case a hinge pin to the two-point lever 9 on the lever 19 ( FIG. 1 and 2 ) and the mast arm segment 5, 5a, 5b ( FIG. 1 and 2 ) or turntable 4 to store rotatably. Between the bearing rings 11, 12, a portion 13 is formed, which consists of a rolled example, round tube. This round tube 13 forms a cavity 10, which in FIG. 3b you can see. By welding the bearing rings 11, 12 to the round tube 13, the two-point lever 9 of the components 11, 12, 13, as in FIG. 3a shown, put together. As a result, a simple to produce two-point lever 9 is given, which offers a significant reduction in weight compared to conventional two-point levers 9.

Die Figur 4a zeigt eine weitere Ausgestaltung eines Zweipunkthebels 9 aus einem beispielsweise gewalzten Rohr 13. Der Abschnitt 13 zwischen den Lagerringen, welche die Lagerpunkte 11, 12 bilden, ist im hier gezeigten Ausführungsbeispiel durch ein Vierkantrohr 13 gebildet. In Figur 4b ist zu erkennen, dass das Vierkantrohr 13 einen Hohlraum 10 zwischen den beiden Lagerpunkten 11, 12 bildet. Hierdurch ist eine erhebliche Gewichtsreduzierung erreichbar, wobei insbesondere die Vierkantquerschnittskontur des gewalzten Rohres 13 besonders geeignet ist, um eine ausreichende Knicksteifigkeit für Druckbelastungen zu gewährleisten, da das Flächenträgheitsmoment des Hebels 9 durch die vergrößerten Außenabmessungen erhöht ist. Auch in dem hier gezeigten Ausführungsbeispiel ist das Rohr 13 mit den weiteren Komponenten, bzw. den Lageringen 11, 12 des Zweipunkthebels 9, vorzugsweise über Schweißverbindungen, verbunden.The FIG. 4a shows a further embodiment of a two-point lever 9 from a example rolled tube 13. The portion 13 between the bearing rings, which form the bearing points 11, 12, is formed in the embodiment shown here by a square tube 13. In FIG. 4b it can be seen that the square tube 13 forms a cavity 10 between the two bearing points 11, 12. In this way, a significant reduction in weight can be achieved, wherein in particular the square cross-sectional contour of the rolled tube 13 is particularly suitable to ensure a sufficient buckling rigidity for compressive loads, since the area moment of inertia of the lever 9 is increased by the increased outer dimensions. Also in the embodiment shown here, the tube 13 with the other components, or the bearing rings 11, 12 of the two-point lever 9, preferably via welded joints, connected.

Die Figur 5a zeigt eine weitere Ausgestaltung des erfindungsgemäßen Zweipunkthebels 9. Auch im hier gezeigten Beispiel ist der Zweipunkthebel 9 aus mehreren Komponenten zusammengefügt, wobei die zusammengefügten Komponenten den Hohlraum 10 bilden. In einer der Komponenten 20 ist im Hohlraum 10 ausbildenden Abschnitt 13 eine hohlraumbildende Ausfräsung 14 vorgesehen. Der Hohlraum 10 kann beispielsweise auch durch Ausbrennen von Material aus der Komponente 20 hergestellt werden. In Figur 5a ist zu erkennen, dass die einteilige Mittelkomponente 20 des Zweipunkthebels 9 eine entsprechende hohlraumbildende Ausfräsung 14 oder Ausbrennung 14 aufweist. Der hohlraumausbildende Abschnitt 13 umfasst außerdem angeschweißte Seitenbleche 16, 16a die in Figur 5b separat gezeigt sind. Die Seitenbleche 16 16a sind durchgehend über die Lagerpunkte 11, 12 hinaus ausgebildet und bieten hierdurch eine zusätzliche Stabilität für den so gebildeten Zweipunkthebel 9. Zur Herstellung des in Figur 5a gezeigten Zweipunkthebels 9 werden die Seitenbleche 16, 16a auf die Mittelkomponente 20 aufgeschweißt, sodass die hohlraumbildende Ausfräsung 14 durch die Seitenbleche 16, 16a abgedeckt ist. Die Seitenbleche 16, 16a erhöhen die Knicksteifigkeit des Zweipunkthebels 9.The FIG. 5a shows a further embodiment of the two-point lever 9 according to the invention. Also in the example shown here, the two-point lever 9 is assembled from several components, wherein the assembled components form the cavity 10. In one of the components 20, a cavity-forming cut-out 14 is provided in the cavity 10 forming portion 13. For example, the cavity 10 may also be made by burning out material from the component 20. In FIG. 5a It can be seen that the one-piece middle component 20 of the two-point lever 9 has a corresponding cavity-forming cutout 14 or burnout 14. The cavity forming portion 13 also includes welded side plates 16, 16a in FIG. 5b are shown separately. The side plates 16 16a are formed continuously over the bearing points 11, 12 and thus provide additional stability for the two-point lever 9 thus formed FIG. 5a shown two-point lever 9, the side plates 16, 16a are welded to the middle component 20, so that the cavity-forming cutout 14 is covered by the side plates 16, 16a. The side plates 16, 16 a increase the buckling stiffness of the two-point lever 9.

