EP2732102B1 - Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator - Google Patents

Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator Download PDF

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Publication number
EP2732102B1
EP2732102B1 EP12732687.4A EP12732687A EP2732102B1 EP 2732102 B1 EP2732102 B1 EP 2732102B1 EP 12732687 A EP12732687 A EP 12732687A EP 2732102 B1 EP2732102 B1 EP 2732102B1
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EP
European Patent Office
Prior art keywords
machine
tool
belonging
finger
arm
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.)
Active
Application number
EP12732687.4A
Other languages
German (de)
French (fr)
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EP2732102A1 (en
Inventor
Marcel Morin
Fabrice FAUBRE
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.)
KLAC Industrie SAS
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KLAC Industrie SAS
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 KLAC Industrie SAS filed Critical KLAC Industrie SAS
Publication of EP2732102A1 publication Critical patent/EP2732102A1/en
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Publication of EP2732102B1 publication Critical patent/EP2732102B1/en
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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
    • 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
    • E02F3/3645—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
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/24—Safety devices, e.g. for preventing overload
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/16—Joints and connections with adjunctive protector, broken parts retainer, repair, assembly or disassembly feature

Definitions

  • a quick coupler is a device for attaching a tool to the end of the arm of a hydraulic excavator, or the like, hereinafter referred to as the machine.
  • a quick coupler is a mechanical device comprising two parts, one of which is attached to the tool, one bucket for example, while the other is carried by the arm of the machine.
  • a fastener whose first part, substantially stirrup-shaped and integral with the arm of the machine comprises a cradle, formed by a pair of hooks, which can be inserted under a shaft of the second part carried by the tool.
  • the second part has a hook-shaped extension which can pass through an opening of the first part and an opening of a sliding locking plate which can be inserted under the said extension when the two parts are applied against each other. 'other.
  • Means are provided for maintaining the locking plate in "armed position", that is to say in a position where the hook-shaped extension can freely traverse the middle portion of the first portion and the locking.
  • a quick coupler is designed to be used with a range of machines having different sizes (and therefore different weights).
  • the present invention which aims to overcome this drawback, relates to a safety device that positively prevents the locking of a bucket whose weight load exceeds that of the machine.
  • the safety device of the invention implements means having to oppose this application if the grab bucket exceeds the capacity of the machine.
  • each part of the fastener has a member that can cooperate with an organ of the other part if the weight of the tool under load does not exceed the capacity of the machine, the cooperation being impossible in the contrary case so as to oppose the application of the first part on the second and prevent locking.
  • the fastener comprises two parts 1 and 2, the 1 being fixed to the arm of the machine (not shown) while the 2 is fixed to the upper part of the bucket G.
  • Part 1 has a pair of hooks 3 that can grasp, by a judicious operation of the arm of the machine, a shaft 4, carried by the part 2, and lift the bucket.
  • the part 1 has a member constituted by a finger 7 which can fit freely in a member constituted by a notch 8 of the part 2, the dimensions of these two members depending on the size of the machine and the bucket so that the finger carried by a "small machine” can not penetrate the notch of a "big bucket", the opposite being naturally possible.
  • the figure 4 shows a finger 7 whose width is substantially equal to the width of the notch 8, this finger can freely enter said notch and locking is possible.
  • the finger 7 is carried by a small machine and the notch 8 is carried by a small bucket.
  • the figure 5 shows a finger 7a, narrower than that 7, carried by a large machine.
  • the finger 7a penetrating easily into the notch 8, the locking of a small bucket on a large machine is possible.
  • a large bucket is associated with a notch 8a, narrower than that 8, which can cooperate with a finger 7a.
  • the portion 1 is cut so as to have a projection 9 capable of entering a housing 10 of the part 2 if the bucket to seize does not exceed the capacity of the machine.
  • the figure 9 shows a bucket G whose weight, in load, exceeds the capacity of the machine and whose field 10a is shifted relative to that 9a of the part 1 so that the projection 9, of the "small machine” can not not enter the housing 10 of a "big bucket”.
  • the safety device is arranged on the sides of the parts 1 and 2 extending parallel to the shaft 4, but a similar result could be obtained if this device was located on one, at the least, sides extending substantially orthogonally to said shaft.

Description

La présente invention est relative à un dispositif de sécurité pour les attaches rapides. Une attache rapide est un dispositif permettant de fixer un outil à l'extrémité du bras d'une pelle hydraulique, ou analogue, ci-après dénommée l'engin.The present invention relates to a safety device for quick couplers. A quick coupler is a device for attaching a tool to the end of the arm of a hydraulic excavator, or the like, hereinafter referred to as the machine.

