EP3477018B1 - Levier creux à deux points - Google Patents

Levier creux à deux points Download PDF

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Publication number
EP3477018B1
EP3477018B1 EP18201908.3A EP18201908A EP3477018B1 EP 3477018 B1 EP3477018 B1 EP 3477018B1 EP 18201908 A EP18201908 A EP 18201908A EP 3477018 B1 EP3477018 B1 EP 3477018B1
Authority
EP
European Patent Office
Prior art keywords
cavity
mast arm
lever
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.)
Active
Application number
EP18201908.3A
Other languages
German (de)
English (en)
Other versions
EP3477018A1 (fr
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/fr
Application granted granted Critical
Publication of EP3477018B1 publication Critical patent/EP3477018B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B66C23/62—Constructional features or details
    • 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, the mast arm having a turntable that can be rotated about a vertical axis and a plurality of mast arm segments, the mast arm segments on articulated joints each being pivotable about articulated axes relative to an adjacent mast arm segment or the turntable by means of a drive unit each, with at least one the drive unit is attached to a first mast arm segment and acts on a second mast arm segment or the turntable via a lever mechanism, the lever mechanism comprising at least one two-point lever.
  • Mast arms for large manipulators are from the prior art, for example from CN 205 743 025 U , CN 103 216 096 A , CN 203 613 805 U or WO 2014/032840 A1 , known.
  • Such mast arms comprise at least two mast arm segments which can be pivoted at articulated joints around horizontal articulation axes relative to an adjacent mast arm segment by means of a drive element each, in particular by means of a hydraulic cylinder, in particular limited between a folded position and a working position.
  • the WO 2016/078706 A1 propose to provide recesses or breakthroughs in the two-point levers.
  • the depressions or breakthroughs do not increase the buckling resistance.
  • the levers would have to be made thicker, which increases their weight.
  • the object of the invention to provide a mast arm of the type mentioned above, which meets the growing demands on the range of large manipulators without being associated with impairments in other respects.
  • the weight or the mass of the mast arm should be reduced in relation to the reach of the mast without reducing the buckling rigidity of the two-point lever.
  • the two-point lever encloses at least one cavity, a weight saving can be achieved without reducing the buckling rigidity of the two-point lever. Due to the cavity in the two-point lever, the outer dimensions can be increased slightly at the same time, which increases the area moment of inertia, i.e. the buckling rigidity, of the lever with the same weight. On the other hand, this allows the weight of the two-point lever to be reduced without impairing the buckling rigidity.
  • the two-point levers on the mast arm segments are exposed to high tensile and compressive forces. In particular, due to the pressure load and the resulting risk of kinking, the two-point levers are usually very wide and are therefore very heavy.
  • a two-point lever pivoted far from the turntable when the mast arm is in operation therefore generates a high load torque on the large manipulator, which harbors the risk of the entire machine tipping over.
  • large support widths are again necessary on the vehicle frame, which restricts the installation of the vehicle or large manipulator at the place of use.
  • a hollow two-point lever With a hollow two-point lever, a weight saving can be achieved which, even with a small wall thickness of the two-point lever surrounding the cavity, ensures a high level of buckling resistance under pressure loads and reduces the required support widths.
  • the wall thickness of the hollow two-point lever must be adapted to the maximum effective tensile force, since the cross-sectional area of the two-point lever between the tensile points is decisive in the event of a tensile load.
  • the two-point lever has at least two bearing points, the cavity being formed in a section 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 in each case and the two-point lever is rotatably mounted on the mast arm segment, deflection lever or turntable.
  • a cavity-forming section is formed in the two-point lever between these bearing points and forms the weight-saving cavity. Because the cavity is formed between the bearing points, the bearing points themselves are sufficiently large to absorb tensile and compressive forces.
  • the bearing rings or bearing eyes forming the bearing points are preferably designed as solid steel rings for this purpose.
  • a particularly advantageous embodiment which does not form part of the invention, provides that the cavity-forming section is designed as a tube.
  • a tube which is usually rolled but also drawn or welded, can have a round or angular cross section.
  • a tube as a cavity-forming section between the bearing rings or bearing eyes makes it possible that weld seams are only required between the tube and the bearing rings or bearing eyes to form the two-point lever, so that the weak points are limited in particular for tensile loads on the two-point lever.
  • the cavity-forming section has at least one cavity-forming cutout.
  • the cavity-forming section can also have a burn-out in which material for forming the cavity was burned out of a component of the two-point lever.
