EP1138833B1 - Dispositif pour le rapide montage et demontage d'un outil d'excavation sur une excavatrice hydraulique - Google Patents

Dispositif pour le rapide montage et demontage d'un outil d'excavation sur une excavatrice hydraulique Download PDF

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Publication number
EP1138833B1
EP1138833B1 EP01106465A EP01106465A EP1138833B1 EP 1138833 B1 EP1138833 B1 EP 1138833B1 EP 01106465 A EP01106465 A EP 01106465A EP 01106465 A EP01106465 A EP 01106465A EP 1138833 B1 EP1138833 B1 EP 1138833B1
Authority
EP
European Patent Office
Prior art keywords
bolt
locking element
jack
engagement
excavator
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
EP01106465A
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German (de)
English (en)
Other versions
EP1138833A1 (fr
Inventor
Giorgio Cangini
Alessandro Cecchini
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.)
Cangini Benne SRL
Original Assignee
Cangini Benne SRL
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Filing date
Publication date
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Publication of EP1138833A1 publication Critical patent/EP1138833A1/fr
Application granted granted Critical
Publication of EP1138833B1 publication Critical patent/EP1138833B1/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
    • E02F3/3627—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a longitudinal locking element
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/365—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with redundant latching means, e.g. for safety purposes
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3672—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where disengagement is effected by a mechanical lever or handle

Definitions

  • Hydraulic excavators are machines equipped with a strong, articulated or telescopic arm which ends with a shovel or other excavating tool.
  • excavators are defined as face shovels or backhoes.
  • face shovels the tool is directed outward and excavates by moving away from the machine; in the second case, i.e., backhoes, the tool faces the machine and excavates by moving toward it.
  • the arm of the excavator is equipped with an engagement or coupling device which can be operated manually in some cases and hydraulically in others and generally uses a bolt-like element which tends to protrude, by being pushed by appropriately provided springs, from the front opening of a box-like body shaped at the rear end so as to engage a pin of the excavating tool before the connection is completed by the insertion of said bolt element in an appropriately provided seat of said tool.
  • Such a safety retainer i.e., a retainer which is again of the mechanical type and is manually operated, is also present in excavators whose device for engaging and disengaging the excavating tool is equipped with a jack connected to the hydraulic system of the excavator and controlled from the driver's seat whenever it is necessary to temporarily retract the bolt, which is constantly pushed in the opposite direction by its own springs.
  • EP-A2-1033447 discloses a device for rapid tool coupling and release according to the preamble of claim 1 and comprising a pair of teeth that are engageable/disengageable in a tool seating, upon actuation of a hydraulic piston.
  • a safety blocking pivot may inserted into and extracted from a seating in a coupling element supporting the teeth, for allowing the teeth movement for engagement/disengagement.
  • WO 98/46835 discloses an excavator tool attachment device comprising a latch mechanism operated by a first hydraulic cylinder, and a safety bolt for the latch mechanism operated by a second hydraulic cylinder.
  • the device according to the invention generally consists of two bodies: an upper body 1, at which the manual actuation lever 3, the hydraulic jack 2 and the pin 5 of the safety retainer are supported; and a lower body 2, on the two sides of which the perforated lugs 2A protrude parallel to each other for connection to the articulated arm 12 of the excavator and to the actuation jack of the shovel 13;
  • the body 2 has substantially the shape of a flat box, open at the front and from which the bolt 6 which is slidably movable therein can protrude, said body being provided at the rear thereof with a recess 2B by means of which it straddles the retainer 13A of the excavating tool 13 for the mutual rotation of the two elements (as in Figures 7 and 8 ) until engagement is completed.
  • Said bolt 6, being pushed by a plurality of helical springs 7, constantly tends to protrude from the front side of the lower body 2 to the extent allowed by the wing 8 which is fixed on the bolt and by the opening 2C, which is provided in the upper part of the box in which said bolt slides, and determines the stroke of said bolt and allows said wing 8 to enter the cavity 1A of the upper body 1 where when necessary it can be pushed by the hydraulic jack 4 to retract in contrast with the springs 7.
  • the bolt 6 is also provided with circular holes 6A and 6B for accommodating, respectively, the manual actuation lever 3 and the pin 5 of the safety retainer, both of which are supported in the upper body 1 of the engagement device and reach said holes through the openings 2D and 2E provided in the upper wall of the box in which the bolt slides.
  • the opening 2D is elongated in the direction in which the bolt moves, as required by the variations in the inclination of the lever 3, stably engaged in the hole 6A of the bolt and pivoted for this purpose to the upper body 1 with a sort of ball-and-socket joint.
  • the opening 2E is instead circular in shape so as to accommodate the guiding bush 9 of the pin 5, which in turn engages the hole 6B of the bolt when such hole is concentric to the opening 2E ( Figure 7 ), that is only when the bolt 6 has completed its engagement stroke.
  • the pin 5 acting as a safety retainer and therefore preventing the accidental disengagement of the shovel or of any other tool applied to the arm of the excavator, is in practice the piston of a sort of single-acting hydraulic jack and is kept extended, i.e., so as to act as a retainer, by a return spring the thrust force of which is significantly lower than the force of the two or more springs 7 that tend to keep the bolt 6 closed or in any case protruding from the box-like body 2.
  • said jack is connected to the hydraulic system so that the retraction of the piston or pin 5 occurs by means of the same oil causing the extension of the jack 4 and the retraction of the bolt, the required retraction of the pin 5 before the retraction of the bolt 6 being determined by the different thrust force of the springs that act on the two elements.
  • a possible variation for obtaining the same automatic sequence in the retraction of the pin-piston 5 and of the bolt 6 regardless of the thrust force of the respective springs consists in making the oil of the hydraulic system flow to the jack 4 of the bolt through a passage which is blocked by the pin-piston 5 until it is retracted completely by means of said oil.
  • the device according to the invention has been devised so that it can be actuated both hydraulically and manually.
  • the portion 5B thereof lying directly below the hook 5A and protruding with said hook from the bush 10 when the pin-piston is in the retracted position is red in color, so that the operator can detect any anomaly even from a distance.
  • the red collar remains visible after the excavating tool has been engaged manually or hydraulically, this means that the engagement has not been performed correctly and/or in any case the safety retainer has not been inserted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Shovels (AREA)

