EP0467837B1 - Connection of a tool to an arm of an excavating machine - Google Patents

Connection of a tool to an arm of an excavating machine Download PDF

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Publication number
EP0467837B1
EP0467837B1 EP91810540A EP91810540A EP0467837B1 EP 0467837 B1 EP0467837 B1 EP 0467837B1 EP 91810540 A EP91810540 A EP 91810540A EP 91810540 A EP91810540 A EP 91810540A EP 0467837 B1 EP0467837 B1 EP 0467837B1
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EP
European Patent Office
Prior art keywords
end piece
tool
connection
ramps
catches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP91810540A
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German (de)
French (fr)
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EP0467837A1 (en
Inventor
Etienne Moinat
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Individual
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Individual
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Publication of EP0467837A1 publication Critical patent/EP0467837A1/en
Priority to US08/174,383 priority Critical patent/US5394630A/en
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Publication of EP0467837B1 publication Critical patent/EP0467837B1/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
    • E02F3/364—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using wedges

Definitions

  • the object of the present invention is to fix a tool at the end of a site machine arm provided with an articulated end piece intended to receive the tool, in which the end piece is provided with two pairs of projections profiles each having a ramp inclined in the direction of engagement of the end piece in the tool, the projections of the end piece engaging under two pairs of corresponding projections, also provided with tool ramps, the ramps of the end piece coming to bear on the ramps of the tool, during the engagement of the end piece in the tool, the ramps of the tool having relative to the tool an inclination identical to that of the ramps of the end piece relative to the end piece, the fixing comprising a locking member of the end piece on the tool, that the pair of profiled projections of the end piece are formed on two lateral faces parallel to the end piece, that the pairs of protrusions of the tool are formed on the sides of two parallel ribs, the spacing of which corresponds to the width of the end piece, and that the fixing also comprises mechanical means maintaining a prestress on the locking member, this preload now pushing on
  • Such attachment is known from DE-U-90 00 721.
  • the end piece is provided with two pairs of projections in the form of hooks penetrating by cutouts in the bottom of the tool to engage, by moving forward, under ramps provided on the inside of the bottom of the tool.
  • the attachment is locked by latches engaged in the cutouts through which the pair of front hooks pass. These locks are engaged with play between the hooks and the cutouts and therefore have only a safety function.
  • a slight setback of the end piece relative to the tool can occur in particular each time the tool is used in a scraper. This play results in violent shocks on the fixing hooks, shocks likely to cause the breakage of the hook attachment to the end piece.
  • Document WO-A-8504917 discloses a fixing in which the end piece and the tool are provided with projections having ramps by which the end piece and the tool are engaged and fixed one inside the other.
  • the face of the tool opposite the workpiece terminal has two transverse projections provided with opposite ramps and facing one another defining a dovetail profile, while the terminal part has a transverse projection homologous to the rear projection of the tool and two moving parts on oblique guides coming to engage under the ramp of the anterior projection of the tool to fix the assembly.
  • the object of the present invention is to provide a secure fastening, with automatic backlash, which does not require a jack and which has a space requirement and as low a dead weight as possible.
  • the binding according to the invention is defined in claim 1.
  • the play is automatically caught up by a slight displacement of the ramps one on the other under the effect of the locking means exerting a permanent pressure in the direction of the engagement of the projections in each other.
  • the protrusions can be formed very close to the points of articulation of the end piece, on the one hand, and of the tool, on the other hand, which makes it possible not only to reduce the size of the fixing, but also reduce the distances between the articulation axes of the end piece and the tool, which results in better use of forces.
  • the dead weight of the fastening means is also reduced to a minimum.
  • the locking member may consist of a simple transverse bar retained by a tie rod.
  • FIG. 1 is a partial view, in photographic perspective, of the end of a construction machine arm and of a bucket intended to be fixed at this end.
  • FIG. 1 shows the same elements being fixed.
  • Figure 3 is a detail view showing the elements of Figure 2 in the direction of arrow A, after full engagement of the profiled parts.
  • Figure 4 is a perspective view of the locking and pressure means.
  • Figure 5 is a detail view of Figure 3, from a slightly different angle, after installation of the locking means.
  • Figure 6 shows, by way of example, the attachment of another tool, in this case a hydraulic hammer.
  • Figure 7 shows a second embodiment of the locking means.
  • Figures 1 and 2 show the end piece 1 hinged to the end of a conventional construction machine arm.
  • This end piece 1 is articulated, in a known manner, on the one hand, at the end of an arm 2 by means of an axis 3 and, on the other hand, to two connecting rods 4 and 5 by means of a axis 6, the connecting rods 4 and 5 being articulated themselves to the arm 2 by two connecting rods 7 and 8 ( Figure 6) and at the end of a hydraulic cylinder 9 in a conventional manner.
