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EP2910513A1 - Lifting apparatus with a height regulating device - Google Patents

Lifting apparatus with a height regulating device Download PDF

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Publication number
EP2910513A1
EP2910513A1 EP15155725.3A EP15155725A EP2910513A1 EP 2910513 A1 EP2910513 A1 EP 2910513A1 EP 15155725 A EP15155725 A EP 15155725A EP 2910513 A1 EP2910513 A1 EP 2910513A1
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EP
European Patent Office
Prior art keywords
frame
lifting
gear
lifting apparatus
relative
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.)
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Application number
EP15155725.3A
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German (de)
French (fr)
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
Original Assignee
Mobilev Cranes
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Filing date
Publication date
Application filed by Mobilev Cranes filed Critical Mobilev Cranes
Publication of EP2910513A1 publication Critical patent/EP2910513A1/en
Withdrawn legal-status Critical Current

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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
    • B66C23/18—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
    • B66C23/48—Manually-movable jib cranes for use in workshops

Definitions

  • the present invention relates to a hoist, including a mini-crane.
  • the mini-crane type lifting apparatus comprises a frame, a boom mounted on the chassis for lifting a load, a front axle and a rear axle supporting the chassis, the rear axle being pivotally mounted relative to the chassis around the axle. a substantially vertical axis to allow an operator to maneuver the hoist.
  • the chassis is relatively low compared to the rear axle. This can be a problem when moving mini-cranes, especially when the surface on which the mini-crane is moved is irregular or when the mini-crane has to go through a vertical ramp connecting two surfaces at different altitudes, as the Bottom of the chassis may rub or stumble against a step or slight obstacle.
  • mini-crane type lifting gear is conventionally designed for use in places with high spatial constraints, such as factories or construction sites. It is therefore important to have compact and manoeuvrable hoisting equipment.
  • mini-cranes can have a mass of several tons.
  • the mini-cranes must therefore offer the most possible guarantees in terms of stability to prevent accidental tipping that can lead to injury or damage to property.
  • the present invention aims to overcome all or part of these disadvantages by providing a compact lifting device, manageable, stable, can be moved without difficulty on an uneven surface.
  • the subject of the present invention is a lifting machine comprising an arrow intended to lift a load, a chassis to which the boom is connected, and a rear axle for partially supporting the chassis, characterized in that the machine lifting comprises connecting means connecting the rear axle and the chassis, the connecting means being configured to allow a substantially vertical movement of the rear axle relative to the chassis between a first position in which the rear axle is positioned relative to the chassis so that the ground clearance of the hoist is minimal and a second position in which the rear axle is positioned relative to the chassis so that the ground clearance of the hoist is maximum, and in that the lifting gear includes means designed to move the rear axle between the first position and the second position.
  • the ground clearance of the hoist according to the invention is adjustable. This allows the handling of the hoist on uneven surfaces, for example presenting an obstacle such as a step.
  • the drive means comprise a hydraulic cylinder and a pressure sensor configured to detect a predetermined threshold pressure value in a cylinder chamber.
  • An advantage of these features is to avoid a tilting of the hoist when the hoist moves a load.
  • control means can automatically stop the movement of the arrow.
  • the control means may further control a movement of the arrow which is the opposite of that which caused the variation of pressure in the inner chamber of the cylinder, so that the arrow returns to a more stable position.
  • the connecting means comprise two connecting rods, each rod comprising a first end pivotally mounted relative to the chassis and a second end connected to the rear axle by a pivot connection, the two rods being arranged relative to each other. to the other in deformable parallelogram.
  • the hydraulic cylinder comprises an end connected to the rear axle by a pivot connection, and an end pivotally mounted relative to the chassis.
  • An advantage of this feature is to add an additional connection between the rear axle and the chassis, in addition to those made by the connecting rods, to limit any angular movement possible between the rear axle and the connecting rods. This prevents pitching movement of the rear axle relative to the chassis. The life of the rear axle is significantly improved.
  • the connecting means comprise two pairs of rods substantially symmetrical with respect to a median longitudinal plane of the hoist, each pair of rods forming a deformable parallelogram connecting the rear axle to the chassis.
  • An advantage of these features is better resistance to a relative longitudinal axis torque between the rear axle and the chassis, especially when a load is raised laterally. This improves the service life of the link between the rear axle and the chassis.
  • each connecting rod extends obliquely relative to a transverse plane of the hoist, so that the substantially symmetrical connecting rods of each pair form a V.
  • An advantage of this feature is an improved recovery of transverse forces experienced by the rear axle.
  • This feature is particularly advantageous when the rear axle comprises a directional wheel rotatably mounted relative to the rear axle about a substantially vertical axis. Thus, the longevity of the connection between the rear axle and the chassis is improved.
  • the hydraulic cylinder extends between the two pairs of rods.
  • An advantage of these features is a reduction in the transverse bulk of the hoist.
  • the rear axle comprises an offset arm extending towards the chassis, and the hydraulic cylinder is connected to one end of the offset arm.
  • This characteristic offers the advantage, with identical cylinder stroke, of increasing the range of adjustment of the ground clearance.
  • the lifting apparatus comprises two stabilizing lateral feet movable relative to the frame between an extended position in which a distal end of the lateral stabilizing feet is intended to bear against the ground and a folded position in which this distal end is intended to be arranged at a distance from the ground
  • the lifting gear comprises a fixing interface fixed to the frame, the connecting means and the lateral stabilizing feet being connected to the frame via the interface of fixation.
  • An advantage of these features is to improve the longevity of the connection between the rear axle and the chassis while improving the stability of the lifting gear in operation.
  • the attachment interface transmits to the stabilizing lateral feet the transverse forces experienced by the connecting means.
  • the connecting means have improved longevity.
  • the lateral stabilizing feet comprise a proximal end connected to the attachment interface by a pivot connection and a lumen formed between the proximal end and the distal end, and the lifting device comprising two jacks. each having a proximal end connected to the fixation interface by a pivot connection and a distal end slidably mounted in the lumen of one of the stabilizing lateral feet.
  • the figure 1 shows a lifting gear 1 according to one embodiment of the invention.
  • the lifting gear 1 can be a mini-crane, as illustrated on the figure 1 .
  • the lifting gear 1 can be self-propelled.
  • the lifting apparatus 1 comprises an arrow 2 intended to lift a load, for example a load whose mass is less than or equal to about 2.5 tons, a chassis 4 on which the boom 2 can be mounted to rotate around a vertical axis, a front train 6 comprising in particular two front wheels 8 which can be connected to the chassis 4 by two beams 10, these two beams 10 being connectable to the chassis 4 by a slide connection of axis substantially parallel to a longitudinal axis X of the lifting gear 1, so that these beams 10 are telescopic, and a rear gear 12 partially supporting the frame 4.
  • a load for example a load whose mass is less than or equal to about 2.5 tons
  • a front train 6 comprising in particular two front wheels 8 which can be connected to the chassis 4 by two beams 10, these two beams 10 being connectable to the chassis 4 by a slide connection of axis substantially parallel to a longitudinal axis X of the lifting gear 1, so that these
  • the rear train 12 may comprise a frame 14, a wheel 16, and a flange 18 on which the wheel 16 is rotatably mounted about a substantially horizontal axis.
  • the rear train 12 may comprise a single wheel 16, as shown on the Figures 1 to 5 .
  • the wheel 16 may be directional, the flange 18 being rotatably mounted relative to the frame 14 about a substantially vertical axis. This increases the handling of the lifting gear 1.
  • the rear gear 12 may comprise a motor 20 for driving the wheel 16 in rotation relative to the flange 18.
  • the rear train 12 includes a handling lever 22 allowing an operator to maneuver the rear train 12 and therefore the machine 1 lifting.
  • the lifting gear 1 comprises connecting means connecting the rear gear 12 to the frame 4.
  • the connecting means are configured to allow a substantially vertical movement of the rear gear 12 relative to the frame 4, between a first position, visible on the figure 4 and on the figure 5 (in solid lines), in which the rear gear 12 is positioned relative to the chassis 4 so that the ground clearance of the lifting gear 1 is minimal, and a second position, visible on the figure 5 (in dashed lines), wherein the rear gear 12 is positioned relative to the frame 4 so that the ground clearance of the lifting gear 4 is maximum.
  • the plane formed by the bearing surfaces of the wheels 8, 16 on the ground may be substantially perpendicular to the axis of rotation of the boom 2 relative to the frame 4, and in the second position this axis of rotation of the boom 2 relative to the chassis 4 is inclined relative to the plane formed by the bearing surfaces of the wheels 8, 16 on the ground.
  • the axis of rotation of the wheel 16 may be located above a plane containing the axes along which extend longitudinally the two beams 10 when the rear train 12 is in the first position, and be located below of this plane when the rear train 12 is in second position.
  • substantially vertical displacement is meant a displacement of a first position at a second position with a non-zero vertical component, that is to say between two positions which are offset along a vertical axis Z of the machine 1 lifting.
  • This displacement therefore includes a displacement in circular translation as described below.
  • the connecting means advantageously comprise two rods 24 arranged relative to each other in deformable parallelogram.
  • the movement of the rear gear 12 relative to the frame 4 is here a circular translational movement.
  • Each connecting rod 24 here comprises a first end 240 pivotally mounted relative to the frame 4 about an axis substantially parallel to a transverse axis Y of the lifting gear 1, and a second end 242 connected to the rear gear 12, in particular to the frame 14, by a pivot link P1, P2 with a transverse axis Y.
  • the lifting gear 1 further comprises drive means designed to move the rear gear 12 between the first and second positions.
  • the drive means and the connecting means may be adapted to move the rear train 12 from the first position to the second position so as to compensate a slope ⁇ which is for example of the order of 6 °.
  • the drive means may advantageously comprise a hydraulic cylinder 26 and a pressure sensor 28 configured to detect a predetermined threshold pressure value in a chamber of the cylinder 26.
  • the hoist 1 may further comprise control means, such as a booster, designed to control the automatic stop of a displacement of the boom 2 when the pressure sensor 28 detects the predetermined threshold pressure value.
  • control means can also be designed to control a movement of the boom 2 which is the opposite of that which caused the pressure variation in the inner chamber of the cylinder 26, so that the arrow 2 returns to a more stable position.
  • the jack 26 can be arranged so that in the first position, its rod 30 is deployed, and that in the second position, its rod 30 is retracted.
  • the drive means comprise a single jack 26.
  • the costs are thus reduced compared to a solution in which two jacks would be used.
  • the connecting means may comprise, in addition to the pair of connecting rods 24, a second pair of rods 32.
  • These two pairs of rods 24, 32 are substantially symmetrical with respect to a median longitudinal plane of the lifting gear 1, that is to say a plane substantially perpendicular to a transverse direction Y of the hoist and separating the hoist 1 in two substantially similar parts.
  • each pair of connecting rods 24, 32 forms a deformable parallelogram connecting the rear gear 12 to the chassis 4.
  • each connecting rod 24, 32 may extend obliquely with respect to a transverse plane YZ of the hoist, so that the substantially symmetrical connecting rods of each pair form a V.
  • the hydraulic jack 26 may comprise an end 260 connected to the rear gear 12, in particular to the frame 14, by a pivot link P3 having a transverse axis Y, and an end 262 mounted to rotate with respect to the frame 4 about a transverse axis. .
  • the hydraulic cylinder 26 preferably extends between the two pairs of rods 24, 32.
  • the rear gear 12, in particular the frame 14 may comprise an offset arm 34 extending towards the chassis 4, preferably in a direction substantially parallel to the longitudinal direction X of the lifting gear 1, and the jack 26 is connected by the pivot connection P3 to a distal end 340 of the offset arm 34, that is to say the end of the offset arm 34 which is closest to the frame 4.
  • the lifting gear 1 may also comprise two stabilizing lateral feet 36, movable relative to the chassis 4 between an extended position, visible on the Figures 1 to 4 , in which a distal end 360 of the stabilizing lateral feet 36 is intended to bear against the ground and a folded position, visible on the figure 5 , in which this distal end 360 is intended to be arranged at a distance from the ground.
  • the lifting gear 1 also comprises an attachment interface 38 fixed to the frame 4.
  • the connecting means and the stabilizing lateral feet 36 are connected to the frame 4 via the interface 38 for fixing.
  • connecting rods 24, 32 are connected to the attachment interface 38 by pivot links P4, P5 having a transverse axis Y.
  • the hydraulic cylinder 26 can be connected to the chassis 4 via the interface 38 for fixing; the jack 26 is for example connected to the interface 38 for fixing by a pivot connection P6 transverse axis Y.
  • the stabilizing lateral feet 36 may comprise a proximal end 362 connected to the attachment interface 38 by a pivot connection P7, P8 with a longitudinal axis X and a slot 40 formed between the proximal end 362 and the distal end 360.
  • the lifting gear 1 further comprises two jacks 42 each having a proximal end 420 connected to the interface 38 for fixing by a pivot connection P9, P10 of longitudinal axis X and a distal end 422 slidably mounted in the slot 40 of the corresponding lateral foot 36.
  • the lumen 40 may be arranged closer to the proximal end 362 than the distal end 360 of the corresponding stabilizing lateral foot 36.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

