EP0750702B1 - Digger-loader - Google Patents

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Publication number
EP0750702B1
EP0750702B1 EP95912312A EP95912312A EP0750702B1 EP 0750702 B1 EP0750702 B1 EP 0750702B1 EP 95912312 A EP95912312 A EP 95912312A EP 95912312 A EP95912312 A EP 95912312A EP 0750702 B1 EP0750702 B1 EP 0750702B1
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EP
European Patent Office
Prior art keywords
bucket
shovel
digger
loader
articulated
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.)
Expired - Lifetime
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EP95912312A
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German (de)
French (fr)
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EP0750702A1 (en
Inventor
Claude Blondiaux
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Individual
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Individual
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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
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E02F3/964—Arrangements on backhoes for alternate use of different tools of several tools mounted on one machine

Definitions

  • the invention relates to an improved backhoe loader according to the preamble of claim 1.
  • Such a backhoe loader is known from DE-A-3 932 555.
  • a backhoe loader is a motorized machine, comprising on the one hand, a bucket moved hydraulically and capable load more or less material, in particular of loose material, such as earth, and on the other hand a shovel, positioned at the end of an articulated arm, also mu hydraulically, and intended for digging trenches in particular.
  • the bucket is at the front of this type of machine and the shovel at the back.
  • the seat and the machine controls are subject to rotation of 180 °, depending on whether you want to load soil or materials furniture or digging, especially trenches.
  • it is often required to carry out the machine itself such a rotation of 180 °, involving numerous maneuvers, especially when evolves in areas of reduced surface, and especially in the streets.
  • the object of the invention overcomes these drawbacks.
  • a backhoe loader comprising a bucket and a shovel, said shovel being mounted at the end of an articulated arm, and the bucket and the shovel being driven in particular by hydraulic means, characterized in that the bucket and the shovel are implanted and articulated at the same end of the backhoe loader.
  • the invention consists in positioning the bucket and the shovel either at the front of the backhoe loader or at the rear, so to be able to carry out the loading operation almost simultaneously and digging, without changing the driver's position or orientation of the machine, which the backhoe loaders known to date did not allow to get.
  • the shovel can empty the material directly into the bucket, which can then rise to a sufficient height to empty its contents, thereby avoiding rework of said material, and therefore generating an appreciable time saving.
  • the arm actuator of the shovel is mounted on a ring gear or equivalent, vertical axis of rotation integral with the chassis, and on the periphery of which meshes with a pinion actuated by a gear motor.
  • the shovel can rotate about 250 °, so as to leave the field free when the bucket is actuated.
  • the base of the arm of the shovel is articulated on the chassis of the machine according to a hinge axis oriented horizontally and perpendicular to the longitudinal axis of the machine, so as to allow an increase in the tilting of said arm towards the center of the machine by the increased effect of its lifting, and at thus allow, after having folded the shovel to the maximum against his arm actuation, to give the bucket optimum travel.
  • the heat engine ensuring the progression of the backhoe loader and the hydraulic motor associated with the heat engine, intended to allow the hydraulic activation of the bucket and the shovel are positioned under or at or above the driver's seat generally behind the control station, so as to free the traditional location of the engine, i.e. at the front of the machine to allow the positioning of pistons, jacks and axes articulation of the bucket and the articulated arm respectively at the end from which the shovel is mounted.
  • the steering axis of the front steering wheels is laterally off-center.
  • a drawbar can be reversibly attached to the backhoe loader to allow its movement in towed mode, says drawbar further comprising an articulated connecting rod, the other end of which is intended to be fixed also reversibly in the vicinity of the upper attachment point of the actuating arm lifting cylinder the shovel, so as to induce the lifting of the front wheels of the machine when said cylinder is activated.