Claims (10)

  1. Dispositif pour un enclenchement et désenclenchement rapides d'un outil d'excavation dans des excavateurs hydrauliques, du type applicable au bras (12) de l'excavateur afin d'enclencher l'outil d'excavation au moyen d'un élément de type boulon (6) qui est poussé par des ressorts (7) adaptés, reçus dans un corps (2) de type boîte identique, ledit élément de type boulon (6) étant verrouillable dans une condition enclenchée par interférence avec un élément de verrouillage (5) qui repose transversalement à sa direction de mouvement, ledit élément de type boulon (6) étant en cours d'utilisation poussé constamment dans la condition enclenchée par lesdits ressorts (7) prévus de façon appropriée, et l'élément de type boulon (6) étant mobile dans la direction opposée au moyen d'un vérin (4) pouvant être raccordé au système hydraulique de l'excavateur, caractérisé en ce que le dispositif est muni de deux trous (6A, 6B) ou d'autres éléments d'enclenchement de façon à recevoir dans l'un de ceux-ci l'extrémité d'un levier (3) pour un désenclenchement manuel d'urgence de l'outil et dans l'autre l'élément de verrouillage (5) qui, retenu au niveau de celui-ci par la poussée d'un ressort supplémentaire, peut être retiré à la fois de façon hydraulique et manuelle, puisqu'il fait également saillie à l'extérieur du dispositif, de sorte que dans lesdits cas d'urgence, toute défaillance ou anomalie dans le système hydraulique de l'excavateur seul ou de l'outil d'excavation seul est empêché, et une séparation du dispositif du bras de l'excavateur est empêchée, et par conséquent, une utilisation immédiate de la partie toujours efficace est maintenue, dans lequel en cours d'utilisation normale, ledit élément de type boulon (6) et l'élément de verrouillage (5) correspondant peuvent être actionnés en séquence de façon hydraulique et/ou mécanique depuis le siège du conducteur de l'excavateur.
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément de verrouillage (5) est le piston d'un vérin hydraulique à simple effet, sollicité de façon élastique de façon à faire saillie dans une condition de sécurité par un ressort dont la force de poussée est nettement inférieure à la force de poussée desdits ressorts (7) pour pousser ledit élément de type boulon (6), ledit vérin hydraulique étant raccordé au système hydraulique de sorte que le retrait dudit vérin hydraulique survient dû à la pression hydraulique qui provoque l'allongement du vérin (4) pour déplacer ledit élément de type boulon (6), la force de poussée différente entre lesdits ressorts (7) et le ressort dudit vérin hydraulique forçant ledit piston dudit vérin hydraulique à se rétracter avant l'élément de type boulon (6).
  3. Dispositif selon les revendications précédentes, caractérisé en ce qu'il comprend :
    - un corps supérieur (1), dans lequel le levier d'actionnement manuel (3), le vérin hydraulique (4) et l'élément de verrouillage (5) du dispositif de retenue de sécurité sont supportés ;
    - un corps inférieur (2), sur les côtés duquel des ergots perforés (2A). font saillie en parallèle les uns aux autres pour un raccordement au bras articulé (12) de l'excavateur et à un vérin actionnant un outil d'excavation (13), ledit corps inférieur (2) se composant d'une sorte de boîte plate ouverte à l'avant et dont dépasse l'élément de type boulon (6) qui y coulisse, ledit corps inférieur (2) étant muni, à l'arrière de celui-ci, d'un enfoncement (2B) au moyen duquel il peut chevaucher le dispositif de retenue (13A) de l'outil d'excavation (13) pour la rotation mutuelle des deux éléments jusqu'à ce que l'enclenchement soit achevé.
