EP4089236B1 - Schnellkupplung mit verriegelungsvorrichtung für eine baggerschaufelkupplung - Google Patents

Schnellkupplung mit verriegelungsvorrichtung für eine baggerschaufelkupplung Download PDF

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Publication number
EP4089236B1
EP4089236B1 EP22169578.6A EP22169578A EP4089236B1 EP 4089236 B1 EP4089236 B1 EP 4089236B1 EP 22169578 A EP22169578 A EP 22169578A EP 4089236 B1 EP4089236 B1 EP 4089236B1
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EP
European Patent Office
Prior art keywords
locking
bush
pin
quick release
release 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
EP22169578.6A
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English (en)
French (fr)
Other versions
EP4089236C0 (de
EP4089236A1 (de
Inventor
António Marco NEVES CRUZ
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.)
Ribalde Fabrica Equipamentos de Movimentacao de Terras e Cargas Lda
Original Assignee
Ribalde Fabrica Equipamentos de Movimentacao de Terras e Cargas Lda
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Publication of EP4089236A1 publication Critical patent/EP4089236A1/de
Application granted granted Critical
Publication of EP4089236C0 publication Critical patent/EP4089236C0/de
Publication of EP4089236B1 publication Critical patent/EP4089236B1/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
    • E02F3/3622—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
    • E02F3/3631—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 transversal 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
    • E02F3/3636—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using two or four movable transversal pins
    • 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
    • E02F3/3645—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with auto-engagement means for automatic snap-on of the tool coupler part
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3672—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where disengagement is effected by a mechanical lever or handle

