EP1211357A1 - Front-loading attachement for a carrier vehicle - Google Patents

Front-loading attachement for a carrier vehicle Download PDF

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Publication number
EP1211357A1
EP1211357A1 EP01403112A EP01403112A EP1211357A1 EP 1211357 A1 EP1211357 A1 EP 1211357A1 EP 01403112 A EP01403112 A EP 01403112A EP 01403112 A EP01403112 A EP 01403112A EP 1211357 A1 EP1211357 A1 EP 1211357A1
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EP
European Patent Office
Prior art keywords
arm
arms
main
control means
main arm
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Withdrawn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
EP01403112A
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German (de)
French (fr)
Inventor
Alain Gerbeaux
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.)
Faucheux Industries
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Faucheux Industries
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Filing date
Publication date
Application filed by Faucheux Industries filed Critical Faucheux Industries
Publication of EP1211357A1 publication Critical patent/EP1211357A1/en
Withdrawn legal-status Critical Current

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    • 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
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • 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
    • E02F3/308—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 working outwardly
    • 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
    • E02F3/34—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
    • E02F3/3405—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 bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines and comprising an additional linkage mechanism
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2271—Actuators and supports therefor and protection therefor

Definitions

  • the present invention relates to a front loader with variable geometry of the type used on handling, in particular in the agricultural field or in the public works.
  • chargers of this type are made of two arms which are articulated at one of their ends respective on a plate which is integral with the part front of the craft and whose free ends can be provided with tools of various types, which are of the various works that one wishes to carry out by means of the charger.
  • chargers often use a shovel or grab that is used to collect various solid elements such as in particular earth or rubble.
  • this tool is itself hinged mounted at the free end of the pivoting arms of the loader under the action of a hydraulic control cylinder.
  • the rotation of the articulated arms is controlled by a cylinder which is supplied with hydraulic fluid by a central placed on the handling machine.
  • the present invention proposes to simplify such a arrangement while minimizing the number of flexible hydraulic lines at the the articulation between the arm and the fixed plate.
  • the present invention thus relates to a device loader of the type arranged in the front part of a machine carrier and comprising at least one main arm, one of which end is pivotally mounted on a plate under the action of control means, and which is provided with an arm secondary one end of which is mounted hinged at the free end of the main arm and the other end receives a working tool, the secondary arm being provided pivot control means, consisting of hydraulic cylinders, relative to the main arm, characterized in that the hydraulic cylinders are supplied by a distributor which is arranged on one of the main or secondary arm.
  • having the dispenser on one of the arms eliminates the inconvenience previously mentioned since only two pipes flexible will be at the level of said articulation, know the two hydraulic lines supplying the distributor. Then from this distributor will leave a bundle of pipes made up of two hydraulic pipes by cylinder to order.
  • Such a provision is particularly interesting in that it facilitates the adaptation of the charger to the different types of carriers on which it can be used. It thus allows to make standardized connections for all types of carriers and chargers, which allows significantly simplify installations on load-bearing vehicles and in particular agricultural tractors.
  • Another advantage of such a distribution is that the flexible lines from the distributor to each cylinder will be much shorter lines and even, assuming that we have so particularly suitable the distributor, the present invention even makes it possible to use pipes flexible of identical length, which is particularly interesting in terms of maintenance for the user which will only have to store one or two elements of pipe identical to be able to troubleshoot all of his material.
  • the arrangement of the distributor on the arm mobile also has another advantage. Indeed, we knows that users have a series of carriers, for example tractors, on which it is possible to have several sets of instruments or charging devices. So far, users who wanted to be able to easily use a device loader on different tractors were forced to provide each of these with a specific distributor.
  • the present invention allows saving substantial by not forcing the buyer to dispose of than a single distributor, namely the one located on the charger.
  • the tool work is provided with means for controlling rotation by compared to the second arm.
  • the device according to the invention can also include means for angularly adjusting the positioning of the secondary arm according to the angular position of the main arm.
  • means for angularly adjusting the positioning of the secondary arm according to the angular position of the main arm Such a provision allows, during the raising movement of the first arm, act on the second arm to bring it back to inside, i.e. towards the wearer so minimize, or even completely avoid, the offset to the front of the work tool, during the passage of this one, from one extreme position to another.
  • a computer will be used in particular of the microcontroller type with linked inputs with means for sensing at least the position of the arms primary and secondary, and outlets able to act on means for controlling the position of these arms.
  • This calculator may include an entry in conjunction with means for sensing the position of the tool and an outlet able to act on position control means of this one.
  • the computer will include means for recording and storing the values provided by the sensors during a movement and means of reading these values and reproducing them by means for controlling the position of the arms.
  • a carrier 1 conforms to the prior art which, so schematic, is provided on its front face with a 3 'charger device.
  • This charger device is consisting of two parallel arms 5 'which are bent and are thus formed of a first part 5'a which, in loader low position, occupies one position substantially horizontal, and a second part 5'b integral with the first and which is inclined downwards relative to it, and at the end of which is arranged a working tool, namely a 7 'bucket in the present mode shown.
  • the 5 'arms are likely to occupy two positions extremes, namely a low position in which the free end of each arm 5 ′ occupies a position H and a high position in which the free end of this same arm occupies position A, switching from one to the other of these extreme positions being obtained by describing an arc C.
  • FIG 2 there is shown the same machine of handling 1 equipped with a following loader device 3 the invention which achieves the same maximum height A as that shown in Figure 1 with a clearance much lower frontal, even nonexistent, allowing to reduce in a particularly substantial way the overhang exerted by the load on the carrier.
  • the charger device 3 shown in Figure 3 thus comprises a connection plate 2 which is connected handling equipment, not shown in the drawing. he comprises a main arm 5a, which is mounted articulated by one of its ends around a joint 9 of the plate 2.
  • the device comprises a secondary arm 5b which is articulated by one of its ends on the end free of the main arm 5a around a joint 11.
  • the free end of the secondary arm 5b has a joint 13 which receives a working tool, here a bucket 7.
  • the means for rotating the main arm 5a and secondary 5b are constituted by jacks Hydraulic. So the angular positioning of the arm main 5a with respect to plate 2 is provided by a hydraulic cylinder 17 whose two ends are respectively secured to a joint 16 of the plate 2 and an articulation 18 of a second plate 19 fixed on the main arm 5a. Angular positioning of the secondary arm 5b, relative to the main arm 5a, is provided by a second hydraulic cylinder 21 one end of which is integral with the plate 19 and the other end is secured to a plate 23 fixed on arm 5b.
  • the device also includes means allowing to position the bucket 7 angularly so, for example, to keep it in a fixed horizontal position determined when the charger switches from low position to high position and vice versa.
  • These means are constituted by a third hydraulic cylinder 22 one end of which is integral with the secondary arm 5b and the other end attacks connecting rod means secured to the bucket 7.
  • the device comprises a hydraulic distributor 25 which controls the hydraulic fluid supply (figure 6) of the three cylinders 17, 21, 22. To do this, distributor 25 is connected to a feed pump disposed on the carrier 1 by a pipe 27 and a connector 29.
  • the distributor 25 is connected to each cylinder by a double pipe, it is thus connected to the jack 17 by the double pipe 17 ', to cylinder 21 by double pipe 21 'and to jack 22 by the double pipe 22 '.
  • the distributor on arm 5b we can have pipelines of the same length as it is for pipes 21 'and 22', which is interesting in terms of maintenance of the machine.
  • the hydraulic distributor 25 is controlled by a computer 28 which is connected to sensors which allow, at any time, to know the positions of the two arms 5a and 5b and of the working tool such as the bucket 7.
  • a computer 28 which is connected to sensors which allow, at any time, to know the positions of the two arms 5a and 5b and of the working tool such as the bucket 7.
  • sensors which allow, at any time, to know the positions of the two arms 5a and 5b and of the working tool such as the bucket 7.
  • Figure 3 the different parameters that these sensors are responsible for measure and send to the calculator.
  • a first sensor 30 which measures the angle ⁇ formed by the main arm 5a with plate 2 and more precisely the angle formed by the axis xx 'connecting the joints 9 and 11 and an arbitrary axis of the plate 2 and in particular an axis yy 'connecting joints 9 and 16.
  • a second sensor 32 measures the angle ⁇ formed by the main arm 5a and secondary 5b and more specifically the angle formed by the axis xx 'and an axis zz' connecting joint 11 to joint 13.
  • a third sensor 34 measures the angle formed by the secondary arm 5b with the working tool, and more precisely by the axis zz ' of this arm with a reference axis uu 'of the bucket 7.
  • the computer 28 may include means of recording and storing values taken by the sensors 30, 32, 34 during a movement, and means of reading these values and reproducing of these by the control means of the arms so as to be able, on request, to reproduce this or that type of previously recorded movement.