Cet engin (1) de levage comprend une flèche (2), un châssis (4), un train (12) arrière et des moyens de liaison reliant le train (12) arrière et le châssis (4). Les moyens de liaison sont configurés pour autoriser un déplacement sensiblement vertical du train (12) arrière par rapport au châssis (4) entre une première position dans laquelle le train (12) arrière est positionné par rapport au châssis (4) de sorte que la garde au sol de l'engin (1) de levage est minimale et une deuxième position dans laquelle le train (12) arrière est positionné par rapport au châssis (4) de sorte que la garde au sol de l'engin (1) de levage est maximale, et en ce que l'engin (1) de levage comprend des moyens d'entraînement [ 26 ] conçus pour déplacer le train (12) arrière entre la première position et la deuxième position.This lifting device (1) comprises an arrow (2), a frame (4), a rear train (12) and connecting means connecting the rear train (12) and the chassis (4). The connecting means are configured to allow a substantially vertical movement of the rear gear (12) relative to the frame (4) between a first position in which the rear gear (12) is positioned with respect to the frame (4) so that the ground clearance of the machine (1) is minimal and a second position in which the rear gear (12) is positioned relative to the frame (4) so that the ground clearance of the machine (1) of the lifting gear (1) comprises drive means [26] designed to move the rear gear (12) between the first position and the second position.

