EP0321902A1 - Tool-connecting device for an excavator - Google Patents

Tool-connecting device for an excavator Download PDF

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Publication number
EP0321902A1
EP0321902A1 EP88121217A EP88121217A EP0321902A1 EP 0321902 A1 EP0321902 A1 EP 0321902A1 EP 88121217 A EP88121217 A EP 88121217A EP 88121217 A EP88121217 A EP 88121217A EP 0321902 A1 EP0321902 A1 EP 0321902A1
Authority
EP
European Patent Office
Prior art keywords
coupling
implement
bracket
holding
arm
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
EP88121217A
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German (de)
French (fr)
Other versions
EP0321902B1 (en
Inventor
Hans-Rudolf Zepf
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.)
DRAGO ENGINEERING AG
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Individual
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Filing date
Publication date
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Priority to AT88121217T priority Critical patent/ATE103027T1/en
Publication of EP0321902A1 publication Critical patent/EP0321902A1/en
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Publication of EP0321902B1 publication Critical patent/EP0321902B1/en
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Expired - Lifetime legal-status Critical Current

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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
    • E02F3/3668—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat where engagement is effected by a mechanical lever or handle
    • 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 invention relates to a coupling device for coupling an implement for the soil and construction technology, which is attached to the end arm of a boom of a construction machine, in particular an excavator, by means of an axis and can be actuated by a linear motor assigned to the end arm for pivoting the implement about the axis , wherein the end arm and the piston rod of the linear motor or a link connected to the piston rod via a swivel lever are connected to the free end and to the implement by a connecting part.
  • the excavator with its many design variants represents a large-scale working machine for this purpose, and its modern design as a hydraulic excavator is particularly powerful and versatile.
  • the different embodiments relate primarily to the size and the support and locomotion means of the excavator, while for the handling of an implement all excavators are largely equipped with an extension arm, at the end of which the implement is supported by an end arm.
  • the boom is divided into boom parts, each of which is adjustable, for example by hydraulic linear motors.
  • the end arm and the implement are also adjustable, for example using hydraulic linear motors.
  • the implement is pivoted on the end arm and its position is adjusted by the linear motor.
  • the quick coupling essentially consists of a hook that is hooked into a shaft.
  • a clamping device is used to hold the hook, e.g. a clamping screw with which the two parts of the quick coupling are clamped and held.
  • the connecting part is formed by a holding arm arranged at both ends with gripping means to form a holding bracket separate from the implement, the gripping means of the holding bracket can be coupled to holding means arranged on the working device in its separating and fastening area. Due to the fact that the connecting means required on the implement for connecting to the end arm and the linear motor are arranged in the connecting part designed for the retaining bracket, no greater overall height is required than when the implement is directly coupled to the end arm and to the linear motor.
  • the excavator shown in Figure 1 has a crawler track 1, on which an upper part 2 is rotatably mounted. On the upper part 2, a driver's cab 3 and a jib 4 are mounted.
  • an end arm 7 is pivotally articulated, on which an excavator bucket 8 is articulated.
  • the end arm 7 is pivoted by a hydraulic linear motor 9 relative to the boom part 6, which in turn is supported on the boom part 6.
  • a further hydraulic linear motor 10 is mounted on the arm 7, the piston rod 11 of which engages on a pivot lever 12 which is pivotably mounted on the end arm 7 and transmits the stroke movement of the linear motor 10 to the excavator bucket 8.
  • the excavator bucket 8 is provided with two joints. With one joint 14, the excavator bucket 8 is connected in an articulated manner to the end arm 7, while it is connected to the joint 15 via the link 13 and the pivoting lever 12 with the hydraulic linear motor 10.
  • the linear motor 10 thus pivots the excavator bucket 8 around the joint 14. This is the normal connection between the excavator bucket 8 and the end arm 7 when the excavator is used practically exclusively with the excavator bucket 8.
  • the excavator is also used for other work, for example with a chisel, a hydraulic hammer and the like. If possible, the bucket quickly replace with another implement, the range of uses of the excavator is significantly increased.
