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EP1405953A1 - Construction machine having jib lifting means - Google Patents

Construction machine having jib lifting means Download PDF

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Publication number
EP1405953A1
EP1405953A1 EP03292418A EP03292418A EP1405953A1 EP 1405953 A1 EP1405953 A1 EP 1405953A1 EP 03292418 A EP03292418 A EP 03292418A EP 03292418 A EP03292418 A EP 03292418A EP 1405953 A1 EP1405953 A1 EP 1405953A1
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EP
European Patent Office
Prior art keywords
mast
connecting rod
cylinder
base
chassis
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.)
Withdrawn
Application number
EP03292418A
Other languages
German (de)
French (fr)
Other versions
EP1405953A8 (en
Inventor
Bernard Coeuret
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.)
COEURET, BERNARD
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1405953A1 publication Critical patent/EP1405953A1/en
Publication of EP1405953A8 publication Critical patent/EP1405953A8/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom

Definitions

  • the present invention relates to a construction machine comprising rolling means with a chassis (swivel assembly) carrying a mast, possibly telescopic provided with a tool, by a connecting and pivoting means for raising and lowering the mast around an axis, with cylinders.
  • the object of the present invention is to develop a very small footprint, nevertheless offering great possibilities action by mast movement between extreme positions lowering or lifting, while having an extremely large footprint reduced in rest or transport position.
  • This construction machine has the advantage of space extremely reduced thanks to the two cylinders controlling the pivoting the mast and the interposition of the connecting rod connecting the two cylinders and the whole frame and mast.
  • This allows the use of cylinders relatively long, allowing a significant pivoting of the mast between a position very raised and a position lowered to the extreme so that a tool installed at the front of the mast can intervene very close to the chassis of the machine.
  • This also allows the device to be used in situations extremely small dimensions inside a building, a tunnel, pit or between constructions, while allowing the machine and in particular to its mast to pass from an extreme position lowering to an extreme lifting position.
  • the connecting rod is pivotally mounted around from the mast axis. This makes it possible to have a connecting rod having a radius important and thus allowing to have a main cylinder and a secondary cylinder of considerable length, advantageous in the deployed position without this significant length does not interfere with the folding of the mast in a very lowered.
  • This realization uses the advantage of the height of the base the top of which carries the pivot axis of the mast.
  • This relatively high of the pivot axis allows to tilt the mast at an angle very important without it meeting the upper chassis carrying the mast or the lower chassis, in the case of two chassis connected by pivot means allowing the rotation of the upper part of the craft in particular of the mast around an axis for example vertical.
  • This embodiment of the connecting rod and the base also allows to have cylinders of maximum length for the same size, in turn authorizing maximum pivoting of the mast between its raised position and lowered position.
  • the base consists of two yokes generally triangular, identical, parallel with a base fixed to the chassis and the top carries the axis of the mast the base receiving the connecting rod between the two screeds.
  • the connecting rod is made of two pieces in L whose ends of the branches and the vertex are connected by the axes of the connecting rod and connecting cylinders.
  • the first cylinder connecting the chassis to the connecting rod is split.
  • the invention relates to a construction machine comprising rolling means such as wheels or tracks with a lower chassis, not shown, carrying an upper chassis 1, for example pivoting with respect to the rolling chassis about an axis substantially vertical.
  • the machine is also preferably equipped with a cabin not shown as well as a control panel with joysticks to control movements and in particular feeding cylinders.
  • the upper frame 1 carries a mast 2 simply illustrated by a rectangle.
  • This mast is generally telescopic to two or more elements. It can also be an arrow.
  • the end of the mast or the boom carries tools such as buckets, scraping blades or forks, depending on the application of the machine or the operations to be carried out such as excavation, leveling, lifting or transport and lifting.
  • This mast 2 is mounted tilting around an axis 3, horizontal relative to the chassis.
