EP0490798B1 - Crane, especially for handling - Google Patents

Crane, especially for handling Download PDF

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Publication number
EP0490798B1
EP0490798B1 EP91440107A EP91440107A EP0490798B1 EP 0490798 B1 EP0490798 B1 EP 0490798B1 EP 91440107 A EP91440107 A EP 91440107A EP 91440107 A EP91440107 A EP 91440107A EP 0490798 B1 EP0490798 B1 EP 0490798B1
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EP
European Patent Office
Prior art keywords
jib
actuator
way
post
fork
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EP91440107A
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German (de)
French (fr)
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EP0490798A2 (en
EP0490798A3 (en
Inventor
Rémy Diebolt
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Individual
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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
    • B66C23/54—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear
    • B66C23/86—Slewing gear hydraulically actuated

Definitions

  • the present invention relates to the field of equipment for handling in general and transporting logs in particular, in particular cranes fitted to road tractors combined with mobile crews, trailers or cranes mounted at a fixed position and relates to a crane, especially for handling.
  • the cranes fitted to logging equipment tractors or other road vehicles or trailers or even mounted on a fixed station are generally jib cranes made of several foldable elements, of which the second element at least is foldable by actuation by means of 'A cylinder arranged under the first element and acting on the lower part of said second element.
  • the lower boom element is articulated on the end of a rotary barrel and is actuated by at least one external jack resting by its yoke on said barrel, which is mounted on the chassis of the vehicle or on a chassis fixed to the by means of a crown or of a ball or roller turret provided with a cooperating toothed crown, for driving the barrel in rotation, either with racks actuated by jacks, or with a pinion driven by a hydraulic motor .
  • the rotary drum directly collects the torque of the load transmitted by the boom in addition to the rotation torque.
  • the jib operating cylinder is disposed outside of the latter and is articulated on the upper part of the barrel at a level different from that of the articulation of the jib, so that when lifting a load. the lifting torque decreases.
  • the barrel being mounted in a vertical body, there is no special mounting device of the fixing type on a box.
  • the present invention aims to overcome these drawbacks.
  • a crane in particular for handling, essentially constituted by a jib, mounted in an articulated manner, by means of flanges, integral with the lower end of the jib, with a projection on the upper part of a rotary device in the form of a sleeve and an axis on a barrel, mounted on a vehicle or fixed chassis, the boom being provided, at its free end for mounting a hook, a grapple or other tool, a rotary actuator for the latter, the rotary device being integral with a part passing through the barrel and being actuated in rotation by means of a rotary actuator cooperating with the lower part of said part, the jib being actuated, for lifting, by at least one jack connected to the jib and to the rotary device, characterized in that the rotary device has a larger outside diameter than that of the barrel and is guided on the longitudinal surface and on the transverse surface of said barrel by guide elements, the projection of the rotary device comprising a
  • the crane in particular for handling, is essentially constituted by a boom 1 and by a drum 2 for receiving the boom mounted on a vehicle or fixed chassis, the barrel 2 being fixed on the chassis and the boom 1 being articulated on a rotary device 3 guided on or in the barrel 2.
  • This device 3 is provided with a part 4 passing through the barrel 2 and cooperating at its lower part with a rotary actuator 5 of the arrow 1.
  • the latter can be fitted, at its free end for mounting a hook, with a grapple or another tool, a rotary actuator similar to the actuator 5, not shown, for directing the products handled.
  • the arrow 1 is articulated on the rotary device 3 by means of flanges 6 and of an axis 7 and is actuated by means of at least one jack 8 mounted at articulation by its yoke in the size of the rotary device 3, substantially level with the hinge pin 7, the jack 8 penetrating the arrow 1 and being articulated on the latter so as to obtain a substantially constant lever arm.
  • Such an embodiment allows minimum space at the joint and obtaining good protection of the jack 8 against possible shocks caused by parts handled.
  • the actuation of the boom 1 can also be achieved by means of two jacks, namely a pushing jack 8 and a pulling cylinder 9 connected by its rod to a rear extension of the arrow 1 and mounted at articulation by its yoke on the rotary device 3.
  • the force of the cylinders 8 and 9 may be less and it is possible to use smaller cylinders.
