EP0273828B1 - Snap-fastening device for public works and maintenance implements - Google Patents

Snap-fastening device for public works and maintenance implements Download PDF

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Publication number
EP0273828B1
EP0273828B1 EP19870402988 EP87402988A EP0273828B1 EP 0273828 B1 EP0273828 B1 EP 0273828B1 EP 19870402988 EP19870402988 EP 19870402988 EP 87402988 A EP87402988 A EP 87402988A EP 0273828 B1 EP0273828 B1 EP 0273828B1
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EP
European Patent Office
Prior art keywords
equipment
arm
hydraulic
bolt
hook
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Expired - Lifetime
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EP19870402988
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German (de)
French (fr)
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EP0273828A1 (en
Inventor
Gilles Poncin
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ARDENNES EQUIPMENT SA
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ARDENNES EQUIPMENT SA
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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
    • E02F3/3627—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 longitudinal locking element
    • 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
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated

Definitions

  • the present invention relates to a fastening device for fastening equipment of civil engineering and handling equipment and in particular for equipment of hydraulic shovels of loaders or other used in public works, forestry or handling.
  • the arm of the machine carries at its end a beam around which the tool hangs and on which is mounted a part integrally comprising a jack intended to block and hold the tool.
  • the object of the present invention is to solve these drawbacks and provides a simple, light quick-coupling device, without extending the operating range of the tool, which can be operated directly from the driving position, and which makes it possible to receive a large number of tools of different origins.
  • the equipment to be coupled is an excavator bucket 1 which is articulated by an axis 6 at the end of a mechanical shovel arm 2, the movements in the direction D1 (digging) out in the direction D2 (emptying of the bucket) being caused by a hydraulic cylinder 3, carried by the arm 2, the rod 4 of which is articulated to an axis carried by two ears secured to the bucket 1.
  • the cylindrical beam 5 no longer carries fixing ears and the bucket 1 is no longer articulated directly to the arm 2.
  • the axis 6, located at the end of the arm 2 carries a yoke which is articulated by an axis 7 at the end of the rod 4 of the jack 3.
  • the jack 3 makes the yoke 8 pivot around axis 6.
  • the yoke 8 consists of two parallel flanges 8a and 8b (FIG. 3) which are connected to each other by two spacers 9 and 10.
  • Each flange 8 has a semi-circular recess 5a whose radius is substantially equal to that of the cylindrical beam 5 of the bucket 1.
  • the spacer 10 carries one or two locking cylinders 11, the latches 13 of which engage in correspondingly shaped orifices 16a, formed in the tab 16.
  • the spacer 10 carries two jacks 11 so that the tab 16 has two holes 16a.
  • the jack 11 has at the rear a plug 18 which serves as a fulcrum for a spring 19 which acts in the same direction as the pressure coming from the jack 3 to maintain the lock 13 in hole 16a.
  • the cylinder 11 is a double-acting cylinder and for this purpose comprises a chamber 11 a connected by an orifice 17 to an unlocking pressure.
  • This unlocking pressure can be supplied by any known type of hydraulic device. It can come from the main hydraulic pump supplying the jack 3; it can come from an accumulator, or from an auxiliary pump.
  • This auxiliary pump can be very simply constituted by a piston pump 14 actuated by a lever 15 located in the cabin of the machine, this pump 14 being connected to the orifice 17 by a pipe 14a.

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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)
  • Revetment (AREA)

Description

La présente invention a pour objet un dispositif d'attache raipde pour équipements d'engins de génie civil et de manutention et notamment pour des équipements de pelles hydrauliques de chargeurs ou autres utilisés en travaux public, forestage ou manutention.The present invention relates to a fastening device for fastening equipment of civil engineering and handling equipment and in particular for equipment of hydraulic shovels of loaders or other used in public works, forestry or handling.

La plupart de ces appareils comportent un bras à l'extrémité duquel est monté à pivotement un équipement (godet par exemple), le pivotement de cet équipement étant commandé par un vérin hydraulique.Most of these devices include an arm at the end of which equipment is pivotally mounted (bucket for example), the pivoting of this equipment being controlled by a hydraulic cylinder.

