EP0448788A1 - Quick coupling device for an excavator - Google Patents

Quick coupling device for an excavator Download PDF

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Publication number
EP0448788A1
EP0448788A1 EP90122462A EP90122462A EP0448788A1 EP 0448788 A1 EP0448788 A1 EP 0448788A1 EP 90122462 A EP90122462 A EP 90122462A EP 90122462 A EP90122462 A EP 90122462A EP 0448788 A1 EP0448788 A1 EP 0448788A1
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EP
European Patent Office
Prior art keywords
pistons
pressure
adapter
housing
locking
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.)
Granted
Application number
EP90122462A
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German (de)
French (fr)
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EP0448788B1 (en
Inventor
Reinhard Stenger
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication of EP0448788A1 publication Critical patent/EP0448788A1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • 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
    • E02F3/3631—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
    • E02F3/3663—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-change device according to the preamble of claim 1.
  • a quick coupling for connecting an implement to a shovel loader which comprises a pair of bolts which can be brought into or out of engagement with holes in the implement.
  • the bolts are actuated via linkage and bellcrank, which are connected to a compressed air cylinder.
  • Such an arrangement requires a relatively large amount of space and the forces to be used to adjust the bolts are relatively high.
  • the object of the invention is to provide a quick-change device which can be accommodated as a structural unit to save space on the articulated arm, has a stable structure and ensures a reliable connection between the implement and the articulated arm.
  • the main advantages achieved with the invention are that the locking bolts are in an interlocking position by an interposed single compression spring and the locking bolts or the pistons of the locking bolts are pressurized accordingly only for adjustment to a rest position (unlocking position). This ensures that the system is solely under the tension of the compression spring in the locking position and thus this position is not endangered if the pressure circuit fails.
  • the locking elements consisting of coaxially arranged pistons with locking bolts in a cylindrical housing, can be accommodated in a space-saving manner in an adapter and can be dimensioned according to the requirements with regard to the absorption of forces and moments.
  • the hydraulic control circuit is designed so that the pistons move back against the tension of the compression spring can take place.
  • the pistons could also be pressurized in the effective direction of the compression spring.
  • a unit consisting of a pair of pistons with two locking pins or two pairs of pistons with four locking pins can be used.
  • the pistons are adjusted via an actuatable multi-way valve of the control unit, which can be adjusted manually or electrically using a switch.
  • the implement to be connected to the articulated arm is hung on the adapter, for which purpose this comprises a hook which positively engages around a cam of the implement.
  • a quick-change device 1 for an implement, such as for a backhoe 2 is accommodated in an adapter 3, which is connected to a coupling rod 4 and an articulated arm 5.
  • the locking elements 6 are fastened in the adapter 3, these being arranged between the legs 7 and 8 of the bucket 2 for holding.
  • the locking element 6 comprises in a cylindrical housing 9 coaxially arranged pistons 10 and 11 with locking bolts 12 and 13 formed at the ends. Between the two pistons 10 and 11 a compression spring 14 is arranged which seeks to move the pistons apart in the arrow directions 16.
  • Such a locking element 6 is shown in more detail in FIG. 4, with the locking bolt 12 in a retracted rest position R and the further locking bolt 13 in an extended working position A for the sake of simplicity in a drawing.
  • the locking bolts 12 and 13 together always have the same position A or R.
  • the pistons 10 and 11 are connected to a hydraulic pressure circuit of a control unit 15 in such a way that the pistons can be displaced from the working position A into the rest position R against the direction of the arrow 16.
  • the pistons 10 and 11 have a pressure chamber 17 between the locking bolts 12 and 13 and the housing 9, into each of which a pressure line 18, 18a opens.
  • This pressure chamber 17 is delimited on the one hand by a guide sleeve 19 and on the other hand by a pressure flange 20 of the respective piston.
  • the compression spring 14 is supported at the end in blind bores 21 and 22 of the pistons 10 and 11. It penetrates a central transverse wall 23 on which the pressure flanges 20, 20a of the pistons 10 and 11 are supported in the rest position R.
  • FIG. 8 a first possible hydraulic circuit diagram for the control of the pistons 10 and 11 in the rest position R is shown schematically.
  • This control unit 15 essentially comprises a line 30 guided by a pump 28 via a multi-way valve 29, from which lines 18 and 18a branch to the pressure chambers 17 of the pistons 10 and 11.
  • FIG. 15a A second possible hydraulic circuit diagram for the control of the pistons 10 and 11 in the rest position R and for support in the working position A is shown schematically in FIG.
  • the control unit 15a comprises two outgoing pressure lines 30 and 30a from the multi-way valve 29a.
  • the first line 30 has lines 18 and 18a branching off to the pressure spaces 17.
  • the second line 30a has a branching line 31 which leads into a space 33 between the pistons 10 and 11 and supports a movement of the pistons into a working position A, i.e. the pistons are moved in the effective direction of the spring 14.
  • the recess in the connecting rib in the adapter 3 (Fig. 3) between the two bores 25 is designed so that it enables a pre-fixing during the "coupling process" as a counterpart to the stiffening profile on the bucket 2.