  • the actuation of the rear end of the boom 1 can also be achieved by a thrust cylinder 12 connected by its piston rod to a yoke 13 of the rotary device 3 and by its yoke, by means of an axis 14, at the end of a fork 15 or of a pair of rods connected by its other end to said rear end of arrow 1, the connecting axis of the fork or the rods to the jack 12 cooperating with vertical guides 16 integral with the device 3.
  • the actuation of the boom 1 can be carried out by means of two thrust jacks, the rear jack 12 being supported by its rod piston on the yoke 13 and sliding along the device by pulling on the fork or the rods 15, so that the force of the jacks necessary for a given lifting power can be significantly reduced.
  • the rotary device 3 (FIG. 1) can be constituted in the form of a sleeve mounted on the end of the barrel 2, guided on the latter by means of plain, ball, roller or needle bearings 17 and resting on said barrel 2 by means of a stopper 18 with needles or rollers, this sleeve being provided at its upper part with the articulation yoke (s) of arrow 1 and the actuating cylinder of the latter.
  • the device 3 can also be in the form of a sleeve inserted into the barrel 2, guided by means of bearings 19 and provided at its upper part with a cooperating support plate 20 with a stop 21 mounted on the end of the barrel 2, this plate 20 carrying the articulation yoke (s) of the arrow 1 and its actuating cylinder and being able to be provided with a vertical return 22 for receiving a pulling jack, this return 22 resting on the barrel by means of a roller 23 or the like (FIG. 2) or being supported by oblique gussets resting under the plate 20.
  • the rotary actuator 5 of the boom 1 may advantageously be constituted, as shown in Figures 1 and 4 of the accompanying drawings, by a toothed ring for chain or by a grooved ring for cable 24, fixed to the lower end of the piece 4 passing through the barrel 2 and secured to the device 3 and cooperating with a chain or a cable 25, the two ends of which are secured to a wall of a box 26 for receiving the actuator 5, said chain or said cable 25 being guided, in addition, on two chain sprockets or grooved pulleys 27 rotatably mounted on the end of the rods piston of two cylinders 28 parallel or in opposition, the axes of connection of the pinions or wheels 27 to said piston rods being guided in corresponding parallel grooves (not shown) provided in the box 26.
  • a toothed ring for chain or by a grooved ring for cable 24 fixed to the lower end of the piece 4 passing through the barrel 2 and secured to the device 3 and cooperating with a chain or a cable 25, the two ends of which are
  • the choice of the diameter of the crown 24 and the power of the jacks can be made as a function of the desired torque and / or as a function of the useful angle of rotation necessary for the proper functioning of the crane.
  • Figures 5 and 6 show an alternative embodiment of the invention, in which the rotary actuator 5 is connected to the lower end of the part 4 penetrating into the casing 26 and is constituted by a crankshaft 29, the crank pins of which are arranged at regular intervals, are advantageously at least three in number and are each actuated by a jack 30, the jacks 30 being controlled by means of a programmable automation or a distributor with drawers.
  • a programmable automation or a distributor with drawers a programmable automation or a distributor with drawers.
  • the part 4 connecting the device 3 to the actuator 5 is advantageously produced in the form of a hollow tube opening at the upper end of the device 3 or in a chamber open at the upper end of said device 3 and cooperating in its part lower with a crown 24 with central recess.
  • a part 4 allows the passage of the supply pipes of the various cylinders by means of flexible hoses or a rotary oil distributor and thus avoiding a risk of deterioration of the latter during handling.
  • the barrel 2 is fixed at its lower part to the box 26 of the actuator 5, this box being provided in its lower part with a peripheral flange 31 provided with holes 32 for passage of flanges or tightening bolts on the chassis of the carrier vehicle. These holes 32 are arranged on the rim 31 according to the needs of the assembly.
  • the invention it is possible to produce a crane, in particular for handling, of simple constitution, making it possible to eliminate the fragile zones currently existing on known cranes and to better protect the various jacks, as well as their piping. 'food.
  • the invention makes it possible, with equal dimensioning of the jacks, to produce cranes of greater power or even, for a given power, to considerably reduce the cost price of such a crane.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Crane essentially constituted by a jib (1) and by a jib post (2) for receiving the jib (1) mounted on a vehicle chassis or fixed, characterised in that the jib post (2) is fixed onto the chassis, in that the jib (1) is articulated on a rotary device (3), guided on or in the jib post (2) and provided with a part (4) traversing the said jib post (2) and interacting in its lower portion with a rotary actuator (5) for the jib (1), which is provided, at its free end for mounting a hook, a grab or another tool, with a similar rotary actuator. <IMAGE>