Abstract

The front loader, comprising an articulated main arm (5a) and a secondary arm (5b) with an implement (7), controlled by hydraulic power cylinders (17, 21), has the cylinders fed by a distributor (25) located on the main arm or secondary arm. In addition, the angular position of the secondary arm relative to the main arm is governed by a calculator (28), especially a microcontroller, with its inputs linked to position sensors (30, 32) on the arms and outputs to the power cylinder controls.

Description

La présente invention concerne un chargeur frontal à géométrie variable du type utilisé sur des engins de manutention, notamment dans le domaine agricole ou dans le domaine des travaux publics.The present invention relates to a front loader with variable geometry of the type used on handling, in particular in the agricultural field or in the public works.

On sait que les chargeurs de ce type sont constitués de deux bras qui sont articulés à l'une de leurs extrémités respectives sur une platine qui est solidaire de la partie frontale de l'engin et dont les extrémités libres peuvent être pourvues d'outils de divers types, qui sont fonction des différents travaux que l'on souhaite effectuer au moyen du chargeur. Par exemple, les chargeurs utilisent souvent une pelle ou une benne qui est destinée à recueillir des éléments solides divers tels que notamment de la terre ou des gravats. La plupart du temps, cet outil est lui-même monté articulé à l'extrémité libre des bras pivotants du chargeur sous l'action d'un vérin hydraulique de commande.We know that chargers of this type are made of two arms which are articulated at one of their ends respective on a plate which is integral with the part front of the craft and whose free ends can be provided with tools of various types, which are of the various works that one wishes to carry out by means of the charger. For example, chargers often use a shovel or grab that is used to collect various solid elements such as in particular earth or rubble. Most of the time, this tool is itself hinged mounted at the free end of the pivoting arms of the loader under the action of a hydraulic control cylinder.

