EP3502357B1 - Schnellwechsler - Google Patents

Schnellwechsler Download PDF

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Publication number
EP3502357B1
EP3502357B1 EP18209114.0A EP18209114A EP3502357B1 EP 3502357 B1 EP3502357 B1 EP 3502357B1 EP 18209114 A EP18209114 A EP 18209114A EP 3502357 B1 EP3502357 B1 EP 3502357B1
Authority
EP
European Patent Office
Prior art keywords
catch hook
catch
support
quick changer
hook
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
EP18209114.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3502357A1 (de
Inventor
Florian Fälschle
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.)
Oilquick Deutschland KG
Original Assignee
Oilquick Deutschland KG
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 Oilquick Deutschland KG filed Critical Oilquick Deutschland KG
Publication of EP3502357A1 publication Critical patent/EP3502357A1/de
Application granted granted Critical
Publication of EP3502357B1 publication Critical patent/EP3502357B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3618—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with two separating hooks
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3622—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a locking element acting on a pin
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3627—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
    • E02F3/365—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 invention relates to a quick coupler according to the preamble of claim 1.
  • Such quick couplers are used for easy and convenient changing of different attachments on construction machinery.
  • a quick coupler e.g. buckets, grabs, shears, compactors, magnets, hydraulic hammers or other attachments can be coupled or uncoupled in a few seconds and with a high safety standard from a driver's cab e.g. on a boom of an excavator.
  • a generic quick coupler is known.
  • a first gripper with an insertion opening for receiving a first retaining bolt
  • a second gripper which can be moved between a release position and a locking position by means of an actuator and has an insertion opening for receiving a second Retaining bolt provided.
  • a mechanical locking member in the form of two rods extending parallel to the piston rod in the direction of the insertion openings is fastened to the second gripper, which is connected to a piston rod of the actuator.
  • the first ends of the rods are screwed to the movable second gripper, while the second ends of the rods, which are arranged in the area of the insertion opening of the fixed first gripper, have a curvature.
  • the rods can be moved between an extended, receiving position and a retracted, closed position. In the retracted locking position, the bends at the end of the rods align with the retaining pin, so that even if the claws break, the retaining pin will wedge between the insertion hole and the rods, preventing the quick coupler from separating from the work tool due to material failure.
  • the blocking device formed by the two bars must be activated by an operator by appropriately controlling the actuator.
  • An Indian WO 2004/038110 A1 disclosed quick coupler includes a carrier on one side a C-shaped first receptacle for receiving a first bolt-shaped coupling element and on the other side a second receptacle with a means of a Contains cylinder slidable hook-shaped locking element for receiving a second bolt-shaped coupling element.
  • a locking pin is inserted into a hole in a horizontal lower part of the C-shaped first receptacle, which is designed as a bent part.
  • such a safety pin does not represent a catch hook and is also not used to catch an attachment that is in motion, but is only used to securely hold the first bolt-shaped coupling element within the C-shaped first receptacle.
  • the locking pin must also be manually inserted by the operator after proper docking and secured with an additional spring locking cotter pin. Here, too, active intervention by the operator is required to activate the safety device.
  • One from the pamphlet US 2012/0093572 A1 known quick coupler contains on one side of a carrier first claw-shaped receptacles for receiving a first coupling element and on the other side of the carrier second claw-shaped receptacles with a hook-shaped locking element pivotable about a transverse axis.
  • An additional hook-shaped locking element is provided on the first claw-shaped receptacles.
  • the two hook-shaped locking elements are coupled to one another via a linkage in such a way that they are actuated together via a piston drive.
  • an active intervention by the operator with a control of the piston drive is required to activate the locking elements. If the first locking element is inadvertently moved into the open position, the second locking element is also forced into the open position.
  • first claw-shaped receptacles for receiving a first coupling element are provided on one side of a carrier and second claw-shaped receptacles for receiving a second coupling element are provided on the other side of the carrier.
  • a hook-shaped first locking element which can be pivoted about a transverse axis and can be moved between an open and closed position by means of a piston drive is arranged on the first receptacles.
  • a cam-shaped second locking element is provided on the second receptacles. The cam-shaped second locking element is coupled to the first locking element in such a way that these are actuated simultaneously by appropriate activation of the piston drive.
  • Another quick coupler is known.
