EP0810330B1 - Device for connecting a tool to the end of an arm of an excavator - Google Patents
Device for connecting a tool to the end of an arm of an excavator Download PDFInfo
- Publication number
- EP0810330B1 EP0810330B1 EP97400869A EP97400869A EP0810330B1 EP 0810330 B1 EP0810330 B1 EP 0810330B1 EP 97400869 A EP97400869 A EP 97400869A EP 97400869 A EP97400869 A EP 97400869A EP 0810330 B1 EP0810330 B1 EP 0810330B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- stop
- axis
- arm
- shaft
- 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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Classifications
-
- 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 present invention relates to improvements to devices for attaching a tool to the end of the arm of a shovel mechanical or the like.
- a quick coupler has two parts, a first part, or hooking member, which is worn by the end of the arm and a second part which is rendered secured to the tool.
- the second part consists mainly of a tree, or by two pins, fixed relative to the tool.
- the first part which is articulated at the end of the arm, presents, in its form the simpler, a hook forming a semi-cylindrical cradle likely to be engaged on the tool shaft when the latter rests on the ground.
- Such a device is illustrated by that described in EP-A-438931.
- a device comprising, in its simplest form, a stop provided on the hooking member capable of cooperating, when the tool is locked, with a stop carried by the tool so as to object to the tool shaft tending to come out of its cradle.
- Each of the two abovementioned stops has a surface of contact formed by a portion of the surface of a straight cylinder with circular director whose axis coincides with that of the tree of the tool, the two surfaces being respectively convex and concave.
- the radius of the convex surface, corresponding to the stop carried by the tree is equal to that of the concave surface.
- the present invention which overcomes these drawbacks, is remarkable in that when the two stops cooperate in locking position, the axis of the fictitious cylinder on which the two contact surfaces of said stops are located is arranged in front of the shaft axis capable of being carried by the tool relative to the direction of rotation of the latching member when the latter pivots from the non-position locked in the locked position.
- the fixed stop that carried by the tree, is made in two parts assemblies, one of which has the contact surface, a shim inserted between the two said parts allowing the adjustment of the position of said contact surface.
- 1 is the end of the usual arm of a charger on which a tool such as a bucket should be attached.
- the representation of the bucket has been limited to the beam or shaft 2 carried by the bucket and constituting the edge of the opposite bucket teeth.
- the fastening member 3 is produced at by means of two identical hooks 4, joined by at least one crosspiece 5.
- Each hook has a semi-cylindrical cradle 6 receiving the shaft 2 of the tool.
- the attachment member 3 is articulated at the end of the arm 1 through an axis 7 and can pivot around said axis by through links 8 and 9 subjected to the action of a jack, the piston rod is shown at 10 in Figure 1.
- the shaft 2 has, at least, a stop 11 likely to cooperate, when the tool is locked (fig. 2), with a stop 12.
- the fixed stop 11 has a convex contact surface 14, located on a fictitious right cylinder C whose generatrices are parallel to axis 13.
- the stop 12 has a concave contact surface 15, located on a fictitious right cylinder C whose generatrices are parallel to axis 13.
- the two aforementioned cylinders have the same diameter and, when the member 3 is in the locked position (fig. 2 and 5), the axes of the two fictitious cylinders coincide. There is no play between the surfaces 14 and 15 and that's the ideal situation.
- the axis Ci of the cylinder comprising the surface 14 is offset relative to the axis 13 in the direction of rotation of the member 3 to move from the position of Figure 1 to that of the figure 2.
- the stop 11 is made in two parts 11a and 11b assembled with a wedge interposed 16. The assembly is carried out using countersunk screws whose axes are shown schematically in 17.
- This last device makes it possible to adapt the tool to the organ of attachment and to correct, in a final way, a defect of tool construction.
- the thickness of the shim 16 is increased and conversely otherwise.
