EP1475481A1 - Tool quick coupler for excavators - Google Patents

Tool quick coupler for excavators Download PDF

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Publication number
EP1475481A1
EP1475481A1 EP04291178A EP04291178A EP1475481A1 EP 1475481 A1 EP1475481 A1 EP 1475481A1 EP 04291178 A EP04291178 A EP 04291178A EP 04291178 A EP04291178 A EP 04291178A EP 1475481 A1 EP1475481 A1 EP 1475481A1
Authority
EP
European Patent Office
Prior art keywords
jaw
support
cams
hooks
linked
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.)
Granted
Application number
EP04291178A
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German (de)
French (fr)
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EP1475481B1 (en
Inventor
René Sieffert
Serge Morin
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MORIN
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MORIN
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Publication date
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Publication of EP1475481A1 publication Critical patent/EP1475481A1/en
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Publication of EP1475481B1 publication Critical patent/EP1475481B1/en
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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
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3622—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a locking element acting on a pin
    • 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
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3672—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where disengagement is effected by a mechanical lever or handle

Definitions

  • the present invention relates to a device allowing the attachment quick of a tool, bucket or the like, at the end of the articulated arm of a excavation machine or hydraulic shovel.
  • Such a device is reliable and efficient but must take into account the large variety of different dimensions and kinematics of the arms articulated hydraulic shovels. This requires the manufacturer to offer a coupler adapted to each model of hydraulic excavator, which requires large parts inventory to be able to fulfill orders in acceptable deadlines.
  • the object of the present invention is to provide a coupler having the same operating principle and same attachment kinematics, but of a different design allowing faster production and more economical.
  • a quick attachment device of a tool to the end of the articulated arm of a hydraulic shovel comprising a part lower, called jaw, intended for taking a bucket, part upper, called support, linked to the shovel arm by means of attachment, the jaw comprising at one of its ends a camshaft in pivot connection with at least one cam, and at its other end two semicircular hooks linked together by at least one transverse bridge, the lower part and the upper part of the device being two pieces separate rigidly linked by fixing means and characterized in that the jaw is obtained from a single piece of casting, comprising two bosses at the end opposite the hooks intended for be crossed by two holes to serve as supports for the camshaft, a transverse bridge being located at the junction of the straight part and the part jaw curve.
  • the device is characterized in that the inner surface of the hooks is a section revolution surface isosceles trapezoid whose small base constitutes the minimum diameter, thus materializing a ramp facilitating cooperation with two surfaces complementary present on a beam located at the top of the bucket
  • the device is characterized in that the support is composed of two identical cut plates which include each two holes for mounting two axes, one connecting with the articulated arm, the other connecting to the links.
  • the bridge close to the junction of the part right of the jaw with the curved part of the hooks, used to hold substantially parallel to each other the ears which constitute the support.
  • the device is characterized in that the jaw and support are connected by a plurality of screws through holes threaded on the surfaces of the jaw in contact with the support, the support being provided with two soles linked two plates by welding, the said soles comprising holes intended for the fixing screws, thus making the support-jaw assembly removable.
  • the device is characterized in that the jaw and its support are linked by welding.
  • the device is characterized in that the locking cams are each linked to one of the two ends of a cylindrical torsion spring wrapped around the support shaft cams, the other end of the spring being linked to said shaft, the action of the springs tending to rotate the cams in the locking direction.
  • the device is characterized in that the locking cams have an open cylindrical shaft housing parallel to the axis of rotation of the cams, allowing by the introduction of a release lever, to counteract the action of the spring (s) and thus unlock the cams.
  • each cam has a hydraulic unlocking device allowing an automatic unlocking of the cams.
  • the device is characterized in that the upper part of the device has two eyelets for the handling of loads by the carrier.
  • the invention relates to a device for quickly attaching a tool now be described in an alternative embodiment where the device is consisting of a jaw (1) and a support (2).
  • the invention is now be described with reference to Figures 1a and 1b, which show the jaw of the coupler.
  • the jaw (1) has a straight part and at one end two semi-circular hooks (11a, 11b) coaxial and axis perpendicular to the longitudinal plane of symmetry of the jaw (1).
  • the hooks have an internal surface (110) which is a isosceles trapezoidal section of revolution, the small base of the trapezoid forming the interior of the surface of revolution.
  • the hooks are rigidly linked together by two bridges transverse (16,17).
  • the first bridge (16) is close to the junction of the right part of the jaw with the curved part of the hooks
  • the second bridge (17) is at the end of the jaw opposite the hooks.
  • Near this end are two coaxial bosses (12a, 12b), intended to be drilled to serve as a support for the camshaft (31).
  • Each boss (12a, 12b) is linked to the corresponding hook (11a, 11b) by a T-shaped section (13a, 13b), ensuring good rigidity of the assembly.
  • Each section (13a, 13b) has on its upper face a face (14a) close to the bridge (17) and a face (14b) close to the bridge (16).
  • These four upper surfaces (14a, 14b) are coplanar and are machined (drilled and threaded) in the case where the jaw and the support are fixed by screws.
  • the jaw has two other surfaces (14c), machined tapped for the bolted support, near the bridge (16) performing the same functions than the other surfaces (14).
  • the bridge (16) makes it possible to stiffen the assembly of the foundry piece, the surfaces (14a, 14b, 14c) serving to fix the support (2).
  • FIGS. 2a and 2b show the device in an alternative embodiment where the connection between the jaw (1) and the support (2) is produced by welding.
  • the constituent elements of the support (2) it is made up two ears (21), which are cut plates, comprising two holes (22) intended for the passage of the axes of the connecting rod (27a) and of the arm articulated (27b).
  • bosses (220) are arranged around the fixing holes (22) so as to ensure satisfactory guide length of the rod axis and the arm axis Speak clearly.
  • the ears (21) also have two eyelets (23) close to the end opposite to that attached to the arm of the shovel, and are intended to hanging of loads during handling work. Both ears (21) are in this case directly welded to the upper face of the jaw, as shown (fig 2b).
  • FIGS. 3a and 3b show the device in an alternative embodiment where the connection between the jaw (1) and the support (2) is produced by screws.
  • This variant of realization offers the advantage of proposing a removable device, and which allows the manufacturer to store the jaws and supports separately for a final assembly which can thus be postponed as needed.
  • the support has substantially the same shape as in the previous variant, and the two ears (21), provided with holes (22) and eyelets (23) are joined by two soles (24) and (25), welded on the two ears (21) and arranged so as to materialize the complementary shape of the assembly upper surfaces (14a, 14b) and (14c) of the jaw (1).
  • the screws fixing (5) tighten the undersides of the soles (24, 25) of the support (2) through a plurality of smooth holes, against the faces (14a, 14b, 14c) of the jaw (1) machined and tapped to receive said screws. Once the screws are in place, the coupler is operational.
  • the coupler is first approached to the bucket (4) by presenting the hooks (11a, 11b) which come to rest on two forms complementary (41a, 41b) present on a beam (40) at the top of the bucket (4) and then rotate the coupler to fold the end opposite the hooks (11a, 11b) in order to support the camshaft (31) in a cradle (43) formed by two recesses made on two ears (42) parallel present at the rear of the bucket (4) At the same time, a shaft (44) comes into contact with the cams (3), thus causing their rotation until the cams (3) can pass under the shaft (44).
  • cams (3) which are each linked to one of the two ends of a wound cylindrical torsion spring (32) around the cam support shaft (31), the other end of the spring being linked to said shaft, the action of the springs tending to rotate the cams in the locking direction; the cams coming to bear on the shaft (44).
  • Dismantling the bucket requires performing these steps in reverse order operations, having previously unlocked the cams (3) by means of a lever introduced into an eyelet (33) present on each cam thus allowing to counteract the force exerted by the cam springs.
  • a hydraulic system may be added to the cams to make automatic unlocking.
  • the support can be fitted with anti-friction rings, four in number and inserted on each side between the connecting rods and the ears (21) and between the articulated arm and ears (21).