  • the end piece 1 has a rectangular front planar face 10 parallel to the axes 3 and 6. This face can be cut to reduce the weight of the end piece 1.
  • Each of the side faces of the end piece 1 is provided with two lateral projections 11 and 12 in the shape of a right triangle whose long side is in the plane of the front face 10. Each projection therefore defines a ramp such that the ramps 13 and 14 visible in FIGS. 1 and 2 and the ramps 15 and 16 of the two visible opposite projections in Figure 6.
  • the tool in this case a bucket 17, has two parallel ribs 18 and 19 whose spacing corresponds to the width of the end piece 1. These ribs are each provided with two projections 20, 21 and 22, 23 directed towards interior and also presenting ramps such as 24 and 25 whose inclination relative to the flat face 26 of the tool is identical to the inclination of the ramps 13 and 16 relative to the front face 10 of the end piece 1. The distance between the ramps the same pair is greater than the length of the projections 11 and 15 so as to allow the passage of these projections 11 and 15 between the projections 20 and 21. It should also be noted that the ramps 24 of the anterior projections 20 of the tool 17 are cut by a chamfer 27 and that the lateral faces opposite the corresponding projections 20 have a boss 28.
  • the end piece 1 also has, near its front face 10, a hole 29 parallel to the front face.
  • the ribs 18 and 19 of the tool 17 have two opposite rectangular holes 30 and 31 used, with the threaded hole 29 for locking the fixing, as will be described later.
  • the central part 32 carries a screw 37 intended to exert a prestress on the locking device.
  • the fixing takes place as follows: The bucket 17 being placed on the ground, the end piece 1 is engaged between the ribs 18 and 19 of the bucket 17, first of all perpendicular to the face 26 of the bucket, the projections 13 and 15 engaging between the projections 20 and 21, and, respectively 22 and 23, then substantially parallel to the plane 26, in the direction of the arrow F, as shown in FIG. 2.
  • the bosses 28 (FIG. 1) have the effect of eliminating the lateral play of the end piece 1 in the tool.
  • the locking and pressure device is then put in place by introducing the end of the arms 33 and 34 into the holes 30 and 31 of the cup 17 and by engaging the screw 37 through the hole 29 of the end piece and a screw is screwed. nut at the protruding end 1, as shown in FIG. 5.
  • the screw 37 is then driven by its head 38 while maintaining the nut by means of a second key, which has the effect to tension the locking and pressure device to bring it into a position as shown in phantom in Figure 5.
  • the arms 33 and 34 are braced in the holes 30 and 31 by exerting their bosses 35 and 36 a pressure on the end piece 1, in the direction of arrow F, Figure 2.
  • the locking device not only has the effect of keeping hooked the end piece 1 and the bucket 17, but also to maintain a permanent tension tending to apply the bucket 17 against the end piece 1. Because of this tension and the ramps of the hooking projections, any play due to wear is automatically taken up, so that the fastener remains perfectly rigid. Note, particularly in Figure 3, that the fixing is carried out very close to the axes 3 and 6, so that the torques exerted on the axes 3 and 6 are reduced to the minimum.
  • the binding is particularly compact.
  • FIG. 6 shows, by way of example, the attachment of a hydraulic hammer 40.
  • This hammer is provided with a female part 41 identical to the female part of the bucket 17.
  • the hammer 40 is placed on a log 42 so as to be able to engage the bottom piece 1 with its male profiles from below. Once fully engaged, the terminal part 1 lifts the hammer and it is then possible to set up the locking device.
  • the locking device undergoes only relatively very small forces. They are lower the lower the slope of the attachment ramps.
  • the corner effect of the projections can be such that the fixing is practically ensured by these projections alone. In this case, to remove the tool, it is necessary to strike the end piece 1 using the clearance 27.
  • the locking of the tool on the end piece can be ensured by means other than those shown in FIGS. 4 and 5. Another embodiment of the locking means will be described, by way of example, by means of the figure 7.
  • the locking means shown in Figure 7 consist of a transverse bar 43 at least the ends of which have a wedge-shaped profile and are engaged in two V-shaped notches 44 and 45 formed in the parallel ribs 18 and 19 of the tool 17, in the occurrence a bucket.
  • the bar 43 has a hole for the passage of a prestressing tie rod articulated at a point 47 on the end piece 1 and onto which is screwed a nut 48 intended to maintain a certain pressure on the bar 43.
  • This bar presses against the two inclined ends 49 and 50 on both sides of the end piece 1.
  • the wedge effect maintains pressure in the direction of the arrow. This execution is particularly simple and robust.
  • the bar 43 could bear against the lateral projections 11 and 12 of the end piece.
  • the locking means consists of a pair of pawls slidably mounted in a transverse groove of the end piece 1 and coming to engage by an oblique flank in two housings provided in the parallel ribs 18 and 19 of the tool, a spring and / or a cylinder being provided between the pawls, on the one hand, to exert a permanent axial pressure on the pawls and, on the other hand, to disengage the pawls from their housings for the separation of the tool and the end piece.
  • the cylinder can be single acting or double acting.
  • the invention is of course not limited to the embodiments shown.
  • the number and the shape of the projections could be different.
  • the projections of one of the parts to be assembled may not have ramps and have, for example, a circular or semi-circular profile or more or less rounded.