Description

La présente invention concerne le domaine des équipements pour la manutention en général et le transport de grumes en particulier, notamment les grues équipant des tracteurs routiers combinés avec des équipages mobiles, des remorques ou des grues montées à poste fixe et a pour objet une grue, en particulier pour la manutention.The present invention relates to the field of equipment for handling in general and transporting logs in particular, in particular cranes fitted to road tractors combined with mobile crews, trailers or cranes mounted at a fixed position and relates to a crane, especially for handling.

Actuellement, les grues équipant des tracteurs d'équipement grumier ou d'autres véhicules routiers ou des remorques ou encore montées à poste fixe sont généralement des grues à flèche en plusieurs éléments repliables, dont le deuxième élément au moins est repliable par actionnement au moyen d'un vérin disposé sous le premier élément et agissant sur la partie inférieure dudit deuxième élément.Currently, the cranes fitted to logging equipment tractors or other road vehicles or trailers or even mounted on a fixed station are generally jib cranes made of several foldable elements, of which the second element at least is foldable by actuation by means of 'A cylinder arranged under the first element and acting on the lower part of said second element.

L'élément de flèche inférieur est articulé sur l'extrémité d'un fût rotatif et est actionné par au moins un vérin extérieur s'appuyant par sa chape sur ledit fût, qui est monté sur le châssis du véhicule ou sur un châssis fixe au moyen d'une couronne ou d'une tourelle à billes ou à galets munie d'une couronne dentée coopérant, pour l'entraînement en rotation du fût, soit avec des crémaillères actionnées par des vérins, soit avec un pignon entraîné par un moteur hydraulique.The lower boom element is articulated on the end of a rotary barrel and is actuated by at least one external jack resting by its yoke on said barrel, which is mounted on the chassis of the vehicle or on a chassis fixed to the by means of a crown or of a ball or roller turret provided with a cooperating toothed crown, for driving the barrel in rotation, either with racks actuated by jacks, or with a pinion driven by a hydraulic motor .

Ce mode de montage de l'élément inférieur de flèche sur le fût entraîne également un problème d'encombrement de ce dernier, ainsi qu'un risque d'abîmer le ou les vérins par choc contre les produits manutentionnés. En outre, le montage du fût sur le châssis est très complexe et très onéreux du fait qu'il nécessite un usinage de précision.This method of mounting the lower jib element on the barrel also gives rise to a problem with the latter's dimensions, as well as a risk of damaging the jack or jacks by impact against the products handled. In addition, mounting the barrel on the chassis is very complex and very expensive because it requires precision machining.

Enfin, les modèles de grues existant actuellement ne permettent pas toujours un montage répondant aux normes on vigueur, en particulier en ce qui concerne leur encombrement en hauteur dans le cas d'un montage sur un véhicule routier.Finally, the existing crane models do not always allow assembly to meet the standards are in force, in particular as regards their overall height in the case of mounting on a road vehicle.

On connaît également, par US-A-3 543 944, un dispositif de montage de flèche rotative de grue se présentant sous forme d'un corps vertical logeant un fût rotatif guidé dans ledit corps et sur l'extrémité duquel est montée une chape de réception de l'articulation inférieure de la flèche, ainsi que d'un vérin de manoeuvre de ladite flèche.Also known from US-A-3,543,944 is a device for mounting a rotary crane jib in the form of a vertical body housing a rotary drum guided in said body and on the end of which a yoke is mounted. reception of the lower articulation of the boom, as well as of a jack for operating said boom.

Dans ce mode de réalisation, le fût rotatif encaisse directement le couple de la charge transmis par la flèche en plus du couple de rotation. En outre, le vérin de manoeuvre de la flèche est disposé extérieurement à cette dernière et est articulé sur la partie supérieure du fût à un niveau différent de celui de l'articulation de la flèche, de sorte que lors de la levée d'une charge le couple de levage décroît.In this embodiment, the rotary drum directly collects the torque of the load transmitted by the boom in addition to the rotation torque. In addition, the jib operating cylinder is disposed outside of the latter and is articulated on the upper part of the barrel at a level different from that of the articulation of the jib, so that when lifting a load. the lifting torque decreases.

Par ailleurs, le fût étant monté dans un corps vertical, il n'est pas prévu de dispositif de montage particulier du type fixation sur un caisson.Furthermore, the barrel being mounted in a vertical body, there is no special mounting device of the fixing type on a box.

La présente invention a pour but de pallier ces inconvénients.The present invention aims to overcome these drawbacks.

Elle a, en effet, pour objet une grue, en particulier pour la manutention, essentiellement constituée par une flèche, montée de manière articulée, par l'intermédiaire de flasques, solidaires de l'extrémité inférieure de la flèche, d'une saillie sur la partie supérieure d'un dispositif rotatif sous forme d'un manchon et d'un axe sur un fût, monté sur un châssis de véhicule ou fixe, la flèche étant pourvue, à son extrémité libre de montage d'un crochet, d'un grappin ou d'un autre outil, d'un actionneur rotatif pour ce dernier, le dispositif rotatif étant solidaire d'une pièce traversant le fût et étant actionné en rotation par l'intermédiaire d'un actionneur rotatif coopérant avec la partie inférieure de ladite pièce, la flèche étant actionnée, pour le levage, par au moins un vérin relié à la flèche et au dispositif rotatif, caractérisée en ce que le dispositif rotatif présente un diamètre extérieur plus important que celui du fût et est guidé sur la surface longitudinale et sur la surface transversale dudit fût par des éléments de guidage, la saillie du dispositif rotatif comportant une paire de trous ménagés sensiblement au même niveau, d'une part, pour le logement de l'axe de l'articulation de la flèche et, d'autre part, pour la fixation de la partie inférieure du vérin.It has, in fact, for its object a crane, in particular for handling, essentially constituted by a jib, mounted in an articulated manner, by means of flanges, integral with the lower end of the jib, with a projection on the upper part of a rotary device in the form of a sleeve and an axis on a barrel, mounted on a vehicle or fixed chassis, the boom being provided, at its free end for mounting a hook, a grapple or other tool, a rotary actuator for the latter, the rotary device being integral with a part passing through the barrel and being actuated in rotation by means of a rotary actuator cooperating with the lower part of said part, the jib being actuated, for lifting, by at least one jack connected to the jib and to the rotary device, characterized in that the rotary device has a larger outside diameter than that of the barrel and is guided on the longitudinal surface and on the transverse surface of said barrel by guide elements, the projection of the rotary device comprising a pair of holes formed substantially at same level, on the one hand, for the housing of the axis of the articulation of the boom and, on the other hand, for the fixing of the lower part of the jack.