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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)
  • Earth Drilling (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

The device has a jaw (1) intended to carry a scoop, and a support (2) coupled to the articulated arm of a hydraulic shovel. The jaw has a camshaft (31) and two semi-circular hooks coupled by two transversal bridges. The jaw is obtained from a monoblock casting with two bearing bosses traversed by two drillings that support the camshaft. The transversal bridges rigidly connect the hooks and the bearing bosses.

Description

La présente invention a pour objet un dispositif permettant l'attache rapide d'un outil, godet ou analogue, à l'extrémité du bras articulé d'une machine d'excavation ou pelle hydraulique.The present invention relates to a device allowing the attachment quick of a tool, bucket or the like, at the end of the articulated arm of a excavation machine or hydraulic shovel.

Il est connu par le brevet n° FR 2 657 596 délivré à Morin Frères un tel dispositif d'attache rapide d'un godet sur une pelle hydraulique. Le dispositif enseigné est un coupleur qui permet la fixation d'un godet sur l'extrémité du bras articulé de l'engin sans l'intervention d'une autre personne que le conducteur de l'engin, et sans que celui-ci ait à quitter sa cabine. Le coupleur est fixé au bras articulé par un axe et aux biellettes présentes sur le bras par un deuxième axe, et comporte deux crochets venant s'arrimer sur deux formes complémentaires présentes sur le godet. Le coupleur comporte un système de verrouillage réalisé par une ou plusieurs cames rotatives à ressort qui viennent serrer un arbre présent sur le godet, un arbre du coupleur servant de support aux cames de verrouillage venant prendre appui sur un berceau présent sur le godet.It is known by patent No. FR 2 657 596 issued to Morin Frères such device for quick attachment of a bucket to a hydraulic shovel. The device taught is a coupler that allows the attachment of a bucket on the end of the articulated arm of the craft without the intervention of anyone other than the operator of the machine, and without having to leave his cabin. The coupler is fixed to the articulated arm by an axis and to the links present on the arm by a second axis, and has two hooks coming to stow on two complementary shapes present on the bucket. The coupler has a locking system produced by one or more rotary cams springs which come to clamp a shaft present on the bucket, a shaft of the coupler supporting the locking cams coming to bear on a cradle on the bucket.