  • FIG. 2 shows the solution according to the invention of a coupling device 18 for quickly changing work tools on the boom of an excavator.
  • the excavator bucket 8 is connected to the end arm 7 and the linear motor 10 by means of a connecting part 16, in which the joints 14, 15 are also arranged.
  • the connecting part 16 with the joints 14, 15 is expanded to form a holding bracket 19 in order to form the quick coupling.
  • the bracket 19 is essentially designed as an angle lever with two holding arms 20, 21.
  • the two holding arms 20, 21 have, as will be explained in more detail at their ends, gripping means which are also attached to the implement, i.e. arranged on the excavator bucket 8 holding means can be coupled to a fixed connection.
  • the excavator bucket 8 has an end surface 23 on which a support surface 24 is attached as a closure against the end arm.
  • the support surface 24 has a curvature 25 on the end arm side, on which a support plate 26 is fastened.
  • the support surface 24 extends over the entire width of the excavator bucket 8 and lies between the side walls 30 thereof.
  • a holding shaft 27 is fastened by means of webs 28.
  • a bearing support 31 is fastened on the upper side of the end surface 23 at a distance from the holding shaft 27 and has a bore 32 parallel to the joints 10, 15, which runs into a slot 33 that widens upwards.
  • the holding shaft 27 and the bearing support 31 form the holding means of the implement.
  • the gripping means of the holding bracket 19 are composed of a bearing half-shell 35, which is formed on the inwardly curved end of the holding arm 20 on the end arm side, and a coupling shaft 37.
  • the clutch shaft 37 is in the linear arm-side support arm rotatably mounted and is provided with a handle bracket 38, by means of which the coupling shaft 37 can be pivoted.
  • the coupling shaft 37 has a cross section reduced by a circular section 39. In the position of the circular section 39 shown in FIG. 2, the coupling shaft 37 cannot be removed from the slot 33.
  • the circular section 39 is arranged such that in a certain position of the handle bar 38, for example in the position shown in broken lines, the coupling shaft 37 can be removed from the slot 33, but not in another position, for example in the extended position of the handle bar 38.
  • the holding bracket 19 is expediently formed from two parallel webs which are connected to one another by transverse webs 34.
  • the bearing support 31 then lies between the two retaining bracket webs.
  • FIG. 3 shows the coupling of an implement in the form of the excavator bucket 8.
  • the holding arm 20 of the holding bracket 19 encompasses the holding shaft 27 with the bearing half shell 35 arranged at its end 36, while the other holding arm 21 on the linear motor side moves in the direction of the arrow against the bearing support 31.
  • the handle bar 38 is in such a position that the coupling shaft 37 with the circular cutout 39 can be inserted into the bore 32 through the slot 33. After insertion into the bore 32, the handle bar 38 is brought into the extended position shown in Fig. 2, whereby it lies between the webs of the bracket 19 and is protected.
  • the clutch shaft is in a position in which it cannot be removed from the bore 32.
  • an elastic pressure element 40 arranged on the inside of the holding bracket 19 moves against that on the arch 25 of the support surface 24 attached support plate 26.
  • the elastic pressure element 40 is supported on a support profile 41 fastened between the webs of the holding bracket 21.
  • the pressure element 40 can be a rubber or steel spring element, which, through its pressure effect on the support plate 26, cancels any play between the holding bracket 19 and the implement 8.
  • FIG. 4-7 shows a variant of the coupling device in which the mounting of the holding arm 20 takes place in the same way as in the embodiment according to FIGS. 2 and 3 via the bearing half-shell 35 with the holding shaft 27, while a full coupling shaft 37 is located in the holding arm 21 on the linear motor side 'Is stored.
  • a bearing half-shell 42 is fastened, which in the coupling position rests on the coupling shaft 37 ', see Figure 5.
  • the handle bar 38 is connected to a coupling shell 43 which is connected by means of a pin 44, e.g. a cross pin, with the coupling shaft 37 'is connected.
  • Two coupling shells 43 are expediently provided, as shown in FIGS. 5 and 7.
  • fasteners 45 e.g. Retaining rings with which the shaft 37 'is guided in the two webs of the bracket 19, is provided.
  • the coupling device 18 described enables the overall height between the end arm 7 and the implement 8 to be approximately the same to be kept large as in the case of an implement which is coupled directly to the joints 14 of the end arm or of the handlebar 13 with its fastening means arranged on the end face 23.
  • various other implements can be replaced quickly and easily with the coupling device described.
  • the retaining bracket 19 consisting of two webs with cross bars 34 can be produced as a welded construction made of sheet steel, the thickness of which can be chosen to be sufficiently strong (15-20 mm) in accordance with the stresses that occur.