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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)
  • Operation Control Of Excavators (AREA)
  • Earth Drilling (AREA)
  • Shovels (AREA)
  • Lubricants (AREA)
  • Manipulator (AREA)

Abstract

The quick coupling device for an excavator for exchanging working implements is detachably fastened to an adaptor (3) of an articulated arm via locking elements (6) and is held on the articulated arm in such a way as to be pivotable about a horizontal axis. The locking elements consist of pistons which are arranged coaxially in a housing (9) and have end locking pins (12, 13) which can be shifted into an extended working position via an interposed compression spring (14) and into a retracted inoperative position inside the adaptor via the application of pressure controlled by a control unit. This design of the device ensures that the locking pins in the working position are under the stress of the compression spring. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Schnellwechselvorrichtung nach dem Oberbegriff des Anspruches 1.The invention relates to a quick-change device according to the preamble of claim 1.

Aus der DE-A 17 84 323 ist eine Schnellkupplung zum Verbinden eines Arbeitsgerätes mit einem Schaufellader bekannt, die ein Bolzenpaar umfaßt, das in bzw. außer Eingriff mit Bohrungen des Arbeitsgerätes gebracht werden kann. Die Bolzen werden über Gestänge und Umlenkhebel betätigt, welche mit einem Druckluft-Zylinder verbunden sind. Eine solche Anordnung benötigt relativ viel Raum und die aufzubringenden Kräfte zum Verstellen der Bolzen sind verhältnismäßig hoch.From DE-A 17 84 323 a quick coupling for connecting an implement to a shovel loader is known which comprises a pair of bolts which can be brought into or out of engagement with holes in the implement. The bolts are actuated via linkage and bellcrank, which are connected to a compressed air cylinder. Such an arrangement requires a relatively large amount of space and the forces to be used to adjust the bolts are relatively high.

Aufgabe der Erfindung ist es, eine Schnellwechselvorrichtung zu schaffen, die als eine Baueinheit platzsparend am Knickarm unterzubringen ist, einen stabilen Aufbau aufweist und eine zuverlässige Verbindung zwischen Arbeitsgerät und Knickarm gewährleistet.The object of the invention is to provide a quick-change device which can be accommodated as a structural unit to save space on the articulated arm, has a stable structure and ensures a reliable connection between the implement and the articulated arm.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Merkmale beinhalten die Unteransprüche.This object is achieved by the characterizing features of claim 1. The dependent claims contain further advantageous features.

