EP2692680A1 - Hoisting engine - Google Patents

Hoisting engine Download PDF

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Publication number
EP2692680A1
EP2692680A1 EP13178762.4A EP13178762A EP2692680A1 EP 2692680 A1 EP2692680 A1 EP 2692680A1 EP 13178762 A EP13178762 A EP 13178762A EP 2692680 A1 EP2692680 A1 EP 2692680A1
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EP
European Patent Office
Prior art keywords
connecting rod
axis
lifting
lever
machine
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
EP13178762.4A
Other languages
German (de)
French (fr)
Other versions
EP2692680B1 (en
Inventor
Nicolas Guy André Jupille
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.)
Mobilev Cranes
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Mobilev Cranes
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Filing date
Publication date
Priority claimed from FR1257494A external-priority patent/FR2994169B1/en
Application filed by Mobilev Cranes filed Critical Mobilev Cranes
Publication of EP2692680A1 publication Critical patent/EP2692680A1/en
Application granted granted Critical
Publication of EP2692680B1 publication Critical patent/EP2692680B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • 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
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/065—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted
    • 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
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07586—Suspension or mounting of wheels on chassis

Definitions

  • the present invention relates to a lifting machine with variable track, including a mini-crane.
  • the invention is particularly applicable in areas with high spatial constraints, inside or outside, for example in warehouses or factories, or on urban sites, requiring work with arrow on the side.
  • a first solution is to use a large tonnage and heavy-weight vehicle to support without a load on the side, but the size and mass of these devices do not allow them to use in environments with high spatial constraints.
  • a second solution is to use a machine equipped with stabilizers locking it to the ground, but preventing any displacement load suspended on the side.
  • Some lifting gear offers solutions to increase the stability of the machine while allowing its movement. These solutions are based on principles of widening the track of the hoist, that is to say the distance between the wheels of the same axle, for example by means of telescopic beams arranged under the chassis, between the wheels of the machine.
  • the lifting gear must have the smallest possible transverse space to facilitate their transport, or to increase their mobility in a theater of operations.
  • traditional channel widening systems often have a large transverse bulk.
  • the lifting gear is intended to evolve in environments that may have significant spatial constraints.
  • known channel widening systems often offer the possibility to widen the lane according to a predetermined number of lane values.
  • the traditional systems are limited to two or three positions corresponding to only two or three possible channel values, which does not always make it possible to adapt to an environment which would impose a value of possible path a value included between these predetermined values.
  • the present invention aims to overcome all or part of these disadvantages by providing a lifting machine with variable track, mini-crane type, offering the ability to move while carrying a load whatever the position of the arrow, with a variable channel of large amplitude and adjustable according to an infinity of possible values, while being of great transverse compactness for a minimum of size and greater maneuverability.
  • the subject of the present invention is a hoist, in particular of the mini-crane type, comprising a chassis, rolling means arranged on each side of the chassis for moving the hoist on a surface, and channel widening means for varying the track of the hoist, characterized in that the channel widening means comprises a kinematic assembly of deformable lateral scissors in a plane substantially perpendicular to the longitudinal axis X the lifting apparatus, and deformation means of the scissors between a folded position in which the path of the hoist is minimal and an extended position in which the path of the hoist is maximum, the scissors comprising at least one pair of rods arranged on one side of the chassis and above the rolling means to release the space under the chassis and between the rolling means, each pair of connecting rods being placed a first connecting rod, extending laterally from one side or an upper portion of the frame, and a second connecting rod, articulated in rotation on a support member of the rolling means about an axis X2 and on the first connecting rod about an
  • the hoist according to the invention has an advantageous kinematic deformable side scissors that can overcome possible traditional axle systems bulky space under the frame and between the rolling means and the frame. Therefore, the hoist according to the invention offers great compactness in the folded position, which gives it great maneuverability and ease of transport.
  • the kinematic assembly in deformable lateral scissors also allows to have a large amplitude of the channel.
  • the stability of the machine can be substantially increased (the rolling means apart forming both support points and counterweights); the hoist according to the invention, because of this great stability, can move while lifting a load, and whatever the position of the arrow.
  • the kinematic assembly in deformable lateral scissors offers the possibility of an infinity of possible channel values between the maximum path reached in the deployed position and the minimum path reached in the folded position. This allows the hoist to have the greatest possible route value, given the spatial constraints imposed by the environment in which it evolves.
  • the axis X3 is arranged above the segment connecting the axes X1, X2 to release the space under the deformable lateral scissors.
  • the first link has a proximal end mounted fixed relative to the frame.
  • this substantially increases the stability of the hoist during the widening kinematics or narrowing lane.
  • the proximal end of the first link is connected to the frame by at least two pivot links of substantially parallel axes X1, X1 ', the axis X3 being arranged above the segment connecting the axes X1, X2 or of the segment connecting the axes X1 ', X2 to release the space under the deformable lateral scissors.
  • the first connecting rod is connected to the chassis by a third axis pivot connection X1 ", distinct from the axes X1, X1 'and substantially parallel thereto.
  • the axis pivot links X1, X1 ' are aligned along a substantially vertical axis.
  • the third axis pivot connection X1 is arranged to form with the axis pivot links X1, X1 'a stability triangle.
  • the stability triangle formed by the axis pivot links X1, X1 ', X1 can be acutangle or rectangle.
  • the first link has a substantially flared shape with increasing enlargement from its distal end to its proximal end.
  • the angle ⁇ is acute, and preferably less than or equal to 45 °, in the folded position, and obtuse in the deployed position.
  • the only link between the second link and the chassis, except where appropriate the means of deformation, is formed by the first connecting rod.
  • the only kinematic connection between the second link and the frame is provided by the first link.
  • the deformation means comprise, for each pair of connecting rods, a jack articulated relative to the frame around an axis X4, a lever articulated with respect to the jack about an axis X5 and on the first connecting rod around an axis X6, and a transmission member arranged to transmit the rotational movements of the lever about the axis X6 to the second link in order to vary the angle ⁇ .
  • the combination of a lever with the kinematic assembly of deformable scissors makes it possible to dispense with the use of an oversized jack having to withstand significant stresses, the jack having to support in practice the deformable lateral scissors and the means of rolling, which can be suspended by the scissors when they are spaced apart and close together, and whose mass may advantageously be important to counterbalance in the deployed position.
  • the use of a lever cooperating with the side scissors makes it possible to use a cylinder with a short stroke (for example of the order of 100 mm) while retaining the benefit of a substantial widening of the track.
  • the couple of connecting rods, the lever and the transmission member delimit between them a parallelogram X3, X2, X7, X6 offset by a distance corresponding to the spacing X1, X6 with respect to the frame and deformable in a plane substantially perpendicular to the longitudinal axis X of the hoist.
  • the widening of the pathway can be consequent, and moreover, the rolling means remain stable in position during their spacing or their approximation, their axis of rotation remaining substantially horizontal.
  • the lever is articulated on the support member of the rolling means about an axis X7, the transmission member being merged with the support member of the rolling means.
  • the lever is connected to the first connecting rod by an axis X6 pivot connection arranged on an intermediate portion of the lever between a distal end and a proximal end of the lever, the distal end of the lever being connected to the jack by an X5 axis pivot connection.
  • the center distance X5, X6 forms a lever arm which can be adapted to use a cylinder of small amplitude, not oversized, and working advantageously under compression load with an advantageous inclination, the closest possible to the vertical axis Z of the hoist. This contributes to a substantial widening of the track and allows the use of large mass rolling means to counterbalance and provide more stability to the hoist of the invention.
  • the axis X2 connecting the second connecting rod to the support member of the rolling means is arranged vertically above the center of gravity of the assembly formed by the support member and the means for bearing supported by the support member.
  • the axis X2 connecting the second connecting rod to the rolling means is arranged in the vertical plane including the center of gravity of the rolling means and perpendicular to the transverse axis Y of the hoist, above this center of gravity.
  • the rolling means remain in a stable position when they are moved apart or close together, even when the rolling means are raised and suspended from the deformable lateral scissors and when their only connection with another element consists of the pivot connection or links.
  • the first connecting rod and / or the second connecting rod are each formed by two substantially parallel rods articulated around the same axes of rotation.
  • first connecting rod, the second connecting rod and / or, if appropriate, the lever can be doubled for greater rigidity, thus to better resist bending.
  • This allows for example to increase the mass of the rolling means so that they counterbalance in the deployed position and they thus contribute to increasing the stability of the hoist.
  • the channel widening means and the rolling means are substantially symmetrical with respect to a median plane perpendicular to the transverse Y axis of the hoist.
  • the rolling means are folded in contact with the frame thanks to the space released under each pair of rods.
  • the hoist according to the invention offers a great compactness in the folded position, which is advantageous both in terms of maneuverability when the hoist moves itself from one place to another , and transport since the hoist is less cumbersome when it must be transported, for example on a truck.