L'invention sera mieux comprise, grâce à la description ci-après, qui se rapporte à un mode de réalisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence aux dessins schématiques annexés, dans lesquels :

  • la figure 1 est une vue en élévation latérale et en coupe d'une grue conforme à l'invention ;
  • la figure 2 est une vue partielle en élévation latérale d'une variante de réalisation du montage du dispositif rotatif sur le fût ;
  • la figure 3 est une vue partielle en élévation latérale d'une variante de réalisation de l'actionnement de l'élément inférieur de flèche ;
  • la figure 4 est une vue en plan de l'actionneur rotatif de la flèche ;
  • les figures 5 et 6 sont des vues respectivement en élévation et en plan d'une variante de réalisation de l'actionneur suivant la figure 4, et
  • la figure 7 est une vue en plan du socle de reception et de fixation du fût sur le châssis.
The invention will be better understood from the description below, which relates to a preferred embodiment, given by way of nonlimiting example, and explained with reference to the appended schematic drawings, in which:
  • Figure 1 is a side elevational view in section of a crane according to the invention;
  • Figure 2 is a partial side elevational view of an alternative embodiment of the mounting of the rotary device on the barrel;
  • Figure 3 is a partial side elevational view of an alternative embodiment of the actuation of the lower boom member;
  • Figure 4 is a plan view of the rotary actuator of the boom;
  • FIGS. 5 and 6 are views in elevation and in plan respectively of an alternative embodiment of the actuator according to FIG. 4, and
  • Figure 7 is a plan view of the receiving base and fixing the barrel on the chassis.

Conformément à l'invention et comme le montre plus particulièrement, à titre d'exemple, la figure 1 des dessins annexes, la grue, en particulier pour manutention, est essentiellement constituée par une flèche 1 et par un fût 2 de réception de la flèche monté sur un châssis de véhicule ou fixe, le fût 2 étant fixe sur le châssis et la flèche 1 étant articulée sur un dispositif rotatif 3 guidé sur ou dans le fût 2.According to the invention and as shown more particularly, by way of example, Figure 1 of the accompanying drawings, the crane, in particular for handling, is essentially constituted by a boom 1 and by a drum 2 for receiving the boom mounted on a vehicle or fixed chassis, the barrel 2 being fixed on the chassis and the boom 1 being articulated on a rotary device 3 guided on or in the barrel 2.

Ce dispositif 3 est pourvu d'une pièce 4 traversant le fût 2 et coopérant à sa partie inférieure avec un actionneur rotatif 5 de la flèche 1. Cette dernière peut être équipée, a son extrémité libre de montage d'un crochet, d'un grappin ou d'un autre outil, d'un actionneur rotatif analogue à l'actionneur 5, non représenté, permettant de diriger les produits manutentionnés.This device 3 is provided with a part 4 passing through the barrel 2 and cooperating at its lower part with a rotary actuator 5 of the arrow 1. The latter can be fitted, at its free end for mounting a hook, with a grapple or another tool, a rotary actuator similar to the actuator 5, not shown, for directing the products handled.

La flèche 1 est articulée sur le dispositif rotatif 3 par l'intermédiaire de flasques 6 et d'un axe 7 et est actionnée au moyen d'au moins un vérin 8 monté à articulation par sa chape dans l'encombrement du dispositif rotatif 3, sensiblement de niveau avec l'axe d'articulation 7, le vérin 8 pénétrant dans la flèche 1 et étant articulé sur cette dernière de manière à obtenir un bras de levier pratiquement constant. Un tel mode de réalisation permet un encombrement minimum au niveau de l'articulation et l'obtention d'une bonne protection du vérin 8 contre des chocs éventuels provoqués par des pièces manutentionnées.The arrow 1 is articulated on the rotary device 3 by means of flanges 6 and of an axis 7 and is actuated by means of at least one jack 8 mounted at articulation by its yoke in the size of the rotary device 3, substantially level with the hinge pin 7, the jack 8 penetrating the arrow 1 and being articulated on the latter so as to obtain a substantially constant lever arm. Such an embodiment allows minimum space at the joint and obtaining good protection of the jack 8 against possible shocks caused by parts handled.

En outre, la prévision d'un bras de levier restant constant pendant toute la manoeuvre de la flèche 1 permet une meilleure utilisation du vérin 8 et donc une meilleure adaptation de sa force, de sorte que son dimensionnement peut être réduit.In addition, the provision of a lever arm remaining constant during the whole operation of the boom 1 allows better use of the jack 8 and therefore a better adaptation of its force, so that its dimensioning can be reduced.

