EP1882782B1 - Cutting head for a digging machine - Google Patents

Cutting head for a digging machine Download PDF

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Publication number
EP1882782B1
EP1882782B1 EP07112941.5A EP07112941A EP1882782B1 EP 1882782 B1 EP1882782 B1 EP 1882782B1 EP 07112941 A EP07112941 A EP 07112941A EP 1882782 B1 EP1882782 B1 EP 1882782B1
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EP
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Prior art keywords
hydraulic motor
motor
cutter
mounting structure
end portion
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EP07112941.5A
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German (de)
French (fr)
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EP1882782A1 (en
Inventor
Philippe Chagnot
Jean-Claude Riglet
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Soletanche Freyssinet SA
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Soletanche Freyssinet SA
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Publication of EP1882782A1 publication Critical patent/EP1882782A1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/16—Machines for digging other holes in the soil
    • E02F5/20—Machines for digging other holes in the soil for vertical holes
    • 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
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines

Definitions

  • the present invention relates to a cutting head for an excavating machine usually referred to as a milling cutter.
  • Cutting-type excavating machines are most often used to make trenches of relatively large depth, up to 100 meters, in the soil, and of relatively small width relative to said depth, the width typically being between 500 mm. and 1500 mm.
  • One of the interests of these machines is to allow the realization of such trenches of significant depth that meet stringent verticality criteria.
  • the entire trench is obtained by successive digging of juxtaposed panels.
  • the cutters are constituted by a relatively large frame which provides mechanical guidance of the excavating machine as the trench is made. At the lower end of the frame is fixed a cutting head.
  • the cutting head is usually constituted by two milling motors usually carrying each a pair of drums on which are mounted the milling tools. Each pair of drums rotates about a common axis, the two axes of the mill motors being parallel and horizontal in use.
  • the milling drums are rotated from hydraulic motors.
  • the hydraulic motor is placed on the frame above the cutting head. It transmits power through a shaft of small diameter substantially vertical which passes through the thickness of the plate forming the bearing of the milling motor.
  • the vertical shaft attacks a pair of bevel gears that return motion in the horizontal axis.
  • An epicyclic reduction system reduces the rotation speed and multiplies the torque to effectively drive the mill drums.
  • the hydraulic motors are placed at the lower part of the frame of the machine above the cutting head and the power is transmitted to the milling drum by a transmission chain.
  • JP 2006 063666 shows the features of the preamble of claim 1.
  • the first two types of excavating machine have the major disadvantage of having hydraulic motors above the cutting head and therefore to present a more complex and more expensive assembly of these engines. In particular, it is impossible to make rapid exchanges of the cutting head.
  • the thickness of the cutting head is conditioned by the width of the trench to be produced which can vary from 500 to 1500 mm.
  • the present invention relates to an excavation machine of reduced width typically between 500 and 800 mm.
  • An object of the present invention is to provide a cutting head for a milling type excavating machine which offers better performance in terms of torque and / or speed than prior machines in an available volume determined by the diameter of the drums of the milling machine.
  • strawberry which is in general of the order of 1.4 m and the thickness of the cutting head preferably between 500 mm and 800 mm.
  • the cutting head for excavating machine comprises the features of claim 1. It is understood that, thanks to the offset between the mounting assembly of the hydraulic motor and the end portion of the mounting structure which contains the supply lines of the hydraulic motor, on the one hand the hydraulic motor is accessible at one end. of the mill motor and, secondly, the supply of the hydraulic motor is laterally favorable.
  • the position of the bearings minimizes the size of the mill motor in the direction of the hydraulic motor shaft.
  • the cutter motor further comprises two rims for mounting the cutter drums, each rim being kinematically connected to one end of said shaft and two bearing assemblies mounted respectively on the outer face of said mounting assembly and on the outer face. of the end portion of the mounting structure.
  • the mill motor further comprises a control system for varying the displacement of the hydraulic motor, driven by the fluid conveyed by one of said pipes and one of said pipes.
  • FIG. 1A and 1B the whole of the strawberry-type excavating machine has been represented in a simplified manner.
  • This machine is constituted by a frame 12 of relatively large length and of substantially rectangular horizontal section.
  • the upper end 12a of the frame is equipped with pulleys 14 on which passes a muffle levitation of the cutter 12.
  • On the lower end 12b of the frame 12 are attached two identical milling motors 16 and 18 forming the cutting head.
  • Each cutter motor 16 or 18 essentially consists of a fixing plate 20 on which are mounted two milling drums 22 and 24 symmetrical with respect to the median plane of the fixing plate 20.