Description

La présente invention concerne un engin de levage, notamment une mini-grue.The present invention relates to a hoist, including a mini-crane.

Traditionnellement, les engins de levage de type mini-grue comprennent un châssis, une flèche montée sur le châssis pour soulever une charge, un train avant et un train arrière supportant le châssis, le train arrière étant monté pivotant par rapport au châssis autour d'un axe sensiblement vertical pour permettre à un opérateur de manoeuvrer l'engin de levage.Traditionally, the mini-crane type lifting apparatus comprises a frame, a boom mounted on the chassis for lifting a load, a front axle and a rear axle supporting the chassis, the rear axle being pivotally mounted relative to the chassis around the axle. a substantially vertical axis to allow an operator to maneuver the hoist.

Cependant, le châssis est relativement bas rapport au train arrière. Cela peut poser problème pendant le déplacement des mini-grues, en particulier lorsque la surface sur laquelle la mini-grue est déplacée est irrégulière ou lorsque la mini-grue doit passer par une rampe verticale reliant deux surfaces situées à des altitudes différentes, car le bas du châssis risque de frotter ou buter contre une marche ou un obstacle léger.However, the chassis is relatively low compared to the rear axle. This can be a problem when moving mini-cranes, especially when the surface on which the mini-crane is moved is irregular or when the mini-crane has to go through a vertical ramp connecting two surfaces at different altitudes, as the Bottom of the chassis may rub or stumble against a step or slight obstacle.

Par ailleurs, les engins de levage de type mini-grue sont classiquement conçus pour une utilisation dans des lieux à forte contrainte spatiale, comme des usines ou des chantiers. Il est donc important de disposer d'engins de levage compacts et maniables.In addition, mini-crane type lifting gear is conventionally designed for use in places with high spatial constraints, such as factories or construction sites. It is therefore important to have compact and manoeuvrable hoisting equipment.

Enfin, les charges déplacées par les mini-grues peuvent avoir une masse de plusieurs tonnes. Les mini-grues doivent donc offrir le plus de garanties possibles en termes de stabilité pour éviter tout basculement accidentel pouvant entraîner des dommages corporels ou matériels.Finally, loads displaced by mini-cranes can have a mass of several tons. The mini-cranes must therefore offer the most possible guarantees in terms of stability to prevent accidental tipping that can lead to injury or damage to property.

Aussi la présente invention vise à pallier tout ou partie de ces inconvénients en proposant un engin de levage compact, maniable, stable, pouvant être déplacé sans difficulté sur une surface irrégulière.Also the present invention aims to overcome all or part of these disadvantages by providing a compact lifting device, manageable, stable, can be moved without difficulty on an uneven surface.

A cet effet, la présente invention a pour objet un engin de levage comprenant une flèche destinée à soulever une charge, un châssis auquel est reliée la flèche, et un train arrière pour supporter en partie le châssis, caractérisé en ce que l'engin de levage comprend des moyens de liaison reliant le train arrière et le châssis, les moyens de liaison étant configurés pour autoriser un déplacement sensiblement vertical du train arrière par rapport au châssis entre une première position dans laquelle le train arrière est positionné par rapport au châssis de sorte que la garde au sol de l'engin de levage est minimale et une deuxième position dans laquelle le train arrière est positionné par rapport au châssis de sorte que la garde au sol de l'engin de levage est maximale, et en ce que l'engin de levage comprend des moyens d'entraînement conçus pour déplacer le train arrière entre la première position et la deuxième position.To this end, the subject of the present invention is a lifting machine comprising an arrow intended to lift a load, a chassis to which the boom is connected, and a rear axle for partially supporting the chassis, characterized in that the machine lifting comprises connecting means connecting the rear axle and the chassis, the connecting means being configured to allow a substantially vertical movement of the rear axle relative to the chassis between a first position in which the rear axle is positioned relative to the chassis so that the ground clearance of the hoist is minimal and a second position in which the rear axle is positioned relative to the chassis so that the ground clearance of the hoist is maximum, and in that the lifting gear includes means designed to move the rear axle between the first position and the second position.

Ainsi, la garde au sol de l'engin de levage selon l'invention est réglable. Cela permet la manutention de l'engin de levage sur des surfaces irrégulières, présentant par exemple un obstacle comme une marche.Thus, the ground clearance of the hoist according to the invention is adjustable. This allows the handling of the hoist on uneven surfaces, for example presenting an obstacle such as a step.

Selon un mode de réalisation préféré, les moyens d'entraînement comprennent un vérin hydraulique et un capteur de pression configuré pour détecter une valeur de pression seuil prédéterminée dans une chambre du vérin.According to a preferred embodiment, the drive means comprise a hydraulic cylinder and a pressure sensor configured to detect a predetermined threshold pressure value in a cylinder chamber.

Un avantage de ces caractéristiques est d'éviter un basculement de l'engin de levage lorsque l'engin de levage déplace une charge.An advantage of these features is to avoid a tilting of the hoist when the hoist moves a load.

En effet, le soulèvement d'une charge à l'avant susceptible de faire basculer l'engin de levage fait pencher le châssis de l'engin de levage vers l'avant. Simultanément, du fait de la liaison autorisant un déplacement vertical du châssis par rapport au train arrière, le train arrière reste sensiblement en place quand le châssis penche. Cela engendre dans la chambre intérieure du vérin soit une dépression soit une surpression, selon l'agencement du vérin ou du capteur. Le capteur détecte cette variation de pression. Sur la base de cette détection, des moyens de commande peuvent arrêter de façon automatique le déplacement de la flèche. Les moyens de commande peuvent en outre commander un déplacement de la flèche qui est l'inverse de celui ayant engendré la variation de pression dans la chambre intérieure du vérin, si bien que la flèche retrouve une position plus stable.Indeed, the lifting of a load at the front likely to tilt the hoist tilts the chassis of the hoist forward. Simultaneously, because of the connection allowing a vertical movement of the frame relative to the rear axle, the rear axle remains substantially in place when the chassis leans. This generates in the inner chamber of the cylinder is a depression or an overpressure, according to the arrangement of the cylinder or the sensor. The sensor detects this pressure variation. On the basis of this detection, control means can automatically stop the movement of the arrow. The control means may further control a movement of the arrow which is the opposite of that which caused the variation of pressure in the inner chamber of the cylinder, so that the arrow returns to a more stable position.

Selon un mode de réalisation préféré, les moyens de liaison comprennent deux bielles, chaque bielle comprenant une première extrémité montée pivotante par rapport au châssis et une deuxième extrémité reliée au train arrière par une liaison pivot, les deux bielles étant agencées l'une par rapport à l'autre en parallélogramme déformable.According to a preferred embodiment, the connecting means comprise two connecting rods, each rod comprising a first end pivotally mounted relative to the chassis and a second end connected to the rear axle by a pivot connection, the two rods being arranged relative to each other. to the other in deformable parallelogram.

