EP2119834B1 - Un appareli pour l'accouplage d'un outil a un bras de travail avec un bloc de sécurité - Google Patents

Un appareli pour l'accouplage d'un outil a un bras de travail avec un bloc de sécurité Download PDF

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Publication number
EP2119834B1
EP2119834B1 EP09159504.1A EP09159504A EP2119834B1 EP 2119834 B1 EP2119834 B1 EP 2119834B1 EP 09159504 A EP09159504 A EP 09159504A EP 2119834 B1 EP2119834 B1 EP 2119834B1
Authority
EP
European Patent Office
Prior art keywords
attachment
seating
organ
pin
retractable tooth
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.)
Not-in-force
Application number
EP09159504.1A
Other languages
German (de)
English (en)
Other versions
EP2119834A3 (fr
EP2119834A2 (fr
Inventor
Alberto Mantovani
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.)
Mantovanibenne SRL
Original Assignee
Mantovanibenne SRL
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 Mantovanibenne SRL filed Critical Mantovanibenne SRL
Publication of EP2119834A2 publication Critical patent/EP2119834A2/fr
Publication of EP2119834A3 publication Critical patent/EP2119834A3/fr
Application granted granted Critical
Publication of EP2119834B1 publication Critical patent/EP2119834B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E02F3/3618—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
    • E02F3/3622—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 locking element acting on a pin
    • 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
    • E02F3/3645—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with auto-engagement means for automatic snap-on of the tool coupler part
    • 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