  • the invention relates to the rotary drive of milling drums 22, 24 of the milling motors 16 and 18.
  • the suction nozzle 17 for the cut soil debris and the suction pump 19 thereof have also been included.
  • the mill motor 16 comprises a mounting structure 26 which is integral with the fixing plate 20 and engaged in a preferably circular orifice 28 of axis XX 'formed in this plate.
  • the mounting structure 26 includes an end portion 29 for receiving the hydraulic motor supply lines, as will be explained later, and a mounting assembly 30 for receiving the hydraulic motor 32.
  • the hydraulic motor 32 comprises a stator 32a and a rotor 32b.
  • the end portion 29 and the assembly assembly 30 are offset from the median plane along the axis XX 'of rotation of the drums of strawberry.
  • the mounting structure 26 is integral with the fixing plate 20 and engaged in the orifice, preferably circular 28 thereof.
  • the hydraulic motor 32 is entirely disposed on the same side of the median plane of the fixing plate 20. In other cases, the hydraulic motor 32 may be partly on the other side of the median plane.
  • the assembly assembly 30 is constituted by a cylindrical shell 36, which extends on one side of the end portion 28 and which defines a cylindrical cavity 38 intended to receive the hydraulic motor 32, the latter being fixed by its stator 32a on the ferrule.
  • This cavity opens at one end of the cutter motor thus making the hydraulic motor 32 easily accessible.
  • the hydraulic motor 32 rotates a shaft 40 which extends in the direction XX 'over the entire width of the mill motor.
  • the milling drums are rotated by the shaft 40 by means of two rims 42 and 44 respectively integral ends 40a and 40b of the shaft 40 of the hydraulic motor.
  • the milling drums are mounted on the outer face of the rims 42 and 44.
  • the bearings 46 and 48 are interposed between the outer faces 29a and 36a of the end portion 29 and the shell 36, on the one hand, and the rims 42 and 44 on the other hand. These bearings 46 and 48 must, on the one hand, take up the radial forces resulting from the action of the milling cutters on the ground, and on the other hand take up the axial forces resulting from the feeding mode of the hydraulic motor 32, as will explain later. In addition, these bearings must be able to take axial forces due to axial thrust applied to the milling drum by possible inhomogeneities of the soil in which the drilling is performed.
  • the bearings 46 are mounted at least in part to the right of the hydraulic motor 32. Thus, it is possible to obtain a high compactness of the mill motor in the direction of its axis.
  • the stator of the hydraulic motor 32 is fixed directly on the assembly assembly 30, that is to say on the cylindrical shell 36.
  • the supply of the hydraulic motor 32 and its annexes is carried out firstly by pipes 50 formed in the thickness of the fixing plate 20, and secondly by pipes 52 arranged in the end portion 29 of the mounting structure 26, the figure 2 showing these pipes in a symbolic way.
  • each pipe 50 is connected to a first end of a pipe 52, the second end of these pipes being connected to a distribution window 54 to ensure a sliding and rotating connection between these pipes and the rotor 32b of the motor hydraulic 32.
  • the figure 3 shows in more detail an embodiment of the milling motor object of the invention.
  • Line 50a corresponds to the high pressure supply of the hydraulic motor
  • line 50e corresponds to the low pressure oil outlet of the hydraulic motor
  • the lines 50b and 50c respectively correspond to the draining of the internal leaks of the hydraulic motor 32 and to the balancing of the internal pressure of the bur motor.
  • Sealing pressure balancing systems are well known per se. It is not necessary to describe them here. Their function is to prevent the penetration of drilling mud into the mill motor itself.
  • the pipes 50a to 50e formed in the thickness of the fixing plate 20 are lined internally with a liner 56 having properties adapted to the liquids circulating in these pipes and at their pressure.
  • This lining where it exists, also aims to improve the seal.
  • the fixing plate 20 can have a reduced thickness, typically of the order of 50 to 60 mm.
  • the fixing plate comprises a circular orifice 28 in which the mounting structure 26 is mounted. Indeed, in the thickness of the fixing plate 20, only the straight lines 50 which comprise preferably a liner 56. The bent portions are in fact part of the pipes 52 formed in the end portion 29 of the mounting structure. In the end portion 29, there is ample room to spare the pipes 52 and the supply windows of the hydraulic motor.
  • the fact of being able to minimize the thickness of the fixing plate meets another objective. Indeed, the strawberries can not act in the corresponding zone except to make expensive special arrangements.
  • the milling motor is equipped with a control for varying the displacement of the hydraulic motor, this system not being shown in the figures.
  • These displacement control systems are well known in themselves.
  • Line 50d and line 52d serve to convey the control liquid of the displacement change system.
  • the hydraulic motor 32 has two possible cylinders.
  • This arrangement makes it possible to adapt the torque delivered by the hydraulic motor 32 and transmitted to the milling drums to the characteristics of the soil in which the excavating machine is used.

Description

La présente invention a pour objet une tête de coupe pour une machine d'excavation habituellement désignée sous le nom de fraise.The present invention relates to a cutting head for an excavating machine usually referred to as a milling cutter.