La rotation des bras articulés est commandée par un vérin qui est alimenté en fluide hydraulique par une centrale disposée sur l'engin de manutention.The rotation of the articulated arms is controlled by a cylinder which is supplied with hydraulic fluid by a central placed on the handling machine.

Les chargeurs de ce type présentent un certain nombre d'inconvénients et notamment celui de présenter, sur leur partie frontale, un débattement important lorsque l'outil passe de sa position basse à sa position de hauteur maximale et inversement, et qui correspond à la flèche parcourue par les bras lorsque ces derniers décrivent un arc de cercle.There are a number of chargers of this type disadvantages and in particular that of presenting, on their front part, significant clearance when the tool goes from its low position to its height position maximum and vice versa, and which corresponds to the arrow crossed by the arms when the latter describe a arc.

Lorsque l'on souhaite augmenter l'amplitude de fonctionnement du chargeur, c'est-à-dire la différence de hauteur entre sa position basse et sa position haute, on est contraint d'augmenter la longueur du bras et donc du même coup la valeur de la flèche, c'est-à-dire le débattement de l'outil sur la partie frontale de l'engin. Ce débattement supplémentaire, outre la gêne qu'il cause à l'utilisateur et qui contraint parfois ce dernier à agir sur le positionnement de l'engin de manutention en le faisant reculer, présente également l'inconvénient d'augmenter la longueur du bras de levier exercé par la charge sur la partie avant de l'engin de manutention, ce qui a tendance à déstabiliser celui-ci.When you want to increase the amplitude of charger operation, i.e. the difference of height between its low position and its high position, we is forced to increase the length of the arm and therefore of the same stroke the value of the arrow, that is to say the travel of the tool on the front of the machine. This additional travel, in addition to the discomfort it causes the user and which sometimes forces the user to act on the positioning of the handling equipment by rolling back, also has the disadvantage increase the length of the lever arm exerted by the load on the front part of the handling equipment, this which tends to destabilize it.

On a proposé, notamment dans le brevet US-A-4.889.466 de pourvoir ce bras (ou bras principal) d'un bras secondaire dont l'une des extrémités est montée articulée à l'extrémité libre de celui-ci et l'autre extrémité reçoit un outil de travail, le bras secondaire étant pourvu de moyens de commande de pivotement par rapport au bras principal. Un tel type de dispositif présente un inconvénient notable, dans la mesure où il comporte divers vérins hydrauliques d'actionnement qui sont commandés par un distributeur qui est disposé sur le châssis du véhicule, si bien que de ce distributeur partent deux conduites hydrauliques pour chacun des vérins. Ainsi, dans le cas où le bras mobile comprend trois vérins hydrauliques, ainsi que représenté dans la réalisation de la figure 3 de la présente demande, se seront six conduites flexibles qui devront être reliées au distributeur et qui donc vont se trouver concentrées à l'endroit de l'articulation du bas avec la platine support fixe. Une telle situation peut également être bien plus complexe lorsque le nombre de vérins hydrauliques à commander est supérieur. It has been proposed, in particular in patent US-A-4,889,466 to provide this arm (or main arm) with an arm secondary one end of which is mounted hinged at the free end of it and the other end receives a working tool, the secondary arm being provided with means for controlling pivoting relative to the arm main. Such a type of device has a notable disadvantage, insofar as it involves various hydraulic actuating cylinders which are controlled by a distributor which is arranged on the chassis of the vehicle, so that from this distributor two lines leave hydraulic for each cylinder. So, in case the movable arm includes three hydraulic cylinders, as well as shown in the embodiment of Figure 3 of the present request, there will be six flexible pipes which must be connected to the distributor and which will therefore find concentrated at the bottom joint with the fixed support plate. Such a situation can also be much more complex when the number of hydraulic cylinders to be ordered is higher.

La présente invention se propose de simplifier un tel agencement en permettant de minimiser le nombre de conduites hydrauliques souples se présentant au niveau de l'articulation entre le bras et la platine fixe.The present invention proposes to simplify such a arrangement while minimizing the number of flexible hydraulic lines at the the articulation between the arm and the fixed plate.