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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)
  • Agricultural Machines (AREA)
  • Shovels (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Soil Working Implements (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Earth Drilling (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)

Abstract

The connection is made by the engagement of profiled parts (11, 12) of the end piece (1) of the arm of the machine between one face (26) of the tool and corresponding profiled parts (20, 21) of the tool. The profiled parts have ramps and are kept engaged by a locking means exerting a transverse pressure in such a way that the play is taken up automatically. The connection is compact and advantageous in mechanical terms. <IMAGE>

Description

La présente invention a pour objet une fixation d'un outil à l'extrémité d'un bras de machine de chantier muni d'une pièce terminale articulée destinée à recevoir l'outil, dans laquelle la pièce terminale est munie de deux paires de saillies profilées présentant chacune une rampe inclinée dans la direction de l'engagement de la pièce terminale dans l'outil, les saillies de la pièce terminale venant s'engager sous deux paires de saillies correspondantes, également munies de rampes de l'outil, les rampes de la pièce terminale venant prendre appui sur les rampes de l'outil, lors de l'engagement de la pièce terminale dans l'outil, les rampes de l'outil présentant relativement à l'outil une inclinaison identique à celle des rampes de la pièce terminale relativement à la pièce terminale, la fixation comportant un organe de verrouillage de la pièce terminale sur l'outil, que la paire de saillies profilées de la pièce terminale sont formées sur deux faces latérales parallèles de la pièce terminale, que les paires de saillies de l'outil sont formées sur les flancs de deux nervures parallèles dont l'écartement correspond à la largeur de la pièce terminale et que la fixation comprend en outre des moyens mécaniques maintenant une précontrainte sur l'organe de verrouillage, cette précontrainte maintenant sur la pièce terminale une poussée dans le sens de l'engagement de la pièce terminale dans l'outil de manière à maintenir la pièce terminale appliquée contre l'outil.The object of the present invention is to fix a tool at the end of a site machine arm provided with an articulated end piece intended to receive the tool, in which the end piece is provided with two pairs of projections profiles each having a ramp inclined in the direction of engagement of the end piece in the tool, the projections of the end piece engaging under two pairs of corresponding projections, also provided with tool ramps, the ramps of the end piece coming to bear on the ramps of the tool, during the engagement of the end piece in the tool, the ramps of the tool having relative to the tool an inclination identical to that of the ramps of the end piece relative to the end piece, the fixing comprising a locking member of the end piece on the tool, that the pair of profiled projections of the end piece are formed on two lateral faces parallel to the end piece, that the pairs of protrusions of the tool are formed on the sides of two parallel ribs, the spacing of which corresponds to the width of the end piece, and that the fixing also comprises mechanical means maintaining a prestress on the locking member, this preload now pushing on the end piece in the direction of engagement of the end piece in the tool so as to keep the end piece applied against the tool.

Une telle fixation est connue du DE-U-90 00 721. La pièce terminale est munie de deux paires de saillies en forme de crochets pénétrant par des découpes dans le fond de l'outil pour s'engager, par déplacement vers l'avant, sous des rampes prévues sur la face intérieure du fond de l'outil. Un verrouillage de la fixation est assuré par des verrous engagés dans les découpes traversées par la paire de crochets antérieurs. Ces verrous sont engagés avec jeu entre les crochets et les découpes et n'ont donc qu'une fonction de sécurité. Un léger recul de la pièce terminale relativement à l'outil peut se produire notamment chaque fois que l'outil est utilisé en râcloir. Ce jeu se traduit par des chocs violents sur les crochets de fixation, chocs susceptibles d'entraîner la rupture de l'attache des crochets à la pièce terminale.Such attachment is known from DE-U-90 00 721. The end piece is provided with two pairs of projections in the form of hooks penetrating by cutouts in the bottom of the tool to engage, by moving forward, under ramps provided on the inside of the bottom of the tool. The attachment is locked by latches engaged in the cutouts through which the pair of front hooks pass. These locks are engaged with play between the hooks and the cutouts and therefore have only a safety function. A slight setback of the end piece relative to the tool can occur in particular each time the tool is used in a scraper. This play results in violent shocks on the fixing hooks, shocks likely to cause the breakage of the hook attachment to the end piece.

On connaît également une fixation, sans goupille amovible, réalisée, d'une part, par deux tenons cylindriques venant s'engager dans deux crochets en arc de cercle de l'autre pièce et, d'autre part, par un accrochage à effet de coin assuré par des cales. Un jeu existe au niveau des tenons. Ce jeu peut augmenter avec le temps sous l'effet de l'usure.There is also known a fixing, without removable pin, produced, on the one hand, by two cylindrical tenons coming to engage in two hooks in an arc of a circle of the other part and, on the other hand, by a hooking effect of corner provided by wedges. A game exists at the stud level. This play can increase over time due to wear.

