EP2010720B1 - Dispositif de couplage d'un outil à la flèche d'un engin tel qu'une pelle hydraulique - Google Patents

Dispositif de couplage d'un outil à la flèche d'un engin tel qu'une pelle hydraulique Download PDF

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Publication number
EP2010720B1
EP2010720B1 EP07731320A EP07731320A EP2010720B1 EP 2010720 B1 EP2010720 B1 EP 2010720B1 EP 07731320 A EP07731320 A EP 07731320A EP 07731320 A EP07731320 A EP 07731320A EP 2010720 B1 EP2010720 B1 EP 2010720B1
Authority
EP
European Patent Office
Prior art keywords
coupler
interface
hooks
bar
coupling
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
EP07731320A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2010720A1 (fr
Inventor
Serge Morin
Philippe Jandard
Rémi Coudert
René Sieffert
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.)
Ateliers de Constructions du Beaujolais
Morin Sas
Original Assignee
Ateliers de Constructions du Beaujolais
Morin 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 Ateliers de Constructions du Beaujolais, Morin Sas filed Critical Ateliers de Constructions du Beaujolais
Publication of EP2010720A1 publication Critical patent/EP2010720A1/fr
Application granted granted Critical
Publication of EP2010720B1 publication Critical patent/EP2010720B1/fr
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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
    • E02F3/3627—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
    • E02F3/364—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
    • 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
    • E02F3/369—Devices to connect parts of a boom or an arm

