EP0555566B1 - Dispositif hydraulique d'accouplement pour la prise et dépose d'un outil de travail d'excavatrice - Google Patents

Dispositif hydraulique d'accouplement pour la prise et dépose d'un outil de travail d'excavatrice Download PDF

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Publication number
EP0555566B1
EP0555566B1 EP92250060A EP92250060A EP0555566B1 EP 0555566 B1 EP0555566 B1 EP 0555566B1 EP 92250060 A EP92250060 A EP 92250060A EP 92250060 A EP92250060 A EP 92250060A EP 0555566 B1 EP0555566 B1 EP 0555566B1
Authority
EP
European Patent Office
Prior art keywords
piston
coupling
cylinder
tool
cylinder arrangement
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
Application number
EP92250060A
Other languages
German (de)
English (en)
Other versions
EP0555566A1 (fr
Inventor
Aloys Dipl.-Ing. Narberhaus
Norbert Hein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Weyhausen GmbH
Original Assignee
Atlas Weyhausen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Atlas Weyhausen GmbH filed Critical Atlas Weyhausen GmbH
Publication of EP0555566A1 publication Critical patent/EP0555566A1/fr
Application granted granted Critical
Publication of EP0555566B1 publication Critical patent/EP0555566B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02F3/3613—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with means for absorbing any play therebetween
    • 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
    • E02F3/3618—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with two separating hooks
    • 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
    • E02F3/3631—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 transversal 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
    • E02F3/364—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using wedges
    • 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 invention relates to a hydraulically actuated (quick) coupling device, also referred to in practice as a quick-change device, for coupling or uncoupling the free end of the boom of an implement such as an excavator, loader or the like, in particular an articulated arm of a hydraulic excavator or from a tool such as a spoon or the like. according to the preamble of claim 1.
  • a hydraulically actuated (quick) coupling device also referred to in practice as a quick-change device, for coupling or uncoupling the free end of the boom of an implement such as an excavator, loader or the like, in particular an articulated arm of a hydraulic excavator or from a tool such as a spoon or the like. according to the preamble of claim 1.
  • tools are known, the tools of which can be converted with regard to the job to be performed, for example, to exchange a spoon for another spoon with a different working width, to arrange a backhoe bucket instead of a bucket or another tool such as to couple a demolition hammer.
  • the tools are therefore provided with coupling elements which interact with correspondingly designed coupling parts of the coupling element. This is usually done when coupling. first with a "rough form fit" (i.e. with play), and only in a second step so that a play-free connection between the tool and the coupling element (and thus the boom) is achieved.
  • the wedge-shaped or conical securing element has already been actuated by means of a hydraulic piston-cylinder arrangement which is arranged parallel to the direction of movement of the securing element and connected to the securing element by means of tabs, levers or the like which are connected to one another in an articulated manner.
  • a parallel arrangement of the piston-cylinder arrangement acting on the securing element to the direction of movement of the securing element has already been considered indispensable, because otherwise they protrude laterally too far beyond the coupling element and thus the earthworks or the like. would hinder and be at risk of damage.
  • the cylinder is fixedly arranged in the usual way on the coupling element and the piston rod, which is axially movable when the piston is pressurized appropriately, is articulated at its free end facing away from the piston with a connecting element of the lever arrangement acting on the securing element or the like. connected.
  • This generic coupling device has the advantage over the coupling device described above that the securing element can also be actuated from the driver's station of the implement in question, but because of the parallelism between the piston-cylinder arrangement on the one hand and the securing element on the other hand and the associated redirection of force in the connecting elements (brackets, levers, joints) due to the moments that occur to considerable stresses and wear, especially since this area is in the dirt area in earth-moving machines. In addition, an undesired hydraulic pressure drop can lead to difficulties.
  • the present invention is therefore based on the object to improve the generic coupling device with simultaneous simplification in particular in that the actuating force generated by the hydraulic piston-cylinder arrangement for the securing element can attack centrally avoiding the inevitable occurring in the relevant prior art significant moments without leading to the disadvantages described above, a compact and better protected against external influences training is also sought.
  • a separate securing element is no longer provided as before, but in that the securing element is a cylinder with a wedge-shaped or conical outer jacket which represents the part of the piston-cylinder arrangement which actuates the coupling element, where - Completely different from a piston-cylinder arrangement which acts only as an actuating device - the cylinder forming the securing element and accordingly correspondingly designed cylinder is axially displaceable, while its piston rod is axially immovably mounted on the coupling element.
  • a spring arrangement is provided, by means of which the axially movable cylinder of the piston-cylinder arrangement forming the securing element is pressed into the coupling position.
  • this type of training is extremely advantageous in order to ensure that it is hydraulic) pressure drop remains with a backlash-free connection.