  • the lane extension ratio corresponding to the ratio of the lorry track in the deployed position on the track of the hoist in the folded position, is at least 1.8 for example of the order of 1.9, and preferably greater than or equal to 2.
  • the pathway can be increased by at least 80%, and preferably by 100% or more.
  • the channel I may be of the order of 1.2m to 1.3m in the folded position, and of the order of 2.4m in the deployed position.
  • the rolling means correspond to caterpillars mounted on a caterpillar support supporting the axis X2 and, where appropriate, the axis X7.
  • the tracks offer, in addition to the ability to travel over particularly rugged areas to further increase the workability of the lifting device according to the invention, a substantially larger mass to counterbalance and further stabilize the lifting gear when handling a load, especially when moving with that load.
  • the lifting apparatus comprises means for lifting the chassis, movable between a rest position in which the lifting means are at a distance from the surface on which the rolling means rest, to allow the displacement of the machine lifting means on this surface, and an output position in which the lifting means press against this surface to lift the frame so as to maintain the rolling means at a distance from this surface and thus allow the widening or narrowing of the track of the hoist.
  • the lifting means comprise at least two hydraulic legs mounted movable in substantially vertical translation under the frame.
  • the axis X3 is arranged above a horizontal plane including the axis, among the axes X1, X2, situated vertically the highest.
  • a hydraulic power unit is embedded in the chassis of the hoist.
  • the displacement means comprise a single jack for two pairs of rods arranged on either side of the frame.
  • this jack can be arranged substantially horizontally.
  • this jack can be articulated at one end to the second connecting rod of one of the couples of connecting rods and at another end to the second connecting rod of the other pair of connecting rods, so that this jack allows a synchronous deformation of the lateral scissors formed by the two pairs of rods.
  • the figures 1 and 2 show a lifting gear 1 according to one embodiment of the invention, self-propelled mini-crane type.
  • the lifting gear 1 comprises a frame 2, and rolling means arranged on each side of the frame 2.
  • the rolling means may comprise, as shown on the Figures 1 to 4 , caterpillar 4, and be mounted on a support member 6, here corresponding to a caterpillar support.
  • the lifting apparatus 1 also comprises means for widening the track intended to vary the track of the lifting apparatus 1, that is to say the distance between the rolling means, in this case the distance I between the tracks 4.
  • the channel widening means comprise a kinematic set of scissors 8 lateral deformable in a plane substantially perpendicular to the longitudinal axis X of the machine 1 lifting.
  • the lifting apparatus 1 here comprises four pairs of deformable lateral scissors 8, two on each side of the frame 2, as can be seen on the drawings. figures 1 and 2 .
  • Each pair of scissors 8 comprises at least one pair of connecting rods 10, 12, arranged on one side of the frame 2, above the tracks 4 to release the space under the frame 2 and between the tracks 4.
  • Each pair of connecting rods 10, 12 comprises a first connecting rod 10, extending laterally from one side 15 or an upper portion 17 of the frame 2, and a second connecting rod 12 articulated in rotation on the support member 6 of the tracks 4 by a pivot link X2 axis and articulated by a pivot link X3 axis on the first rod 10. Note that neither the first rod 10 nor the second rod 12 do not extend under the frame 2.
  • the first link 10 is articulated in rotation on the frame 2 by a pivot link axis X1.
  • the first link 10 is not articulated in rotation on the frame 2.
  • the first link 10 comprises a proximal end mounted fixed relative to the frame 2, which substantially increases the stability of the machine 1 during the kinematics of widening or narrowing of the track.
  • the first connecting rod 10 may also comprise a distal end connected to the second connecting rod 12, more precisely to a proximal end of the second connecting rod 12, by means of the X2 axis pivot connection.
  • the first link 10 can be connected to the frame 2 by two pivot links of axes X1, X1 'distinct and substantially parallel.
  • a third axis pivot connection X1 ", distinct from the axes X1, X1 'and substantially parallel thereto, can also connect the first link 10 to the chassis 2. It will be noted that the axis pivot links X1, X1' can be aligned along a substantially vertical axis.
  • the third axis pivot link X1 can be arranged to form a stability triangle with the axis pivot links X1, X1 ', and the axis X1" is thus arranged out of the segment connecting the axes X1 and X1'.
  • the stability triangle formed by the axis pivot links X1, X1 ', X1 " is advantageously acutangle (its angles are all acute) or rectangle, for a better distribution of the forces between these links, therefore a greater stability of the 1 lifting gear.
  • first rod 10 may have a substantially flared shape with increasing enlargement from the distal end to the proximal end, which gives it more rigidity.
  • the axis X3 may advantageously be arranged above the segment connecting the axes X1, X2 to release the space under the deformable lateral scissors 8.
  • the axis X3 can in particular be arranged above a horizontal plane including the axis, among the axes X1, X2, located vertically the highest.
  • the first connecting rod 10 and the second connecting rod 12 form an angle ⁇ between them.
  • the lifting gear 1 also comprises means for deforming the scissors 8 between a folded position, visible on the figure 3 or 5 , in which the track I of the hoist 1 is minimal, for example of the order of 1200 mm to 1300 mm, and an extended position, visible on the figure 4 or 6 , in which the track I of the hoist 1 is maximum, for example of the order of 2400 mm.
  • the lane extension ratio of the lifting gear 1 is at least 1.8, and may be of the order of 1.9 or greater than or equal to 2.
  • the pathway can be increased by at least 80%, and preferably by 100% or more.
  • the deformation means comprise, according to the example of Figures 1 to 6 , for each pair of rods 10, 12, a jack 14, fed for example by a hydraulic power unit on board 2, a lever 16, and a member 18 for transmitting forces between the lever 16 and the second connecting rod 12, arranged to pivot the second link 12 relative to the first link 10 about the axis X3 by varying the angle ⁇ between a minimum value reached in the folded position and a maximum value reached in the deployed position.
  • the angle ⁇ may be acute in the folded position, and preferably less than or equal to 45 °, and obtuse in the deployed position.
  • the jack 14 can be hinged to the frame 2 by a pivot connection of axis X4, X1 ", the axis X4, X1" is here substantially parallel to the longitudinal axis X of the machine 1 lifting. According to the example of figures 5 and 6 , the jack 14 is hinged to the frame 2 by the third axle pivot connection X1 ".
  • the lever 16 is here articulated on the cylinder 14 by a pivot connection of axis X5 and on the first connecting rod by a pivot connection axis X6.
  • the lever 16 is also articulated on the support member 6 of the tracks 4 by a pivot connection axis X7, so that the transmission member 18 here corresponds in practice to the support member 6 of the tracks 4.
  • the pair of rods 10, 12, the lever 16 and the transmission member 18 may be arranged relative to each other to form a parallelogram X3, X2, X7, X6, offset by a distance corresponding to the spacing X1 , X6 relative to the frame 2 and deformable in a plane substantially perpendicular to the longitudinal axis X of the hoist 1.
  • the X6 axis pivot connection may be arranged on an intermediate portion of the lever 16, that is to say on a portion of the lever 16 between a distal end 20 and a proximal end 22 of the lever 16, distal end 20 being connected to the cylinder 14 by the X5 axis pivot connection, to form a lever arm corresponding to the center distance X5, X6.
  • the axis X2 around which is articulated the second connecting rod 12 relative to the support member 6 of one of the tracks 4 is arranged vertically above the center of gravity of the assembly formed by the support member 6 and the track 4 which it supports, so that, when they are suspended from the second connecting rod 12, the support member 6 and the track 4 which it supports remain in a stable equilibrium position corresponding to their position of use when the tracks 4 are in contact with the ground.
  • first connecting rod 10 and / or the second connecting rod 12 can be doubled, that is to say respectively formed of two connecting rods or two substantially parallel levers and articulated around the same axes of rotation.
  • the lifting gear 1 in particular its lower part including the scissors 8, the jacks 14, the levers 16, the tracks 4 and their support member 6, or even the frame 2, is substantially symmetrical with respect to a perpendicular median plane. to the transverse Y axis of the hoist 1, that is to say a vertical plane including the longitudinal axis X of the machine 1 lifting.
  • the support members 6 of the tracks 4 can be folded against the frame 2 in the folded position, in particular thanks to the space released under each pair of rods 10, 12.
  • the latter may include means for lifting the frame 2, such as hydraulic legs 24.
  • the hydraulic crutches 24 are movable between a rest position in which they are at a distance from the surface on which the tracks 4 rest, so as not to hinder the movement of the lifting gear 1 on this surface, and an exit position in which the hydraulic crutches 24 are deployed and press against this surface to lift the frame 2 and keep the tracks 4 away from this surface, to allow to separate or bring the caterpillars 4 then suspended scissors 8.
  • the deformation means could comprise a jack 14 articulated on the frame 2 and directly on the second connecting rod 12.
  • the transmission member 18 could correspond to a connecting rod connecting the lever 16 and the second connecting rod 12; the support member 6 could then be uniquely attached to the second connecting rod 12 via the axis pivot connection X2.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Jib Cranes (AREA)

Abstract

The machine (1) has a path widening unit comprising deformable side shears (8) and a deformation unit to deform the shears between folded and deployed positions. The shears have a rod (10) extended from a side (15)/an upper portion (17) of a frame (2) and another rod (12) rotatively articulated on a support element (6) of a bearing unit and on the former rod around an axis (X3). The rods form an angle (alpha). The deformation unit is arranged to pivot the latter rod relative to the former rod around the axle while varying the angle between minimal and maximum values attained in the positions.

Description

La présente invention concerne un engin de levage à voie variable, notamment une mini-grue.The present invention relates to a lifting machine with variable track, including a mini-crane.

L'invention trouve son application notamment dans des zones à fortes contraintes spatiales, à l'intérieur ou à l'extérieur, par exemple dans des entrepôts ou des usines, ou sur des chantiers urbains, nécessitant un travail avec flèche sur le côté.The invention is particularly applicable in areas with high spatial constraints, inside or outside, for example in warehouses or factories, or on urban sites, requiring work with arrow on the side.