Die mit der Erfindung hauptsächlich erzielten Vorteile bestehen darin, daß die Sperrbolzen durch eine zwischengeschaltete einzige Druckfeder in einer Verriegelungsposition stehen und nur zur Verstellung in eine Ruhepositon (Entriegelungsposition) die Sperrbolzen bzw. die Kolben der Sperrbolzen entsprechend mit Druck beaufschlagt werden. Hierdurch wird gewährleistet, daß das System in der Verriegelungsposition alleinig unter der Spannung der Druckfeder steht und somit bei Ausfall des Druckkreislaufes trotzdem diese Position nicht gefährdet ist.The main advantages achieved with the invention are that the locking bolts are in an interlocking position by an interposed single compression spring and the locking bolts or the pistons of the locking bolts are pressurized accordingly only for adjustment to a rest position (unlocking position). This ensures that the system is solely under the tension of the compression spring in the locking position and thus this position is not endangered if the pressure circuit fails.

Die Verriegelungselemente, bestehend aus koaxial angeordneten Kolben mit Sperrbolzen in einem zylindrischen Gehäuse, sind platzsparend in einem Adapter unterzubringen und entsprechend den Anforderungen hinsichtlich der Aufnahme von Kräften und Momenten dimensionierbar. Insbesondere wird der hydraulische Steuerkreis so ausgelegt, daß ein Zurückfahren der Kolben gegen die Spannung der Druckfeder erfolgen kann. Zur Unterstützung der Federspannung könnte nach einer weiteren Ausführung eine Druckbeaufschlagung der Kolben auch in Wirkrichtung der Druckfeder erfolgen.The locking elements, consisting of coaxially arranged pistons with locking bolts in a cylindrical housing, can be accommodated in a space-saving manner in an adapter and can be dimensioned according to the requirements with regard to the absorption of forces and moments. In particular, the hydraulic control circuit is designed so that the pistons move back against the tension of the compression spring can take place. To support the spring tension, the pistons could also be pressurized in the effective direction of the compression spring.

Je nach den Erfordernissen kann eine Baueinheit bestehend aus einem Kolbenpaar mit zwei Sperrbolzen oder zwei Kolbenpaare mit vier Sperrbolzen verwendet werden.Depending on the requirements, a unit consisting of a pair of pistons with two locking pins or two pairs of pistons with four locking pins can be used.

Die koaxiale Anordnung der beiden Kolben mit axialer Lage der Druckfeder zwischen den Kolben ergibt eine kleinbauende kompakte Baueinheit, die in einfacher Weise im Adapter unterzubringen und montagefreundlich ein- und auszubauen ist.The coaxial arrangement of the two pistons with the axial position of the compression spring between the pistons results in a compact, compact unit that can be easily accommodated in the adapter and is easy to install and remove.

Die Verstellung der Kolben erfolgt über ein betätigbares Mehr-Wegeventil der Steuereinheit, das manuell oder elektrisch über einen Schalter zu verstellen ist.The pistons are adjusted via an actuatable multi-way valve of the control unit, which can be adjusted manually or electrically using a switch.

Bei einer Ausführung der Schnellwechselvorrichtung mit nur einem Verriegelungselement, wird das mit dem Knickarm zu verbindende Arbeitsgerät am Adapter eingehängt, wozu dieser einen Haken umfaßt, der einen Nocken des Arbeitsgerätes formschlüssig umgreift.In an embodiment of the quick-change device with only one locking element, the implement to be connected to the articulated arm is hung on the adapter, for which purpose this comprises a hook which positively engages around a cam of the implement.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben.Embodiments of the invention are shown in the drawing and are described in more detail below.