Un tel dispositif est fiable et performant mais doit prendre en compte la grande variété de dimensions et de cinématiques différentes des bras articulés des pelles hydrauliques. Cela exige du fabricant de proposer un coupleur adapté à chaque modèle de pelle hydraulique, ce qui impose des stocks de pièces importants pour pouvoir répondre aux commandes dans des délais acceptables.Such a device is reliable and efficient but must take into account the large variety of different dimensions and kinematics of the arms articulated hydraulic shovels. This requires the manufacturer to offer a coupler adapted to each model of hydraulic excavator, which requires large parts inventory to be able to fulfill orders in acceptable deadlines.

La présente invention a pour objet de proposer un coupleur ayant le même principe de fonctionnement et la même cinématique d'accrochage, mais d'une conception différente permettant une production plus rapide et plus économique.The object of the present invention is to provide a coupler having the same operating principle and same attachment kinematics, but of a different design allowing faster production and more economical.

Cet objectif est atteint par un dispositif d'attache rapide d'un outil à l'extrémité du bras articulé d'une pelle hydraulique, comportant une partie inférieure, appelée mâchoire, destinée à la prise d'un godet, une partie supérieure, appelée support, liée au bras de la pelle par des moyens de fixation, la mâchoire comportant à l'une de ses extrémités un arbre à cames en liaison pivot avec au moins une came, et à son autre extrémité deux crochets semi-circulaires liés entre eux par au moins un pont transversal , la partie inférieure et la partie supérieure du dispositif étant deux pièces distinctes liées rigidement par des moyens de fixation et caractérisé en ce que la mâchoire est obtenue à partir d'une pièce de fonderie monobloc, comportant deux bossages à l'extrémité opposée aux crochets destinés à être traversés par deux perçages pour servir de supports à l'arbre à cames , un pont transversal étant situé à la jonction de la partie droite et de la partie courbe de la mâchoire.This objective is achieved by a quick attachment device of a tool to the end of the articulated arm of a hydraulic shovel, comprising a part lower, called jaw, intended for taking a bucket, part upper, called support, linked to the shovel arm by means of attachment, the jaw comprising at one of its ends a camshaft in pivot connection with at least one cam, and at its other end two semicircular hooks linked together by at least one transverse bridge, the lower part and the upper part of the device being two pieces separate rigidly linked by fixing means and characterized in that the jaw is obtained from a single piece of casting, comprising two bosses at the end opposite the hooks intended for be crossed by two holes to serve as supports for the camshaft, a transverse bridge being located at the junction of the straight part and the part jaw curve.

Selon une autre particularité, le dispositif est caractérisé en ce que la surface intérieure des crochets est une surface de révolution de section trapézoïdale isocèle dont la petite base constitue le diamètre minimum, matérialisant ainsi une rampe facilitant la coopération avec deux surfaces complémentaires présentes sur une poutre située au sommet du godetAccording to another particularity, the device is characterized in that the inner surface of the hooks is a section revolution surface isosceles trapezoid whose small base constitutes the minimum diameter, thus materializing a ramp facilitating cooperation with two surfaces complementary present on a beam located at the top of the bucket

Selon une autre particularité, le dispositif est caractérisé en ce que le support est composé de deux plaques identiques découpées qui comportent chacune deux perçages destinés au montage de deux axes, l'un de liaison avec le bras articulé, l'autre de liaison aux biellettes.According to another particularity, the device is characterized in that the support is composed of two identical cut plates which include each two holes for mounting two axes, one connecting with the articulated arm, the other connecting to the links.

Selon une autre particularité, le pont, proche de la jonction de la partie droite de la mâchoire avec la partie courbe des crochets, sert à maintenir sensiblement parallèles entre elles les oreilles qui constituent le support.According to another particularity, the bridge, close to the junction of the part right of the jaw with the curved part of the hooks, used to hold substantially parallel to each other the ears which constitute the support.

Selon une autre particularité, le dispositif est caractérisé en ce que la mâchoire et le support sont liés par une pluralité de vis grâce à des trous filetés présents sur les surfaces de la mâchoire en contact avec le support, le support étant pourvu de deux semelles liées deux plaques par soudure, lesdites semelles comportant des perçages destinés aux vis de fixation, rendant ainsi l'ensemble support-mâchoire démontable.According to another particularity, the device is characterized in that the jaw and support are connected by a plurality of screws through holes threaded on the surfaces of the jaw in contact with the support, the support being provided with two soles linked two plates by welding, the said soles comprising holes intended for the fixing screws, thus making the support-jaw assembly removable.