Selon une variante de réalisation de l'invention, l'actionnement de la flèche 1 peut également être réalisé au moyen de deux vérins, à savoir un vérin poussant 8 et un vérin tirant 9 relié par sa tige à un prolongement arrière de la flèche 1 et monté à articulation par sa chape sur le dispositif rotatif 3. Ainsi, la force des vérins 8 et 9 peut être moindre et il est possible d'utiliser des vérins de plus faible dimension.According to an alternative embodiment of the invention, the actuation of the boom 1 can also be achieved by means of two jacks, namely a pushing jack 8 and a pulling cylinder 9 connected by its rod to a rear extension of the arrow 1 and mounted at articulation by its yoke on the rotary device 3. Thus, the force of the cylinders 8 and 9 may be less and it is possible to use smaller cylinders.

Il est également possible, conformement à une autre variante de réalisation de l'invention, d'articuler les tiges des vérins 8 et 9 dans un coulisseau 10 monté dans la flèche 1 et pouvant être bloqué en position de service (représentée à la figure 1) et en position de repos au moyen d'un verrou automatique 11, connu en soi. Un tel mode de réalisation permet une utilisation optimale des vérins 8 et 9 dans leur position de service représentée à la figure 1 et l'obtention d'un encombrement minimal de la grue en position de non utilisation. Dans ce dernier cas, le coulisseau 10 est d'abord déverrouillé par retrait du verrou 11, puis est déplacé dans la flèche 1, par actionnement des vérins 8 et 9.It is also possible, in accordance with another alternative embodiment of the invention, to articulate the rods of the jacks 8 and 9 in a slide 10 mounted in the arrow 1 and which can be locked in the service position (represented in FIG. 1 ) and in the rest position by means of an automatic lock 11, known per se. Such an embodiment allows optimal use of the jacks 8 and 9 in their service position shown in Figure 1 and obtaining a minimum size of the crane in the non-use position. In the latter case, the slide 10 is first unlocked by removing the lock 11, then is moved in the arrow 1, by actuation of the jacks 8 and 9.

Selon une autre caractéristique de l'invention, représentée à la figure 3, l'actionnement de l'extrémité arrière de la flèche 1 peut également être réalisé par un vérin de poussée 12 relié par sa tige de piston à une chape 13 du dispositif rotatif 3 et par sa chape, au moyen d'un axe 14, à l'extrémité d'une fourche 15 ou d'une paire de biellettes reliée par son autre extrémité a ladite extrémité arrière de la flèche 1, l'axe de liaison de la fourche ou des biellettes au vérin 12 coopérant avec des guides verticaux 16 solidaires du dispositif 3. Ainsi, l'actionnement de la flèche 1 peut être effectué au moyen de deux vérins de poussée, le vérin arrière 12 s'appuyant par sa tige de piston sur la chape 13 et coulissant le long du dispositif en tirant sur la fourche ou les biellettes 15, de sorte que la force des vérins nécessaire pour une puissance de levage donnée peut être notablement réduite.According to another characteristic of the invention, shown in Figure 3, the actuation of the rear end of the boom 1 can also be achieved by a thrust cylinder 12 connected by its piston rod to a yoke 13 of the rotary device 3 and by its yoke, by means of an axis 14, at the end of a fork 15 or of a pair of rods connected by its other end to said rear end of arrow 1, the connecting axis of the fork or the rods to the jack 12 cooperating with vertical guides 16 integral with the device 3. Thus, the actuation of the boom 1 can be carried out by means of two thrust jacks, the rear jack 12 being supported by its rod piston on the yoke 13 and sliding along the device by pulling on the fork or the rods 15, so that the force of the jacks necessary for a given lifting power can be significantly reduced.

Le dispositif rotatif 3 (figure 1) peut être constitué sous forme d'un manchon monté sur l'extrémité du fût 2, guidé sur ce dernier au moyen de paliers 17 lisses, à billes, à rouleaux ou à aiguilles et s'appuyant sur ledit fût 2 au moyen d'une butée 18 à aiguilles ou à rouleaux, ce manchon étant pourvu à sa partie supérieure de la ou des chapes d'articulation de la flèche 1 et du vérin d'actionnement de cette dernière.The rotary device 3 (FIG. 1) can be constituted in the form of a sleeve mounted on the end of the barrel 2, guided on the latter by means of plain, ball, roller or needle bearings 17 and resting on said barrel 2 by means of a stopper 18 with needles or rollers, this sleeve being provided at its upper part with the articulation yoke (s) of arrow 1 and the actuating cylinder of the latter.

Selon une variante de réalisation de l'invention, le dispositif 3 peut également se présenter sous forme d'un manchon inséré dans le fût 2, guidé au moyen de paliers 19 et pourvu à sa partie supérieure d'une plaque d'appui 20 coopérant avec une butée 21 montée sur l'extrémité du fût 2, cette plaque 20 portant la ou les chapes d'articulation de la flèche 1 et de son vérin d'actionnement et pouvant être pourvu d'un retour vertical 22 de réception d'un vérin tirant, ce retour 22 s'appuyant sur le fût par l'intermédiaire d'un rouleau 23 ou analogue (figure 2) ou étant étayé par des goussets obliques s'appuyant sous la plaque 20.According to an alternative embodiment of the invention, the device 3 can also be in the form of a sleeve inserted into the barrel 2, guided by means of bearings 19 and provided at its upper part with a cooperating support plate 20 with a stop 21 mounted on the end of the barrel 2, this plate 20 carrying the articulation yoke (s) of the arrow 1 and its actuating cylinder and being able to be provided with a vertical return 22 for receiving a pulling jack, this return 22 resting on the barrel by means of a roller 23 or the like (FIG. 2) or being supported by oblique gussets resting under the plate 20.