Un avantage de ces caractéristiques est que le train arrière reste droit tout au long de son déplacement et que le centre de gravité de l'engin de levage est déplacé davantage vers l'arrière de l'engin de levage, à l'opposé de la charge soulevée. Cela limite les sollicitations mécaniques du train arrière et améliore la stabilité de l'engin de levage en opération.An advantage of these features is that the rear axle remains upright throughout its movement and that the center of gravity of the hoist is moved further to the rear of the hoist, as opposed to the load raised. This limits the mechanical stresses of the rear axle and improves the stability of the lifting gear in operation.

Selon un mode de réalisation préféré, le vérin hydraulique comprend une extrémité reliée au train arrière par une liaison pivot, et une extrémité montée pivotante par rapport au châssis.According to a preferred embodiment, the hydraulic cylinder comprises an end connected to the rear axle by a pivot connection, and an end pivotally mounted relative to the chassis.

Un avantage de cette caractéristique est d'ajouter une liaison supplémentaire entre le train arrière et le châssis, en plus de celles réalisées par les bielles, afin de limiter tout débattement angulaire possible entre le train arrière et les bielles. Cela empêche un mouvement de tangage du train arrière par rapport au châssis. La durée de vie du train arrière en est sensiblement améliorée.An advantage of this feature is to add an additional connection between the rear axle and the chassis, in addition to those made by the connecting rods, to limit any angular movement possible between the rear axle and the connecting rods. This prevents pitching movement of the rear axle relative to the chassis. The life of the rear axle is significantly improved.

Avantageusement, les moyens de liaison comprennent deux paires de bielles sensiblement symétriques par rapport à un plan longitudinal médian de l'engin de levage, chaque paire de bielles formant un parallélogramme déformable reliant le train arrière au châssis.Advantageously, the connecting means comprise two pairs of rods substantially symmetrical with respect to a median longitudinal plane of the hoist, each pair of rods forming a deformable parallelogram connecting the rear axle to the chassis.

Un avantage de ces caractéristiques est une meilleure résistance à un couple relatif d'axe longitudinal entre le train arrière et le châssis, notamment lorsqu'une charge est soulevée latéralement. Cela améliore la durée de vie de la liaison entre le train arrière et le châssis.An advantage of these features is better resistance to a relative longitudinal axis torque between the rear axle and the chassis, especially when a load is raised laterally. This improves the service life of the link between the rear axle and the chassis.

De manière avantageuse, chaque bielle s'étend en biais par rapport à un plan transversal de l'engin de levage, de sorte que les bielles sensiblement symétriques de chaque paire forment un V.Advantageously, each connecting rod extends obliquely relative to a transverse plane of the hoist, so that the substantially symmetrical connecting rods of each pair form a V.

Un avantage de cette caractéristique est une reprise améliorée des efforts transversaux subis par le train arrière. Cette caractéristique est particulièrement avantageuse lorsque le train arrière comprend une roue directionnelle montée mobile en rotation par rapport au train arrière autour d'un axe sensiblement vertical. Ainsi, la longévité de la liaison entre le train arrière et le châssis est améliorée.An advantage of this feature is an improved recovery of transverse forces experienced by the rear axle. This feature is particularly advantageous when the rear axle comprises a directional wheel rotatably mounted relative to the rear axle about a substantially vertical axis. Thus, the longevity of the connection between the rear axle and the chassis is improved.

Selon un mode de réalisation avantageux, le vérin hydraulique s'étend entre les deux paires de bielles.According to an advantageous embodiment, the hydraulic cylinder extends between the two pairs of rods.

Un avantage de ces caractéristiques est une réduction de l'encombrement transversal de l'engin de levage.An advantage of these features is a reduction in the transverse bulk of the hoist.

Selon un mode de réalisation avantageux, le train arrière comprend un bras de déport s'étendant en direction du châssis, et le vérin hydraulique est relié à une extrémité du bras de déport.According to an advantageous embodiment, the rear axle comprises an offset arm extending towards the chassis, and the hydraulic cylinder is connected to one end of the offset arm.

Cette caractéristique offre l'avantage, à course de vérin identique, d'augmenter l'amplitude de réglage de la garde au sol.This characteristic offers the advantage, with identical cylinder stroke, of increasing the range of adjustment of the ground clearance.

Il en résulte une capacité améliorée de déplacement et de franchissement de l'engin de levage sur une surface irrégulière ; cela sans engendrer de surcoût puisqu'il n'y a pas besoin pour augmenter cette amplitude de réglage de surdimensionner le vérin hydraulique.This results in an improved ability to move and cross the hoist on an uneven surface; this without generating additional cost since there is no need to increase this adjustment amplitude to oversize the hydraulic cylinder.

Selon un mode de réalisation préféré, l'engin de levage comprend deux pieds latéraux stabilisateurs mobiles par rapport au châssis entre une position déployée dans laquelle une extrémité distale des pieds latéraux stabilisateurs est destinée à venir en appui contre le sol et une position rabattue dans laquelle cette extrémité distale est destinée à être agencée à distance du sol, et l'engin de levage comprend une interface de fixation fixée au châssis, les moyens de liaison et les pieds latéraux stabilisateurs étant reliés au châssis par l'intermédiaire de l'interface de fixation.According to a preferred embodiment, the lifting apparatus comprises two stabilizing lateral feet movable relative to the frame between an extended position in which a distal end of the lateral stabilizing feet is intended to bear against the ground and a folded position in which this distal end is intended to be arranged at a distance from the ground, and the lifting gear comprises a fixing interface fixed to the frame, the connecting means and the lateral stabilizing feet being connected to the frame via the interface of fixation.

Un avantage de ces caractéristiques est d'améliorer la longévité de la liaison entre le train arrière et le châssis tout en améliorant la stabilité de l'engin de levage en opération.An advantage of these features is to improve the longevity of the connection between the rear axle and the chassis while improving the stability of the lifting gear in operation.

En effet, l'interface de fixation transmet aux pieds latéraux stabilisateurs les efforts transversaux subis par les moyens de liaison. De cette façon, les moyens de liaison ont une longévité améliorée.Indeed, the attachment interface transmits to the stabilizing lateral feet the transverse forces experienced by the connecting means. In this way, the connecting means have improved longevity.

Cela est utile dans le cas où la flèche s'étend sur un côté de l'engin de levage en supportant une charge, ce qui génère un couple d'axe longitudinal s'exerçant sur les moyens de liaison.This is useful in the case where the boom extends on one side of the hoist supporting a load, which generates a longitudinal axis torque exerted on the connecting means.

Selon un mode de réalisation préféré, les pieds latéraux stabilisateurs comprennent une extrémité proximale reliée à l'interface de fixation par une liaison pivot et une lumière ménagée entre l'extrémité proximale et l'extrémité distale, et l'engin de levage comprenant deux vérins présentant chacun une extrémité proximale reliée à l'interface de fixation par une liaison pivot et une extrémité distale montée coulissante dans la lumière de l'un des pieds latéraux stabilisateurs.According to a preferred embodiment, the lateral stabilizing feet comprise a proximal end connected to the attachment interface by a pivot connection and a lumen formed between the proximal end and the distal end, and the lifting device comprising two jacks. each having a proximal end connected to the fixation interface by a pivot connection and a distal end slidably mounted in the lumen of one of the stabilizing lateral feet.