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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)
  • Earth Drilling (AREA)
  • Agricultural Machines (AREA)

Abstract

The connecting device is composed of a retaining frame (19) and retaining means, fastened to the tool (8), in the form of a retaining shaft (27) and a bearing support (31). The retaining frame (19) designed as a bell-crank lever has a half bearing shell (35) for enclosing the retaining shaft (27) and a connecting shaft (37) for inserting into the bearing support (31). The bearing frame (19) is mounted by means of two joints (14, 15) on the end arm (7) of a boom of an excavator and on a guide link (13) of a linear motor (10) interacting with the end arm (7). To connect a tool (8), the connecting shaft (37) is moved by means of a handle (38) into a position in which it can be inserted into a bore (32) of the bearing support (31) through a slot (33) made on the bearing support (31) and can be secured by turning the handle (38). By the retaining frame being arranged with the joints (14, 15) directly on the end arm (7) and the guide link (13) respectively, only a small overall height is required for the connecting device. <IMAGE>

Description

Die Erfindung betrifft eine Kupplungsvorrichtung zum Ankuppeln eines Arbeitsgerätes für die Boden- und Bautechnik, welches an dem Endarm eines Auslegers einer Baumaschine, insbesondere eines Bag­gers, mittels einer Achse befestigt und durch einen, dem Endarm zugeordneten Linearmotor zum Schwenken des Arbeitsgerätes um die Achse betätigbar ist, wobei der Endarm und die Kolbenstange des Linearmotors bzw. ein über einen Schwenkhebel mit der Kolbenstange verbundener Lenker an dem freien Ende und mit dem Arbeitsgerät durch ein Verbindungsteil verbunden sind.The invention relates to a coupling device for coupling an implement for the soil and construction technology, which is attached to the end arm of a boom of a construction machine, in particular an excavator, by means of an axis and can be actuated by a linear motor assigned to the end arm for pivoting the implement about the axis , wherein the end arm and the piston rod of the linear motor or a link connected to the piston rod via a swivel lever are connected to the free end and to the implement by a connecting part.

In der Boden- und Bautechnik sind sehr verschiedene Arbeiten auszuführen, welche ausser der Verarbeitung grosser Materialmengen und der Vorbereitung des Baugrundes zahlreiche weitere Arbeiten umfassen. Eine hierzu in grossem Umfang eingesetzte Arbeitsmaschine stellt der Bagger mit seinen vielen Ausführungsvarianten dar, welcher in seiner modernen Ausführung als Hydrobagger besonders leistungsfähig und vielseitig einsetzbar ist. Die unterschiedlichen Ausführungsformen beziehen sich vor allem auf die Grösse und die Abstütz- und Fortbewegungsmittel des Bag­gers, während für die Handhabung eines Arbeitsgerätes alle Bagger weitgehend mit einem Ausleger ausgerüstet sind, an dessen Ende das Arbeitsgerät mittels eines Endarmes gelagert ist. Der Ausleger ist in Auslegerteile unterteilt, von denen jedes verstellbar ist, beispielsweise durch hydraulische Linearmotoren. Auch der Endarm und das Arbeitsgerät sind verstellbar, beispielsweise ebenfalls durch hydraulische Linearmotoren. Das Arbeitsgerät ist hierbei am Endarm schwenkbar angeordnet und wird durch den Linearmotor in seiner Lage verstellt.In soil and construction technology, very different works have to be carried out, which in addition to the processing of large quantities of material and the preparation of the subsoil include numerous other works. The excavator with its many design variants represents a large-scale working machine for this purpose, and its modern design as a hydraulic excavator is particularly powerful and versatile. The different embodiments relate primarily to the size and the support and locomotion means of the excavator, while for the handling of an implement all excavators are largely equipped with an extension arm, at the end of which the implement is supported by an end arm. The boom is divided into boom parts, each of which is adjustable, for example by hydraulic linear motors. The end arm and the implement are also adjustable, for example using hydraulic linear motors. The implement is pivoted on the end arm and its position is adjusted by the linear motor.

Entsprechend den durch den Bagger auszuführenden unterschiedlichen Arbeiten sind auch jeweils unterschiedliche Arbeitsgeräte zu verwenden. In der einfachsten Ausführungsform des Baggers werden hierzu die Verbindungen des Arbeitsgerätes mit dem Endarm und dem Linearmotor gelöst und an dessen Stelle ein anderes Arbeitsgerät befestigt. Da das Lösen des Arbeitsgerätes und das Einsetzen eines neuen Arbeitsgerätes eine recht aufwendige Arbeit darstellt, hat es nicht an Vorschlägen gefehlt, das Auswechseln eines Arbeitsgerätes einfacher und weniger aufwendig durchzuführen. Hierzu ist es bekannt, den Endarm und den Linearmotor, gegebenenfalls unter Verwendung von Zwischenstücken mit einem Verbindungsteil zu kuppeln und an diesem den einen Teil einer Schnellkupplung zu befestigen, während der andere Teil der Kupplung an dem Arbeitsgerät befestigt ist. Die Schnellkupplung besteht im wesentlichen aus einem Haken, der in eine Welle eingehängt wird. Zum Festhalten des Hakens dient ein Spannmittel, z.B. eine Spannschraube, mit dem die beiden Teile der Schnellkupplung festgespannt und gehalten werden.Depending on the different work to be carried out by the excavator, different work tools must also be used. In the simplest embodiment of the excavator, the connections of the implement with the end arm and the linear motor are released and another implement is attached in its place. Since the loosening of the implement and the insertion of a new implement is a very complex work, there has been no lack of proposals to carry out the replacement of an implement more easily and with less effort. For this purpose, it is known to couple the end arm and the linear motor, optionally using intermediate pieces, to a connecting part and to fasten one part of a quick coupling to the latter, while the other part of the coupling is fastened to the working device. The quick coupling essentially consists of a hook that is hooked into a shaft. A clamping device is used to hold the hook, e.g. a clamping screw with which the two parts of the quick coupling are clamped and held.