  • the elevation of the wheels front of the machine results from the support exerted by the bucket on said drawbar, a connecting rod being also secured reversibly on the arms of the bucket and on the chassis of the machine, in order to guarantee the fixed maintenance of the coupling according to this position.
  • Figure 1 is a schematic representation of a side view of the backhoe loader according to the invention.
  • Figure 2 is a front three-quarter view of the backhoe loader of the figure 1.
  • Figure 3 is a schematic perspective representation of a another embodiment of the invention.
  • Figure 4 is a schematic plan view, representative of the operation of the machine according to FIG. 3.
  • Figure 5 is a schematic perspective view of another embodiment of the invention.
  • Figure 6 is a schematic perspective representation of a possibility of coupling the machine according to the invention.
  • the backhoe loader according to the invention is traditionally moved by two rear wheel drive (1) (but it can just as easily be four wheels (1, 2), or even by means of tracks), and is steered by two front directional wheels (2), whose orientation is ensured by via a steering wheel (3) acting at a directional axis (4), itself intervening at the level of the steering shaft connecting the two front wheels (2).
  • the heat engine (5) is located under the seat (6) of the driver, and ensures on the one hand, the progression in translation of the backhoe loader, and secondly, the operation of a hydraulic motor intended to allow the operation of the various tools mounted on the backhoe loader.
  • the backhoe loader comprises in the rear position a three-point hitch, represented by reference (7), at which can be mounted all traditional tools including such a system hitch.
  • the front part of the backhoe loader has a bucket loader (9), articulated at the end of two arms (10), themselves articulated at their other ends at an articulated axis (11) of the chassis (8).
  • This bucket (9) is moved in an upward and downward trajectory by means of a piston-cylinder assembly (15) also integral with the chassis (8), and acting at the level of a connecting member (23), secured to the two arms (10) in the immediate vicinity of the articulation axis (11) of said arms.
  • the arm (13) also comprises three jacks (16, 17, 18), intended to ensure respectively the lifting of the pillar (30), of the pendulum (32) by relative to the boom (31), and of the shovel (12) relative to the pendulum (32).
  • the arm (13) is susceptible to movement between the two articulated arms (10) of the bucket (9).
  • the pillar (30) of the articulated arm (13) supporting the shovel (12) is articulated on the chassis (8) relative to an axis of articulation (14) horizontal and extending perpendicularly by relative to the longitudinal axis (26) of the machine.
  • This axis (14) is also positioned upstream of the articulation axis (11) of the arms (10) of the bucket (9), and the location of the jack (15), so as to allow the shovel (12) to directly empty its contents into the bucket (9) if necessary if necessary.
  • the pillar (30) and the jack (16) which actuates it are secured at their base to a crown toothed (33) with vertical axis of rotation secured to the chassis ( Figure 3), on the periphery of which meshes the pinion (34) of a geared motor (35), advantageously actuated hydraulically.
  • the arm (13) is capable of rotation, for example close to 250 °, suitable for bringing backwards, that is to say towards the control station, the shovel (12), and thus free the front of the machine to allow work to a maximum amplitude of the bucket (9).
  • a drawbar (21) can be attached reversibly to the front of the backhoe loader, for example by bolting, or by means of axle - pin assemblies.
  • a drawbar comprises at its free end a hook (22), likely to be fixed on a tow ball, well known for this application.
  • this drawbar comprises an articulated connecting rod (24), capable of being fixed, also reversibly in the vicinity of the upper attachment point of the jack (16) of the arm (13).
  • the elevation of the wheels front of the machine during its transpor results from the support exerted by the bucket (9) on said drawbar (21), a connecting rod (25) being further secured reversibly on the arms (10) of the bucket (9) and on the chassis (8) of the machine, in order to guarantee that the hitch remains fixed in this position.
  • the backhoe loader of the invention provides greater ease of use, due to its structure, particularly in the context of works where one wishes to carry out simultaneously the operations of loading and digging, but also in places where the possibilities of evolution are reduced.