  • This axis is connected to a base 4 carried by the upper chassis 1.
  • the base 4 preferably consists of two flanges of substantially triangular shape, carried by the upper frame 1.
  • a connecting rod 5 is pivotally mounted on the base 4 in particular around the axis 3 of tilting of the mast 2.
  • This connecting rod 5 has substantially an L shape, one branch 51 of which is connected to axis 3 and the other branch 52 of relatively triangular shape, provided with reinforcement boxes 53, 54 detailed later, door at one of its ends a joint 55 and at the junction of the two branches, a joint 56.
  • the shape of the L of the connecting rod 5 is such that the branch 52 is turned to the right according to Figure 1, which corresponds to the front of the machine or the working side of the machine or mast 2. Conversely, the other joint 56 is located at the rear of the branch 52 with respect to the joint 55.
  • a first cylinder or primary cylinder (here split) 6 is installed between the joint 56 and a yoke 22 carried by the mast 2, at the front of axis 3. This axis 3 is moreover connected to a yoke 21 for the articulation mast 2.
  • a second cylinder or secondary cylinder (here a single cylinder) 7 connects a yoke 11 carried by the upper chassis 1 to the articulation 55 to the front of the branch 52 of the connecting rod 5.
  • the cylinders 6, 7 are arranged in a "cross", the cylinder foot 6 coming between the articulation of the foot of the secondary cylinder 7 and that 55 of his head.
  • the jacks 6 will be called in the following “the twin cylinder 6" or simply “the cylinder 6".
  • FIG. 2 shows in more detail the shape of the connecting rod 5.
  • This connecting rod has a symmetrical structure with respect to the median plane perpendicular to axis 3 simply represented by a broken line.
  • the connecting rod is composed of two flanges 5a, 5b each having a branch 51 rising connected to axis 3 and a low branch 52.
  • the two branches 52 are connected by the two lateral boxes 53 placed on the side and on the other side of the central box 54.
  • the central box carries the axis 55 of the head of the cylinder 7 and the two axes 56A, 56B for receiving the foot of the two cylinders 6 primary.
  • This structure of the boxes 53, 54 with the connecting axes gives the part of the connecting rod 5 undergoing the main forces at the time lifting and more generally working with the mast 2, excellent rigidity, without increasing its bulk.
  • the central box 54 allows in fact, the secondary cylinder 7 reaches its axis 56 while allowing the passage on either side of the jacks 6 with good transmission some efforts.
  • FIG. 2A shows the shape of a flange 5A, 5B described and shown in Figures 1 and 2.
  • Figure 3 shows the folded position of the mast 2, the cylinder (s) primary 6 and the secondary cylinder 7 being retracted (closed position). This figure shows very clearly the layout and the nesting partial of cylinders 6 and 7 thanks to the clearance possibilities offered by the connecting rod 5.
  • This folded position of the mast 6 is useful for having the smallest footprint or so that the tool carried by the end front of mast can come as close as possible to the front of the chassis or pass between the two lateral parts of the chassis if the running chassis is made up of tracks.
  • This figure also shows the front edge 41 of the flanges of the base 4, which allow this maximum withdrawal movement or maximum folding.
  • Figure 4 shows another position of use in which the primary cylinder 6 is fully deployed while the cylinder secondary 7 is folded. Mast 2 is then raised without however being in the maximum lifting position.
  • the comparison of Figure 4 with the Figure 3 shows that the secondary cylinder 7 is not deployed, the connecting rod 5 has retained its position. This comparison also shows the positions extreme tilting for mast 2 with only the primary cylinder 6 between the lowered, extreme position ( Figure 3) and the raised position (figure 4).
  • Figure 5 shows the maximum lifting position of the mast 2 by the deployment of the secondary cylinder 7, the primary cylinder 6 being already deployed.
  • This position in Figure 5 is the lifting position maximum.
  • the cylinders 6 and 7 are supplied with hydraulic fluid by a hydraulic unit, controlled according to the movements to be executed.
  • the figures show the extreme positions of the main cylinder 6 and the secondary cylinder 7. However, depending on the commands, these cylinders can occupy all intermediate positions, since the controls are continuous and cylinder movements can be ordered separately or simultaneously.
  • the hydraulic circuit of the jacks 6, 7 also includes protection means in the form of limit switches or overload to authorize control of mast movements only within safety limits.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Jib Cranes (AREA)