Mit einer solchen Schnellkupplung kann zwar das Auswechseln eines Arbeitsgerätes schnell und mit geringem Aufwand ausgeführt werden, doch besteht der Nachteil darin, dass durch den Einbau der Schnellkupplung zusätzliche Höhe benötigt wird, was sich besonders bei kleineren Baggertypen nachteilig auswirkt.With such a quick coupling, the replacement of an implement can be carried out quickly and with little effort, but the disadvantage is that the installation of the quick coupling requires additional height, which is particularly disadvantageous for smaller excavator types.

Hier setzt die Erfindung ein, der die Aufgabe zugrunde liegt, eine Kupplungsvorrichtung der eingangs beschriebenen Art so weiter auszugestalten, dass keine zusätzliche Höhe für die Unterbringung der Schnellkupplung benötigt wird, aber das trotzdem einfache und schnelle Wechseln eines Arbeitsgerätes gewährleistet ist.This is where the invention, which is based on the object, uses a coupling device of the type described at the outset To design that no additional height is required to accommodate the quick coupling, but that simple and quick change of a tool is still guaranteed.

Diese Aufgabe wird gemäss der Erfindung dadurch gelöst, dass zum leichten Trennen des Arbeitsgerätes von dem Ausleger und zum schnellen Befestigen desselben an dem Ausleger das Verbindungsteil durch einen an seinen beiden Enden angeordneten Haltearm mit Greifmitteln zu einem vom Arbeitsgerät getrennten Haltebügel ausgebildet ist, wobei die Greifmittel des Haltebügels mit an dem Arbeitsgerät in seinem Trenn- und Befestigungsbereich angeordneten Haltemitteln kuppelbar sind. Dadurch, dass die am Arbeitsgerät zum Verbinden mit dem Endarm und dem Linearmotor erforderlichen Verbindungsmittel in den zum Haltebügel ausgebildeten Verbindungsteil angeordnet sind, wird keine grössere Bauhöhe benötigt als beim direkten Ankuppeln des Arbeitsgerätes am Endarm und am Linearmotor.This object is achieved according to the invention in that, for easy separation of the implement from the boom and for rapid attachment thereof to the boom, the connecting part is formed by a holding arm arranged at both ends with gripping means to form a holding bracket separate from the implement, the gripping means of the holding bracket can be coupled to holding means arranged on the working device in its separating and fastening area. Due to the fact that the connecting means required on the implement for connecting to the end arm and the linear motor are arranged in the connecting part designed for the retaining bracket, no greater overall height is required than when the implement is directly coupled to the end arm and to the linear motor.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und nachfolgend beschrieben. Es zeigen:

  • Fig. 1 Eine schematische Darstellung eines Baggers mit einem Ausleger und einem daran angelenkten Endarm, welch letzterer einen Baggerlöffel trägt.
  • Fig. 2 Einen Ausschnitt in vergrösserter Darstellung der Kupplungsvorrichtung zur Verbindung des Endarmes des Auslegers mit dem Arbeitsgerät in Form eines Baggerlöffels,
  • Fig. 3 eine Darstellung ähnlich derjenigen in Fig. 2, aus welcher der Kupplungsvorgang ersichtlich ist,
  • Fig. 4 eine Variante einer Kupplungsvorrichtung ähnlich derjenigen in Fig. 2,
  • Fig. 5 einen Schnitt längs der Linie V-V in Figur 4,
  • Fig. 6 eine Darstellung der Kupplungsvorrichtung nach Figur 4 in geöffnetem Zustand und
  • Fig. 7 einen Schnitt ähnlich demjenigen in Figur 5.
An embodiment of the invention is shown in the drawing and described below. Show it:
  • Fig. 1 is a schematic representation of an excavator with a boom and an articulated end arm, the latter carrying an excavator bucket.
  • 2 shows a detail in an enlarged view of the coupling device for connecting the end arm of the boom to the implement in the form of an excavator bucket,
  • 3 shows a representation similar to that in FIG. 2, from which the coupling process can be seen,
  • 4 shows a variant of a coupling device similar to that in FIG. 2,
  • 5 shows a section along the line VV in FIG. 4,
  • Fig. 6 is an illustration of the coupling device of Figure 4 in the open state and
  • 7 shows a section similar to that in FIG. 5.