La mobilité de l'extrémité du vérin par rapport au pied latéral, par coulissement dans la lumière, permet d'améliorer la compacité transversale de l'engin de levage lorsque les pieds latéraux sont rabattus le long du châssis.The mobility of the end of the cylinder relative to the lateral foot, by sliding in the light, improves the transverse compactness of the hoist when the side legs are folded along the frame.

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

  • La figure 1 est une vue en perpsective d'un engin de levage selon un mode de réalisation de l'invention,
  • La figure 2 est une vue en perspective de la partie arrière d'un engin de levage selon un mode de réalisation de l'invention,
  • La figure 3 est une vue de derrière d'un engin de levage selon un mode de réalisation de l'invention,
  • La figure 4 est une vue de côté d'un engin de levage selon un mode de réalisation de l'invention,
  • La figure 5 est une vue de côté d'un engin de levage selon un mode de réalisation de l'invention, montrant le train arrière en première position (traits pleins) et en deuxième position (traits pointillés).
Other features and advantages will become clear from the following description of a particular embodiment of the invention, given by way of non-limiting example, with reference to the appended drawings in which:
  • The figure 1 is a perpsective view of a hoist according to one embodiment of the invention,
  • The figure 2 is a perspective view of the rear part of a hoist according to one embodiment of the invention,
  • The figure 3 is a rear view of a hoist according to one embodiment of the invention,
  • The figure 4 is a side view of a hoist according to one embodiment of the invention,
  • The figure 5 is a side view of a hoist according to one embodiment of the invention, showing the rear axle in first position (solid lines) and second position (dashed lines).

La figure 1 montre un engin 1 de levage selon un mode de réalisation de l'invention. L'engin 1 de levage peut être une mini-grue, comme illustré sur la figure 1. L'engin 1 de levage peut être automoteur.The figure 1 shows a lifting gear 1 according to one embodiment of the invention. The lifting gear 1 can be a mini-crane, as illustrated on the figure 1 . The lifting gear 1 can be self-propelled.

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. Ainsi, les orientations, directions et déplacements longitudinaux, transversaux, verticaux, avant ou arrière, haut ou bas, sont 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. Thus, the orientations, directions and longitudinal, transverse, vertical, forward or backward, upward or downward displacements are defined with respect to this reference frame.

L'engin 1 de levage comprend une flèche 2 destinée à soulever une charge, par exemple une charge dont la masse est inférieure ou égale à environ 2,5 tonnes, un châssis 4 sur lequel la flèche 2 peut être montée mobile en rotation autour d'un axe vertical, un train 6 avant comprenant notamment deux roues 8 avant pouvant être reliées au châssis 4 par deux poutres 10, ces deux poutres 10 pouvant être reliées au châssis 4 par une liaison glissière d'axe sensiblement parallèle à un axe longitudinal X de l'engin 1 de levage, de sorte que ces poutres 10 sont télescopiques, et un train 12 arrière supportant en partie le châssis 4.The lifting apparatus 1 comprises an arrow 2 intended to lift a load, for example a load whose mass is less than or equal to about 2.5 tons, a chassis 4 on which the boom 2 can be mounted to rotate around a vertical axis, a front train 6 comprising in particular two front wheels 8 which can be connected to the chassis 4 by two beams 10, these two beams 10 being connectable to the chassis 4 by a slide connection of axis substantially parallel to a longitudinal axis X of the lifting gear 1, so that these beams 10 are telescopic, and a rear gear 12 partially supporting the frame 4.

Le train 12 arrière peut comprendre un bâti 14, une roue 16, et un flasque 18 sur lequel la roue 16 est montée mobile en rotation autour d'un axe sensiblement horizontal.The rear train 12 may comprise a frame 14, a wheel 16, and a flange 18 on which the wheel 16 is rotatably mounted about a substantially horizontal axis.

Le train 12 arrière peut comprendre une unique roue 16, comme cela est représenté sur les figures 1 à 5.The rear train 12 may comprise a single wheel 16, as shown on the Figures 1 to 5 .

La roue 16 peut être directionnelle, le flasque 18 étant monté mobile en rotation par rapport au bâti 14 autour d'un axe sensiblement vertical. Cela augmente la maniabilité de l'engin 1 de levage.The wheel 16 may be directional, the flange 18 being rotatably mounted relative to the frame 14 about a substantially vertical axis. This increases the handling of the lifting gear 1.

Le train 12 arrière peut comprendre un moteur 20 pour entraîner la roue 16 en rotation par rapport au flasque 18.The rear gear 12 may comprise a motor 20 for driving the wheel 16 in rotation relative to the flange 18.

Selon l'exemple illustré sur les figures 1 à 5, le train 12 arrière comprend un levier 22 de manutention permettant à un opérateur de manoeuvrer le train 12 arrière et par conséquent l'engin 1 de levage.According to the illustrated example on Figures 1 to 5 , the rear train 12 includes a handling lever 22 allowing an operator to maneuver the rear train 12 and therefore the machine 1 lifting.

L'engin 1 de levage comprend des moyens de liaison reliant le train 12 arrière au châssis 4. Les moyens de liaison sont configurés pour autoriser un déplacement sensiblement vertical du train 12 arrière par rapport au châssis 4, entre une première position, visible sur la figure 4 et sur la figure 5 (en traits pleins), dans laquelle le train 12 arrière est positionné par rapport au châssis 4 de sorte que la garde au sol de l'engin 1 de levage est minimale, et une deuxième position, visible sur la figure 5 (en traits pointillés), dans laquelle le train 12 arrière est positionné par rapport au châssis 4 de sorte que la garde au sol de l'engin 4 de levage est maximale.The lifting gear 1 comprises connecting means connecting the rear gear 12 to the frame 4. The connecting means are configured to allow a substantially vertical movement of the rear gear 12 relative to the frame 4, between a first position, visible on the figure 4 and on the figure 5 (in solid lines), in which the rear gear 12 is positioned relative to the chassis 4 so that the ground clearance of the lifting gear 1 is minimal, and a second position, visible on the figure 5 (in dashed lines), wherein the rear gear 12 is positioned relative to the frame 4 so that the ground clearance of the lifting gear 4 is maximum.

En particulier, dans la première position, le plan formé par les surfaces d'appui des roues 8, 16 sur le sol peut être sensiblement perpendiculaire à l'axe de rotation de la flèche 2 par rapport au châssis 4, et dans la deuxième position, cet axe de rotation de la flèche 2 par rapport au châssis 4 est incliné par rapport au plan formé par les surfaces d'appui des roues 8, 16 sur le sol.In particular, in the first position, the plane formed by the bearing surfaces of the wheels 8, 16 on the ground may be substantially perpendicular to the axis of rotation of the boom 2 relative to the frame 4, and in the second position this axis of rotation of the boom 2 relative to the chassis 4 is inclined relative to the plane formed by the bearing surfaces of the wheels 8, 16 on the ground.

