EP4060124B1 - Anordnung zum sicheren ankuppeln eines werkzeugs an einem arbeitsarm einer baumaschine mit verbesserter funktionsweise - Google Patents

Anordnung zum sicheren ankuppeln eines werkzeugs an einem arbeitsarm einer baumaschine mit verbesserter funktionsweise Download PDF

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Publication number
EP4060124B1
EP4060124B1 EP22162079.2A EP22162079A EP4060124B1 EP 4060124 B1 EP4060124 B1 EP 4060124B1 EP 22162079 A EP22162079 A EP 22162079A EP 4060124 B1 EP4060124 B1 EP 4060124B1
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EP
European Patent Office
Prior art keywords
coupling
tool
connection
safety
finger
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.)
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Application number
EP22162079.2A
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English (en)
French (fr)
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EP4060124A1 (de
EP4060124C0 (de
Inventor
Didier Cinquin
Remi Ratnik
René Sieffert
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Acb Pume
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Acb Pume
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Publication of EP4060124A1 publication Critical patent/EP4060124A1/de
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Publication of EP4060124B1 publication Critical patent/EP4060124B1/de
Publication of EP4060124C0 publication Critical patent/EP4060124C0/de
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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
    • E02F3/365—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

Definitions

  • the present invention relates to a secure coupling assembly of a tool on a working arm of a public works machine with improved operation.
  • the expression public works machine designates any machine, of the self-propelled vehicle type or a stationary machine, positioned on land, on a ship, on a pontoon or on a railway vehicle, equipped with at least one arm at the end of which finds mounted, in a removable manner, a tool such as a shovel, bucket, pliers, chisel, hammer, nacelle, lifting hook, nacelle or any other tool used in the context of so-called heavy work on site, civil engineering, transport, agricultural, mining and quarrying or handling.
  • a tool such as a shovel, bucket, pliers, chisel, hammer, nacelle, lifting hook, nacelle or any other tool used in the context of so-called heavy work on site, civil engineering, transport, agricultural, mining and quarrying or handling.
  • the arms of a public works machine can receive various tools, both by their function and by their size in order to do different jobs. These tools can be movable along one or more axes relative to the end of the arm of the machine.
  • the coupling of a tool on the end of a working arm of a public works machine is carried out by a coupling assembly comprising several parts and known as a quick coupler assembly, more easily designated by the expression "quick hitch" which will preferably be used later.
  • Such a quick coupler makes it possible to couple, without human intervention, the tool to the working arm, in a secure manner.
  • Many systems also allow the tool to be uncoupled from the work arm in a secure manner.
  • the tools used on public works machinery include two parallel connection shafts, allowing coupling with the quick coupler. The latter is provided with members for coupling and locking the shafts of the tool on the attachment.
  • EP-B-1 318 242 a coupler whose translational movement of a cylinder, controlled by the user from the driver's cab of the public works machine, ensures the locking and unlocking of the two coupling members of the quick coupler.
  • WO-A-2020 128,075 describes a locking device in which a cylinder actuates in translation hook-shaped coupling members adapted to hold the shafts of the tool.
  • a blocking flap mounted free in rotation secures the maintenance of a coupling member on a shaft.
  • the unlocking movement of the cylinder is accompanied by the compression of a spring, the latter driving a part bearing against the shutter. The latter is driven in rotation in a position where it no longer opposes the output of the shaft of the holding member.
  • EP-B-2 466 015 discloses a solution where two hooks form the shaft coupling members. A hook is connected directly by a pivoting connection to the rod of a cylinder. The other hook is connected by a pivoting connection to the cylinder rod by an arm.
  • EP-A-2 987 916 describes an actuating member in the form of a tuning fork which slides and pivots a member for locking one of the shafts in position in the attachment. Depending on the position of the organ in the form of a tuning fork, the disengagement of the shafts of the quick coupler is authorized or not.
  • the translational movement of the actuating member, in one direction or the other, is subjected to the action of a jack.
  • the solution marketed by the company DROMONE ENGINEERING comprises a component for locking a member for coupling the quick coupler with a shaft. The coupling member is moved by the action of a jack, the locking flap pivoting into the active position by gravity.
  • WO-A-2018/056841 relates to a quick coupler for coupling a tool.
  • the attachment comprises a jaw, configured in U, fixed and a second jaw mounted on a movable slider under the action of a hydraulic jack. A spring pushes the slider away from one of the jaws.
  • the clip comprises a locking member making it possible to block the connection member and configured in the shape of an L and pivotally mounted.
  • a branch of the locking member forms an actuating element.
  • a finger defining an unlocking element is mounted on the slider. It is moved when the actuator is in translational motion.
  • the movement of the unlocking members as well as the movement of one of the jaws is obtained by hydraulic means.
  • the invention proposes to respond by offering a coupling assembly for a tool on a working arm of a secure public works machine, easy to implement and guaranteeing increased safety in avoiding any risk of unhooking the tool as long as the coupling system is not in the unlocked position, while limiting the number of parts and being adaptable to various types of quick couplers and tools.
  • the subject of the invention is an assembly for coupling a tool to a working arm of a public works machine, comprising a secure connection device called a quick coupler, two parallel connection members fitted to the tool , at least one of the connection members being a cylinder with a circular base, two coupling members with the connection members equipping the secure connection device, the said coupling members defining housings for receiving the connection members, a security member mounted free to rotate between a so-called disengaged position in which it allows the movement of a first connection member equipping the tool with respect to a first coupling member and a so-called engaged position in which it secures the retention of the first connection member by the first coupling member, at least one locking member movable between an inactive position in which the restraint by a second coupling member equipping the secure connection device of the second connection member is not locked and an active position in which it locks the retention by the second coupling member of the second connection member, a release member movable in translation adapted to allow rotation of the safety member from the dis
  • the number of parts is limited, and therefore the risk of malfunction while facilitating maintenance and ensuring optimal safety, accidental dropping of the tool during locking is no longer possible.