Abstract

The machine on wheels has a chassis (1) carrying a mast (2). The mast can be raised and lowered by means of a base (4) constituted from two parallel clevises by which the base is fixed to the chassis, the base top carrying the mast pivoting spindle (3). An L-shaped connecting rod (5) has its concavity turned towards the mast and articulated (56) to a first actuator (6). A second actuator (7) connects the base to the connecting rod. The end (51) of one connecting rod branch (52) is connected to the mast pivoting spindle and the other end is connected to the second actuator.

Description

Domaine de l'inventionField of the invention

La présente invention concerne un engin de chantier comportant des moyens de roulement avec un châssis (ensemble pivotant) portant un mât, éventuellement télescopique muni d'un outil, par un moyen de liaison et de pivotement pour relever et abaisser le mât autour d'un axe, avec des vérins.The present invention relates to a construction machine comprising rolling means with a chassis (swivel assembly) carrying a mast, possibly telescopic provided with a tool, by a connecting and pivoting means for raising and lowering the mast around an axis, with cylinders.

Il existe de multiples réalisations d'engins de chantier du type défini ci-dessus, comportant des mâts télescopiques, ou des flèches porte-outil recevant divers outils notamment une pelle ou un godet, pour des applications extrêmement diverses. Mais ces engins de chantier ont en commun la complexité de leurs moyens de commande et de fonctionnement et l'encombrement du mât ou de la flèche en position rétractée ou encore les possibilités de mouvement relativement limitées du fait de l'encombrement des différents organes composant par exemple les moyens de levage ou plus généralement de commande du mât et des outils.There are multiple realizations of construction machinery from type defined above, comprising telescopic masts, or arrows tool holder receiving various tools including a shovel or a bucket, for extremely diverse applications. But these construction machines have common the complexity of their means of control and operation and the size of the mast or boom in the retracted position or still relatively limited movement possibilities due to the size of the various organs making up for example the means for lifting or more generally for controlling the mast and the tools.

La présente invention a pour but de développer un engin de chantier d'encombrement très réduit offrant néanmoins de grandes possibilités d'action par le mouvement du mât entre des positions extrêmes d'abaissement ou de relevage, tout en ayant un encombrement extrêmement réduit en position de repos ou de transport.The object of the present invention is to develop a very small footprint, nevertheless offering great possibilities action by mast movement between extreme positions lowering or lifting, while having an extremely large footprint reduced in rest or transport position.

Objet et avantages de l'inventionPurpose and advantages of the invention

A cet effet l'invention concerne un engin de chantier du type défini ci-dessus caractérisé en ce que le moyen de liaison et de pivotement du mât comprend

  • une embase reliée au châssis et portant l'axe de pivotement du mât,
  • une bielle montée pivotante sur l'embase,
  • un premier vérin reliant la bielle au mât,
  • un second vérin reliant l'embase à la bielle.
To this end, the invention relates to a construction machine of the type defined above, characterized in that the means for connecting and pivoting the mast comprises
  • a base connected to the chassis and carrying the pivot axis of the mast,
  • a rod pivotally mounted on the base,
  • a first jack connecting the connecting rod to the mast,
  • a second cylinder connecting the base to the connecting rod.

Cet engin de chantier présente l'avantage d'un encombrement extrêmement réduit grâce aux deux vérins commandant le pivotement du mât et de l'interposition de la bielle reliant les deux vérins et l'ensemble au châssis et au mât. Cela permet d'utiliser des vérins relativement longs, permettant un pivotement important du mât entre une position très relevée et une position abaissée à l'extrême pour qu'un outil installé à l'avant du mât puisse intervenir très près du châssis de l'engin. Cela permet également d'utiliser l'engin dans des situations d'encombrement extrêmement réduites à l'intérieur d'un bâtiment, d'un tunnel, d'une fosse ou entre des constructions, tout en permettant à l'engin et en particulier à son mât de passer d'une position extrême d'abaissement à une position extrême de relevage. Ces résultats sont obtenus avec des moyens simples à réaliser, à entretenir et à utiliser, se traduisant par de très grandes facilités et souplesse d'utilisation, un entretien réduit et une grande robustesse du fait du nombre réduit de pièces sensibles tels que des vérins ou des moyens d'alimentation des vérins.This construction machine has the advantage of space extremely reduced thanks to the two cylinders controlling the pivoting the mast and the interposition of the connecting rod connecting the two cylinders and the whole frame and mast. This allows the use of cylinders relatively long, allowing a significant pivoting of the mast between a position very raised and a position lowered to the extreme so that a tool installed at the front of the mast can intervene very close to the chassis of the machine. This also allows the device to be used in situations extremely small dimensions inside a building, a tunnel, pit or between constructions, while allowing the machine and in particular to its mast to pass from an extreme position lowering to an extreme lifting position. These results are obtained with simple means to realize, maintain and use, translating by great ease and flexibility of use, a reduced maintenance and high robustness due to the reduced number of parts sensitive such as cylinders or means for supplying cylinders.

De manière avantageuse, la bielle est montée pivotante autour de l'axe du mât. Cela permet de disposer d'une bielle ayant un rayon important et permettant ainsi d'avoir un vérin principal et un vérin secondaire de longueur importante, intéressante en position déployée sans que cette longueur importante ne gêne le repliement du mât en position très abaissée.Advantageously, the connecting rod is pivotally mounted around from the mast axis. This makes it possible to have a connecting rod having a radius important and thus allowing to have a main cylinder and a secondary cylinder of considerable length, advantageous in the deployed position without this significant length does not interfere with the folding of the mast in a very lowered.

Suivant une autre caractéristique la bielle a une forme de L dont :

  • la concavité est tournée vers le mât,
  • l'extrémité d'une branche est reliée à son axe de pivotement du mât,
  • l'extrémité de l'autre branche est reliée au deuxième vérin,
  • le sommet est relié au premier vérin.
According to another characteristic, the connecting rod has an L shape, of which:
  • the concavity is turned towards the mast,
  • the end of a branch is connected to its pivot axis of the mast,
  • the end of the other branch is connected to the second cylinder,
  • the top is connected to the first cylinder.