Selon une autre particularité, le dispositif est caractérisé en ce que la mâchoire et son support sont liés par soudure.According to another particularity, the device is characterized in that the jaw and its support are linked by welding.

Selon une autre particularité, le dispositif est caractérisé en ce que les cames de verrouillages sont liées chacune à l'une des deux extrémités d'un ressort cylindrique de torsion enroulé autour de l'arbre de support des cames, l'autre extrémité du ressort étant lié audit arbre, l'action des ressorts tendant à faire pivoter les cames dans le sens du verrouillage.According to another particularity, the device is characterized in that the locking cams are each linked to one of the two ends of a cylindrical torsion spring wrapped around the support shaft cams, the other end of the spring being linked to said shaft, the action of the springs tending to rotate the cams in the locking direction.

Selon une autre particularité, le dispositif est caractérisé en ce que les cames de verrouillage comportent un logement cylindrique ouvert d'axe parallèle à l'axe de rotation des cames, permettant par l'introduction d'un levier de déverrouillage, de contrer l'action du (des) ressort(s) et ainsi déverrouiller les cames.According to another particularity, the device is characterized in that the locking cams have an open cylindrical shaft housing parallel to the axis of rotation of the cams, allowing by the introduction of a release lever, to counteract the action of the spring (s) and thus unlock the cams.

Selon une autre particularité, le dispositif est caractérisé en ce que chaque came comporte un dispositif de déverrouillage hydraulique permettant un déverrouillage automatique des cames.According to another particularity, the device is characterized in that each cam has a hydraulic unlocking device allowing an automatic unlocking of the cams.

Selon une autre particularité, le dispositif est caractérisé en ce que la partie supérieure du dispositif comporte deux oeillets destinés à la manutention de charges par l'engin porteur.According to another particularity, the device is characterized in that the upper part of the device has two eyelets for the handling of loads by the carrier.

L'invention, avec ses caractéristiques et avantages, ressortira plus clairement à la lecture de la description faite en référence aux dessins annexés dans lesquels :

  • les figures 1a et 1b montrent une vue en perspective de la mâchoire, respectivement vue de dessus et vue de dessous,
  • les figures 2a et 2b montrent respectivement une vue désassemblée et une vue assemblée du dispositif, dans une variante de réalisation où la mâchoire et le support sont assemblés par soudure,
  • -les figures 3a et 3b montrent respectivement une vue désassemblée et une vue assemblée du dispositif dans une variante de réalisation où la liaison entre la mâchoire et le support est réalisée par vis,
  • la figure 4 montre une vue adaptable d'un godet adaptée au dispositif,
  • les figures 5a, et 5b montrent deux phases de l'attache d'un godet au dispositif, selon le fonctionnement de l'art antérieur.
The invention, with its characteristics and advantages, will emerge more clearly on reading the description made with reference to the appended drawings in which:
  • FIGS. 1a and 1b show a perspective view of the jaw, respectively seen from above and seen from below,
  • FIGS. 2a and 2b respectively show a disassembled view and an assembled view of the device, in an alternative embodiment where the jaw and the support are assembled by welding,
  • FIGS. 3a and 3b respectively show a disassembled view and an assembled view of the device in an alternative embodiment where the connection between the jaw and the support is made by screws,
  • FIG. 4 shows an adaptable view of a bucket adapted to the device,
  • Figures 5a, and 5b show two phases of the attachment of a bucket to the device, according to the operation of the prior art.