Definitions

  • the present description concerns a locking device for quick release couplings of earth moving equipment. More specifically, it concerns a locking device for quick release couplings of excavators, backhoes and loaders, among other equipment.
  • Locking devices are used in earthmoving equipment such as excavators, wherein an element such as the excavating bucket can be quickly fixed or removed from the earthmoving equipment.
  • the quick release coupling allows a machine operator to secure the equipment without moving from the cab or the machine's operating position.
  • quick release couplings comprise a pair of parallel pins for coupling to the machine arm.
  • a pair of recesses are formed in the body of the coupler and are configured for receiving the parallel pins of the equipment.
  • One or more locking mechanisms lock the received pins in one or both recesses.
  • Prior art document US 2010/067982 A1 shows an example of this type of quick release couplings.
  • a problem that may arise is that the operator of a machine may move the part of the machine to which the quick release coupling is fixed before the rear coupler pin is fixed or the locking mechanism is actuated before the pin is in position on the mounting part. This can happen because experienced operators tend to position a quick release coupling with the equipment, lock the quick release coupling and move the instrument all in one action. This problem leads to the operation not going as intended and when the equipment is moved, the excavating bucket may fall and be damaged or even injure others.
  • the present solution intends to provide an automatic locking device to be applied, among other applications, in a quick release coupling of earthmoving machinery equipment in order to be more efficient, safe and to work automatically.
  • the present description concerns an automatic locking device to be applied in various equipment, being preferably applied to a quick release coupling of earthmoving equipment.
  • the automatic locking device (quick coupler or quick hinge) described in the present disclosure meets the automatic safety required by the ISO 13031:2016 standard.
  • This device allows the automatic closing of at least one safety side pin, for locking and securing equipment in earthmoving machines.
  • the mechanism can be used (although not exclusively) in systems for quick release coupling of excavation machinery equipment.
  • the mechanism complies with the legislation in force on the safety of excavating machines, which requires a safety system with automatic locking during equipment change operations.
  • the locking device allows the automatic locking and anti-rotation of a system. For security reasons, its unlocking is always done manually.
  • the system is automatically locked by an external force that causes the device to rotate. This rotation will actuate a jaw locking pawl, causing a rotation of the wedged bushes and consequent opening of the side pins after centering with an existing hole in the system, thus locking it.
  • the locking system maintains the coupler in the normal working position by a system of at least two components that engage perpendicularly to the working forces so that the working forces do not tend to cause detachment.
  • the system is unlocked by turning the device's manual actuator, causing the side pins to close, unlocking the system. That is, the side pin moves between a retracted unlocking position and a protruding locking position.
  • the present description relates to a quick release coupling for an excavator bucket coupler comprising a jaw for engaging and holding a bucket pin and a locking device for locking said jaw in a holding position of said bucket pin, wherein the locking device comprises:
  • the locking device comprises:
  • one end of the supporting bush has said wedge-shaped tilted surface to cooperate with the tilted surface of the locking bush, and one end of the locking bush has said wedge-shaped tilted surface to cooperate with the tilted surface of the supporting bush;
  • the locking device comprises a hollow guide cylinder comprising mounted therein:
  • the guide cylinder comprises the socket for receiving the manual actuator to rotate the guide cylinder and move said side pin into the retracted position.
  • the supporting bush is mounted around the cavity or hole of the quick release coupling.
  • the quick release coupling comprises a lever as manual actuator.
  • the locking device comprises:
  • the locking device comprises: a second locking spring arranged to bias the second side pin into the protruding position; and wherein said socket is arranged to receive said manual actuator for moving the second side pin into the retracted position.
  • the device comprises a plurality of locking springs.
  • the quick release coupling comprises a second supporting bush, a second locking bush and a second synchronizing pin.
  • the supporting bush comprises at least one bore to receive one or more fixing screws or bolts for fixing the supporting bush in the jaw.
  • the quick release coupling comprises said fixing screws or bolts fixing the supporting bush in the jaw.
  • the locking system is a locking system:
  • the present description concerns a locking device for quick release couplings of earth moving equipment.
  • the present description relates to a quick release coupling (18) for an excavator bucket coupler (15) comprising a jaw (8) for engaging and holding a bucket pin (14) and a locking device for locking said jaw in a holding position of said bucket pin (14), wherein the locking device comprises: a side pin (3) arranged to move between a retracted unlocking position and a protruding locking position wherein the pin enters a cavity or hole (17) of the bucket coupler to prevent relative movement between the jaw and the bucket coupler; a locking spring (5) arranged to bias the side pin (3) into the protruding position; and a socket for receiving a manual actuator (9) for moving said side pin (3) into the retracted position.
  • Fig. 1 is a schematic representation of a preferred embodiment wherein (1) represents connecting elements, (2) represents a supporting bush; (3) represents the side pin; (4) represents a locking bush; (5) represents the locking spring; (6) represents the synchronizing pin; (7) a guide cylinder; (9) a manual actuator, preferably a lever and (8) represents the jaw of the quick release coupling.
  • the device system comprises one or more screws at each side end.