Der in Figur 1 dargestellte Bagger weist ein Raupenfahrwerk 1 auf, auf welchem ein Oberteil 2 drehbar gelagert ist. Auf dem Oberteil 2 ist eine Fahrerkabine 3 und daneben ein Ausleger 4 gelagert. Der Ausleger 4, welcher gewöhnlich aus mehreren Auslegerteilen, z.B. zwei Auslegerteilen 5, 6 zusammengesetzt ist, kann durch hydraulische Linearmotoren (nicht dargestellt) in seiner Lage verstellt werden. Am Ende des Auslegerteiles 6 ist ein Endarm 7 schwenkbar angelenkt, an dem ein Baggerlöffel 8 gelenkig angeordnet ist. Der Endarm 7 wird durch einen hydraulischen Linearmotor 9 gegenüber dem Auslegerteil 6 verschwenkt, welcher seinerseits am Auslegerteil 6 abgestützt ist. Am Arm 7 ist ein weiterer hydraulischer Linearmotor 10 gelagert, dessen Kolbenstange 11 an einem Schwenkhebel 12 angreift, welcher am Endarm 7 schwenkbar gelagert ist und die Hubbewegung des Linearmotors 10 auf den Baggerlöffel 8 überträgt. Der Baggerlöffel 8 ist mit zwei Gelenken versehen. Mit dem einen Gelenk 14 ist der Baggerlöffel 8 mit dem Endarm 7 gelenkig verbunden, während er mit dem Gelenk 15 über den Lenker 13 und dem Schwenkhebel 12 mit dem hydraulischen Linearmotor 10 verbunden ist. Der Linearmotor 10 schwenkt somit den Baggerlöffel 8 um das Gelenk 14. Dies ist die normale Verbindung zwischen dem Baggerlöffel 8 und dem Endarm 7, wenn der Bagger praktisch ausschliesslich mit dem Baggerlöffel 8 eingesetzt wird.The excavator shown in Figure 1 has a crawler track 1, on which an upper part 2 is rotatably mounted. On the upper part 2, a driver's cab 3 and a jib 4 are mounted. The boom 4, which usually consists of several boom parts, e.g. two boom parts 5, 6 is assembled, its position can be adjusted by hydraulic linear motors (not shown). At the end of the boom part 6, an end arm 7 is pivotally articulated, on which an excavator bucket 8 is articulated. The end arm 7 is pivoted by a hydraulic linear motor 9 relative to the boom part 6, which in turn is supported on the boom part 6. A further hydraulic linear motor 10 is mounted on the arm 7, the piston rod 11 of which engages on a pivot lever 12 which is pivotably mounted on the end arm 7 and transmits the stroke movement of the linear motor 10 to the excavator bucket 8. The excavator bucket 8 is provided with two joints. With one joint 14, the excavator bucket 8 is connected in an articulated manner to the end arm 7, while it is connected to the joint 15 via the link 13 and the pivoting lever 12 with the hydraulic linear motor 10. The linear motor 10 thus pivots the excavator bucket 8 around the joint 14. This is the normal connection between the excavator bucket 8 and the end arm 7 when the excavator is used practically exclusively with the excavator bucket 8.

In vielen Fällen wird jedoch der Bagger auch für weitere Arbeiten eingesetzt, beispielsweise mit einem Meissel, einem Hydraulikhammer und dergleichen. Wenn die Möglichkeit besteht, den Baggerlöffel rasch gegen ein anderes Arbeitsgerät auszuwechseln, wird die Einsatzmöglichkeit des Baggers wesentlich vergrössert.In many cases, however, the excavator is also used for other work, for example with a chisel, a hydraulic hammer and the like. If possible, the bucket quickly replace with another implement, the range of uses of the excavator is significantly increased.