Les machines d'excavation du type fraise sont utilisées le plus souvent pour réaliser dans le sol des tranchées de profondeur relativement importante, jusqu'à 100 mètres, et de largeur relativement réduite par rapport à ladite profondeur, la largeur étant typiquement comprise entre 500 mm et 1 500 mm. Un des intérêts de ces machines est de permettre la réalisation de telles tranchées de profondeur importante qui respectent des critères de verticalité rigoureux. L'ensemble de la tranchée est obtenu par creusement successif de panneaux juxtaposés.Cutting-type excavating machines are most often used to make trenches of relatively large depth, up to 100 meters, in the soil, and of relatively small width relative to said depth, the width typically being between 500 mm. and 1500 mm. One of the interests of these machines is to allow the realization of such trenches of significant depth that meet stringent verticality criteria. The entire trench is obtained by successive digging of juxtaposed panels.

D'une manière générale, les fraises sont constituées par un châssis de hauteur relativement importante qui assure un guidage mécanique de la machine d'excavation au fur et à mesure de la réalisation de la tranchée. A l'extrémité inférieure du châssis est fixée une tête de coupe. Ces machines sont en soi bien connues et il est donc suffisant d'indiquer que la tête de coupe est constituée le plus souvent par deux moteurs de fraise portant le plus souvent chacun une paire de tambours sur lesquels sont montés les outils de fraisage. Chaque paire de tambours tourne autour d'un axe commun, les deux axes des moteurs de fraise étant parallèles et horizontaux en cours d'utilisation. Les tambours de fraise sont entraînés en rotation à partir de moteurs hydrauliques.In general, the cutters are constituted by a relatively large frame which provides mechanical guidance of the excavating machine as the trench is made. At the lower end of the frame is fixed a cutting head. These machines are in themselves well known and it is therefore sufficient to indicate that the cutting head is usually constituted by two milling motors usually carrying each a pair of drums on which are mounted the milling tools. Each pair of drums rotates about a common axis, the two axes of the mill motors being parallel and horizontal in use. The milling drums are rotated from hydraulic motors.

Différents types de montage sont possibles. Dans la solution adoptée notamment par la société Bauer, le moteur hydraulique est placé sur le châssis au-dessus de la tête de coupe. Il transmet la puissance par l'intermédiaire d'un arbre de petit diamètre sensiblement vertical qui passe dans l'épaisseur de la plaque formant le palier du moteur de fraise. L'arbre vertical attaque un couple de pignons coniques qui renvoie le mouvement dans l'axe horizontal. Un système de réducteurs épicycloïdaux réduit la vitesse de rotation et multiplie le couple pour entraîner effectivement les tambours de fraise.Different types of mounting are possible. In the solution adopted in particular by Bauer, the hydraulic motor is placed on the frame above the cutting head. It transmits power through a shaft of small diameter substantially vertical which passes through the thickness of the plate forming the bearing of the milling motor. The vertical shaft attacks a pair of bevel gears that return motion in the horizontal axis. An epicyclic reduction system reduces the rotation speed and multiplies the torque to effectively drive the mill drums.

Dans une autre solution proposée notamment par la société Casagrande, les moteurs hydrauliques sont placés à la partie inférieure du châssis de la machine au-dessus de la tête de coupe et la puissance est transmise au tambour de fraise par une chaîne de transmission.In another solution proposed in particular by Casagrande, the hydraulic motors are placed at the lower part of the frame of the machine above the cutting head and the power is transmitted to the milling drum by a transmission chain.

On connaît également par le brevet européen EP 0 262 050 au nom de la société Soletanche, un mode d'entraînement des tambours de fraise dans lequel le moteur hydraulique unique est monté à l'intérieur des tambours de fraise et relié à ceux-ci soit par un étage de réduction par pignons, soit par une transmission directe. La façon dont la puissance hydraulique est appliquée au moteur n'est pas décrite. On connait également les documents FR 2 726 018 et JP 2006 063666 . JP 2006 063666 montre les caractéristiques du préambule de la revendication 1. Les deux premiers types de machine d'excavation présentent l'inconvénient majeur d'avoir des moteurs hydrauliques au-dessus de la tête de coupe et donc de présenter un montage plus complexe et plus coûteux de ces moteurs. En particulier, il est impossible de procéder à des échanges rapides de la tête de coupe.Also known by the European patent EP 0 262 050 on behalf of the company Soletanche, a training mode for drums milling cutter in which the single hydraulic motor is mounted inside the milling drums and connected thereto either by a gear reduction stage or by a direct transmission. The way hydraulic power is applied to the engine is not described. We also know the documents FR 2,726,018 and JP 2006 063666 . JP 2006 063666 shows the features of the preamble of claim 1. The first two types of excavating machine have the major disadvantage of having hydraulic motors above the cutting head and therefore to present a more complex and more expensive assembly of these engines. In particular, it is impossible to make rapid exchanges of the cutting head.

En outre, les éléments de la chaîne cinématique de transmission des deux premiers types de fraise (engrenage, réducteur, chaîne) introduisent des pertes de rendement importantes de l'ordre de 15 % dont est exempte la solution décrite dans le brevet européen de la société Soletanche.In addition, the elements of the transmission kinematic chain of the first two types of milling cutter (gear, gearbox, chain) introduce significant yield losses of the order of 15% which is exempt from the solution described in the European patent of the company. Soletanche.