Es zeigen

Fig.1
eine Seitenansicht eines an einem Knickarm und einer Koppelstange über Verriegelungselemente gehaltenen Tieflöffels,
Fig.2
eine Ansicht in Pfeilrichtung X der Fig. 1 gesehen,
Fig.3
ein Adapter in einer Seitenansicht,
Fig.4
einen Schnitt nach der Linie IV-IV der Fig.1 durch ein Verriegelungselement,
Fig.5
eine weitere Ausführung einer Schnellwechseleinrichtung mit einem Verriegelungselement,
Fig.6
eine Seitenansicht eines Adapters bei einer Einrichtung gemäß Fig.5,
Fig.7
einen Schnitt nach der Linie VII-VII der Fig.5 durch den Adapter mit Verriegelungselement,
Fig.8
einen hydraulischen Wirkschaltplan für zwei Verriegelungseinheiten und
Fig.9
einen weiteren hydraulischen Wirkschaltplan mit hydraulischer Druckunterstützung der Druckfeder.
Show it
Fig. 1
1 shows a side view of a bucket held on a knuckle boom and a coupling rod via locking elements,
Fig. 2
seen a view in the direction of arrow X of FIG. 1,
Fig. 3
an adapter in a side view,
Fig. 4
2 shows a section along the line IV-IV of FIG. 1 through a locking element,
Fig. 5
another embodiment of a quick-change device with a locking element,
Fig. 6
3 shows a side view of an adapter in a device according to FIG. 5,
Fig. 7
5 shows a section along line VII-VII of FIG. 5 through the adapter with locking element,
Fig. 8
a hydraulic circuit diagram for two locking units and
Fig. 9
another hydraulic circuit diagram with hydraulic pressure support of the compression spring.

Eine Schnellwechseleinrichtung 1 für ein Arbeitsgerät, wie z.B. für einen Tieflöffel 2 ist in einem Adapter 3 untergebracht, der mit einer Koppelstange 4 und einem Knickarm 5 verbunden ist. Im Adapter 3 sind die Verriegelungselemente 6 befestigt, wobei diese zwischen Schenkeln 7 und 8 des Tieflöffels 2 zum Halten angeordnet sind.A quick-change device 1 for an implement, such as for a backhoe 2 is accommodated in an adapter 3, which is connected to a coupling rod 4 and an articulated arm 5. The locking elements 6 are fastened in the adapter 3, these being arranged between the legs 7 and 8 of the bucket 2 for holding.

Das Verriegelungselement 6 umfaßt in einem zylindrischen Gehäuse 9 koaxial angeordnete Kolben 10 und 11 mit endseitig ausgebildeten Sperrbolzen 12 und 13. Zwischen den beiden Kolben 10 und 11 ist eine Druckfeder 14 angeordnet, die die Kolben in die Pfeilrichtungen 16 auseinander zu verschieben sucht.The locking element 6 comprises in a cylindrical housing 9 coaxially arranged pistons 10 and 11 with locking bolts 12 and 13 formed at the ends. Between the two pistons 10 and 11 a compression spring 14 is arranged which seeks to move the pistons apart in the arrow directions 16.

In Fig.4 ist ein solches Verriegelungselement 6 näher dargestellt, wobei der Sperrbolzen 12 in einer eingefahrenen Ruheposition R und der weitere Sperrbolzen 13 in einer ausgefahrenen Arbeitsposition A der Einfachheit halber in einer Zeichnung dargestellt ist. Die Sperrbolzen 12 und 13 weisen zusammen immer eine gleiche Position A oder R auf.Such a locking element 6 is shown in more detail in FIG. 4, with the locking bolt 12 in a retracted rest position R and the further locking bolt 13 in an extended working position A for the sake of simplicity in a drawing. The locking bolts 12 and 13 together always have the same position A or R.