La présente invention a ainsi pour objet un dispositif chargeur du type disposé en partie frontale d'un engin porteur et comprenant au moins un bras principal dont une extrémité est montée à pivotement sur une platine sous l'action de moyens de commande, et qui est pourvu d'un bras secondaire dont l'une des extrémités est montée articulée à l'extrémité libre du bras principal et l'autre extrémité reçoit un outil de travail, le bras secondaire étant pourvu de moyens de commande de pivotement, constitués par des vérins hydrauliques, par rapport au bras principal, caractérisé en ce que les vérins hydrauliques sont alimentés par un distributeur qui est disposé sur l'un des bras principal ou secondaire.The present invention thus relates to a device loader of the type arranged in the front part of a machine carrier and comprising at least one main arm, one of which end is pivotally mounted on a plate under the action of control means, and which is provided with an arm secondary one end of which is mounted hinged at the free end of the main arm and the other end receives a working tool, the secondary arm being provided pivot control means, consisting of hydraulic cylinders, relative to the main arm, characterized in that the hydraulic cylinders are supplied by a distributor which is arranged on one of the main or secondary arm.

Suivant l'invention, le fait de disposer le distributeur sur l'un des bras élimine l'inconvénient précédemment mentionné puisque seules deux conduites souples se trouveront au niveau de ladite articulation, à savoir les deux conduites hydrauliques alimentant le distributeur. Ensuite, de ce distributeur partiront un faisceau de conduites formé de deux conduites hydrauliques par vérin à commander.According to the invention, having the dispenser on one of the arms eliminates the inconvenience previously mentioned since only two pipes flexible will be at the level of said articulation, know the two hydraulic lines supplying the distributor. Then from this distributor will leave a bundle of pipes made up of two hydraulic pipes by cylinder to order.

Par ailleurs une telle disposition est particulièrement intéressante en ce qu'elle facilite l'adaptation du chargeur sur les différents types de porteurs sur lesquels il peut être utilisé. Il permet ainsi de réaliser des raccordements standardisés pour tous les types de porteurs et de chargeurs, ce qui permet de simplifier de façon notable les installations sur les engins porteurs et notamment les tracteurs agricoles.Furthermore, such a provision is particularly interesting in that it facilitates the adaptation of the charger to the different types of carriers on which it can be used. It thus allows to make standardized connections for all types of carriers and chargers, which allows significantly simplify installations on load-bearing vehicles and in particular agricultural tractors.

Un autre avantage d'une telle distribution est que les conduites souples partant du distributeur en direction de chaque vérin seront des conduites beaucoup plus courtes et même, dans l'hypothèse où l'on dispose de façon particulièrement judicieuse le distributeur, la présente invention rend même possible l'utilisation de conduites souples de longueur identique, ce qui est particulièrement intéressant au niveau de la maintenance pour l'utilisateur qui n'aura à stocker qu'un ou deux éléments de conduite identiques pour être en mesure de dépanner l'ensemble de son matériel.Another advantage of such a distribution is that the flexible lines from the distributor to each cylinder will be much shorter lines and even, assuming that we have so particularly suitable the distributor, the present invention even makes it possible to use pipes flexible of identical length, which is particularly interesting in terms of maintenance for the user which will only have to store one or two elements of pipe identical to be able to troubleshoot all of his material.

Enfin la disposition du distributeur sur le bras mobile présente également un autre avantage. En effet, on sait que des utilisateurs disposent d'une série de porteurs, par exemple des tracteurs, sur lesquels il est possible de disposer plusieurs séries d'instruments ou dispositifs chargeurs. Jusqu'à présent, les utilisateurs qui souhaitaient pouvoir utiliser facilement un dispositif chargeur sur différents tracteurs étaient contraints de pourvoir chacun de ceux-ci d'un distributeur spécifique. La présente invention permet de réaliser une économie substantielle en ne contraignant l'acheteur à ne disposer que d'un seul distributeur, à savoir celui disposé sur le chargeur.Finally the arrangement of the distributor on the arm mobile also has another advantage. Indeed, we knows that users have a series of carriers, for example tractors, on which it is possible to have several sets of instruments or charging devices. So far, users who wanted to be able to easily use a device loader on different tractors were forced to provide each of these with a specific distributor. The present invention allows saving substantial by not forcing the buyer to dispose of than a single distributor, namely the one located on the charger.

Dans un mode de mise en oeuvre de l'invention, l'outil de travail est pourvu de moyens de commande en rotation par rapport au second bras. In one embodiment of the invention, the tool work is provided with means for controlling rotation by compared to the second arm.

Le dispositif suivant l'invention peut également comporter des moyens permettant de régler angulairement le positionnement du bras secondaire en fonction de la position angulaire du bras principal. Une telle disposition permet, au cours du mouvement de relèvement du premier bras, d'agir sur le second bras afin de le ramener vers l'intérieur, c'est-à-dire vers le porteur de façon à minimiser, voir même éviter totalement, le déport vers l'avant de l'outil de travail, au cours du passage de celui-ci, d'une position extrême à l'autre.The device according to the invention can also include means for angularly adjusting the positioning of the secondary arm according to the angular position of the main arm. Such a provision allows, during the raising movement of the first arm, act on the second arm to bring it back to inside, i.e. towards the wearer so minimize, or even completely avoid, the offset to the front of the work tool, during the passage of this one, from one extreme position to another.