Die Figur 6a zeigt einen erfindungsgemäßen Zweipunkthebel 9 in einer weiteren Ausgestaltung. Auch hier ist eine Mittelkomponente 20 vorgesehen, die eine hohlraumausbildende Ausfräsung 14 oder Ausbrennung 14 im Bereich des hohlraumausbildenden Abschnitts 13 zwischen den Lagerpunkten 11, 12 aufweist, wie es auch in Figur 6b zu erkennen ist. Die an die Mittelkomponente 20 angeschweißten Seitenbleche 16 sind mehrteilig aufgebaut und verfügen über einen Steg 21 sowie die Lagerringe 11, 12 abdeckende Blechringe 22. Die Abdeckung der Seitenbleche 21, 22 erhöht die Knicksteifigkeit des Zweipunkthebels 9 und beugt der Korrosionen in der hohlraumausbildenden Ausfräsung 14 oder Ausbrennung 14 vor.The FIG. 6a shows a two-point lever 9 according to the invention in a further embodiment. Again, a central component 20 is provided which has a cavity-forming cutout 14 or burnout 14 in the region of the cavity-forming portion 13 between the bearing points 11, 12, as it also in FIG. 6b can be seen. The welded to the central component 20 side plates 16 are constructed in several parts and have a web 21 and the bearing rings 11, 12 covering sheet metal rings 22. The cover of the side plates 21, 22 increases the buckling resistance of the two-point lever 9 and prevents corrosion in the cavity-forming cutout 14 or Burnout 14 ago.

Auch der in den Figuren 7a und 7b gezeigte Zweipunkthebel 9 weist einen Hohlraum 10 auf, durch den der Zweipunkthebel 9 deutlich an Gewicht gegenüber Hebeln aus Vollmaterial einspart. Wie an der Schnittdarstellung gemäß Figur 7a zu erkennen ist, ist der hier gezeigte Zweipunkthebel 9 aus mehreren Komponenten 11, 12, 16, 16a, 16b, 16c zusammengefügt, wobei die Komponenten 11, 12, 16, 16a, 16b, 16c zusammengefügt einen Hohlraum 10 einschließen, der in einem Abschnitt 13 zwischen den Lagerpunkten 11, 12 gebildet ist. Der hohlraumausbildende Abschnitt 13 ist aus zusammengeschweißten Blechen 16, 16a, 16b, 16c gebildet. Der hohlraumausbildende Abschnitt 13 weist angeschweißte Seitenbleche 16, 16a auf, die durchgehend über die mindestens zwei Lagerpunkte 11, 12 hinaus ausgebildet sind. Hierdurch sind die Lagerringe 11, 12, die die Lagerpunkte 11, 12 bilden, von den eingeschweißten Seitenblechen 16, 16a umfasst, wodurch ein stabiler und knickfester Zweipunkthebel 9 mit reduziertem Eigengewicht gegeben ist.Also in the FIGS. 7a and 7b shown two-point lever 9 has a cavity 10, through which the two-point lever 9 clearly saves weight compared to levers made of solid material. As in the sectional view according to Figure 7a can be seen, the two-point lever 9 shown here is composed of several components 11, 12, 16, 16a, 16b, 16c, wherein the components 11, 12, 16, 16a, 16b, 16c together include a cavity 10, which in a section 13 is formed between the bearing points 11, 12. The cavity forming portion 13 is formed of welded sheets 16, 16a, 16b, 16c. The cavity forming portion 13 has welded side plates 16, 16 a formed continuously over the at least two support points 11, 12. As a result, the bearing rings 11, 12, which form the bearing points 11, 12, of the welded side plates 16, 16 a comprises, whereby a stable and kinking two-point lever 9 is given with reduced weight.