L'invention qui concerne un dispositif d'attache rapide d'un outil va maintenant être décrite dans une variante de réalisation où le dispositif est constitué d'une mâchoire (1) et d'un support (2). L'invention va maintenant être décrite en référence aux figures 1a et1b, qui représentent la mâchoire du coupleur. Celle-ci est réalisée à partir d'une pièce de fonderie monobloc présentant un plan de symétrie longitudinal. La mâchoire (1) comporte une partie droite et à une extrémité deux crochets (11a, 11b) semi-circulaires coaxiaux et d'axes perpendiculaire au plan de symétrie longitudinal de la mâchoire (1). Les crochets présentent une surface interne (110) qui est une surface de révolution de section trapézoïdale isocèle, la petite base du trapèze formant l'intérieur de la surface de révolution. Dans cette variante de réalisation, les crochets sont liés rigidement entre eux par deux ponts transversaux (16,17). Le premier pont (16) est proche de la jonction de la partie droite de la mâchoire avec la partie courbe des crochets, le second pont (17) se trouve à l'extrémité de la mâchoire opposée aux crochets. Proche de cette extrémité se trouvent deux bossages coaxiaux (12a, 12b), destinés à être percés pour servir de support à l'arbre à cames (31). Chaque bossage (12a, 12b) est lié au crochet correspondant (11a, 11b) par une section en forme de T (13a, 13b), assurant une bonne rigidité de l'ensemble. Chaque section (13a, 13b) présente sur sa face supérieure une face (14a) proche du pont (17) et une face (14b) proche du pont (16). Ces quatre surfaces supérieures (14a, 14b) sont coplanaires et sont usinées (percées et taraudées) dans le cas où la mâchoire et le support sont fixés par vis. La mâchoire comporte deux autres surfaces (14c), usinées taraudées pour le support boulonné, à proximité du pont (16) remplissant les mêmes fonctions que les autres surfaces (14). Le pont (16) permet de rigidifier l'ensemble de la pièce de fonderie, les surfaces (14a, 14b, 14c) servant de fixation au support (2).The invention relates to a device for quickly attaching a tool now be described in an alternative embodiment where the device is consisting of a jaw (1) and a support (2). The invention is now be described with reference to Figures 1a and 1b, which show the jaw of the coupler. This is made from a one-piece foundry piece having a longitudinal plane of symmetry. The jaw (1) has a straight part and at one end two semi-circular hooks (11a, 11b) coaxial and axis perpendicular to the longitudinal plane of symmetry of the jaw (1). The hooks have an internal surface (110) which is a isosceles trapezoidal section of revolution, the small base of the trapezoid forming the interior of the surface of revolution. In this variant of embodiment, the hooks are rigidly linked together by two bridges transverse (16,17). The first bridge (16) is close to the junction of the right part of the jaw with the curved part of the hooks, the second bridge (17) is at the end of the jaw opposite the hooks. Near this end are two coaxial bosses (12a, 12b), intended to be drilled to serve as a support for the camshaft (31). Each boss (12a, 12b) is linked to the corresponding hook (11a, 11b) by a T-shaped section (13a, 13b), ensuring good rigidity of the assembly. Each section (13a, 13b) has on its upper face a face (14a) close to the bridge (17) and a face (14b) close to the bridge (16). These four upper surfaces (14a, 14b) are coplanar and are machined (drilled and threaded) in the case where the jaw and the support are fixed by screws. The jaw has two other surfaces (14c), machined tapped for the bolted support, near the bridge (16) performing the same functions than the other surfaces (14). The bridge (16) makes it possible to stiffen the assembly of the foundry piece, the surfaces (14a, 14b, 14c) serving to fix the support (2).

L'invention va maintenant être décrite selon les figures 2a et 2b, qui montrent le dispositif dans une variante de réalisation où la liaison entre la mâchoire (1) et le support (2) est réalisée par soudure. Sur les figures 2a et 2b, on peut voir les éléments constitutifs du support (2) : celui-ci est constitué de deux oreilles (21), qui sont des plaques découpées, comportant deux perçages (22) destinés au passage des axes de la bielle (27a) et du bras articulé (27b). Sur chaque face des oreilles (21), des bossages (220) sont disposés autour des trous de fixations (22) de manière à assurer une longueur de guidage satisfaisante de l'axe de la bielle et de l'axe du bras articulé. Les oreilles (21) présentent également deux oeillets (23) proches de l'extrémité opposée à celle fixée au bras de la pelle, et sont destinés à l'accrochage de charges lors de travaux de manutention. Les deux oreilles (21) sont dans ce cas directement soudées sur la face supérieure de la mâchoire, comme représenté (fig 2b).The invention will now be described according to FIGS. 2a and 2b, which show the device in an alternative embodiment where the connection between the jaw (1) and the support (2) is produced by welding. In Figures 2a and 2b, we can see the constituent elements of the support (2): it is made up two ears (21), which are cut plates, comprising two holes (22) intended for the passage of the axes of the connecting rod (27a) and of the arm articulated (27b). On each face of the ears (21), bosses (220) are arranged around the fixing holes (22) so as to ensure satisfactory guide length of the rod axis and the arm axis Speak clearly. The ears (21) also have two eyelets (23) close to the end opposite to that attached to the arm of the shovel, and are intended to hanging of loads during handling work. Both ears (21) are in this case directly welded to the upper face of the jaw, as shown (fig 2b).

L'invention va maintenant être décrite selon les figures 3a et 3b, qui montrent le dispositif dans une variante de réalisation où la liaison entre la mâchoire (1) et le support (2) est réalisé par des vis. Cette variante de réalisation offre l'avantage de proposer un dispositif démontable, et qui permet au fabricant un stockage séparé des mâchoires et des supports pour un montage final qui peut ainsi être différé en fonction des besoins. Le support a sensiblement la même forme que dans la variante précédente, et les deux oreilles (21), munies de perçages (22) et des oeillets (23) sont réunies par deux semelles (24) et (25), soudées sur les deux oreilles (21) et disposées de manière à matérialiser la forme complémentaire de l'ensemble des surfaces supérieures (14a, 14b) et (14c) de la mâchoire (1). Les vis de fixation (5) viennent serrer les faces inférieures des semelles (24, 25) du support (2) au travers d'une pluralité de trous lisses, contre les faces (14a, 14b, 14c) de la mâchoire (1) usinées et taraudées pour recevoir lesdites vis. Une fois les vis en place, le coupleur est opérationnel.The invention will now be described according to FIGS. 3a and 3b, which show the device in an alternative embodiment where the connection between the jaw (1) and the support (2) is produced by screws. This variant of realization offers the advantage of proposing a removable device, and which allows the manufacturer to store the jaws and supports separately for a final assembly which can thus be postponed as needed. The support has substantially the same shape as in the previous variant, and the two ears (21), provided with holes (22) and eyelets (23) are joined by two soles (24) and (25), welded on the two ears (21) and arranged so as to materialize the complementary shape of the assembly upper surfaces (14a, 14b) and (14c) of the jaw (1). The screws fixing (5) tighten the undersides of the soles (24, 25) of the support (2) through a plurality of smooth holes, against the faces (14a, 14b, 14c) of the jaw (1) machined and tapped to receive said screws. Once the screws are in place, the coupler is operational.