In Fig. 2 ist die erfindungsgemässe Lösung einer Kupplungsvorrichtung 18 zum schnellen Wechseln von Arbeitsgeräten am Ausleger eines Baggers dargestellt. Aus Figur 1 ist erkennbar, dass der Baggerlöffel 8 mittels eines Verbindungsteiles 16, in dem auch die Gelenke 14, 15 angeordnet sind, mit dem Endarm 7 und dem Linearmotor 10 verbunden ist. Wie aus Fig. 2 ersichtlich ist, wird zur Bildung der Schnellkupplung der Verbindungsteil 16 mit den Gelenken 14, 15 zu einem Haltebügel 19 erweitert. Der Haltebügel 19 ist im wesentlichen als Winkelhebel mit zwei Haltearmen 20, 21 ausgebildet. Die beiden Haltearme 20, 21 weisen an ihren Enden, wie noch im einzelnen erläutert wird, Greifmittel auf, welche mit am Arbeitsgerät, d.h. am Baggerlöffel 8 angeordneten Haltemitteln zu einer festen Verbindung kuppelbar sind.2 shows the solution according to the invention of a coupling device 18 for quickly changing work tools on the boom of an excavator. It can be seen from FIG. 1 that the excavator bucket 8 is connected to the end arm 7 and the linear motor 10 by means of a connecting part 16, in which the joints 14, 15 are also arranged. As can be seen from FIG. 2, the connecting part 16 with the joints 14, 15 is expanded to form a holding bracket 19 in order to form the quick coupling. The bracket 19 is essentially designed as an angle lever with two holding arms 20, 21. The two holding arms 20, 21 have, as will be explained in more detail at their ends, gripping means which are also attached to the implement, i.e. arranged on the excavator bucket 8 holding means can be coupled to a fixed connection.

Der Baggerlöffel 8 weist als Abschluss gegen den Endarm eine Endfläche 23 auf, auf welcher eine Stützfläche 24 befestigt ist. Die Stützfläche 24 weist endarmseitig eine Wölbung 25 auf, auf welcher eine Stützplatte 26 befestigt ist. Die Stützfläche 24 erstreckt sich über die ganze Breite des Baggerlöffels 8 und liegt zwischen den Seitenwänden 30 desselben. Auf der Unterseite der Endfläche 23 des Baggers 8 ist eine Haltewelle 27 mittels Stegen 28 befestigt. Auf der Oberseite der Endfläche 23 ist mit Abstand zur Haltewelle 27 ein Lagersupport 31 befestigt, welcher eine zu den Gelenken 10, 15 parallele Bohrung 32 aufweist, die in einen nach oben sich erweiternden Schlitz 33 ausläuft. Die Haltewelle 27 und der Lagersupport 31 bilden die Haltemittel des Arbeitsgerätes.The excavator bucket 8 has an end surface 23 on which a support surface 24 is attached as a closure against the end arm. The support surface 24 has a curvature 25 on the end arm side, on which a support plate 26 is fastened. The support surface 24 extends over the entire width of the excavator bucket 8 and lies between the side walls 30 thereof. On the underside of the end face 23 of the excavator 8, a holding shaft 27 is fastened by means of webs 28. A bearing support 31 is fastened on the upper side of the end surface 23 at a distance from the holding shaft 27 and has a bore 32 parallel to the joints 10, 15, which runs into a slot 33 that widens upwards. The holding shaft 27 and the bearing support 31 form the holding means of the implement.

Die Greifmittel des Haltebügels 19 setzen sich aus einer Lagerhalbschale 35, die am einwärts gewölbten Ende des endarmseitigen Haltearmes 20 angeformt ist, und aus einer Kupplungswelle 37 zusammen. Die Kupplungswelle 37 ist im linearmotorseitigen Haltearm drehbar gelagert und ist mit einem Griffbügel 38 versehen, mittels welchem die Kupplungswelle 37 geschwenkt werden kann. Im Bereich des Lagersupportes 31 weist die Kupplungswelle 37 einen um einen Kreisabschnitt 39 verringerten Querschnitt auf. In der in Figur 2 dargestellten Lage des Kreisabschnittes 39 kann die Kupplungswelle 37 nicht aus dem Schlitz 33 entfernt werden. Der Kreisausschnitt 39 ist so angeordnet, dass in einer bestimmten Stellung des Griffbügels 38, z.B. in der gestrichelt dargestellten Lage, die Kupplungswelle 37 aus dem Schlitz 33 entfernt werden kann, nicht aber in einer andern z.B. in der ausgezogenen Stellung des Griffbügels 38.The gripping means of the holding bracket 19 are composed of a bearing half-shell 35, which is formed on the inwardly curved end of the holding arm 20 on the end arm side, and a coupling shaft 37. The clutch shaft 37 is in the linear arm-side support arm rotatably mounted and is provided with a handle bracket 38, by means of which the coupling shaft 37 can be pivoted. In the area of the bearing support 31, the coupling shaft 37 has a cross section reduced by a circular section 39. In the position of the circular section 39 shown in FIG. 2, the coupling shaft 37 cannot be removed from the slot 33. The circular section 39 is arranged such that in a certain position of the handle bar 38, for example in the position shown in broken lines, the coupling shaft 37 can be removed from the slot 33, but not in another position, for example in the extended position of the handle bar 38.