  4. Dispositif selon la revendication 3, caractérisé en ce que l'élément de type boulon (6), poussé par lesdits ressorts (7), a constamment tendance à faire saillie du côté avant du corps inférieur (2) dans la mesure autorisée par une aile (8) fixée sur l'élément de type boulon et par une ouverture (2C) prévue dans une paroi supérieure de la boîte dans laquelle coulisse le boulon et détermine la course dudit boulon et permet à ladite aile (8) d'entrer dans une cavité (1A) du corps supérieur (1), où si nécessaire, il peut être poussé pour se rétracter par le vérin (4) contrairement aux ressorts (7).
  5. Dispositif selon les revendications précédentes 3 et 4, caractérisé en ce que l'élément de type boulon (6) est également muni de trous circulaires (6A, 6B) pour recevoir respectivement le levier d'actionnement manuel (3) et l'élément de verrouillage (5), à la fois le levier (3) et l'élément de verrouillage (5) étant supportés dans le corps supérieur (1) du dispositif d'enclenchement et s'étendant à travers lesdits trous circulaires (6A, 6B) et à travers des ouvertures respectives (2D, 2E) prévues dans une paroi supérieure de la boîte dans laquelle coulisse l'élément de type boulon (6).
  6. Dispositif selon la revendication 5, caractérisé en ce que l'ouverture (2D) pour ledit levier (3) est allongée dans la direction dans laquelle se déplace l'élément de type boulon (6) comme requis par les variations de l'inclinaison du levier (3) enclenché de façon stable dans le trou respectif (6A) pour celui-ci du boulon et amené à pivoter à cet effet vers le corps supérieur (1), avec une articulation à rotule.
  7. Dispositif selon la revendication 6, caractérisé en ce que l'ouverture (2E) pour ledit élément de verrouillage (5) est au lieu de cela de forme circulaire de façon à loger une douille de guidage (9) de l'élément de verrouillage (5), qui s'enclenche à son tour dans le trou respectif (6B) pour celle-ci de l'élément de type boulon (6) lorsque ledit trou respectif (6B) est concentrique par rapport à l'ouverture (2E) pour ledit élément de verrouillage (5) seulement lorsque l'élément de type boulon (6) a achevé sa course d'enclenchement.
  8. Dispositif selon les revendications précédentes, comprenant en outre un crochet (5A) prévu en haut de l'élément de verrouillage (5), qui peut s'enclencher, si nécessaire, avec un levier (11) au moyen duquel ledit élément de verrouillage (5) peut être facilement soulevé et aussi bloqué dans la position rétractée aussi longtemps que requis par l'opérateur pour rétracter manuellement l'élément de type boulon (6).
  9. Dispositif selon la revendication 8, caractérisé en ce qu'une partie supérieure (5B) dudit élément de verrouillage (5) située directement sous le crochet (5A) et faisant saillie avec celui-ci à partir d'une douille (10) lorsque ledit élément de verrouillage (5) se trouve dans la position rétractée, est de couleur rouge, de façon à permettre à l'opérateur de détecter visuellement toute anomalie, même à partir d'une certaine distance, de manière à ce qu'une couleur rouge visible après l'enclenchement hydraulique ou manuel de l'outil d'excavation indique que l'enclenchement n'a pas été effectué correctement et/ou dans tous les cas que le dispositif de retenue de sécurité n'a pas été inséré.
  10. Dispositif selon la revendication 2, caractérisé en ce qu'afin de réaliser de façon hydraulique le retrait automatique de l'élément de verrouillage (5) avant le retrait de l'élément de type boulon (6), un écoulement d'huile vers le vérin (4) agissant sur ledit élément de type boulon (6) est commandé par un écoulement à travers un passage qui est bloqué par l'élément de verrouillage (5) jusqu'à un retrait complet par ledit écoulement d'huile.
EP01106465A 2000-03-27 2001-03-23 Dispositif pour le rapide montage et demontage d'un outil d'excavation sur une excavatrice hydraulique Expired - Lifetime EP1138833B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000FO000006A IT1319865B1 (it) 2000-03-27 2000-03-27 Dispositivo per l'aggancio e lo sgancio rapido dell'attrezzo di scavonegli escavatori idraulici.
ITFO000006 2000-03-27