  • This includes a carrier which has first receptacles on one side for holding a first coupling element provided on an attachment and second receptacles on the other side with a locking element movable between a release position and a locking position for releasably holding a second coupling element.
  • a catch device with a hook arrangement for holding a crossbar interacting with counter hooks on the attachment is provided on the carrier. Since the hook arrangement provided for securing is designed in one piece with the carrier, damage to the hook arrangement caused by improper use always also affects the entire carrier. A repair or an exchange is therefore associated with a considerable effort.
  • the object of the invention is to create a quick coupler of the type mentioned at the outset that contains a safety device that is easy to assemble and, if necessary, easy to replace.
  • the catching device has at least one catching hook that is connected to the carrier via a non-destructively detachable connection and is non-pivotable, which is designed for catching an attachment independently of the operator for additional security.
  • a catch hook damaged by improper use can be easily replaced without replacing the entire carrier.
  • the entire carrier does not have to be dismantled or replaced.
  • the interface or separation point between the support and the catch hook can also ensure that damage to the support is avoided if the catch hook arrangement is subjected to improper loads.
  • the at least one catch hook is designed in such a way that it can catch an attachment coupled to the quick coupler even in the event of an unintentional release movement of a locking device and thereby prevent the attachment from being released from the quick coupler in an undesired manner.
  • the catch hook is completely independent of the operator-controlled locking device of the quick coupler and thus offers increased safety even in the event of improper operation.
  • the catch device can comprise one or more catch hooks that are separate from one another or connected to one another.
  • the catch device can be formed by two catch hooks arranged on the first receptacles of the carrier.
  • the non-destructively releasable connection can be formed by at least one connecting element and associated receptacles in the carrier and the catch hook.
  • the connecting elements can, for example, be designed as connecting bolts and the receptacles as bores.
  • the connecting bolt can be designed as a screw or pin.
  • the non-destructively releasable connection can also be designed as a tongue and groove connection or in another suitable manner.
  • the bores for the at least one connecting bolt can be arranged in a connecting web that protrudes relative to the carrier and in a connecting groove on the catch hook that corresponds to the connecting web.
  • a particularly useful interface between the carrier and the catch hook can be created in that the connecting web on the carrier has a trapezoidal cross section with oppositely sloping outer contact surfaces and the connecting groove on the catch hook contains an associated trapezoidal cross section with opposite inner contact surfaces.
  • a particularly good protection of the wearer in the event of impermissible loads on the catch hook can be achieved in that the distance between a front edge of the catch hook and the hole in the catch hook is smaller than the distance from a front edge of the catch hook Connecting bridge to the hole in the connecting bridge is. As a result, the loads are more likely to be transferred to the catch hook.
  • the connecting web on the carrier can also protrude between two legs of a catch hook that are spaced apart from one another.
  • the catch hook can consist of a softer or more flexible material than the carrier. This can additionally ensure that the catch hook is deformed or damaged even before the carrier in the event of improper loading.
  • the carrier can be made of a tougher or more wear-resistant material than the catch hook.
  • the catch hook is designed to grip around a coupling element that engages with the first receptacles.
  • a quick coupler 1 is shown for easy and convenient changing of different attachments on construction machines, in particular excavators.
  • a quick coupler for example, swivel buckets, grippers, shears, magnets, compactors, hydraulic hammers or other mechanical or hydraulic attachments can be easily and conveniently coupled or uncoupled from a driver's cab to a boom or other attachment of an excavator or other construction vehicle.
  • the quick coupler 1 shown contains a carrier 2 designed as a welded or cast part, the first receptacles 3 open to the front on one side for receiving and holding a first bolt-shaped coupling element and the second receptacles 4 open downwards on the other side to receive a second bolt-shaped Contains coupling element.
  • the first receptacles 3, which are open at the front, are designed in the form of claws or forks.
  • the downwardly open receptacles 4 have a curved lower contact surface 5 for contacting the second bolt-shaped coupling element.
  • the carrier 2 contains in figure 1 recognizable guide bores 6, in which an in figure 5 shown piston-shaped locking element 7 slidably guided and hydraulically between a retracted release position and an in figure 5 shown extended locking position are movably arranged.
  • the downwardly open second receptacles 3 are closed on the underside by the locking element 7 arranged in the guide bores 6 , so that the second bolt-shaped coupling element is gripped by the locking element 7 .
  • the carrier 2 contains two claw-shaped first receptacles 3 for a first coupling element on one side and two receptacles 4 for a second coupling element on the other side.