Die Figuren 8a und 8b zeigen einen Zweipunkthebel 9 der ebenfalls aus mehreren Komponenten 11, 12, 16, 16a, 16b, 16c zusammengefügt ist, wobei die Komponenten 11, 12, 16, 16a, 16b, 16c zusammen einen Hohlraum 10 bilden, der in einem Abschnitt 13 zwischen den Lagerpunkten 11, 12 gebildet ist. Der hohlraumausbildende Abschnitt 13 weist angeschweißte Seitenbleche 16, 16a auf, die durchgehend über die mindestens zwei Lagerpunkte 11, 12 hinaus ausgebildet sind. Hierdurch sind die Lagerringe 11, 12, welche die Lagerpunkte 11, 12 bilden, von den eingeschweißten Seitenblechen 16, 16a umfasst. Außerdem umfasst der hohlraumausbildende Abschnitt 13 weitere Bleche 16b, 16c, die mit den Seitenblechen 16, 16a zu einem Kantenprofil zusammengeschweißt sind, um den Hohlraum 10 zu bilden. Zusätzlich verfügen die Lagerringe 11, 12 der Lagerpunkte 11, 12 über einen Vorsprung 23 zur Verschraubung der Verdrehsicherung des in den Lagerringen 11, 12 aufgenommenen Gelenksbolzens (nicht gezeigt). Diese Verdrehsicherung ist in Figur 8c detaillierter dargestellt. Hier ist zu erkennen, dass der Lagerring 12 einen weiteren Vorsprung 24 zur Positionierung und zur Schweißbadsicherung aufweist. Außerdem ist eine Verdrehsicherung 25 des Bolzens gestrichelt angedeutet. Auch der weitere Lagerring 11 ist entsprechend ausgestaltet.The FIGS. 8a and 8b show a two-point lever 9 which is also composed of a plurality of components 11, 12, 16, 16a, 16b, 16c, wherein the components 11, 12, 16, 16a, 16b, 16c together form a cavity 10, which in a portion 13 between the Bearing points 11, 12 is formed. The cavity forming portion 13 has welded side plates 16, 16 a formed continuously over the at least two support points 11, 12. As a result, the bearing rings 11, 12, which form the bearing points 11, 12, of the welded side plates 16, 16 a comprises. In addition, the cavity forming portion 13 includes further sheets 16b, 16c which are welded together with the side sheets 16, 16a to form an edge profile to form the cavity 10. In addition, the bearing rings 11, 12 of the bearing points 11, 12 have a projection 23 for screwing the rotation of the received in the bearing rings 11, 12 hinge pin (not shown). This anti-rotation lock is in FIG. 8c shown in more detail. Here it can be seen that the bearing ring 12 has a further projection 24 for positioning and Schweißbadsicherung. In addition, a rotation 25 of the bolt is indicated by dashed lines. Also, the further bearing ring 11 is designed accordingly.

Die Figuren 9a, 9b und 9c zeigen einen erfindungsgemäßen Zweipunkthebel 9, wobei ein Hohlraum 10 in einem Abschnitt 13 zwischen den Lagerpunkten 11, 12 gebildet ist, indem mehrere hohlraumbildende Bohrungen 15 in dem Abschnitt 13 vorgesehen sind. Diese eingebrachten Bohrungen 13 sind in den Schnittdarstellungen gemäß der Figuren 9b und 9c sehr gut zu erkennen und verlaufen zwischen den beiden Lagerpunkten 11, 12 entlang des hohlraumbildenden Abschnitts 13.The Figures 9a, 9b and 9c show a two-point lever 9 according to the invention, wherein a cavity 10 is formed in a portion 13 between the bearing points 11, 12 by a plurality of cavity-forming holes 15 are provided in the section 13. These introduced holes 13 are in the sectional views according to the FIGS. 9b and 9c can be seen very well and run between the two bearing points 11, 12 along the cavity-forming portion 13th

Die Figuren 10a, 10b und 10c zeigen einen erfindungsgemäßen Zweipunkthebel 9, wobei auch hier ein Hohlraum 10 in einem Abschnitt 13 zwischen den Lagerpunkten 11, 12 gebildet ist, wobei hierzu eine Ausfräsung 14 in dem hohlraumbildenden Abschnitt 13 vorgesehen ist. Diese eingebrachte Ausfräsung 14 ist in den Schnittdarstellungen gemäß Figur 10b und 10c sehr gut zu erkennen und verläuft zwischen den beiden Lagerpunkten 11, 12 entlang des hohlraumbildenden Abschnitts 13.The Figures 10a, 10b and 10c show a two-point lever 9 according to the invention, wherein also here a cavity 10 is formed in a portion 13 between the bearing points 11, 12, for which purpose a cutout 14 in the cavity-forming portion 13 is provided. This introduced cutout 14 is in the sectional views according to FIGS. 10b and 10c can be seen very well and extends between the two bearing points 11, 12 along the cavity-forming portion 13th

