EP3466863A1 - Kran mit hochklappbarem ausleger mit verriegelungsvorrichtung des auslegers in hochgeklappter konfiguration - Google Patents

Kran mit hochklappbarem ausleger mit verriegelungsvorrichtung des auslegers in hochgeklappter konfiguration Download PDF

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Publication number
EP3466863A1
EP3466863A1 EP18198725.6A EP18198725A EP3466863A1 EP 3466863 A1 EP3466863 A1 EP 3466863A1 EP 18198725 A EP18198725 A EP 18198725A EP 3466863 A1 EP3466863 A1 EP 3466863A1
Authority
EP
European Patent Office
Prior art keywords
support
boom
crane
movable rod
shaft
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
EP18198725.6A
Other languages
English (en)
French (fr)
Other versions
EP3466863B1 (de
Inventor
Sylvain Raymond
Lotfi BOUSKINE
Gabriel FRAISSE
Sylvain Brunet
Anthony CHAMPCENEST
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.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
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 Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Publication of EP3466863A1 publication Critical patent/EP3466863A1/de
Application granted granted Critical
Publication of EP3466863B1 publication Critical patent/EP3466863B1/de
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B66C23/826—Bracing equipment acting at an inclined angle to vertical and horizontal directions
    • B66C23/828—Bracing equipment acting at an inclined angle to vertical and horizontal directions where the angle is adjustable
    • 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
    • B66C23/16—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 jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear
    • B66C23/90—Devices for indicating or limiting lifting moment
    • 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
    • B66C23/88—Safety gear
    • B66C23/92—Snubbers or dashpots for preventing backwards swinging of jibs, e.g. in the event of cable or tackle breakage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm