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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)
  • Shovels (AREA)
  • Operation Control Of Excavators (AREA)

Description

L'invention concerne un tractopelle perfectionné selon la préambule de la revendication 1.The invention relates to an improved backhoe loader according to the preamble of claim 1.

Un tel tractopelle est connu de DE-A-3 932 555.Such a backhoe loader is known from DE-A-3 932 555.

De manière connue, un tractopelle est un engin motorisé, comportant d'une part, un godet mu par voie hydraulique et susceptible de charger une quantité plus ou moins importante de matériaux, notamment de matériau meuble, tel que de la terre, et d'autre part une pelle, positionnée à l'extrémité d'un bras articulé, également mu hydrauliquement, et destinée à creuser notamment des tranchées.In known manner, a backhoe loader is a motorized machine, comprising on the one hand, a bucket moved hydraulically and capable load more or less material, in particular of loose material, such as earth, and on the other hand a shovel, positioned at the end of an articulated arm, also mu hydraulically, and intended for digging trenches in particular.

De manière générale, le godet se trouve à l'avant de ce type d'engin et la pelle à l'arrière.Generally, the bucket is at the front of this type of machine and the shovel at the back.

Afin de permettre l'utilisation de la pelle et du godet, le siège et les commandes de l'engin sont susceptibles de subir une rotation de 180 °, selon que l'on désire procéder au chargement de terre ou de matériaux meubles ou au creusement, notamment de tranchées. En outre, il est souvent requis de faire procéder à l'engin lui-même une telle rotation de 180°, impliquant de nombreuses manoeuvres, notamment lorsqu'il évolue dans des zones de surface réduite, et tout particulièrement dans les rues.In order to allow the use of the shovel and the bucket, the seat and the machine controls are subject to rotation of 180 °, depending on whether you want to load soil or materials furniture or digging, especially trenches. In addition, it is often required to carry out the machine itself such a rotation of 180 °, involving numerous maneuvers, especially when evolves in areas of reduced surface, and especially in the streets.

Si lorsque ces deux types de travaux sont bien différenciés, notamment dans le temps, ce genre de tractopelle donne entière satisfaction, il n'en est pas de même dès lors que, comme cela peut être requis pour certains travaux, on souhaite procéder au creusement et à l'enlèvement simultanés de la terre, ou lorsque l'engin doit évoluer dans un espace réduit, insuffisant pour manoeuvrer, et entrainant de fait des pertes de temps conséquentes. If when these two types of work are well differentiated, especially in time, this kind of backhoe loader gives whole satisfaction, it is not the same since, as may be required for certain works, we wish to dig and the simultaneous removal of the earth, or when the machine must evolve in a reduced space, insufficient to maneuver, and in fact causing consequent loss of time.

L'objet de l'invention permet de s'affranchir de ces inconvénients.The object of the invention overcomes these drawbacks.

L'objet de l'invention est solutionée par les charactéristiques de la revendication 1.The object of the invention is solved by the characteristics of claim 1.

Elle propose un tractopelle comportant un godet et une pelle, ladite pelle étant montée à l'extrémité d'un bras articulé, et le godet et la pelle étant mus notamment par voie hydraulique, caractérisé en ce que le godet et la pelle sont implantés et articulés au niveau de la même extrémité du tractopelle.It offers a backhoe loader comprising a bucket and a shovel, said shovel being mounted at the end of an articulated arm, and the bucket and the shovel being driven in particular by hydraulic means, characterized in that the bucket and the shovel are implanted and articulated at the same end of the backhoe loader.

En d'autres termes, l'invention consiste à positionner le godet et la pelle soit au niveau de l'avant du tractopelle, soit à l'arrière, de telle sorte à pouvoir assurer quasiment simultanément l'opération de chargement et de creusement, sans changer la position du conducteur, ni l'orientation de l'engin, ce que les tractopelles connus à ce jour ne permettaient pas d'obtenir.In other words, the invention consists in positioning the bucket and the shovel either at the front of the backhoe loader or at the rear, so to be able to carry out the loading operation almost simultaneously and digging, without changing the driver's position or orientation of the machine, which the backhoe loaders known to date did not allow to get.

Selon une caractéristique avantageuse de l'invention, la pelle peut vider directement le matériau dans le godet, qui peut alors s'élever à une hauteur suffisante pour vider son contenu, évitant de la sorte une reprise dudit matériau, et partant engendrant un gain de temps appréciable.According to an advantageous characteristic of the invention, the shovel can empty the material directly into the bucket, which can then rise to a sufficient height to empty its contents, thereby avoiding rework of said material, and therefore generating an appreciable time saving.

Selon une autre caractéristique avantageuse de l'invention, et dans le but d'augmenter l'amplitude du débattement du godet, le bras d'actionnement de la pelle est monté sur une couronne dentée ou équivalent, d'axe de rotation vertical solidaire du chassis, et sur la périphérie de laquelle engrène un pignon actionné par un moto-réducteur. De la sorte, la pelle peut pivoter d'environ 250°, de telle sorte à laisser le champ libre à l'actionnement du godet.According to another advantageous characteristic of the invention, and in the purpose of increasing the amplitude of the bucket travel, the arm actuator of the shovel is mounted on a ring gear or equivalent, vertical axis of rotation integral with the chassis, and on the periphery of which meshes with a pinion actuated by a gear motor. In this way, the shovel can rotate about 250 °, so as to leave the field free when the bucket is actuated.