Die Kolben 10 und 11 sind mit einem hydraulischen Druckkreis einer Steuereinheit 15 derart verbunden, daß die Kolben von der Arbeitsposition A in die Ruheposition R entgegen der Pfeilrichtung 16 verschiebbar sind. Hierzu weisen die Kolben 10 und 11 zwischen den Sperrbolzen 12 und 13 und dem Gehäuse 9 einen Druckraum 17 auf, in den jeweils eine Druckleitung 18, 18a einmündet. Dieser Druckraum 17 ist einerseits durch eine Führungshülse 19 und andererseits durch einen Druckflansch 20 des jeweiligen Kolbens begrenzt.The pistons 10 and 11 are connected to a hydraulic pressure circuit of a control unit 15 in such a way that the pistons can be displaced from the working position A into the rest position R against the direction of the arrow 16. For this purpose, the pistons 10 and 11 have a pressure chamber 17 between the locking bolts 12 and 13 and the housing 9, into each of which a pressure line 18, 18a opens. This pressure chamber 17 is delimited on the one hand by a guide sleeve 19 and on the other hand by a pressure flange 20 of the respective piston.

Die Druckfeder 14 stützt sich endseitig in Sackbohrungen 21 und 22 der Kolben 10 und 11 ab. Sie durchdringt eine mittige Querwand 23, an welche sich die Druckflansche 20, 20a der Kolben 10 und 11 in der Ruheposition R abstützen.The compression spring 14 is supported at the end in blind bores 21 and 22 of the pistons 10 and 11. It penetrates a central transverse wall 23 on which the pressure flanges 20, 20a of the pistons 10 and 11 are supported in the rest position R.

Wie in der Ausführung gemäß Fig. 1 näher dargestellt ist, sind im Adapter 3 zwei Gehäuse 9 mit Verriegelungselementen 6 angeordnet. Die Sperrbolzen 12, 13 sind in der Hülse 19 geführt und durchdringen in der Arbeitsposition A die Bohrungen 24 und 25 in den Schenkeln 7 und 8 des Tieflöffels 2.1, two housings 9 with locking elements 6 are arranged in the adapter 3. The locking bolts 12, 13 are guided in the sleeve 19 and penetrate the holes 24 and 25 in the legs 7 and 8 of the bucket 2 in the working position A.

Nach einer weiteren Ausführung gemäß der Figuren 5 bis 7 ist im Adapter 3 nur ein Verriegelungselement 6 gehalten und der Adapter 3 weist einen Haken 26 auf, der einen Nocken 27 des Tieflöffels 2 untergreift.According to a further embodiment according to FIGS. 5 to 7, only one locking element 6 is held in the adapter 3 and the adapter 3 has a hook 26 which engages under a cam 27 of the bucket 2.

In Fig. 8 ist ein erster möglicher hydraulischer Wirkschaltplan für die Steuerung der Kolben 10 und 11 in die Ruheposition R schematisch dargestellt. Diese Steuereinheit 15 umfaßt im wesentlichen ein von einer Pumpe 28 über ein Mehr-Wegeventil 29 geführte Leitung 30, von der Leitungen 18 und 18a zu den Druckräumen 17 der Kolben 10 und 11 abzweigen.In Fig. 8, a first possible hydraulic circuit diagram for the control of the pistons 10 and 11 in the rest position R is shown schematically. This control unit 15 essentially comprises a line 30 guided by a pump 28 via a multi-way valve 29, from which lines 18 and 18a branch to the pressure chambers 17 of the pistons 10 and 11.

In Fig.9 ist ein zweiter möglicher hydraulischer Wirkschaltplan für die Steuerung der Kolben 10 und 11 in die Ruheposition R und zur Unterstützung in der Arbeitsposition A schematisch dargestellt. Die Steuereinheit 15a umfaßt vom Mehr-Wegeventil 29 a zwei abgehende Druckleitungen 30 und 30a. Die erste Leitung 30 weist zu den Druckräumen 17 abzweigende Leitungen 18 und 18a auf. Die zweite Leitung 30a weist eine abzweigende Leitung 31 auf, die in einen Raum 33 zwischen den Kolben 10 und 11 führt und eine Bewegung der Kolben in eine Arbeitsposition A unterstützt, d.h. die Kolben werden in Wirkrichtung der Feder 14 verschoben.A second possible hydraulic circuit diagram for the control of the pistons 10 and 11 in the rest position R and for support in the working position A is shown schematically in FIG. The control unit 15a comprises two outgoing pressure lines 30 and 30a from the multi-way valve 29a. The first line 30 has lines 18 and 18a branching off to the pressure spaces 17. The second line 30a has a branching line 31 which leads into a space 33 between the pistons 10 and 11 and supports a movement of the pistons into a working position A, i.e. the pistons are moved in the effective direction of the spring 14.