Du document WO-A-8504917, on connaît une fixation dans laquelle la pièce terminale et l'outil sont munis de saillies présentant des rampes par lesquelles la pièce terminale et l'outil sont engagés et fixés l'un dans l'autre. La face de l'outil en regard de la pièce terminale présente deux saillies transversales munies de rampes opposées et en regard l'une de l'autre définissant un profil en queue d'aronde, tandis que la pièce terminale présente une saillie transversale homologue de la saillie postérieure de l'outil et deux pièces mobiles sur des guides obliques venant s'engager sous la rampe de la saillie antérieure de l'outil pour fixer l'ensemble. Cette construction permet de rattraper automatiquement le jeu dû à l'usure, mais la disposition des saillies de l'outil nécessite obligatoirement l'utilisation de pièces mobiles sur la pièce terminale et d'un vérin pour actionner ces pièces mobiles, ce qui complique la construction de la fixation et en limite les possibilités d'utilisation, beaucoup de machines n'étant pas équipées de moyens d'alimentation d'un vérin sur la pièce terminale. La construction est encore compliquée par les moyens nécessaires au maintien solide des pièces mobiles à la pièce terminale, tout ceci se traduisant par un poids. mort important. Enfin, une défaillance du vérin peut entraîner la chute de l'outilDocument WO-A-8504917 discloses a fixing in which the end piece and the tool are provided with projections having ramps by which the end piece and the tool are engaged and fixed one inside the other. The face of the tool opposite the workpiece terminal has two transverse projections provided with opposite ramps and facing one another defining a dovetail profile, while the terminal part has a transverse projection homologous to the rear projection of the tool and two moving parts on oblique guides coming to engage under the ramp of the anterior projection of the tool to fix the assembly. This construction makes it possible to automatically make up for the play due to wear, but the arrangement of the projections of the tool necessarily requires the use of moving parts on the end piece and of a jack to actuate these moving parts, which complicates the construction of the binding and limits the possibilities of use, many machines not being equipped with means for feeding a jack to the end piece. The construction is further complicated by the means necessary to securely hold the moving parts to the terminal part, all of this resulting in weight. important death. Finally, a cylinder failure can cause the tool to fall

La présente invention a pour but de réaliser une fixation sûre, à rattrapage automatique de jeu, ne nécessitant pas de vérin et présentant un encombrement et un poids mort aussi réduit que possible.The object of the present invention is to provide a secure fastening, with automatic backlash, which does not require a jack and which has a space requirement and as low a dead weight as possible.

La fixation selon l'invention est définie à la revendication 1.The binding according to the invention is defined in claim 1.

Le jeu est automatiquement rattrapé par un léger déplacement des rampes les unes sur les autres sous l'effet des moyens de verrouillage exerçant une pression permanente dans la direction de l'engagement des saillies les unes dans les autres.The play is automatically caught up by a slight displacement of the ramps one on the other under the effect of the locking means exerting a permanent pressure in the direction of the engagement of the projections in each other.

Les saillies peuvent être formées très près des points d'articulation de la pièce terminale, d'une part, et de l'outil, d'autre part, ce qui permet non seulement de réduire l'encombrement de la fixation, mais en outre de réduire les distances entre les axes d'articulation de la pièce terminale et l'outil, ce qui a pour conséquence une meilleure utilisation des efforts. Le poids mort des moyens de fixation est en outre réduit au mimimum.The protrusions can be formed very close to the points of articulation of the end piece, on the one hand, and of the tool, on the other hand, which makes it possible not only to reduce the size of the fixing, but also reduce the distances between the articulation axes of the end piece and the tool, which results in better use of forces. The dead weight of the fastening means is also reduced to a minimum.

L'organe de verrouillage peut être constitué d'une simple barre transversale retenue par un tirant.The locking member may consist of a simple transverse bar retained by a tie rod.

Le dessin annexé représente, à titre d'exemple, une forme d'exécution de l'invention.The accompanying drawing shows, by way of example, an embodiment of the invention.

La figure 1 est une vue partielle, en perspective photographique, de l'extrémité d'un bras de machine de chantier et d'un godet destiné à être fixé à cette extrémité.FIG. 1 is a partial view, in photographic perspective, of the end of a construction machine arm and of a bucket intended to be fixed at this end.

La figure 2 représente les mêmes éléments en cours de fixation.Figure 2 shows the same elements being fixed.

La figure 3 est une vue de détail montrant les éléments de la figure 2 dans la direction de la flèche A, après engagement complet des parties profilées.Figure 3 is a detail view showing the elements of Figure 2 in the direction of arrow A, after full engagement of the profiled parts.

La figure 4 est une vue en perspective des moyens de verrouillage et de pression.Figure 4 is a perspective view of the locking and pressure means.

La figure 5 est une vue de détail de la figure 3, sous un angle un peu différent, après mise en place des moyens de verrouillage.Figure 5 is a detail view of Figure 3, from a slightly different angle, after installation of the locking means.

La figure 6 représente, à titre d'exemple, la fixation d'un autre outil, en l'occurrence un marteau hydraulique.Figure 6 shows, by way of example, the attachment of another tool, in this case a hydraulic hammer.

La figure 7 représente une deuxième forme d'exécution des moyens de verrouillage.Figure 7 shows a second embodiment of the locking means.