Definitions

  • the present invention relates to a luffing jib crane, and in particular to a luffing jib tower crane.
  • the present invention relates to a luffing jib crane provided with a lifting jack adapted to act on the boom to move it up and down.
  • the present invention relates to a method of locking a luffing jib in a raised safety configuration.
  • the present invention applies to the field of tower cranes comprising a luffing jib.
  • the present invention is applicable to several crane structures, for example to structures composed of lattices and frames.
  • this luffing ram comprising a jack body mechanically connected to a crane structure element and a movable rod articulated on the luffing jib, where the movable rod is movable in the cylinder body enters at least one deployed position and at least one retracted position to move the liftable and lowering boom between at least one raised configuration and at least one lowered configuration.
  • a wind vane of the boom For safety reasons, and particularly in case of strong winds, it is recommended, or even mandatory, to carry out a wind vane of the boom, by disengaging the boom (in other words by unlocking the orientation brakes) so that it is free to rotate to automatically move in the direction of the wind and thus allow to leave the crane without human supervision.
  • the wind vane is made with the boom in a raised safety configuration corresponding to a fairly precise configuration to minimize the radius of gyration of the boom and thus prevent the boom from weather vane, flies over areas near the site, such as traffic lanes, buildings, ...
  • the boom is maintained in a raised safety configuration even in service, when the crane handles a load, in order to prevent the boom and the suspended load from flying over such areas near the site.
  • the lifting cylinder does not deform, and in particular does not not compress, at the risk of seeing the arrow lower and so fly over the prohibited areas.
  • the lifting or lowering movement of the boom is performed by the lifting cylinder, which can be a hydraulic or electric cylinder.
  • This lifting cylinder is always connected between the structural element and the boom, which has the effect of controlling the movement of the boom in the rising direction (lifting) and also in the direction of descent (lowering).
  • the present invention aims in particular to solve all or part of the aforementioned drawbacks, by providing a locking device which ensures a locking of the luffing jib in the raised safety configuration, whatever the external conditions, and even during long periods when the boom is vaneed in the raised safety configuration without human control.
  • the invention aims to ensure a fixed range of the boom to meet the prohibition of flying over areas near the site, even under high wind conditions.
  • Another object of the invention is to guarantee, during the locking of the luffing jib in the raised safety configuration, a force path between the jib and the cylinder body which is aligned to the maximum, or even perfectly, with the cylinder body to avoid bending in this cylinder body and thus risk its damage.
  • this locking device with pivoting spacer makes it possible to precisely block the boom in the raised safety configuration, so that the crane can in particular be turned into a wind vane (that is to say free to rotate to automatically orient itself in the wind direction).
  • the support device will provide an annular support surface for the abutment which, by virtue of the ball joint connection with the support ring, makes it possible both to transmit the forces from the abutment to the cylinder body, and to to make up for any misalignments with the cylinder body, resulting for example from manufacturing defects and / or mounting defects.
  • the mechanical adjustment system will make it possible to make up for any misalignments between the pivot axes of the movable rod and the spacer, and thus will allow optimized transmission of the forces from the boom to the body of cylinder, via the rotated support device.
  • this mechanical adjustment system will allow to adjust the position of the spacer and thus ensure that this spacer is as aligned as possible with the cylinder body, in addition to the stop device, which will ensure have a locking device (spacer + stop) forming a rigid assembly that can take up the compression forces that ensure the maintenance of the boom configuration raised security.
  • the bearing ring has an annular bottom surface, opposite the bearing surface, forming a first mating surface
  • the support ring has an annular upper surface forming a second mating surface, wherein the first coupling surface and the second coupling surface are rotatably supported to provide a bearing of the abutment on the support surface of the bearing ring which is uniformly distributed on each side of the longitudinal axis of the jack lift.
  • one of the first coupling surface and the second coupling surface is spherical, and the other of the first coupling surface and the second coupling surface is of a shape spherical or conical.
  • one of the first coupling surface and the second coupling surface defines a male bearing while the other of the first coupling surface and the second coupling surface defines a bearing. female.