Dans les premiers appareils ces équipements ou outils d'extrémité étaient montés par l'intermédiaire de biellettes, d'arbres et de boulons, mais le dispositif de montage, simple en soi, ne permettait pas de démonter rapidement l'outil, ce qui présente un inconvénient assez important lorsque les conditions de travail nécessitent l'emploi successifs de plusieurs outils (godets étroits, larges, pelles, etc).In the first devices these end devices or tools were mounted by means of rods, shafts and bolts, but the mounting device, simple in itself, did not allow the tool to be dismantled quickly, which presents a rather significant drawback when the working conditions require the successive use of several tools (narrow, wide buckets, shovels, etc.).

Des dispositifs d'attache rapide ont été créés afin de pouvoir monter l'outil ou le démonter depuis le poste de pilotage de l'engin. Cependant ces dispositifs présentent des inconvénients :

  • a) ils nécessitent toujours une opération manuelle de verrouillage par le chauffeur de l'engin qui doit finalement descendre de son poste de conduite;
  • b) ils allongent le rayon d'action des dents de l'outil du fait que ces attaches s'intercalent entre les attaches du godet et les axes d'articulation de l'extrémité du bras de l'engin sur laquelle vient se monter le dispositif d'attache ;
  • c) ils sont lourds et complexes ;
  • d) leur conception compliquée est génératrice de jeux qui s'amplifient pendant le fonctionnement.
Quick attach devices have been created in order to be able to mount the tool or disassemble it from the cockpit of the machine. However, these devices have drawbacks:
  • a) they always require a manual locking operation by the driver of the machine who must finally get out of his cockpit;
  • b) they lengthen the radius of action of the teeth of the tool because these fasteners are inserted between the fasteners of the bucket and the hinge pins of the end of the arm of the machine on which the fastening device;
  • c) they are heavy and complex;
  • d) their complicated design generates games which are amplified during operation.

A titre d'exemple le brevet anglais GB-A-20 4942 décrit un tel dispositif.By way of example, English patent GB-A-20 4942 describes such a device.

Dans ce brevet, le bras de l'engin porte à son extrémité une poutre autour de laquelle vient s'accrocher l'outil et sur laquelle est montée solidairement un pièce comportant un vérin destiné à bloquer et à maintenir l'outil.In this patent, the arm of the machine carries at its end a beam around which the tool hangs and on which is mounted a part integrally comprising a jack intended to block and hold the tool.

Ce dispositif présente cependant les inconvénients suivants :

  • - le dispositif de commande du blocage est électro- commandé et intégré dans le dispositif de commande des vérins de l'outil ; il doit en conséquence être capable d'un grand débit (celui de l'équipement) et de supporter une haute pression (celle de l'équipement). Un tel dispositif est alors nécessairement lourd et d'un coût élevé.
  • - le dispositif de blocage, s'il maintient bien l'équipement à l'extrémité du bras, présente des jeux qui s'amplifient lors du fonctionnement.
  • - l'outil venant directement en prise sur l'extrémité du bras de l'engin, doit nécessairement être configuré pour s'adapter sur cette extrémité. Ils sont donc fabriqués généralement par le même constructeur et les outils différents ne peuvent être utilisés.
However, this device has the following drawbacks:
  • - the locking control device is electro-controlled and integrated into the tool actuator control device; it must therefore be capable of a large flow (that of the equipment) and withstand a high pressure (that of the equipment). Such a device is then necessarily heavy and of high cost.
  • - the locking device, if it holds the equipment well at the end of the arm, has clearances which increase during operation.
  • - the tool directly engaging on the end of the arm of the machine, must necessarily be configured to fit on this end. They are therefore generally manufactured by the same manufacturer and different tools cannot be used.

La présente invention a pour objectif de résoudre ces inconvénients et propose un dispositif d'attache rapide simple, léger, sans allongement du rayon d'action de l'outil, manoeuvrable directement depuis le poste de conduite, et permettant de recevoir un grand nombre d'outils de différentes origines.The object of the present invention is to solve these drawbacks and provides a simple, light quick-coupling device, without extending the operating range of the tool, which can be operated directly from the driving position, and which makes it possible to receive a large number of tools of different origins.