  • such a coupling assembly may include one or more of the following characteristics:
  • the safety member comprises a rounded relief or flap, the radius of curvature of which is adapted to the radius of the cylinder with a circular base forming the first connection member, said relief comprising at least three surface segments, planes and curves, adapted to be successively at least facing at least part of the surface of the connection member.
  • a segment of the rounded relief is permanently at least opposite a part of the surface of the first connection member when the latter is in its receiving housing defined by the first coupling member.
  • the safety member is held in the engaged position by a return member.
  • the release member comprises a main body receiving a movable finger in translation in the body.
  • a return member permanently maintains the finger outside the body of the release member.
  • a body position return member maintains the latter in a position in which the finger is at least permanently facing the safety member.
  • the finger comprises at least one contact zone with the safety member and located at a free end of the finger when the retention by the second coupling member of the second connection member is not locked.
  • the finger comprises a notch adapted to receive a ratchet movable in rotation relative to the safety member.
  • the pawl is secured to the safety member, a pin for rotating the pawl being secured to a wall of the quick coupler.
  • the fingertip extends beyond the quick coupler when the safety member is in the disengaged position, forming a visual signal for the user.
  • the locking member comprises a lug configured as a hook movable in translation in slideways.
  • the slides are removably mounted in the quick coupler.
  • the invention also relates to a public works machine provided with at least one working arm fitted with an assembly for coupling a tool to the working arm in accordance with any one of the preceding characteristics.
  • FIG. 1 illustrates an arm 1 of a construction machine, the latter known per se not being illustrated.
  • a construction machine the latter known per se not being illustrated.
  • it is a machine of the mechanical shovel type.
  • a public works machine can be of another type, for example, an excavator, a backhoe, a dredge, a mower, a loading machine or more generally any machine, self-propelled or not, land, railway or maritime equipped with at least one working arm equipped with at least one working tool.
  • work tool 2 is a bucket.
  • it may be another tool, for example a blade, a rock breaker, a pestle, a nacelle, a crushing/clearing head or the like.
  • the free end 3 of the arm 1 is equipped with an articulated lever 4.
  • the end 3 and a free end 5 of the lever 4 are each provided with a rotation shaft 6.
  • the shafts 6 are identical. Alternatively, they are different. These shafts 6 maintain and allow movement, according to the double arrow F, of a secure connection device 7 of the tool 2 on the arm 1. Such a device is frequently designated by the expression “quick hitch” which will also be used later.
  • the quick coupler 7 on the rotation shafts 6 are inserted into orifices of complementary shape 8 provided on a part of the quick coupler 7.
  • the movement of the quick coupler 7, therefore de facto of the tool 2 is possible in one or more planes, knowing that the coupler rapid can authorize, according to its configuration, the rotation of the tool around a vertical axis.
  • the tool 2 can be oriented to work in the direction of the machine or away from the machine.
  • FIG 2 is a larger scale representation of the tool 2 and the quick hitch 7 of the figure 1 , in the uncoupled position, that is to say before the tool 2 is mounted on the arm 1 or once the tool 2 is unhooked from the arm 1. In such a position, there is no no connection, even partial, between the tool 2 and the arm 1.
  • the secure connection device or quick coupler 7 is a set of parts, metallic or made of one or more material(s) resistant to shocks and environmental constraints. As emerges from figures 1 to 14 , the device 7 has the overall shape of a rectangular parallelepiped. It comprises a fixing part 9 on the arm 1. This part 9 forms the upper part of the attachment 7, looking at the figure 2 .
  • a lifting hook 10 In addition to the openings 8 for receiving the rotation shafts 6, it comprises, in the illustrated embodiment, a lifting hook 10.
  • the hook 10 makes it possible, using a sling, to perform lifting operations.
  • part 9 is devoid of a hook 10 or the like. It is understood that the lifting hook 10, when present, may have another shape and/or dimensions than those illustrated in picture 2 .
  • the connection between the part 9 and the arm 1, even if it is removable, generally remains in place, permanently, so that the arm 1 is permanently equipped with the device 7. Thus, no particular maneuver when moving the public works machine is necessary, the arm 1 being always ready to receive a tool 2.
  • the device 7 can also equip the original arm 1 of a public works machine or else equip the arm 1 with a aftermarket public works machine, provided that the orifices 8 are adapted in number, size and position to the rotation shafts 6 fitted to the arm 1.
  • the part 9 is removable in order to to be easily changed to adapt to the configuration of arm 1.
  • the lower part 11 of the device 7, looking at the figure 2 is dedicated to the connection, secured and removable, between the device 7, therefore de facto the arm 1, and the tool 2.
  • the tool 2 comprises at least two connecting members 12A and 12B parallel.
  • at least one of the connecting members is a shaft or cylinder with a circular base.
  • the connection members or shafts 12A and 12B are located on one end 200 of the tool 2. They are positioned and dimensioned to ensure not only a secure connection of the tool 2 to the device 7 but also an easy and efficient operation of the tool 2.
  • the parallel shafts or connection members 12A, 12B are oriented in a direction D substantially orthogonal to a longitudinal axis of the arm 1 when the tool 2 is mounted on the arm 1.
  • the rear connection member relative to the free end 3 of the arm 1 when the tool 2 is mounted on the quick coupler 7, is designated as being the rear connection member, therefore the farthest from the arm 1 at the figure 1 , the connecting member or shaft 12B and as being the connecting member before the connecting member or shaft 12A.