Une attache rapide est un dispositif mécanique comportant deux parties dont l'une est fixée à l'outil, un godet par exemple, tandis que l'autre est portée par le bras de l'engin.A quick coupler is a mechanical device comprising two parts, one of which is attached to the tool, one bucket for example, while the other is carried by the arm of the machine.

L'état de la technique en la matière est constitué, notamment, par le document FR 2946061 .The state of the art in this field consists, in particular, of the document FR 2946061 .

Dans ce document, il est décrit une attache dont la première partie, sensiblement en forme d'étrier et solidaire du bras de l'engin comporte un berceau, formé par une paire de crochets, pouvant s'insérer sous un arbre de la seconde partie portée par l'outil.In this document, it is described a fastener whose first part, substantially stirrup-shaped and integral with the arm of the machine comprises a cradle, formed by a pair of hooks, which can be inserted under a shaft of the second part carried by the tool.

La seconde partie présente une extension, en forme de crochet, pouvant traverser une ouverture de la première partie et une ouverture d'une plaque de verrouillage coulissante, susceptible de s'insérer sous ladite extension lorsque les deux parties sont appliquées l'une contre l'autre.The second part has a hook-shaped extension which can pass through an opening of the first part and an opening of a sliding locking plate which can be inserted under the said extension when the two parts are applied against each other. 'other.

Des moyens sont prévus pour maintenir la plaque de verrouillage en « position armée », c'est-à-dire dans une position où l'extension, en forme de crochet, peut traverser librement la portion médiane de la première partie et la plaque de verrouillage.Means are provided for maintaining the locking plate in "armed position", that is to say in a position where the hook-shaped extension can freely traverse the middle portion of the first portion and the locking.

Lors de la traversée des deux ouvertures, l'extension en forme de crochet libère la plaque de verrouillage qui, sous l'action de ressorts, s'insère sous ladite extension.When crossing the two openings, the hook-shaped extension releases the locking plate which, under the action of springs, fits under said extension.

En général une attache rapide est conçue pour pouvoir être utilisée avec une gamme d'engins présentant des tailles différentes (donc des poids différents).In general, a quick coupler is designed to be used with a range of machines having different sizes (and therefore different weights).

On sait par ailleurs, qu'un engin ne doit pas déplacer une charge, outil compris, dont le poids excède 15%, environ, du poids de ce dernier. Dans ce cas, la charge étant excessive, l'engin peut basculer et provoquer un accident.It is also known that a machine must not move a load, including tool, whose weight exceeds about 15% of the weight of the latter. In this case, the load being excessive, the machine can rock and cause an accident.

En l'état actuel de la technique, force est de constater qu'un « petit engin » peut saisir et manipuler un godet dont la charge excède la capacité de ce dernier.In the current state of the art, it is clear that a "small machine" can seize and manipulate a bucket whose load exceeds the capacity of the latter.

La présente invention, qui à pour but de remédier à cet inconvénient, concerne un dispositif de sécurité qui empêche de façon positive le verrouillage d'un godet dont le poids en charge excède celui de l'engin.The present invention, which aims to overcome this drawback, relates to a safety device that positively prevents the locking of a bucket whose weight load exceeds that of the machine.

Comme on sait que le verrouillage d'un godet ne peut intervenir qu'à la condition que les deux parties de l'attache soient appliquées l'une contre l'autre, le dispositif de sécurité de l'invention met en oeuvre des moyens ayant pour effet de s'opposer à cette application si le godet à saisir excède les capacités de l'engin.As it is known that the locking of a bucket can only take place under the condition that the two parts of the fastener are applied against each other, the safety device of the invention implements means having to oppose this application if the grab bucket exceeds the capacity of the machine.

Selon l'invention, chaque partie de l'attache présente un organe pouvant coopérer avec un organe de l'autre partie si le poids de l'outil en charge n'excède pas la capacité de l'engin, la coopération étant impossible dans le cas contraire de façon à s'opposer à l'application de la première partie sur la seconde et empêcher le verrouillage.According to the invention, each part of the fastener has a member that can cooperate with an organ of the other part if the weight of the tool under load does not exceed the capacity of the machine, the cooperation being impossible in the contrary case so as to oppose the application of the first part on the second and prevent locking.