Grâce à cette forme particulière de la bielle, les efforts sont transmis efficacement entre les deux vérins et les appuis de ces vérins sans que ces efforts ne sollicitent de manière excessive l'axe portant la bielle et qui constitue en même temps l'axe de pivotement du mât.Thanks to this particular shape of the connecting rod, the efforts are efficiently transmitted between the two cylinders and the supports of these cylinders without these efforts placing excessive stress on the axis carrying the connecting rod and which at the same time constitutes the pivot axis of the mast.

Cette réalisation utilise l'avantage de la hauteur de l'embase dont le sommet porte l'axe de pivotement du mât. Cette position relativement haute de l'axe de pivotement permet d'incliner le mât suivant un angle très important sans qu'il ne rencontre le châssis supérieur portant le mât ou le châssis inférieur, dans le cas de deux châssis reliés par des moyens de pivotement permettant la rotation de la partie supérieure de l'engin notamment du mât autour d'un axe par exemple vertical.This realization uses the advantage of the height of the base the top of which carries the pivot axis of the mast. This relatively high of the pivot axis allows to tilt the mast at an angle very important without it meeting the upper chassis carrying the mast or the lower chassis, in the case of two chassis connected by pivot means allowing the rotation of the upper part of the craft in particular of the mast around an axis for example vertical.

Cette réalisation de la bielle et de l'embase permet également d'avoir pour un même encombrement des vérins de longueur maximale, autorisant à leur tour un pivotement maximum du mât entre sa position relevée et sa position abaissée.This embodiment of the connecting rod and the base also allows to have cylinders of maximum length for the same size, in turn authorizing maximum pivoting of the mast between its raised position and lowered position.

De façon avantageuse l'embase est constituée de deux chapes de forme générale triangulaire, identiques, parallèles dont la base est fixée au châssis et le sommet porte l'axe du mât l'embase recevant la bielle entre les deux chapes. Advantageously, the base consists of two yokes generally triangular, identical, parallel with a base fixed to the chassis and the top carries the axis of the mast the base receiving the connecting rod between the two screeds.

De manière intéressante la bielle est formée de deux pièces en L dont les extrémités des branches et le sommet sont reliés par les axes de la bielle et de liaison des vérins.Interestingly the connecting rod is made of two pieces in L whose ends of the branches and the vertex are connected by the axes of the connecting rod and connecting cylinders.

Enfin suivant une autre caractéristique avantageuse pour gagner de l'encombrement au niveau de la taille des vérins, le premier vérin reliant le châssis à la bielle est dédoublé.Finally according to another advantageous characteristic for gain space at the level of the cylinders, the first cylinder connecting the chassis to the connecting rod is split.

Dessinsdrawings

La présente invention sera décrite ci-après de manière plus détaillée à l'aide d'un exemple de réalisation représenté schématiquement dans les dessins annexés dans lesquels :

  • la figure 1 est une vue de côté de la partie supérieure d'un engin de chantier sans le châssis de roulement mais avec le châssis supérieur portant le mât et le moyen de liaison et de pivotement du mât, dans une première position,
  • la figure 2 est une vue en perspective de la bielle,
  • la figure 2A est une vue d'un flasque de la bielle de la figure 2,
  • la figure 3 est une vue de côté de la partie supérieure de l'engin selon la figure 1 mais montrant le mât en position d'inclinaison extrême, le vérin principal et le vérin secondaire étant en position complètement rétractée (vérins fermés),
  • la figure 4 est une vue analogue à celle de la figure 3 pour le vérin primaire ouvert et le vérin secondaire fermé,
  • la figure 5 est une vue de côté correspondant à celle de la figure 3 pour le vérin primaire et le vérin secondaire tous deux ouverts.
The present invention will be described below in more detail with the aid of an embodiment shown schematically in the accompanying drawings in which:
  • FIG. 1 is a side view of the upper part of a construction machine without the rolling chassis but with the upper chassis carrying the mast and the means for connecting and pivoting the mast, in a first position,
  • FIG. 2 is a perspective view of the connecting rod,
  • FIG. 2A is a view of a flange of the connecting rod of FIG. 2,
  • FIG. 3 is a side view of the upper part of the machine according to FIG. 1 but showing the mast in the extreme tilt position, the main cylinder and the secondary cylinder being in the fully retracted position (cylinders closed),
  • FIG. 4 is a view similar to that of FIG. 3 for the open primary cylinder and the closed secondary cylinder,
  • Figure 5 is a side view corresponding to that of Figure 3 for the primary cylinder and the secondary cylinder both open.