L'invention va maintenant être décrite plus particulièrement en référence aux figures 4, 5. Quelque soit le mode d'assemblage du coupleur, son fonctionnement reste le même que la pièce connue et enseignée par le brevet FR 2 657 596. Ainsi la cinématique d'accrochage et de verrouillage est identique. Le coupleur est d'abord approché du godet (4) en présentant les crochets (11a, 11b) qui viennent s'arrimer sur deux formes complémentaires (41a, 41b) présentes sur une poutre (40) au sommet du godet (4) et l'on fait ensuite pivoter le coupleur pour rabattre l'extrémité opposée aux crochets (11a, 11b) afin de venir appuyer l'arbre à cames (31) dans un berceau (43) formé par deux évidements pratiqués sur deux oreilles (42) parallèles présentes à l'arrière du godet (4) Dans le même temps, un arbre (44) entre en contact avec les cames (3), entraínant ainsi leur rotation jusqu'à ce que les cames (3) puissent passer en dessous de l'arbre (44). Le verrouillage est alors assuré grâce aux cames (3) qui sont liées chacune à l'une des deux extrémités d'un ressort (32) cylindrique de torsion enroulé autour de l'arbre (31) de support des cames, l'autre extrémité du ressort étant lié audit arbre, l'action des ressorts tendant à faire pivoter les cames dans le sens du verrouillage ; les cames venant s'appuyer sur l'arbre (44).The invention will now be described more particularly in reference to FIGS. 4, 5. Whatever the method of assembling the coupler, its operation remains the same as the piece known and taught by the patent FR 2 657 596. Thus the kinematics of hooking and locking is identical. The coupler is first approached to the bucket (4) by presenting the hooks (11a, 11b) which come to rest on two forms complementary (41a, 41b) present on a beam (40) at the top of the bucket (4) and then rotate the coupler to fold the end opposite the hooks (11a, 11b) in order to support the camshaft (31) in a cradle (43) formed by two recesses made on two ears (42) parallel present at the rear of the bucket (4) At the same time, a shaft (44) comes into contact with the cams (3), thus causing their rotation until the cams (3) can pass under the shaft (44). The locking is then ensured by means of the cams (3) which are each linked to one of the two ends of a wound cylindrical torsion spring (32) around the cam support shaft (31), the other end of the spring being linked to said shaft, the action of the springs tending to rotate the cams in the locking direction; the cams coming to bear on the shaft (44).

Le démontage du godet demande d'effectuer dans l'ordre inverse ces opérations, en ayant au préalable déverrouillé les cames (3) au moyen d'un levier introduit dans un oeillet (33) présent sur chaque came permettant ainsi de contrer l'effort exercé par les ressorts de came.Dismantling the bucket requires performing these steps in reverse order operations, having previously unlocked the cams (3) by means of a lever introduced into an eyelet (33) present on each cam thus allowing to counteract the force exerted by the cam springs.

Dans une variante de réalisation, un système hydraulique pourra être adjoint aux cames de manière rendre le déverrouillage automatique.In an alternative embodiment, a hydraulic system may be added to the cams to make automatic unlocking.

Dans toutes les variantes de réalisation de l'invention, le support pourra être monté avec des bagues antifriction, au nombre de quatre et intercalées de chaque côté entre les bielles et les oreilles (21) et entre le bras articulé et les oreilles (21).In all the variant embodiments of the invention, the support can be fitted with anti-friction rings, four in number and inserted on each side between the connecting rods and the ears (21) and between the articulated arm and ears (21).