Comme illustré aussi sur la figure 5, l'axe de rotation de la roue 16 peut être situé au-dessus d'un plan contenant les axes le long desquels s'étendent longitudinalement les deux poutres 10 lorsque le train 12 arrière est en première position, et être situé en-dessous de ce plan lorsque le train 12 arrière est en deuxième position.As illustrated also on the figure 5 , the axis of rotation of the wheel 16 may be located above a plane containing the axes along which extend longitudinally the two beams 10 when the rear train 12 is in the first position, and be located below of this plane when the rear train 12 is in second position.

On notera que par déplacement sensiblement vertical on entend un déplacement d'une première position à une deuxième position avec une composante verticale non nulle, c'est-à-dire entre deux positions qui sont décalées selon un axe vertical Z de l'engin 1 de levage. Ce déplacement inclut donc un déplacement en translation circulaire comme cela est décrit ci-après.It will be noted that by substantially vertical displacement is meant a displacement of a first position at a second position with a non-zero vertical component, that is to say between two positions which are offset along a vertical axis Z of the machine 1 lifting. This displacement therefore includes a displacement in circular translation as described below.

En effet, selon l'exemple de réalisation des figures 1 à 5, les moyens de liaison comprennent avantageusement deux bielles 24 agencées l'une par rapport à l'autre en parallélogramme déformable. Ainsi, le mouvement du train 12 arrière par rapport au châssis 4 est ici un mouvement de translation circulaire. Chaque bielle 24 comprend ici une première extrémité 240 montée pivotante par rapport au châssis 4 autour d'une axe sensiblement parallèle à un axe transversal Y de l'engin 1 de levage, et une deuxième extrémité 242 reliée au train 12 arrière, notamment au bâti 14, par une liaison pivot P1, P2 d'axe transversal Y.Indeed, according to the exemplary embodiment of Figures 1 to 5 , the connecting means advantageously comprise two rods 24 arranged relative to each other in deformable parallelogram. Thus, the movement of the rear gear 12 relative to the frame 4 is here a circular translational movement. Each connecting rod 24 here comprises a first end 240 pivotally mounted relative to the frame 4 about an axis substantially parallel to a transverse axis Y of the lifting gear 1, and a second end 242 connected to the rear gear 12, in particular to the frame 14, by a pivot link P1, P2 with a transverse axis Y.

L'engin 1 de levage comprend en outre des moyens d'entraînement conçus pour déplacer le train 12 arrière entre la première et la deuxième position.The lifting gear 1 further comprises drive means designed to move the rear gear 12 between the first and second positions.

Comme cela est illustré sur la figure 5, les moyens d'entraînement et les moyens de liaison peuvent être adaptés pour déplacer le train 12 arrière de la première position à la deuxième position de manière à pouvoir compenser une pente α qui est par exemple de l'ordre de 6°.As illustrated on the figure 5 , the drive means and the connecting means may be adapted to move the rear train 12 from the first position to the second position so as to compensate a slope α which is for example of the order of 6 °.

Les moyens de d'entraînement peuvent avantageusement comprendre un vérin 26 hydraulique et un capteur 28 de pression configuré pour détecter une valeur de pression seuil prédéterminée dans une chambre du vérin 26.The drive means may advantageously comprise a hydraulic cylinder 26 and a pressure sensor 28 configured to detect a predetermined threshold pressure value in a chamber of the cylinder 26.

L'engin 1 de levage peut par ailleurs comprendre des moyens de commande, comme un servomoteur, conçus pour commander l'arrêt automatique d'un déplacement de la flèche 2 lorsque le capteur 28 de pression détecte la valeur de pression seuil prédéterminée. Les moyens de commande peuvent en outre être conçus commander un déplacement de la flèche 2 qui est l'inverse de celui ayant engendré la variation de pression dans la chambre intérieure du vérin 26, si bien que la flèche 2 retrouve une position plus stable.The hoist 1 may further comprise control means, such as a booster, designed to control the automatic stop of a displacement of the boom 2 when the pressure sensor 28 detects the predetermined threshold pressure value. The control means can also be designed to control a movement of the boom 2 which is the opposite of that which caused the pressure variation in the inner chamber of the cylinder 26, so that the arrow 2 returns to a more stable position.

Comme illustré sur la figure 5, le vérin 26 peut être agencé de sorte que, dans la première position, sa tige 30 soit déployée, et que, dans la deuxième position, sa tige 30 soit rétractée.As illustrated on the figure 5 , the jack 26 can be arranged so that in the first position, its rod 30 is deployed, and that in the second position, its rod 30 is retracted.

Selon une possibilité, les moyens d'entraînement comprennent un unique vérin 26. Les coûts sont ainsi réduits par rapport à une solution dans laquelle deux vérins seraient utilisés.According to one possibility, the drive means comprise a single jack 26. The costs are thus reduced compared to a solution in which two jacks would be used.

Les moyens de liaison peuvent comprendre, en plus de la paire de bielles 24, une deuxième paire de bielles 32. Ces deux paires de bielles 24, 32 sont sensiblement symétriques par rapport à un plan longitudinal médian de l'engin 1 de levage, c'est-à-dire un plan sensiblement perpendiculaire à une direction transversale Y de l'engin de levage et séparant l'engin 1 de levage en deux parties sensiblement similaires. Ainsi, chaque paire de bielles 24, 32 forme un parallélogramme déformable reliant le train 12 arrière au châssis 4.The connecting means may comprise, in addition to the pair of connecting rods 24, a second pair of rods 32. These two pairs of rods 24, 32 are substantially symmetrical with respect to a median longitudinal plane of the lifting gear 1, that is to say a plane substantially perpendicular to a transverse direction Y of the hoist and separating the hoist 1 in two substantially similar parts. Thus, each pair of connecting rods 24, 32 forms a deformable parallelogram connecting the rear gear 12 to the chassis 4.

Comme illustré sur la figure 3, chaque bielle 24, 32 peut s'étendre en biais par rapport à un plan transversal YZ de l'engin de levage, de sorte que les bielles sensiblement symétriques de chaque paire forment un V.As illustrated on the figure 3 each connecting rod 24, 32 may extend obliquely with respect to a transverse plane YZ of the hoist, so that the substantially symmetrical connecting rods of each pair form a V.

Le vérin 26 hydraulique peut comprendre une extrémité 260 reliée au train 12 arrière, notamment au bâti 14, par une liaison pivot P3 d'axe transversal Y, et une extrémité 262 montée mobile en rotation par rapport au châssis 4 autour d'un axe transversal.The hydraulic jack 26 may comprise an end 260 connected to the rear gear 12, in particular to the frame 14, by a pivot link P3 having a transverse axis Y, and an end 262 mounted to rotate with respect to the frame 4 about a transverse axis. .

Le vérin 26 hydraulique s'étend de préférence entre les deux paires de bielles 24, 32.The hydraulic cylinder 26 preferably extends between the two pairs of rods 24, 32.