  • the at least one ring is provided with peripheral orifices distributed around the eccentric bore, each peripheral orifice corresponding to a given angular position, and the immobilizing device comprises a peg passing through the peripheral orifice corresponding to the selected angular position, said pin also passing through a locking hole on the second support and oblong to allow movement of the pin within the locking hole when adjusting the alignment between the pivot axes .
  • the second support has at least two oblong-shaped locking holes to be able to receive the pin in one or other of the locking holes and thus provide two additional degrees of adjustment of the alignment of the pivot axes.
  • the locking device comprises a locking rod passing through the second shaft and the second support to cooperate with a clamping member (such as a nut) adapted to clamp the at least one ring against the second support to secure the eccentric system and the second support.
  • a clamping member such as a nut
  • the eccentric system comprises two identical rings disposed on either side of the second support, where the second shaft has two cylindrical portions at its respective ends which are received inside the eccentric bores of the two respective rings.
  • the second support has an oblong housing internally receiving the second shaft, wherein the second shaft has a central portion slidably mounted within said elongate housing, so that this housing provides a set of adjustment for the portion central which allows, during the adjustment of the pivot axes with the eccentric system, a clearance for the second shaft in the housing.
  • the central articulation of the movable rod is accessible. Indeed, in the event of a possible failure of the lift cylinder, it may be necessary to replace it. With this retraction, it is possible to easily release access to the central joint to disassemble, even if the arrow is in height and therefore without resorting to a lowering of the arrow to the ground.
  • the abutment comprises an arcuate central portion defining a groove inside which the movable rod is positioned in the locking position, and abutment elements are fixed on the central part, on either side of the groove, where these stop elements face the bearing surface of the support ring in the locking position.
  • the abutment elements are in the form of abutment plates defining flat abutment surfaces suitable to abut against the bearing surface of the bearing ring.
  • the crane may be a tower crane.
  • a step of winding the boom consisting of a disengagement of the boom so that it is free in rotation to automatically orient in the direction of the wind.
  • the stop bears on the cylinder body to a ready tolerance of the order of 0.5 to 5 centimeters.
  • the stop may actually be supported on the cylinder body (in this case the tolerance is zero), or the stop may be at a given distance (equivalent to the above tolerance) of the cylinder body.
  • this tolerance will allow to take into consideration the latency between a position detection of the stop made by a suitable sensor that will serve to control the stop of the retraction of the movable rod, and the effective stop of the movable rod in its retracting movement. This tolerance will depend in particular on the speed of retraction of the movable rod during the locking phase.
  • the crane 1 has luffing boom, shown on the figure 1 here is a tower crane which comprises a vertical mast 10 anchored or movable on the ground, surmounted, by means of an orientation device, of a rotating part 11 mainly comprising a rotating pivot 12, a counter 13 boom on which is mounted a counterweight 14, and a luffing boom 2.
  • the rotating pivot 12 is pivotable about the vertical axis of the mast 10 and supports a driving cabin 15 of the crane 1.
  • the counter-boom 13 extends substantially horizontally rearwardly from the rotating pivot 12, and in particular it carries a hoisting winch 16 for lifting the loads suspended on the boom 2, as well as the counterweight 14. This counter-boom 13 is suspended by means of tie rods 19.
  • the hoist winch 16 has a drum on which is wound a hoisting rope 17, which passes over pulleys, then is directed towards the tip 21 of the boom 2 and extends to a lifting hook 18, with or without hauling, the lifting loads being suspended from the hook 18 during the use of the crane 1.
  • the luffable boom 2 is formed by a lattice structure, for example of triangular section, and it has a proximal portion articulated around a pivot axis 22 horizontal, on the rotating pivot 12. This proximal portion 20 forms the foot of the arrow 2.
  • the proximal portion 20 has upper beams 23 and lower beams 24 interconnected by ribs and a bottom crossmember 25 at the end (i.e. opposite the pivot axis 22) and in the lower part of the proximal portion 20.
  • the upper beams 23 In the lowered configuration of the arrow 2 visible on the figures 1 and 3 when the arrow 2 is horizontal, the upper beams 23 extend substantially horizontally, while the lower beams 24 extend obliquely to the horizontal.
  • the crane 1 further comprises a lifting cylinder 3 which may be of the linear hydraulic cylinder type or linear electric cylinder.
  • This lifting cylinder 3 can act on the proximal portion 20 of the boom 2 to move the boom 2 between at least one lowered position (as visible on the figures 1 and 3 ) and at least one raised position (as visible on figures 4 and 5 ).
  • the lift cylinder 3 comprises a cylinder body 30 and a movable rod 31.