Definitions

  • the invention relates to an attachment organ for coupling a tool to an operating arm.
  • organs of the above-mentioned type are usefully applied in the coupling of earth-moving tools, such as for example buckets, to articulated arms of work machines.
  • the prior art provides attachment organs of various types.
  • both the pins of the tool would no longer be constrained internally of the respective seatings; both the direct blocking caused by the hooking on the first pivot, and the indirect hooking due to the traction transmitted to the second pin, might be absent.
  • the coupler comprises a body having an upper portion and a lower portion.
  • the upper portion includes a means of attaching said coupler to the piece of equipment and the lower portion has a first recess and a second recess for receiving the implement.
  • a first lever is pivotally connected to said body for blocking said first recess
  • a second lever is pivotally connected to said body for blocking said second recess.
  • At least one actuator is connected at an end thereof to said first lever and at another end thereof to said second lever.
  • the main aim of the present invention is to provide an attachment organ of the described type which does not exhibit the above-described risk of unhooking.
  • An advantage of the attachment organ of the present invention derives from the high degree of flexibility of use and the rapidity of the hooking of the tool on the operating arm.
  • a further advantage of the attachment organ of the invention relates to the possibility of unhooking both the tool pins from the blocking mechanism by means of a single action of the hooking system.
  • a further advantage of the attachment organ of the invention is to simplify the mounting of a tool on the device.
  • 1 denotes in its entirety an attachment organ for coupling a tool 100 to an operating arm 110, in particular for fixing a tool (for example a bucket) to an earth-moving machine of known type.
  • attachment organ 1 of the invention is described with reference to an ideal operating configuration thereof, shown in figure 2 .
  • This configuration is shown here instead of other possible views only for reasons of clarity of explanation; obviously the device can, according to the morphological characteristics of the elements to which it associated and the working displacements thereof, take on even radically different orientations to the one described and illustrated.
  • Positional relations between elements identified in terms of relative height, for example by the use of words such as lower and upper, are however to be interpreted at all times with reference to the ideal configuration defined above.
  • the attachment organ 1 of the invention is thus superiorly associable to an end of an operating arm 110 and inferiorly associable to a tool 100 to be coupled to the arm 110.
  • the organ comprises a frame 9, which exhibits a first seating 2 and a second seating 3 which are transversal and predisposed respectively to house a first attachment pin 101 and a second attachment pin 102 of the tool 100 in an attached operating configuration, a locking hook 4 which is mobile with respect to the frame 9 and means for moving 10 the hook 4.
  • the locking hook 4 is predisposed to close on the first seating 2, in the operating configuration of the attachment organ 1, exerting, through a contact surface 4a of the hook 4 a blocking action on the first attachment organ 101 housed internally of the first seating 2.
  • the blocking action is further predisposed to maintain the second attachment pin 102 blocked against a bottom surface 3a of the second seating 3; the bottom surface 3a is opposite, at least in the attachment configuration, to the contact surface 4a of the locking hook 4.
  • the means for moving 10 the locking hook 4 comprise a hydraulic jack as in the prior art as previously described.
  • the attachment organ 1 of the present invention is characterised in that it comprises a safety block 5 predisposed to prevent, in the attached configuration of the organ 1, a disengagement of the second attachment pin 102 from the second seating 3 in case of cessation of the blocking action exerted by the locking hook 4.
  • the safety block 5 enables the aim of the present invention, as specified herein above, to be achieved, i.e. to prevent the accidental unhooking of the tool 100 coupled to the operating arm 110. Even in a case where there is a fault, due for example to loss of hydraulic power, or a mechanical seizure of the jack of the means for movement 10, the tool 100, through the first pin 101 will free itself, remains constrained to the frame 109 by its second pin 102.
  • the emergency delineated above naturally precludes the operability of the joint formed by the attachment organ 1, but annuls the risks of the tool 100 falling with an evident improvement of the functioning safety of the machine.
  • the safety block 5 comprises, in the preferred embodiment of the invention: a retractable tooth 50, mobile between a projecting position and a retracted position, and means for maintaining the retractable tooth 50 in the projecting position at least in the attached configuration as defined herein above.
  • the retractable tooth 50 In the projecting position thereof the retractable tooth 50 at least partially occludes the second seating 3, preventing disengagement of the second attachment pin 102 with respect thereto; in the retracted position thereof, on the other hand, it does not prevent disengagement of the second attachment pin 102 from the second seating 3.
  • the safety block 5 further comprises an activating arm 51, solidly constrained to the retractable tooth 50.
  • the two elements are rotatably associated, according to a hinge axis x, to the frame 9.
  • the means for maintaining the retractable tooth 50 in the projecting position comprise elastic means 52 arranged between a free end of the activating arm 51 and the frame 9.