La présente invention sera mieux comprise par la description qui va suivre faire en se référant aux dessins annexés à titre d'exemple indicatif seulement sur lesquels :

  • la figure 1, montre, en coupe verticale et en perspective, les deux parties de l'attache avant le début de l'accrochage ;
  • la figure 2 est une vue analogue à celle 1, montrant les deux parties de l'attache au début de l'accrochage ;
  • la figure 3 est une vue en perspective montrant le godet verrouillé sur l'engin, la plaque de verrouillage n'étant pas représentée ;
  • les figures 4 à 7 sont des vues schématiques explicitant le fonctionnement du dispositif de sécurité de l'invention ;
  • les figures 8 et 9 sont des vues schématiques analogues à celles 4 et 7, montrant une variante de réalisation.
The present invention will be better understood from the following description given with reference to the accompanying drawings by way of example only, in which:
  • the figure 1 shows, in vertical section and in perspective, the two parts of the fastener before the start of the fastening;
  • the figure 2 is a view similar to that 1, showing the two parts of the fastener at the beginning of the attachment;
  • the figure 3 is a perspective view showing the bucket locked on the machine, the locking plate not being shown;
  • the Figures 4 to 7 are schematic views explaining the operation of the safety device of the invention;
  • the Figures 8 and 9 are schematic views similar to those 4 and 7, showing an alternative embodiment.

Selon la technique connue, l'attache comporte deux parties 1 et 2, celle 1 étant fixée au bras de l'engin (non représenté) tandis que celle 2 est fixée à la partie supérieure du godet G.According to the known technique, the fastener comprises two parts 1 and 2, the 1 being fixed to the arm of the machine (not shown) while the 2 is fixed to the upper part of the bucket G.

La partie 1 présente une paire de crochets 3 pouvant saisir, par une manoeuvre judicieuse du bras de l'engin, un arbre 4, porté par la partie 2, et soulever le godet.Part 1 has a pair of hooks 3 that can grasp, by a judicious operation of the arm of the machine, a shaft 4, carried by the part 2, and lift the bucket.

En faisant pivoter la partie 1 selon la flèche Fi, l'extension usuelle 5 traverse l'ouverture de la partie médiane de la partie 1 ainsi que l'ouverture de la plaque de verrouillage 6 en libérant cette dernière qui, lorsque les deux parties sont appliquées l'une contre l'autre coulisse selon la flèche F2 pour s'insérer sous ladite extension 5.By rotating the part 1 according to the arrow Fi, the usual extension 5 passes through the opening of the middle part of the part 1 and the opening of the locking plate 6 by releasing the latter, which when both parts are applied against the other slide according to the arrow F 2 to fit under said extension 5.

Selon l'invention, la partie 1 présente un organe constitué par un doigt 7 pouvant s'insérer librement dans un organe constitué par une encoche 8 de la partie 2, les dimensions de ces deux organes dépendant de la taille de l'engin et du godet de façon à ce que le doigt porté par un « petit engin » ne puisse pas pénétrer dans l'encoche d'un « gros godet », l'inverse étant naturellement possible.According to the invention, the part 1 has a member constituted by a finger 7 which can fit freely in a member constituted by a notch 8 of the part 2, the dimensions of these two members depending on the size of the machine and the bucket so that the finger carried by a "small machine" can not penetrate the notch of a "big bucket", the opposite being naturally possible.

Selon un mode de réalisation, la figure 4 montre un doigt 7 dont la largeur est sensiblement égale à la largeur de l'encoche 8, ce doigt peut pénétrer librement dans ladite encoche et le verrouillage est possible. Le doigt 7 est porté par un petit engin et l'encoche 8 est portée par un petit godet.According to one embodiment, the figure 4 shows a finger 7 whose width is substantially equal to the width of the notch 8, this finger can freely enter said notch and locking is possible. The finger 7 is carried by a small machine and the notch 8 is carried by a small bucket.

La figure 5 montre un doigt 7a, plus étroit que celui 7, porté par un grand engin. Le doigt 7a pénétrant facilement dans l'encoche 8, le verrouillage d'un petit godet sur un grand engin est donc possible.The figure 5 shows a finger 7a, narrower than that 7, carried by a large machine. The finger 7a penetrating easily into the notch 8, the locking of a small bucket on a large machine is possible.

Comme cela ressort de la figure 6, un grand godet est associé à une encoche 8a, plus étroite que celle 8, pouvant coopérer avec un doigt 7a.As is apparent from the figure 6 a large bucket is associated with a notch 8a, narrower than that 8, which can cooperate with a finger 7a.

Par contre, comme cela ressort de la figure 7, un grand godet auquel est associée une encoche 8a, étroite, ne peut pas être verrouillé sur un petit engin auquel est associé un doigt 7 plus large que ladite encoche 8a.On the other hand, as is apparent from figure 7 , a large bucket with which is associated a notch 8a, narrow, can not be locked on a small machine which is associated with a finger 7 wider than said notch 8a.

Selon une variante de réalisation (fig. 8), la partie 1 est découpée de façon à présenter une saillie 9 susceptible de pénétrer dans un logement 10 de la partie 2 si le godet à saisir n'excède pas les capacités de l'engin.According to an alternative embodiment ( Fig. 8 ), the portion 1 is cut so as to have a projection 9 capable of entering a housing 10 of the part 2 if the bucket to seize does not exceed the capacity of the machine.