  • the movable rod 31 is mechanically connected to the proximal portion 20 of the boom 2 by a pivot connection about a main pivot axis 35, so that this proximal portion 20 is movable between the lowered position and the raised position.
  • the lift cylinder 3 makes it possible to raise or lower the boom 2, via the proximal portion 20.
  • the movable rod 31 thus has a front end 36 supporting a central articulation 38 (visible on the figure 15 ), such as a hinge joint, which mechanically connects the movable rod 31 to the proximal portion 20 and which allows pivoting about a central shaft 39 defining the main pivot axis 35, the central shaft 29 being supported by a central stirrup 26 integral with the proximal portion 20.
  • a central articulation 38 visible on the figure 15
  • the movable rod 31 is almost completely retracted inside the cylinder body 30, so that the movable rod 31 is not visible.
  • the central shaft 39 is locked in position on the central stirrup 26.
  • the support ring 42 has an annular upper surface forming a second conically shaped coupling surface 421 at a given cone angle AC, where the first mating surface 411 of the bearing ring 41 and the second coupling surface 421 of the support ring 42 are rotatably supported, thereby forming the coupling in a ball joint connection.
  • the first mating surface 411 defines a spherical mating bearing surface on the second mating surface 421 which defines a tapered female seat.
  • the support ring 42 also has an upper surface, surrounding the second coupling surface 421, and on which is fixed, in particular by means of screws 430, a locking ring 43 which is positioned above the peripheral shoulder 416. of the support ring 41.
  • this locking ring 43 and this peripheral shoulder 416 make it possible to maintain the bearing ring 41 on the support ring 42.
  • the support ring 42 also has an internal bore 423, traversed by the movable rod 31, where this internal bore 423 is mounted around the front end 34 of the cylinder body 30 and is fixedly locked by means of screws 424.
  • the lift cylinder 3 is a linear cylinder configured so that the movable rod 31 is displaceable in the cylinder body 30 between at least one deployed position (as visible on figures 4 and 5 ) and at least one retracted position to move the boom 2 in elevation and lowering between at least one raised configuration (as visible on the figures 4 and 5 ) and at least one lowered configuration (as visible on the figures 1 and 3 ).
  • the crane 1 further comprises a feed device 37 which is configured to supply energy to the lifting ram 3 so as to raise the boom 2.
  • the feed device 37 is a hydraulic unit configured to supply the lifting cylinder 3 with hydraulic energy. When energized, the lift cylinder 3 can raise the boom 2.
  • the feed device 37 is attached to the counter-boom 13 and is located relatively close to the lift cylinder 3, opposite the counterweight 14.
  • the lifting ram 3 extends in a vertical median plane of the boom 2, so that the central articulation 38 of the movable rod 31 on the proximal portion 20 of the boom 2 is located in a vertical median plane of the portion proximal 20. More specifically, the movable rod 31 is articulated on the lower crossbar 25, and more precisely in the middle of the lower crossbar 25. Thus, the central yoke 26 supporting the central shaft 39 is secured (in particular by welding or bolting ) of this lower cross 25.
  • the crane 1 further comprises a locking device 4 adapted to cooperate with the lift cylinder 3 to mechanically lock the movable rod 31 of the lift cylinder 3 in an extended safety position (visible on the figure 5 ) and thus block the arrow 2 in a raised safety configuration.
  • the stop 6 Starting from the release position to the locking position, the stop 6 follows an arc that brings it closer to the movable rod 31 to come to bear on the movable rod 31. Conversely, starting from the locking position to the release position, the stop 6 follows an arc that moves away from the movable rod 31 and the approximates the proximal portion 20 of the arrow 2.
  • the spacer 5 comprises a proximal portion 510 composed of the proximal ends 51 of the two longitudinal beams 50, where this proximal portion 510 is mechanically connected to the proximal portion 20 of the boom 2 by a pivot connection about the pivot axis main 35 which, for reminder, corresponds to the axis of pivoting of the movable rod 31 on the proximal portion 20 of the arrow 2.
  • the axis of pivoting of the spacer 5 on the proximal portion 20 and the pivot axis of the movable rod 31 on the proximal portion 20 are merged.
  • first longitudinal beam 50 is articulated on the lower cross member 25, next to the central articulation 38
  • second longitudinal beam 50 is also articulated on the lower cross member 25, the other of the central articulation 38
  • the central articulation 38 is disposed between the first articulation 71 and the second articulation 72 and, as a reminder, these three articulations 38, 71, 72 are all pivoting along the same main pivot axis 35.
  • the first hinge 71 is articulated on a first yoke (not visible in the figures) secured (particularly by welding or bolting) of the lower crossbar 25, and the second articulation 72 is articulated on a second stirrup 27 (visible on the Figures 14 and 15 ) integral (particularly by welding or bolting) of the lower cross member 25, wherein the first yoke and the second yoke 27 are disposed on either side of the central yoke 26.