  • the elastic means 52 preferably constituted by at least a helical extension spring the ends of which are respectively constrained to the non-hinged end of the activating arm 51 and the frame 9, have a passive role, i.e. independent of the functional state of the hydraulic jack which, in the illustrated embodiment, represents the means for movement 10, in which passive role they maintain the retractable tooth 50 in the projecting position.
  • the conformation of the retractable tooth 50 and the position of the hinge axis x are particularly advantageous. Apart from facilitating the insertion of the second attachment pin 102 in the seating during mounting, they are such that any pressure of the second pin 102 blocked in the second seating 3 against the retractable tooth 50 generates a torque on the rotatable elements of the safety block 5 (i.e. the block made up of the retractable tooth 50 and the activating arm 51) which tends to maintain the retractable tooth 50 in the projecting position.
  • the safety block 5 i.e. the block made up of the retractable tooth 50 and the activating arm 51
  • the retractable tooth 50 exhibits a stop surface 50a which precludes, in the projecting position of the tooth, the disengaging of the second attachment position of the tooth, the disengaging of the second attachment pin 102 from the second seating 3, i.e. the attachment pin 102 abuts on the stop surface 50a in a case in which it is solicited to exit the seating.
  • the contact between the cylindrical surface of the pin 102 and the flat stop surface 50a generates, on the retracting tooth 50, a force which is perpendicular the stop surface 50a and applied in the tangential point between the two surfaces.
  • This force illustrated in figure 3 , is contained in a plane which passes close to the hinge axis x; the torque it generates with respect to the axis x tends to keep the retractable tooth 50 in the projecting position.
  • the force passes above the hinge axis x and the torque exerted is anticlockwise.
  • the form of both the second seating 3 and the above-defined rotatable elements of the safety block 5 merit special attention.
  • the second seating 3 is U-shaped and faces on a vertical surface of the frame 9; the rotatable elements of the safety block 5 are hinged below the second seating 3 and in proximity of the mouth thereof. Thanks to this arrangement of the functional elements, the stop surface 50a directly opposes the gravitational action acting on the tool 100 in a case in which the block exerted by the locking hook 4 fails.
  • the development directions of the retractable tooth 50 and the activating arm 51 in proximity of the hinge axis x define between them an acute angle. In this way, the activating arm 51 performs the excursion thereof immediately below the second seating 3.
  • the activating arm 51 further exhibits a slightly arched development such as to follow the concave progression of the seating 3; the helix spring hinges to the end of the arm in proximity of the bottom surface of the second seating 3a.
  • the other end of the spring is preferably hinged to an upper horizontal surface of the frame 9.
  • the retractable tooth 50 exhibits, in opposition to the stop surface 50a, an entry surface which connects the stop surface to a base of the tooth, i.e. the portion of tooth hinged to the hinge axis x.
  • the entry surface enables insertion of the second attachment pin 102 of the tool 100 in the second seating 3, in a first stage of mounting the tool 100 to the attachment organ 1. During this stage the second attachment pin 102 is inserted up to blocking it in position internally of the seating therefor; the pressure of the pin 102 against the entry surface overcomes the closing torque exerted on the rotatable elements of the safety block 5 by the elastic means 52.
  • the following stage of mounting the tool 100 to the attachment organ 1 is done after insertion of the pivot 102 into the second seating 3 with the locking hook 4 in the retracted position, and includes the insertion of the first attachment pin 101 in the first seating 2 and thus the closing thereon of the locking hook 4.
  • the presence of the safety block 5 considerably facilitates this stage of mounting, given that it maintains the second pin 102 in position during the course of the operation; during the mounting of the devices of the prior art, the positioning has to be guaranteed by other means.
  • the attachment organ 1 of the invention can comprise, in a non-exclusive embodiment thereof, means for moving the retractable tooth 50 from the projecting position to the retracted position during an opening movement of the locking hook 4.
  • the means enable the disengagement of the tool operating only on the means for moving 10 the locking hook 4.
  • the locking hook 4 is rotatably mobile between a closed position on the first seating 2 and an open position.
  • the above-mentioned means for moving 10 the retractable tooth 50, illustrated in figure 4 comprise a rocker 6 the opposite ends of which are constrained restingly to the locking hook 4 and to the non-hinged end of the activating arm 51, such as to realise a kinematic coupling between the two rotatable elements upon a rotation of the second element towards the open position.
  • attachment organs 1 are closed between two lateral longitudinal plates of the frame 9; superiorly the two plates are constrained to a horizontal plate of the frame 9.
  • the first and the second seatings 2, 3 are afforded on the lateral plates; consequently, the transversal attachment pins of the tool 100 are constrained to the attachment organ 1 at the opposite ends thereof.
  • the locking hook 4 and the retractable tooth 50 are rotatably arranged along the median axis of the device; they thus come into contact with a central portion of the attachment pins of the tool 100.