La présente invention a pour objet un dispositif d'attache rapide pour outils d'engins hydrauliques articulés à l'extrémité d'un brad dudit engin dans lequel l'extrémité avant du bras comporte un axe de rotation définissant le centre de giration de l'outil, et un vérin hydraulique de commande de la rotation de l'outil, du type comportant une chape formée de deux flasques parallèles, solidaires entre aux par des entretoises, montée à pivotement sur l'axe d'extrémité avant du bras, entre le bras et l'équipement, la chape étant portée par l'axe de pivotement de l'équipement, et comportant un vérou hydraulique destiné à assurer le maintien de la liaison entre l'outil et le bras, caractérisé en ce que:

  • - la chape comporte un crochet (5a) venant s'engager sur un bossage porté par l'outil, ledit crochet étant situé sensiblement à l'opposé du verrou,
  • - l'outil comporte solidairement au moins une patte, destinée à recevoir le verrou, de telle sorte que l'outil est monté sur la chappe, et est maintenu par, d'une part la coopération du crochet et du bossage, et d'autre part l'action du verrou contre la patte qui d'une part immobilise la patte en position, et d'autre part maintient fermement le bossage dans le crochet,
  • - et que l'axe de pivotement de l'outil est séparé de l'outil lui-même.
The present invention relates to a quick coupling device for hydraulic machine tools articulated at the end of a brad of said machine in which the front end of the arm has an axis of rotation defining the center of gyration of the tool, and a hydraulic cylinder for controlling the rotation of the tool, of the type comprising a yoke formed of two parallel flanges, secured between by spacers, pivotally mounted on the front end axis of the arm, between the arm and the equipment, the yoke being carried by the pivot axis of the equipment, and comprising a hydraulic lock designed to maintain the connection between the tool and the arm, characterized in that:
  • the yoke has a hook (5a) which engages on a boss carried by the tool, said hook being located substantially opposite the latch,
  • - The tool integrally comprises at least one lug, intended to receive the lock, so that the tool is mounted on the clevis, and is held by, on the one hand the cooperation of the hook and the boss, and on the other hand, the action of the latch against the tab which on the one hand immobilizes the tab in position, and on the other hand firmly maintains the boss in the hook,
  • - And that the pivot axis of the tool is separated from the tool itself.

Le dispositif est encore remarquable par les dispositions suivantes:

  • - a) les moyens de verrouillage sont constitués par un verrou de forme tronconique s'engageant dans un orifice de forme correspondante, ledit verrou constituant le piston d'un vérin hydraulique à double effet,
  • - b) le vérin hydraulique est relié pour le verrouillage à la chambre du vérin dans laquelle règne la haute pression de travail et pour le déverrouillage à une autre pression hydraulique,
  • - c) la pression d déverrouillage est fournie par une pompe manuelle à piston située dans la cabine de pilotage de l'engin,
  • - d) l'équipement est un godet excavateur d'une pelle hydraulique, le bossage sur lequel font prises les crochets de la chape étant une poutre transversale cylindrique et la patte étant fixée au dos dudit godet,
  • - e) les crochets sont constitués par des évidements circulaires de même diamètre que celui de la poutre cylindrique,
  • - f) la chape comporte deux vérins, un en face de chaque crochet.
The device is also remarkable for the following provisions:
  • a) the locking means consist of a frustoconical lock engaging in a correspondingly shaped orifice, said lock constituting the piston of a double-acting hydraulic cylinder,
  • b) the hydraulic cylinder is connected for locking to the cylinder chamber in which the high working pressure prevails and for unlocking at another hydraulic pressure,
  • - c) the unlocking pressure is supplied by a manual piston pump located in the cockpit of the machine,
  • d) the equipment is an excavator bucket of a hydraulic shovel, the boss on which the hooks of the yoke are taken being a cylindrical transverse beam and the tab being fixed to the back of said bucket,
  • - e) the hooks are constituted by circular recesses of the same diameter as that of the cylindrical beam,
  • - f) the yoke has two cylinders, one opposite each hook.