  • continuous receiving openings 9 for fastening bolts (not shown) for fastening the quick coupler 1 to a boom of an excavator or a connection part of another construction vehicle are provided on two parallel side parts 8 arranged on the upper side of the carrier 2 .
  • the quick coupler 1 which is usually arranged on a boom of an excavator, is first moved in such a way that a first coupling element 5 arranged on an adapter or on the attachment, for example, fits into the claw-shaped receptacles 3 on one side of the quick coupler 1 is retracted. Then, with the locking elements 7 still pulled back, the quick coupler 1 is pivoted about the first bolt-shaped coupling element 5 in such a way that a second coupling element on the adapter or attachment comes to rest against the contact surfaces 5 of the receptacles 4, which are open at the bottom, on the other side of the quick coupler 1.
  • the bolt-shaped locking elements 7 arranged to be displaceable in the guide bores 6 in the carrier 2 of the quick coupler 1 can be extended hydraulically, so that the second bolt-shaped coupling element is gripped under by the two locking elements on the quick coupler 2 and the attachment is thus held on the quick coupler 1.
  • the carrier 2 has an in figure 1 illustrated additional capture device 10 is provided.
  • the catching device 10 is designed to grip around the coupling element which is arranged on an adapter or attachment and engages with the first receptacles 3 .
  • the catching device 10 is designed in such a way that an attachment is caught in a catching position in the event of an unintentional release from the coupling position by engagement of the coupling element on the catch hook arrangement and is thereby held on the quick coupler.
  • the catch device 10 comprises two separate catch hooks 11, which are connected to the carrier 2 via a non-destructively detachable screw or pin connection.
  • the carrier 2 according to figure 2 forwardly projecting connecting webs 12 for engagement in corresponding connecting grooves 13 of the catch hook 11.
  • the connecting web 12 has a trapezoidal cross-section with oppositely sloping outer contact surfaces 14.
  • the connecting groove 13 in the catch hook 11 is designed as a keyway with a trapezoidal cross-section. Out of figure 6 it can be seen that the connecting groove 13 contains two oppositely sloping inner contact surfaces 15 .
  • Receptacles 16 and 17 designed as bores are provided on the catch hooks 11 and in the connecting webs 12 for receiving bolt-shaped connecting elements 18 .
  • the bolt-shaped connecting elements 18 are designed as threaded bolts.
  • the connecting bolts 18 can also be designed as pins.
  • FIGS 7 and 8 are cross-sections of the separation point between the connecting web 12 carrier 2 and a catch hook 11 without the bolt-shaped connecting element 18 when the catch hook 11 is loaded from below and above.
  • the main loads are in area A on the underside of the catch hook 11 and in area B of the connecting web 12. So that area A of the catch hook 11 is more likely to be damaged with this load, the distance X from a front edge 19 of the catch hook 11 to the receptacle 16 designed as a bore in the catch hook is selected to be smaller than the distance Y from a front edge 20 of the connecting web 12 to the receptacle 17 in the connecting web 12 designed as a bore.
  • the catch hook 11 due to an incorrect load from above with a force in the direction of the arrow O of figure 8 applied, the areas B of the connecting web 12 and the area C at the top of the catch hook 11 are more heavily loaded. Since the distance here too W between the front edge 19 of the catch hook 11 and the receptacle 16 designed as a bore in the catch hook 11 is smaller than the distance Y from a front edge 20 of the connecting web 12 to the receptacle 17 designed as a bore in the connecting web 12, a possible Damage to the catch hook 11 rather than the connecting web 12 of the carrier 2.
  • the catch hook 11 is designed in such a way that the area C of the catch hook 11 located above the connecting groove 13 between the front edge 19 and the receptacle 16 designed as a bore has a larger cross section than the area below the connecting groove 13 between the front edge 19 and the as Bore-trained receptacle 16 lying area A has.
  • the catch device 10 comprises two separate catch hooks 11, which are firmly connected to the carrier 2 via a non-destructively detachable pin connection.
  • the carrier 2 has according to figure 9 below the recordings 3 projecting connecting webs 12 for engagement in corresponding connecting grooves 13 of the catch hook 11.
  • the connecting webs 12 contain a transverse bore 21 for receiving an in figure 10 shown transverse pin 22.
  • the catch hook 11 contains two legs 23 spaced apart from one another, between which the connecting groove 13 for receiving the connecting web 12 is formed. In the two legs 23 aligned bores 24 are provided for receiving the transverse pin 22.
  • the transverse pin 22 is fixed to the carrier 2 via two retaining rings 25 .
  • the catch hook 11 is designed in such a way that it can be dismantled via the transverse pin 22 but is fixed and not pivotable about the transverse pin 22 on the carrier 2 . In the previous embodiment, too, the catch hooks 11 are fixed and not pivotable on the carrier 2, but can be easily dismantled if necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Mechanical Operated Clutches (AREA)
  • Valve Device For Special Equipments (AREA)
  • Braking Systems And Boosters (AREA)
  • Shovels (AREA)
EP18209114.0A 2017-12-19 2018-11-29 Schnellwechsler Active EP3502357B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017130439.8A DE102017130439A1 (de) 2017-12-19 2017-12-19 Schnellwechsler