Les figures 1 et 2 montrent la pièce terminale 1 articulée à l'extrémité d'un bras de machine de chantier conventionnelle. Cette pièce terminale 1 est articulée, de manière connue, d'une part, à l'extrémité d'un bras 2 au moyen d'un axe 3 et, d'autre part, à deux bielles 4 et 5 au moyen d'un axe 6, les bielles 4 et 5 étant articulées elles-mêmes au bras 2 par deux bielles 7 et 8 (figure 6) ainsi qu'à l'extrémité d'un vérin hydraulique 9 de manière conventionnelle.Figures 1 and 2 show the end piece 1 hinged to the end of a conventional construction machine arm. This end piece 1 is articulated, in a known manner, on the one hand, at the end of an arm 2 by means of an axis 3 and, on the other hand, to two connecting rods 4 and 5 by means of a axis 6, the connecting rods 4 and 5 being articulated themselves to the arm 2 by two connecting rods 7 and 8 (Figure 6) and at the end of a hydraulic cylinder 9 in a conventional manner.

La pièce terminale 1 présente une face plane frontale rectangulaire 10 parallèle aux axes 3 et 6. Cette face peut être découpée pour diminuer le poids de la pièce terminale 1. Chacune des faces latérales de la pièce terminale 1 est munie de deux saillies latérales 11 et 12 en forme de triangle rectangle dont le grand côté est dans le plan de la face frontale 10. Chaque saillie définit donc une rampe telle que les rampes 13 et 14 visibles aux figures 1 et 2 et les rampes 15 et 16 des deux saillies opposées visibles à la figure 6.The end piece 1 has a rectangular front planar face 10 parallel to the axes 3 and 6. This face can be cut to reduce the weight of the end piece 1. Each of the side faces of the end piece 1 is provided with two lateral projections 11 and 12 in the shape of a right triangle whose long side is in the plane of the front face 10. Each projection therefore defines a ramp such that the ramps 13 and 14 visible in FIGS. 1 and 2 and the ramps 15 and 16 of the two visible opposite projections in Figure 6.

L'outil, en l'occurrence un godet 17, présente deux nervures parallèles 18 et 19 dont l'écartement correspond à la largeur de la pièce terminale 1. Ces nervures sont munies chacune de deux saillies 20, 21 et 22, 23 dirigées vers l'intérieur et présentant également des rampes telles que 24 et 25 dont l'inclinaison relativement à la face plane 26 de l'outil est identique à l'inclinaison des rampes 13 et 16 relativement à la face frontale 10 de la pièce terminale 1. La distance entre les rampes d'une même paire est supérieure à la longueur des saillies 11 et 15 de manière à permettre le passage de ces saillies 11 et 15 entre les saillies 20 et 21. Il convient en outre de signaler que les rampes 24 des saillies antérieures 20 de l'outil 17 sont coupées par un chanfrein 27 et que les faces latérales en regard des saillies correspondantes 20 présentent un bossage 28.The tool, in this case a bucket 17, has two parallel ribs 18 and 19 whose spacing corresponds to the width of the end piece 1. These ribs are each provided with two projections 20, 21 and 22, 23 directed towards interior and also presenting ramps such as 24 and 25 whose inclination relative to the flat face 26 of the tool is identical to the inclination of the ramps 13 and 16 relative to the front face 10 of the end piece 1. The distance between the ramps the same pair is greater than the length of the projections 11 and 15 so as to allow the passage of these projections 11 and 15 between the projections 20 and 21. It should also be noted that the ramps 24 of the anterior projections 20 of the tool 17 are cut by a chamfer 27 and that the lateral faces opposite the corresponding projections 20 have a boss 28.

La pièce terminale 1 présente en outre, près de sa face frontale 10, un trou 29 parallèle à la face frontale. De son côté, les nervures 18 et 19 de l'outil 17 présentent deux trous rectangulaires opposés 30 et 31 utilisés, avec le trou fileté 29 pour le verrouillage de la fixation, comme ceci sera décrit plus loin.The end piece 1 also has, near its front face 10, a hole 29 parallel to the front face. For its part, the ribs 18 and 19 of the tool 17 have two opposite rectangular holes 30 and 31 used, with the threaded hole 29 for locking the fixing, as will be described later.

Le dispositif de verrouillage, représenté à la figure 4 comprend une pièce centrale 32 en forme de chape sur laquelle sont articulés deux bras 33 et 34 légèrement recourbés à leur extrémité et présentant un bossage 35, respectivement 36 dont le rôle de came sera décrit plus loin. La pièce centrale 32 porte une vis 37 destinée à exercer une précontrainte sur le dispositif de verrouillage.The locking device, shown in Figure 4 comprises a central piece 32 in the form of a yoke on which are articulated two arms 33 and 34 slightly bent at their end and having a boss 35, respectively 36 whose role of cam will be described later . The central part 32 carries a screw 37 intended to exert a prestress on the locking device.