Il existe traditionnellement deux solutions pour soulever une charge sur le côté. Une première solution consiste à utiliser un engin de fort tonnage et à fort encombrement pour supporter sans se renverser une charge sur le côté, mais l'encombrement et la masse de ces engins ne permettent pas de les utiliser dans des environnements à forte contrainte spatiale. Une deuxième solution consiste à utiliser un engin équipé de stabilisateurs le verrouillant au sol, mais empêchant tout déplacement charge suspendue sur le côté.There are traditionally two solutions for lifting a load on the side. A first solution is to use a large tonnage and heavy-weight vehicle to support without a load on the side, but the size and mass of these devices do not allow them to use in environments with high spatial constraints. A second solution is to use a machine equipped with stabilizers locking it to the ground, but preventing any displacement load suspended on the side.

Certains engins de levage proposent des solutions permettant d'augmenter la stabilité de l'engin tout en autorisant son déplacement. Ces solutions reposent sur des principes d'élargissement de la voie de l'engin de levage, c'est-à-dire de la distance entre les roues d'un même essieu, par exemple par l'intermédiaire de poutres télescopiques agencées sous le châssis, entre les roues de l'engin.Some lifting gear offers solutions to increase the stability of the machine while allowing its movement. These solutions are based on principles of widening the track of the hoist, that is to say the distance between the wheels of the same axle, for example by means of telescopic beams arranged under the chassis, between the wheels of the machine.

Toutefois, les systèmes d'élargissement de voie traditionnels bénéficient d'une amplitude assez limitée, le rapport d'extension de voie dépassant rarement 1,2, permettant par exemple de passer d'une voie de 1 m à une voie de 1,2m. Autrement dit, la voie est rarement augmentée au-delà de 20% de sa valeur minimale. Le bénéfice en termes de stabilité s'avère par conséquent restreint, et ne permet d'envisager le déplacement de l'engin de levage alors qu'une charge est suspendue à l'extrémité de la flèche, quelque soit la position de cette dernière, par exemple d'un premier poste de travail vers un deuxième poste de travail d'un même chantier.However, traditional lane widening systems have a fairly limited amplitude, the lane extension ratio rarely exceeding 1.2, allowing for example to go from a lane of 1 m to a lane of 1.2 m . In other words, the path is rarely increased beyond 20% of its minimum value. The benefit in terms of stability is therefore limited, and does not allow to consider moving the hoist while a load is suspended at the end of the boom, whatever the position of the latter, for example from a first workstation to a second workstation of the same site.

Par ailleurs, les engins de levage doivent présenter l'encombrement transversal le plus faible possible afin de faciliter leur transport, ou bien d'accroître leur mobilité sur un théâtre d'opérations. Or les systèmes traditionnels d'élargissement de voie présentent souvent un encombrement transversal important.In addition, the lifting gear must have the smallest possible transverse space to facilitate their transport, or to increase their mobility in a theater of operations. However, traditional channel widening systems often have a large transverse bulk.

Enfin, les engins de levage sont destinés à évoluer dans des environnements qui peuvent présenter des contraintes spatiales importantes. Or les systèmes d'élargissement de voie connus offrent souvent la possibilité d'élargir la voie selon un nombre de valeurs de voie prédéterminé. En d'autres termes, les systèmes traditionnels sont limités à deux ou trois positions correspondant à seulement deux ou trois valeurs de voie possibles, ce qui ne permet pas toujours de s'adapter à un environnement qui imposerait comme valeur de voie possible une valeur comprise entre ces valeurs prédéterminées.Finally, the lifting gear is intended to evolve in environments that may have significant spatial constraints. However known channel widening systems often offer the possibility to widen the lane according to a predetermined number of lane values. In other words, the traditional systems are limited to two or three positions corresponding to only two or three possible channel values, which does not always make it possible to adapt to an environment which would impose a value of possible path a value included between these predetermined values.

Aussi la présente invention vise à pallier tout ou partie de ces inconvénients en proposant un engin de levage à voie variable, de type mini-grue, offrant la possibilité de se déplacer tout en transportant une charge quelque soit la position de la flèche, avec une voie variable d'amplitude importante et ajustable selon une infinité de valeurs possibles, tout en étant d'une grande compacité transversale pour un minimum d'encombrement et une plus grande maniabilité.Also the present invention aims to overcome all or part of these disadvantages by providing a lifting machine with variable track, mini-crane type, offering the ability to move while carrying a load whatever the position of the arrow, with a variable channel of large amplitude and adjustable according to an infinity of possible values, while being of great transverse compactness for a minimum of size and greater maneuverability.

A cet effet, la présente invention a pour objet un engin de levage, notamment de type mini-grue, comprenant un châssis, des moyens de roulement agencés de chaque côté du châssis pour le déplacement de l'engin de levage sur une surface, et des moyens d'élargissement de voie destinés à faire varier la voie de l'engin de levage, caractérisé en ce que les moyens d'élargissement de voie comprennent un ensemble cinématique en ciseaux latéraux déformables dans un plan sensiblement perpendiculaire à l'axe longitudinal X de l'engin de levage, et des moyens de déformation des ciseaux entre une position repliée dans laquelle la voie de l'engin de levage est minimale et une position déployée dans laquelle la voie de l'engin de levage est maximale, les ciseaux comprenant au moins un couple de bielles agencé sur un côté du châssis et au-dessus des moyens de roulement pour libérer l'espace sous le châssis et entre les moyens de roulement, chaque couple de bielles étant composé d'une première bielle, s'étendant latéralement depuis un côté ou une portion supérieure du châssis, et d'une deuxième bielle, articulée en rotation sur un organe de support des moyens de roulement autour d'un axe X2 et sur la première bielle autour d'un axe X3, la première bielle et la deuxième bielle formant entre elles un angle a, et les moyens de déformation étant agencés pour faire pivoter la deuxième bielle par rapport à la première bielle autour de l'axe X3 en faisant varier l'angle α entre une valeur minimale atteinte dans la position repliée et une valeur maximale atteinte dans la position déployée.For this purpose, the subject of the present invention is a hoist, in particular of the mini-crane type, comprising a chassis, rolling means arranged on each side of the chassis for moving the hoist on a surface, and channel widening means for varying the track of the hoist, characterized in that the channel widening means comprises a kinematic assembly of deformable lateral scissors in a plane substantially perpendicular to the longitudinal axis X the lifting apparatus, and deformation means of the scissors between a folded position in which the path of the hoist is minimal and an extended position in which the path of the hoist is maximum, the scissors comprising at least one pair of rods arranged on one side of the chassis and above the rolling means to release the space under the chassis and between the rolling means, each pair of connecting rods being placed a first connecting rod, extending laterally from one side or an upper portion of the frame, and a second connecting rod, articulated in rotation on a support member of the rolling means about an axis X2 and on the first connecting rod about an axis X3, the first connecting rod and the second connecting rod forming an angle α between them, and the deformation means being arranged to pivot the second connecting rod relative to the first connecting rod about the axis X3 by varying the angle α between a minimum value reached in the folded position and a maximum value reached in the deployed position.

Ainsi, l'engin de levage selon l'invention présente une cinématique avantageuse en ciseaux latéraux déformables qui permettent de s'affranchir d'éventuels systèmes traditionnels d'essieu encombrant l'espace sous le châssis et entre les moyens de roulement et le châssis. Par conséquent, l'engin de levage selon l'invention offre une grande compacité en position repliée, qui lui confère une grande maniabilité et une grande facilité de transport. L'ensemble cinématique en ciseaux latéraux déformables permet en outre de disposer d'une grande amplitude de voie. Ainsi, la stabilité de l'engin peut être sensiblement accrue (les moyens de roulement écartés formant à la fois des points d'appui et des contrepoids); l'engin de levage selon l'invention, du fait de cette grande stabilité, peut se déplacer tout en soulevant une charge, et ce quelque soit la position de la flèche. Enfin, l'ensemble cinématique en ciseaux latéraux déformables offre la possibilité d'une infinité de valeurs de voie possibles entre la voie maximale atteinte dans la position déployée et la voie minimale atteinte dans la position repliée. Cela permet à l'engin de levage de disposer de la plus grande valeur de voie possible, compte-tenu des contraintes spatiales imposées par l'environnement dans lequel il évolue.Thus, the hoist according to the invention has an advantageous kinematic deformable side scissors that can overcome possible traditional axle systems bulky space under the frame and between the rolling means and the frame. Therefore, the hoist according to the invention offers great compactness in the folded position, which gives it great maneuverability and ease of transport. The kinematic assembly in deformable lateral scissors also allows to have a large amplitude of the channel. Thus, the stability of the machine can be substantially increased (the rolling means apart forming both support points and counterweights); the hoist according to the invention, because of this great stability, can move while lifting a load, and whatever the position of the arrow. Finally, the kinematic assembly in deformable lateral scissors offers the possibility of an infinity of possible channel values between the maximum path reached in the deployed position and the minimum path reached in the folded position. This allows the hoist to have the greatest possible route value, given the spatial constraints imposed by the environment in which it evolves.

Avantageusement, l'axe X3 est agencé au-dessus du segment reliant les axes X1, X2 pour libérer l'espace situé sous les ciseaux latéraux déformables.Advantageously, the axis X3 is arranged above the segment connecting the axes X1, X2 to release the space under the deformable lateral scissors.