  • the front connection member is the member 12B, the rear member being the member 12A, provided that they are identical.
  • Device 7 is equipped with at least two coupling members 13, 14 with connection members 12A and 12B respectively.
  • member 13 will be designated as front coupling member and member 14 as rear coupling member.
  • Front coupling member 13, located to the left of part 11 looking at the figure 2 is configured as a hook, the opening 15 of which is oriented towards the side 16 defining a lateral edge of the device 7, in this case the left edge looking at the picture 2 connecting the parts 9 and 11.
  • the opening 15 of the coupling member 13 is located closest to the end 3 of the arm 1. It is therefore oriented in the direction of the cabin of the public works machine, not illustrated. Opening 15 defines a housing for receiving connection member 12A.
  • the rear coupling member 14 is configured in a U whose opening 17 is oriented towards the lower edge 18 of the device 7 looking at the figure 2 . Opening 17 defines a housing for receiving connection member 12B.
  • a safety member 19 is mounted on the part 11, at the level of the opening 15 of the coupling member 13. It is shown in perspective at figure 11 and, laterally, alone and on a large scale, at the figure 12 .
  • the safety member 19 is pivotally mounted in a plane P around a rotation shaft 20, of longitudinal geometric axis A20. The pivoting of the member 19 takes place in one direction or the other according to the double arrow F19.
  • the plane P is substantially perpendicular to a plane P1 connecting the rotation shafts 6 and illustrated in figure 2 .
  • the attachment 7 is here equipped with a single safety member 19 as shown in figure 11 .
  • the safety member 19 is a piece of complex geometric shape, as appears in the figure 11 . It is elongated in shape, with a complex cross-section. The dimensions, in particular the length, of the safety member 19 are adapted to the dimensions of the connection member 12A. As emerges from the figure 11 , the ends of the shaft 20 extend beyond the ends of the member 19 and ensure the fixing of the member 19 in the sides of the clip 7. For greater readability, the sides of the clip 7 are not shown in the various figures. It is easily understood that the part 9 of the clip 7 forms a protection for the active members of the part 11 of the clip 7. Thereafter, we will define as active engaged position of the member 19 a position in which it prevents the exit of the connection member 12A from its housing 15. The disengaged position of the member 19 corresponds to a position in which it does not oppose the exit of the member 12A from its housing 15.
  • the safety member 19 comprises, in the lower part looking at the figure 11 And 12 , a part 21 in rounded relief which will subsequently be referred to as the flap.
  • This flap 21 has a radius of curvature adapted to the radius of the cylinder with a circular base forming the connection member 12A.
  • the curvature of the relief 21 is of complex shape, as shown in figure 12 .
  • the curved free edge 210 comprises several surface segments, straight and curved. Each segment performs a given function, in relation to the position of the member 19.
  • a first surface segment 211, straight and generally flat, located to the right of the figure 12 is adapted to face and if necessary provide support against a portion of the connection member 12A when the member 12A is in place in the housing 15 of the coupling member 13, as illustrated in figure 7 , it being understood that the support only occurs if one initiates the movement of the member 12A out of the housing 15.
  • the flap 21, and in particular the segment 211 secures the connection and prevents any uncoupling of the member 12A and of the fastener 7.
  • This position corresponds to a so-called active engaged position of the member 19 and of the flap 21 when the member of connection 12A is in place in its housing 15.
  • a clearance of a few millimeters is provided between the segment 211 and the member 12A.
  • the flap 21 is in the active engaged position, ready to bear against the member 12A present in its housing 15 but without bearing against the member 12A so as not to generate friction between the member 12A and organ 19.
  • segment 212 is arranged angularly.
  • the segment 212 is a release segment, making it possible to avoid any blocking contact between the flap 21 and the member 12A during the respective rotations of these two elements with respect to each other.
  • the width of the segment 212 is the smallest of all the constituent segments of the edge 210.
  • segment 213 comprises a straight portion positioned between two curved portions.
  • the shape of the segment 213 makes it possible, when the member 12A comes out, to rotate the member 19 counterclockwise and therefore to put it in the disengaged position illustrated in figure 10 so that the flap 21 does not oppose the output of the connection member 12A due to its housing 15.
  • the counterclockwise direction is indicated with reference to the figure 12 , i.e. a rotation from right to left looking at the figure 12 .
  • the counterclockwise direction is defined as being the rotation of the safety member 19 in the direction of the side edge 16 of the part 11 of the attachment 7. In this position, the safety member 19 can automatically return to a so-called position reset as illustrated in figure 2 , 2A or 3 .
  • the safety member 19 may not only be in a disengaged position where the safety member 19 cannot oppose an exit movement of the member 12A out of its receiving housing 15 and in an engaged position active_de blocking the exit of the member 12A from its housing 15 as described above but also in another position, called reset, once the member 12A is completely released from its housing 15 and away from the member 19.
  • the safety member 19 In this reset position the safety member 19 is remote from the member 12A, the housing 15 being empty and ready to receive a member 12A, the safety member 19 being ready to move to the disengaged position then to the active engaged position when the member 12A is in place in the housing 15, this in the case of an insertion of the member 12A into its housing 15.
  • the flap 21, and therefore the member 19 is in a position similar to that illustrated in figures 5 to 8 , therefore a position corresponding to the so-called engaged position.
  • the member 19 can therefore occupy, in addition to a disengaged position, an engaged and active position in which it blocks the exit of the member 12A from the housing 15 and an engaged and inactive position where the housing 15 is empty and ready to receive a member. 12A.