La fixation s'opère de la manière suivante : Le godet 17 étant posé sur le sol, la pièce terminale 1 est engagée entre les nervures 18 et 19 du godet 17, tout d'abord perpendiculairement à la face 26 du godet, les saillies 13 et 15 s'engageant entre les saillies 20 et 21, et, respectivement 22 et 23, puis sensiblement parallèlement au plan 26, dans le sens de la flèche F, comme représenté à la figure 2. Les saillies 11 et 12, ainsi que les saillies opposées, viennent s'engager sous les saillies correspondantes du godet 17. Sous l'action des rampes 13 à 16 et des rampes correspondantes des saillies du godet 17, ce dernier est appliqué contre la face frontale 10 de la pièce terminale 1. Les bossages 28 (figure 1) ont pour effet de supprimer le jeu latéral de la pièce terminale 1 dans l'outil.The fixing takes place as follows: The bucket 17 being placed on the ground, the end piece 1 is engaged between the ribs 18 and 19 of the bucket 17, first of all perpendicular to the face 26 of the bucket, the projections 13 and 15 engaging between the projections 20 and 21, and, respectively 22 and 23, then substantially parallel to the plane 26, in the direction of the arrow F, as shown in FIG. 2. The projections 11 and 12, as well as the opposite projections, engage under the corresponding projections of the bucket 17. Under the action of the ramps 13 to 16 and of the corresponding ramps of the projections of the bucket 17, the latter is applied against the front face 10 of the end piece 1. The bosses 28 (FIG. 1) have the effect of eliminating the lateral play of the end piece 1 in the tool.

On met en place ensuite le dispositif de verrouillage et de pression en introduisant l'extrémité des bras 33 et 34 dans les trous 30 et 31 du godet 17 et en engageant la vis 37 à travers le trou 29 de la pièce terminale et on visse un écrou à l'extrémité dépassante 1, comme représenté à la figure 5. Au moyen d'une première clé on entraîne ensuite la vis 37 par sa tête 38 en maintenant l'écrou au moyen d'une seconde clé, ce qui a pour effet de tendre le dispositif de verrouillage et de pression pour l'amener dans une position telle que représentée en traits mixtes à la figure 5. Lors de cette tension les bras 33 et 34 s'arc-boutent dans les trous 30 et 31 en exerçant par leurs bossages 35 et 36 une pression sur la pièce terminale 1, dans le sens de la flèche F, figure 2. Le dispositif de verrouillage a non seulement pour effet de maintenir accrochés la pièce terminale 1 et le godet 17, mais également de maintenir une tension permanente tendant à appliquer le godet 17 contre la pièce terminale 1. En raison de cette tension et des rampes des saillies d'accrochage, tout jeu dû à l'usure est automatiquement rattrapé, de sorte que l'attache reste parfaitement rigide. On remarque, particulièrement à la figure 3, que la fixation est réalisée très près des axes 3 et 6, de telle sorte que les couples exercés sur les axes 3 et 6 sont réduits au mimimum. La fixation est particulièrement compacte.The locking and pressure device is then put in place by introducing the end of the arms 33 and 34 into the holes 30 and 31 of the cup 17 and by engaging the screw 37 through the hole 29 of the end piece and a screw is screwed. nut at the protruding end 1, as shown in FIG. 5. By means of a first key, the screw 37 is then driven by its head 38 while maintaining the nut by means of a second key, which has the effect to tension the locking and pressure device to bring it into a position as shown in phantom in Figure 5. At this tension the arms 33 and 34 are braced in the holes 30 and 31 by exerting their bosses 35 and 36 a pressure on the end piece 1, in the direction of arrow F, Figure 2. The locking device not only has the effect of keeping hooked the end piece 1 and the bucket 17, but also to maintain a permanent tension tending to apply the bucket 17 against the end piece 1. Because of this tension and the ramps of the hooking projections, any play due to wear is automatically taken up, so that the fastener remains perfectly rigid. Note, particularly in Figure 3, that the fixing is carried out very close to the axes 3 and 6, so that the torques exerted on the axes 3 and 6 are reduced to the minimum. The binding is particularly compact.

Ce mode de fixation peut être bien entendu appliqué à tout type d'outil. La figure 6 représente, à titre d'exemple, la fixation d'un marteau hydraulique 40. Ce marteau est muni d'une partie femelle 41 identique à la partie femelle du godet 17. Pour sa fixation à la machine de chantier, le marteau 40 est posé sur un madrier 42 de manière à pouvoir engager par le bas la pièce terminale 1 avec ses profils mâles. Une fois engagée à fond, la partie terminale 1 soulève le marteau et il est alors possible de mettre en place le dispositif de verrouillage.This method of attachment can of course be applied to any type of tool. FIG. 6 shows, by way of example, the attachment of a hydraulic hammer 40. This hammer is provided with a female part 41 identical to the female part of the bucket 17. For its attachment to the construction machine, the hammer 40 is placed on a log 42 so as to be able to engage the bottom piece 1 with its male profiles from below. Once fully engaged, the terminal part 1 lifts the hammer and it is then possible to set up the locking device.