  • the first hinge 71 comprises a first yoke 710 provided with two flanges 711 parallel and spaced apart from each other, where this first yoke 710 is fixed integrally, in particular by welding or bolting, on the proximal end 51 of the first beam. longitudinal 50.
  • the secondary orifices 713 are located closer to the proximal end 51 of the first longitudinal beam 50 than the main orifices 712, in other words the main orifices 712 are formed at the end of the first yoke 710.
  • the first yoke 710 is pivotally mounted around a first cylindrical shaft 714 mounted fitted inside the first bearing 713, this first shaft 714 passing through the first yoke 710 to cooperate with at least one locking member such as a pin ( as illustrated on the figure 10 ), a nut, a bush, a circlip, or any other means providing locking or translation locking of the first shaft 714 on the first yoke 710.
  • a pin as illustrated on the figure 10
  • the first hinge 71 further comprises a first support 715 which is in the form of a plate received between the two flanges 711 of the first yoke 710 and which has a housing (not visible) traversed by the first shaft 714.
  • the first shaft 714 is mounted on this first support 715, and it passes through both the first support 715 and the flanges 711 of the first yoke 710.
  • the upper shaft 718 and the lower shaft 719 respectively cooperate with at least one locking member such as a pin (as shown in FIG. figure 10 ), a nut, a bush, a circlip, or any other means providing locking or translational locking of the upper and lower shafts 718, 719 on the first stirrup.
  • a locking member such as a pin (as shown in FIG. figure 10 ), a nut, a bush, a circlip, or any other means providing locking or translational locking of the upper and lower shafts 718, 719 on the first stirrup.
  • the second hinge 72 comprises a second yoke 720 provided with two flanges 721 parallel and spaced apart from each other, where this second yoke 720 is fixed integrally, in particular by welding or bolting, on the proximal end 51 of the second beam longitudinal 50.
  • the secondary orifices 723 are located closer to the proximal end 51 of the second longitudinal beam 50 than the main orifices 722, in other words the main orifices 722 are formed at the end of the second cap 720.
  • the second yoke 720 is pivotally mounted around an eccentric system 73 designed to make up for a misalignment between the first bearing 712 and the second bearing 722, to ultimately allow alignment between the axis. pivoting of the spacer 5 on the arrow 2 and the main pivot axis 35 of the movable rod 31 on the arrow 2.
  • This eccentric system 73 comprises two cylindrical rings 730, which are identical, where rings 730 are received inside the second bearing 722. More specifically, a ring 730 is mounted fitted inside the main orifice 722 of the one of the flanges 721, and the other ring 730 is mounted fitted inside the main opening 722 of the other flange 721. Thus, the second yoke 720 is pivotally mounted around these two rings 730 of the eccentric system 73 .
  • Each ring 730 is provided with a cylindrical eccentric bore 731, that is to say that the center CA of the eccentric bore 731 is shifted relative to the center CB of the ring 730, as schematically illustrated on FIG. figure 12 .
  • Each ring 730 is also provided with peripheral orifices 732 distributed around the eccentric bore 731, where these peripheral orifices 732 are regularly distributed along a fictional circle CF centered on the center CB of the ring 730, so that the Peripheral orifices 732 are located at varying distances from the eccentric bore 731.
  • the central portion 735 of the second shaft 733 is received inside a housing 724 of a second support 725.
  • the second hinge 72 in fact comprises a second support 725 which is in the form of a plate received between the two flanges 721 of the second yoke 720 and which has a housing 724 (visible on the figures 11 and 13 ) crossed by the second shaft 733.
  • This housing 724 is an oblong housing which has a shape complementary to that of the central portion 735.
  • the central portion 735 has a substantially rectangular section and has two opposite and parallel flats.
  • the housing 724 also has a substantially rectangular shape, and the central portion 735 is mounted sliding inside housing 724 oblong, with its flats resting on the inner faces of the housing 724 to ensure good transmission of forces between the spacer 5 and the arrow 2.
  • the housing 724 thus offers a set of adjustment for the central portion 735 which authorizes, during adjustment with the eccentric system 73, a clearance for the second shaft 733 in the housing 724.
  • the second shaft 733 is mounted on the second support 725, and it passes through the second support 725 to mate with the rings 730 disposed on either side of the second support 725.
  • the eccentric system 73 is mounted on the second support 725 which is itself fixed on the arrow 2 as described below.
  • the second shaft 733 has an internal hole 740 passing through and opening in the cylindrical portions 734.
  • the eccentric system 73 also comprises an immobilizing device 736 arranged to immobilize the rings 730 on the second support 725 pivoting about the second shaft 733 in an angular position selected from several angular positions to allow the catching of a misalignment between the first bearing 712 and the second bearing 722.