  • the implementation of the constituent segments of the free edge 210 of the flap 21 takes place during a translation of the member 12A, in one or the other direction, and induces, by the configuration of the segments 211 to 213, a rotation of the member 19.
  • the rotation of the member 19, and therefore of the flap 21, always takes place in the counterclockwise direction as defined above, therefore a rotation in the direction of the edge 16 of the part 11 of the fastener 7.
  • the dimensions of the flap 21 are such that it extends partially, in the active engaged position and in the inactive engaged position called reset, in the opening 15 defined between the coupling member 13, configured as a hook forming one of the jaws constituting the member 13, and an edge 22 of the part 11 of the fastener 7 constituting the other jaw.
  • a part, not referenced, of the edge 22 is substantially parallel to the rectilinear part 130 of the hook 13 and thus defines with this denier a U.
  • the U-shaped opening 15 forms a housing for receiving the connection member 12A of the tool 2.
  • the hook 13 defines a housing for receiving the connection member 12B, by turning over the tool 2 and provided that the members 12A and 12B are identical.
  • the return to position is obtained by another means, known per se, for example a leaf spring, a tension spring, a compression spring, a cylinder.
  • a return member of the safety member 19 Thanks to the return member of the safety member 19, the passage of the latter between the various positions: engaged and active with blocking of the member 12A in its housing 15, disengaged without blocking of the member 12A in its housing 15, engaged and inactive called resetting, therefore in the absence of the member 12A in its housing 15, is carried out without user intervention, only by the various movements of the member 12A relative to its housing 15 and a release member, described later.
  • Such operation purely mechanical, allows optimum securing of the connection between the member 12A and the attachment 7, whatever the state of this connection.
  • the security member 19 comprises, above the flap 21 looking at the figure 2A And 12 , an inclined face 24 in the direction of the hook 13, and flat over its greater part.
  • the so-called high end 25 of the face 24, therefore that furthest from the hook 13, is curved and oriented inwards, therefore in the direction of the face 24.
  • the face 24 is generally shaped of lacrosse.
  • the end 25 is extended by a flat face 26 and generally orthogonal to a longitudinal axis A20 of the rotation shaft 20.
  • Part 11 receives at least one release member 29.
  • the latter is positioned above the coupling members 13 and 14, in the vicinity of the safety member 19.
  • the release member 29 comprises a finger 30 configured as a cylinder solid with a cylindrical base, the free end 31 of which is generally of a shape complementary to that of the curved end 25 of the safety member 19.
  • the end of the finger 30 is configured as a cylinder with a circular base whose axis longitudinal is perpendicular to the longitudinal axis of the finger 30.
  • the finger 30 is flattened, in the shape of a connecting rod.
  • the end 32 of the finger 30, opposite the end 31, is inserted, removably or not, in a part forming the main body 33 of the release member 29.
  • the body 33 is, in the example, configured as a hollow cylinder with a circular base. Alternatively, it has another shape, for example a parallelepiped.
  • One end 34 of body 33 receives end 32 of finger 30.
  • Opposite end 35, referenced to figure 11 , of the body 33 is connected by a pivot connection to a relief 36 forming a rotation support for the body 33. The rotation of the latter takes place in a plane parallel to the plane P of rotation of the safety member 19.
  • the relief 36 is integral with a tab 38 in the form of a hook and slidably mounted in at least one slide 37.
  • the translation of the tab 38, and therefore of the rotation support 36, takes place in a plane orthogonal to the plane P1.
  • the translation of the tab 38 in the slide 37 is carried out by a displacement means, typically by a cylinder, hydraulic or other. Alternatively, the translation is manual. In all cases, the displacement of the tab 38 is not automatic but requires an action on the part of the user of the coupling assembly, therefore of the driver of the public works machine.
  • the opening of the lug 38 in hook is oriented towards the opening 17 of the first coupling member 14.
  • the lug 38 is dimensioned and positioned so that, during its translational movement in the slide 37, according to the double arrow F36 , it releases or blocks access to the opening 17.
  • the lug or hook 38 makes it possible to block the member 12B in position in the housing defined by the opening 17 of the coupling member 14
  • the hook 38 authorizes or not access, in entry or exit, by the connection member 12B to the housing 17 defined in the coupling member 14 according to the position of the hook 38.
  • the finger 30, forming a first part of the release member 29, is movable in translation in the body 33, according to the double arrow F30.
  • the finger 30 is held, in the inactive position, in a position where it extends to the maximum outside the body 33 by a return member or pusher 39, as illustrated in figure 2 And 2A notably.
  • the return member 39 is, here, a mechanical spring jack. Alternatively, it is another type of return member known per se, for example a pneumatic or hydraulic cylinder. In all cases, the return member 39 acts to permanently push the finger 30 out of the body 33, this whatever the position of the finger and whatever the forces acting on the finger.
  • the body 33 constituting a second part of the release member 29, is provided with a hook 40 whose opening is directed towards the finger 30.
  • This hook 40 is adapted to receive, in a removable manner, one end 41 of a coil spring 42, the other end 43 of which is connected to a hook 44 which is fixed to one face of the tab 38.
  • the spring 42 When the spring 42 is connected to the two hooks 40 and 44, its return force induces a movement pivoting of the assembly of the release member 29 oriented downwards along the double arrow F29, this by rotation of the end 35 of the body 33 around the rotation shaft 45 fitted to the rotation support 36.
  • the coil spring 42 is replaced by another return member, for example a leaf pressure spring positioned above the body 33 and exerting pressure on the body 33 and inducing a pivoting movement of the all of the release member 29 also oriented downwards.