Ces modes de réalisation du dispositif 3 permettent de limiter les usinages nécessaires du fût 2 sur une très faible hauteur et ainsi de réduire de manière correspondante le prix de revient de l'ensemble de la grue.These embodiments of the device 3 make it possible to limit the necessary machining of the barrel 2 over a very low height and thus to correspondingly reduce the cost price of the entire crane.

L'actionneur rotatif 5 de la flèche 1 peut avantageusement être constitué, comme le montrent les figures 1 et 4 des dessins annexés, par une couronne dentée pour chaîne ou par une couronne à gorge pour câble 24, fixée à l'extrémité inférieure de la pièce 4 traversant le fût 2 et solidaire du dispositif 3 et coopérant avec une chaîne ou un câble 25, dont les deux extrémités sont solidarisées avec une paroi d'un caisson 26 de réception de l'actionneur 5, ladite chaîne ou ledit câble 25 étant guidé, en outre, sur deux pignons à chaîne ou poulies à gorge 27 montés à rotation sur l'extrémité des tiges de piston de deux vérins 28 parallèles ou en opposition, les axes de liaison des pignons ou roues 27 auxdites tiges de pistons étant guidés dans des rainures parallèles correspondantes (non représentées) prévues dans le caisson 26. Ainsi, par actionnement des vérins 28, il est possible de réaliser une rotation de la flèche de la grue dans l'une ou l'autre direction.The rotary actuator 5 of the boom 1 may advantageously be constituted, as shown in Figures 1 and 4 of the accompanying drawings, by a toothed ring for chain or by a grooved ring for cable 24, fixed to the lower end of the piece 4 passing through the barrel 2 and secured to the device 3 and cooperating with a chain or a cable 25, the two ends of which are secured to a wall of a box 26 for receiving the actuator 5, said chain or said cable 25 being guided, in addition, on two chain sprockets or grooved pulleys 27 rotatably mounted on the end of the rods piston of two cylinders 28 parallel or in opposition, the axes of connection of the pinions or wheels 27 to said piston rods being guided in corresponding parallel grooves (not shown) provided in the box 26. Thus, by actuation of the cylinders 28, it is possible to rotate the boom of the crane in either direction.

Le choix du diamètre de la couronne 24 et la puissance des vérins peuvent être effectués en fonction du couple de rotation souhaité et/ou en fonction de l'angle de rotation utile nécessaire au bon fonctionnement de la grue.The choice of the diameter of the crown 24 and the power of the jacks can be made as a function of the desired torque and / or as a function of the useful angle of rotation necessary for the proper functioning of the crane.

Les figures 5 et 6 représentent une variante de réalisation de l'invention, dans laquelle l'actionneur rotatif 5 est relié à l'extrémité inférieure de la pièce 4 pénétrant dans le caisson 26 et est constitué par un vilebrequin 29, dont les manetons sont disposés à intervalles réguliers, sont avantageusement au moins au nombre de trois et sont actionnés chacun par un vérin 30, les vérins 30 étant pilotés au moyen d'un automatisme programmable ou d'un distributeur à tiroirs. Ainsi, il est possible, par commande cyclique du mouvement des tiges de piston des vérins 30, de réaliser une rotation complète et en continu de la pièce 4. Le dispositif de commande des vérins n'est pas décrit en détails et relève d'une technique connue en soi.Figures 5 and 6 show an alternative embodiment of the invention, in which the rotary actuator 5 is connected to the lower end of the part 4 penetrating into the casing 26 and is constituted by a crankshaft 29, the crank pins of which are arranged at regular intervals, are advantageously at least three in number and are each actuated by a jack 30, the jacks 30 being controlled by means of a programmable automation or a distributor with drawers. Thus, it is possible, by cyclic control of the movement of the piston rods of the jacks 30, to carry out a complete and continuous rotation of the part 4. The device for controlling the jacks is not described in detail and relates to a technique known per se.

La pièce 4 reliant le dispositif 3 à l'actionneur 5 est avantageusement réalisée sous forme d'un tube creux débouchant à l'extrémité supérieure du dispositif 3 ou dans une chambre ouverte à l'extrémité supérieure de cedit dispositif 3 et coopérant à sa partie inférieure avec une couronne 24 à évidement central. Une telle pièce 4 permet le passage des tuyauteries d'alimentation des différents vérins au moyen de flexibles ou d'un distributeur d'huile rotatif et d'éviter ainsi un risque de détérioration de ces derniers pendant la manutention.The part 4 connecting the device 3 to the actuator 5 is advantageously produced in the form of a hollow tube opening at the upper end of the device 3 or in a chamber open at the upper end of said device 3 and cooperating in its part lower with a crown 24 with central recess. Such a part 4 allows the passage of the supply pipes of the various cylinders by means of flexible hoses or a rotary oil distributor and thus avoiding a risk of deterioration of the latter during handling.