Il doit être évident pour les personnes versées dans l'art que la présente invention permet des modes de réalisation sous de nombreuses autres formes spécifiques sans l'éloigner du domaine d'application de l'invention comme revendiqué. Par conséquent, les présents modes de réalisation doivent être considérés à titre d'illustration mais peuvent être modifiés dans le domaine défini par la portée des revendications jointes ;It should be obvious to those skilled in the art that the present invention allows embodiments under many other specific forms without departing from the scope of the invention as claimed. Therefore, the present modes of realization must be considered as illustration but can be modified in the field defined by the scope of the appended claims;

Claims (9)

Dispositif d'attache rapide d'un outil à l'extrémité du bras articulé (27b) d'une pelle hydraulique, comportant une partie inférieure, appelée mâchoire (1), destinée à la prise d'un godet (4), une partie supérieure, appelée support (2), liée au bras de la pelle par des moyens de fixation, la mâchoire (1) comportant à l'une de ses extrémités un arbre à cames (31) en liaison pivot avec au moins une came (3), et à son autre extrémité deux crochets (11a,11b) semi-circulaires liés entre eux par au moins un pont transversal (16,17), la partie inférieure et la partie supérieure du dispositif étant deux pièces distinctes liées rigidement entre elles par des moyens de fixation et caractérisé en ce que la mâchoire (1) est obtenue à partir d'une pièce de fonderie monobloc, comportant deux bossages (12a,12b) à l'extrémité opposée aux crochets (11a, 11b) destinés à être traversés par deux perçages pour servir de support à l'arbre à cames (31), au moins un pont transversal (16, 17) permettant de relier de façon rigide les quatre portées (12a, 12b, 11a, 11b), l'un des ponts(16) étant situé en partie centrale de la mâchoire (1) entre les surfaces (14b, 14c), l'autre pont (17) situé à proximité des surfaces (14a).Device for quickly attaching a tool to the end of the articulated arm (27b) of a hydraulic shovel, comprising a lower part, called a jaw (1), intended for gripping a bucket (4), a part upper, called support (2), linked to the arm of the shovel by fixing means, the jaw (1) comprising at one of its ends a camshaft (31) in pivot connection with at least one cam (3 ), and at its other end two semi-circular hooks (11a, 11b) linked together by at least one transverse bridge (16,17), the lower part and the upper part of the device being two separate parts rigidly linked together by fixing means and characterized in that the jaw (1) is obtained from a one-piece foundry piece, comprising two bosses (12a, 12b) at the end opposite the hooks (11a, 11b) intended to be crossed by two holes to support the camshaft (31), at least one p have transverse (16, 17) for rigidly connecting the four spans (12a, 12b, 11a, 11b), one of the bridges (16) being located in the central part of the jaw (1) between the surfaces (14b , 14c), the other bridge (17) located near the surfaces (14a). Dispositif selon la revendication 1, caractérisée en ce que la surface intérieure (110) des crochets (11a, 11b) est un surface de révolution de section trapézoïdale isocèle dont la petite base constitue le diamètre minimum, matérialisant une forme conique facilitant l'approche des surfaces (41a, 41b) de poutre (40) du godet (4), vers les surfaces (110) de la mâchoire (1).Device according to claim 1, characterized in that the interior surface (110) of the hooks (11a, 11b) is a surface of revolution of isosceles trapezoidal section whose small base constitutes the minimum diameter, materializing a conical shape facilitating the approach of the beam surfaces (41a, 41b) of the bucket (40), towards the surfaces (110) of the jaw (1). Dispositif selon l'une l'une des revendications 1 à 2, caractérisé en ce que le support (2) est composé de deux plaques (21) découpées qui comportent chacune deux perçages (22) destinés à recevoir les axes de liaison avec la bielle (27a) d'une part et avec le bras articulé (27b) d'autre part, les plaques (21) comportant en outre deux oeillets (23) destinés à recevoir les dispositifs propres à la manutention de charges par l'engin porteurs.Device according to one of claims 1 to 2, characterized in that the support (2) is composed of two cut plates (21) which each have two holes (22) intended to receive the axes of connection with the connecting rod (27a) on the one hand and with the articulated arm (27b) on the other hand, the plates (21) further comprising two eyelets (23) intended to receive the devices suitable for handling loads by the carrier vehicle. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la mâchoire (1) et son support (2) sont liés par soudure, les oreilles (21) étant maintenues en position grâce à la rigidité de la mâchoire (1), moulées et obtenue par l'un au moins des ponts (16, 17).Device according to one of claims 1 to 3, characterized in that the jaw (1) and its support (2) are connected by welding, the ears (21) being held in position thanks to the rigidity of the jaw (1) , molded and obtained by at least one of the bridges (16, 17). Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que les vis de fixation (5) serrent les faces inférieures des semelles (24, 25) du support (2) au travers d'une pluralité de trous lisses, lesdites semelles étant liées par soudure aux plaques (21), contre les faces (14a, 14b, 14c) de la mâchoire (1) usinées et taraudées pour recevoir lesdites vis et créant ainsi une liaison démontable.Device according to one of claims 1 to 3, characterized in that the fixing screws (5) tighten the undersides of the flanges (24, 25) of the support (2) through a plurality of smooth holes, said flanges being bonded by welding to the plates (21), against the faces (14a, 14b, 14c) of the jaw (1) machined and tapped to receive said screws and thus creating a removable connection. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que les cames (3) de verrouillage sont liées chacune à l'une des extrémités d'au moins un ressort (32) cylindrique de torsion enroulé autour de l'arbre (31) de support de came, l'autre extrémité du ressort étant lié à la mâchoire (1), l'action des ressorts tendant à faire pivoter les cames dans le sens du verrouillage.Device according to one of Claims 1 to 5, characterized in that the locking cams (3) are each linked to one of the ends of at least one cylindrical torsion spring (32) wound around the shaft ( 31) of cam support, the other end of the spring being linked to the jaw (1), the action of the springs tending to rotate the cams in the locking direction. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que les cames (3) de verrouillage comportent un logement (33) cylindrique débouchant d'axe parallèle à l'axe de rotation des cames (3), permettant d'articuler un levier pour exercer un effort contrant l'effort du (des) ressort(s) et permettant le déverrouillage du dispositif.Device according to one of claims 1 to 6, characterized in that the locking cams (3) comprise a cylindrical housing (33) opening with an axis parallel to the axis of rotation of the cams (3), making it possible to articulate a lever for exerting a force countering the force of the spring (s) and allowing the device to be unlocked. Dispositif selon l'une des revendications 1à 7, caractérisé en ce que les cames (3) de verrouillage comporte un logement (33) cylindrique ouvert d'axe parallèle à l'axe de rotation des cames (3), permettant d'y introduire un levier pour exercer un effort contrant l'action du ressort (32) et ainsi permettre le déverrouillage des cames. Device according to one of claims 1 to 7, characterized in that the locking cams (3) comprises an open cylindrical housing (33) with an axis parallel to the axis of rotation of the cams (3), making it possible to introduce therein a lever for exerting a force countering the action of the spring (32) and thus allowing the cams to be unlocked. Dispositif selon l'une des revendications 1 à 5 et 7, caractérisée en ce que chaque came (3) comporte un dispositif de déverrouillage hydraulique permettant un déverrouillage automatique des cames (3).Device according to one of claims 1 to 5 and 7, characterized in that each cam (3) comprises a hydraulic unlocking device allowing an automatic unlocking of the cams (3).
EP04291178A 2003-05-09 2004-05-07 Tool quick coupler for excavators Expired - Lifetime EP1475481B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0305664A FR2854644B1 (en) 2003-05-09 2003-05-09 DEVICE FOR RAPID ATTACHMENT OF EXCAVATION MACHINE TOOL
FR0305664 2003-05-09