  • the release member 29 is maintained in a position such that it is always in contact or opposite, at least by one zone, in particular its free end. 31, with the safety member 19, in particular with the flap 21, this during the various movements of translation and rotation of the members 19 and 29.
  • the release member 29 is opposite the safety member 19 when the latter is in the active engaged position and is ready to ensure, by contact, the blocking of the member 12A in the housing 15 during an attempt to leave the member 12A out of the housing.
  • the operation of the secure connection device or quick coupler 7 is now described with reference to the various figures 1 to 14 .
  • the operation will first be described during the attachment of a tool 2 to the device 7, therefore during the installation of the tool 2 on the arm 1 of a public works machine, then during the removal of tool 2, for example during a tool change.
  • a safety device comprising sensors placed on the quick coupler 7 and/or the arm 1 and/or the tool 2 informing, by an audible and/or visual signal, that the members 12A, 12B are engaged in the connection members 13, 14 and that the coupling between the tool 2 and the attachment 7 is made and secure.
  • THE figure 2 And 2A illustrate a configuration in which the tool 2 and the quick coupler 7 are completely separated, for example before the assembly or after the disassembly of the tool 2 on the arm 1 of a construction machine, therefore a configuration in which all the constituent elements of the coupling assembly are inactive.
  • the openings or housings 15 and 17 of the coupling members 13 and 14 are completely free and accessible.
  • the safety member 19 is in the position in which the flap 21 extends to the maximum in the housing 15, the latter being empty. This corresponds to an engaged and inactive position of the safety member 19.
  • the face 27 of the safety member 19 is substantially vertical and the face 26 substantially horizontal. The flap 21 is held in this position by the return of the spring 23.
  • the finger 30 of the release member 29 bears against the face 26 of the safety member 19.
  • the free end 31 of the finger 30 is at its top dead center or at the end of its travel, above the locking member 19.
  • the finger 30 and the body 33 of the release member 29 are inclined upwards looking THE figure 2 And 2A , by pivoting of the body 33 around the shaft 45.
  • the restoring force of the spring 42 tends to bring the release member 29 downwards, and therefore to keep it resting on the face 26.
  • the zone contact between the safety member 19 and the finger 30 is formed, respectively, by a portion of the face 26 and a portion of the outer surface of the finger 30, the latter here being cylindrical with a circular base.
  • the safety member 19 is ready to pivot, the release member 29 not opposing a movement of the safety member 19 during the insertion of the member 12A into its housing 15.
  • the pivoting of the member 19 will then be carried out in the counterclockwise direction looking at the figures 2 to 10 , therefore in the direction of the edge 16 of the part 11 of the fastener 7.
  • Such a direction of rotation corresponds to a rotation of the member 19 in the direction of the lower edge 22 of the part 7, tending to bring the edge 27 of the member 19 parallel to edge 22.
  • end 26 of member 19 pivots in the direction of opening 15.
  • the hook lug 38 is at an end-of-travel dead center, corresponding to free and maximum access to the opening 17 of the first coupling member 14.
  • the locking member formed by the leg 38 is in the inactive position.
  • the lug 38 is held in this position by the fact that the cylinder, schematically represented by the reference 370, which actuates the lug 38 and therefore the release member 29, is inactive, in the retracted position.
  • the starting and stopping of the actuator 370 are under the control of the user of the coupling assembly, for example, the driver of the public works machine from the driver's cab or by a user equipped a remote control box and remote from the machine, for example when the latter is automated and does not include a driver's cab.
  • FIG. 3 illustrates an initial phase of positioning the quick coupler 7 to make the connection with the tool 2, the latter being stationary on a surface, the connection members 12A, 12B being accessible, the edge 200 of the tool 2 being oriented upwards.
  • the coupling member 13 opposite the connection member 12A.
  • the contact is initially made by the segment 213 of the flap 21 and the member 12A.
  • the rounded relief 21 has a radius of curvature of the edge 210 adapted to that of the cylinder with a circular base forming the member 12A, so that the contact between these two parts is of the sliding type. In other words, such a type of contact allows the parts to move relative to each other.
  • the translation of the member 12A in the direction of the bottom 131 of the coupling member 13 rotates the safety member 19, through the pivoting of the flap 21, the segments 213 or 212 of the edge 210 being in contact with the member 12A.
  • the safety member 19 then pivots in the counterclockwise direction as defined previously according to the double arrow F19.
  • a visual and/or sound signal for example based on sensors on the device 12A, and/or the segment 211, and/or the member 13 indicates to the user the securing of the coupling between the members 12A and 13. In other words, at this stage, even in the event of swinging of the tool, the latter remains attached to the attachment 7, without risk of falling.
  • the fastener 7 is then positioned as shown in figure 6 . It is now a question of performing the coupling between the two other members 12B and 14, by pivoting the attachment 7 around the member 12A according to the double arrow F7. At the end of the movement, the connection member 12B rests on the bottom 140 of the coupling member 14. In this configuration, the coupling of the members 12B and 14 is not secure, the member 12B being able to come out freely of the member 14, by a pivoting movement in the opposite direction to that described above according to the double arrow F7. In other words, in this position the coupling between the tool 2 and the fastener 7 is not fully achieved, only the connection between the member 12A and the member 13 being secure. It is possible to provide, in another embodiment, a sound and/or light signal indicating to the user that the coupling is not yet complete and secure. For this, there are, for example, contactors on the bottoms 131, 140 of the members 13 and 14.
  • the hook lug 38 To secure the connection between the member 12B and the member 14, the hook lug 38 must move in translation according to the double arrow F36 in the direction of the member 14. This movement is carried out by sliding in the slide 37 .
  • the sliding is advantageously generated by the cylinder 370 controlled by the user, either from the driver's cab of the public works machine or by a remote control.