Description d'un mode de réalisationDescription of an embodiment

Selon la figure 1, l'invention concerne un engin de chantier comportant des moyens de roulement tels que des roues ou des chenilles avec un châssis inférieur, non représenté, portant un châssis supérieur 1, par exemple pivotant par rapport au châssis de roulement autour d'un axe sensiblement vertical. L'engin est également équipé de préférence d'une cabine non représentée ainsi que d'un tableau de commande avec des manettes pour commander les mouvements et en particulier l'alimentation des vérins.According to Figure 1, the invention relates to a construction machine comprising rolling means such as wheels or tracks with a lower chassis, not shown, carrying an upper chassis 1, for example pivoting with respect to the rolling chassis about an axis substantially vertical. The machine is also preferably equipped with a cabin not shown as well as a control panel with joysticks to control movements and in particular feeding cylinders.

Le châssis supérieur 1 porte un mât 2 simplement figuré par un rectangle. Ce mât est en général télescopique à deux ou plusieurs éléments. Il peut également s'agir d'une flèche. L'extrémité du mât ou de la flèche porte des outils tels que des godets, des lames de raclage ou des fourches, en fonction de l'application de l'engin ou des opérations à effectuer telles que des opérations d'excavation, de nivellement, de soulèvement ou de transport et de levage.The upper frame 1 carries a mast 2 simply illustrated by a rectangle. This mast is generally telescopic to two or more elements. It can also be an arrow. The end of the mast or the boom carries tools such as buckets, scraping blades or forks, depending on the application of the machine or the operations to be carried out such as excavation, leveling, lifting or transport and lifting.

Les différents outils qui peuvent équiper le mât de façon définitive ou interchangeable ne sont pas représentés.The different tools that can equip the mast so final or interchangeable are not shown.

Ce mât 2 est monté basculant autour d'un axe 3, horizontal par rapport au châssis. Cet axe est relié à une embase 4 portée par le châssis supérieur 1. L'embase 4 est constituée de préférence par deux flasques de forme sensiblement triangulaire, portées par le châssis supérieur 1. Une bielle 5 est montée pivotante sur l'embase 4 en particulier autour de l'axe 3 de basculement du mât 2. Cette bielle 5 a sensiblement une forme de L dont une branche 51 est reliée à l'axe 3 et l'autre branche 52 de forme relativement triangulaire, munie de caissons de renforcement 53, 54 détaillés ultérieurement, porte à l'une de ses extrémités une articulation 55 et à la jonction des deux branches, une articulation 56.This mast 2 is mounted tilting around an axis 3, horizontal relative to the chassis. This axis is connected to a base 4 carried by the upper chassis 1. The base 4 preferably consists of two flanges of substantially triangular shape, carried by the upper frame 1. A connecting rod 5 is pivotally mounted on the base 4 in particular around the axis 3 of tilting of the mast 2. This connecting rod 5 has substantially an L shape, one branch 51 of which is connected to axis 3 and the other branch 52 of relatively triangular shape, provided with reinforcement boxes 53, 54 detailed later, door at one of its ends a joint 55 and at the junction of the two branches, a joint 56.

La forme du L de la bielle 5 est telle que la branche 52 est tournée vers la droite selon la figure 1, qui correspond à l'avant de l'engin ou le côté de travail de l'engin ou du mât 2. Réciproquement, l'autre articulation 56 est située à l'arrière de la branche 52 par rapport à l'articulation 55.The shape of the L of the connecting rod 5 is such that the branch 52 is turned to the right according to Figure 1, which corresponds to the front of the machine or the working side of the machine or mast 2. Conversely, the other joint 56 is located at the rear of the branch 52 with respect to the joint 55.

Un premier vérin ou vérin primaire (ici dédoublé) 6 est installé entre l'articulation 56 et une chape 22 portée par le mât 2, à l'avant de l'axe 3. Cet axe 3 est d'ailleurs relié à une chape 21 pour l'articulation du mât 2.A first cylinder or primary cylinder (here split) 6 is installed between the joint 56 and a yoke 22 carried by the mast 2, at the front of axis 3. This axis 3 is moreover connected to a yoke 21 for the articulation mast 2.

Ainsi le pied du vérin 6 est relié à l'articulation 56 de la bielle 5 et sa tête 6 est reliée à la chape 22 du mât 2. L'allongement du vérin 6, son articulation 56 restant fixe, produit le relèvement du mât 2.Thus the foot of the jack 6 is connected to the articulation 56 of the connecting rod 5 and its head 6 is connected to the yoke 22 of the mast 2. The extension of the cylinder 6, its articulation 56 remaining fixed, produces the raising of the mast 2.

Un second vérin ou vérin secondaire (ici un vérin unique) 7 relie une chape 11 portée par le châssis supérieur 1 à l'articulation 55 à l'avant de la branche 52 de la bielle 5. Ainsi comme le montre la vue de côté de la figure 1, les vérins 6, 7 sont disposés de manière « croisée », le pied du vérin 6 venant entre l'articulation du pied du vérin secondaire 7 et celle 55 de sa tête.A second cylinder or secondary cylinder (here a single cylinder) 7 connects a yoke 11 carried by the upper chassis 1 to the articulation 55 to the front of the branch 52 of the connecting rod 5. As shown in the view of side of Figure 1, the cylinders 6, 7 are arranged in a "cross", the cylinder foot 6 coming between the articulation of the foot of the secondary cylinder 7 and that 55 of his head.