On fera appel pour ce faire à un calculateur notamment du type microcontrôleur comportant des entrées en liaison avec des moyens capteurs d'au moins la position des bras principal et secondaire, et des sorties aptes à agir sur des moyens de commande de position de ces bras. Ce calculateur pourra comprendre une entrée en liaison avec des moyens capteurs de la position de l'outil et une sortie apte à agir sur des moyens de commande de position de celui-ci.To do this, a computer will be used in particular of the microcontroller type with linked inputs with means for sensing at least the position of the arms primary and secondary, and outlets able to act on means for controlling the position of these arms. This calculator may include an entry in conjunction with means for sensing the position of the tool and an outlet able to act on position control means of this one.

Dans un mode de mise en oeuvre intéressant de l'invention le calculateur comprendra des moyens d'enregistrement et de stockage des valeurs fournies par les capteurs au cours d'un mouvement et des moyens de lecture de ces valeurs et de reproduction de celles-ci par des moyens de commande de position des bras.In an interesting mode of implementation of the invention the computer will include means for recording and storing the values provided by the sensors during a movement and means of reading these values and reproducing them by means for controlling the position of the arms.

On décrira ci-après, à titre d'exemple non limitatif, une forme d'exécution de la présente invention, en référence aux dessins annexés sur lesquels :

  • La figure 1 est une vue schématique en élévation d'un dispositif chargeur de l'état antérieur de la technique respectivement montré en positions basse et haute de ses bras de commande.
  • La figure 2 est une vue schématique d'un dispositif chargeur suivant l'invention respectivement montré en positions basse et haute de ses bras de commande.
  • La figure 3 est une vue en élévation détaillée d'un mode de mise en oeuvre d'un dispositif chargeur suivant l'invention, représenté en position basse.
  • La figure 4 est une vue en élévation d'un engin porteur équipé d'un chargeur suivant l'invention, qui montre la trajectoire parcourue par l'outil de ce chargeur ainsi que la trajectoire parcourue par un outil d'un chargeur suivant l'état antérieur de la technique.
  • Les figures 5 et 6 sont des vues partielles en élévation des deux bras principal et secondaire d'un engin porteur respectivement suivant l'état antérieur de la technique, et suivant l'invention.
    • An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the appended drawings in which:
  • Figure 1 is a schematic elevational view of a charger device of the prior art respectively shown in the low and high positions of its control arms.
  • Figure 2 is a schematic view of a loader device according to the invention respectively shown in the low and high positions of its control arms.
  • Figure 3 is a detailed elevational view of an embodiment of a charger device according to the invention, shown in the lower position.
  • FIG. 4 is an elevation view of a carrier vehicle equipped with a loader according to the invention, which shows the trajectory traveled by the tool of this loader as well as the trajectory traveled by a tool of a loader according to the prior art.
  • Figures 5 and 6 are partial elevational views of the two main and secondary arms of a carrier respectively according to the prior art, and according to the invention.

    • On a représenté sur la figure 1 un engin porteur 1 conforme à l'état antérieur de la technique qui, de façon schématique, est pourvu sur sa face frontale d'un dispositif chargeur 3'. Ce dispositif chargeur est constitué de deux bras parallèles 5' qui sont coudés et sont ainsi formés d'une première partie 5'a qui, en position basse du chargeur, occupe une position sensiblement horizontale, et une seconde partie 5'b solidaire de la première et qui est inclinée vers le bas par rapport à celle-ci, et à l'extrémité de laquelle est disposé un outil de travail, à savoir une benne 7' dans le présent mode représenté. There is shown in Figure 1 a carrier 1 conforms to the prior art which, so schematic, is provided on its front face with a 3 'charger device. This charger device is consisting of two parallel arms 5 'which are bent and are thus formed of a first part 5'a which, in loader low position, occupies one position substantially horizontal, and a second part 5'b integral with the first and which is inclined downwards relative to it, and at the end of which is arranged a working tool, namely a 7 'bucket in the present mode shown.

    Les bras 5' sont susceptibles d'occuper deux positions extrêmes, à savoir une position basse dans laquelle l'extrémité libre de chaque bras 5' occupe une position H et une position haute dans laquelle l'extrémité libre de ce même bras occupe une position A, le passage de l'une à l'autre de ces positions extrêmes étant obtenu en décrivant un arc de cercle C.The 5 'arms are likely to occupy two positions extremes, namely a low position in which the free end of each arm 5 ′ occupies a position H and a high position in which the free end of this same arm occupies position A, switching from one to the other of these extreme positions being obtained by describing an arc C.

    Si, sur ce même engin de manutention 1 on souhaite pouvoir élever la benne 7' à un niveau supérieur, on rallonge la seconde partie 5'b du bras 5' si bien que pour passer de sa position basse à sa position haute, son extrémité décrit un second arc de cercle C' de plus grand rayon. On constate, dans ces conditions, que le débattement frontal, ou flèche, c'est-à-dire le déplacement maximal horizontal vers l'avant de l'extrémité du bras 5 lorsque celui-ci passe de la position basse H' à la position haute A', augmente fortement le déséquilibre de l'engin ainsi que la gêne mentionnée précédemmentIf, on this same handling machine 1 we wish ability to raise the 7 'bucket to a higher level, extends the second part 5'b of the arm 5 'so that for move from its low position to its high position, its end describes a second larger arc C ' Ray. We note, under these conditions, that the travel frontal, or arrow, that is to say the maximum displacement horizontal forward from the end of arm 5 when it goes from the low position H 'to the high position A ', strongly increases the imbalance of the machine as well as the discomfort mentioned above