  • the displacement of the hook or lug 38 is carried out by a manual action, therefore with the intervention of the user, using a device for pushing or pulling the hook 38.
  • the hook or lug 38 which defines a locking member, bears against the member 12B, so in the active position, it locks the retention of the connection member 12B by the coupling member 14.
  • the hook shape of the tab 38 prevents any withdrawal of the member 12B.
  • the safety member 19 In the position illustrated in figure 7 , the safety member 19 is in the active engaged position and secures the retention of the member 12A.
  • the securing of the retention of the member 12A by the safety member 19 is done before the passage to the active position of the locking member 38 which locks the retaining of the member 12B.
  • the locking of the retention of the bodies 12A and 12B is done one after the other.
  • Tool 2 is thus securely coupled with quick coupler 7.
  • the release member 29 has moved back along the double arrow F36, up to a second end of translation stroke.
  • This movement is ensured by the return exerted by the spring 42 on the body 33.
  • This movement directed downwards according to the double arrow F29 is limited by the support 36 which, configured in U, defines a stop to the pivoting of the body 33 and therefore of the finger 30.
  • a sound and/or light signal informs the user of the complete and secure coupling of the tool 2 on the attachment 7.
  • Such light signals can be obtained by color markings of the parts or of parts of component parts of the coupling assembly.
  • sensors attached to the various connection and coupling members are used and generate an audible and/or light signal at the place where the user is located, generally the cab of the public works machine.
  • This movement consists in moving the locking member 38 in the direction of the double arrow F36 but in the opposite direction with respect to the movement having allowed the coupling between the members 12B and 14.
  • the movement aims to move the hook 38 away from the member 12B.
  • This movement brings the end 31 of the finger 30 into contact against the rounded part 25 of the safety member 19.
  • the spring 42 maintains the horizontal position of the body 33 and therefore the finger 30, the body 33 remaining in abutment against the support 36.
  • the release member 29 is pushed back in the direction of the member 13, as illustrated in figure 9 .
  • the body 33 is pivotally mounted around the shaft 45 and the complementary shapes of the end 31 and the face 25, the movement of the finger 30, when continued beyond the simple contact between the face 25 and the end 31, is no longer horizontal, but tends to be slightly curvilinear and inclined upwards, according to the arrow F31 at the figure 9 .
  • the translation movement of the hook 38 induces a thrust of the finger 30 on the face 25 and initiates a rotation of the locking member 19, therefore of the flap 21 around the axis of rotation A20, according to the double arrow F19.
  • the rotation takes place according to the same counterclockwise direction as described above, during the introduction of the member 12A into its housing 15.
  • This movement brings the flap 21 opposite the member 12A.
  • the flap 21_ is in a generally completely disengaged position and therefore substantially coplanar with edge 22 and it no longer opposes the withdrawal of the member 12A, according to the double arrow F 31.
  • the attachment 7 is translated by a translational movement in the opposite direction to that described in figures 3 to 5 , in order to uncouple the organs 12A and 13.
  • the removal of the member 12A takes place with constant contact with the flap 21, in particular with the segment 212 of the flap 21.
  • the tool 2 is completely freed from the secure connection device 7.
  • the member 12A is removed, a sliding contact is made between the segment 213 of the flap 21 and the member 12A.
  • the flap 21, and therefore the safety member 19 is rotated during the translation of the member 12A.
  • the rotation of the safety member 19 therefore takes place counterclockwise as described previously and continues until the end 31 of the finger 30 passes above the member 19 and does not rest on the member. of safety 19 than at the level of the angle 46, in the same position as that illustrated in the figure 4 .
  • a hard stop 190, or, as a variant, an adjustable screw introduced into part of the wall 22 of the attachment 7 limits the rotation of the safety member 19.
  • FIG. 13 And 14 illustrate another embodiment of the invention.
  • the elements common with the previous embodiment have the same references.
  • the distinct elements of this embodiment repeat the references of the elements of the same function of the previous mode, multiplied by 10.
  • a finger 300 which can have a circular, square, rectangular or oval cross-section, is inserted by one end into a body 330 fixed directly on the leg 38. In this way, only a translational movement of the finger 300, in the same direction as the movement of the paw 38, is possible.
  • the length of finger 300 is such that, in the configuration illustrated in figure 13 in which the coupling between the members 12A, 12B, 13 and 14 is locked and secured, it occupies almost all the space available in the attachment 7.
  • a spring, similar to the spring 39 is inserted in the body 330 provides a thrust constant on the finger 300.
  • the finger 300 is provided with a notch 301.
  • the notch 301 is globally with an inclined bottom, in the direction of the body 330, a substantially vertical wall defining the edge of the notch 301 closest to the body 330.
  • _A pawl 302, pivotally mounted on the member 19 is in place in the notch 301.
  • the pawl 302 has a shape and dimensions adapted to those of the notch 301, the latter defining a housing for receiving the pawl 302
  • the pawl 302 is mounted on a return spring in position, not shown.
  • a pivoting of the member 19 is initiated, by means of the pawl 302 engaged in the notch 301, under the push of the finger 300 which moves in translation.
  • the pivoting of the member 19 brings the pawl in the vicinity of a pin 303 secured to one of the walls of the attachment 7.
  • the pin 303 in the example is substantially circular in section. In all cases, the shape and position of the pin 303 are such that when there is contact between the pin 303 and the pawl 302, this induces the tilting of the latter, which releases it from the notch 301.
  • End 304 defines a visual cue for the user, as shown in figure 14 , this once the tool 2 has been released from the clip 7.
  • a signal makes it possible to check the state of the device, locked or not depending on whether or not the finger extends out of the clip 7.