A titre d'exemple non limitatif et pour faciliter la compréhension de l'invention, on a représenté aux dessins annexés :

  • Figure 1 une vue en élévation latérale d'une pelle hydraulique munie d'un godet excavateur muni d'une attache rapide selon l'invention;
  • Figure 2 une vue à grande échelle du dispositif d'attache rapide de la figure 1 ;
  • Figure 3, une vue en plan de la figure 2 ;
  • Figure 4, une vue de détail à grande échelle du vérin de verrouillage des figures 2 et 3.
By way of nonlimiting example and to facilitate understanding of the invention, the accompanying drawings show:
  • Figure 1 a side elevational view of a hydraulic shovel provided with an excavator bucket provided with a quick coupler according to the invention;
  • Figure 2 a large-scale view of the quick coupler of Figure 1;
  • Figure 3, a plan view of Figure 2;
  • Figure 4, a large-scale detail view of the locking cylinder of Figures 2 and 3.

L'invention sera décrite ci-après dans le cadre de son application à un godet excavateur de pelle mécanique, mais elle n'est pas limitée à ce cas particulier et peut être appliquée à d'autres équipements de pelle mécanique, comme elle peut être appliquée à des godets de chargeurs et à tous équipements d'appareils hydrauliques de manutention de travaux publics ou forestiers.The invention will be described below in the context of its application to an excavator excavator bucket, but it is not limited to this particular case and can be applied to other mechanical excavator equipment, as it can be applied to loader buckets and to all equipment for hydraulic equipment for handling public or forestry works.

Dans le cas de l'exemple repésenté, l'équipement à atteler est un godet excavateur 1 qui est articulé par un axe 6 à l'extrémité d'un bras 2 de pelle mécanique, les mouvements dans le sens D1 (creusement) out dans le sens D2 (vidange du godet) étant provoqués par un vérin hydraulique 3, porté par le bras 2, dont la tige 4 est articulée à un axe porté par deux oreilles solidaires du godet 1.In the case of the example shown, the equipment to be coupled is an excavator bucket 1 which is articulated by an axis 6 at the end of a mechanical shovel arm 2, the movements in the direction D1 (digging) out in the direction D2 (emptying of the bucket) being caused by a hydraulic cylinder 3, carried by the arm 2, the rod 4 of which is articulated to an axis carried by two ears secured to the bucket 1.

Dans le brevet FR-A-2 378 137, on a décrit un tel godet dont le dos porte à sa partie supérieure une poutre transversale cylindrique 5 à laquelle sont fixées deux oreilles portant l'axe d'articulation du godet sur l'extrémité du bras et l'axe d'articulation dudit godet à l'extrémité du vérin, tel que le vérin 3.In patent FR-A-2 378 137, such a bucket has been described, the back of which carries at its upper part a cylindrical transverse beam 5 to which are fixed two ears carrying the axis of articulation of the bucket on the end of the arm and the hinge pin of said bucket at the end of the jack, such as jack 3.

Selon la présente invention, la poutre cylindrique 5 ne porte plus d'oreilles de fixation et le godet 1 n'est plus articulé directement au bras 2.According to the present invention, the cylindrical beam 5 no longer carries fixing ears and the bucket 1 is no longer articulated directly to the arm 2.

Selon la présente invention, l'axe 6, situé à l'extrémité du bras 2 porte une chape qui est articulée par un axe 7 à l'extrémité de la tige 4 du vérin 3. Ainsi, le vérin 3 fait pivoter la chape 8 autour de l'axe 6.According to the present invention, the axis 6, located at the end of the arm 2 carries a yoke which is articulated by an axis 7 at the end of the rod 4 of the jack 3. Thus, the jack 3 makes the yoke 8 pivot around axis 6.

Dans l'exemple représenté, la chape 8 est constituée de deux flasques parallèles 8a et 8b (figure 3) qui sont reliées l'une à l'autre par deux entretoises 9 et 10.In the example shown, the yoke 8 consists of two parallel flanges 8a and 8b (FIG. 3) which are connected to each other by two spacers 9 and 10.

Chaque flasque 8 comporte un évidement semi- circulaire 5a dont le rayon est sensiblement égal à celui de la poutre cylindrique 5 du godet 1. Lorsque le vérin 3 fait pivoter la chape 8, les crochets 5a viennent faire prise sur ladite poutre 5 et l'entretoise arrière 10 située sensiblement à l'opposé des crochets 5a vient se placer en face d'une patte 16 fixées au dos du godet 1.Each flange 8 has a semi-circular recess 5a whose radius is substantially equal to that of the cylindrical beam 5 of the bucket 1. When the jack 3 rotates the yoke 8, the hooks 5a come to grip on said beam 5 and the rear spacer 10 located substantially opposite the hooks 5a is placed opposite a tab 16 fixed to the back of the bucket 1.