Selon un mode de réalisation, la première bielle présente une extrémité proximale montée fixe par rapport au châssis.According to one embodiment, the first link has a proximal end mounted fixed relative to the frame.

Ainsi, cela augmente sensiblement la stabilité de l'engin de levage lors de la cinématique d'élargissement ou de rétrécissement de voie.Thus, this substantially increases the stability of the hoist during the widening kinematics or narrowing lane.

De manière avantageuse, l'extrémité proximale de la première bielle est reliée au châssis par au moins deux liaisons pivot d'axes sensiblement parallèles X1, X1', l'axe X3 étant agencé au-dessus du segment reliant les axes X1, X2 ou du segment reliant les axes X1', X2 pour libérer l'espace situé sous les ciseaux latéraux déformables.Advantageously, the proximal end of the first link is connected to the frame by at least two pivot links of substantially parallel axes X1, X1 ', the axis X3 being arranged above the segment connecting the axes X1, X2 or of the segment connecting the axes X1 ', X2 to release the space under the deformable lateral scissors.

Avantageusement, la première bielle est reliée au châssis par une troisième liaison pivot d'axe X1", distinct des axes X1, X1' et sensiblement parallèle à ces derniers.Advantageously, the first connecting rod is connected to the chassis by a third axis pivot connection X1 ", distinct from the axes X1, X1 'and substantially parallel thereto.

Selon une possibilité, les liaisons pivot d'axes X1, X1' sont alignées le long d'un axe sensiblement vertical.According to one possibility, the axis pivot links X1, X1 'are aligned along a substantially vertical axis.

Avantageusement, la troisième liaison pivot d'axe X1" est agencée pour former avec les liaisons pivot d'axes X1, X1' un triangle de stabilité.Advantageously, the third axis pivot connection X1 "is arranged to form with the axis pivot links X1, X1 'a stability triangle.

Le triangle de stabilité formé par les liaisons pivot d'axes X1, X1', X1" peut être acutangle ou rectangle.The stability triangle formed by the axis pivot links X1, X1 ', X1 "can be acutangle or rectangle.

De manière avantageuse, la première bielle présente une forme sensiblement évasée avec un élargissement croissant partant de son extrémité distale vers son extrémité proximale.Advantageously, the first link has a substantially flared shape with increasing enlargement from its distal end to its proximal end.

Selon une forme d'exécution, l'angle α est aigu, et de préférence inférieur ou égal à 45°, dans la position repliée, et obtus dans la position déployée.According to one embodiment, the angle α is acute, and preferably less than or equal to 45 °, in the folded position, and obtuse in the deployed position.

Selon une possibilité, l'unique lien entre la deuxième bielle et le châssis, hormis le cas échéant les moyens de déformation, est formé par la première bielle.According to one possibility, the only link between the second link and the chassis, except where appropriate the means of deformation, is formed by the first connecting rod.

En d'autres termes, hormis le cas échéant les moyens de déformation, l'unique liaison cinématique entre la deuxième bielle et le châssis est assurée par la première bielle.In other words, except where appropriate the deformation means, the only kinematic connection between the second link and the frame is provided by the first link.

Selon un mode de réalisation, les moyens de déformation comprennent pour chaque couple de bielles un vérin articulé par rapport au châssis autour d'un axe X4, un levier articulé par rapport au vérin autour d'un axe X5 et sur la première bielle autour d'un axe X6, et un organe de transmission agencé pour transmettre les mouvements de rotation du levier autour de l'axe X6 à la deuxième bielle afin de faire varier l'angle α.According to one embodiment, the deformation means comprise, for each pair of connecting rods, a jack articulated relative to the frame around an axis X4, a lever articulated with respect to the jack about an axis X5 and on the first connecting rod around an axis X6, and a transmission member arranged to transmit the rotational movements of the lever about the axis X6 to the second link in order to vary the angle α.

Ainsi, la combinaison d'un levier avec l'ensemble cinématique en ciseaux déformables permet de s'affranchir de l'utilisation d'un vérin surdimensionné devant résister à des contraintes importantes, le vérin devant soutenir en pratique les ciseaux latéraux déformables et les moyens de roulement, qui peuvent être suspendus aux ciseaux lorsqu'ils sont écartés et rapprochés, et dont la masse peut avantageusement être importante pour faire contrepoids dans la position déployée. En particulier, l'utilisation d'un levier coopérant avec les ciseaux latéraux permet d'utiliser un vérin à faible course (par exemple de l'ordre de 100 mm) tout en conservant le bénéfice d'un élargissement conséquent de la voie.Thus, the combination of a lever with the kinematic assembly of deformable scissors makes it possible to dispense with the use of an oversized jack having to withstand significant stresses, the jack having to support in practice the deformable lateral scissors and the means of rolling, which can be suspended by the scissors when they are spaced apart and close together, and whose mass may advantageously be important to counterbalance in the deployed position. In particular, the use of a lever cooperating with the side scissors makes it possible to use a cylinder with a short stroke (for example of the order of 100 mm) while retaining the benefit of a substantial widening of the track.

Selon une possibilité, le couple de bielles, le levier et l'organe de transmission délimitent entre eux un parallélogramme X3, X2, X7, X6 déporté d'une distance correspondant à l'entraxe X1, X6 par rapport au châssis et déformable dans un plan sensiblement perpendiculaire à l'axe longitudinal X de l'engin de levage.According to one possibility, the couple of connecting rods, the lever and the transmission member delimit between them a parallelogram X3, X2, X7, X6 offset by a distance corresponding to the spacing X1, X6 with respect to the frame and deformable in a plane substantially perpendicular to the longitudinal axis X of the hoist.

Ainsi, du fait du caractère déporté du parallélogramme déformable ainsi formé, l'élargissement de la voie peut être conséquent, et de plus, les moyens de roulement restent stables en position lors de leur écartement ou de leur rapprochement, leur axe de rotation demeurant sensiblement horizontal.Thus, because of the deported nature of the deformable parallelogram thus formed, the widening of the pathway can be consequent, and moreover, the rolling means remain stable in position during their spacing or their approximation, their axis of rotation remaining substantially horizontal.

Selon une autre caractéristique de l'engin de levage selon l'invention, le levier est articulé sur l'organe de support des moyens de roulement autour d'un axe X7, l'organe de transmission se confondant avec l'organe de support des moyens de roulement.According to another characteristic of the hoist according to the invention, the lever is articulated on the support member of the rolling means about an axis X7, the transmission member being merged with the support member of the rolling means.

Selon une possibilité, le levier est relié à la première bielle par une liaison pivot d'axe X6 agencée sur une portion intermédiaire du levier comprise entre une extrémité distale et une extrémité proximale du levier, l'extrémité distale du levier étant reliée au vérin par une liaison pivot d'axe X5.According to one possibility, the lever is connected to the first connecting rod by an axis X6 pivot connection arranged on an intermediate portion of the lever between a distal end and a proximal end of the lever, the distal end of the lever being connected to the jack by an X5 axis pivot connection.

Ainsi, l'entraxe X5, X6 forme un bras de levier qui peut être adapté pour utiliser un vérin de faible amplitude, non surdimensionné, et travaillant avantageusement sous charge en compression avec une inclinaison avantageuse, la plus proche possible de l'axe vertical Z de l'engin de levage. Cela contribue à un élargissement conséquent de la voie et permet d'utiliser des moyens de roulement de masse importante pour faire contrepoids et procurer davantage de stabilité à l'engin de levage selon l'invention.Thus, the center distance X5, X6 forms a lever arm which can be adapted to use a cylinder of small amplitude, not oversized, and working advantageously under compression load with an advantageous inclination, the closest possible to the vertical axis Z of the hoist. This contributes to a substantial widening of the track and allows the use of large mass rolling means to counterbalance and provide more stability to the hoist of the invention.

Selon une forme d'exécution, l'axe X2 reliant la deuxième bielle à l'organe de support des moyens de roulement est agencé verticalement au-dessus du centre de gravité de l'ensemble formé par l'organe de support et les moyens de roulement supportés par l'organe de support.According to one embodiment, the axis X2 connecting the second connecting rod to the support member of the rolling means is arranged vertically above the center of gravity of the assembly formed by the support member and the means for bearing supported by the support member.

Autrement dit, l'axe X2 reliant la deuxième bielle aux moyens de roulement est agencé dans le plan vertical incluant le centre de gravité des moyens de roulement et perpendiculaire à l'axe transversal Y de l'engin de levage, au-dessus de ce centre de gravité. Ainsi, les moyens de roulement restent dans une position stable lors de leur écartement ou rapprochement, y compris lorsque les moyens de roulement sont soulevés et suspendus aux ciseaux latéraux déformables et lorsque leur seule liaison avec un autre élément consiste en la ou les liaisons pivot d'axe X2 les reliant à la ou les deuxièmes bielles.In other words, the axis X2 connecting the second connecting rod to the rolling means is arranged in the vertical plane including the center of gravity of the rolling means and perpendicular to the transverse axis Y of the hoist, above this center of gravity. Thus, the rolling means remain in a stable position when they are moved apart or close together, even when the rolling means are raised and suspended from the deformable lateral scissors and when their only connection with another element consists of the pivot connection or links. X2 axis connecting them to the second or second connecting rods.