    Sur la figure 2 on a représenté le même engin de manutention 1 équipé d'un dispositif chargeur 3 suivant l'invention qui permet d'atteindre la même hauteur maximale A que celui représenté sur la figure 1 avec un débattement frontal bien inférieur, voire même inexistant, permettant de réduire de façon particulièrement substantielle le porte-à-faux exercé par la charge sur l'engin porteur.In Figure 2 there is shown the same machine of handling 1 equipped with a following loader device 3 the invention which achieves the same maximum height A as that shown in Figure 1 with a clearance much lower frontal, even nonexistent, allowing to reduce in a particularly substantial way the overhang exerted by the load on the carrier.

    Le dispositif chargeur 3 représenté sur la figure 3 comprend ainsi une platine de raccordement 2 qui est reliée à un engin de manutention, non représenté sur le dessin. Il comprend un bras principal 5a, qui est monté articulé par l'une de ses extrémités autour d'une articulation 9 de la platine 2. Le dispositif comprend un bras secondaire 5b qui est articulé par l'une de ses extrémités sur l'extrémité libre du bras principal 5a autour d'une articulation 11. L'extrémité libre du bras secondaire 5b comporte une articulation 13 qui reçoit un outil de travail, ici une benne 7.The charger device 3 shown in Figure 3 thus comprises a connection plate 2 which is connected handling equipment, not shown in the drawing. he comprises a main arm 5a, which is mounted articulated by one of its ends around a joint 9 of the plate 2. The device comprises a secondary arm 5b which is articulated by one of its ends on the end free of the main arm 5a around a joint 11. The free end of the secondary arm 5b has a joint 13 which receives a working tool, here a bucket 7.

    Dans le mode de mise en oeuvre représenté sur cette figure, les moyens de mise en rotation des bras principal 5a et secondaire 5b sont constitués par des vérins hydrauliques. Ainsi, le positionnement angulaire du bras principal 5a par rapport à la platine 2 est assuré par un vérin hydraulique 17 dont les deux extrémités sont respectivement solidaires d'une articulation 16 de la platine 2 et d'une articulation 18 d'une seconde platine 19 fixée sur le bras principal 5a. Le positionnement angulaire du bras secondaire 5b, par rapport au bras principal 5a, est assuré quant à lui par un second vérin hydraulique 21 dont une extrémité est solidaire de la platine 19 et l'autre extrémité est solidaire d'une platine 23 fixée sur le bras 5b.In the mode of implementation represented on this figure, the means for rotating the main arm 5a and secondary 5b are constituted by jacks Hydraulic. So the angular positioning of the arm main 5a with respect to plate 2 is provided by a hydraulic cylinder 17 whose two ends are respectively secured to a joint 16 of the plate 2 and an articulation 18 of a second plate 19 fixed on the main arm 5a. Angular positioning of the secondary arm 5b, relative to the main arm 5a, is provided by a second hydraulic cylinder 21 one end of which is integral with the plate 19 and the other end is secured to a plate 23 fixed on arm 5b.

    Le dispositif comporte également des moyens permettant de positionner la benne 7 de façon angulaire afin, par exemple, de la maintenir dans une position horizontale fixe déterminée lorsque le dispositif chargeur passe de la position basse à la position haute et inversement. Ces moyens sont constitués par un troisième vérin hydraulique 22 dont une extrémité est solidaire du bras secondaire 5b et l'autre extrémité attaque des moyens de biellettes solidaires de la benne 7. The device also includes means allowing to position the bucket 7 angularly so, for example, to keep it in a fixed horizontal position determined when the charger switches from low position to high position and vice versa. These means are constituted by a third hydraulic cylinder 22 one end of which is integral with the secondary arm 5b and the other end attacks connecting rod means secured to the bucket 7.

    Le dispositif comprend un distributeur hydraulique 25 qui contrôle l'alimentation en fluide hydraulique (figure 6) des trois vérins 17, 21, 22. Pour ce faire le distributeur 25 est relié à une pompe d'alimentation disposée sur l'engin porteur 1 par une canalisation 27 et un connecteur 29.The device comprises a hydraulic distributor 25 which controls the hydraulic fluid supply (figure 6) of the three cylinders 17, 21, 22. To do this, distributor 25 is connected to a feed pump disposed on the carrier 1 by a pipe 27 and a connector 29.

    Le distributeur 25 est relié à chaque vérin par une double canalisation, il est ainsi relié au vérin 17 par la double canalisation 17', au vérin 21 par la double canalisation 21' et au vérin 22 par la double canalisation 22'. De façon intéressante, en disposant judicieusement le distributeur sur le bras 5b on pourra avoir des canalisations de même longueur ainsi qu'il en est pour les canalisations 21' et 22', ce qui est intéressant au niveau de la maintenance de l'engin.The distributor 25 is connected to each cylinder by a double pipe, it is thus connected to the jack 17 by the double pipe 17 ', to cylinder 21 by double pipe 21 'and to jack 22 by the double pipe 22 '. Interestingly, by judiciously arranging the distributor on arm 5b we can have pipelines of the same length as it is for pipes 21 'and 22', which is interesting in terms of maintenance of the machine.