Il faut ajouter que selon la nature du travail et des terrains traversés, il est intéressant de pouvoir faire varier les paramètres de vitesse de rotation et de couples de tambours de fraise.It should be added that depending on the nature of the work and the terrain crossed, it is interesting to be able to vary the rotational speed parameters and pairs of milling drums.

L'épaisseur de la tête de coupe est conditionnée par la largeur de la tranchée à réaliser qui peut varier de 500 à 1 500 mm. La présente invention concerne une machine d'excavation de largeur réduite typiquement comprise entre 500 et 800 mm.The thickness of the cutting head is conditioned by the width of the trench to be produced which can vary from 500 to 1500 mm. The present invention relates to an excavation machine of reduced width typically between 500 and 800 mm.

On comprend que, dans le cas d'une telle épaisseur réduite, la réalisation des moyens d'entraînement des tambours peut soulever des problèmes particuliersIt will be understood that, in the case of such a reduced thickness, the realization of the means for driving the drums may raise particular problems.

Un objet de la présente invention est de fournir une tête de coupe pour machine d'excavation du type fraise qui offre de meilleures performances en termes de couple et/ou de vitesse que les machines antérieures dans un volume disponible déterminé par le diamètre des tambours de fraise qui est en général de l'ordre de 1,4 m et l'épaisseur de la tête de coupe comprise de préférence entre 500 mm et 800 mm.An object of the present invention is to provide a cutting head for a milling type excavating machine which offers better performance in terms of torque and / or speed than prior machines in an available volume determined by the diameter of the drums of the milling machine. strawberry which is in general of the order of 1.4 m and the thickness of the cutting head preferably between 500 mm and 800 mm.

Pour atteindre ce but selon l'invention, la tête de coupe pour machine d'excavation comprend les caractéristiques de la revendication 1. On comprend que, grâce au décalage entre l'ensemble de montage du moteur hydraulique et la partie d'extrémité de la structure de montage qui contient les canalisations d'alimentation du moteur hydraulique, d'une part le moteur hydraulique est accessible à une extrémité du moteur de fraise et, d'autre part, l'alimentation du moteur hydraulique se présente latéralement de façon favorable.To achieve this object according to the invention, the cutting head for excavating machine comprises the features of claim 1. It is understood that, thanks to the offset between the mounting assembly of the hydraulic motor and the end portion of the mounting structure which contains the supply lines of the hydraulic motor, on the one hand the hydraulic motor is accessible at one end. of the mill motor and, secondly, the supply of the hydraulic motor is laterally favorable.

De plus, la position des paliers permet de minimiser la dimension du moteur de fraise selon la direction de l'arbre du moteur hydraulique.In addition, the position of the bearings minimizes the size of the mill motor in the direction of the hydraulic motor shaft.

De préférence, le moteur de fraise comprend en outre deux jantes pour le montage des tambours de fraises, chaque jante étant raccordée cinématiquement à une extrémité dudit arbre et deux ensembles de paliers montés respectivement sur la face externe dudit ensemble de montage et sur la face externe de la partie d'extrémité de la structure de montage.Preferably, the cutter motor further comprises two rims for mounting the cutter drums, each rim being kinematically connected to one end of said shaft and two bearing assemblies mounted respectively on the outer face of said mounting assembly and on the outer face. of the end portion of the mounting structure.

De préférence encore, le moteur de fraise comprend en outre un système de commande de variation de la cylindrée du moteur hydraulique, piloté par le fluide véhiculé par une desdites conduites et une desdites canalisations.More preferably, the mill motor further comprises a control system for varying the displacement of the hydraulic motor, driven by the fluid conveyed by one of said pipes and one of said pipes.

D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description qui suit d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif. La description se réfère aux figures annexées, sur lesquelles :

  • les figures 1A et 1B montrent l'ensemble d'une machine d'excavation du type fraise en vue en élévation et en vue de côté ;
  • la figure 2 est une coupe verticale d'un moteur de fraise pour en exposer les éléments essentiels ;
  • la figure 3 est une vue en section selon la ligne A-A de la figure 2.
Other features and advantages of the invention will appear better on reading the following description of an embodiment of the invention given by way of non-limiting example. The description refers to the appended figures, in which:
  • the Figures 1A and 1B show the whole of a strawberry-type excavation machine in elevation and side view;
  • the figure 2 is a vertical section of a strawberry motor to expose the essential elements;
  • the figure 3 is a sectional view along line AA of the figure 2 .