Landscapes
- 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)
- Load-Engaging Elements For Cranes (AREA)
Abstract
Description
La présente invention est relative à des perfectionnements aux dispositifs pour fixer un outil à l'extrémité du bras d'une pelle mécanique ou analogue.The present invention relates to improvements to devices for attaching a tool to the end of the arm of a shovel mechanical or the like.
Actuellement, la fixation d'un outil, tel qu'un godet ou un marteau piqueur, s'effectue par l'entremise d'un dispositif dénommé "attache rapide". Un tel dispositif permet de fixer automatiquement l'outil sans que le conducteur de l'engin quitte sa cabine de commande.Currently, attaching a tool, such as a bucket or jackhammer, is carried out through a device called "quick coupler". Such a device makes it possible to fix the tool automatically without the operator of the machine leaving his control cabin.
D'une façon générale, une attache rapide comporte deux parties, une première partie, ou organe d'accrochage, qui est portée par l'extrémité du bras et une seconde partie qui est rendue solidaire de l'outil.Generally, a quick coupler has two parts, a first part, or hooking member, which is worn by the end of the arm and a second part which is rendered secured to the tool.
La seconde partie est principalement constituée par un arbre, ou par deux tourillons, fixe par rapport à l'outil. La première partie, qui est articulée à l'extrémité du bras, présente, dans sa forme la plus simple, un crochet formant un berceau semi-cylindrique susceptible d'être engagé sur l'arbre de l'outil lorsque ce dernier repose sur le sol. Par des rotations judicieuses tant du bras de l'engin que de l'organe d'accrochage par rapport audit bras, il est possible de verrouiller automatiquement l'outil par rapport audit bras.The second part consists mainly of a tree, or by two pins, fixed relative to the tool. The first part, which is articulated at the end of the arm, presents, in its form the simpler, a hook forming a semi-cylindrical cradle likely to be engaged on the tool shaft when the latter rests on the ground. By judicious rotations both of the arm of the object of the attachment member with respect to said arm, it is possible to automatically lock the tool against said audit arms.
Un tel dispositif est illustré par celui décrit dans EP-A-438931.Such a device is illustrated by that described in EP-A-438931.
Il ressort des explications ci-dessus, que le contact de l'arbre de l'outil avec l'organe d'accrochage s'effectue ,en fait, par l'entremise d'un palier ouvert. Lorsque les efforts sont alternés il se produit un phénomène de matage entre les surfaces en contact et les jeux qui en résultent détruisent rapidement l'attache rapide.It appears from the above explanations that the contact of the tool shaft with the latching member is in fact effected by through an open landing. When the efforts are alternated it a matting phenomenon occurs between the surfaces in contact and the resulting games quickly destroy the quick coupler.
Pour remédier à cet inconvénient, il a été réalisé un dispositif comportant, dans sa forme la plus simple, une butée prévue sur l'organe d'accrochage susceptible de coopérer, lorsque l'outil est verrouillé, avec une butée portée par l'outil de façon à s'opposer à ce que l'arbre de l'outil tende à sortir de son berceau.To remedy this drawback, a device comprising, in its simplest form, a stop provided on the hooking member capable of cooperating, when the tool is locked, with a stop carried by the tool so as to object to the tool shaft tending to come out of its cradle.
Un tel dispositif est illustré par celui décrit dans la demande de brevet européen EP-A-704577.Such a device is illustrated by that described in the application of European patent EP-A-704577.
Chacune des deux butées précitées présente une surface de contact constituée par une portion de la surface d'un cylindre droit à directrice circulaire dont l'axe est confondu avec celui de l'arbre de l'outil, les deux surfaces étant respectivement convexe et concave.Each of the two abovementioned stops has a surface of contact formed by a portion of the surface of a straight cylinder with circular director whose axis coincides with that of the tree of the tool, the two surfaces being respectively convex and concave.
Pour obtenir un bon maintien de l'arbre dans son berceau, il faut que le rayon de la surface convexe, correspondant à la butée portée par l'arbre, soit égal à celui de la surface concave.To obtain a good support of the tree in its cradle, it the radius of the convex surface, corresponding to the stop carried by the tree, is equal to that of the concave surface.