Definitions

  • the present invention relates to a coupling device of a tool at the end of the boom of a machine such as a hydraulic shovel.
  • this coupling device has a number of disadvantages.
  • the gripping of the tool placed on the ground with a view to its coupling imposes an alternating movement of the coupler.
  • the coupler must be brought closer to the arrow so that the hooks grip the bar connected to the tool then, in a second step, the coupler must be moved away from the arrow to get closer to the interface and allow locking.
  • this reciprocating motion is relatively complex and time consuming to execute. This is accentuated by the fact that the visibility of the operator during this operation is reduced because the coupler hides the area of the hooks and the locking system.
  • the risk of losing the tool in the locking phase is important because the distance of the coupler relative to the arrow can lead to the output of the bar of the tool out of the hooks.
  • the present invention aims to overcome the disadvantages mentioned above.
  • the invention relates to a coupling device of the aforementioned type, in which the opening of the hooks is directed towards the outside of the device, opposite said coupling zones, in the coupled position. coupler and interface.
  • the hooks are arranged so that the pivoting of the coupler relative to the arrow about its pivot axis and in a given direction can cause the engagement of the bar connected to the tool in said hooks and the approximation of the coupling zones. by rotation about the axis of the interface bar relative to the coupler.
  • the coupling zone of the coupler forms a cavity and the coupling zone of the interface forms a protruding portion adapted to be engaged in said cavity, the protruding portion and the cavity having through orifices. aligned in the coupled position, in which is inserted at least one bolt belonging to the second locking means of the coupler, the bolt being arranged to press an end face of the projecting portion of the interface against the bottom of the cavity of the coupler in locking position.
  • the coupling operation of the interface and the coupler does not require reciprocating movement and does not involve any risk of loss of the tool. Indeed, "winding" of the hooks around the bar causes the relative movement of the interface and the coupler to the coupled position.
  • each hook has substantially the shape of a U, each leg of which comprises an arcuate entrance surface centered substantially on the pivot axis of the coupler, said input surfaces being angularly offset. relative to one another and intended to guide the bar towards the bottom of the hook when the coupler pivots relative to the arrow about its pivot axis.
  • the upper surface located foremost thus allows the initial positioning of the coupler relative to the tool and its guidance, while the lower rearmost surface allows, when the bar rests on it, to lift the tool after pivoting of the coupler.
  • each hook may comprise a first substantially flat portion and parallel to the median longitudinal plane of the coupler, intended to cooperate with a lateral face of the interface, extended by a second portion inclined towards said median longitudinal plane when one gets closer to the first flat part.
  • This allows to guide the movement of engagement of the bar in the hooks, as well as the lateral centering of the interface relative to the coupler.
  • This geometry is all the more interesting because the operator only has two degrees of freedom in rotation (boom and coupler) to perform the coupling operation of the tool to the arrow, and no longer three (the third degree of freedom corresponding to the rotation of the bucket with respect to the arm in the most usual case of a bucket quick coupler fixed at the end of the arm).
  • the first locking means of the coupler may comprise a bolt which, in the locking position, passes through the hook so as to form a retaining housing of the bar against the bottom of the hook.
  • first and / or second locking means may be movable in translation between their locking position and their release position.
  • locking means movable in rotation a much more compact system is obtained, requiring fewer parts and a simplified control system.
  • a face of the bolt intended to come into contact with the interface or the bar, opposite the coupler is inclined with respect to its direction of displacement, so that the displacement of said bolt towards the locking position plates a face. of the interface or a face of the bar against a face of the coupler. Thanks to this structure, it is possible to make up the existing clearance between the different parts and to obtain a satisfactory locking.
  • the ends of the bar, intended to be engaged in the hooks are each surrounded by a sleeve
  • the sleeve may have a flat surface intended to cooperate with the inclined face of the bolt of the first locking means.
  • the invention relates to a machine such as a hydraulic excavator, comprising on the one hand an arrow at the end of which is mounted a coupling device as previously described, the pivot axis of the coupler being located substantially in the central portion of the coupler, and secondly a cylinder mounted on the boom and connected to a first end portion of the coupler to pivot it relative to the arrow, the hooks being formed at the second end portion of the coupler.
  • the opening of the hooks is directed towards the arrow, which makes it possible to obtain very good visibility for the operator having to grip the tool.
  • the figure 1 represents a machine 1 such as a hydraulic excavator, having an arrow 2.
  • a coupler 3 intended to be coupled to an interface 4 itself mounted on a tool 5, in order to allow the coupling of this tool to the arrow.
  • the tool 5 illustrated on the figure 1 comprises an arm 6 and a bucket 7, but the invention applies to the coupling of other tools, such as hammers, hydraulic clamps, etc.
  • the coupler 3, illustrated more particularly on the Figures 3 and 4 comprises, substantially in its central part, a bearing 8 of axis 9 for mounting the coupler 3 to the free end of the boom 2 pivotally about the axis 9.
  • the coupler 3 comprises a bearing 10 of axis 11 substantially parallel to the axis 9, intended to cooperate with a cylinder 12 mounted on the arrow 2, to enable the pivoting of the coupler 3 about the axis 9.
  • the coupler 3 comprises two lateral hooks 13.
  • the axes 9, 11 are substantially horizontal and orthogonal to the arrow 2. It is with respect to these axes that the terms "transverse” and “lateral” are used.
  • the median longitudinal plane of the machine 1 and the coupler 3 is also defined as being their vertical plane of symmetry, orthogonal to the axes 9, 11.
  • the hooks 13 are intended to receive the lateral parts of a bar 14 connected to the tool 5, the bar 14 can either be directly attached to the tool 5 ( figure 1 ) be part of the interface 4 ( Figures 6 and 7 ).
  • each hook 13 has substantially the shape of a U having first and second legs 15, 16 and a bottom 17.
  • the first leg 15 is located closer to the axis 9 than the second leg 16 and is more long as this last.
  • the branches 15, 16 have at their end opposite the bottom 17 an inlet surface 18, 19 in the form of a circular arc centered substantially on the pivot axis 9 of the coupler 3.
  • the input surfaces 18, 19 are angularly offset from one another by an angle ⁇ of the order of 15 to 25 °, the input surface 18 of the first branch being further away from the bottom 17 than the input surface 19 of the second limb 16.
  • first leg 15 may comprise at its free end a bearing surface 23 curved towards the inside of the hook 13.
  • each hook 13 substantially has a semicylindrical profile with axis 20 and forms the support surface of the bar 14 in the coupled position of the coupler 3 and the interface 4.
  • the bottom 17 of the hook 13 is connected to the surfaces of the hook 13. 18, 19 by two connecting surfaces 21, 22 substantially flat and tangent to said bottom 17.
  • the connecting surfaces 21, 22 are inclined up and down from the opening of the hook 13 towards the bottom 17, during the steps leading to the coupling of the coupler 3 and the interface 4.
  • each hook 13 When the coupler 3 is seen from the side (see figures 1 and 6 ), if a line is drawn between the axis 11 of the bearing 10 and the axis 20 of the bottom 17, the opening of each hook 13 is directed towards the line containing the pivot axis 9 of the coupler 3 In addition, in the embodiment shown, the branches 15, 16 of each hook 13 extend generally perpendicularly to this line.
  • the hooks 13 form two housing receiving an end portion of the bar 14, as illustrated in particular on the figure 4 .