Sur les figures 1A et 1B, on a représenté de façon simplifiée l'ensemble de la machine d'excavation du type fraise. Cette machine est constituée par un châssis 12 de longueur relativement importante et de section horizontale sensiblement rectangulaire. L'extrémité supérieure 12a du châssis est équipée de poulies 14 sur lesquelles passe un moufle de sustentation de la fraise 12. Sur l'extrémité inférieure 12b du châssis 12 sont fixés deux moteurs de fraise identiques 16 et 18 formant la tête de coupe. Chaque moteur de fraise 16 ou 18 est essentiellement constitué par une plaque de fixation 20 sur laquelle sont montés deux tambours de fraise 22 et 24 symétriques par rapport au plan médian de la plaque de fixation 20. L'invention concerne l'entraînement en rotation des tambours de fraise 22, 24 des moteurs de fraise 16 et 18.On the Figures 1A and 1B the whole of the strawberry-type excavating machine has been represented in a simplified manner. This machine is constituted by a frame 12 of relatively large length and of substantially rectangular horizontal section. The upper end 12a of the frame is equipped with pulleys 14 on which passes a muffle levitation of the cutter 12. On the lower end 12b of the frame 12 are attached two identical milling motors 16 and 18 forming the cutting head. Each cutter motor 16 or 18 essentially consists of a fixing plate 20 on which are mounted two milling drums 22 and 24 symmetrical with respect to the median plane of the fixing plate 20. The invention relates to the rotary drive of milling drums 22, 24 of the milling motors 16 and 18.

On a également fait figurer la buse 17 d'aspiration des débris de sol découpés et la pompe 19 d'aspiration de ceux-ci.The suction nozzle 17 for the cut soil debris and the suction pump 19 thereof have also been included.

En se référant maintenant à la figure 2, on va décrire l'organisation générale de l'entraînement en rotation d'une paire de tambours de fraise 22, 24 constituant un moteur de fraise.Referring now to the figure 2 the general organization of the rotational drive of a pair of milling drums 22, 24 constituting a mill motor will be described.

Le moteur de fraise 16 comprend une structure de montage 26 qui est solidaire de la plaque de fixation 20 et engagée dans un orifice de préférence circulaire 28 d'axe XX' ménagé dans cette plaque. La structure de montage 26 comprend une partie d'extrémité 29 destinée à recevoir les canalisations d'alimentation du moteur hydraulique, comme on l'expliquera ultérieurement, et un ensemble de montage 30 destiné à recevoir le moteur hydraulique 32. Le moteur hydraulique 32 comprend un stator 32a et un rotor 32b. La partie d'extrémité 29 et l'ensemble de montage 30 sont décalés du plan médian selon l'axe XX' de rotation des tambours de fraise. La structure de montage 26 est solidaire de la plaque de fixation 20 et engagée dans l'orifice, de préférence circulaire 28 de celle-ci.The mill motor 16 comprises a mounting structure 26 which is integral with the fixing plate 20 and engaged in a preferably circular orifice 28 of axis XX 'formed in this plate. The mounting structure 26 includes an end portion 29 for receiving the hydraulic motor supply lines, as will be explained later, and a mounting assembly 30 for receiving the hydraulic motor 32. The hydraulic motor 32 comprises a stator 32a and a rotor 32b. The end portion 29 and the assembly assembly 30 are offset from the median plane along the axis XX 'of rotation of the drums of strawberry. The mounting structure 26 is integral with the fixing plate 20 and engaged in the orifice, preferably circular 28 thereof.

Dans l'exemple représenté sur la figure 2, le moteur hydraulique 32 est entièrement disposé d'un même côté du plan médian de la plaque de fixation 20. Dans d'autres cas, le moteur hydraulique 32 pourrait se trouver en partie de l'autre côté du plan médian.In the example shown on the figure 2 , the hydraulic motor 32 is entirely disposed on the same side of the median plane of the fixing plate 20. In other cases, the hydraulic motor 32 may be partly on the other side of the median plane.

De préférence, l'ensemble de montage 30 est constitué par une virole cylindrique 36, qui s'étend d'un côté de la partie d'extrémité 28 et qui définit une cavité cylindrique 38 destinée à recevoir le moteur hydraulique 32, celui-ci étant fixé par son stator 32a sur la virole. Cette cavité débouche à une extrémité du moteur de fraise rendant ainsi le moteur hydraulique 32 facilement accessible.Preferably, the assembly assembly 30 is constituted by a cylindrical shell 36, which extends on one side of the end portion 28 and which defines a cylindrical cavity 38 intended to receive the hydraulic motor 32, the latter being fixed by its stator 32a on the ferrule. This cavity opens at one end of the cutter motor thus making the hydraulic motor 32 easily accessible.

Le moteur hydraulique 32 entraîne en rotation un arbre 40 qui s'étend selon la direction XX' sur toute la largeur du moteur de fraise.The hydraulic motor 32 rotates a shaft 40 which extends in the direction XX 'over the entire width of the mill motor.

Les tambours de fraise sont entraînés en rotation par l'arbre 40 par l'intermédiaire de deux jantes 42 et 44 solidaires respectivement des extrémités 40a et 40b de l'arbre 40 du moteur hydraulique. Les tambours de fraise sont montés sur la face externe des jantes 42 et 44.The milling drums are rotated by the shaft 40 by means of two rims 42 and 44 respectively integral ends 40a and 40b of the shaft 40 of the hydraulic motor. The milling drums are mounted on the outer face of the rims 42 and 44.