  • the pawl is fixed on the finger 300, a notch being provided on the member 19.
  • the pin 303 is fixed on the member 19, inducing the tilting of the pawl out of the notch.
  • it facilitates the maintenance of the device, by limiting the entry of dust and dirt into the fastener 7.
  • the presence of a single translational movement of the release member allows the use of joint of sealing at the various openings, both in the body 330 and by the opening made in the face of the fastener 7 through which the end 304 of the finger 300 emerges.
  • the risk of operating incident is also limited, the kinematics being simplified.
  • the invention offers, unlike the state of the art, a ternary operation of the safety device, with automatic passage, without human intervention and by mechanical means, between three so-called remarkable positions: an active engaged position of the member 19 in which it blocks the exit of the member 12A from its housing, a disengaged position of the member 19 in which the exit of the member 12A from its housing is possible and an inactive engaged position called resetting of member 19 in which member 19 has no effect on member 12A, the latter being remote from member 19 which, in the engaged position, is ready to redo a connection cycle with member 12A.
  • the slides 37 are mounted in the attachment 7 in a removable manner, facilitating the cleaning of the attachment and its maintenance.
  • the resetting of the safety device 19, or more generally its position is signaled visually and/or audibly to the user.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Agricultural Machines (AREA)
  • Shovels (AREA)
  • Buckles (AREA)

Claims (14)

  1. Kupplungsanordnung eines Werkzeugs (2) an einem Arbeitsarm (1) einer Baumaschine, umfassend eine als Schnellkupplung bezeichnete sichere Verbindungsvorrichtung (7), zwei parallele Verbindungselemente (12A, 12B), die das Werkzeug (2) ausrüsten, wobei mindestens eins der Verbindungselemente (12A, 12B) ein Zylinder mit kreisförmiger Basis ist, zwei Kupplungselemente (13, 14) mit den Verbindungselementen (12A, 12B), die die sichere Verbindungsvorrichtung (7) ausrüsten, wobei die Kupplungselemente (13, 14) Aufnahmesitze (15, 17) der Verbindungselemente (12A, 12B) definieren, ein Sicherheitselement (19), das zwischen einer als ausgerückt bezeichneten Position, in der es die Verlagerung eines ersten Verbindungselements (12A), das das Werkzeug (2) ausrüstet, im Verhältnis zu einem ersten Kupplungselement (13) ermöglicht, und einer als eingerückt bezeichneten Position, in der es den Halt des ersten Verbindungselements (12A) durch das erste Kupplungselement (13) sichert, frei drehbar (F19) angebracht ist, mindestens ein Verriegelungselement (36, 38), das zwischen einer inaktiven Position, in der der Halt des zweiten Verbindungselements (12B) durch ein zweites Kupplungselement (14), welches die sichere Verbindungsvorrichtung (7) ausrüstet, nicht verriegelt ist, und einer aktiven Position, in der es den Halt des zweiten Verbindungselements (12B) durch das zweite Kupplungselement (14) verriegelt, bewegbar (F36) ist, ein translatorisch bewegbares (F30) Freigabeelement (29), das geeignet ist, um eine Drehung (F19) des Sicherheitselements (19) aus der ausgerückten Position in die eingerückte Position zuzulassen, wobei das Freigabeelement (29) mindestens einen translatorisch bewegbaren (F30) Teil (30; 300) umfasst, der auf dem Verriegelungselement (36, 38) befestigt (33) ist, wobei der bewegliche Teil (30; 300) des Freigabeelements (29) angepasst (30, 301) ist, um in Kontakt mit mindestens einer Fläche (26, 46, 25, 24; 302) mit angepasster Form zu sein, die fest mit dem Sicherheitselement (19) verbunden ist, und das Sicherheitselement (19) mindestens eine Fläche (21, 211, 212, 213) umfasst, die angepasst ist, um in Gleitkontakt mit mindestens einer Fläche mit angepasster Form des ersten Verbindungselements (12A) zu sein, wobei der Gleitkontakt eine Drehung (F19) des Sicherheitselements (19) während der Verlagerung des ersten Verbindungselements (12A) aus seinem Aufnahmesitz (15) bewirkt, der durch das erste Kupplungselement (13) definiert ist, dadurch gekennzeichnet, dass die Drehung (F19) des Sicherheitselements (19) während der Verlagerung des ersten Verbindungselements (12A) aus seinem Aufnahmesitz (15), der durch das erste Kupplungselement (13) definiert ist, gegen den Uhrzeigersinn in Richtung einer Kante (22) des unteren Teils (11) der Verbindungsvorrichtung (7) bis zu einer Position erfolgt, in der das Freigabeelement (29) die Rückkehr des Sicherheitselements (19) in eine als Rückstellung bezeichnete Position zulässt, in der das Sicherheitselement (19) vom ersten Verbindungselement (12A) entfernt ist, ohne jegliche Kupplung zwischen dem Werkzeug (2) und der Verbindungsvorrichtung (7), wobei sich mindestens eine Fläche (21, 211, 212, 213) eines Teils (21) des Sicherheitselements (19) in einer als Eingriff bezeichneten Position befindet, die einer Position entspricht, in welcher der Zugriff der Fläche (21, 211, 212, 213) in dem durch das erste Kupplungselement (13) definierten Sitz (15) maximal ist, wobei der Sitz (15) leer ist.
  2. Kupplungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Sicherheitselement (19) ein abgerundetes Relief oder Klappe (21) umfasst, dessen Krümmungsradius an den Radius des Zylinders mit kreisförmiger Basis angepasst ist, der das erste Verbindungselement (12A) bildet, wobei das Relief (21) mindestens drei ebene und gekrümmte Flächensegmente (211, 212, 213) umfasst, die so angepasst sind, dass sie nacheinander mindestens einem Teil der Fläche des Verbindungselements (12A) zugewandt sind.