Die Aussparung in der Verbindungsrippe im Adapter 3 (Fig .3) zwischen den beiden Bohrungen 25 ist so ausgebildet, daß sie als Gegenstück zum Versteifungsprofil am Tieflöffel 2, eine Vorfixierung beim "Kupplungsvorgang" ermöglicht.The recess in the connecting rib in the adapter 3 (Fig. 3) between the two bores 25 is designed so that it enables a pre-fixing during the "coupling process" as a counterpart to the stiffening profile on the bucket 2.

Claims (9)

Schnellwechselvorrichtung für einen Bagger zum Auswechseln von Arbeitsgeräten, die an einem Adapter eines Knickarmes über Verriegelungselemente lösbar befestigt und schwenkbar um eine horzizontale Achse am Knickarm gehalten sind, dadurch gekennzeichnet, daß die Verriegelungselemente (6) aus in einem Gehäuse (9) koaxial angeordneten Kolben (10, 11) mit endseitigen Sperrbolzen (12, 13) bestehen, die über eine zwischengeschaltete Druckfeder (14) in eine ausgefahrene Arbeitsposition (A) und über eine von einer Steuereinheit (15; 15a) geregelte Druckbeaufschlagung in eine eingefahrene Ruheposition (R) innerhalb des Adapters (3) verstellbar sind.Quick-change device for an excavator for replacing work tools, which are releasably attached to an adapter of an articulated arm via locking elements and are pivotably held on the articulated arm about a horizontal axis, characterized in that the locking elements (6) consist of pistons (6) arranged coaxially in a housing (9). 10, 11) with locking bolts (12, 13) at the ends, which, via an intermediate pressure spring (14), extend into an extended working position (A) and via a pressurization controlled by a control unit (15; 15a) into a retracted rest position (R) of the adapter (3) are adjustable. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jeweils nebeneinander angeordnete Kolbenpaare, bestehen aus den Kolben (10 und 11), in Gehäusen (9) im Adapter (3) angeordnet und in diesem über Schrauben befestigt sind, wobei der Adapter (3) von Schenkeln (7, 8) eines Arbeitsgerätes (2) umgriffen ist, in denen korrespondierend zu den Sperrbolzen (12 und 13) Bohrungen (24 und 25) angeordnet sind.Device according to Claim 1, characterized in that pairs of pistons arranged next to one another consist of the pistons (10 and 11), arranged in housings (9) in the adapter (3) and fastened therein by means of screws, the adapter (3) from Legs (7, 8) of an implement (2) are encompassed, in which bores (24 and 25) are arranged corresponding to the locking bolts (12 and 13). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Adapter (3) mit Nocken (27) des Arbeitsgerätes (2) in Eingriff stehende Haken (26) sowie ein Verriegelungselement (6) umfaßt, das benachbart eines Lagerorts einer Koppelstange (4) angeordnet ist und zwei koaxial in einem Gehäuse (9) angeordnete Kolben (10, 11) mit Sperrbolzen (12, 13) aufweist, die in Bohrungen (24, 25) der Schenkel (7, 8) des Arbeitsgerätes (2) eingreifen.Apparatus according to claim 1, characterized in that the adapter (3) comprises hooks (26) which engage cams (27) of the implement (2) and a locking element (6) which is arranged adjacent to a storage location of a coupling rod (4) and has two pistons (10, 11) arranged coaxially in a housing (9) with locking bolts (12, 13) which engage in bores (24, 25) of the legs (7, 8) of the implement (2). Vorrichtung nach den Ansprüchen 1, 2 oder 3, dadurch gekennzeichnet, daß zwischen den beiden Kolben (10 und 11) eine einzige axial wirkende Druckfeder (14) angeordnet ist, die sich in gegenüberliegenden Sackbohrungen (21, 22) der Kolben (10, 11) abstützt.Device according to claims 1, 2 or 3, characterized in that a single axially acting compression spring (14) is arranged between the two pistons (10 and 11), which is located in opposite blind bores (21, 22) of the pistons (10, 11 ) supports. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Kolben (10, 11) in der Ruheposition (R) an einer mittigen Querwand (23) des Gehäuses (9) abgestützt sind, die von der einzigen Druckfeder (14) durchdrungen ist.Device according to one or more of the preceding claims, characterized in that the pistons (10, 11) in the rest position (R) are supported on a central transverse wall (23) of the housing (9) which is penetrated by the single compression spring (14) is. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Sperrbolzen (12, 13) der Kolben (10, 11) einen im Durchmesser größeren anschließenden Druckflansch (20, 20a) aufweisen und zwischen diesem und einer das Gehäuse (9) abschließenden Führungshülse (19) jeweils ein kreisringförmiger Druckraum (17) gebildet wird, in den eine Druckleitung (18, 18a) der Steuereinheit (15; 15a) einmündet.Device according to one or more of the preceding claims, characterized in that the locking bolts (12, 13) of the pistons (10, 11) have an adjoining pressure flange (20, 20a) with a larger diameter and between this and a housing (9) which closes Guide sleeve (19) each has an annular pressure chamber (17) into which a pressure line (18, 18a) of the control unit (15; 15a) opens. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Steuereinheit (15) ein betätigbares Wegeventil (29) in einer Druckleitung (30) umfaßt, welche jeweils abzweigende Leitungen (18, 18a) zu den einzelnen Druckräumen (17) der koaxial angeordneten Kolben (10, 11) in jedem Gehäuse (9) aufweist.Device according to one or more of the preceding claims, characterized in that the control unit (15) comprises an actuatable directional valve (29) in a pressure line (30), each branching lines (18, 18a) to the individual pressure chambers (17) of the coaxial arranged pistons (10, 11) in each housing (9). Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Steuereinheit (15a) von einem betätigbaren Wegeventil (29a) abgehende erste und zweite Druckleitungen (30, 30a) aufweist, wobei die erste Druckleitung (30) abzweigende Leitungen (18 und 18a) zu den Druckräumen (17) der koaxial angeordneten Kolben (10 und 11) umfaßt und die zweite Druckleitung (30a) eine in einen zwischen den beiden Kolben (10 und 11) vorgesehenen Zwischenraum (33) einmündende Leitung (31) aufweist.Device according to one or more of the preceding claims, characterized in that the control unit (15a) has first and second pressure lines (30, 30a) coming from an actuatable directional valve (29a), the first pressure line (30) branching lines (18 and 18a ) to the pressure chambers (17) of the coaxially arranged pistons (10 and 11) and the second pressure line (30a) has a line (31) opening into an intermediate space (33) provided between the two pistons (10 and 11). Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Raum zwischen den beiden Kolben 10 und 11 als Druckraum (33) derart ausgeführt ist, daß die Verschiebung der Kolben (10, 11) in eine Arbeitsposition A unterstützbar ist.Apparatus according to claim 8, characterized in that the space between the two pistons 10 and 11 is designed as a pressure space (33) such that the displacement of the pistons (10, 11) into a working position A can be supported.
EP90122462A 1990-03-30 1990-11-26 Quick coupling device for an excavator Expired - Lifetime EP0448788B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4010224A DE4010224C2 (en) 1990-03-30 1990-03-30 Quick change device
DE4010224 1990-03-30

Publications (2)