    On comprend qu'un tel dispositif suivant l'invention est beaucoup plus facile à mettre en oeuvre et à entretenir que ceux suivant l'état antérieur de la technique, ainsi que représenté sur la figure 5, où les éléments identiques ont été pourvus des mêmes références.It is understood that such a device according to the invention is much easier to implement and maintain than those according to the prior art, as well as shown in Figure 5, where identical elements have been given the same references.

    Le distributeur hydraulique 25 est piloté par un calculateur 28 qui est relié à des capteurs qui lui permettent, à tout moment, de connaítre les positions angulaires des deux bras 5a et 5b et de l'outil de travail tel que la benne 7. On a représenté sur la figure 3 les différents paramètres que ces capteurs ont pour charge de mesurer et d'envoyer au calculateur. On fait ainsi appel à un premier capteur 30 qui mesure l'angle α formé par le bras principal 5a avec la platine 2 et plus précisément l'angle formé par l'axe xx' reliant les articulations 9 et 11 et un axe arbitraire de la platine 2 et notamment un axe yy' reliant les articulations 9 et 16.The hydraulic distributor 25 is controlled by a computer 28 which is connected to sensors which allow, at any time, to know the positions of the two arms 5a and 5b and of the working tool such as the bucket 7. There is shown in Figure 3 the different parameters that these sensors are responsible for measure and send to the calculator. We thus call upon a first sensor 30 which measures the angle α formed by the main arm 5a with plate 2 and more precisely the angle formed by the axis xx 'connecting the joints 9 and 11 and an arbitrary axis of the plate 2 and in particular an axis yy 'connecting joints 9 and 16.

    Un second capteur 32 mesure l'angle β formé par les bras principal 5a et secondaire 5b et plus précisément l'angle formé par l'axe xx' et un axe zz' reliant l'articulation 11 à l'articulation 13. Enfin, un troisième capteur 34 mesure l'angle formé par le bras secondaire 5b avec l'outil de travail, et plus précisément par l'axe zz' de ce bras avec un axe de référence uu' de la benne 7.A second sensor 32 measures the angle β formed by the main arm 5a and secondary 5b and more specifically the angle formed by the axis xx 'and an axis zz' connecting joint 11 to joint 13. Finally, a third sensor 34 measures the angle formed by the secondary arm 5b with the working tool, and more precisely by the axis zz ' of this arm with a reference axis uu 'of the bucket 7.

    On pourrait bien entendu en lieu et place des capteurs angulaires 30, 32 et 34 faire appel à des capteurs linéaires mesurant les entraxes respectifs X, Y, Z des vérins de commande 17, 21 et 22 au cours du mouvement, le calculateur 28 étant en mesure de transformer ces variations de longueur en variations angulaires α,β,γ.We could of course replace the sensors angular 30, 32 and 34 use sensors linear measuring the respective centers X, Y, Z of control cylinders 17, 21 and 22 during movement, the calculator 28 being able to transform these length variations in angular variations α, β, γ.

    Il est ainsi possible au calculateur 28 d'assurer facilement une synchronisation des mouvements des bras permettant ainsi lorsque l'on passe d'une position basse à une position haute ou inversement, de ramener vers l'intérieur le bras secondaire 5b lorsque le bras principal 5a pivote vers le haut. Ce double mouvement conjugué permet ainsi à l'outil de travail 7 d'éviter ou de minimiser le débattement vers l'avant du dispositif chargeur au cours de sa montée. On a ainsi représenté sur la figure 4 différentes positions successives de l'outil de travail 7, entre sa position inférieure et sa position supérieure (trajectoire C), de même que l'on a représenté sur la même figure, la trajectoire de cet outil dans une configuration de type classique (trajectoire C'). It is thus possible for the computer 28 to ensure easily synchronized arm movements thus allowing when moving from a low position to a high position or vice versa, to bring back towards inside the secondary arm 5b when the main arm 5a pivots upwards. This double combined movement allows thus to work tool 7 to avoid or minimize the forward travel of the loader during its rise. There is thus shown in Figure 4 different successive positions of the working tool 7, between its lower position and its upper position (trajectory C), just as we have represented on the same figure, the trajectory of this tool in a configuration of classical type (trajectory C ').

    Cette figure montre, de façon claire, que le dispositif chargeur suivant l'invention possède un débattement ainsi qu'un porte-à-faux bien inférieurs à ceux de l'état antérieur de la technique, minimisant ainsi le couple exercé par le dispositif chargeur sur l'engin porteur.This figure clearly shows that the charger device according to the invention has a much less travel and overhang than those of the prior art, thus minimizing the torque exerted by the loader device on the machine carrier.