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EP1475481A1 true EP1475481A1 (en) 2004-11-10
EP1475481B1 EP1475481B1 (en) 2012-02-15

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EP04291178A Expired - Lifetime EP1475481B1 (en) 2003-05-09 2004-05-07 Tool quick coupler for excavators

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EP (1) EP1475481B1 (en)
AT (1) ATE545738T1 (en)
ES (1) ES2381107T3 (en)
FR (1) FR2854644B1 (en)
PT (1) PT1475481E (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438931A1 (en) * 1990-01-26 1991-07-31 Societe En Nom Collectif Morin Freres Device for connecting a bucket, or the like, to the boom end of a loader
US5382110A (en) * 1992-12-30 1995-01-17 Esco Corporation Quick coupling device
FR2713681A1 (en) * 1993-12-14 1995-06-16 Morin Freres Control mechanism for digger bucket ejector blade
DE29810750U1 (en) * 1998-06-16 1998-10-01 Atlas Weyhausen GmbH, 27751 Delmenhorst Quick change device
EP0950767A2 (en) * 1998-03-02 1999-10-20 Les Ateliers de Monsin Quick coupling device for the mounting and the removing of crane buckets
US6139212A (en) * 1998-02-11 2000-10-31 Rockland Manufacturing Co. Coupler for excavating machines and the like having fixed and moveable jaws

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438931A1 (en) * 1990-01-26 1991-07-31 Societe En Nom Collectif Morin Freres Device for connecting a bucket, or the like, to the boom end of a loader
US5382110A (en) * 1992-12-30 1995-01-17 Esco Corporation Quick coupling device
FR2713681A1 (en) * 1993-12-14 1995-06-16 Morin Freres Control mechanism for digger bucket ejector blade
US6139212A (en) * 1998-02-11 2000-10-31 Rockland Manufacturing Co. Coupler for excavating machines and the like having fixed and moveable jaws
EP0950767A2 (en) * 1998-03-02 1999-10-20 Les Ateliers de Monsin Quick coupling device for the mounting and the removing of crane buckets
DE29810750U1 (en) * 1998-06-16 1998-10-01 Atlas Weyhausen GmbH, 27751 Delmenhorst Quick change device

Also Published As

Publication number Publication date
PT1475481E (en) 2012-04-17
FR2854644B1 (en) 2006-05-12
FR2854644A1 (en) 2004-11-12
ATE545738T1 (en) 2012-03-15
EP1475481B1 (en) 2012-02-15
ES2381107T3 (en) 2012-05-23

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