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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)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Surgical Instruments (AREA)
  • Manipulator (AREA)

Claims (8)

  1. Organe de fixation (1) pour l'accouplage d'un outil (100) à un bras de travail (110), ledit organe (1) pouvant être associé dans la partie supérieure à une extrémité d'un bras de travail (110) et associé dans la partie inférieure à un outil (100) pour être accouplé au bras de travail (110), comprenant : un châssis (9) présentant un premier logement transversal (2) et un second logement transversal (3) étant respectivement prédisposés pour loger un premier pivot de fixation (101) et un second pivot de fixation (102) de l'outil (100) dans une configuration de fixation fonctionnelle ; un crochet de verrouillage (4) étant mobile par rapport au châssis (9) et des moyens (10) destinés à déplacer le crochet de verrouillage (4), le crochet de verrouillage (4) étant prédisposé pour se fermer sur le premier logement (2) dans la configuration fonctionnelle de l'organe de fixation (1), exerçant via une surface de contact (4a) du crochet (4) une action de blocage sur le premier pivot de fixation (101) logé à l'intérieur du premier logement (2) ; l'action de blocage étant de plus prédisposée pour maintenir le second pivot de fixation (102) bloqué contre une surface de fond (3a) du second logement (3) situé à l'opposé, au moins dans la configuration de fixation, de la surface de contact (4a) du crochet de verrouillage (4) ; caractérisé en ce qu'il comprend de plus un dispositif de sécurité (5) prédisposé pour empêcher, dans la configuration de fixation de l'organe de fixation (1), un découplage du second pivot de fixation (102) du second logement (3) lorsque l'action de blocage exercée par le pivot de verrouillage (4) cesse d'être active ;
    le dispositif de sécurité (5) comprenant : une dent rétractable (50), mobile entre une position en saillie dans laquelle celle-ci ferme au moins partiellement le second logement (3), empêchant le découplage du second pivot de fixation (102) de celle-ci, et une position rétractée, au niveau de laquelle celle-ci n'entrave pas le découplage du second pivot de fixation (2) du second logement (3) ; et des moyens pour maintenir la dent rétractable (50) dans la position en saillie au moins dans la configuration de fixation de l'organe de fixation (1) ;
    caractérisé en ce que le dispositif de sécurité (5) comprend de plus un bras d'actionnement (51) étant solidaire de la dent rétractable (50), le bras d'actionnement (51) et la dent rétractable (50) étant associés de façon rotative à un axe de charnière (x) au châssis (9) ; les moyens destinés à maintenir la dent rétractable (50) dans la position en saillie comprenant des moyens élastiques (52) disposés entre une extrémité non-articulée du bras d'actionnement (51) et du châssis (9).
  2. Organe de fixation (1) selon la revendication 1, caractérisé en ce que la forme de la dent rétractable (50) et la position de l'axe de charnière (x) sont telles qu'une pression du second pivot de fixation (102) bloqué dans le second logement (3) contre la dent rétractable (50) génère un couple de serrage sur les éléments en rotation du dispositif de sécurité (5), ledit couple de serrage tendant à maintenir la dent rétractable (50) dans la position en saillie.
  3. Organe de fixation (1) selon la revendication 1, caractérisé en ce que la dent rétractable (50) présente une surface de butée (50a) empêchant, en correspondance de la position en saillie de la dent (50), une libération du second pivot de fixation (102) du second logement (3), et présente aussi une surface d'entrée opposée à la surface de butée (50a) permettant l'insertion (3) du second pivot de fixation (102) de l'outil (100) dans le second logement, la pression du second pivot (102) contre la surface d'entrée s'opposant à un couple de fermeture exercé sur les éléments en rotation du dispositif de sécurité (5) par les moyens élastiques (52).
  4. Organe de fixation (1) selon la revendication 1, caractérisé en ce que, à proximité de l'axe de charnière (x), les directions de développement de la dent rétractable (50) et du bras d'actionnement (51) définissent entre elles un angle aigu.
  5. Organe de fixation (1) selon la revendication 1, caractérisé en ce que le second logement (3) possède une forme en « U » et fait face à une surface verticale du châssis (9), les éléments en rotation du dispositif de sécurité (5) étant montés articulés en-dessous du second logement (3) et à proximité d'une embouchure de celui-ci.
  6. Organe de fixation (1) selon la revendication 1, caractérisé en ce que les moyens élastiques (52) sont constitués par au moins un ressort d'extension hélicoïdal dont les extrémités sont respectivement solidaires de l'extrémité libre du bras d'actionnement (51) et du châssis (9).
  7. Organe de fixation (1) selon la revendication 1, caractérisé en ce qu'il comprend des moyens destinés à déplacer la dent rétractable (50) de la position en saillie à la position rétractée dans un mouvement d'ouverture du crochet de verrouillage (4).
  8. Organe de fixation (1) selon la revendication 7, caractérisé en ce que le crochet de verrouillage (4) est mobile de façon rotative entre une position de fermeture sur le premier logement (2) et une position d'ouverture, les moyens destinés à déplacer la dent rétractable (50) comprenant un balancier (6) dont les extrémités opposées sont solidaires en appui par rapport au crochet de verrouillage (4) et au bras d'actionnement (51) de sorte à réaliser un couplage cinématique entre les deux éléments en rotation en correspondance de la rotation du second vers la position d'ouverture.
EP09159504.1A 2008-05-15 2009-05-06 Un appareli pour l'accouplage d'un outil a un bras de travail avec un bloc de sécurité Not-in-force EP2119834B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMO20080143 ITMO20080143A1 (it) 2008-05-15 2008-05-15 Organo d'attacco per l'accoppiamento di un attrezzo ad un braccio operatore con blocco di sicurezza.