L'entretoise 10 porte un ou deux vérins de verrouillage 11 dont les verrous 13 viennent s'engager dans des orifices de forme correspondante 16a, ménagés dans la patte 16.The spacer 10 carries one or two locking cylinders 11, the latches 13 of which engage in correspondingly shaped orifices 16a, formed in the tab 16.

Dans l'exemple repésenté, l'entretoise 10 porte deux vérins 11 de sorte que la patte 16 comporte deux orifices 16a.In the example shown, the spacer 10 carries two jacks 11 so that the tab 16 has two holes 16a.

De préférence :

  • a) chaque verrou 13 est tronconique et chaque orifice 16a à une forme correspondante, de sorte que la liaison verrou 13 - orifice 16a est sans jeu possible ;
  • b) l'axe des orifices 16a passe par la poutre 5 de telle sorte que lorsque les vérins 11 exercent sur la patte 16 une force Fi, les crochets 5a sont poussés sur la poutre 5 avec la même force F1 comme l'illustre la figure 2. Il en résulte que l'effort de verrouillage des vérins 16 est intégralement retransmis au crochet 5;
  • c) chaque vérin est relié par une conduite souple 12 à la chambre de pression 3a du vérin de commande 3. Ainsi lorsque le godet est en action de travail D1 sous la plus forte pression régnant dans la chambre 3a, chaque verrou 13 est soumis à la même pression. Les deux vérins 11 exercent sur la patte 16 une force F1 qui pousse les crochets 5a sur la poutre 5; et l'effort de verrouillage de la chape 8 sur le godet 1 est proportionnel à l'effort exercé sur ledit godet, ce qui permet de rattraper les jeux re ce dispositif de fixation.
Preferably:
  • a) each latch 13 is frustoconical and each orifice 16a has a corresponding shape, so that the connection between latch 13 and orifice 16a is without play possible;
  • b) the axis of the orifices 16a passes through the beam 5 so that when the jacks 11 exert on the leg 16 a force Fi, the hooks 5a are pushed on the beam 5 with the same force F1 as illustrated in the figure 2. It follows that the locking force of the jacks 16 is fully retransmitted to the hook 5;
  • c) each jack is connected by a flexible pipe 12 to the pressure chamber 3a of the control jack 3. Thus when the bucket is in working action D1 under the highest pressure prevailing in the chamber 3a, each lock 13 is subjected to the same pressure. The two jacks 11 exert on the tab 16 a force F1 which pushes the hooks 5a on the beam 5; and the locking force of the yoke 8 on the bucket 1 is proportional to the force exerted on said bucket, which makes it possible to make up for the games re this fixing device.

En se reportant à la figure 4, on voit que le vérin 11 comporte à l'arrière un bouchon 18 qui sert de point d'appui à un ressort 19 qui agit dans le même snes que la pression en provenance du vérin 3 pour maintenir le verrou 13 dans l'orifice 16a. Le vérin 11 est un vérin à double effet et dans ce but comporte une chambre 11 a reliée par un orifice 17 à une pression de déverrouillage.Referring to FIG. 4, it can be seen that the jack 11 has at the rear a plug 18 which serves as a fulcrum for a spring 19 which acts in the same direction as the pressure coming from the jack 3 to maintain the lock 13 in hole 16a. The cylinder 11 is a double-acting cylinder and for this purpose comprises a chamber 11 a connected by an orifice 17 to an unlocking pressure.

Cette pression de déverrouillage peut être fournie par tout dispositif hydraulique de type connu. Elle peut provenir de la pompe hydraulique principale alimentant le vérin 3; elle peut provenir d'un accumulateur, ou encore d'une pompe auxiliaire.This unlocking pressure can be supplied by any known type of hydraulic device. It can come from the main hydraulic pump supplying the jack 3; it can come from an accumulator, or from an auxiliary pump.

Cette pompe auxiliaire peut être d'une façon très simple constituée par une pompe à piston 14 actionnée par un levier 15 situé dans la cabine de l'engin, cette pompe 14 étant reliée à l'orifice 17 par une canalisation 14a.This auxiliary pump can be very simply constituted by a piston pump 14 actuated by a lever 15 located in the cabin of the machine, this pump 14 being connected to the orifice 17 by a pipe 14a.