Pour des raisons d'encombrement (diamètre du fût d'un vérin) et de course (longueur d'un vérin) il est particulièrement intéressant de remplacer le vérin primaire 6 par deux vérins 6, jumelés, identiques, travaillant exactement en parallèle alors que le vérin secondaire 7 exécutant une course plus courte peut être plus encombrant. For reasons of space (diameter of the cylinder barrel) and stroke (length of a cylinder) it is particularly interesting to replace the primary cylinder 6 by two identical cylinders 6, working exactly in parallel while the secondary cylinder 7 running a shorter stroke can be more cumbersome.

Pour simplifier la description les vérins 6 seront appelés dans la suite « le vérin jumelé 6 » ou simplement « le vérin 6 ».To simplify the description, the jacks 6 will be called in the following "the twin cylinder 6" or simply "the cylinder 6".

Dans la figure 1 le vérin 7 est représenté ouvert c'est-à-dire en position allongée alors que le vérin 6 est représenté en position fermée c'est-à-dire rétractée.In Figure 1 the cylinder 7 is shown open that is to say in the extended position while the cylinder 6 is shown in the closed position that is to say retracted.

La figure 2 montre de manière plus détaillée la forme de la bielle 5. Cette bielle a une structure symétrique par rapport au plan médian perpendiculaire à l'axe 3 simplement figuré par un trait interrompu. La bielle est composée de deux flasques 5a, 5b ayant chacun une branche 51 montante reliée à l'axe 3 et une branche basse 52.Figure 2 shows in more detail the shape of the connecting rod 5. This connecting rod has a symmetrical structure with respect to the median plane perpendicular to axis 3 simply represented by a broken line. The connecting rod is composed of two flanges 5a, 5b each having a branch 51 rising connected to axis 3 and a low branch 52.

Au niveau de la partie basse de la bielle 5, les deux branches 52 sont reliées par les deux caissons latéraux 53 placés de part et d'autre du caisson central 54. Le caisson central porte l'axe 55 de la tête du vérin 7 et les deux axes 56A, 56B pour recevoir le pied des deux vérins 6 primaires.At the lower part of the connecting rod 5, the two branches 52 are connected by the two lateral boxes 53 placed on the side and on the other side of the central box 54. The central box carries the axis 55 of the head of the cylinder 7 and the two axes 56A, 56B for receiving the foot of the two cylinders 6 primary.

Cette structure des caissons 53, 54 avec les axes de liaison donne à la partie de la bielle 5 subissant les efforts principaux au moment du levage et plus généralement du travail avec le mât 2, une excellente rigidité, sans en augmenter l'encombrement. Le caisson central 54 permet en effet au vérin secondaire 7 d'arriver jusqu'à son axe 56 tout en permettant le passage de part et d'autre des vérins 6 avec une bonne transmission des efforts.This structure of the boxes 53, 54 with the connecting axes gives the part of the connecting rod 5 undergoing the main forces at the time lifting and more generally working with the mast 2, excellent rigidity, without increasing its bulk. The central box 54 allows in fact, the secondary cylinder 7 reaches its axis 56 while allowing the passage on either side of the jacks 6 with good transmission some efforts.

La figure 2A montre la forme d'un flasque 5A, 5B décrit et représenté aux figures 1 et 2.FIG. 2A shows the shape of a flange 5A, 5B described and shown in Figures 1 and 2.

La position des axes 3, 55, 56 est représentée dans cette figure par des références entre parenthèses.The position of axes 3, 55, 56 is shown in this figure by references in parentheses.

La figure 3 montre la position repliée du mât 2, le ou les vérins primaires 6 et le vérin secondaire 7 étant rétracté (position fermée). Cette figure montre de manière très claire la disposition et l'imbrication partielle des vérins 6 et 7 grâce aux possibilités de dégagement offertes par la bielle 5.Figure 3 shows the folded position of the mast 2, the cylinder (s) primary 6 and the secondary cylinder 7 being retracted (closed position). This figure shows very clearly the layout and the nesting partial of cylinders 6 and 7 thanks to the clearance possibilities offered by the connecting rod 5.

Cette position repliée du mât 6 est utile pour avoir l'encombrement le plus réduit ou pour que l'outil porté par l'extrémité avant du mât puisse venir aussi près que possible de l'avant du châssis ou passer entre les deux parties latérales du châssis si le châssis de roulement est constitué par des chenilles. This folded position of the mast 6 is useful for having the smallest footprint or so that the tool carried by the end front of mast can come as close as possible to the front of the chassis or pass between the two lateral parts of the chassis if the running chassis is made up of tracks.