  • This immobilizing device is in the form of an anchor 736 which passes through one of the peripheral orifices 732 of one of the rings 730 and which also passes through the second support 725 to pass through the same peripheral orifice 732 of the other 730.
  • the peripheral orifices 732 allow, by means of the pin 736, to immobilize each ring 730 in different angular positions around the cylindrical portions 734 of the second shaft 733; each peripheral orifice 732 corresponding to a given angular position.
  • the pin 736 passes through the second support 725 by passing through an oblong-shaped locking hole 737 formed on the second support 725.
  • the second support 725 has two 737 locking holes of oblong shape to be able to receive the pin 736 in one or the other of the 737 locking holes, which provides an additional degree of adjustment of the alignment of the axes.
  • the pin 736 cooperates with at least one locking member such as a pin (as shown in FIG. figure 11 ), a nut, a socket, a circlip, or any other means providing locking or translation locking of the pin 736 on the rings 730.
  • a locking member such as a pin (as shown in FIG. figure 11 ), a nut, a socket, a circlip, or any other means providing locking or translation locking of the pin 736 on the rings 730.
  • the eccentric system 73 also includes a locking device 738, 739 arranged to securely lock the rings 730 and the second shaft 733 to the second support 725.
  • This locking device comprises a locking rod 738 passing through the second shaft 733 (passing through through its internal hole 740) and thereby through the rings 730 and the second support 725.
  • This locking rod 738 is locked on one of the rings 730 by means of an enlarged head and / or a washer, and its free end cooperates with a clamping member, such as for example a nut 739, possibly associated with a washer, where this nut 739 is pressed against the other ring 730, thereby tightening the two rings 730 and the second shaft 733 in the second support 725, which makes it possible to lock the eccentric system 73 inside the second bearing 722 .
  • a clamping member such as for example a nut 739, possibly associated with a washer
  • the upper shaft 728 and the lower shaft 729 respectively cooperate with at least one locking member such as a pin (as shown in FIGS. figures 10 and 14 ), a nut, a bush, a circlip, or any other means providing locking or translation locking of the upper and lower shafts 728, 729 on the second stirrup 27.
  • a locking member such as a pin (as shown in FIGS. figures 10 and 14 ), a nut, a bush, a circlip, or any other means providing locking or translation locking of the upper and lower shafts 728, 729 on the second stirrup 27.
  • the second articulation 72 is configurable between a service position (visible in figure 14 ) and a retracted position (visible in figure 15 ).
  • the second support 725 is fixed and locked on the second stirrup 27 as described above, that is to say by means of the lower shaft 729 which passes through both the second stirrup 27 and the second support 725 passing through the lower orifice 727, and the upper shaft 728 which passes through both the second stirrup 27 and the second support 725 through the upper orifice 726.
  • the upper shaft 728 no longer crosses the second yoke 27 and only the lower shaft 729, remained in place on the second yoke 27, secures the second support 725 on the second yoke 27.
  • second caliper 27 This second support 725 has been tilted pivotally downwards, having pivoted around the lower shaft 729. Following this tilting of the second support 725, the second support 725 and the second clevis 720 have tilted down, thus freeing access to the central articulation 38 of the movable rod 31 on the arrow 2.
  • the second yoke 27 has concave endings 270 which are shaped to leave an axial passage for the central shaft 39 when it is withdrawn.
  • the second support 725 is locked in this retracted position by means of the upper shaft 728 which passes through the two secondary orifices 723 of the second yoke 720 and the upper orifice 726 of the second support 725. .
  • the second support 725 operates in the manner of a link between the service position and the retracted position.
  • first articulation 71 is also configurable between a service position and a retracted position, in an identical and concommittant manner to the second articulation 72.
  • the spacer 5 comprises a distal portion 520 composed of the distal ends 52 of the two longitudinal beams 50, where this distal portion 520 supports the abutment 6.
  • the two longitudinal beams 50 have a spacing sufficient to extend on either side of the movable rod 31 in the locking position.
  • the two longitudinal beams 50 extend obliquely with respect to the movable rod 31, and extend in particular parallel to the lower beams 24 of the proximal portion 20 of the arrow 2.
  • the two longitudinal beams 50 extend parallel to the movable rod 31.
  • the spacer 5 also comprises crosspieces 53 of arcuate shape, or more precisely in the form of an arch, so that the crosspieces 53 can match the movable rod 31.
  • These crosspieces 53 are positioned in the central part of the longitudinal beams 50 and connect the two longitudinal beams 50 between them.
  • the crosspieces 53 are integral with the same central part 530 extending fixedly between the two longitudinal beams 50.
  • the abutment 6 is mounted on the distal ends 52 of the two longitudinal beams 50, extending transversely between the two longitudinal beams 50.