Selon une autre caractéristique de l'invention, la base du bras de la pelle est articulée sur le chassis de l'engin selon un axe d'articulation orienté horizontalement et perpendiculairement à l'axe longitudinal de l'engin, de telle sorte à permettre un accroissement du basculement dudit bras en direction du centre de l'engin par l'effet accru de son relevage, et à ainsi permettre, après avoir replié la pelle au maximum contre son bras d'actionnement, de conférer au godet un débattement optimum.According to another characteristic of the invention, the base of the arm of the shovel is articulated on the chassis of the machine according to a hinge axis oriented horizontally and perpendicular to the longitudinal axis of the machine, so as to allow an increase in the tilting of said arm towards the center of the machine by the increased effect of its lifting, and at thus allow, after having folded the shovel to the maximum against his arm actuation, to give the bucket optimum travel.

Avantageusement, le moteur thermique assurant la progression du tractopelle et le moteur hydraulique associé au moteur thermique, destiné à permettre l'activation hydraulique du godet et de la pelle, sont positionnés sous ou au niveau du siège du conducteur, ou plus généralement en arrière du poste de commande, de telle sorte à libérer l'emplacement traditionnel du moteur, c'est à dire au niveau de l'avant de l'engin pour permettre le positionnement des pistons, verins et axes d'articulation respectivement du godet et du bras articulé à l'extrémité duquel est montée la pelle.Advantageously, the heat engine ensuring the progression of the backhoe loader and the hydraulic motor associated with the heat engine, intended to allow the hydraulic activation of the bucket and the shovel, are positioned under or at or above the driver's seat generally behind the control station, so as to free the traditional location of the engine, i.e. at the front of the machine to allow the positioning of pistons, jacks and axes articulation of the bucket and the articulated arm respectively at the end from which the shovel is mounted.

Pour la même raison, l'axe de direction des roues avants directrices est décentré latéralement.For the same reason, the steering axis of the front steering wheels is laterally off-center.

Avantageusement, un timon peut être fixé réversiblement au tractopelle afin de permettre son déplacement en mode tracté, le dit timon comprenant en outre une bielle articulée, dont l'autre extrémité est destinée à venir se fixer également réversiblement au voisinage du point d'attache supérieur du vérin de relevage du bras d'actionnement de la pelle, de telle sorte à induire le soulèvement des roues avants de l'engin lorsque ledit vérin est activé.Advantageously, a drawbar can be reversibly attached to the backhoe loader to allow its movement in towed mode, says drawbar further comprising an articulated connecting rod, the other end of which is intended to be fixed also reversibly in the vicinity of the upper attachment point of the actuating arm lifting cylinder the shovel, so as to induce the lifting of the front wheels of the machine when said cylinder is activated.

Selon une autre caractéristique de l'invention, l'élévation des roues avants de l'engin résulte de l'appui exercé par le godet sur ledit timon, une bielle étant en outre solidarisée reversiblement sur les bras du godet et sur le chassis de l'engin, afin de garantir le maintien fixe de l'attelage selon cette position. According to another characteristic of the invention, the elevation of the wheels front of the machine results from the support exerted by the bucket on said drawbar, a connecting rod being also secured reversibly on the arms of the bucket and on the chassis of the machine, in order to guarantee the fixed maintenance of the coupling according to this position.

La manière dont l'invention peut être réalisée et les avantages qui en découlent ressortiront mieux de l'exemple de réalisation qui suit donné à titre indicatif et non limitatif à l'appui des figures annexées.The manner in which the invention can be realized and the advantages which will emerge more clearly from the example of embodiment which follows given as an indication and not limiting in support of the appended figures.

La figure 1 est une représentation schématique d'une vue latérale du tractopelle conforme à l'invention.Figure 1 is a schematic representation of a side view of the backhoe loader according to the invention.

La figure 2 est une vue de trois quarts avant du tractopelle de la figure 1.Figure 2 is a front three-quarter view of the backhoe loader of the figure 1.

La figure 3 est une représentation schématique en perspective d'une autre forme de réalisation de l'invention.Figure 3 is a schematic perspective representation of a another embodiment of the invention.

La figure 4 est une vue schématique en plan, représentative du fonctionnement de l'engin selon la figure 3.Figure 4 is a schematic plan view, representative of the operation of the machine according to FIG. 3.