Dans le cas d'utilisation, à l'extrémité libre de la flèche 1, d'un actionneur rotatif analogue à l'actionneur 5, ce dernier peut être dimensionné différemment dudit actionneur 5, à savoir plus faiblement, en fonction de la charge à faire pivoter ou tourner.In the case of use, at the free end of the arrow 1, of a rotary actuator similar to the actuator 5, the latter can be dimensioned differently from said actuator 5, namely more weakly, as a function of the load to rotate or rotate.

Le fût 2 est fixé à sa partie inférieure sur le caisson 26 de l'actionneur 5, ce caisson étant muni dans sa partie inférieure d'un rebord périphérique 31 pourvu de perçages 32 de passage de brides ou de boulons de serrage sur le châssis du véhicule porteur. Ces perçages 32 sont disposés sur le rebord 31 en fonction des besoins du montage.The barrel 2 is fixed at its lower part to the box 26 of the actuator 5, this box being provided in its lower part with a peripheral flange 31 provided with holes 32 for passage of flanges or tightening bolts on the chassis of the carrier vehicle. These holes 32 are arranged on the rim 31 according to the needs of the assembly.

Grâce à l'invention, il est possible de réaliser une grue, en particulier pour la manutention, de constitution simple, permettant d'éliminer les zones fragiles existant actuellement sur les grues connues et de mieux protéger les différents vérins, ainsi que leur tuyauterie d'alimentation.Thanks to the invention, it is possible to produce a crane, in particular for handling, of simple constitution, making it possible to eliminate the fragile zones currently existing on known cranes and to better protect the various jacks, as well as their piping. 'food.

En outre, l'invention permet, à dimensionnement égal des vérins, de réaliser des grues de plus grande puissance ou encore, pour une puissance donnée, de réduire considérablement le prix de revient d'une telle grue.In addition, the invention makes it possible, with equal dimensioning of the jacks, to produce cranes of greater power or even, for a given power, to considerably reduce the cost price of such a crane.

Claims (12)

  1. A crane, more particularly for handling, mainly consisting of: a jib (1) pivotally mounted by way of plates (6), the same being rigidly secured to the bottom end of the jib (1), to a projection on the top part of a rotatable device (3) in the form of a sleeve and a spindle (7) on a jib post (2) disposed on a vehicle chassis or fixed chassis, the jib having at its unmounted end a hook or grapple or other tool; of a rotary actuator therefor, the rotatable device (3) being rigidly secured to a member (4) which extends through the jib post (2) and is rotated by way of a rotatable actuator (5) co-operating with the bottom part of the member (4), the jib (1) being operated for hoisting by at least one reciprocating actuator (8) connected to the jib (1) and to the rotatable device (3), characterised in that the rotatable device (3) has an outer diameter greater than that of the jib post (2) and is guided on the longitudinal surface and transverse surface of the jib post (2) by guide elements (17, 18, 19), the projection of the rotatable device (3) being formed with a pair of apertures disposed substantially at the same level, one such aperture being adapted to receive the spindle (7) of the jib articulation while the other aperture serves for the securing of the bottom part of the reciprocating actuator (8).
  2. A crane according to claim 1, characterised in that the jib-operating reciprocating actuator (8) is pivotally mounted by way of its fork on the projection of the top part of the rotatable device (3), extends into the jib (1) and is so pivotally connected thereto as to produce a substantially constant lever arm.
  3. A crane according to claim 1 or 2, characterised in that the jib (1) is operated by means of two reciprocating actuators, viz. a push actuator (8) and a pull actuator (9), the latter being connected by way of its rod to a rear prolongation of the jib (1) and being pivotally mounted by way of its fork on the rotatable device (3).
  4. A crane according to claim 3, characterised in that the rods of the actuators (8, 9) are pivotally mounted in a slider (10) disposed in that jib (1) and lockable by an automatic bolt (11) in its operative position and inoperative position.
  5. A crane according to claim 2, characterised in that the rear end of the jib (1) is operated by a push reciprocating actuator (12) connected by way of its piston rod to a fork (13) of the rotatable device (3) and by way of its fork and of a spindle (14) to the end of a fork (15) or of a pair of rods connected by way of its other end to the said rear end of the jib (1), the pivot pin connecting the fork or rods to the actuator (12) co-operating with vertical guides (16) rigidly secured to the device (3).
  6. A crane according to any of claims 2 and 5, characterised in that the jib (1) is operated by means of two push reciprocating actuators, the rear actuator (12) bearing by way of its piston rod on the fork (13) and sliding along the device, pulling as it does so on the fork or rods (15).
  7. A crane according to claim 1, characterised in that the rotating device (3) is in the form of a sleeve disposed on the end of the jib post (2), is guided thereon by means of plain or ball or roller or needle bearings (17) and bears on the jib post (2) by way of a needle or roller type abutment (18), the sleeve having in its top part the or each articulation fork of the jib (1) and of the reciprocating actuator for operating the same.
  8. A crane according to claim 1, characterised in that the rotatable device (3) takes the form of a sleeve disposed in the jib post (2) and guided by means of bearings (19) and having in its top part a bearing plate (20) co-operating with an abutment (21) disposed at the end of the jib post (2), the plate (2) carrying the or each articulation fork of the jib (1) and of its operating actuator and having a vertical return (22) for receiving a pull actuator, the return (22) bearing on the jib post by way of a roller (23) or the like stayed by gusset plates which bear on the plate (20).
  9. A crane according to claim 1, characterised in that the rotatable actuator (5) of the jib (1) consists with advantage of a toothed ring for a chain or of a grooved ring for a cable (24), such ring being secured to the bottom end of the member (4) which extends through the jib post (2) and being rigidly secured to the device (3) and co-operating with a chain or cable (25) whose two ends are rigidly secured to a wall of a box or chest or the like for receiving the actuator (5), the chain or cable (25) also being guided on two chain pinions or grooved pulleys (27) rotatably mounted at the end of the piston rods of two reciprocating actuators (28) which are parallel to or in opposition, the pivot pins connecting the pinions (27) to the piston rods being guided in corresponding parallel grooves in the box or chest or the like (26).
  10. A crane according to claim 1, characterised in that the rotatable actuator (5) is connected to the bottom end of the member (4) extending into the box (26) and is in the from of a crankshaft (26) whose wrist pins are disposed at regular intervals, are, with advantage, provided at leat to the number of three and are each operated by a reciprocating actuator (30), the actuators ( 30) being triggered by means of a programmable automatic system or of a multivalve distributor.
  11. A crane according to any of claims 1, 9 and 10, characterised in that the member (4) connecting the device (3) to the actuator (5) is advantageously embodied as a hollow tube opening into the top end of the device(3)or into an open chamber at the top end of the device (3) and co-operating in its bottom part with a centrally recessed ring (24).
  12. A crane according to claim 1, characterised in that the jib post (2) is secured by way of its bottom part to the box (26), the same having in its bottom part a peripheral edging (31) formed with apertures (32) for the passage of flanges or clamping pins on the chassis of the carrying vehicle.
EP91440107A 1990-12-14 1991-12-12 Crane, especially for handling Expired - Lifetime EP0490798B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015888A FR2670477B1 (en) 1990-12-14 1990-12-14 CRANE, PARTICULARLY FOR HANDLING.
FR9015888 1990-12-14