  • the system comprises one or more locking springs (5), preferably two locking springs, two locking bushes (4), two side pins (3), two supporting bushes (2), two pins (6) and a plurality of screws (1).
  • the pins are automatically actuated by one or more locking springs (5).
  • the hanger plates of the quick release coupling (16) comprise a cavity or hole (17) that will receive the side pin (3).
  • Fig. 2 is a side inner view of an embodiment, wherein the interaction of the various elements forming the locking system is visible.
  • the shaft of the jaw (10); the jaw closing spring (12); the jaw locking pawl (13); the bucket pin (14); the coupler for the bucket (15) and the coupler hanger plates (16) are visible.
  • Fig. 3 represents an embodiment showing the bucket coupler (15) and the quick release coupling (18) comprising the locking device.
  • the quick release coupling (18) further comprises a jaw closing spring (12), jaw shaft (10) and a cylinder comprising an inlet for lubricating the jaw shaft (10).
  • the lubrication inlet (11) comprises a cover.
  • the hanger plates (16) comprise a hole or cavity (17) for the passage of the pins, when in the protruding position.
  • Figures 4a and 4b represent an embodiment of the quick release coupling (18) with the locking device wherein the manual actuator (9) is directed upwards, which causes the opening of the side pins (3) of the system and the corresponding system lock.
  • the side pins (3) are inserted in the hole of the supporting bushes (2) and are inserted in the cavity or hole of the quick release coupling (17), in the locking position. In this position, the relative movement between the jaw and the bucket coupler (15) is prevented.
  • Figures 5a and 5b represent an embodiment of the quick release coupling (18) with the locking device wherein the manual actuator (9) is directed downwards, which causes the opening of the side pins (3) of the system and the resulting system unlock.
  • the side pin (3) is in a retracted unlocking position and the relative movement between the jaw and the bucket coupler (15) is free.
  • the side pin (3) advances laterally by the action of one or more locking springs (5).
  • the supporting bush (2) and locking bush (4) have a tilted face.
  • the supporting bush (2) is fixed to the quick release coupling (8) by the action of the screws (1).
  • the rotation and advancement of the locking bush (4) with respect to the guide cylinder (7) is limited by the synchronizing pins (6).
  • the automatic closing of the side pin (3) is guaranteed by the action of the locking springs (5).
  • the manual opening of the side pin (3) is done with the manual rotation of the lever (9), causing a relative rotation between the supporting bush (2) and the locking bush (4) and consequent recoil of the side pin (3).
  • the jaw (8) is the connecting interface between the system and an equipment of the earthmoving machine.
  • the solution has two independent side pins that are automatically actuated by locking springs (5).
  • Fig. 6 is a schematic representation of a preferred embodiment of the quick release coupling (18) and the locking device.
  • the quick release coupling (18) the jaw (8), the jaw shaft (10); the lubrication inlet (11); the screws (1); the supporting bush (2); the side pin (3); the locking bush (4); the locking spring (5); the synchronizing pin (6); the hollow cylinder (7); the lever (9).
  • the present description describes a quick release coupling (18) for an excavator bucket coupler (15) comprising a jaw (8) for engaging and holding a bucket pin (14) and a locking device for locking said jaw (8) in a holding position of said bucket pin (14).
  • the locking device comprises: a side pin (3) arranged to move between a retracted unlocking position and a protruding locking position wherein the pin enters a cavity or hole (17) of the bucket coupler (15) to prevent relative movement between the jaw and the bucket coupler; a locking spring (5) arranged to bias the side pin into the protruding position; and a socket for receiving a manual actuator (9) for moving said side pin (3) into the retracted position.
  • the locking device comprises a locking bush (4) fixed to the side pin (3); a supporting bush (2) fixed to the jaw (8).
  • the locking bush (4) comprises a tilted surface and the supporting bush (2) comprises a tilted surface arranged so that when the locking bush (4) is moved relative to the supporting bush (2), the tilted surfaces cooperate with each other, so that when the locking bush is moved by the manual actuator (9), the locking bush moves away from the cavity or hole (17) of the bucket coupler (15) and causes the side pin (3) to move into the retracted position.
  • the supporting bush (2) and the locking bush (4) each comprise a tilted surface, preferably wedge-shaped.
  • one end of the supporting bush (2) has said wedge-shaped tilted surface to cooperate with the tilted surface of the locking bush (4), and one end of the locking bush (4) has said wedge-shaped tilted surface to cooperate with the tilted surface of the supporting bush (2).
  • the locking device comprises a hollow guide cylinder (7) comprising mounted therein:
  • the guide cylinder (7) comprises the socket for receiving the manual actuator (9) to rotate the guide cylinder (7) and move said side pin (3) into the retracted position.
  • the manual actuator is a lever.
  • the side pin (3) moves into the hole of the supporting bush (2) and into the cavity or hole of the bucket coupler (17).
  • the supporting bush (2) is mounted around the cavity or hole of the quick release coupling.
  • the locking device comprises a second side pin (3) arranged to move between a retracted unlocking position and a protruding locking position wherein the pin enters a cavity or hole of the bucket coupler (15) to prevent relative movement between the jaw and the bucket coupler.
  • the first and second side pins (3) move in opposite directions between the retracted unlocking position and the protruding locking position.
  • the locking device comprises a second locking spring (5) arranged to bias the second side pin into the protruding position; and the socket is arranged to receive said manual actuator (9) for moving the second side pin (3) into the retracted position.
  • the quick release coupling (18) comprises a second supporting bush (2), a second locking bush (4) and a second synchronizing pin (6).
  • the supporting bush comprises at least one bore to receive one or more fixing screws or bolts (1) for fixing the supporting bush in the jaw.
  • the fixing screws or bolts (1) fix the supporting bush in the jaw.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)