Selon une forme d'exécution, la première bielle et/ou la deuxième bielle sont chacunes formées par deux bielles sensiblement parallèles et articulées autour des mêmes axes de rotation.According to one embodiment, the first connecting rod and / or the second connecting rod are each formed by two substantially parallel rods articulated around the same axes of rotation.

En d'autres termes, la première bielle, la deuxième bielle et/ou le cas échéant le levier peuvent être doublés pour davantage de rigidité, donc pour mieux résister à la flexion. Cela permet par exemple d'augmenter la masse des moyens de roulement pour qu'ils fassent contrepoids dans la position déployée et qu'ils contribuent ainsi à accroître la stabilité de l'engin de levage.In other words, the first connecting rod, the second connecting rod and / or, if appropriate, the lever can be doubled for greater rigidity, thus to better resist bending. This allows for example to increase the mass of the rolling means so that they counterbalance in the deployed position and they thus contribute to increasing the stability of the hoist.

Selon une caractéristique possible, les moyens d'élargissement de voie et les moyens de roulement sont sensiblement symétriques par rapport à un plan médian perpendiculaire à l'axe Y transversal de l'engin de levage.According to a possible characteristic, the channel widening means and the rolling means are substantially symmetrical with respect to a median plane perpendicular to the transverse Y axis of the hoist.

Ainsi, la stabilité de l'engin de levage est accrue.Thus, the stability of the hoist is increased.

Selon un mode de réalisation, dans la position repliée, les moyens de roulement sont rabattus au contact du châssis grâce à l'espace libéré sous chaque couple de bielles.According to one embodiment, in the folded position, the rolling means are folded in contact with the frame thanks to the space released under each pair of rods.

Ainsi, l'engin de levage selon l'invention offre une grande compacité dans la position repliée, ce qui est avantageux à la fois en termes de maniabilité lorsque l'engin de levage se déplace de lui-même d'un lieu à un autre, et de transport puisque l'engin de levage est moins encombrant lorsqu'il doit être transporté, par exemple sur un camion.Thus, the hoist according to the invention offers a great compactness in the folded position, which is advantageous both in terms of maneuverability when the hoist moves itself from one place to another , and transport since the hoist is less cumbersome when it must be transported, for example on a truck.

Selon une possibilité, le rapport d'extension de voie, correspondant au rapport de la voie de l'engin de levage dans la position déployée sur la voie de l'engin de levage dans la position repliée, est au moins égal à 1,8, par exemple de l'ordre de 1,9, et de préférence supérieur ou égal à 2.According to one possibility, the lane extension ratio, corresponding to the ratio of the lorry track in the deployed position on the track of the hoist in the folded position, is at least 1.8 for example of the order of 1.9, and preferably greater than or equal to 2.

Autrement dit, la voie peut être augmentée d'au moins 80%, et de préférence de 100% ou plus. Par exemple, la voie I peut être de l'ordre de 1,2m à 1,3m dans la position repliée, et de l'ordre de 2,4 m dans la position déployée.In other words, the pathway can be increased by at least 80%, and preferably by 100% or more. For example, the channel I may be of the order of 1.2m to 1.3m in the folded position, and of the order of 2.4m in the deployed position.

Selon un mode de réalisation, les moyens de roulement correspondent à des chenilles montées sur un support de chenille supportant l'axe X2 et, le cas échéant, l'axe X7.According to one embodiment, the rolling means correspond to caterpillars mounted on a caterpillar support supporting the axis X2 and, where appropriate, the axis X7.

Ainsi, les chenilles offrent, outre la possibilité de circuler sur des endroits particulièrement accidentés pour accroître davantage encore la maniabilité de l'engin de levage selon l'invention, une masse sensiblement plus importante pour faire contrepoids et stabiliser davantage encore l'engin de levage lorsqu'il manipule une charge, et en particulier lorsqu'il se déplace avec cette charge.Thus, the tracks offer, in addition to the ability to travel over particularly rugged areas to further increase the workability of the lifting device according to the invention, a substantially larger mass to counterbalance and further stabilize the lifting gear when handling a load, especially when moving with that load.

Selon une forme d'exécution, l'engin de levage comprend des moyens de soulèvement du châssis, mobiles entre une position de repos dans laquelle les moyens de soulèvement sont à distance de la surface sur laquelle reposent les moyens de roulement, pour permettre le déplacement de l'engin de levage sur cette surface, et une position de sortie dans laquelle les moyens de soulèvement appuient contre cette surface pour soulever le châssis de manière à maintenir les moyens de roulement à distance de cette surface et permettre ainsi l'élargissement ou le rétrécissement de la voie de l'engin de levage.According to one embodiment, the lifting apparatus comprises means for lifting the chassis, movable between a rest position in which the lifting means are at a distance from the surface on which the rolling means rest, to allow the displacement of the machine lifting means on this surface, and an output position in which the lifting means press against this surface to lift the frame so as to maintain the rolling means at a distance from this surface and thus allow the widening or narrowing of the track of the hoist.

Avantageusement, les moyens de soulèvement comprennent au moins deux béquilles hydrauliques montées mobiles en translation sensiblement verticale sous le châssis.Advantageously, the lifting means comprise at least two hydraulic legs mounted movable in substantially vertical translation under the frame.

Selon une possibilité, l'axe X3 est agencé au-dessus d'un plan horizontal incluant l'axe, parmi les axes X1, X2, situé verticalement le plus haut.According to one possibility, the axis X3 is arranged above a horizontal plane including the axis, among the axes X1, X2, situated vertically the highest.

Selon une autre caractéristique possible, une centrale hydraulique est embarquée dans le châssis de l'engin de levage.According to another possible characteristic, a hydraulic power unit is embedded in the chassis of the hoist.

Il peut être envisagé que les moyens de déplacement comprennent un unique vérin pour deux couples de bielles agencés de part et d'autre du châssis.It may be envisaged that the displacement means comprise a single jack for two pairs of rods arranged on either side of the frame.

De manière avantageuse, ce vérin peut être agencé de façon sensiblement horizontale.Advantageously, this jack can be arranged substantially horizontally.

De surcroît, ce vérin peut être articulé par une extrémité à la deuxième bielle de l'un des couples de bielles et par une autre extrémité à la deuxième bielle de l'autre couple de bielles, de sorte que ce vérin permet une déformation synchrone des ciseaux latéraux formés par les deux couples de bielles.Moreover, this jack can be articulated at one end to the second connecting rod of one of the couples of connecting rods and at another end to the second connecting rod of the other pair of connecting rods, so that this jack allows a synchronous deformation of the lateral scissors formed by the two pairs of rods.

D'autres caractéristiques et avantages ressortiront clairement de la description ci-après d'un mode de réalisation d'un engin de levage selon l'invention, donné à titre d'exemple non limitatif, en référence aux dessins annexés dans lesquels :

  • les figures 1 et 2 sont des vues de côté d'un engin de levage selon un mode de réalisation de l'invention,
  • les figures 3 et 4 sont des vues de derrière d'un engin de levage selon un mode de réalisation de l'invention, dans deux positions de fonctionnement,
  • les figures 5 et 6 sont des vues de derrière d'un engin de levage selon un autre mode de réalisation de l'invention, dans deux positions de fonctionnement.
Other features and advantages will become clear from the following description of an embodiment of a hoist according to the invention, given by way of non-limiting example, with reference to the appended drawings in which:
  • the figures 1 and 2 are side views of a hoist according to one embodiment of the invention,
  • the figures 3 and 4 are rear views of a hoist according to one embodiment of the invention, in two operating positions,
  • the figures 5 and 6 are rear views of a hoist according to another embodiment of the invention, in two operating positions.

Les figures 1 et 2 montrent un engin 1 de levage selon un mode de réalisation de l'invention, de type mini-grue automotrice.The figures 1 and 2 show a lifting gear 1 according to one embodiment of the invention, self-propelled mini-crane type.

On précise que la description est réalisée par rapport à un référentiel cartésien lié à l'engin 1 de levage, l'axe X étant orienté dans la direction longitudinale de l'engin 1 de levage, l'axe Y étant orienté dans la direction transversale de l'engin 1 de levage, et l'axe Z étant orienté dans la direction verticale de l'engin 1 de levage. Les orientations, directions, déplacements longitudinaux, transversaux, verticaux, en avant, en arrière, latéraux sont ainsi définis par rapport à ce référentiel.It is specified that the description is made with respect to a Cartesian frame of reference related to the lifting gear 1, the X axis being oriented in the longitudinal direction of the lifting gear 1, the Y axis being oriented in the transverse direction of the lifting gear 1, and the Z axis being oriented in the vertical direction of the lifting gear 1. The orientations, directions, longitudinal, transverse, vertical, forward, backward, lateral movements are thus defined with respect to this reference frame.

L'engin 1 de levage comprend un châssis 2, et des moyens de roulement agencés de chaque côté du châssis 2.The lifting gear 1 comprises a frame 2, and rolling means arranged on each side of the frame 2.

Les moyens de roulement peuvent comprendre, comme cela est représenté sur les figures 1 à 4, des chenilles 4, et être montés sur un organe 6 de support, correspondant ici à un support de chenille.The rolling means may comprise, as shown on the Figures 1 to 4 , caterpillar 4, and be mounted on a support member 6, here corresponding to a caterpillar support.