Die Darstellung gemäß Figur 11 zeigt einen erfindungsgemäßen Zweipunkthebel 9, der insbesondere für eine Knickbelastung in Hebelebene ausgelegt ist. Durch die Formgebung des Hebels 9, insbesondere des hohlraumbildenden Abschnitts 13, ist der Hebel 9 seiner Knickfigur besonders angepasst, so dass der Hebel 9 eine Knickbelastung in der Hebelebene bei geringstmöglichem Materialeinsatz optimal aufnehmen kann. In diesem Fall wirkt der Zweipunkthebel 9 wie ein Knickstab nach Euler Fall 2.The representation according to FIG. 11 shows a two-point lever 9 according to the invention, which is designed in particular for a buckling load in lever level. Due to the shape of the lever 9, in particular of the cavity-forming portion 13, the lever 9 is particularly adapted to its buckling, so that the lever 9 can absorb a kink load in the lever plane with the least possible use of materials optimally. In this case, the two-point lever 9 acts like a buckling bar after Euler case 2.

Die Darstellung gemäß Figur 12 zeigt einen erfindungsgemäßen Zweipunkthebel 9, der insbesondere für eine Knickbelastung senkrecht zur Hebelebene ausgelegt ist. Die Beschreibung zur Figur 11 gilt entsprechend. In diesem Fall wirkt der Zweipunkthebel 9 wie ein Knickstab nach Euler Fall 4.The representation according to FIG. 12 shows a two-point lever 9 according to the invention, which is designed in particular for a buckling load perpendicular to the lever plane. The description for FIG. 11 Shall apply accordingly. In this case, the two-point lever 9 acts like a buckling bar after Euler case 4.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Mastarmmast arm
22
Großmanipulatorlarge manipulator
33
Hochachsevertical axis
44
Drehschemelturntable
55
5a 5b Mastarmsegmente5a 5b mast arm segments
66
6a 6b Knickgelenke6a 6b Articulated joints
77
7a 7b Antriebsaggregate7a 7b drive units
88th
Hebelgetriebelever mechanism
99
ZweipunkthebelTwo-point lever
1010
Hohlraumcavity
1111
Lagerpunkt AStorage point A
1212
Lagerpunkt BBearing point B
1313
hohlraumausbildender AbschnittCavity forming section
1414
Ausfräsung, AusbrennungMilling, burnout
1515
Bohrungdrilling
1616
16a Seitenbleche, 16b 16c weitere Bleche16a side plates, 16b 16c more plates
1717
Fahrzeuggestellvehicle chassis
1818
StützenSupport
1919
UmlenkhebelUmlenkhebel
2020
Mittelkomponenteagent component
2121
Stegweb
2222
Blechringesheet metal rings
2323
Vorsprung (Verdrehsicherung)Projection (anti-rotation)
2424
Vorsprung (Schweißbadsicherung)Projection (weld pool protection)
2525
Verdrehsicherungtwist

Claims (10)