Cette condition d'égalité ne pose pas de problème lors de l'usinage des surfaces. Cependant, il résulte de l'expérience qu'il était très aléatoire de la maintenir. En effet, lors de la fixation de l'arbre au godet, par exemple, fixation s'effectuant par un procédé de soudage, ledit arbre a tendance à se déformer de façon permanente et aléatoire. De ce fait, deux défauts pouvaient se produire. Dans un premier cas, la butée de l'attache heurtait celle de l'arbre ou, dans un deuxième cas, un jeu trop important subsistait entre les deux butées à la fin du verrouillage en retirant toute efficacité au dispositif.This condition of equality is not a problem when surface machining. However, it follows from experience that was very random to maintain it. Indeed, when fixing the shaft to the bucket, for example, fixing is effected by a process welding, said shaft tends to deform so permanent and random. As a result, two faults could be produce. In a first case, the stop of the fastener struck that of the tree or, in a second case, too much play remained between the two stops at the end of locking by removing any efficiency to the device.
La présente invention, qui remédie à ces inconvénients, est remarquable en ce que, lorsque les deux butées coopèrent en position de verrouillage, l'axe du cylindre fictif sur lequel les deux surfaces de contact desdites butées sont situées est disposé en avant de l'axe de l'arbre susceptible d'être portée par l'outil par rapport au sens de rotation de l'organe d'accrochage lorsque celui-ci pivote de la position non verrouillée à la position verrouillée.The present invention, which overcomes these drawbacks, is remarkable in that when the two stops cooperate in locking position, the axis of the fictitious cylinder on which the two contact surfaces of said stops are located is arranged in front of the shaft axis capable of being carried by the tool relative to the direction of rotation of the latching member when the latter pivots from the non-position locked in the locked position.
Selon une autre caractéristique avantageuse de l'invention, la butée fixe, celle portée par l'arbre, est réalisée en deux parties assemblées dont l'une comporte la surface de contact, une cale intercalée entre les deux dites parties permettant d'ajuster la position de ladite surface de contact.According to another advantageous characteristic of the invention, the fixed stop, that carried by the tree, is made in two parts assemblies, one of which has the contact surface, a shim inserted between the two said parts allowing the adjustment of the position of said contact surface.
La présente invention sera mieux comprise par la description qui va suivre faite en se référant aux dessins annexés à titre d'exemple indicatif, seulement, sur lesquels :
- la figure 1 est une vue partielle, en élévation, montrant l'accrochage d'un outil à l'extrémité du bras d'un chargeur à l'aide d'une attache rapide comportant le dispositif de l'invention, la représentation de l'outil étant limitée à son arbre usuel;
- la figure 2 est une vue, analogue à celle 1, montrant l'ensemble en position verrouillée;
- les figures 3 à 5 sont des vues, partielles et à plus grande échelle, montrant les différentes positions de la butée mobile durant l'opération de verrouillage;
- la figure 6 est une vue, partielle et à plus grande échelle, limitée à la butée fixe et montrant une autre caractéristique de l'invention.
- Figure 1 is a partial view, in elevation, showing the attachment of a tool at the end of the arm of a loader using a quick coupler comprising the device of the invention, the representation of the the tool being limited to its usual shaft;
- Figure 2 is a view, similar to that 1, showing the assembly in the locked position;
- Figures 3 to 5 are views, partial and on a larger scale, showing the different positions of the movable stop during the locking operation;
- Figure 6 is a view, partial and on a larger scale, limited to the fixed stop and showing another characteristic of the invention.
Dans la description qui va suivre, il y a lieu de noter que l'invention est appliquée à une attache rapide du genre de celle décrite dans le brevet européen EP-A- 438931. De ce fait, les caractéristiques qui ne sont pas utiles à la compréhension de la présente invention n'ont pas été décrites ni représentées.In the description which follows, it should be noted that the invention is applied to a quick coupler like the one described in European patent EP-A-438931. As a result, the features that are not helpful in understanding the present invention have not been described or shown.