Cette figure montre également le bord avant 41 des flasques de l'embase 4, qui permettent ce mouvement de retrait maximum ou de repliage maximum.This figure also shows the front edge 41 of the flanges of the base 4, which allow this maximum withdrawal movement or maximum folding.

La figure 4 montre une autre position d'utilisation dans laquelle le vérin primaire 6 est complètement déployé alors que le vérin secondaire 7 est replié. Le mât 2 est alors relevé sans toutefois se trouver en position de relèvement maximum. La comparaison de la figure 4 avec la figure 3 montre que le vérin secondaire 7 n'étant pas déployé, la bielle 5 a conservé sa position. Cette comparaison montre également les positions de basculement extrême pour le mât 2 avec uniquement le vérin primaire 6 entre la position abaissée, extrême (figure 3) et la position relevée (figure 4).Figure 4 shows another position of use in which the primary cylinder 6 is fully deployed while the cylinder secondary 7 is folded. Mast 2 is then raised without however being in the maximum lifting position. The comparison of Figure 4 with the Figure 3 shows that the secondary cylinder 7 is not deployed, the connecting rod 5 has retained its position. This comparison also shows the positions extreme tilting for mast 2 with only the primary cylinder 6 between the lowered, extreme position (Figure 3) and the raised position (figure 4).

La figure 5 montre la position de relèvement maximal du mât 2 par le déploiement du vérin secondaire 7, le vérin primaire 6 étant déjà déployé.Figure 5 shows the maximum lifting position of the mast 2 by the deployment of the secondary cylinder 7, the primary cylinder 6 being already deployed.

Là encore la comparaison des positions des figures 5 et 4 montre que dans la position de la figure 5, la bielle 5 a été pivotée autour de l'axe 3 par le déploiement du vérin secondaire 7, l'ensemble formé par la bielle 5, le vérin 6 déjà déployé et le mât 2 étant un ensemble alors rigide, qui est globalement basculé par le déploiement du vérin 7.Again the comparison of the positions of Figures 5 and 4 shows that in the position of figure 5, the connecting rod 5 has been pivoted around axis 3 by the deployment of the secondary cylinder 7, the assembly formed by the connecting rod 5, the jack 6 already deployed and the mast 2 being an assembly then rigid, which is generally tilted by the deployment of the jack 7.

Cette position de la figure 5 est la position de relèvement maximal.This position in Figure 5 is the lifting position maximum.

Les vérins 6 et 7 sont alimentés en liquide hydraulique par une centrale hydraulique, commandée en fonction des mouvements à exécuter.The cylinders 6 and 7 are supplied with hydraulic fluid by a hydraulic unit, controlled according to the movements to be executed.

Les figures présentent les positions extrêmes du vérin principal 6 et du vérin secondaire 7. Toutefois en fonction des commandes, ces vérins peuvent occuper toutes les positions intermédiaires, puisque les commandes sont continues et les mouvements des vérins peuvent être commandés séparément ou simultanément.The figures show the extreme positions of the main cylinder 6 and the secondary cylinder 7. However, depending on the commands, these cylinders can occupy all intermediate positions, since the controls are continuous and cylinder movements can be ordered separately or simultaneously.

Le circuit hydraulique des vérins 6, 7 comporte également des moyens de protection sous forme de capteurs de fin de course ou de surcharge pour n'autoriser la commande des mouvements du mât que dans les limites de sécurité.The hydraulic circuit of the jacks 6, 7 also includes protection means in the form of limit switches or overload to authorize control of mast movements only within safety limits.

Claims (4)