Mastarm (1) für einen Großmanipulator (2), wobei der Mastarm (1) einen um eine Hochachse (3) drehbaren Drehschemel (4) und eine Mehrzahl von Mastarmsegmenten (5, 5a, 5b) aufweist, wobei die Mastarmsegmente (5, 5a, 5b) an Knickgelenken (6, 6a, 6b) jeweils um Knickachsen gegenüber einem benachbarten Mastarmsegment (5, 5a, 5b) oder dem Drehschemel (4) mittels je eines Antriebsaggregates (7, 7a, 7b) verschwenkbar sind, wobei wenigstens eines der Antriebsaggregate (7, 7a, 7b) an einem ersten Mastarmsegment (5, 5a, 5b) befestigt ist und über ein Hebelgetriebe (8) auf ein zweites Mastarmsegment (5, 5a) oder den Drehschemel (4) wirkt, wobei das Hebelgetriebe (8) wenigstens einen Zweipunkthebel (9) umfasst,
dadurch gekennzeichnet, dass der Zweipunkthebel (9) wenigstens einen Hohlraum (10) umschließt.Mast arm (1) for a large manipulator (2), wherein the mast arm (1) about a vertical axis (3) rotatable turntable (4) and a plurality of Mastarmsegmenten (5, 5a, 5b), wherein the Mastarmsegmente (5, 5a , 5b) at articulated joints (6, 6a, 6b) in each case about buckling axes relative to an adjacent Mastarmsegment (5, 5a, 5b) or the turntable (4) by means of a respective drive unit (7, 7a, 7b) are pivotable, wherein at least one of Drive units (7, 7a, 7b) on a first Mastarmsegment (5, 5a, 5b) is fixed and via a lever mechanism (8) on a second Mastarmsegment (5, 5a) or the fifth wheel (4) acts, wherein the lever mechanism (8 ) comprises at least one two-point lever (9),
characterized in that the two-point lever (9) encloses at least one cavity (10). Mastarm (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Zweipunkthebel (9) aus mehreren Komponenten (9a, 9b, 9c, ...) zusammengefügt ist, wobei die zusammengefügten Komponenten (9a, 9b, 9c, ...) den Hohlraum (10) bilden.Mast arm (1) according to claim 1, characterized in that the two-point lever (9) of several components (9a, 9b, 9c, ...) is joined together, wherein the assembled components (9a, 9b, 9c, ...) the Form cavity (10). Mastarm (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Zweipunkthebel (9) mindestens zwei Lagerpunkte (11, 12) aufweist, wobei der Hohlraum (10) in einem Abschnitt (13) zwischen den Lagerpunkte (11, 12) gebildet ist.Mast arm (1) according to one of the preceding claims, characterized in that the two-point lever (9) has at least two bearing points (11, 12), wherein the cavity (10) in a portion (13) formed between the bearing points (11, 12) is. Mastarm (1) nach Anspruch 3, dadurch gekennzeichnet, dass der hohlraumausbildende Abschnitt (13) als Rohr ausgebildet ist.Mast arm (1) according to claim 3, characterized in that the cavity-forming portion (13) is formed as a tube. Mastarm (1) nach Anspruch 3, dadurch gekennzeichnet, dass der hohlraumausbildende Abschnitt (13) mindestens eine hohlraumbildende Ausfräsung (14) aufweist.Mast arm (1) according to claim 3, characterized in that the cavity-forming portion (13) has at least one cavity-forming cut-out (14). Mastarm (1) nach Anspruch 3, dadurch gekennzeichnet, dass der hohlraumausbildende Abschnitt (13) mindestens eine hohlraumbildende Bohrung (15) aufweist.Mast arm (1) according to claim 3, characterized in that the cavity-forming portion (13) has at least one cavity-forming bore (15). Mastarm (1) nach einem der vorangehenden Ansprüche 3 bis 6, dadurch gekennzeichnet, dass der hohlraumausbildende Abschnitt (13) angeschweißte Seitenbleche (16, 16a, 16b, 16c) umfasst.Mast arm (1) according to one of the preceding claims 3 to 6, characterized in that the cavity-forming portion (13) comprises welded side plates (16, 16a, 16b, 16c). Mastarm (1) nach Anspruch 7, dadurch gekennzeichnet, dass die angeschweißten Seitenbleche (16, 16a, 16b, 16c) durchgehend über die mindestens zwei Lagerpunkte (11, 12) hinaus ausgebildet sind.Mast arm (1) according to claim 7, characterized in that the welded side plates (16, 16a, 16b, 16c) are formed continuously over the at least two bearing points (11, 12) addition. Mastarm (1) nach einem der vorangehenden Ansprüche 3 bis 7, dadurch gekennzeichnet, dass der hohlraumausbildende Abschnitt (13) aus zusammengeschweißten Blechen (16, 16a, 16b, 16c) gebildet ist.Mast arm (1) according to one of the preceding claims 3 to 7, characterized in that the cavity-forming portion (13) of welded-together sheets (16, 16a, 16b, 16c) is formed. Großmanipulator (2), insbesondere Autobetonpumpe, mit einem Mastarm (1) nach einem der vorangehenden Ansprüche.Large manipulator (2), in particular truck-mounted concrete pump, with a boom arm (1) according to one of the preceding claims.
EP18201908.3A 2017-10-26 2018-10-23 Hollow two point lever Active EP3477018B1 (en)

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DE102017125145.6A DE102017125145A1 (en) 2017-10-26 2017-10-26 Hollow two-point lever

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CN109707168A (en) 2019-05-03
EP3477018B1 (en) 2021-04-07
DE102017125145A1 (en) 2019-05-02
US20190127998A1 (en) 2019-05-02

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