La figure 5 est une vue schématique en perspective d'une autre forme de réalisation de l'invention.Figure 5 is a schematic perspective view of another embodiment of the invention.

La figure 6 est une représentation schématique en perspective d'une possibilité d'attelage de l'engin conforme à l'invention.Figure 6 is a schematic perspective representation of a possibility of coupling the machine according to the invention.

Le tractopelle conforme à l'invention est mû traditionnellement par deux roues arrière motrices (1) (mais il peut tout aussi bien l'être par les quatre roues (1, 2), voire au moyen de chenilles), et est dirigé par deux roues avants directionnelles (2), dont l'orientation est assurée par l'intermédiaire d'un volant (3) agissant au niveau d'un axe directionnel (4), lui-même intervenant au niveau de l'arbre de direction reliant les deux roues avant (2).The backhoe loader according to the invention is traditionally moved by two rear wheel drive (1) (but it can just as easily be four wheels (1, 2), or even by means of tracks), and is steered by two front directional wheels (2), whose orientation is ensured by via a steering wheel (3) acting at a directional axis (4), itself intervening at the level of the steering shaft connecting the two front wheels (2).

Selon l'invention, le moteur thermique (5) est situé sous le siège (6) du conducteur, et assure d'une part, la progression en translation du tractopelle, et d'autre part, le fonctionnement d'un moteur hydraulique destiné à permettre le fonctionnement des différents outils montés sur le tractopelle. According to the invention, the heat engine (5) is located under the seat (6) of the driver, and ensures on the one hand, the progression in translation of the backhoe loader, and secondly, the operation of a hydraulic motor intended to allow the operation of the various tools mounted on the backhoe loader.

Avantageusement, le tractopelle comprend en position arrière un attelage trois points, representé par la référence (7), au niveau duquel peuvent être montés tous outils traditionnels comportant un tel système d'attelage.Advantageously, the backhoe loader comprises in the rear position a three-point hitch, represented by reference (7), at which can be mounted all traditional tools including such a system hitch.

Selon l'invention, la partie avant du tractopelle comporte un godet chargeur (9), articulé à l'extrémité de deux bras (10), eux-mêmes articulés à leurs autres extrémités au niveau d'un axe d'articulation (11) solidaire du chassis (8). Ce godet (9) est mû en trajectoire ascendante et descendante au moyen d'un ensemble piston-vérin (15) également solidaire du chassis (8), et agissant au niveau d'un organe de liaison (23), solidarisé aux deux bras (10) à proximité immédiate de l'axe d'articulation (11) desdits bras.According to the invention, the front part of the backhoe loader has a bucket loader (9), articulated at the end of two arms (10), themselves articulated at their other ends at an articulated axis (11) of the chassis (8). This bucket (9) is moved in an upward and downward trajectory by means of a piston-cylinder assembly (15) also integral with the chassis (8), and acting at the level of a connecting member (23), secured to the two arms (10) in the immediate vicinity of the articulation axis (11) of said arms.

Parallèlement, le tractopelle comporte, également en partie avant, une pelle (12), elle-même articulée à l'extrémité d'un bras repliable (13), se décomposant en trois parties, à savoir :

  • un pilier (30) relié au chassis (8) ;
  • une flèche (31) fixée à l'extrémité supérieure du pilier (30) ;
  • et un balancier (32), articulée à l'autre extrémité de la flèche (31), et portant la pelle (12).
At the same time, the backhoe loader also includes, in the front part, a shovel (12), itself articulated at the end of a folding arm (13), broken down into three parts, namely:
  • a pillar (30) connected to the chassis (8);
  • an arrow (31) fixed to the upper end of the pillar (30);
  • and a pendulum (32), articulated at the other end of the boom (31), and carrying the shovel (12).

Le bras (13) comporte également trois vérins (16, 17, 18), destinés à assurer respectivement, le relevage du pilier (30), du balancier (32) par rapport à la flèche (31), et de la pelle (12) par rapport au balancier (32).The arm (13) also comprises three jacks (16, 17, 18), intended to ensure respectively the lifting of the pillar (30), of the pendulum (32) by relative to the boom (31), and of the shovel (12) relative to the pendulum (32).

Par ailleurs, le bras (13) est susceptible d'un débattement entre les deux bras articulés (10) du godet (9).Furthermore, the arm (13) is susceptible to movement between the two articulated arms (10) of the bucket (9).