Der Haltebügel 19 ist zweckmässig aus zwei parallelen Stegen gebildet, die durch Querstege 34 miteinander verbunden sind. Zwischen den beiden Haltebügelstegen liegt dann der Lagersupport 31.The holding bracket 19 is expediently formed from two parallel webs which are connected to one another by transverse webs 34. The bearing support 31 then lies between the two retaining bracket webs.

In Figur 3 ist das Ankuppeln eines Arbeitsgerätes in Form des Baggerlöffels 8 dargestellt. Der Haltearm 20 des Haltebügels 19 umgreift mit der an seinem Ende 36 angeordneten Lagerhalbschale 35 die Haltewelle 27, während der andere linearmotorseitige Haltearm 21 sich in Pfeilrichtung gegen den Lagersupport 31 bewegt. Der Griffbügel 38 befindet sich in einer solchen Lage, dass die Kupplungswelle 37 mit dem Kreisausschnitt 39 durch den Schlitz 33 in die Bohrung 32 eingeführt werden kann. Nach dem Einführen in die Bohrung 32 wird der Griffbügel 38 in die in Fig. 2 dargestellte ausgezogene Stellung gebracht, wodurch er zwischen den Stegen des Haltebügels 19 liegt und geschützt ist. Die Kupplungswelle nimmt hierbei eine Lage ein, in welcher sie nicht aus der Bohrung 32 entfernt werden kann.FIG. 3 shows the coupling of an implement in the form of the excavator bucket 8. The holding arm 20 of the holding bracket 19 encompasses the holding shaft 27 with the bearing half shell 35 arranged at its end 36, while the other holding arm 21 on the linear motor side moves in the direction of the arrow against the bearing support 31. The handle bar 38 is in such a position that the coupling shaft 37 with the circular cutout 39 can be inserted into the bore 32 through the slot 33. After insertion into the bore 32, the handle bar 38 is brought into the extended position shown in Fig. 2, whereby it lies between the webs of the bracket 19 and is protected. The clutch shaft is in a position in which it cannot be removed from the bore 32.

Während der Kupplungsbewegung des Haltebügels 19 bewegt sich ein auf der Innenseite des Haltebügels 19 angeordnetes elastisches Druckelement 40 gegen die auf der Wölbung 25 der Stützfläche 24 befestigte Stützplatte 26. Das elastische Druckelement 40 ist an einem zwischen den Stegen des Haltebügels 21 befestigten Tragprofil 41 abgestützt. Das Druckelement 40 kann ein Gummi- oder Stahlfederelement sein, das durch seine Druckwirkung auf die Stützplatte 26 ein etwaiges Spiel zwischen dem Haltebügel 19 und dem Arbeitsgerät 8 aufhebt.During the coupling movement of the holding bracket 19, an elastic pressure element 40 arranged on the inside of the holding bracket 19 moves against that on the arch 25 of the support surface 24 attached support plate 26. The elastic pressure element 40 is supported on a support profile 41 fastened between the webs of the holding bracket 21. The pressure element 40 can be a rubber or steel spring element, which, through its pressure effect on the support plate 26, cancels any play between the holding bracket 19 and the implement 8.

In Figur 4-7 ist eine Variante der Kupplungsvorrichtung dargestellt, bei welcher die Lagerung des Haltearmes 20 in gleicher Weise wie bei der Ausführung nach Figur 2 und 3 über Lagerhalbschale 35 mit der Haltwelle 27 erfolgt, während in dem linearmotorseitigen Haltearm 21 eine volle Kupplungswelle 37′ gelagert ist. Im Lagersupport 31 des Baggerlöffels 8 ist eine Lagerhalbschale 42 befestigt, welche in der Kupplungsstellung an der Kupplungswelle 37′ anliegt, siehe Figur 5. Der Griffbügel 38 steht mit einer Kupplungsschale 43 in Verbindung, welche mittels eines Stiftes 44, z.B. eines Querspannstiftes, mit der Kupplungswelle 37′ verbunden ist. Durch Schwenken des Griffbügels 38 wird die Kupplungsschale 43 in die in Figur 6 gezeigte Entkupplungsstellung geschwenkt, so dass hierbei die Lagerhalbschale 42 des Lagersupportes 1 freigegeben wird, siehe Figur 7. Zum Kuppeln der Kupplungswelle 37′ der Lagerhalbschale 42 wird der Griffbügel 38 in der in Figur 4 angegebenen Teilrichtung geschwenkt. Aus Figur 5 ist ersichtlich, dass dann die Lagerhalbschale 42 durch die Kupplungsschale 43 an der Kupplungswelle 37′ festgehalten ist.4-7 shows a variant of the coupling device in which the mounting of the holding arm 20 takes place in the same way as in the embodiment according to FIGS. 2 and 3 via the bearing half-shell 35 with the holding shaft 27, while a full coupling shaft 37 is located in the holding arm 21 on the linear motor side 'Is stored. In the bearing support 31 of the excavator bucket 8, a bearing half-shell 42 is fastened, which in the coupling position rests on the coupling shaft 37 ', see Figure 5. The handle bar 38 is connected to a coupling shell 43 which is connected by means of a pin 44, e.g. a cross pin, with the coupling shaft 37 'is connected. By pivoting the handle bracket 38, the coupling shell 43 is pivoted into the decoupling position shown in Figure 6, so that the bearing half-shell 42 of the bearing support 1 is released, see Figure 7. For coupling the coupling shaft 37 'of the bearing half-shell 42, the handle bracket 38 is in the in Figure 4 pivoted specified direction. From Figure 5 it can be seen that the bearing half-shell 42 is then held by the coupling shell 43 on the coupling shaft 37 '.