Selon le mode de réalisation illustré sur les figures 1 à 5, le train 12 arrière, notamment le bâti 14, peut comprendre un bras 34 de déport s'étendant en direction du châssis 4, de préférence selon une direction sensiblement parallèle à la direction longitudinale X de l'engin 1 de levage, et le vérin 26 hydraulique est relié par la liaison pivot P3 à une extrémité 340 distale du bras 34 de déport, c'est-à-dire l'extrémité du bras 34 de déport qui est la plus proche du châssis 4.According to the embodiment illustrated on the Figures 1 to 5 the rear gear 12, in particular the frame 14, may comprise an offset arm 34 extending towards the chassis 4, preferably in a direction substantially parallel to the longitudinal direction X of the lifting gear 1, and the jack 26 is connected by the pivot connection P3 to a distal end 340 of the offset arm 34, that is to say the end of the offset arm 34 which is closest to the frame 4.

L'engin 1 de levage peut par ailleurs comprendre deux pieds 36 latéraux stabilisateurs, mobiles par rapport au châssis 4 entre une position déployée, visible sur les figures 1 à 4, dans laquelle une extrémité 360 distale des pieds 36 latéraux stabilisateurs est destinée à venir en appui contre le sol et une position rabattue, visible sur la figure 5, dans laquelle cette extrémité 360 distale est destinée à être agencée à distance du sol.The lifting gear 1 may also comprise two stabilizing lateral feet 36, movable relative to the chassis 4 between an extended position, visible on the Figures 1 to 4 , in which a distal end 360 of the stabilizing lateral feet 36 is intended to bear against the ground and a folded position, visible on the figure 5 , in which this distal end 360 is intended to be arranged at a distance from the ground.

L'engin 1 de levage comprend également une interface 38 de fixation fixée au châssis 4. Les moyens de liaison et les pieds 36 latéraux stabilisateurs sont reliés au châssis 4 par l'intermédiaire de l'interface 38 de fixation.The lifting gear 1 also comprises an attachment interface 38 fixed to the frame 4. The connecting means and the stabilizing lateral feet 36 are connected to the frame 4 via the interface 38 for fixing.

En particulier, les bielles 24, 32 sont reliées à l'interface 38 de fixation par des liaisons pivot P4, P5 d'axe transversal Y.In particular, the connecting rods 24, 32 are connected to the attachment interface 38 by pivot links P4, P5 having a transverse axis Y.

Le vérin 26 hydraulique peut être relié au châssis 4 par l'intermédiaire de l'interface 38 de fixation ; le vérin 26 est par exemple relié à l'interface 38 de fixation par une liaison pivot P6 d'axe transversal Y.The hydraulic cylinder 26 can be connected to the chassis 4 via the interface 38 for fixing; the jack 26 is for example connected to the interface 38 for fixing by a pivot connection P6 transverse axis Y.

Les pieds 36 latéraux stabilisateurs peuvent comprendre une extrémité 362 proximale reliée à l'interface 38 de fixation par une liaison pivot P7, P8 d'axe longitudinal X et une lumière 40 ménagée entre l'extrémité 362 proximale et l'extrémité 360 distale. L'engin 1 de levage comprend de plus deux vérins 42 présentant chacun une extrémité 420 proximale reliée à l'interface 38 de fixation par une liaison pivot P9, P10 d'axe longitudinal X et une extrémité 422 distale montée coulissante dans la lumière 40 du pied 36 latéral correspondant.The stabilizing lateral feet 36 may comprise a proximal end 362 connected to the attachment interface 38 by a pivot connection P7, P8 with a longitudinal axis X and a slot 40 formed between the proximal end 362 and the distal end 360. The lifting gear 1 further comprises two jacks 42 each having a proximal end 420 connected to the interface 38 for fixing by a pivot connection P9, P10 of longitudinal axis X and a distal end 422 slidably mounted in the slot 40 of the corresponding lateral foot 36.

La lumière 40 peut être agencée plus proche de l'extrémité 362 proximale que de l'extrémité 360 distale du pied 36 latéral stabilisateur correspondant.The lumen 40 may be arranged closer to the proximal end 362 than the distal end 360 of the corresponding stabilizing lateral foot 36.

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 sont 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, especially 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.

Claims (10)