Publications (3)

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EP0490798A2 EP0490798A2 (en) 1992-06-17
EP0490798A3 EP0490798A3 (en) 1993-02-17
EP0490798B1 true EP0490798B1 (en) 1996-03-06

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EP91440107A Expired - Lifetime EP0490798B1 (en) 1990-12-14 1991-12-12 Crane, especially for handling

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US (1) US5282714A (en)
EP (1) EP0490798B1 (en)
JP (1) JPH06211493A (en)
AT (1) ATE134977T1 (en)
CA (1) CA2057562A1 (en)
DE (1) DE69117695T2 (en)
FI (1) FI97882C (en)
FR (1) FR2670477B1 (en)
NO (1) NO304879B1 (en)

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US5393193A (en) * 1992-05-18 1995-02-28 Dagg; Stuart A. Vehicle for transport and placement of grave headstones
KR19980703500A (en) * 1995-03-31 1998-11-05 심프슨로스알란 Mechanism of loading and unloading containers on vehicles
US6305678B1 (en) 2000-06-02 2001-10-23 Hammersmith Mfg. & Sales, Inc. Welder positioner
US20090060685A1 (en) * 2007-08-30 2009-03-05 Howard Godfrey All-Terrain Log Forwarder
DE102010023275B4 (en) * 2010-06-10 2022-05-12 Liebherr-Werk Ehingen Gmbh Procedure for moving large cranes in the upgraded system and system for performing this procedure
US20120085984A1 (en) * 2010-10-08 2012-04-12 Daya Arvind A Gravity energy storage and generating device
GB201117251D0 (en) * 2011-10-05 2011-11-16 Autochair Ltd Hoist mechanism
CN102653377B (en) * 2012-01-05 2014-06-04 中联重科股份有限公司 Lorry-mounted crane and lorry-mounted crane transport vehicle

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Also Published As

Publication number Publication date
US5282714A (en) 1994-02-01
EP0490798A2 (en) 1992-06-17
NO914940L (en) 1992-06-15
FR2670477A1 (en) 1992-06-19
FI97882B (en) 1996-11-29
NO914940D0 (en) 1991-12-13
FI915871A (en) 1992-06-15
EP0490798A3 (en) 1993-02-17
DE69117695T2 (en) 1996-10-10
FI915871A0 (en) 1991-12-13
NO304879B1 (en) 1999-03-01
FI97882C (en) 1997-03-10
FR2670477B1 (en) 1995-07-28
JPH06211493A (en) 1994-08-02
CA2057562A1 (en) 1992-06-15
ATE134977T1 (en) 1996-03-15
DE69117695D1 (en) 1996-04-11

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