L'engin 1 de levage comprend aussi des moyens d'élargissement de voie destinés à faire varier la voie de l'engin 1 de levage, c'est-à-dire la distance entre les moyens de roulement, en l'occurrence la distance I entre les chenilles 4.The lifting apparatus 1 also comprises means for widening the track intended to vary the track of the lifting apparatus 1, that is to say the distance between the rolling means, in this case the distance I between the tracks 4.

Comme cela est illustré aux figures 3 à 6, les moyens d'élargissement de voie comprennent un ensemble cinématique en ciseaux 8 latéraux déformables dans un plan sensiblement perpendiculaire à l'axe longitudinal X de l'engin 1 de levage. L'engin 1 de levage comprend ici quatre paires de ciseaux 8 latéraux déformables, deux de chaque côté du châssis 2, comme cela est visible sur les figures 1 et 2.As illustrated in Figures 3 to 6 , the channel widening means comprise a kinematic set of scissors 8 lateral deformable in a plane substantially perpendicular to the longitudinal axis X of the machine 1 lifting. The lifting apparatus 1 here comprises four pairs of deformable lateral scissors 8, two on each side of the frame 2, as can be seen on the drawings. figures 1 and 2 .

Chaque paire de ciseaux 8 comprend au moins un couple de bielles 10, 12, agencé sur un côté du châssis 2, au-dessus des chenilles 4 pour libérer l'espace sous le châssis 2 et entre les chenilles 4.Each pair of scissors 8 comprises at least one pair of connecting rods 10, 12, arranged on one side of the frame 2, above the tracks 4 to release the space under the frame 2 and between the tracks 4.

Chaque couple de bielles 10, 12 comprend une première bielle 10, s'étendant latéralement depuis un côté 15 ou une portion supérieure 17 du châssis 2, et une deuxième bielle 12, articulée en rotation sur l'organe 6 de support des chenilles 4 par une liaison pivot d'axe X2 et articulée par une liaison pivot d'axe X3 sur la première bielle 10. On notera que ni la première bielle 10 ni la deuxième bielle 12 ne s'étendent sous le châssis 2.Each pair of connecting rods 10, 12 comprises a first connecting rod 10, extending laterally from one side 15 or an upper portion 17 of the frame 2, and a second connecting rod 12 articulated in rotation on the support member 6 of the tracks 4 by a pivot link X2 axis and articulated by a pivot link X3 axis on the first rod 10. Note that neither the first rod 10 nor the second rod 12 do not extend under the frame 2.

Selon le mode de réalisation des figures 3 et 4, la première bielle 10 est articulée en rotation sur le châssis 2 par une liaison pivot d'axe X1.According to the embodiment of figures 3 and 4 , the first link 10 is articulated in rotation on the frame 2 by a pivot link axis X1.

Selon le mode de réalisation des figures 5 et 6, la première bielle 10 n'est pas articulée en rotation sur le châssis 2. Selon ce mode de réalisation, la première bielle 10 comprend une extrémité proximale montée fixe par rapport au châssis 2, ce qui augmente sensiblement la stabilité de l'engin 1 de levage lors de la cinématique d'élargissement ou de rétrécissement de voie.According to the embodiment of figures 5 and 6 , the first link 10 is not articulated in rotation on the frame 2. According to this embodiment, the first link 10 comprises a proximal end mounted fixed relative to the frame 2, which substantially increases the stability of the machine 1 during the kinematics of widening or narrowing of the track.

Toujours selon le mode de réalisation des figures 5 et 6, la première bielle 10 peut aussi comprendre une extrémité distale, reliée à la deuxième bielle 12, plus précisément à une extrémité proximale de la deuxième bielle 12, par la liaison pivot d'axe X2.Still according to the embodiment of the figures 5 and 6 the first connecting rod 10 may also comprise a distal end connected to the second connecting rod 12, more precisely to a proximal end of the second connecting rod 12, by means of the X2 axis pivot connection.

Selon l'exemple des figures 5 et 6, la première bielle 10 peut être reliée au châssis 2 par deux liaisons pivot d'axes X1, X1' distincts et sensiblement parallèles. Une troisième liaison pivot d'axe X1", distinct des axes X1, X1' et sensiblement parallèle à ces derniers, peut également relier la première bielle 10 au châssis 2. On notera que les liaisons pivot d'axes X1, X1' peuvent être alignées le long d'un axe sensiblement vertical.According to the example of figures 5 and 6 , the first link 10 can be connected to the frame 2 by two pivot links of axes X1, X1 'distinct and substantially parallel. A third axis pivot connection X1 ", distinct from the axes X1, X1 'and substantially parallel thereto, can also connect the first link 10 to the chassis 2. It will be noted that the axis pivot links X1, X1' can be aligned along a substantially vertical axis.

Comme on peut le voir sur les figures 5 et 6, la troisième liaison pivot d'axe X1" peut être agencée pour former avec les liaisons pivot d'axes X1, X1' un triangle de stabilité. L'axe X1" est ainsi agencé hors du segment reliant les axes X1 et X1'. Le triangle de stabilité formé par les liaisons pivot d'axes X1, X1', X1" est avantageusement acutangle (ses angles sont tous aigus) ou rectangle, pour une meilleure répartition des efforts entre ces liaisons, donc une plus grande stabilité de l'engin 1 de levage.As can be seen on the figures 5 and 6 the third axis pivot link X1 "can be arranged to form a stability triangle with the axis pivot links X1, X1 ', and the axis X1" is thus arranged out of the segment connecting the axes X1 and X1'. The stability triangle formed by the axis pivot links X1, X1 ', X1 "is advantageously acutangle (its angles are all acute) or rectangle, for a better distribution of the forces between these links, therefore a greater stability of the 1 lifting gear.

On notera que la première bielle 10 peut présenter une forme sensiblement évasée avec un élargissement croissant partant de l'extrémité distale vers l'extrémité proximale, ce qui lui procure davantage de rigidité.Note that the first rod 10 may have a substantially flared shape with increasing enlargement from the distal end to the proximal end, which gives it more rigidity.

Comme cela est visible sur les figures 3 à 6, l'axe X3 peut-être avantageusement agencé au-dessus du segment reliant les axes X1, X2 pour libérer l'espace situé sous les ciseaux 8 latéraux déformables. L'axe X3 peut en particulier être agencé au-dessus d'un plan horizontal incluant l'axe, parmi les axes X1, X2, situé verticalement le plus haut.As is visible on the Figures 3 to 6 , the axis X3 may advantageously be arranged above the segment connecting the axes X1, X2 to release the space under the deformable lateral scissors 8. The axis X3 can in particular be arranged above a horizontal plane including the axis, among the axes X1, X2, located vertically the highest.

On notera que l'unique lien entre la deuxième bielle 12 et le châssis 2 est formé par la première bielle 10, abstraction faite des moyens de déformation qui seront décrits plus en détails ci-après.It will be noted that the only link between the second connecting rod 12 and the chassis 2 is formed by the first link 10, apart from the deformation means which will be described in more detail below.

Comme on peut le constater sur les figures 3 à 6, la première bielle 10 et la deuxième bielle 12 forment entre elles un angle α.As can be seen from the Figures 3 to 6 the first connecting rod 10 and the second connecting rod 12 form an angle α between them.

L'engin 1 de levage comprend également des moyens de déformation des ciseaux 8 entre une position repliée, visible sur la figure 3 ou 5, dans laquelle la voie I de l'engin 1 de levage est minimale, par exemple de l'ordre de 1200 mm à 1300 mm, et une position déployée, visible sur la figure 4 ou 6, dans laquelle la voie I de l'engin 1 de levage est maximale, par exemple de l'ordre de 2400 mm. Ainsi, on notera que le rapport d'extension de voie de l'engin 1 de levage est au moins égal à 1,8, et peut être de l'ordre de 1,9 ou supérieur ou égal à 2. Autrement dit, la voie peut être augmentée d'au moins 80%, et de préférence de 100% ou plus.The lifting gear 1 also comprises means for deforming the scissors 8 between a folded position, visible on the figure 3 or 5 , in which the track I of the hoist 1 is minimal, for example of the order of 1200 mm to 1300 mm, and an extended position, visible on the figure 4 or 6 , in which the track I of the hoist 1 is maximum, for example of the order of 2400 mm. Thus, it will be noted that the lane extension ratio of the lifting gear 1 is at least 1.8, and may be of the order of 1.9 or greater than or equal to 2. In other words, the pathway can be increased by at least 80%, and preferably by 100% or more.

Les moyens de déformation comprennent, selon l'exemple des figures 1 à 6, pour chaque couple de bielles 10, 12, un vérin 14, alimenté par exemple par une centrale hydraulique embarquée dans le châssis 2, un levier 16, et un organe 18 de transmission d'efforts entre le levier 16 et la deuxième bielle 12, agencés pour faire pivoter la deuxième bielle 12 par rapport à la première bielle 10 autour de l'axe X3 en faisant varier l'angle α entre une valeur minimale atteinte dans la position repliée et une valeur maximale atteinte dans la position déployée.The deformation means comprise, according to the example of Figures 1 to 6 , for each pair of rods 10, 12, a jack 14, fed for example by a hydraulic power unit on board 2, a lever 16, and a member 18 for transmitting forces between the lever 16 and the second connecting rod 12, arranged to pivot the second link 12 relative to the first link 10 about the axis X3 by varying the angle α between a minimum value reached in the folded position and a maximum value reached in the deployed position.