Dans une première forme de réalisation de l'invention, par exemple représentée sur les figures 1 et 2, le pilier (30) du bras articulé (13) supportant la pelle (12) est articulé sur le chassis (8) par rapport à un axe d'articulation (14) horizontale et s'étendant perpendiculairement par rapport à l'axe longitudinal (26) de l'engin. Cet axe (14) est en outre positionné en amont de l'axe d'articulation (11) des bras (10) du godet (9), et du lieu d'implantation du vérin (15), de telle sorte à permettre à la pelle (12) de vider directement son contenu dans le godet (9) le cas échéant. De la sorte, le déplacement relatif du godet (9) et de la pelle (12) peut s'effectuer sans entrave ni gêne, permettant ainsi un travail simultané de ces deux outils, et partant, pour certaines applications, générer un gain de temps conséquent, dans la mesure où le conducteur n'a pas à effectuer toute une série de manoeuvres pour alternativement utiliser le godet, puis la pelle.In a first embodiment of the invention, for example shown in Figures 1 and 2, the pillar (30) of the articulated arm (13) supporting the shovel (12) is articulated on the chassis (8) relative to an axis of articulation (14) horizontal and extending perpendicularly by relative to the longitudinal axis (26) of the machine. This axis (14) is also positioned upstream of the articulation axis (11) of the arms (10) of the bucket (9), and the location of the jack (15), so as to allow the shovel (12) to directly empty its contents into the bucket (9) if necessary if necessary. In this way, the relative movement of the bucket (9) and the shovel (12) can be done without hindrance or discomfort, allowing work simultaneous of these two tools, and therefore, for certain applications, generate significant time savings, insofar as the driver does not have to perform a whole series of maneuvers to alternately use the bucket, then the shovel.

Dans un souci d'optimisation du débattement du godet dans le plan vertical, on accroit la possibilité de basculement du pilier (30) du bras articulé (13) en direction du centre de l'engin, ce basculement extrême étant obtenu par relevage maximum du vérin (16) correspondant. On aboutit de la sorte à replier la pelle (12) au maximum contre le bras (13), et ainsi libérer l'accès pour le godet à un débattement vertical optimum (figure 5).In order to optimize the travel of the bucket in the plane vertical, the possibility of tilting the pillar (30) of the arm is increased articulated (13) towards the center of the machine, this extreme tilting being obtained by maximum lifting of the corresponding jack (16). We thus results in folding the shovel (12) as far as possible against the arm (13), and thus freeing access for the bucket to optimum vertical travel (figure 5).

Selon une autre forme de réalisation de l'invention, et toujours dans le but d'optimiser le débattement vertical du godet (12), le pilier (30) et le vérin (16) qui l'actionne sont solidarisés à leur base à une couronne dentée (33) à axe de rotation vertical solidarisé au chassis (figure 3), sur la périphérie de laquelle vient engrèner le pignon (34) d'un motoréducteur (35), avantageusement actionné par voie hydraulique. Ainsi, et comme on peut le voir sur la figure 4, le bras (13) est susceptible d'une rotation, par exemple voisine de 250°, propre à amener vers l'arrière, c'est à dire vers le poste de commande, la pelle (12), et ainsi libérer l'avant de l'engin pour permettre le travail selon une amplitude maximum du godet (9). According to another embodiment of the invention, and always in order to optimize the vertical clearance of the bucket (12), the pillar (30) and the jack (16) which actuates it are secured at their base to a crown toothed (33) with vertical axis of rotation secured to the chassis (Figure 3), on the periphery of which meshes the pinion (34) of a geared motor (35), advantageously actuated hydraulically. So, and like can be seen in FIG. 4, the arm (13) is capable of rotation, for example close to 250 °, suitable for bringing backwards, that is to say towards the control station, the shovel (12), and thus free the front of the machine to allow work to a maximum amplitude of the bucket (9).

Afin en outre de libérer l'espace nécessaire au débattement, d'une part des bras d'articulation et de fonctionnement (10) du godet (9) et (13) de la pelle (12), l'arbre de direction (19), relié mécaniquement ou hydrauliquement au moyen de bielles traditionnelles aux cardans de l'axe de direction (20) des roues avants directionnelles (2), et actionné par le volant (3) est décalé latéralement, ainsi que l'on peut l'observer sur la figure 2.In addition, to free up the space required for travel, part of the articulation and operating arms (10) of the bucket (9) and (13) shovel (12), the steering shaft (19), mechanically or hydraulically connected by means of traditional connecting rods to the universal joints of the steering axis (20) front directional wheels (2), and actuated by the steering wheel (3) is laterally offset, as can be seen in Figure 2.