Publication Number Publication Date
EP0448788A1 true EP0448788A1 (en) 1991-10-02
EP0448788B1 EP0448788B1 (en) 1994-11-09

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ID=6403398

Family Applications (1)

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EP90122462A Expired - Lifetime EP0448788B1 (en) 1990-03-30 1990-11-26 Quick coupling device for an excavator

Country Status (6)

Country Link
US (1) US5125788A (en)
EP (1) EP0448788B1 (en)
JP (1) JPH04222724A (en)
AT (1) ATE114010T1 (en)
DE (2) DE4010224C2 (en)
NO (1) NO302249B1 (en)

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EP1057941A3 (en) * 1999-05-11 2001-01-03 Daemo Engineering Co., Ltd. A coupling apparatus for detachably attaching an excavating device to excavator
DE19963691C2 (en) * 1999-03-02 2003-02-27 Liebherr Hydraulikbagger Coupling for swinging attachment of a tool to the arm of an excavator or other handling device
EP1672126A3 (en) * 2004-12-14 2007-06-06 PMI Padana Macchine Industriali S.p.A. Hydraulic apparatus and method for the insertion/extraction of pins on pinned booms of earth moving machines
FR2900170A1 (en) * 2006-04-21 2007-10-26 Innovation Equipement Sarl Bucket coupling device for excavator, has central reducer passing hydraulic oil into casing for releasing pistons to lock bucket in arm, and lateral reducers passing oil into casing for re-positioning piston to unlock bucket from arm
FR3019197A1 (en) * 2014-03-26 2015-10-02 Morin SYSTEM FOR ENGAGING A QUICK ATTACHMENT ASSEMBLY
CN115262670A (en) * 2022-07-14 2022-11-01 宁波吉威熔模铸造有限公司 Engineering machine tool scraper bowl coupling assembling convenient to assembly

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EP0615023A1 (en) * 1993-03-10 1994-09-14 Jean-Marie Gérard René Koehl Device for rotably assembling an arm or similar to two branches of a fork formed element
FR2702526A1 (en) * 1993-03-10 1994-09-16 Koehl Jean Marie Gerard Rene Device for assembling an arm or the like in rotation with and between two branches of a fork-shaped part.
DE19963691C2 (en) * 1999-03-02 2003-02-27 Liebherr Hydraulikbagger Coupling for swinging attachment of a tool to the arm of an excavator or other handling device
EP1057941A3 (en) * 1999-05-11 2001-01-03 Daemo Engineering Co., Ltd. A coupling apparatus for detachably attaching an excavating device to excavator
EP1672126A3 (en) * 2004-12-14 2007-06-06 PMI Padana Macchine Industriali S.p.A. Hydraulic apparatus and method for the insertion/extraction of pins on pinned booms of earth moving machines
FR2900170A1 (en) * 2006-04-21 2007-10-26 Innovation Equipement Sarl Bucket coupling device for excavator, has central reducer passing hydraulic oil into casing for releasing pistons to lock bucket in arm, and lateral reducers passing oil into casing for re-positioning piston to unlock bucket from arm
FR3019197A1 (en) * 2014-03-26 2015-10-02 Morin SYSTEM FOR ENGAGING A QUICK ATTACHMENT ASSEMBLY
CN115262670A (en) * 2022-07-14 2022-11-01 宁波吉威熔模铸造有限公司 Engineering machine tool scraper bowl coupling assembling convenient to assembly

Also Published As

Publication number Publication date
DE4010224C2 (en) 1994-05-19
US5125788A (en) 1992-06-30
JPH04222724A (en) 1992-08-12
NO911268L (en) 1991-10-01
EP0448788B1 (en) 1994-11-09
NO911268D0 (en) 1991-03-27
DE59007696D1 (en) 1994-12-15
NO302249B1 (en) 1998-02-09
DE4010224A1 (en) 1991-10-02
ATE114010T1 (en) 1994-11-15

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