Publications (2)

Publication Number Publication Date
EP3502357A1 EP3502357A1 (de) 2019-06-26
EP3502357B1 true EP3502357B1 (de) 2023-02-15

Family

ID=64559515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18209114.0A Active EP3502357B1 (de) 2017-12-19 2018-11-29 Schnellwechsler

Country Status (7)

Country Link
EP (1) EP3502357B1 (da)
DE (1) DE102017130439A1 (da)
DK (1) DK3502357T3 (da)
ES (1) ES2939846T3 (da)
FI (1) FI3502357T3 (da)
HU (1) HUE061563T2 (da)
PL (1) PL3502357T3 (da)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020100991A1 (de) 2020-01-16 2021-07-22 Lehnhoff Hartstahl Gmbh Schnellwechsler

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH500346A (de) * 1969-04-17 1970-12-15 Pallotti Umberto Vorrichtung zur lösbaren Befestigung der auswechselbaren Zahn- bzw. Messervorderteile an Erdbewegungsgeräten oder landwirtschaftlichen Maschinen
DE2249268A1 (de) * 1972-10-07 1974-04-11 Ley Maschf W Planiereinrichtung zum einhaengen in front- und heckladerschwingen mit hydraulisch schwenkbarer ladeschaufel
AU4791893A (en) * 1992-07-27 1994-02-14 Gilmore Transportation Services, Inc. Coupling for heavy-duty machine
US5974706A (en) 1997-03-10 1999-11-02 Clark Equipment Company Attachment construction for earthworking implement
IE981051A1 (en) * 1997-12-16 1999-06-16 Redrock Engineering Ltd Attachement device for excavating or digging apparatus
JP2002327471A (ja) * 2001-05-02 2002-11-15 Komatsu Ltd バケットツースとピンおよびその締結体
DE60103907T2 (de) * 2001-11-19 2005-06-23 Mantovanibenne S.R.L., Mirandola Schnellkupplungsvorrichtung für Werkzeuge
US6979167B2 (en) * 2002-10-16 2005-12-27 Rockland, Inc. Excavator coupler assembly
AU2003278636A1 (en) * 2002-10-24 2004-05-13 Bas Manufacturing Limited Connector for earth moving implements
AR046804A1 (es) * 2003-04-30 2005-12-28 Esco Corp Conjunto de acoplamiento desenganchable para pala de excavadora
FR2900170A1 (fr) * 2006-04-21 2007-10-26 Innovation Equipement Sarl Dispositif d'accouplement hydraulique d'un godet au bout d'un bras de pelleteuse par verrouillage, deverrouillage lateral
ITMO20080143A1 (it) * 2008-05-15 2009-11-16 Mantovanibenne S R L Organo d'attacco per l'accoppiamento di un attrezzo ad un braccio operatore con blocco di sicurezza.
US7866935B1 (en) * 2008-12-11 2011-01-11 TAG Manufacturing, Inc. Manually operated coupler
CH700307A1 (de) * 2009-01-23 2010-07-30 Josef Martin Gmbh & Co Kg Schnellkupplung mit Sicherungseinrichtung.
KR101093218B1 (ko) * 2009-08-12 2011-12-13 주식회사 에버다임 중장비용 어태치먼트 커플러
US10385548B2 (en) * 2009-12-11 2019-08-20 Cqms Pty Ltd Lock assembly for an excavator wear member

Also Published As

Publication number Publication date
EP3502357A1 (de) 2019-06-26
PL3502357T3 (pl) 2023-05-29
FI3502357T3 (fi) 2023-05-08
ES2939846T3 (es) 2023-04-27
DE102017130439A1 (de) 2019-06-19
HUE061563T2 (hu) 2023-07-28
DK3502357T3 (da) 2023-05-01

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