Il convient de souligner que le dispositif de verrouillage ne subit que des efforts relativement très faibles. Ils sont d'autant plus faibles que la pente des rampes d'accrochage est faible. L'effet de coin des saillies peut être tel que la fixation est pratiquement assurée par ces seules saillies. Dans ce cas, pour enlever l'outil, il est nécessaire de frapper sur la pièce terminale 1 en utilisant le dégagement 27.It should be emphasized that the locking device undergoes only relatively very small forces. They are lower the lower the slope of the attachment ramps. The corner effect of the projections can be such that the fixing is practically ensured by these projections alone. In this case, to remove the tool, it is necessary to strike the end piece 1 using the clearance 27.

Le verrouillage de l'outile sur la pièce terminale peut être assuré par d'autres moyens que ceux représentés aux figures 4 et 5. Une autre forme d'exécution des moyens de verrouillage sera décrite, à titre d'exemple, au moyen de la figure 7.The locking of the tool on the end piece can be ensured by means other than those shown in FIGS. 4 and 5. Another embodiment of the locking means will be described, by way of example, by means of the figure 7.

Pour des raisons de simplification, la pièce terminale et l'outil ont été désignés par les mêmes références 1 et 17 que dans les figures précédentes, même si ces éléments présentent des différences de forme et de dimension.For reasons of simplification, the end piece and the tool have been designated by the same references 1 and 17 as in the previous figures, even if these elements have differences in shape and size.

Les moyens de verrouillage représentés à la figure 7 sont constitués d'une barre transversale 43 dont au moins les extrémités présentent un profil en forme de coin et sont engagées dans deux encoches 44 et 45 en forme de V formées dans les nervures parallèles 18 et 19 de l'outil 17, en l'occurrence un godet. En son milieu, la barre 43 présente un trou pour le passage d'un tirant 46 de précontrainte articulé en un point 47 sur la pièce terminale 1 et sur lequel vient se visser un écrou 48 destiné à maintenir une certaine pression sur la barre 43. Cette barre s'appuie contre les deux extrémités inclinées 49 et 50 des deux côtés de la pièce terminale 1. L'effet de coin maintient une pression dans le sens de la flèche. Cette exécution est particulièrement simple et robuste. La barre 43 pourrait s'appuyer contre les saillies latérales 11 et 12 de la pièce terminale.The locking means shown in Figure 7 consist of a transverse bar 43 at least the ends of which have a wedge-shaped profile and are engaged in two V-shaped notches 44 and 45 formed in the parallel ribs 18 and 19 of the tool 17, in the occurrence a bucket. In the middle, the bar 43 has a hole for the passage of a prestressing tie rod articulated at a point 47 on the end piece 1 and onto which is screwed a nut 48 intended to maintain a certain pressure on the bar 43. This bar presses against the two inclined ends 49 and 50 on both sides of the end piece 1. The wedge effect maintains pressure in the direction of the arrow. This execution is particularly simple and robust. The bar 43 could bear against the lateral projections 11 and 12 of the end piece.

Selon une forme d'exécution non représentée, le moyen de verrouillage est constitué d'un paire de cliquets montés coulissants dans une rainure transversale de la pièce terminale 1 et venant s'engager par un flanc oblique dans deux logements prévus dans les nervures parallèles 18 et 19 de l'outil, un ressort et/ou un vérin étant prévu entre les cliquets, d'une part, pour exercer une pression axiale permanente sur les cliquets et, d'autre part, pour dégager les cliquets de leurs logements pour la séparation de l'outil et de la pièce terminale. Le vérin peut être à simple effet ou à double effet.According to an embodiment not shown, the locking means consists of a pair of pawls slidably mounted in a transverse groove of the end piece 1 and coming to engage by an oblique flank in two housings provided in the parallel ribs 18 and 19 of the tool, a spring and / or a cylinder being provided between the pawls, on the one hand, to exert a permanent axial pressure on the pawls and, on the other hand, to disengage the pawls from their housings for the separation of the tool and the end piece. The cylinder can be single acting or double acting.

L'invention n'est bien entendu pas limitée aux formes d'exécution représentées. En particulier, le nombre et la forme des saillies pourraient être différents. Les saillies de l'une des pièces à assembler pourraient ne pas présenter de rampes et avoir, par exemple, un profil circulaire ou semi-circulaire ou plus ou moins arrondi.The invention is of course not limited to the embodiments shown. In particular, the number and the shape of the projections could be different. The projections of one of the parts to be assembled may not have ramps and have, for example, a circular or semi-circular profile or more or less rounded.