Claims (12)

  1. Schnellkupplung (18) für eine Baggerschaufelkupplung (15), umfassend eine Klaue (8) zum Erfassen und Halten eines Schaufelstifts (14) und eine Verriegelungsvorrichtung zum Verriegeln der genannten Klaue in einer Halteposition des genannten Schaufelstifts (14), wobei die Verriegelungsvorrichtung umfasst:
    einen seitlichen Stift (3), der so angeordnet ist, dass er sich zwischen einer eingezogenen Entriegelungsposition und einer vorstehenden Verriegelungsposition bewegt, wobei der Stift in einen Hohlraum oder eine Öffnung (17) der Schaufelkupplung einfährt, um eine relative Bewegung zwischen der Klaue und der Schaufelkupplung zu verhindern;
    eine Verriegelungsfeder (5), die so angeordnet ist, dass sie den seitlichen Stift (3) in die vorstehende Position schiebt; und
    eine Buchse zur Aufnahme eines manuellen Aktuators (9), um den seitlichen Stift (3) in die eingezogene Position zu bewegen.
  2. Schnellkupplung (18) nach dem vorangehenden Anspruch, wobei die Verriegelungsvorrichtung umfasst:
    eine Verriegelungsbuchse (4), die an dem seitlichen Stift (3) befestigt ist;
    eine an der Klaue befestigte Stützbuchse (2);
    wobei die Verriegelungsbuchse (4) eine geneigte Oberfläche und die Stützbuchse (2) eine geneigte Oberfläche aufweisen, die so angeordnet sind, dass, wenn die Verriegelungsbuchse (4) relativ zu der Stützbuchse (2) bewegt wird, die geneigten Oberflächen so miteinander zusammenwirken, dass, wenn die Verriegelungsbuchse (4) durch den manuellen Aktuator (9) bewegt wird, sich die Verriegelungsbuchse (4) von dem Hohlraum oder der Öffnung (17) der Schaufelkupplung (15) wegbewegt und bewirkt, dass sich der seitliche Stift in die eingezogene Position bewegt.
  3. Schnellkupplung (18) nach dem vorangehenden Anspruch, wobei
    ein Ende der Stützbuchse (2) die genannte keilförmig abgeschrägte Oberfläche aufweist, um mit der abgeschrägten Oberfläche der Verriegelungsbuchse (4) zusammenzuwirken, und
    ein Ende der Verriegelungsbuchse (4) die genannte keilförmige geneigte Oberfläche aufweist, um mit der geneigten Oberfläche der Stützbuchse (2) zusammenzuwirken; wobei die Verriegelungsvorrichtung einen hohlen Führungszylinder (7) umfasst, indem montiert sind:
    der genannten seitliche Stift (3),
    die genannte Verriegelungsfeder (5),
    einem Synchronisierungsstift (6), der in einer Längsnut des genannten Führungszylinders (7) verschiebbar gelagert ist, und
    die genannte Verriegelungsbuchse (4) gemeinsam mit dem seitlichen Stift (3) und dem genannten Synchronisierungsstift (6) montiert ist,
    so angeordnet ist, dass, wenn der Führungszylinder (7) durch den manuellen Aktuator (9) gedreht wird, der Synchronisierungsstift (6) durch die genannte Nut bewegt wird, um sich zusammen mit dem Führungszylinder (7) zu drehen, die Verriegelungsbuchse (4) sich zusammen mit dem Synchronisierungsstift (6) dreht, die genannten keilförmigen Oberflächen miteinander zusammenwirken, so dass sich die Verriegelungsbuchse von dem Hohlraum oder der Öffnung (17) der Schaufelkupplung (15) wegbewegt und bewirkt, dass sich der Synchronisierungsstift (6) entlang der Nut und der seitliche Stift (3) in die eingezogene Position bewegen.