  • a first axial passage opening extends through the piston rod of the piston-cylinder arrangement containing the securing element, said opening optionally extending the pressure oil source of the piston-cylinder arrangement with the connects between the annular piston surface facing the piston rod and the (first) cylinder space lying opposite the cylinder wall, this retraction of the securing element from the coupling position in the presence of the spring arrangement described above thus taking place against the force of the spring arrangement.
  • a control device is preferably provided, by means of which pressure is to be applied to the second cylinder space in order to bring the securing element into its locking position.
  • the drawing shows a coupling device designated as a whole with 1 (see FIG. 5) for coupling and uncoupling the free end of the boom 2 of a backhoe to various tools such as e.g. a spoon 3, the boom 2 in Fig. 1 omitted for the sake of clarity and in Fig. 2 has only been indicated schematically with dash-dotted lines.
  • Two hook-shaped first coupling elements 4 are formed on the outside of the bucket 3 facing the boom 2, just like in the case of other tools which are to be coupled optionally.
  • the spoon 3 is provided with a second hook-shaped coupling element 5, which sits in the center of the spoon 3 and thus between the two first coupling elements 4, 4 at a distance from them.
  • the part of the coupling device 1 arranged on the boom 2 has a frame-shaped coupling element 6 which is pivotably mounted on the free end section of the boom 2 by means of a pivot bolt 7 extending transversely to the boom 2.
  • the coupling element 6 has a second pin 8 arranged parallel to the first pin 7, on which a piston-cylinder arrangement 9 acts as an actuating device for pivoting into the coupling elements 4, 5 of the bucket 3 indirectly via a deflecting linkage 10 (which may also be the case could take place directly), the coupling element 6 being pivoted about the first bolt 7 by means of this piston-cylinder arrangement 9.
  • the excavator operator moves the boom 2 over the bucket 3 so that the pivot pin 7 can first be hooked into the first coupling elements 4 of the bucket 3, and then swivels the coupling element 6 by means of the piston-cylinder arrangement 9 down in 5, with the spoon 3 lifting up a little.
  • the first coupling elements 4 interact positively with the pivot pin 7 (if desired with an axis running parallel to it), and the second coupling element 5 partially fits positively into the front end section of the coupling element 6, without, however So far, a play-free connection between the spoon 3 and coupling element 6 has been achieved.
  • This securing element 12 is the wedge-shaped cylinder of a piston-cylinder arrangement designated as a whole by 13 (see in particular FIG. 3), the cylinder of the arrangement 13 forming the securing element 12 being axially displaceable in the direction of its piston rod 14 , while the piston rod 14 is axially immovable on the coupling element 6.
  • piston-cylinder arrangement 13 containing the securing element 12 is essentially completely encapsulated in the head section of the coupling element 6, that is to say is appropriately protected and practically does not protrude laterally beyond it.
  • the piston rod 14 is surrounded concentrically by a compression spring 15 which is supported at one end on the end face of the cylinder forming the securing element 12 facing the piston rod 14 and at its other end on the frame 6 'of the coupling element 6.
  • a first axial through opening 16 extends through the piston rod 14 and connects the pressure oil source (not shown in the drawing) of the piston-cylinder arrangement 13 optionally with the annular piston surface 17 facing the piston rod 14 and the cylinder wall 18 lying opposite it, which has shrunk to zero in FIG. 3 due to the coupling state shown there, since the annular piston surface 17 bears against the cylinder wall 18.
  • a second axial through bore 20 extends through both the piston rod 14 and the piston 21 and connects the pressure oil source of the piston-cylinder arrangement 13 optionally to the second cylinder space 24 lying between the free piston end face 22 and the cylinder wall 23 opposite this.
  • the piston-cylinder arrangement 13 is essentially completely integrated into the head section of the coupling element 6 and surrounded by a tubular housing 25, the central section of which is assigned to the second coupling element 5 of the tool 3 to be coupled is.
  • the coupling device 1 operates as follows:
  • the excavator operator pressurizes the first axial passage opening 16 with pressure oil before reaching the coupling position according to FIG. 5, which oil thereby passes between the annular piston surface 17 and the cylinder wall 18. while at the same time the second axial through hole 20 is opened to drain hydraulic oil.
  • the pressure oil entering the first cylinder chamber acts on the cylinder wall 18 and presses the wedge-shaped securing element 12 formed by the cylinder of the piston-cylinder arrangement 13 against the force of the compression spring 15, which concentrically surrounds the piston rod 14 and is supported on the one hand on the securing element and on the other hand on the frame of the coupling element 6, in its decoupling position, denoted by 12 'in FIG. 3 and shown in broken lines.
  • the excavator operator switches the pressurization from the first through bore 16 to the second through bore 20, so that pressure oil enters the second cylinder space 24 while the pressure oil located in the first cylinder space flows off.
  • the cylinder of the piston-cylinder arrangement forming the securing element 12 is shifted from its retracted decoupling position 12 'into the coupling position shown in solid lines in FIG. 3, the application of pressure oil being effected by means of a corresponding control device, so that the securing element 12 is thereby is hammered into its coupling position and now ensures a firm, play-free connection between tool 3 and coupling element 6 or boom 2.
  • the pressure spring 15 nevertheless ensures that it remains with a secure, play-free connection.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Earth Drilling (AREA)