  • Each housing is delimited by the bottom 17 of the hook 13, as well as the branches 15, 16, which are connected and closed laterally by a substantially longitudinal wall 24.
  • the receiving housing of the bar 14 is also provided with openings for the entry of said bar into the housing.
  • Orifices 27 are formed in the first and second branches 15, 16. Their function will be indicated later.
  • each branch 15, 16 has a substantially flat portion 28 and parallel to the median longitudinal plane of the coupler 3, here substantially in the form of a ring ( Figures 3 and 4 ), extended by an inclined portion 29 towards said median longitudinal plane when approaching the flat portion 28.
  • the coupler 3 also comprises, in addition to the hooks 13, a coupling zone situated close to the bearing 10, designed to cooperate with a coupling zone formed on the interface 4.
  • the coupling zone of the coupler 3 forms a cavity 30, open opposite the hooks 13, and substantially parallelepiped shape.
  • each hook 13 is directed towards the outside of the coupling device comprising the coupler 3 and the interface 4.
  • each hook 13 is open opposite the zone coupling of the coupler 3.
  • the opening of each hook 13 is directed towards the arrow 2, at least during the gripping phase of a tool 5 placed on the ground, which allows the operator to benefit from excellent visibility for the movements to be performed during this phase.
  • the coupling zone of the interface 4 forms a projecting portion 31 able to be engaged in the cavity 30 of the coupler 3 ( figure 6 ), and therefore preferably has a shape complementary to that of said cavity 30.
  • the projecting portion 31 and the cavity 30 comprise longitudinally-opening orifices, respectively 32, 33, which are aligned in the coupled position of the coupler 3 and the interface 4.
  • the interface 4 also comprises a bar 14 of axis 34 extending transversely away from the projecting portion 31.
  • the bar 14 comprises a cylindrical rod 25 whose end portions project laterally from the interface 4, so as to It can be engaged in the hooks 13.
  • Each of these extreme lateral parts is capped with a sleeve 35 having a cylindrical wall 36 having on one side a bottom 37 adjacent to the corresponding end of the cylindrical rod 25 and the other side an annular flange 38 bearing against the lateral face of the interface 4.
  • the sleeves 35 are fixed to the cylindrical rod 25, for example by means of screws 39.
  • each sleeve 35 further has, on its cylindrical wall 36, a flat surface 40 arranged to be substantially orthogonal to the connecting surfaces 21, 22 of the hooks 13 when the bar 14 is housed in the hooks 13.
  • the displacement direction 43 is generally perpendicular to the branches 15, 16 of the hook 13, as illustrated in FIG. figure 5 .
  • the bolt 41 has a bearing face 44 which is inclined relative to this direction 43 of the same angle as the flat surface 40 formed on the sleeve 35. This inclination is provided so that when the bolt 41 is moved in the direction 43 to its position locking, the clearance between the bolt 41 and the sleeve 35 decreases. In the locking position, the bolt 41 plates the sleeve 35 against the bottom 17 of the hook 13, thus ensuring effective maintenance.
  • the bolt 45 has a bearing face 48 inclined relative to the direction of displacement 47, as illustrated in FIGS. Figures 11 to 13 , the corresponding bearing face 49 of the interface 4, intended to come into contact with the bearing face 48 of the bolt 45, being inclined at the same angle with respect to this direction 47.
  • This inclination is intended so that when the bolt 45 is moved in the direction 47 to its locking position, the clearance j between the bolt 45 and the interface 4 decreases.
  • the bolt 45 plates the end face 50 of the projecting portion 31 of the interface 4 against the bottom 51 of the cavity 30 of the coupler 3, thus ensuring effective maintenance.
  • each hook 13 rotates around the corresponding sleeve 35, being guided by the input surface 18 of the first branch 15, until the second branch 16 passes under the sheath 35 and thus allows the lifting thereof.
  • the figure 9 corresponds to the beginning of the lifting of the tool 5 by the arrow 2, especially through the input surface 19 of the second branch 16 and the connecting surface 22.
  • the figure 10 shows the tool 5 partially detached from the ground and the sleeves 35 completely in place in the hooks 13.
  • the locking process can begin, as shown on the Figures 11 to 13 for the second locking means (the operation for the first locking means being identical).
  • the actuator 46 causes translation of the bolt 45 initially retracted according to its direction of movement 47.
  • the bearing faces 48, 49 respectively of the bolt 45 and the coupler 3 come closer because of their inclination with respect to the direction 47, the clearance j gradually decreasing with the advance of the bolt 45.
  • the interface 4 is immobilized against the coupler 3 by the cooperation between the surfaces 50, 51 on the one hand and 48, 49 on the other hand.
  • the actuator 46 provides a constant hydraulic action in the locking direction, the maintenance of the interface 4 to the coupler 3 is thus completely guaranteed.
  • the device according to the invention allows a recovery of the most frequent and the most important efforts developed by the piston side of the cylinder 12 and the reactions of the tool to the ground by surfaces (17, 36) and (50, 51) belonging to the structure of the coupler and the interface respectively, hooks 13 and bar 14, and cavity 30 and projecting portion 31.
  • the reliability of the device and its evolution over time is thus increased.
  • the figure 14 represents the machine 1 in the first installation phase of the tool 5 (here an arm 6).
  • the arm 6 is substantially brought into contact with the ground by action on the jacks of the arms of the machine 1.
  • the bolts 41, 45 are in locking position, and the machine is at a distance d1 from a ground mark. In this position, the bolts 41, 45 can be moved to their release position without risk of falling of the tool, the latter being in contact with the hooks 13 of the coupler 3 via the interface 4.
  • the arm 6 is moved by action on the jacks of the machine 1 and forward movement of the machine 1, until it comes into complete contact with the ground ( figure 15 ).
  • the locking means are in the release position, and the rotation of the interface 4 relative to the coupler 3 has taken place.
  • the machine 1 is at a distance d2 less than d1 from a ground mark.
  • the arm 6 is completely released from the coupler 3 and deposited on the ground, by acting on the jacks of the machine 1 ( figure 16 ).
  • the machine 1 is at a distance d3 less than d2 from a ground mark.
  • the figure 17 illustrates a variant in which the jack 12 actuating the coupler 3 is placed under the arrow 2 and not above it as is the case on the Figures 1 to 16 .
  • This arrangement is particularly suitable for tools 5 used for working at height.
  • the hooks 13 are located in the upper part of the coupler 3 (the attachment device being similar to that described above, but arranged symmetrically with respect to a horizontal plane).
  • the invention provides a decisive improvement to the prior art, providing a coupling device that allows the rapid replacement of a tool by another on the boom of a machine. Due to the particular orientation of the hooks, this replacement is very easy because it is performed by pivoting the coupler in one direction. The orientation of the opening of the hooks towards the machine also allows the operator to benefit from a very good visibility.
  • the contact surfaces between the interface 4 and the coupler 3 are arranged in such a way that they directly absorb the greatest forces resulting from the jack 12. Conversely, the smaller forces resulting from the jack 12 are taken up by the system. locking. On the contrary, in the prior art, it is the locking system, that is to say a movable part, which took up the maximum forces, which is not optimal mechanically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Earth Drilling (AREA)
EP07731320A 2006-04-21 2007-04-19 Dispositif de couplage d'un outil à la flèche d'un engin tel qu'une pelle hydraulique Active EP2010720B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0603558A FR2900169B1 (fr) 2006-04-21 2006-04-21 Dispositif de couplage d'un outil a la fleche d'un engin tel qu'une pelle hydraulique
PCT/FR2007/000656 WO2007122320A1 (fr) 2006-04-21 2007-04-19 Dispositif de couplage d'un outil à la flèche d'un engin tel qu'une pelle hydraulique