La présente invention apporte les avantages essentiels suivants:

  • a) le rayon de giration R des dents du godet, par rapport à l'axe de pivotement 6, est réduit relativement aux attaches rapides de type connu;
  • b) la chape 8 constitue non seulement une pièce d'attache rapide mais aussi une pièce d'adaptation permettant de fixer à l'extrémité du bras d'un engin n'importe quel outil même si cet outil n'avait pas été conçu pour cet engin à l'origine. La chape réalise ainsi une pièce d'adaptation universelle et il est possible de prévoir une grande variété de chapes, chacune d'entre elles étant destinée à recevoir une gamme de produits selon les caractéristiques particulières de chaque constructeur;
  • c) la forme tronconique de chaque verrou inférieur engendre un effort F sur la partie supérieure de l'attache qui se décompose toujours en un effort de coincement du crochet opposé et cette disposition évite tous les jeux qui s'aggravent habituellement en fonctionnnement ;
  • d) le dispositif de commande raccordé directement au vérin de commande du godet évite l'emploi d'un distributeur de commande complexe, coûteux et fragile et donne au verrouillage un effort de blocage proportionnel à l'effort dans le vérin donc aux dents de l'outil.
The present invention provides the following essential advantages:
  • a) the turning radius R of the teeth of the bucket, with respect to the pivot axis 6, is reduced relative to the quick couplings of known type;
  • b) the yoke 8 constitutes not only a quick attachment part but also an adaptation part making it possible to fix any tool at the end of the arm of the machine, even if this tool was not designed for this craft originally. The yoke thus achieves a universal adaptation piece and it is possible to provide a wide variety of yokes, each of them being intended to receive a range of products according to the particular characteristics of each manufacturer;
  • c) the frustoconical shape of each lower lock generates a force F on the upper part of the fastener which always breaks down into a force of jamming of the opposite hook and this arrangement avoids all the games which usually worsen during operation;
  • d) the control device connected directly to the bucket control cylinder avoids the use of a complex, expensive and fragile control distributor and gives the locking a locking force proportional to the force in the cylinder, therefore to the teeth of the 'tool.

Claims (5)

1. Rapid attaching device for hydraulic machine equipment articulated at the end of an arm of the said machine in which the front end of the arm comprises a rotational shaft defining the centre of gyration of the equipment and an hydraulic jack which controls the rotation of the equipment of the type comprising a frame formed from two parallel flanges rendered integral with each other by means of struts mounted so as to pivot on the front end shaft of the arm, between the arm and the equipment. the frame being supported by the pivot shaft of the equipment and comprising an hydraulic bolt for maintaining the connection between the tool and the arm, characterized in that;
- the frame comprises a hook (5a) engaging on a boss supported by the tool, the said hook being disposed substantially on the opposite side to the bolt;
- the equipment comprises integrally at least one fastening (16) for receiving the bolt (13) in such a way that the equipment is mounted on the frame and is maintained as a result, on the one hand of the hook cooperating with the boss and on the other hand by the bolt acting against the fastening which on the one hand immobilizes the fastening in position and on the other hand firmly maintains the boss (5) in the hook (5a);
- and in that the pivot shaft (6) of the equipment is separated from the equipment itself.
2. Device according to claim 1 in which the bolting means are composed of a bolt (13) truncated in shape engaging in an opening (16a) of a corresponding shape, the said bolt (13) forming the piston of a double action hydraulic jack (11).
3. Device according to claim 2 in which the hydraulic jack (11) is connected for the bolting step to the chamber (3a) of the jack (3) in which the high operating pressure prevails and for the unbolting step to a different hydraulic pressure.
4. Device according to claim 3 in which the unbolting pressure is provided by a manual piston pump (14) which is situated in the machine control cabin.
5. Device according to any one of the preceding claims in which the equipment is an excavator bucket (1) with an hydraulic scoop the boss on which the hooks (5a, of the frame (8) engage being a transverse cylindrical beam (5) and the fastening (16) being attached to the back of the said bucket.
EP19870402988 1986-12-26 1987-12-24 Snap-fastening device for public works and maintenance implements Expired - Lifetime EP0273828B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8618204A FR2609075B1 (en) 1986-12-26 1986-12-26 QUICK COUPLING DEVICE FOR EQUIPMENT OF CIVIL ENGINEERING AND HANDLING EQUIPMENT
FR8618204 1986-12-26