Engin (1) de levage comprenant une flèche (2) destinée à soulever une charge, un châssis (4) auquel est reliée la flèche (2), et un train (12) arrière pour supporter en partie le châssis (4), caractérisé en ce que l'engin (1) de levage comprend des moyens de liaison reliant le train (12) arrière et le châssis (4), les moyens de liaison étant configurés pour autoriser un déplacement sensiblement vertical du train (12) arrière par rapport au châssis (4) entre une première position dans laquelle le train (12) arrière est positionné par rapport au châssis (4) de sorte que la garde au sol de l'engin (1) de levage est minimale et une deuxième position dans laquelle le train (12) arrière est positionné par rapport au châssis (4) de sorte que la garde au sol de l'engin (1) de levage est maximale, et en ce que l'engin (1) de levage comprend des moyens d'entraînement conçus pour déplacer le train (12) arrière entre la première position et la deuxième position.Lifting apparatus (1) comprising an arrow (2) for lifting a load, a frame (4) to which the boom (2) is connected, and a rear gear (12) for partially supporting the frame (4), characterized in that the lifting gear (1) comprises connecting means connecting the rear gear (12) and the frame (4), the connecting means being configured to allow a substantially vertical movement of the rear gear (12) relative to to the frame (4) between a first position in which the rear gear (12) is positioned relative to the frame (4) so that the ground clearance of the lifting gear (1) is minimal and a second position in which the rear gear (12) is positioned relative to the frame (4) so that the ground clearance of the lifting gear (1) is maximum, and in that the lifting gear (1) comprises designed to move the rear train (12) between the first position and the second position. Engin (1) de levage selon la revendication 1, dans lequel les moyens d'entraînement comprennent un vérin (26) hydraulique et un capteur (28) de pression configuré pour détecter une valeur de pression seuil prédéterminée dans une chambre du vérin (26).Lifting apparatus (1) according to claim 1, wherein the drive means comprises a hydraulic cylinder (26) and a pressure sensor (28) configured to detect a predetermined threshold pressure value in a cylinder chamber (26). . Engin (1) de levage selon la revendication 2, dans lequel les moyens de liaison comprennent deux bielles (24), chaque bielle (24) comprenant une première extrémité (240) montée pivotante par rapport au châssis (4) et une deuxième extrémité (242) reliée au train (12) arrière par une liaison pivot (P1, P2), les deux bielles (24) étant agencées l'une par rapport à l'autre en parallélogramme déformable.Lifting apparatus (1) according to claim 2, wherein the connecting means comprise two connecting rods (24), each connecting rod (24) comprising a first end (240) pivotally mounted relative to the frame (4) and a second end ( 242) connected to the rear train (12) by a pivot connection (P1, P2), the two links (24) being arranged relative to each other in a deformable parallelogram. Engin (1) de levage selon la revendication 3, dans lequel le vérin (26) hydraulique comprend une extrémité (260) reliée au train (12) arrière par une liaison pivot (P3), et une extrémité (262) montée pivotante par rapport au châssis (4).Lifting apparatus (1) according to claim 3, wherein the hydraulic ram (26) comprises an end (260) connected to the rear gear (12) by a pivot connection (P3), and an end (262) pivotally mounted relative to to the frame (4). Engin (1) de levage selon la revendication 3 ou 4, dans lequel les moyens de liaison comprennent deux paires de bielles (24, 32) sensiblement symétriques par rapport à un plan longitudinal médian de l'engin (1) de levage, chaque paire de bielles (24, 32) formant un parallélogramme déformable reliant le train (12) arrière au châssis (4).Lifting apparatus (1) according to claim 3 or 4, wherein the connecting means comprise two pairs of rods (24, 32) substantially symmetrical with respect to a median longitudinal plane of the machine (1) lifting, each pair of rods (24, 32) forming a deformable parallelogram connecting the train (12) rear chassis (4). Engin (1) de levage selon la revendication 5, dans lequel chaque bielle (24, 32) s'étend en biais par rapport à un plan transversal de l'engin (1) de levage, de sorte que les bielles (24, 32) sensiblement symétriques de chaque paire forment un V.Lifting apparatus (1) according to claim 5, wherein each connecting rod (24, 32) extends obliquely with respect to a transverse plane of the lifting apparatus (1), so that the connecting rods (24, 32 ) substantially symmetrical of each pair form a V. Engin (1) de levage selon la revendication 5 ou 6, dans lequel le vérin (26) hydraulique s'étend entre les deux paires de bielles (24, 32).Lifting apparatus (1) according to claim 5 or 6, wherein the hydraulic cylinder (26) extends between the two pairs of rods (24, 32). Engin (1) de levage selon l'une des revendications 2 à 7, dans lequel le train (12) arrière comprend un bras (34) de déport s'étendant en direction du châssis (4), et le vérin (26) hydraulique est relié à une extrémité (340) du bras (34) de déport.Lifting apparatus (1) according to one of claims 2 to 7, wherein the rear gear (12) comprises an offset arm (34) extending towards the frame (4) and the hydraulic cylinder (26). is connected to one end (340) of the offset arm (34). Engin (1) de levage selon l'une des revendications 1 à 8, dans lequel l'engin (1) de levage comprend deux pieds (36) latéraux stabilisateurs mobiles par rapport au châssis (4) entre une position déployée dans laquelle une extrémité (360) distale des pieds (36) latéraux stabilisateurs est destinée à venir en appui contre le sol et une position rabattue dans laquelle cette extrémité (360) distale est destinée à être agencée à distance du sol, et l'engin (1) de levage comprend une interface (38) de fixation fixée au châssis (4), les moyens de liaison et les pieds (36) latéraux stabilisateurs étant reliés au châssis (4) par l'intermédiaire de l'interface (38) de fixation.Lifting apparatus (1) according to one of claims 1 to 8, wherein the lifting gear (1) comprises two stabilizing lateral feet (36) movable relative to the frame (4) between a deployed position in which one end (360) distal of the feet (36) lateral stabilizers is intended to bear against the ground and a folded position in which the end (360) distal is intended to be arranged at a distance from the ground, and the machine (1) of lifting comprises an attachment interface (38) fixed to the frame (4), the connecting means and the lateral stabilizing feet (36) being connected to the frame (4) via the interface (38) for fixing. Engin (1) de levage selon la revendication 9, dans lequel les pieds (36) latéraux stabilisateurs comprennent une extrémité (362) proximale reliée à l'interface (38) de fixation par une liaison pivot (P7, P8) et une lumière (40) ménagée entre l'extrémité (362) proximale et l'extrémité (362) distale, et l'engin (1) de levage comprenant deux vérins (42) présentant chacun une extrémité (420) proximale reliée à l'interface (38) de fixation par une liaison pivot (P9, P10) et une extrémité (422) distale montée coulissante dans la lumière (40) de l'un des pieds (36) latéraux stabilisateurs.Lifting apparatus (1) according to claim 9, wherein the stabilizing lateral feet (36) comprise a proximal end (362) connected to the attachment interface (38) by a pivot connection (P7, P8) and a light ( 40) formed between the proximal end (362) and the distal end (362), and the lifting apparatus (1) comprising two jacks (42) each having a proximal end (420) connected to the interface (38). ) by a pivot connection (P9, P10) and a distal end (422) slidably mounted in the lumen (40) of one of the stabilizing lateral feet (36).
EP15155725.3A 2014-02-21 2015-02-19 Lifting apparatus with a height regulating device Withdrawn EP2910513A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1451408A FR3017862B1 (en) 2014-02-21 2014-02-21 LIFTING DEVICE WITH GROUND GUARD ADJUSTMENT

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EP2910513A1 true EP2910513A1 (en) 2015-08-26

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EP15155725.3A Withdrawn EP2910513A1 (en) 2014-02-21 2015-02-19 Lifting apparatus with a height regulating device

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EP (1) EP2910513A1 (en)
FR (1) FR3017862B1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
ITUA20163367A1 (en) * 2016-05-12 2017-11-12 Jacques Tranchero Cranes for lifting and transporting loads with a traction system.
FR3077064A1 (en) * 2018-01-23 2019-07-26 Mobilev Cranes ARTICULATED ARROW LIFTING MACHINE

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WO2003013999A2 (en) * 2001-08-03 2003-02-20 The Government Of The United States Of America, As Represented By The Secretary Of The Department Of Health And Human Services, Centers For Disease Control And Prevention Mobile load handling apparatus
WO2005108685A1 (en) * 2004-04-30 2005-11-17 The Board Of Regents For Oklahoma State University Remotely operated self-loading/unloading railroad gondola car-top material handler
US20060049003A1 (en) * 2004-09-03 2006-03-09 Sica Patsy L Material Handling Lift Vehicle And Suspension System For Use Therewith

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Publication number Priority date Publication date Assignee Title
US2849124A (en) * 1956-05-07 1958-08-26 William H Warner Engine auxiliary equipment handling jack assembly
WO1989000928A1 (en) * 1987-07-24 1989-02-09 Karlin, Gunvor (Legal Representative For The Estat Cross-country vehicle
EP0383254A2 (en) * 1989-02-17 1990-08-22 Wagner Fördertechnik GmbH & Co KG Lift-truck with a vertically spring-preloaded drive unit
WO2003013999A2 (en) * 2001-08-03 2003-02-20 The Government Of The United States Of America, As Represented By The Secretary Of The Department Of Health And Human Services, Centers For Disease Control And Prevention Mobile load handling apparatus
WO2005108685A1 (en) * 2004-04-30 2005-11-17 The Board Of Regents For Oklahoma State University Remotely operated self-loading/unloading railroad gondola car-top material handler
US20060049003A1 (en) * 2004-09-03 2006-03-09 Sica Patsy L Material Handling Lift Vehicle And Suspension System For Use Therewith

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUA20163367A1 (en) * 2016-05-12 2017-11-12 Jacques Tranchero Cranes for lifting and transporting loads with a traction system.
WO2017195140A1 (en) * 2016-05-12 2017-11-16 Jacques Tranchero Crane for lifting and transporting loads, equipped with a drive system
US11420852B2 (en) 2016-05-12 2022-08-23 Jacques Tranchero Crane for lifting and transporting loads, equipped with a drive system
FR3077064A1 (en) * 2018-01-23 2019-07-26 Mobilev Cranes ARTICULATED ARROW LIFTING MACHINE

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FR3017862B1 (en) 2019-03-29
FR3017862A1 (en) 2015-08-28

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