  • the formation of the cavity by milling or burning out is a simple way of doing that To reduce the weight of the two-point lever through a geometrically precisely predeterminable cavity.
  • the cavity-forming section has at least one cavity-forming bore.
  • the cavity-forming section comprises welded-on side plates.
  • the welding of side plates in the cavity-forming section increases the buckling rigidity of the two-point lever when subjected to pressure by stiffening the outer edges of the two-point lever.
  • the welded-on side plates are formed continuously beyond the at least two bearing points. Because the welded-in side plates protrude beyond the bearing points, in particular the bearing rings or bearing eyes, they are connected to one another by a cohesive, rolled material layer. In order to connect the side plates to the bearing rings or bearing eyes of the bearing points, welds are advantageously provided.
  • the cavity-forming section is formed from metal sheets welded together.
  • a cavity-forming section can be produced very simply and inexpensively by welding metal sheets.
  • a box profile is preferably made from four metal sheets placed next to one another, which are connected to one another via weld seams.
  • the invention also relates to a large manipulator which has a mast arm which has already been described in more detail above and below.
  • a mast arm according to the invention is shown in the figures with the reference number 1.
  • the mast arm 1 is in Figure 1 shown mounted on a large manipulator 2.
  • the representation according to Figure 1 shows a large manipulator 2 with a mast arm 1, 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 can be pivoted by means of articulated joints 6, 6a, 6b about articulated axes relative to an adjacent mast arm segment 5, 5a, 5b or the turntable 4 by means of a drive unit 7, 7a, 7b each.
  • the mast arm 1 is shown folded up so that the large manipulator 2, which is designed as a vehicle, can drive to the place of use in road traffic.
  • the drive units 7, 7a, 7b are attached to the mast arm segments 5, 5a, 5b and act via lever gears 8 on another mast arm segment 5, 5a, 5b or the turntable 4 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 mast arm segment 5 and on the reversing lever 19 on which the first drive unit 7 acts.
  • the other articulated joints 6a, 6b also include lever gears 8 on which two-point levers 9 are provided in order to transmit tensile and compressive forces between the mast arm segment 5 and the deflection lever 19 on the drive unit 7a, 7b when the mast arm 1 is folded in and out.
  • 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 mast arm segment, which is attached to an articulated joint 6a around a horizontal
  • the articulation axis can be pivoted with respect to the adjacent mast arm segment 5, 5a by means of a drive unit 7, 7a.
  • the drive unit 7a which is preferably a hydraulic cylinder, is attached to the first mast arm segment 5 and acts on the second mast arm segment 5a via a lever mechanism 8.
  • the lever mechanism 8 preferably has two levers, one lever being designed as a two-point lever 9 and the other lever as a reversing lever 19.
  • a lever mechanism 8, on which the first drive unit 7 acts, is also provided between the first mast arm segment 5 and the turntable 4.
  • the lever mechanism 8 arranged on the first articulated joint 6 also has a two-point lever 9 in addition to the deflection lever 19, which is exposed to the maximum pressure in the mast arm position shown, since the first drive unit 7 acts on the deflection lever 19 on the first articulated joint 6 in the position shown Exerts tensile load.
  • the two-point lever 9 on the second articulated joint 6a is pivoted by the mast arm 1 in such a way that the weight of the two-point lever 9 exerts a large load moment on the turntable 4.
  • the load moment exerted by the two-point lever 9 can be reduced in the position shown, so that the supports 18 ( Figure 1 ) do not have to be extended as far to prevent the large manipulator 2 ( Figure 1 ) to prevent.
  • the supports 18 ( Figure 1 ) can therefore also be dimensioned shorter. This makes the installation of the large manipulator ( Figure 1 ) also more flexible at the place of use, since a smaller support width is required to safely support the large manipulator 2.
  • FIG 3a shows a schematic view of a two-point lever 9 in a first embodiment not according to the invention.
  • a two-point lever 9 can be used in a lever mechanism 8 ( Figure 1 and 2 ) of a mast arm 1 ( Figure 1 and 2 ) are used and save weight here and reduce the load torque which is exerted on the turntable 4 by the weight of the two-point lever 9.
  • a two-point lever 9 is shown which is assembled from several components in order 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.
  • a section 13 is formed between the bearing rings 11, 12 and consists of a round tube that is rolled, for example. This round tube 13 forms a cavity 10, which in Figure 3b you can see.
  • the two-point lever 9 is made from the components 11, 12, 13, as in FIG Figure 3a shown, put together. This results in a two-point lever 9 that is easy to manufacture and offers a significant reduction in weight compared to conventional two-point levers 9.
  • the Figure 4a shows a further embodiment of a two-point lever 9, not according to the invention, made of a rolled tube 13, for example.
  • the section 13 between the bearing rings, which form the bearing points 11, 12, is formed by a square tube 13 in the exemplary embodiment shown here.
  • the square tube 13 forms a cavity 10 between the two bearing points 11, 12.