Les paliers 46 et 48 sont interposés entre les faces externes 29a et 36a de la partie d'extrémité 29 et de la virole 36, d'une part, et les jantes 42 et 44 d'autre part. Ces paliers 46 et 48 doivent, d'une part, reprendre les efforts radiaux résultant de l'action des fraises sur le sol, et d'autre part reprendre les efforts axiaux résultant du mode d'alimentation du moteur hydraulique 32, comme on l'expliquera ultérieurement. En outre, ces paliers doivent pouvoir reprendre des efforts axiaux dus aux poussées axiales appliquées au tambour de fraise par d'éventuelles inhomogénéités du sol dans lequel le forage est réalisé.The bearings 46 and 48 are interposed between the outer faces 29a and 36a of the end portion 29 and the shell 36, on the one hand, and the rims 42 and 44 on the other hand. These bearings 46 and 48 must, on the one hand, take up the radial forces resulting from the action of the milling cutters on the ground, and on the other hand take up the axial forces resulting from the feeding mode of the hydraulic motor 32, as will explain later. In addition, these bearings must be able to take axial forces due to axial thrust applied to the milling drum by possible inhomogeneities of the soil in which the drilling is performed.

Les paliers 46 sont montés au moins en partie au droit du moteur hydraulique 32. Ainsi, il est possible d'obtenir une grande compacité du moteur de fraise selon la direction de son axe. En outre, le stator du moteur hydraulique 32 est fixé directement sur l'ensemble de montage 30, c'est-à-dire sur la virole cylindrique 36.The bearings 46 are mounted at least in part to the right of the hydraulic motor 32. Thus, it is possible to obtain a high compactness of the mill motor in the direction of its axis. In addition, the stator of the hydraulic motor 32 is fixed directly on the assembly assembly 30, that is to say on the cylindrical shell 36.

L'alimentation du moteur hydraulique 32 et de ses annexes est réalisée d'une part par des conduites 50 ménagées dans l'épaisseur de la plaque de fixation 20, et d'autre part par des canalisations 52 disposées dans la partie d'extrémité 29 de la structure de montage 26, la figure 2 montrant ces canalisations de façon symbolique.The supply of the hydraulic motor 32 and its annexes is carried out firstly by pipes 50 formed in the thickness of the fixing plate 20, and secondly by pipes 52 arranged in the end portion 29 of the mounting structure 26, the figure 2 showing these pipes in a symbolic way.

L'extrémité interne de chaque conduite 50 est raccordée à une première extrémité d'une canalisation 52, la deuxième extrémité de ces canalisations étant raccordée à une glace de distribution 54 pour assurer une connexion glissante et tournante entre ces canalisations et le rotor 32b du moteur hydraulique 32.The inner end of each pipe 50 is connected to a first end of a pipe 52, the second end of these pipes being connected to a distribution window 54 to ensure a sliding and rotating connection between these pipes and the rotor 32b of the motor hydraulic 32.

On comprend que, au niveau des glaces 54 de distribution, l'action du liquide sous pression arrivant par certaines canalisations 52, notamment la canalisation d'alimentation sous haute pression du moteur hydraulique, exerce sur la face d'extrémité 32c du rotor 32b une poussée axiale importante qu'il y a lieu de reprendre par les paliers 46 et 48.It will be understood that, at the level of the distribution windows 54, the action of the pressurized liquid arriving via certain lines 52, in particular the high-pressure supply line of the hydraulic motor, exerts on the end face 32c of the rotor 32b a significant axial thrust that should be taken again by the bearings 46 and 48.

La figure 3 montre plus en détails un exemple de réalisation du moteur de fraise objet de l'invention.The figure 3 shows in more detail an embodiment of the milling motor object of the invention.

Sur la figure 3, on a représenté les conduites 50a, 50b, 50c, 50d et 50e qui sont ménagées dans l'épaisseur de la plaque de fixation 20, ainsi que les canalisations 52a, 52b, 52c, 52d et 52e qui leur sont raccordées.On the figure 3 , there is shown the pipes 50a, 50b, 50c, 50d and 50e which are formed in the thickness of the fixing plate 20, as well as the pipes 52a, 52b, 52c, 52d and 52e connected to them.

La conduite 50a correspond à l'alimentation haute pression du moteur hydraulique, la conduite 50e correspond à la sortie d'huile basse pression du moteur hydraulique. Les conduites 50b et 50c correspondent respectivement au drainage des fuites internes du moteur hydraulique 32 et à l'équilibrage de la pression interne du moteur de fraise.Line 50a corresponds to the high pressure supply of the hydraulic motor, line 50e corresponds to the low pressure oil outlet of the hydraulic motor. The lines 50b and 50c respectively correspond to the draining of the internal leaks of the hydraulic motor 32 and to the balancing of the internal pressure of the bur motor.

Les systèmes d'équilibrage par pression de joints d'étanchéité sont bien connus en eux-mêmes. Il n'est donc pas nécessaire de les décrire ici. Leur fonction est d'éviter la pénétration de la boue de forage dans le moteur de fraise lui-même.Sealing pressure balancing systems are well known per se. It is not necessary to describe them here. Their function is to prevent the penetration of drilling mud into the mill motor itself.