    Suivant l'invention le calculateur 28 pourra comporter des moyens d'enregistrement et de stockage des valeurs prises par les capteurs 30, 32, 34 au cours d'un mouvement, et des moyens de lecture de ces valeurs et de reproduction de celles-ci par les moyens de commande des bras de façon à pouvoir, à la demande, reproduire tel ou tel type de mouvement préalablement enregistré.According to the invention the computer 28 may include means of recording and storing values taken by the sensors 30, 32, 34 during a movement, and means of reading these values and reproducing of these by the control means of the arms so as to be able, on request, to reproduce this or that type of previously recorded movement.

    Claims (5)

    Dispositif chargeur du type disposé en partie frontale d'un engin porteur (1) et comprenant au moins un bras principal (5a) dont une extrémité est montée à pivotement sur une platine sous l'action de moyens de commande, et qui est pourvu d'un bras secondaire (5b) dont l'une des extrémités est montée articulée à l'extrémité libre du bras principal (5a) et l'autre extrémité reçoit un outil de travail (7), le bras secondaire (5b) étant pourvu de moyens de commande de pivotement, constitués par des vérins hydrauliques (17,21), par rapport au bras principal (5a), caractérisé en ce que les vérins hydrauliques (17,21) sont alimentés par un distributeur (25) qui est disposé sur l'un des bras principal (5a) ou secondaire (5b).Loader device of the type arranged in the front part of a carrier (1) and comprising at least one main arm (5a) one end of which is pivotally mounted on a plate under the action of control means, and which is provided with '' a secondary arm (5b), one end of which is articulated at the free end of the main arm (5a) and the other end receives a working tool (7), the secondary arm (5b) being provided with pivoting control means, constituted by hydraulic cylinders (17,21), with respect to the main arm (5a), characterized in that the hydraulic cylinders (17,21) are supplied by a distributor (25) which is arranged on one of the main (5a) or secondary (5b) arms. Dispositif chargeur suivant la revendication 1 caractérisé en ce qu'il comprend des moyens permettant de régler angulairement le positionnement (β), du bras secondaire (5b) en fonction de la position angulaire (α) du bras principal (5a).Charger device according to claim 1 characterized in that it comprises means making it possible to adjust the positioning (β) of the secondary arm (5b) angularly as a function of the angular position (α) of the main arm (5a). Dispositif suivant la revendication 2 caractérisé en ce que ces moyens de réglage angulaires comprennent un calculateur (28), notamment du type microcontrôleur, comportant des entrées en liaison avec des moyens capteurs (30,32) d'au moins la position des bras principal (5a) et secondaire (5b), et des sorties aptes à agir sur des moyens de commande (17,21) de position de ces bras (5a,5b).Device according to Claim 2, characterized in that these angular adjustment means comprise a computer (28), in particular of the microcontroller type, comprising inputs connected to sensor means (30, 32) of at least the position of the main arms ( 5a) and secondary (5b), and outputs capable of acting on control means (17, 21) for positioning these arms (5a, 5b). Dispositif suivant la revendication 3 caractérisé en ce que le calculateur (28) comprend une entrée en liaison avec des moyens capteurs (34) de la position de l'outil (7) et une sortie apte à agir sur des moyens de commande (22) de positon de celui-ci.Device according to claim 3 characterized in that the computer (28) comprises an input in connection with sensor means (34) of the position of the tool (7) and an output capable of acting on control means (22) of its position. Dispositif suivant l'une des revendications 3 ou 4 caractérisé en ce que le calculateur comprend des moyens d'enregistrement et de stockage des valeurs fournies par les capteurs au cours d'un mouvement et des moyens de lecture de ces valeurs et de reproduction de celles-ci par des moyens de commande (17,21,22) de position des bras (5a,5b,7).Device according to either of Claims 3 and 4, characterized in that the computer comprises means for recording and storing the values supplied by the sensors during a movement and means for reading these values and reproducing those -this by control means (17, 21, 22) for positioning the arms (5a, 5b, 7).
    EP01403112A 2000-12-04 2001-12-04 Front-loading attachement for a carrier vehicle Withdrawn EP1211357A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0015677 2000-12-04
    FR0015677A FR2817574B1 (en) 2000-12-04 2000-12-04 FRONT LOADER FOR CARRIER

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    EP1211357A1 true EP1211357A1 (en) 2002-06-05

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    WO2009091473A1 (en) * 2008-01-15 2009-07-23 Trimble Navigation Limited Loader implement elevation control system
    WO2014149125A1 (en) * 2013-03-15 2014-09-25 Rodney Koch Lift arm structure with an articulated knee portion for a power machine
    US9267262B2 (en) 2014-06-06 2016-02-23 Caterpillar Sarl Lift arm linkage with extension cylinder
    US10392773B2 (en) * 2016-08-17 2019-08-27 Caterpillar Sarl Linkage assembly for machine
    IT202000024499A1 (en) * 2020-10-16 2021-01-16 Vincenzo Autieri REMOVABLE DEVICE OPTIMIZED FOR A TRACTOR MACHINE

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    IT202000024499A1 (en) * 2020-10-16 2021-01-16 Vincenzo Autieri REMOVABLE DEVICE OPTIMIZED FOR A TRACTOR MACHINE

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