  3. Kupplungsanordnung nach Anspruch 2, dadurch gekennzeichnet, dass ein Segment (211) des abgerundeten Reliefs (21) mindestens einem Teil der Fläche des ersten Verbindungselements (12A) permanent zugewandt ist, wenn dieses Letztere in seinem Aufnahmesitz (15) ist, der durch das erste Kupplungselement (13) definiert ist.
  4. Kupplungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Sicherheitselement (19) durch ein Rückstellelement (23) in Eingriffsposition gehalten wird.
  5. Kupplungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Freigabeelement (29) einen Hauptkörper (33; 330) umfasst, der einen Finger (30; 300) aufnimmt, der translatorisch (F30) im Körper (33; 330) bewegbar ist.
  6. Kupplungsanordnung nach Anspruch 5, dadurch gekennzeichnet, dass ein Rückstellelement (39) den Finger (30; 300) aus dem Körper (33; 330) des Freigabeelements (29) permanent heraushält.
  7. Kupplungsanordnung nach Anspruch 5, dadurch gekennzeichnet, dass ein Rückstellelement (42) in Position des Körpers (33) diesen Letzteren in einer Position hält, in der der Finger (30) mindestens dem Sicherheitselement (19) permanent zugewandt ist.
  8. Kupplungsanordnung nach Anspruch 5, dadurch gekennzeichnet, dass der Finger (30) mindestens eine Kontaktzone mit dem Sicherheitselement (19) umfasst und sich an einem freien Ende (31) des Fingers (30) befindet, wenn der Halt des zweiten Verbindungselements (12B) durch das zweite Kupplungselement (14) nicht verriegelt ist.
  9. Kupplungsanordnung nach Anspruch 5, dadurch gekennzeichnet, dass der Finger (300) eine Kerbe (301) umfasst, die angepasst ist, um eine Sperrklinke (302) aufzunehmen, die im Verhältnis zum Sicherheitselement (19) drehbeweglich ist.
  10. Kupplungsanordnung nach Anspruch 9, dadurch gekennzeichnet, dass die Sperrklinke (302) fest mit dem Sicherheitselement (19) verbunden ist, wobei ein Stift (303) zum Drehen der Sperrklinke (302) mit einer Wand der Schnellkupplung (7) fest verbunden ist.
  11. Kupplungsanordnung nach Anspruch 9, dadurch gekennzeichnet, dass sich das Ende (304) des Fingers (300) über die Schnellkupplung (7) hinaus erstreckt, wenn sich das Sicherheitselement (19) in ausgerückter Position befindet, wodurch ein optisches Signal für den Benutzer gebildet wird.
  12. Kupplungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass das Verriegelungselement (36, 38) eine als Haken (38) gebildete Nase umfasst, die in Gleitführungen (37) translatorisch (F36) bewegbar ist.
  13. Kupplungsanordnung nach Anspruch 12, dadurch gekennzeichnet, dass die Gleitführungen (37) lösbar in der Schnellkupplung (7) angebracht sind.
  14. Baumaschine, die mit mindestens einem Arbeitsarm (1) versehen ist, der mit einer Kupplungsanordnung (7) eines Werkzeugs (2) an dem Arbeitsarm (1) nach einem der vorhergehenden Ansprüche ausgestattet ist.
EP22162079.2A 2021-03-18 2022-03-15 Anordnung zum sicheren ankuppeln eines werkzeugs an einem arbeitsarm einer baumaschine mit verbesserter funktionsweise Active EP4060124B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2102745A FR3120880B1 (fr) 2021-03-18 2021-03-18 Ensemble de couplage securise d’un outil sur un bras de travail d’un engin de travaux publics a fonctionnement ameliore

Publications (3)

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EP4060124A1 EP4060124A1 (de) 2022-09-21
EP4060124B1 true EP4060124B1 (de) 2023-07-12
EP4060124C0 EP4060124C0 (de) 2023-07-12

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US (1) US20220298742A1 (de)
EP (1) EP4060124B1 (de)
CA (1) CA3150811C (de)
ES (1) ES2955093T3 (de)
FR (1) FR3120880B1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1318242B1 (de) 2001-12-06 2006-10-11 Geith Patents Limited Werkzeugschnellkupplung zum Kuppeln eines Anbauteils an einen Baggerarm und die Werkzeugschnellkupplung umfassend ein Steuerungssystem
KR101093218B1 (ko) 2009-08-12 2011-12-13 주식회사 에버다임 중장비용 어태치먼트 커플러
CH710006A1 (de) 2014-08-20 2016-02-29 Josef Martin Gmbh Schnellwechselkupplung zum Ankuppeln eines Anbaugeräts an einem Baggerarm.
AU2017330165B2 (en) * 2016-09-20 2023-01-05 Attach2 Limited Quick hitch coupler
GB2576486B (en) * 2018-06-25 2023-05-10 Miller Uk Ltd Coupler
GB2580109A (en) 2018-12-21 2020-07-15 Geith International Ltd A coupler for coupling an attachment to a dipper arm

Also Published As

Publication number Publication date
ES2955093T3 (es) 2023-11-28
CA3150811C (fr) 2024-05-28
FR3120880A1 (fr) 2022-09-23
CA3150811A1 (fr) 2022-09-18
US20220298742A1 (en) 2022-09-22
FR3120880B1 (fr) 2023-11-10
EP4060124A1 (de) 2022-09-21
EP4060124C0 (de) 2023-07-12

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