Selon une caractéristique avantageuse de l'invention, un timon (21) peut être fixé réversiblement à l'avant du tractopelle, par exemple par boulonnage, ou au moyen d'ensembles axes - goupilles. De manière connue, un tel timon comporte à son extrémité libre un crochet (22), susceptible de venir se fixer sur une boule de remorquage, bien connue pour cette application. En outre, ce timon comporte une bielle articulée (24), susceptible de se fixer, également réversiblement au voisinage du point d'attache supérieur du vérin (16) du bras (13).According to an advantageous characteristic of the invention, a drawbar (21) can be attached reversibly to the front of the backhoe loader, for example by bolting, or by means of axle - pin assemblies. So known, such a drawbar comprises at its free end a hook (22), likely to be fixed on a tow ball, well known for this application. In addition, this drawbar comprises an articulated connecting rod (24), capable of being fixed, also reversibly in the vicinity of the upper attachment point of the jack (16) of the arm (13).

De la sorte, une fois le timon (21) en place sur le tractopelle, avec la bielle (24) également fixée comme précisé précédemment, et attelé à une boule de remorquage, le conducteur du tractopelle fait porter l'extrémité de la pelle (12) sur le timon (21), puis en agissant au niveau du vérin (16), provoque le soulèvement des roues avant directrices (2) par réaction. Ainsi, seules les roues arrières portent, et le tractopelle peut être très aisément transporté sur son lieu de travail.In this way, once the drawbar (21) in place on the backhoe loader, with the connecting rod (24) also fixed as specified above, and coupled to a tow ball, backhoe loader driver carries end shovel (12) on the drawbar (21), then acting at the level of the jack (16), causes the front steering wheels (2) to rise by reaction. So only the rear wheels carry, and the backhoe can be very easily transported to the workplace.

Selon une autre forme de réalisation de l'invention, plus particulièrement décrite en liaison avec la figure 6, l'élévation des roues avants de l'engin lors de son transpor résulte de l'appui exercé par le godet (9) sur ledit timon (21), une bielle (25) étant en outre solidarisée reversiblement sur les bras (10) du godet (9) et sur le chassis (8) de l'engin, afin de garantir le maintien fixe de l'attelage selon cette position. According to another embodiment of the invention, more particularly described in connection with FIG. 6, the elevation of the wheels front of the machine during its transpor results from the support exerted by the bucket (9) on said drawbar (21), a connecting rod (25) being further secured reversibly on the arms (10) of the bucket (9) and on the chassis (8) of the machine, in order to guarantee that the hitch remains fixed in this position.

Ainsi, le tractopelle de l'invention procure-t-il une plus grande facilité d'utilisation, de par sa structure, notamment dans le cadre de travaux où l'on souhaite mener simultanément les opérations de chargement et de creusement, mais également en des lieux dans lesquels les possibilités d'évolution sont réduites.Thus, the backhoe loader of the invention provides greater ease of use, due to its structure, particularly in the context of works where one wishes to carry out simultaneously the operations of loading and digging, but also in places where the possibilities of evolution are reduced.

Claims (9)