De préférence, les conduites 50a à 50e ménagées dans l'épaisseur de la plaque de fixation 20 sont revêtues intérieurement d'un chemisage 56 ayant des propriétés adaptées aux liquides qui circulent dans ces conduites et à leur pression. Ce chemisage, lorsqu'il existe, a également pour but d'améliorer l'étanchéité.Preferably, the pipes 50a to 50e formed in the thickness of the fixing plate 20 are lined internally with a liner 56 having properties adapted to the liquids circulating in these pipes and at their pressure. This lining, where it exists, also aims to improve the seal.

Une autre caractéristique qui permet également d'augmenter la compacité selon l'axe du moteur hydraulique consiste dans le fait que la plaque de fixation 20 peut avoir une épaisseur réduite typiquement de l'ordre de 50 à 60 mm.Another feature which also makes it possible to increase the compactness along the axis of the hydraulic motor consists in the fact that the fixing plate 20 can have a reduced thickness, typically of the order of 50 to 60 mm.

Cela est obtenu notamment par le fait que la plaque de fixation comporte un orifice circulaire 28 dans lequel est montée la structure de montage 26. En effet, dans l'épaisseur de la plaque de fixation 20, on trouve seulement les conduites rectilignes 50 qui comportent de préférence un chemisage 56. Les parties coudées font en fait partie des canalisations 52 ménagées dans la partie d'extrémité 29 de la structure de montage. Dans la partie d'extrémité 29, on dispose de toute la place nécessaire pour ménager les canalisations 52 et les glaces d'alimentation du moteur hydraulique.This is achieved in particular by the fact that the fixing plate comprises a circular orifice 28 in which the mounting structure 26 is mounted. Indeed, in the thickness of the fixing plate 20, only the straight lines 50 which comprise preferably a liner 56. The bent portions are in fact part of the pipes 52 formed in the end portion 29 of the mounting structure. In the end portion 29, there is ample room to spare the pipes 52 and the supply windows of the hydraulic motor.

En outre, le fait de pouvoir minimiser l'épaisseur de la plaque de fixation répond à un autre objectif. En effet, les fraises ne peuvent agir dans la zone correspondante sauf à prendre des dispositions particulières onéreuses.In addition, the fact of being able to minimize the thickness of the fixing plate meets another objective. Indeed, the strawberries can not act in the corresponding zone except to make expensive special arrangements.

De préférence également, le moteur de fraise est équipé d'une commande de variation de la cylindrée du moteur hydraulique, ce système n'étant pas représenté sur les figures. Ces systèmes de commande de cylindrée sont bien connus en eux-mêmes. La conduite 50d et la canalisation 52d servent à acheminer le liquide de commande du système de changement de cylindrée. En pratique, le moteur hydraulique 32 présente deux cylindres possibles.Also preferably, the milling motor is equipped with a control for varying the displacement of the hydraulic motor, this system not being shown in the figures. These displacement control systems are well known in themselves. Line 50d and line 52d serve to convey the control liquid of the displacement change system. In practice, the hydraulic motor 32 has two possible cylinders.

Cette disposition permet d'adapter le couple délivré par le moteur hydraulique 32 et transmis aux tambours de fraise aux caractéristiques du sol dans lequel la machine d'excavation est utilisée.This arrangement makes it possible to adapt the torque delivered by the hydraulic motor 32 and transmitted to the milling drums to the characteristics of the soil in which the excavating machine is used.

Claims (6)

  1. A cutter head for an excavator machine having at least one cutter motor, each cutter motor comprising:
    • a fastener plate (20);
    • a mounting structure (26) comprising an end portion (29) and a mounting assembly (30);
    • a single hydraulic motor (32) mounted in said mounting assembly (30) with an outlet shaft presenting two ends (40a, 40b), said single hydraulic motor (32) and the end portion (29) of the mounting structure (26) being offset in a direction orthogonal to said fastener plate (20) ;
    • a plurality of conduits (50) formed in the thickness of the fastener plate (20);
    • two rims (42, 44) for mounting the cutter drum (22, 24), each rim (42, 44) being drivingly connected to one end (40a, 40b) of said outlet shaft (40); and
    • two sets of bearings (46, 48) mounted respectively on the outside face of said mounting assembly (30) and on the outside face of the end portion (29) of the mounting structure (26) ;
    characterized in that said mounting assembly (30) comprises a cylindrical bushing (36) defining a cylindrical cavity (38) for receiving said single hydraulic motor (32), the single hydraulic motor (32) being mounted by means of its stator(32a) to said bushing (36),
    in that a plurality of ducts (52) are formed in said end portion (29) of the mounting structure (26) to connect the single hydraulic motor (32) to said conduits (50), and
    in that the bearing (46) mounted on the mounting assembly (30) is disposed at least in part in register with the hydraulic motor (32).
  2. A cutter head according to claim 1, characterized in that said sets of bearings (46, 48) are also suitable for taking up forces in the axial direction of the cutter motor shaft.
  3. A cutter head according to any one of claims 1 or 2, characterized in that the hydraulic motor (32) has a variable cylinder capacity, and in that said cutter motor further includes a system for controlling variation in the cylinder capacity of the hydraulic motor (32) under the control of fluid conveyed by one of said conduits and one of said ducts (50).
  4. A cutter head according to any one of claims 1 to 3, characterized in that the cutter motor further includes a system for balancing the pressure of sealing gaskets of the cutter motor, said balancing system being fed by one of said conduits (50) and one of said ducts (52).
  5. A cutter head according to any one of claims 1 to 4, characterized in that the bearing (46) mounted on the mounting assembly (30) is mounted on the outside face of said cylindrical bushing (36).
  6. A cutter head according to any one of claims 1 to 5, characterized in that said plate presents an orifice (28) in which said mounting structure (26) is engaged and fastened.
EP07112941.5A 2006-07-28 2007-07-23 Cutting head for a digging machine Active EP1882782B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0653171A FR2904339B1 (en) 2006-07-28 2006-07-28 CUTTING HEAD FOR AN EXCAVATION MACHINE