  • This abutment 5 has an arcuate shape, or more precisely a bow shape, so that the abutment 6 can match the movable rod 31.
  • Each slide 60 is provided with a first orifice 65 passing right through, and each longitudinal beam 50 is provided, at its distal end 52, with a series of several second orifices 55 traversing from one side to the other.
  • the stop 6 is selectively adjustable in position on the spacer in a longitudinal direction 59 parallel to the longitudinal beams 50, employing locking members in the form of two locking fingers 7 which engage both in a first port 65 and in a second port 55 selected from the different second orifices 55 providing several adjustment positions.
  • Each locking pin 7 can be blocked by means of locking elements, such as for example a nut, a pin, a socket, a circlip, or any other means providing a locking or locking of the locking pin 7 on the corresponding slide.
  • locking elements such as for example a nut, a pin, a socket, a circlip, or any other means providing a locking or locking of the locking pin 7 on the corresponding slide.
  • the stop 6 is more or less close to the proximal portion 510 of the spacer 5 and the main pivot axis 35.
  • This adjustment of the position of the stop 6 on the spacer 5 will allow to adjust the length of the movable rod 31 in the extended safety position (described later) and therefore adjust the angle of the arrow 2 in the raised configuration safety, which allows an adjustment of the scope of the arrow 2 on the ground in this raised security configuration.
  • the locking device 4 further comprises an actuator which consists of a locking winch 9 (visible on the figures 2 and 3 ) equipped with a drum 90 on which is wound a locking cable 91, which passes over pulleys and guides 92 arranged on the proximal portion 20 of the arrow 2 to the spacer 5.
  • a locking winch 9 visible on the figures 2 and 3
  • a drum 90 on which is wound a locking cable 91, which passes over pulleys and guides 92 arranged on the proximal portion 20 of the arrow 2 to the spacer 5.
  • the spacer 5 comprises an anchoring element 56 (visible on the figure 7 ) on which is fixed one end of the locking cable 91.
  • This anchoring element 56 is integral with one of the crosspieces 53, and in particular the crosspiece 53 farthest from the proximal ends 51 of the longitudinal beams 50 to reduce the effort required to raise the spacer 5.
  • This locking winch 9 is fixedly mounted on the proximal portion 20 of the boom 2 and the rotation of the drum 90 is effected either manually by means of a crank 93 (as can be seen in the example of FIGS. figures 2 and 3 ) or by means of a motor in a preferred example not shown.
  • the locking device 4 thus allows the implementation of a locking sequence which results in a locking of the luffable boom 2 in the raised safety configuration (visible in FIG. figure 5 ). This locking sequence is performed in three successive phases.
  • a first phase corresponds to a service phase where the spacer 5 is in the release position (visible on the Figures 2 to 4 ) so that the movable rod 31 is free to be moved in the cylinder body 30 to act on the movement of the luffing boom 2, whether in lowering or lifting.
  • the movable rod 31 is free to be moved in the cylinder body 30 to a predefined maximum speed.
  • the movable rod 31 can be moved at the maximum speed allowed.
  • the crane 1 is in service and is used for the distribution of loads.
  • a second phase corresponds to a transition phase where, starting from the service phase, the movable rod 31 is deployed to a deployed position of transition (visible on the figure 4 ).
  • This extended transition position is beyond the extended security position (described below) and is near a maximum deployed position, or even a maximum deployed position (i.e. movable rod 31 at its maximum length output of the cylinder body 30).
  • the arrow 2 is raised to a raised transitional configuration, which is higher than the extended security position.
  • the spacer 5 is moved from its release position to its locking position (visible on the figure 4 ) being folded down on the movable rod 31.
  • a third phase corresponds to a locking phase where, following the transition phase, the movable rod 31 is retracted from the extended transition position (visible in FIG. 4) to the extended safety position (visible on the Figures 5 and 6 ) until the abutment 6 is resting on the bearing surface 410 of the bearing ring 41 so that the spacer 5 holds fixedly the movable rod 31 in the extended safety position, which results in locking the arrow 2 in the raised safety configuration.
  • the stop 6 is thus resting on the cylinder body 30, and more precisely the two abutment plates 64 rest on the bearing surface 410 of the support ring 41 .
  • a step of winding the arrow 2 consisting of a clutch release.
  • arrow 2 (by unlocking orientation brakes provided at the rotating pivot 12) so that the arrow 2 is free to rotate along a vertical axis to automatically orient in the direction of the wind.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Jib Cranes (AREA)
EP18198725.6A 2017-10-09 2018-10-04 Kran mit hochklappbarem ausleger mit verriegelungsvorrichtung des auslegers in hochgeklappter konfiguration Active EP3466863B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1759435A FR3072085B1 (fr) 2017-10-09 2017-10-09 Grue a fleche relevable avec dispositif de verrouillage de la fleche en configuration relevee