Comme cela est visible sur les figures 3 à 6, l'angle α peut être aigu dans la position repliée, et de préférence inférieur ou égal à 45°, et obtus dans la position déployée.As is visible on the Figures 3 to 6 , the angle α may be acute in the folded position, and preferably less than or equal to 45 °, and obtuse in the deployed position.

Le vérin 14 peut être articulé sur le châssis 2 par une liaison pivot d'axe X4, X1". L'axe X4, X1" est ici sensiblement parallèle à l'axe X longitudinal de l'engin 1 de levage. Selon l'exemple des figures 5 et 6, le vérin 14 est articulé sur le châssis 2 par la troisième liaison pivot d'axe X1".The jack 14 can be hinged to the frame 2 by a pivot connection of axis X4, X1 ", the axis X4, X1" is here substantially parallel to the longitudinal axis X of the machine 1 lifting. According to the example of figures 5 and 6 , the jack 14 is hinged to the frame 2 by the third axle pivot connection X1 ".

Le levier 16 est ici articulé sur le vérin 14 par une liaison pivot d'axe X5 et sur la première bielle par une liaison pivot d'axe X6.The lever 16 is here articulated on the cylinder 14 by a pivot connection of axis X5 and on the first connecting rod by a pivot connection axis X6.

Selon le mode de réalisation représenté sur les figures 1 à 6, le levier 16 est aussi articulé sur l'organe 6 de support des chenilles 4 par une liaison pivot d'axe X7, de sorte que l'organe 18 de transmission correspond ici en pratique à l'organe 6 de support des chenilles 4.According to the embodiment shown on the Figures 1 to 6 , the lever 16 is also articulated on the support member 6 of the tracks 4 by a pivot connection axis X7, so that the transmission member 18 here corresponds in practice to the support member 6 of the tracks 4.

Le couple de bielles 10, 12, le levier 16 et l'organe 18 de transmission peuvent être agencés les uns par rapport aux autres pour former un parallélogramme X3, X2, X7, X6, déporté d'une distance correspondant à l'entraxe X1, X6 par rapport au châssis 2 et déformable dans un plan sensiblement perpendiculaire à l'axe longitudinal X de l'engin 1 de levage.The pair of rods 10, 12, the lever 16 and the transmission member 18 may be arranged relative to each other to form a parallelogram X3, X2, X7, X6, offset by a distance corresponding to the spacing X1 , X6 relative to the frame 2 and deformable in a plane substantially perpendicular to the longitudinal axis X of the hoist 1.

On notera que la liaison pivot d'axe X6 peut être agencée sur une portion intermédiaire du levier 16, c'est-à-dire sur une portion du levier 16 comprise entre une extrémité distale 20 et une extrémité proximale 22 du levier 16, l'extrémité distale 20 étant reliée au vérin 14 par la liaison pivot d'axe X5, pour former un bras de levier correspondant à l'entraxe X5, X6.It will be noted that the X6 axis pivot connection may be arranged on an intermediate portion of the lever 16, that is to say on a portion of the lever 16 between a distal end 20 and a proximal end 22 of the lever 16, distal end 20 being connected to the cylinder 14 by the X5 axis pivot connection, to form a lever arm corresponding to the center distance X5, X6.

De manière avantageuse, l'axe X2 autour duquel est articulée la deuxième bielle 12 par rapport à l'organe 6 de support de l'une des chenilles 4 est agencé verticalement au-dessus du centre de gravité de l'ensemble formé par l'organe 6 de support et la chenille 4 qu'il supporte, de sorte que, lorsqu'ils sont suspendus à la deuxième bielle 12, l'organe 6 de support et la chenille 4 qu'il supporte restent dans une position d'équilibre stable correspondant à leur position d'utilisation lorsque les chenilles 4 sont au contact du sol.Advantageously, the axis X2 around which is articulated the second connecting rod 12 relative to the support member 6 of one of the tracks 4 is arranged vertically above the center of gravity of the assembly formed by the support member 6 and the track 4 which it supports, so that, when they are suspended from the second connecting rod 12, the support member 6 and the track 4 which it supports remain in a stable equilibrium position corresponding to their position of use when the tracks 4 are in contact with the ground.

Comme cela est visible sur les figures 1 et 2, la première bielle 10 et/ou la deuxième bielle 12, mais aussi éventuellement le levier 16 peuvent être doublés, c'est-à-dire respectivement formés de deux bielles ou deux leviers sensiblement parallèles et articulées autour des mêmes axes de rotation.As is visible on the figures 1 and 2 , the first connecting rod 10 and / or the second connecting rod 12, but also possibly the lever 16 can be doubled, that is to say respectively formed of two connecting rods or two substantially parallel levers and articulated around the same axes of rotation.

L'engin 1 de levage, en particulier sa partie basse incluant les ciseaux 8, les vérins 14, les leviers 16, les chenilles 4 et leur organe 6 de support, voire le châssis 2, est sensiblement symétrique par rapport à un plan médian perpendiculaire à l'axe Y transversal de l'engin 1 de levage, c'est-à-dire un plan vertical incluant l'axe X longitudinal de l'engin 1 de levage.The lifting gear 1, in particular its lower part including the scissors 8, the jacks 14, the levers 16, the tracks 4 and their support member 6, or even the frame 2, is substantially symmetrical with respect to a perpendicular median plane. to the transverse Y axis of the hoist 1, that is to say a vertical plane including the longitudinal axis X of the machine 1 lifting.

Comme on peut le voir sur la figure 3 et sur la figure 5, les organes 6 de support des chenilles 4 peuvent être rabattus contre le châssis 2 dans la position repliée, notamment grâce à l'espace libéré sous chaque couple de bielles 10, 12.As can be seen on the figure 3 and on the figure 5 , the support members 6 of the tracks 4 can be folded against the frame 2 in the folded position, in particular thanks to the space released under each pair of rods 10, 12.

On notera que, pour permettre l'élargissement ou le rétrécissement de la voie de l'engin 1 de levage, ce dernier peut comprendre des moyens de soulèvement du châssis 2, comme des béquilles 24 hydrauliques. Les béquilles 24 hydrauliques sont mobiles entre une position de repos dans laquelle elles sont à distance de la surface sur laquelle reposent les chenilles 4, pour ne pas entraver le déplacement de l'engin 1 de levage sur cette surface, et une position de sortie dans laquelle les béquilles 24 hydrauliques sont déployées et appuient contre cette surface pour soulever le châssis 2 et maintenir les chenilles 4 à distance de cette surface, afin de permettre d'écarter ou rapprocher les chenilles 4 alors suspendues aux ciseaux 8.Note that, to allow widening or narrowing of the path of the lifting gear 1, the latter may include means for lifting the frame 2, such as hydraulic legs 24. The hydraulic crutches 24 are movable between a rest position in which they are at a distance from the surface on which the tracks 4 rest, so as not to hinder the movement of the lifting gear 1 on this surface, and an exit position in which the hydraulic crutches 24 are deployed and press against this surface to lift the frame 2 and keep the tracks 4 away from this surface, to allow to separate or bring the caterpillars 4 then suspended scissors 8.

Bien entendu, l'invention n'est nullement limitée au mode de réalisation décrit ci-dessus, ce mode de réalisation n'ayant été donné qu'à titre d'exemple. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par la substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.Of course, the invention is not limited to the embodiment described above, this embodiment having been given as an example. Modifications are possible, particularly from the point of view of the constitution of the various elements or by the substitution of technical equivalents, without departing from the scope of protection of the invention.

Ainsi, au lieu de comprendre un levier 16 et un organe 18 de transmission, les moyens de déformation pourraient comprendre un vérin 14 articulé sur le châssis 2 et directement sur la deuxième bielle 12.Thus, instead of including a lever 16 and a transmission member 18, the deformation means could comprise a jack 14 articulated on the frame 2 and directly on the second connecting rod 12.

Ainsi, au lieu de se confondre avec l'organe 6 de support, l'organe 18 de transmission pourrait correspondre à une bielle reliant le levier 16 et la deuxième bielle 12 ; l'organe 6 de support pourrait alors être uniquement rattaché à la deuxième bielle 12 via la liaison pivot d'axe X2.Thus, instead of being confused with the support member 6, the transmission member 18 could correspond to a connecting rod connecting the lever 16 and the second connecting rod 12; the support member 6 could then be uniquely attached to the second connecting rod 12 via the axis pivot connection X2.