  • the square cross-sectional contour of the rolled tube 13 being particularly suitable to ensure sufficient buckling resistance for pressure loads, since the area moment of inertia of the lever 9 is increased by the enlarged external dimensions.
  • the tube 13 is connected to the further components, or to the bearing rings 11, 12 of the two-point lever 9, preferably via welded connections.
  • the Figure 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, the assembled components forming the cavity 10.
  • a cavity-forming cutout 14 is provided in the section 13 forming the cavity 10.
  • the cavity 10 can also be produced, for example, by burning out material from the component 20.
  • the one-piece central 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 Figure 5b shown separately.
  • the side plates 16 16a are formed continuously beyond the bearing points 11, 12 and thereby offer additional stability for the two-point lever 9 formed in this way Figure 5a
  • the two-point lever 9 shown, the side plates 16, 16a are welded onto the central component 20 so that the cavity-forming cutout 14 is covered by the side plates 16, 16a.
  • the side plates 16, 16a increase the buckling rigidity of the two-point lever 9.
  • the Figure 6a shows a two-point lever 9 according to the invention in a further embodiment.
  • a central component 20 is provided, which has a cutout 14 or burnout 14 that forms a cavity in the region of the cavity-forming section 13 between the bearing points 11, 12, as is also the case in FIG Figure 6b can be seen.
  • the side plates 21, 22 welded to the central component 20 are constructed in several parts and have a web 21 and sheet metal rings 22 covering the bearing rings 11, 12 14 or burnout 14 before.
  • the two-point lever 9 shown not according to the invention, has a cavity 10 through which the two-point lever 9 saves significantly in 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 assembled, the components 11, 12, 16, 16a, 16b, 16c assembled including a cavity 10, which in a section 13 is formed between the bearing points 11, 12.
  • the cavity-forming section 13 is formed from sheets 16, 16a, 16b, 16c welded together.
  • the cavity-forming section 13 has welded-on side plates 16, 16a, which are formed continuously beyond the at least two bearing points 11, 12.
  • the bearing rings 11, 12, which form the bearing points 11, 12 are surrounded by the welded-in side plates 16, 16a, which results in a stable and kink-resistant two-point lever 9 with a reduced dead weight.
  • the Figures 8a and 8b show a two-point lever 9, not according to the invention, which is also assembled from several components 11, 12, 16, 16a, 16b, 16c, the components 11, 12, 16, 16a, 16b, 16c together forming a cavity 10, which is in a section 13 is formed between the bearing points 11, 12.
  • the cavity-forming section 13 has welded-on side plates 16, 16a, which are formed continuously beyond the at least two bearing points 11, 12.
  • the bearing rings 11, 12, which form the bearing points 11, 12, are surrounded by the welded-in side plates 16, 16a.
  • the cavity-forming section 13 comprises further sheets 16b, 16c, which are welded together with the side sheets 16, 16a to form an edge profile in order to form the cavity 10.
  • bearing rings 11, 12 of the bearing points 11, 12 have a projection 23 for screwing the anti-rotation device of the hinge pin received in the bearing rings 11, 12 (not shown).
  • This anti-rotation device is in Figure 8c shown in more detail. It can be seen here that the bearing ring 12 has a further projection 24 for positioning and for securing the weld pool.
  • a rotation lock 25 of the bolt is indicated by dashed lines.
  • the further bearing ring 11 is also designed accordingly.
  • FIGS 9a, 9b and 9c show a two-point lever 9, not according to the invention, wherein a cavity 10 is formed in a section 13 between the bearing points 11, 12 in that a plurality of cavity-forming bores 15 are provided in the section 13. These introduced bores 13 are shown in the sectional views according to FIG Figures 9b and 9c can be seen very well and run between the two bearing points 11, 12 along the cavity-forming section 13.
  • FIGS. 10a, 10b and 10c show a two-point lift 9 not according to the invention, a cavity 10 also being formed here in a section 13 between the bearing points 11, 12, a cutout 14 being provided in the cavity-forming section 13 for this purpose.
  • This milled recess 14 is shown in the sectional views according to FIG Figures 10b and 10c can be seen very well and runs between the two bearing points 11, 12 along the cavity-forming section 13.
  • the representation according to Figure 11 shows a two-point lever 9 not according to the invention, which is designed in particular for a buckling load in the lever plane. Due to the shape of the lever 9, in particular the cavity-forming section 13, the lever 9 is particularly adapted to its buckling shape, so that the lever 9 can optimally absorb a buckling load in the lever plane with the least possible use of material.
  • the two-point lever 9 acts like a buckling rod according to Euler case 2.
  • the representation according to Figure 12 shows a two-point lever 9 not according to the invention, which is designed in particular for a buckling load perpendicular to the lever plane.
  • the description for the Figure 11 Shall apply accordingly.
  • the two-point lever 9 acts like a buckling rod according to Euler case 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manipulator (AREA)
  • Vehicle Body Suspensions (AREA)
  • Jib Cranes (AREA)