En se reportant aux dessins et selon un mode de réalisation, on voit que 1 est l'extrémité du bras usuel d'un chargeur sur lequel il convient de fixer un outil, tel qu'un godet.Referring to the drawings and according to one embodiment, we see that 1 is the end of the usual arm of a charger on which a tool such as a bucket should be attached.
Pour simplifier les dessins, la représentation du godet a été
limitée à la poutre ou arbre 2 portée par le godet et constituant le bord du godet opposé
aux dents.To simplify the drawings, the representation of the bucket has been
limited to the beam or
De la façon connue, l'organe d'accrochage 3 est réalisé au
moyen de deux crochets 4, identiques, réunis par au moins une
traverse 5. Chaque crochet présente un berceau 6 semi-cylindrique
de réception de l'arbre 2 de l'outil. In known manner, the fastening
L'organe d'accrochage 3 est articulé à l'extrémité du bras 1
par l'entremise d'un axe 7 et peut pivoter autour dudit axe par
l'entremise de biellettes 8 et 9 soumises à l'action d'un vérin dont
la tige de piston figure en 10 sur la figure 1.The
De la façon connue, l'arbre 2 présente, au moins, une butée 11
susceptible de coopérer, lorsque l'outil est verrouillé (fig.2), avec
une butée 12.In known manner, the
A ce stade de la description, il faut rappeler que, dans la
position représentée sur la figure 1, le bras 1 est fixe et maintient
l'outil soulevé par rapport au sol selon un mode de suspension
pendulaire. Lorsque, sous l'action du vérin, l'organe 3 pivote selon
la flèche F, pour passer de la position non verrouillée à celle
verrouillée (fig.2), la butée 11 conserve la même orientation et
tout ce passe comme si l'organe 3 pivotait autour de l'axe de l'arbre
2, cet axe est repéré 13 sur les figures 3 à 5. Par la suite, la butée
11 sera dénommée "butée fixe".At this stage of the description, it should be recalled that, in the
position shown in Figure 1, the
La butée fixe 11 présente une surface de contact 14, convexe,
située sur un cylindre droit fictif C dont les génératrices sont
parallèles à l'axe 13.The fixed
La butée 12 présente une surface de contact 15, concave,
située sur un cylindre droit fictif C dont les génératrices sont
parallèles à l'axe 13.The
Les deux cylindres précitées ont le même diamètre et,
lorsque l'organe 3 est en position verrouillée (fig.2 et 5), les axes
des deux cylindres fictifs coïncident. Il n'y a pas de jeu entre les
surfaces 14 et 15 et c'est la situation idéale.The two aforementioned cylinders have the same diameter and,
when the
Selon l'invention, l'axe Ci du cylindre comportant la surface
14 est déporté par rapport à l'axe 13 dans le sens de la rotation de
l'organe 3 pour passer de la position de la figure 1 à celle de la
figure 2. According to the invention, the axis Ci of the cylinder comprising the
De cette façon, et comme cela ressort des figures 3 et 4,
aucun contact, générateur de frottements destructeurs, ne peut se
produire entre les surfaces 14 et 15, durant la rotation, les deux
dites surfaces arrivant seulement en contact à la fin du
mouvement.In this way, and as can be seen from Figures 3 and 4,
no contact, generator of destructive friction, can be
produce between
Ce résultat idéal implique que l'arbre 2 ne présente aucune
déformation. L'expérience a montré que ce n'était malheureusement
pas le cas. Il a été mis en évidence, au contraire, que , lors de la
fixation de l'arbre 2 à l'outil, ledit arbre avait tendance à se
déformer et que, malgré tout le soin apporté à l'usinage des butées
et à leur fixation sur leur support respectif, un jeu, ou un serrage,
trop important se produisait entre les deux surfaces de contact en
position verrouillée.This ideal result implies that
Selon une autre caractéristique de l'invention, qui remédie à
cet inconvénient, la butée 11 est réalisée en deux parties 11a et
11b assemblées avec interposition d'une cale 16. L'assemblage
s'effectue au moyen de vis à têtes noyées dont les axes sont
schématisés en 17.According to another characteristic of the invention, which remedies
this drawback, the
Ce dernier dispositif permet d'adapter l'outil à l'organe d'accrochage et de corriger, de façon définitive, un défaut de construction de l'outil.This last device makes it possible to adapt the tool to the organ of attachment and to correct, in a final way, a defect of tool construction.