Claims (11)

Engin (1) de levage, notamment de type mini-grue, comprenant un châssis (2), des moyens de roulement agencés de chaque côté du châssis (2) pour le déplacement de l'engin (1) de levage sur une surface, et des moyens d'élargissement de voie destinés à faire varier la voie de l'engin (1) de levage, caractérisé en ce que les moyens d'élargissement de voie comprennent un ensemble cinématique en ciseaux (8) latéraux déformables dans un plan sensiblement perpendiculaire à l'axe longitudinal (X) de l'engin (1) de levage, et des moyens de déformation des ciseaux (8) entre une position repliée dans laquelle la voie de l'engin (1) de levage est minimale et une position déployée dans laquelle la voie de l'engin (1) de levage est maximale, les ciseaux (8) comprenant au moins un couple de bielles (10, 12) agencé sur un côté du châssis (2) et au-dessus des moyens de roulement pour libérer l'espace sous le châssis (2) et entre les moyens de roulement, chaque couple de bielles (10, 12) étant composé d'une première bielle (10), s'étendant latéralement depuis un côté (15) ou une portion supérieure (17) du châssis (2), et d'une deuxième bielle (12), articulée en rotation sur un organe (6) de support des moyens de roulement autour d'un axe (X2) et sur la première bielle (10) autour d'un axe (X3), la première bielle (10) et la deuxième bielle (12) formant entre elles un angle (α), et les moyens de déformation étant agencés pour faire pivoter la deuxième bielle (12) par rapport à la première bielle (10) autour de l'axe (X3) en faisant varier l'angle (α) entre une valeur minimale atteinte dans la position repliée et une valeur maximale atteinte dans la position déployée.Lifting apparatus (1), in particular of the mini-crane type, comprising a chassis (2), rolling means arranged on each side of the chassis (2) for moving the machine (1) on a surface, and lane widening means for varying the path of the lifting apparatus (1), characterized in that the lane widening means comprise a scissor-shaped lateral kinematic assembly (8) deformable in a plane substantially perpendicular to the longitudinal axis (X) of the lifting machine (1), and means of deformation of the scissors (8) between a folded position in which the path of the machine (1) of lifting is minimal and a deployed position in which the path of the machine (1) lifting is maximum, the scissors (8) comprising at least a pair of connecting rods (10, 12) arranged on one side of the frame (2) and above the means for releasing the space under the chassis (2) and between the rolling means, each pair of connecting rods (10, 12) being composed of a first connecting rod (10), extending laterally from one side (15) or an upper portion (17) of the frame (2), and a second connecting rod (12), articulated in rotation on a support member (6) for rolling means around an axis (X2) and on the first connecting rod (10) about an axis (X3), the first connecting rod (10) and the second connecting rod ( 12) forming between them an angle (α), and the deformation means being arranged to pivot the second connecting rod (12) with respect to the first connecting rod (10) about the axis (X3) by varying the angle (α) between a minimum value reached in the folded position and a maximum value reached in the deployed position. Engin (1) de levage selon la revendication 1, caractérisé en ce que la première bielle (10) présente une extrémité proximale montée fixe par rapport au châssis (2).Lifting apparatus (1) according to claim 1, characterized in that the first connecting rod (10) has a proximal end fixedly mounted relative to the frame (2). Engin (1) de levage selon la revendication 2, caractérisé en ce que l'extrémité proximale de la première bielle (10) est reliée au châssis (2) par au moins deux liaisons pivot d'axes sensiblement parallèles (X1, X1'), l'axe (X3) étant agencé au-dessus du segment reliant les axes (X1, X2) ou du segment reliant les axes (X1', X2) pour libérer l'espace situé sous les ciseaux latéraux déformables.Lifting machine (1) according to claim 2, characterized in that the proximal end of the first connecting rod (10) is connected to the frame (2) by at least two pivot links of substantially parallel axes (X1, X1 '). , the axis (X3) being arranged above the segment connecting the axes (X1, X2) or the segment connecting the axes (X1 ', X2) to release the space under the deformable lateral scissors. Engin (1) de levage selon l'une des revendications 1 à 3, caractérisé en ce que l'angle (α) est aigu, et de préférence inférieur ou égal à 45°, dans la position repliée, et obtus dans la position déployée.Lifting machine (1) according to one of claims 1 to 3, characterized in that the angle (α) is acute, and preferably less than or equal to 45 °, in the folded position, and obtuse in the deployed position . Engin (1) de levage selon l'une des revendications 1 à 4, caractérisé en ce que l'unique lien entre la deuxième bielle (12) et le châssis (2), hormis le cas échéant les moyens de déformation, est formé par la première bielle (10).Lifting machine (1) according to one of Claims 1 to 4, characterized in that the only connection between the second connecting rod (12) and the chassis (2), except, where appropriate, the deformation means, is formed by the first connecting rod (10). Engin (1) selon l'une des revendications 1 à 5, caractérisé en ce que les moyens de déformation comprennent pour chaque couple de bielles (10, 12) un vérin (14) articulé par rapport au châssis (2) autour d'un axe (X4, X1 "), un levier (16) articulé par rapport au vérin (14) autour d'un axe (X5) et sur la première bielle (10) autour d'un axe (X6), et un organe (18) de transmission agencé pour transmettre les mouvements de rotation du levier (16) autour de l'axe (X6) à la deuxième bielle (12) afin de faire varier l'angle (α).Machine (1) according to one of claims 1 to 5, characterized in that the deformation means comprise for each pair of rods (10, 12) a jack (14) hinged relative to the frame (2) around a axis (X4, X1 "), a lever (16) articulated with respect to the jack (14) about an axis (X5) and on the first link (10) about an axis (X6), and a member ( 18) for transmitting the rotational movements of the lever (16) about the axis (X6) to the second connecting rod (12) to vary the angle (α). Engin (1) de levage selon la revendication 6, caractérisé en ce que le couple de bielles (10, 12), le levier (16) et l'organe (18) de transmission délimitent entre eux un parallélogramme (X3, X2, X7, X6) déporté d'une distance correspondant à l'entraxe (X1, X6) par rapport au châssis (2) et déformable dans un plan sensiblement perpendiculaire à l'axe longitudinal (X) de l'engin (1) de levage.Lifting apparatus (1) according to claim 6, characterized in that the pair of connecting rods (10, 12), the lever (16) and the transmission member (18) delimit between them a parallelogram (X3, X2, X7 , X6) offset by a distance corresponding to the spacing (X1, X6) relative to the frame (2) and deformable in a plane substantially perpendicular to the longitudinal axis (X) of the machine (1) lifting. Engin (1) de levage selon la revendication 6 ou 7, caractérisé en ce que le levier (16) est articulé sur l'organe (6) de support des moyens de roulement autour d'un axe (X7), l'organe (18) de transmission se confondant avec l'organe (6) de support des moyens de roulement.Machine (1) lifting device according to Claim 6 or 7, characterized in that the lever (16) is articulated on the member (6) for supporting the rolling means about an axis (X7), the body ( 18) of transmission merging with the member (6) for supporting the rolling means. Engin (1) de levage selon l'une des revendications 6 à 8, caractérisé en ce que le levier (16) est relié à la première bielle (10) par une liaison pivot d'axe (X6) agencée sur une portion intermédiaire du levier (16) comprise entre une extrémité distale (20) et une extrémité proximale (22) du levier (16), l'extrémité distale (20) du levier (16) étant reliée au vérin (14) par une liaison pivot d'axe (X5).Lifting device (1) according to one of claims 6 to 8, characterized in that the lever (16) is connected to the first connecting rod (10) by a pin pivot connection (X6) arranged on an intermediate portion of the lever (16) between a distal end (20) and a proximal end (22) of the lever (16), the distal end (20) of the lever (16) being connected to the ram (14) by a pivot connection of axis (X5). Engin (1) de levage selon l'une des revendications 1 à 8, caractérisé en ce que l'axe (X2) reliant la deuxième bielle (12) à l'organe (6) de support des moyens de roulement est agencé verticalement au-dessus du centre de gravité de l'ensemble formé par l'organe (6) de support et les moyens de roulement supportés par l'organe (6) de support.Lifting machine (1) according to one of claims 1 to 8, characterized in that the axis (X2) connecting the second connecting rod (12) to the support member (6) of the rolling means is arranged vertically at above the center of gravity of the assembly formed by the support member (6) and the rolling means supported by the support member (6). Engin (1) de levage selon l'une des revendications 1 à 10, caractérisé en ce que la première bielle (10) et/ou la deuxième bielle (12) sont chacunes formées par deux bielles sensiblement parallèles et articulées autour des mêmes axes de rotation.Lifting machine (1) according to one of claims 1 to 10, characterized in that the first connecting rod (10) and / or the second connecting rod (12) are each formed by two substantially parallel connecting rods articulated around the same axes of rotation.
EP13178762.4A 2012-08-01 2013-07-31 Hoisting engine Active EP2692680B1 (en)

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FR1257494A FR2994169B1 (en) 2012-08-01 2012-08-01 LIFTING EQUIPMENT
FR1350586A FR2994171B1 (en) 2012-08-01 2013-01-23 LIFTING EQUIPMENT

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WO1985002361A1 (en) * 1983-12-02 1985-06-06 Littman Erwin J Prime mover
WO1992010391A1 (en) * 1990-12-07 1992-06-25 Peter Eriksson A device in vehicles
JPH0796869A (en) * 1993-09-29 1995-04-11 Komatsu Ltd Undercarriage for crawler type building machine
EP2374635A1 (en) * 2010-04-09 2011-10-12 Haulotte Group Axle system, axle module including at least one such axle system, and vehicle including at least one such module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985002361A1 (en) * 1983-12-02 1985-06-06 Littman Erwin J Prime mover
WO1992010391A1 (en) * 1990-12-07 1992-06-25 Peter Eriksson A device in vehicles
JPH0796869A (en) * 1993-09-29 1995-04-11 Komatsu Ltd Undercarriage for crawler type building machine
EP2374635A1 (en) * 2010-04-09 2011-10-12 Haulotte Group Axle system, axle module including at least one such axle system, and vehicle including at least one such module

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FR2994171B1 (en) 2014-08-08
EP2692680B1 (en) 2016-01-20
ES2568229T3 (en) 2016-04-28
CA2822721A1 (en) 2014-02-01
FR2994171A1 (en) 2014-02-07

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