  1. Digger-loader comprising a bucket (9) and a shovel (12), the bucket and the shovel being mounted at the end of articulated arms (10, 13), and the bucket and the shovel being driven especially by hydraulic means, characterized :
    in that the bucket (9) and the shovel (12) are fitted and articulated at the same end of the digger-loader ;
    in that the arms (10) at the end of which is mounted the bucket (9) are bent;
    and in that the ends of the arms (10) opposite to the end carrying the bucket (9) are articulated at the top end of a head-frame.
  2. Digger-loader according to Claim 1, characterized in that the bucket (9) and the shovel (12) are fitted and articulated in the vicinity of the front end of the chassis (8) of the digger-loader.
  3. Digger-loader according to either of Claims 1 and 2, characterized in that the arm (13) operating the shovel (12) is mounted on a ring gear or equivalent (33) which has a vertical axle of rotation integral with the chassis (8), and on the periphery of which there meshes a pinion (34) operated by a geared motor (35), in such a way as to permit the pivoting of the shovel (12).
  4. Digger-loader according to either of Claims 1 and 2, characterized in that the pillar (30) of the arm (13) operating the shovel (12) is articulated on the chassis (8) of the machine, with an axle of articulation (14) which is oriented horizontally and perpendicular to the longitudinal axis (26) of the machine, in such a way as to permit an increase in the tilting of said arm in the direction of the center of the machine via the increased effect of its elevation, and thus, after the shovel (12) has been folded back to the maximum extent against its operating arm (13), in order to provide the bucket (9) with an optimum clearance.
  5. Digger-loader according to one of Claims 1 to 4, characterized in that the shovel (12) can empty its contents directly into the bucket (9).
  6. Digger-loader according to one of Claims 1 to 5, characterized in that the thermal engine (5) providing for the advance movement of the digger-loader, and the hydraulic motor which is associated with the thermal engine and which is intended to permit hydraulic actuation of the articulation arms (10, 13) of the bucket (9) and of the shovel (12), are positioned under or at the level of the seat (6) for the operator, or to the rear of this seat.
  7. Digger-loader according to one of Claims 1 to 6, characterized in that the steering shaft (4) operating the steering spindle (20) of the directional front wheels (2) is off-centered laterally.
  8. Digger-loader according to one of Claims 1 to 7, characterized in that a drawbar (21) can be fixed reversibly to the digger-loader, said drawbar (21) comprising in addition an articulated connection rod (24) whose other end is intended to be fixed, again reversibly, in the vicinity of the upper attachment point of the jack (16) of the pillar (50) of the arm (13) operating the shovel (12), in such a way as to induce the raising of the front wheels (2) when said jack is actuated.
  9. Digger-loader according to one of Claims 1 to 8, characterized in that a drawbar (21) can be fixed reversibly to the digger-loader, said drawbar (21) comprising in addition a connection rod (25) which is fitted reversibly on the arms (10) of the bucket (9) and on the chassis (8) of the machine, in order to guarantee that the linkage system is held fixed in this position, said bucket being applied on the drawbar (21) in order to induce the raising of the front wheels (2).
EP95912312A 1994-03-16 1995-03-14 Digger-loader Expired - Lifetime EP0750702B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9403307 1994-03-16
FR9403307A FR2717515B1 (en) 1994-03-16 1994-03-16 Backhoe loader.
PCT/FR1995/000301 WO1995025202A1 (en) 1994-03-16 1995-03-14 Digger-loader

Publications (2)

Publication Number Publication Date
EP0750702A1 EP0750702A1 (en) 1997-01-02
EP0750702B1 true EP0750702B1 (en) 2000-01-05

Family

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Application Number Title Priority Date Filing Date
EP95912312A Expired - Lifetime EP0750702B1 (en) 1994-03-16 1995-03-14 Digger-loader

Country Status (5)

Country Link
EP (1) EP0750702B1 (en)
DE (1) DE69514339T2 (en)
ES (1) ES2143618T3 (en)
FR (1) FR2717515B1 (en)
WO (1) WO1995025202A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101413279B (en) * 2008-11-29 2011-06-08 湖南山河智能机械股份有限公司 Electromechanical integrated digging loader and control method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807586A (en) * 1971-06-07 1974-04-30 Channel Construction Inc Material handling apparatus
NO155406C (en) * 1984-01-31 1987-03-25 Willy Bergesen DEVICE FOR TRACTOR-MOUNTED EXCAVATOR.
JPS62202130A (en) * 1986-02-28 1987-09-05 Kubota Ltd Back hoe
DE3932555A1 (en) * 1989-09-29 1991-04-11 Schaeff Karl Gmbh & Co Combined excavator and loader - has excavator mounted on driver's cab so that it does not obstruct driver's view
WO1993006306A1 (en) * 1991-09-25 1993-04-01 STRUNK, Carolyn, E. Apparatus to prepare a road surface

Also Published As

Publication number Publication date
FR2717515A1 (en) 1995-09-22
DE69514339T2 (en) 2000-08-24
DE69514339D1 (en) 2000-02-10
FR2717515B1 (en) 1996-04-19
ES2143618T3 (en) 2000-05-16
WO1995025202A1 (en) 1995-09-21
EP0750702A1 (en) 1997-01-02

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