Claims (9)

  1. Dispositif d'accouplement (1) à actionnement hydraulique, destiné à coupler ou à découpler le bras (2) d'un engin de travail tel qu'une pelle mécanique, une chargeuse mécanique ou analogue, notamment le bas articulé d'une pelle mécanique hydraulique, à un outil ou d'un outil (3) tel qu'un godet ou analogue, le dispositif comportant un élément de couplage (6), qui est articulé, au niveau du tronçon d'extrémité libre du bras (2), à une broche de pivotement (7), qui est susceptible de pivoter par rapport au bras (2) au moyen d'un dispositif d'actionnement, et qui, à une de ses extrémités, doit être amenée en prise par complémentarité de forme avec des premiers éléments d'accouplement (4) disposés sur le côté extérieur de l'outil (3), l'ensemble comportant également, disposé à l'autre extrémité de l'élément de couplage (6), un élément d'arrêt (12) de configuration en forme de coin ou de forme conique, qui est guidé parallèlement à la broche de pivotement (7), peut être actionné par un ensemble piston-cylindre hydraulique (13), et au moyen duquel l'élément de couplage (6) est à relier sans jeu à l'outil (3), par complémentarité de forme, par l'intermédiaire d'un second élément d'accouplement (5) de l'outil (3), s'engageant, en position d'accouplement, dans le parcours de déplacement de l'élément d'arrêt (12), caractérisé en ce que l'élément d'arrêt (12) est un cylindre présentant une enveloppe extérieure en forme de coin ou de forme conique, qui représente la partie de l'ensemble piston-cylindre (13) actionnant l'élément d'accouplement (5), le cylindre (12) de cet ensemble étant axialement coulissant, tandis que son piston (14) est monté de manière axialement non coulissante sur l'élément de couplage (6).
  2. Dispositif d'accouplement selon la revendication 1, caractérisé en ce qu'au travers de la tige de piston (14) de l'ensemble piston-cylindre (13) s'étend une première ouverture de passage axiale (16), qui relie la source d'huile sous pression de l'ensemble piston-cylindre (13), au choix, à la (première) chambre de cylindre se trouvant entre la surface de piston (17) de forme annulaire dirigée vers la tige de piston et la paroi de cylindre (18) située en regard de cette surface de piston.
  3. Dispositif d'accouplement selon la revendication 2, caractérisé en ce qu'au travers de la tige de piston (14) et le piston (21) de l'ensemble piston-cylindre (13), s'étend une seconde ouverture de passage axiale (20), qui relie la source d'huile sous pression de l'ensemble piston-cylindre (13), au choix, à la seconde chambre de cylindre (24) se trouvant entre la surface frontale libre de piston (22) et la paroi de cylindre (23) située en regard de cette surface de piston.
  4. Dispositif d'accouplement selon la revendication 3, caractérisé en ce qu'est prévu un dispositif de commande, à l'aide duquel la seconde chambre de cylindre (24) est à alimenter en pression.
  5. Dispositif d'accouplement selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'est prévu un agencement de ressort (15) par lequel le cylindre de l'ensemble piston-cylindre (13), formant l'élément d'arrêt (12), est repoussé en position d'acccouplement.