Claims (6)

  1. Connection of a tool at the end of an earth-moving machine or the like having a jib equipped with an articulated end piece (1) intended to receive the tool (17), wherein the end piece is provided with two pairs of profiled parts (11, 12) having each a ramp (13, 14, 15, 16) inclined in the direction of engagement of the end piece into the tool (17), the profiled parts of the end piece engaging under two pairs of corresponding profiled parts (20, 21, 22, 23), also having ramps (13, 16), of the tool, the ramps of the end piece applying on the ramps of the tool when the end piece is engaged into the tool, the ramps (13, 16) of the tool having, with respect to the tool, the same slope as that of the ramps (13, 14, 15, 16) of the end piece, the connection comprising a locking member (32, 33, 34; 43) for locking the end piece on the tool, characterized by the fact that the pair of profiled parts (11, 12) of the end piece (1) are formed on two lateral faces of the end piece, that the pairs of profiled parts (20, 21, 22, 23) of the tool are formed on the flanks of two parallel ribs (18, 19) which are spaced apart by a distance corresponding to the width of the end piece and that the connection further comprises mechanical means (37; 46, 48, 44, 45) maintaining a prestress on the locking member, said prestress maintaining on the end piece a thrust in the direction (F) of the engagement of the end piece into the tool in order to maintain the end piece applied against the tool.
  2. Connection as claimed in claim 1, characterized by the fact that the locking member consists of a central piece (32) equipped with two arms (33, 34), the ends of which each engage in a housing (30, 31) of the tool and bear, in addition, by way of an intermediate boss in the form of a cam (35, 36), against said end piece (1), the central piece furthermore being equipped with a tie rod (37) which engages with the end piece in order to exert a tension on the central piece of the locking means.
  3. Connection as claimed in claim 1, characterized by the fact that said locking member consists of a transverse bar (43) having, at least at its ends, a wedge-shaped profile which engages in two notches (44, 45) provided in said parallel ribs (18, 19), in such a way that said bar bears against the end piece, and the lateral projections of this piece respectively, and that the mechanical prestress means consists of a tie rod (46) attached to the end piece and tending to pull said bar in the direction of the bottom of the notches.
  4. Connection as claimed in claim 1, characterized by the fact that said locking member consists of a pair of catches mounted so as to slide in a transverse groove of the end piece (1) and engaging with an oblique flank in two housings provided in said parallel ribs (18, 19), the prestress means being provided between the catches in order to exert a permanent axial pressure on the catches.
  5. Connection as claimed in claim 4, characterized by the fact that the means for exerting a pressure on the catches consists of a spring working under compression between the catches, mechanical means being provided for compressing the spring in order to free the catches.
  6. Connection as claimed in claim 4, characterized by the fact that the means for exerting a pressure on the catches consists of an hydraulical or pneumatical double-acting jack.
EP91810540A 1990-07-18 1991-07-09 Connection of a tool to an arm of an excavating machine Expired - Lifetime EP0467837B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/174,383 US5394630A (en) 1990-07-18 1993-12-27 Device for mounting a tool at the end of a construction-machine jib

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2388/90A CH683541A5 (en) 1990-07-18 1990-07-18 Fixing a tool at the end of a construction machine arm.
CH2388/90 1990-07-18

Publications (2)

Publication Number Publication Date
EP0467837A1 EP0467837A1 (en) 1992-01-22
EP0467837B1 true EP0467837B1 (en) 1995-05-24

Family

ID=4232620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810540A Expired - Lifetime EP0467837B1 (en) 1990-07-18 1991-07-09 Connection of a tool to an arm of an excavating machine

Country Status (8)

Country Link
EP (1) EP0467837B1 (en)
JP (1) JPH0814115B2 (en)
AT (1) ATE123096T1 (en)
CH (1) CH683541A5 (en)
DE (1) DE69109950T2 (en)
DK (1) DK0467837T3 (en)
ES (1) ES2073150T3 (en)
GR (1) GR3017205T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH687774A5 (en) * 1993-01-26 1997-02-14 Etienne Moinat Fixing a tool at the end of a construction machine arm.
US10458094B2 (en) * 2016-06-23 2019-10-29 Adam Weaver Versatile connector for excavator tools

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1408271A (en) * 1964-06-30 1965-08-13 Venissieux Atel Improvements to the joints of hydraulic excavator tools on the operating arms and connecting rods
US3556323A (en) * 1968-12-23 1971-01-19 Damian M Heimmermann Quick-connect coupler for bucket on excavating machine
FR2475160A1 (en) * 1980-01-31 1981-08-07 Pingon Pierre De AUTOMATIC TOOL HOLDING DEVICE FOR EXCAVATOR, LOADER, EARTHMOVING MACHINE OR THE LIKE
SE458939B (en) * 1984-04-24 1989-05-22 Bengt Karlsson QUICK FAST FOR WORKING TOOL
US4545720A (en) * 1984-05-17 1985-10-08 J. I. Case Company Quick coupler assembly
JPS6443090A (en) * 1987-08-07 1989-02-15 Copal Electronics Pwm control of miniature brushless dc motor
DE9000721U1 (en) * 1990-01-24 1990-03-01 Nagler, Jürgen, 5804 Herdecke Quick coupling of a work attachment on excavators

Also Published As

Publication number Publication date
ATE123096T1 (en) 1995-06-15
CH683541A5 (en) 1994-03-31
ES2073150T3 (en) 1995-08-01
GR3017205T3 (en) 1995-11-30
JPH0814115B2 (en) 1996-02-14
EP0467837A1 (en) 1992-01-22
JPH06167032A (en) 1994-06-14
DK0467837T3 (en) 1995-10-02
DE69109950T2 (en) 1996-01-11
DE69109950D1 (en) 1995-06-29

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