Publications (2)

Publication Number Publication Date
EP1882782A1 EP1882782A1 (en) 2008-01-30
EP1882782B1 true EP1882782B1 (en) 2018-03-21

Family

ID=37733701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07112941.5A Active EP1882782B1 (en) 2006-07-28 2007-07-23 Cutting head for a digging machine

Country Status (6)

Country Link
US (1) US7591514B2 (en)
EP (1) EP1882782B1 (en)
JP (1) JP5204434B2 (en)
KR (1) KR101502537B1 (en)
CA (1) CA2594051C (en)
FR (1) FR2904339B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20070241A1 (en) * 2007-04-05 2008-10-06 Soilmec Spa PUMP FOR HYDROFRESA.
EP3556942B1 (en) * 2018-04-18 2020-04-29 BAUER Maschinen GmbH Cutter for making a diaphragma wall and method of making such wall
CN112195997A (en) * 2020-09-28 2021-01-08 广州市鼎隆机电安装有限公司 Buried electromechanical equipment installation device

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Publication number Priority date Publication date Assignee Title
JP2006063666A (en) * 2004-08-27 2006-03-09 Tone Boring Co Ltd Horizontal multiple axes excavator

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US3290096A (en) * 1963-12-20 1966-12-06 Westinghouse Air Brake Co Motorized multiple drums for mining machine
DE2211280C2 (en) * 1972-03-09 1981-05-21 Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter Cutting tool for a mining machine
US3868980A (en) * 1972-03-21 1975-03-04 Hans Und Heinrich Blum Ohg Method and apparatus for comminuting tree stumps
DE3612020A1 (en) * 1986-04-10 1987-10-15 Hochtief Ag Hoch Tiefbauten DEVICE FOR INSERTING AN ESSENTIAL VERTICAL FLOOR SLOT
FR2604460B1 (en) * 1986-09-26 1991-05-10 Soletanche DEVICE FOR A MACHINE FOR EXCAVATING TRENCHES IN THE SOIL BY MILLING
FR2618172B1 (en) * 1987-07-16 1989-11-17 Soletanche MILLING MACHINE FOR Digging Trenches In The Ground.
US5158126A (en) * 1991-11-25 1992-10-27 Lang William J Improvements in tree stump grinders and methods of grinding tree stumps
IT1267931B1 (en) * 1994-10-21 1997-02-18 Casagrande Spa CUTTER WITH BEARING SUPPORT
IT1267930B1 (en) * 1994-10-21 1997-02-18 Casagrande Spa CUTTER WITH SOCKET SUPPORT
AUPP764598A0 (en) * 1998-12-11 1999-01-14 R N Cribb Pty Limited Rotary drum cutting head
FR2819834B1 (en) * 2001-01-23 2003-04-04 Cie Du Sol MILLING TOOL FOR CUTTING HARD AND STICKY TERRAIN
ITBO20010632A1 (en) * 2001-10-16 2003-04-16 Simex Engineering S R L HYDRAULIC MILLING MACHINE FOR EXCAVATOR MACHINES
FR2862336B1 (en) * 2003-11-18 2006-03-17 Cie Du Sol DRILLING MACHINE WITH ROTARY TOOLS

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Publication number Priority date Publication date Assignee Title
JP2006063666A (en) * 2004-08-27 2006-03-09 Tone Boring Co Ltd Horizontal multiple axes excavator

Also Published As

Publication number Publication date
CA2594051A1 (en) 2008-01-28
KR20080011127A (en) 2008-01-31
US20080024001A1 (en) 2008-01-31
US7591514B2 (en) 2009-09-22
FR2904339B1 (en) 2011-03-04
JP5204434B2 (en) 2013-06-05
CA2594051C (en) 2014-12-09
EP1882782A1 (en) 2008-01-30
JP2008031837A (en) 2008-02-14
FR2904339A1 (en) 2008-02-01
KR101502537B1 (en) 2015-03-13

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