  4. Schnellkupplung (18) nach dem vorangehenden Anspruch, wobei der Führungszylinder (7) die Buchse zur Aufnahme des manuellen Aktuators (9) umfasst, um den Führungszylinder (7) zu drehen und den seitlichen Stift (3) in die eingezogene Position zu bewegen.
  5. Schnellkupplung (18) nach Anspruch 2, 3 oder 4, wobei die Stützbuchse (2) um den Hohlraum oder die Öffnung der Schnellkupplung herum montiert ist.
  6. Schnellkupplung (18) nach einem der vorangehenden Ansprüche, mit einem Hebel als manuellem Aktuator (9).
  7. Schnellkupplung (18) nach einem der vorangehenden Ansprüche, wobei die Verriegelungsvorrichtung umfasst:
    einen zweiten seitlichen Stift (3), der so angeordnet ist, dass er sich zwischen einer eingezogenen Entriegelungsposition und einer vorstehenden Verriegelungsposition bewegt, wobei der Stift in einen Hohlraum oder eine Öffnung (17) der Schaufelkupplung einfährt, um eine relative Bewegung zwischen der Klaue (8) und der Schaufelkupplung (15) zu verhindern;
    wobei sich der erste und der zweite seitliche Stift in entgegengesetzte Richtungen zwischen der eingezogenen Entriegelungsposition und der vorstehenden Verriegelungsposition bewegen.
  8. Schnellkupplung (18) nach dem vorangehenden Anspruch, wobei die Verriegelungsvorrichtung umfasst:
    eine zweite Verriegelungsfeder (5), die so angeordnet ist, dass sie den zweiten seitlichen Stift (3) in die vorstehende Position schiebt;
    und wobei die genannte Buchse so angeordnet ist, dass sie den genannten manuellen Aktuator (9) aufnimmt, um den zweiten seitlichen Stift (3) in die eingezogene Position zu bewegen.
  9. Schnellkupplung (18) nach dem vorangehenden Anspruch und nach Anspruch 3, 4, 5 oder 6, mit einer zweiten Stützbuchse (2), einer zweiten Verriegelungsbuchse (4) und einem zweiten Synchronisierungsstift (6).
  10. Schnellkupplung (18) nach einem der Ansprüche 2 bis 9, wobei die Stützbuchse (2) mindestens eine Bohrung zur Aufnahme einer oder mehrerer Befestigungsschrauben oder -bolzen zur Befestigung der Stützbuchse in der Klaue aufweist.
  11. Schnellkupplung (18) nach dem vorangehenden Anspruch, mit den Befestigungsschrauben oder -bolzen, die die Stützbuchse (2) in der Klaue (8) fixieren.
  12. Schnellkupplung nach einem der vorangehenden Ansprüche, wobei der Hohlraum oder die Öffnung (17) der Schaufelkupplung eine Öffnung (17) ist.
EP22169578.6A 2021-04-22 2022-04-22 Schnellkupplung mit verriegelungsvorrichtung für eine baggerschaufelkupplung Active EP4089236B1 (de)

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Application Number Priority Date Filing Date Title
PT11719221 2021-04-22

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EP4089236A1 EP4089236A1 (de) 2022-11-16
EP4089236C0 EP4089236C0 (de) 2024-01-03
EP4089236B1 true EP4089236B1 (de) 2024-01-03

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1072843A (ja) * 1996-07-05 1998-03-17 Komatsu Ltd 作業機アタッチメントの簡易着脱装置
US8328459B2 (en) * 2006-09-13 2012-12-11 Ian Hill Coupler for excavators
GB2527353B (en) * 2014-06-19 2018-04-04 Bamford Excavators Ltd A quick hitch coupler with a manually operated locking mechanism to maintain a hook in a locked position

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EP4089236A1 (de) 2022-11-16

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