Publications (2)

Publication Number Publication Date
EP0273828A1 EP0273828A1 (en) 1988-07-06
EP0273828B1 true EP0273828B1 (en) 1990-10-17

Family

ID=9342319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870402988 Expired - Lifetime EP0273828B1 (en) 1986-12-26 1987-12-24 Snap-fastening device for public works and maintenance implements

Country Status (3)

Country Link
EP (1) EP0273828B1 (en)
DE (1) DE3765631D1 (en)
FR (1) FR2609075B1 (en)

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GB9005074D0 (en) * 1990-03-07 1990-05-02 Aubrey Martin J Coupling
DE4010224C2 (en) * 1990-03-30 1994-05-19 Porsche Ag Quick change device
US5147173A (en) * 1991-06-03 1992-09-15 Caterpillar Inc. Coupling device
GB2265601B (en) * 1992-03-11 1995-08-09 Samuel Trevor Mason Excavator with quick-change bucket system
DE4214569C2 (en) * 1992-05-08 2001-12-20 Lehnhoff Hartstahl Gmbh & Co Quick change device
GB2259293B (en) * 1992-10-20 1996-01-10 Hugh Robert Edeleanu Excavator Bucket Coupling System
FR2697302B1 (en) * 1992-10-23 1994-12-30 Dorguin Jean Pierre Quick coupling device for civil engineering and handling equipment.
IT1263342B (en) * 1993-03-19 1996-08-05 SELF-LOCKING QUICK COUPLING FOR THE RELEASE OF BUCKETS OR SIMILAR TO OPERATING MACHINES
FR2708679B1 (en) * 1993-08-06 1995-09-01 Pel Job Groupe Device for automatic tool gripping for earth-moving machinery or the like.
GB2286382A (en) * 1994-02-04 1995-08-16 Bamford Excavators Ltd Device for releasably mounting a working implement
US5727342A (en) * 1996-04-18 1998-03-17 Wain-Roy, Inc. Hydraulic latch pin assembly for coupling a tool to a construction equipment
DE29702648U1 (en) * 1997-02-15 1997-04-03 Warthold, Jürgen, 59229 Ahlen Device for locking and unlocking a tool on a tool holder frame of skid steer loaders
GB2330570B (en) 1998-09-08 1999-09-15 Miller Ronald Keith Quick coupler for bucket excavators
GB2330569B (en) 1998-09-08 1999-09-15 Miller Ronald Keith Coupler for bucket excavators
GB2362371B (en) * 2000-05-16 2004-09-22 Miller Welding Engineers Ltd Bucket with improved breakout force
US6431785B1 (en) 2000-06-05 2002-08-13 Wec Co. Direct pin quick coupler
FR2900168B1 (en) * 2006-04-21 2010-04-23 Morin COUPLER FOR MIXED UNLOCKING WORK EQUIPMENT
US10246848B2 (en) * 2016-01-11 2019-04-02 Caterpillar Inc. Upper hinge design for a bucket

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US3243066A (en) * 1964-01-20 1966-03-29 Caterpillar Tractor Co Quick change means for loader attachments
US3876092A (en) * 1974-07-26 1975-04-08 Rivinius Inc Implement connecting coupler mechanism
GB2014942B (en) * 1978-02-21 1982-07-28 Loed Corp Implement coupling apparatus
US4214840A (en) * 1979-01-18 1980-07-29 J. H. Beales Steel Fabricators, Ltd. Quick-release coupler
FR2475160A1 (en) * 1980-01-31 1981-08-07 Pingon Pierre De AUTOMATIC TOOL HOLDING DEVICE FOR EXCAVATOR, LOADER, EARTHMOVING MACHINE OR THE LIKE
FR2542049B1 (en) * 1983-03-04 1986-06-06 Agram LOCKABLE LOCKING DEVICE FOR LOADER TOOL HOLDERS

Also Published As

Publication number Publication date
FR2609075A1 (en) 1988-07-01
FR2609075B1 (en) 1991-08-30
EP0273828A1 (en) 1988-07-06
DE3765631D1 (en) 1990-11-22

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