Publications (2)

Publication Number Publication Date
EP2010720A1 EP2010720A1 (fr) 2009-01-07
EP2010720B1 true EP2010720B1 (fr) 2012-02-15

Family

ID=37487586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07731320A Active EP2010720B1 (fr) 2006-04-21 2007-04-19 Dispositif de couplage d'un outil à la flèche d'un engin tel qu'une pelle hydraulique

Country Status (5)

Country Link
EP (1) EP2010720B1 (es)
AT (1) ATE545739T1 (es)
ES (1) ES2381284T3 (es)
FR (1) FR2900169B1 (es)
WO (1) WO2007122320A1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2557934B (en) * 2016-12-16 2021-10-06 Bamford Excavators Ltd Arm assembly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6428265B1 (en) * 2000-10-30 2002-08-06 Gilmore Industries, Inc. Power coupling mounting for a quick-disconnect coupling on a heavy-duty machine
US6902346B2 (en) * 2002-03-15 2005-06-07 Hendrix Manufacturing, Ltd. Hydraulic coupler
US6996926B2 (en) * 2002-06-24 2006-02-14 Jrb Attachments, Llc Arm assembly for excavation apparatus and method of using same
WO2004016863A1 (en) * 2002-08-16 2004-02-26 Simon Robert Ward A connector
FR2854909B1 (fr) * 2003-05-13 2006-08-04 Const Du Beaujolais Atel Dispositif de couplage d'un outil a l'extremite de la fleche d'un engin, tel qu'une pelle hydraulique

Also Published As

Publication number Publication date
EP2010720A1 (fr) 2009-01-07
ES2381284T3 (es) 2012-05-24
ATE545739T1 (de) 2012-03-15
FR2900169B1 (fr) 2010-04-16
FR2900169A1 (fr) 2007-10-26
WO2007122320A1 (fr) 2007-11-01

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