Publications (2)

Publication Number Publication Date
EP3466863A1 true EP3466863A1 (de) 2019-04-10
EP3466863B1 EP3466863B1 (de) 2020-04-29

Family

ID=60627829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18198725.6A Active EP3466863B1 (de) 2017-10-09 2018-10-04 Kran mit hochklappbarem ausleger mit verriegelungsvorrichtung des auslegers in hochgeklappter konfiguration

Country Status (5)

Country Link
US (1) US10836616B2 (de)
EP (1) EP3466863B1 (de)
CN (1) CN109626238B (de)
ES (1) ES2809747T3 (de)
FR (1) FR3072085B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016015385A1 (de) * 2016-12-22 2018-06-28 Liebherr-Werk Biberach Gmbh Kran mit Abklappausleger
US20220002119A1 (en) * 2018-10-29 2022-01-06 Boosup UM Tower crane having improved safety
DE102019110505B3 (de) * 2019-03-29 2020-06-18 Liebherr-Werk Ehingen Gmbh Teleskopausleger und Mobilkran

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WO2016201270A1 (en) * 2015-06-12 2016-12-15 Manitowoc Crane Companies, Llc Fast acting compressible stop
DE102015119381B3 (de) * 2015-11-10 2017-04-27 Terex Global Gmbh Mobilkran und Verfahren zum Abwinkeln einer Hauptauslegerverlängerung relativ zu einem Hauptausleger eines Mobilkrans
WO2017109309A1 (fr) * 2015-12-23 2017-06-29 Manitowoc Crane Group France Unité de relevage, grue à flèche relevable comprenant une telle unité de relevage et procédé d'assemblage d'une telle grue

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CN203474324U (zh) * 2013-10-14 2014-03-12 中联重科股份有限公司 起重机臂架系统及起重机
WO2016201270A1 (en) * 2015-06-12 2016-12-15 Manitowoc Crane Companies, Llc Fast acting compressible stop
DE102015119381B3 (de) * 2015-11-10 2017-04-27 Terex Global Gmbh Mobilkran und Verfahren zum Abwinkeln einer Hauptauslegerverlängerung relativ zu einem Hauptausleger eines Mobilkrans
WO2017109309A1 (fr) * 2015-12-23 2017-06-29 Manitowoc Crane Group France Unité de relevage, grue à flèche relevable comprenant une telle unité de relevage et procédé d'assemblage d'une telle grue

Also Published As

Publication number Publication date
CN109626238A (zh) 2019-04-16
FR3072085B1 (fr) 2019-11-08
ES2809747T3 (es) 2021-03-05
EP3466863B1 (de) 2020-04-29
US20190106305A1 (en) 2019-04-11
FR3072085A1 (fr) 2019-04-12
CN109626238B (zh) 2022-04-12
US10836616B2 (en) 2020-11-17

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