  6. Dispositif d'accouplement selon la revendication 5, caractérisé en ce que l'agencement de ressort se présente sous la forme d'un ressort de compression (15), qui entoure la tige de piston (14) de manière concentrique, et qui s'appuie, à l'une de ses extrémités, sur le côté frontal du cylindre (12) dirigé vers la tige de piston (14), ainsi qu'avec son autre extrémité, sur le cadre de l'élément de couplage (6).
  7. Dispositif d'accouplement selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'ensemble piston-cylindre (13) englobant l'élément d'arrêt (12) est intégré, sensiblement en totalité, dans le tronçon de tête de l'élément de couplage (6).
  8. Dispositif d'accouplement selon la revendication 7, caractérisé en ce que l'ensemble piston-cylindre (13) est entouré d'un carter (25) de forme tubulaire, dont le tronçon central dirigé vers le second élément d'accouplement (5) de l'outil (3), est évidé.
  9. Dispositif d'accouplement selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'outil (3) présente une paire de premiers éléments d'accouplement (4) parallèles, de configuration en forme de crochet ou de coque, qui dans l'état accouplé, coopèrent par complémentarité de forme avec des tronçons de la broche de pivotement (7) ou un axe s'étendant parallèlement à celle-ci, et en ce que le second élément d'accouplement (5) de l'outil (3), qui coopère avec l'élément d'arrêt (12), et qui est disposé de manière sensiblement centrale sur l'outil (3), présente également une configuration en forme de crochet ou de coque.
EP92250060A 1992-02-14 1992-03-13 Dispositif hydraulique d'accouplement pour la prise et dépose d'un outil de travail d'excavatrice Expired - Lifetime EP0555566B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9202099U 1992-02-14
DE9202099U DE9202099U1 (de) 1992-02-14 1992-02-14 Hydraulische Kupplungseinrichtung zum An- und Abkuppeln eines Werkzeuges an einen Bagger o.dgl.

Publications (2)

Publication Number Publication Date
EP0555566A1 EP0555566A1 (fr) 1993-08-18
EP0555566B1 true EP0555566B1 (fr) 1996-05-22

Family

ID=6876278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92250060A Expired - Lifetime EP0555566B1 (fr) 1992-02-14 1992-03-13 Dispositif hydraulique d'accouplement pour la prise et dépose d'un outil de travail d'excavatrice

Country Status (3)

Country Link
EP (1) EP0555566B1 (fr)
AT (1) ATE138438T1 (fr)
DE (2) DE9202099U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA946878B (en) * 1993-09-08 1995-04-24 Keech Castings Australia Hydraulic fastening device and method
GB2286382A (en) * 1994-02-04 1995-08-16 Bamford Excavators Ltd Device for releasably mounting a working implement
DE10350749A1 (de) * 2003-10-30 2005-06-02 Deere & Company, Moline Werkzeugaufnahme

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH661305A5 (de) * 1983-09-15 1987-07-15 Stury Fredi Ag Bagger mit einer einrichtung zum wahlweisen befestigen des baggerloeffels am baggerausleger.
SE458534B (sv) * 1987-07-20 1989-04-10 Lidkoeping Svets & Maskinprod Anordning vid en snabbkoppling foer loesbar sammankoppling av ett arbetsredskap och en graevmaskins manoeverarm

Also Published As

Publication number Publication date
ATE138438T1 (de) 1996-06-15
EP0555566A1 (fr) 1993-08-18
DE59206376D1 (de) 1996-06-27
DE9202099U1 (de) 1992-04-16

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