Publications (2)

Publication Number Publication Date
EP1138833A1 EP1138833A1 (fr) 2001-10-04
EP1138833B1 true EP1138833B1 (fr) 2008-10-22

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EP01106465A Expired - Lifetime EP1138833B1 (fr) 2000-03-27 2001-03-23 Dispositif pour le rapide montage et demontage d'un outil d'excavation sur une excavatrice hydraulique

Country Status (6)

Country Link
EP (1) EP1138833B1 (fr)
AT (1) ATE412088T1 (fr)
DE (1) DE60136238D1 (fr)
DK (1) DK1138833T3 (fr)
ES (1) ES2316409T3 (fr)
IT (1) IT1319865B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2517499B (en) * 2013-08-23 2017-08-23 Geith Int Ltd Safety coupling mechanism

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2381257B (en) * 2001-10-26 2004-09-08 Agco Gmbh & Co Front loader
DE10221941A1 (de) 2002-05-17 2003-12-04 Deere & Co Vorrichtung zum Festlegen eines Werkzeugs an einem Hubwerk
CA2590464A1 (fr) 2007-05-30 2008-11-30 Brandt Industries Ltd. Mecanisme a raccord rapide pour fixation d'outil
AT507598B1 (de) * 2008-12-05 2012-03-15 Wacker Neuson Linz Gmbh Vorrichtung zum auswechselbaren aufnehmen von werkzeugen
AT508631A1 (de) 2009-08-21 2011-03-15 Perwein Baumaschinen Systeme Gmbh Kupplungsvorrichtung
AT510095B1 (de) * 2010-07-06 2012-06-15 Erna Kronberger Insektenschutzvorrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506604A1 (fr) * 1991-01-10 1992-09-30 Metallbau Und Spezialkonstruktionen In Metall, Michael Hand Raccord rapide pour l'attelage temporaire d'outils de travail à une flêche d'un engin de terrassement
JP2809260B2 (ja) * 1993-03-17 1998-10-08 株式会社坂戸工作所 建設作業機械用連結具
JP2803807B2 (ja) * 1993-03-17 1998-09-24 株式会社坂戸工作所 建設作業機械用連結具
JP3283393B2 (ja) * 1995-01-31 2002-05-20 株式会社坂戸工作所 建設作業機械用連結具
WO1998046835A1 (fr) * 1997-04-14 1998-10-22 Baumaschinentechnik Gesellschaft Mbh Dispositif de montage rapide pour pelle mecanique
IT1310182B1 (it) * 1999-03-02 2002-02-11 Mantovanibenne S R L Dispositivo per il bloccaggio e lo sbloccaggio rapidi di attrezzi abracci operatori.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2517499B (en) * 2013-08-23 2017-08-23 Geith Int Ltd Safety coupling mechanism

Also Published As

Publication number Publication date
ITFO20000006A0 (it) 2000-03-27
ES2316409T3 (es) 2009-04-16
EP1138833A1 (fr) 2001-10-04
DK1138833T3 (da) 2009-03-02
ITFO20000006A1 (it) 2001-09-27
DE60136238D1 (de) 2008-12-04
IT1319865B1 (it) 2003-11-03
ATE412088T1 (de) 2008-11-15

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