La figure 9 montre un godet G dont le poids, en charge, excède les capacités de l'engin et dont le champ 10a est décalé par rapport à celui 9a de la partie 1 de façon à ce que la saillie 9, du « petit engin » ne puisse pas pénétrer dans le logement 10 d'un « gros godet ».The figure 9 shows a bucket G whose weight, in load, exceeds the capacity of the machine and whose field 10a is shifted relative to that 9a of the part 1 so that the projection 9, of the "small machine" can not not enter the housing 10 of a "big bucket".

Il ressort des explications ci-dessus que le dispositif de sécurité est disposé sur les côtés des parties 1 et 2 s'étendant parallèlement à l'arbre 4 mais, un résultat analogue pourrait être obtenu si ce dispositif était situé sur l'un, au moins, des côtés qui s'étend sensiblement orthogonalement audit arbre.It follows from the explanations above that the safety device is arranged on the sides of the parts 1 and 2 extending parallel to the shaft 4, but a similar result could be obtained if this device was located on one, at the least, sides extending substantially orthogonally to said shaft.

Claims (3)

  1. Safety device for quick-fit attachments, comprising two parts (1) and (2), of which one (1) is borne by the arm of the machine while the other (2) is secured to the tool (for example a dipper), the said first part having a cradle (3) formed by a pair of hooks which is capable of catching hold of a shaft (4) belonging to the second part in order to raise the tool and allow the first part to pivot in order to press the two parts against one another to allow locking, characterised in that each part of the attachment has a member (7 or 9) which is capable of cooperating with a member (8 or 10) belonging to the other part if the weight of the tool, when loaded, does not exceed the capacity of the machine, said cooperation being impossible if this is not the case, so as to resist the pressing of the first part onto the second and to prevent locking.
  2. Device according to Claim 1, characterised in that, according to one mode of embodiment, one of the members is constituted by a finger (7) which is capable of penetrating into a slot (8) in the other part, safety being ensured by judiciously dimensioning the slot and finger according to the size of the machine and of the tool in such a way that the finger belonging to a small machine cannot penetrate into the slot belonging to a tool whose weight, when loaded, exceeds the capabilities of the said machine.
  3. Device according to Claim 1, characterised in that one of the members is constituted by a projecting part (9) which is capable of penetrating into a recess (10) in the other part, safety being ensured by judiciously positioning the edge (9a) of the said projection in relation to the edge (10a) of the said recess in such a way that the projection belonging to a small machine cannot penetrate into the recess belonging to a tool whose weight, when loaded, exceeds the capabilities of the said machine.
EP12732687.4A 2011-07-12 2012-05-24 Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator Active EP2732102B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1102186A FR2977903B1 (en) 2011-07-12 2011-07-12 SAFETY DEVICE FOR QUICK FASTENERS FOR ATTACHING A TOOL TO THE END OF THE ARM OF A HYDRAULIC EXCAVATOR
PCT/FR2012/000207 WO2013007885A1 (en) 2011-07-12 2012-05-24 Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator

Publications (2)

Publication Number Publication Date
EP2732102A1 EP2732102A1 (en) 2014-05-21
EP2732102B1 true EP2732102B1 (en) 2016-11-23

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ID=46458554

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12732687.4A Active EP2732102B1 (en) 2011-07-12 2012-05-24 Safety device for quick-fit attachments used for fitting a tool to the end of the arm of a hydraulic excavator

Country Status (4)

Country Link
US (1) US20140241786A1 (en)
EP (1) EP2732102B1 (en)
FR (1) FR2977903B1 (en)
WO (1) WO2013007885A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133121A (en) * 1976-08-18 1979-01-09 Hemphill Charles W Backhoe bucket adapter bushing and pin method and apparatus
JP2859146B2 (en) * 1994-02-28 1999-02-17 株式会社坂戸工作所 Connector for construction work machine
JP2000104276A (en) * 1998-09-29 2000-04-11 Kobe Kenki:Kk Backet mount structure of excavator
FR2946061B1 (en) * 2009-05-29 2011-06-17 Klac Industrie SAFETY DEVICE FOR A QUICK ATTACHMENT FOR FIXING A TOOL AT THE END OF THE ARM OF A HYDRAULIC SHOVEL OR THE LIKE.

Also Published As

Publication number Publication date
WO2013007885A1 (en) 2013-01-17
FR2977903B1 (en) 2013-08-02
FR2977903A1 (en) 2013-01-18
US20140241786A1 (en) 2014-08-28
EP2732102A1 (en) 2014-05-21

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