Claims (4)

  1. Bras de mât (1) pour un manipulateur de grande taille (2), dans lequel le bras de mât (1) présente un tabouret rotatif (4) pouvant tourner autour d'un axe vertical (3) et une multitude de segments de bras de mât (5, 5a, 5b), dans lequel les segments de bras de mât (5, 5a, 5b) peuvent être pivotés au niveau d'articulations pivotantes (6, 6a, 6b) respectivement autour d'axes pivotants par rapport à un segment de bras de mât adjacent (5, 5a, 5b) ou au tabouret rotatif (4) au moyen de respectivement un groupe d'entraînement (7, 7a, 7b), dans lequel au moins un des groupes d'entraînement (7, 7a, 7b) est fixé au niveau d'un premier segment de bras de mât (5, 5a, 5b) et agit par l'intermédiaire d'un mécanisme à levier (8) sur un deuxième segment de bras de mât (5, 5a) ou sur le tabouret rotatif (4), dans lequel le mécanisme à levier (8) comprend au moins un levier à deux points (9), dans lequel le levier à deux points (9) renferme au moins un espace creux (10), dans lequel le levier à deux points (9) présente deux points de montage (11, 12), dans lequel l'espace creux (10) est formé dans une section (13) entre les points de montage (11, 12),
    caractérisé en ce
    qu'est prévu un composant central (20) en une partie avec les deux points de montage (11, 12), qui présente la section de formation d'espace creux (13) entre les points de montage (11, 12), dans lequel la section de formation d'espace creux (13) comprend des tôles latérales (16, 16a, 21, 22) soudées sur le composant central (20), et que les tôles latérales (16, 16a, 21, 22) soudées sont réalisées soit de manière continue au-delà des deux points de montage (11, 12) soit présentent une structure en plusieurs parties avec respectivement une entretoise (21) ainsi que des bagues en tôle (22) recouvrant les deux points de montage (11, 12).
  2. Bras de mât (1) selon la revendication 1, caractérisé en ce que la section de formation d'espace creux (13) présente au moins un chanfreinage de formation d'espace creux (14).
  3. Bras de mât (1) selon la revendication 1, caractérisé en ce que la section de formation d'espace creux (13) présente au moins un alésage de formation d'espace creux (15).
  4. Manipulateur de grande taille (2), en particulier pompe à béton automatique, avec un bras de mât (1) selon l'une quelconque des revendications précédentes.
EP18201908.3A 2017-10-26 2018-10-23 Levier creux à deux points Active EP3477018B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017125145.6A DE102017125145A1 (de) 2017-10-26 2017-10-26 Hohler Zweipunkthebel

Publications (2)

Publication Number Publication Date
EP3477018A1 EP3477018A1 (fr) 2019-05-01
EP3477018B1 true EP3477018B1 (fr) 2021-04-07

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EP18201908.3A Active EP3477018B1 (fr) 2017-10-26 2018-10-23 Levier creux à deux points

Country Status (4)

Country Link
US (1) US20190127998A1 (fr)
EP (1) EP3477018B1 (fr)
CN (1) CN109707168A (fr)
DE (1) DE102017125145A1 (fr)

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CN112267682A (zh) * 2020-09-28 2021-01-26 湖南响箭重工科技有限公司 一种新型臂架变幅机构及具有该臂架变幅机构的混凝土泵车
CN115947246A (zh) * 2023-03-10 2023-04-11 山东力达智能车辆产业技术研究院有限公司 一种用于房车发送运输的拖挂起吊设备

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DE102017125145A1 (de) 2019-05-02
EP3477018A1 (fr) 2019-05-01
CN109707168A (zh) 2019-05-03

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