Publications (3)

Publication Number Publication Date
EP2119834A2 EP2119834A2 (fr) 2009-11-18
EP2119834A3 EP2119834A3 (fr) 2013-11-27
EP2119834B1 true EP2119834B1 (fr) 2016-07-06

Family

ID=40302867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09159504.1A Not-in-force EP2119834B1 (fr) 2008-05-15 2009-05-06 Un appareli pour l'accouplage d'un outil a un bras de travail avec un bloc de sécurité

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Country Link
EP (1) EP2119834B1 (fr)
IT (1) ITMO20080143A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2467380B (en) 2009-02-03 2010-12-22 Miller Int Ltd Fully automatic coupler for excavator arm
KR101093218B1 (ko) * 2009-08-12 2011-12-13 주식회사 에버다임 중장비용 어태치먼트 커플러
GB2473630B (en) * 2009-09-17 2013-08-07 Gary Miller Fully automatic coupler for excavator arm
GB201010269D0 (en) * 2010-06-18 2010-08-04 Hill Ian Hydraulic coupler with attachment pin retention system
ITVR20110041A1 (it) * 2011-03-01 2012-09-02 V T N Europ S P A Attacco rapido di utensili per macchine movimento terra e simili
GB2497965A (en) * 2011-12-22 2013-07-03 Miller Int Ltd Coupler for Attaching an Accessory to an Excavator Arm
CH710006A1 (de) * 2014-08-20 2016-02-29 Josef Martin Gmbh Schnellwechselkupplung zum Ankuppeln eines Anbaugeräts an einem Baggerarm.
JP2016166509A (ja) * 2015-03-10 2016-09-15 ヤンマー株式会社 アタッチメント連結装置
JP2016166508A (ja) * 2015-03-10 2016-09-15 ヤンマー株式会社 アタッチメント連結装置
DE102017130439A1 (de) * 2017-12-19 2019-06-19 Oilquick Deutschland Gmbh Schnellwechsler
DE102018105049A1 (de) 2018-03-06 2019-09-12 Oilquick Deutschland Gmbh Schnellwechsler
DE102020100991A1 (de) 2020-01-16 2021-07-22 Lehnhoff Hartstahl Gmbh Schnellwechsler

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE981051A1 (en) * 1997-12-16 1999-06-16 Redrock Engineering Ltd Attachement device for excavating or digging apparatus
US6902346B2 (en) * 2002-03-15 2005-06-07 Hendrix Manufacturing, Ltd. Hydraulic coupler

Also Published As

Publication number Publication date
EP2119834A3 (fr) 2013-11-27
ITMO20080143A1 (it) 2009-11-16
EP2119834A2 (fr) 2009-11-18

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