Si, en position verrouillée, un jeu trop important subsiste
entre les surfaces on augmente l'épaisseur de la cale 16 et
inversement dans le cas contraire.If, in the locked position, too much play remains
between the surfaces, the thickness of the
Claims (2)
- Device for fixing a tool at the extremity of the arm (1) of a mechanical shovel, the device comprising a fast connection comprising a hooking member (3) able to be borne by said arm (1), and a shaft (2) provided with a stop (11) able to be borne by the tool, said member (3) having a stop (12) able to cooperate in a locked position with said stop (11) of the shaft (2), characterised in that the axis (1) of the dummy cylinder (C) on which the contact surfaces (14-15) of the stops is located at the front of the axis (13) of the shaft (2) able to be borne by the tool with respect to the direction of rotation of the hooking member when the latter pivots from the unlocked position to the locked position.
- Device according to claim 1, characterised in that the stop (11) able to be borne by the tool is made up of two portions, one of the latter comprising the contact surface (14), an adjustable wedge being inserted between said portions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9606641 | 1996-05-30 | ||
| FR9606641A FR2749332B1 (en) | 1996-05-30 | 1996-05-30 | DEVICE FOR ATTACHING A TOOL AT THE END OF THE ARM OF A MECHANICAL SHOVEL |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0810330A1 EP0810330A1 (en) | 1997-12-03 |
| EP0810330B1 true EP0810330B1 (en) | 2002-10-09 |
Family
ID=9492539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97400869A Expired - Lifetime EP0810330B1 (en) | 1996-05-30 | 1997-04-18 | Device for connecting a tool to the end of an arm of an excavator |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0810330B1 (en) |
| AT (1) | ATE225881T1 (en) |
| DE (1) | DE69716164T2 (en) |
| DK (1) | DK0810330T3 (en) |
| ES (1) | ES2184967T3 (en) |
| FR (1) | FR2749332B1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE791834A (en) * | 1971-12-01 | 1973-03-16 | Verachtert Antonius P | EXCAVATOR |
| FR2717516B1 (en) * | 1994-03-16 | 1996-05-03 | Pel Job Groupe | Device for allowing the automatic taking of tools, in particular for earth-moving machinery or the like. |
| FR2725224B1 (en) * | 1994-09-29 | 1997-04-18 | Morin Freres | IMPROVEMENTS ON DEVICES FOR ATTACHING A TOOL AT THE END OF THE ARM OF A HYDRAULIC SHOVEL OR THE LIKE |
-
1996
- 1996-05-30 FR FR9606641A patent/FR2749332B1/en not_active Expired - Fee Related
-
1997
- 1997-04-18 ES ES97400869T patent/ES2184967T3/en not_active Expired - Lifetime
- 1997-04-18 AT AT97400869T patent/ATE225881T1/en active
- 1997-04-18 EP EP97400869A patent/EP0810330B1/en not_active Expired - Lifetime
- 1997-04-18 DE DE69716164T patent/DE69716164T2/en not_active Expired - Lifetime
- 1997-04-18 DK DK97400869T patent/DK0810330T3/en active
Also Published As
| Publication number | Publication date |
|---|---|
| ATE225881T1 (en) | 2002-10-15 |
| FR2749332A1 (en) | 1997-12-05 |
| FR2749332B1 (en) | 1998-07-03 |
| ES2184967T3 (en) | 2003-04-16 |
| DE69716164T2 (en) | 2003-06-05 |
| EP0810330A1 (en) | 1997-12-03 |
| DE69716164D1 (en) | 2002-11-14 |
| DK0810330T3 (en) | 2003-02-03 |
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