Engin de chantier comportant des moyens de roulement avec un châssis (ensemble pivotant) portant un mât, éventuellement télescopique muni d'un outil, par un moyen de liaison et de pivotement pour relever et abaisser le mât autour d'un axe, avec des vérins,
caractérisé en ce que
le moyen de liaison et de pivotement du mât comprend une embase (4) constituée de deux chapes parallèles dont la base est fixée au châssis (1) et le sommet porte l'axe de pivotement (3) du mât (2), une bielle (5) montée pivotante sur l'embase (4) autour de l'axe (3) du mât (2), un premier vérin (6) reliant la bielle (5) au mât (2), un second vérin (7) reliant l'embase (4) à la bielle (5), la bielle (5) ayant une forme de L dont : la concavité est tournée vers le mât (2), le sommet (56) est relié au premier vérin (6) l'extrémité (51) d'une branche (52) est reliée à son axe de pivotement (3) du mât, l'extrémité de l'autre branche (52) est reliée au deuxième vérin (7) . Construction machine comprising rolling means with a chassis (swivel assembly) carrying a mast, possibly telescopic, fitted with a tool, by means of connection and pivoting to raise and lower the mast around an axis, with jacks ,
characterized in that
the mast connecting and pivoting means comprises a base (4) consisting of two parallel yokes, the base of which is fixed to the chassis (1) and the top carries the pivot axis (3) of the mast (2), a connecting rod (5) pivotally mounted on the base (4) around the axis (3) of the mast (2), a first jack (6) connecting the connecting rod (5) to the mast (2), a second jack (7) connecting the base (4) to the connecting rod (5), the connecting rod (5) having an L shape of which: the concavity is turned towards the mast (2), the top (56) is connected to the first cylinder (6) the end (51) of a branch (52) is connected to its pivot axis (3) of the mast, the end of the other branch (52) is connected to the second cylinder (7). Engin selon la revendication 1,
caractérisé en ce que
l'embase (4) de forme générale triangulaire reçoit la bielle (5) entre les deux chapes.Machine according to claim 1,
characterized in that
the base (4) of generally triangular shape receives the connecting rod (5) between the two yokes. Engin selon la revendication 2,
caractérisé en ce que
la bielle (5) est formée de deux pièces (5A, 5B) en L dont les extrémités des branches et le sommet sont reliés par les axes (3, 55, 56) de la bielle et de liaison des vérins (6, 7).Machine according to claim 2,
characterized in that
the connecting rod (5) is formed of two parts (5A, 5B) in L whose ends of the branches and the top are connected by the axes (3, 55, 56) of the connecting rod and connecting the jacks (6, 7) . Engin selon la revendication 1,
caractérisé en ce que
le premier vérin (6) est dédoublé.Machine according to claim 1,
characterized in that
the first cylinder (6) is split.
EP03292418A 2002-10-02 2003-10-01 Construction machine having jib lifting means Withdrawn EP1405953A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0212172 2002-10-02
FR0212172A FR2845406B1 (en) 2002-10-02 2002-10-02 SITE ENGINE COMPRISING A MAT LIFTING MEANS

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EP1405953A1 true EP1405953A1 (en) 2004-04-07
EP1405953A8 EP1405953A8 (en) 2004-08-18

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FR (1) FR2845406B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1033260C2 (en) * 2007-01-22 2008-07-23 Bos & Kalis Baggermaatsch Excavator for dredging, has hydraulic cylinder for excavator arm connected to superstructure via rotary bearing with adjustable position
CN102126122A (en) * 2011-03-31 2011-07-20 杭州浙大奔月科技有限公司 Turning machine for large-scale wind turbine gearbox

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Publication number Priority date Publication date Assignee Title
US3392855A (en) * 1966-04-04 1968-07-16 Warner Swasey Co Material handling machine
US3576268A (en) * 1969-03-19 1971-04-27 Hopper Inc Back hoe or grader
JPS60173224A (en) * 1984-02-15 1985-09-06 Handoothe- Kogyo Kk Excavator
JPS61237722A (en) * 1985-04-15 1986-10-23 Kubota Ltd Excavating working vehicle
DE3741872A1 (en) * 1987-12-10 1989-06-29 Orenstein & Koppel Ag Dipper dredger with a boom mounted pivotably on the platform
US5266001A (en) * 1987-11-26 1993-11-30 Kabushiki Kaisha Komatsu Seisakusho Working machine for construction vehicles and method of operating the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392855A (en) * 1966-04-04 1968-07-16 Warner Swasey Co Material handling machine
US3576268A (en) * 1969-03-19 1971-04-27 Hopper Inc Back hoe or grader
JPS60173224A (en) * 1984-02-15 1985-09-06 Handoothe- Kogyo Kk Excavator
JPS61237722A (en) * 1985-04-15 1986-10-23 Kubota Ltd Excavating working vehicle
US5266001A (en) * 1987-11-26 1993-11-30 Kabushiki Kaisha Komatsu Seisakusho Working machine for construction vehicles and method of operating the same
DE3741872A1 (en) * 1987-12-10 1989-06-29 Orenstein & Koppel Ag Dipper dredger with a boom mounted pivotably on the platform

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* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 010 (M - 446) 16 January 1986 (1986-01-16) *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 082 (M - 571) 12 March 1987 (1987-03-12) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1033260C2 (en) * 2007-01-22 2008-07-23 Bos & Kalis Baggermaatsch Excavator for dredging, has hydraulic cylinder for excavator arm connected to superstructure via rotary bearing with adjustable position
CN102126122A (en) * 2011-03-31 2011-07-20 杭州浙大奔月科技有限公司 Turning machine for large-scale wind turbine gearbox
CN102126122B (en) * 2011-03-31 2013-02-06 杭州浙大奔月科技有限公司 Turning machine for large-scale wind turbine gearbox

Also Published As

Publication number Publication date
FR2845406A1 (en) 2004-04-09
FR2845406B1 (en) 2005-04-22
EP1405953A8 (en) 2004-08-18

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