Zweckmässig werden zwei Kupplungsschalen 43 vorgesehen, wie dies in Figur 5 und 7 gezeigt ist. Auf der Welle 37′ sind neben der Kupplungsschale 43 Befestigungsmittel 45, z.B. Halteringe, mit denen die Welle 37′ in den zwei Stegen des Haltebügels 19 geführt ist, vorgesehen.Two coupling shells 43 are expediently provided, as shown in FIGS. 5 and 7. On the shaft 37 'in addition to the coupling shell 43 fasteners 45, e.g. Retaining rings with which the shaft 37 'is guided in the two webs of the bracket 19, is provided.

Die beschriebene Kupplungsvorrichtung 18 ermöglicht es, die Bauhöhe zwischen dem Endarm 7 und dem Arbeitsgerät 8 etwa gleich gross zu halten wie bei einem Arbeitsgerät, das mit seinen auf der Endfläche 23 angeordneten Befestigungsmitteln direkt an den Gelenken 14 des Endarmes bzw. des Lenkers 13 angekuppelt ist. Jedoch lassen sich mit der beschriebenen Kupplungsvorrichtung verschiedene andere Arbeitsgeräte schnell und problemlos auswechseln. Der aus zwei Stegen mit Querstäben 34 bestehende Haltebügel 19 lässt sich als Schweisskonstruktion aus Stahlblech herstellen, deren Dicke entsprechend den auftretenden Beanspruchungen ausreichend stark (15-20 mm) gewählt werden kann.The coupling device 18 described enables the overall height between the end arm 7 and the implement 8 to be approximately the same to be kept large as in the case of an implement which is coupled directly to the joints 14 of the end arm or of the handlebar 13 with its fastening means arranged on the end face 23. However, various other implements can be replaced quickly and easily with the coupling device described. The retaining bracket 19 consisting of two webs with cross bars 34 can be produced as a welded construction made of sheet steel, the thickness of which can be chosen to be sufficiently strong (15-20 mm) in accordance with the stresses that occur.

Claims (7)

1. Kupplungsvorrichtung (18) zum Ankuppeln eines Arbeitsgerätes (8) für die Boden- und Bautechnik, welches an dem Endarm (7) eines Auslegers (4) einer Baumaschine, insbesondere eines Bag­gers, mittels einer Achse befestigt und durch einen, dem Endarm zugeordneten Linearmotor (10) zum Schwenken des Arbeitsgerätes um die Achse betätigbar ist, wobei der Endarm und die Kolbenstange (11) des Linearmotors bzw. ein über einen Schwenkhebel (12) mit der Kolbenstange verbundener Lenker (13) an den freien Enden miteinander und mit dem Arbeitsgerät durch ein Verbindungsteil verbunden sind, dadurch gekennzeichnet, dass zum leichten Trennen des Arbeitsgerätes (8) von dem Ausleger (4) und zum schnellen Befestigen desselben an dem Ausleger das Verbindungsteil durch einen an seinen beiden Enden angeordneten Haltearm (20, 21) zu einem vom Arbeitsgerät getrennten Haltebügel (19) ausgebildet ist, wobei Greifmittel (35, 37) des Haltebügels mit an dem Arbeitsgerät in seinem Trenn- und Befestigungsbereich angeordneten Haltemitteln (27, 31) kuppelbar sind.1. Coupling device (18) for coupling an implement (8) for soil and construction technology, which is attached to the end arm (7) of a boom (4) of a construction machine, in particular an excavator, by means of an axis and by one assigned to the end arm Linear motor (10) for pivoting the implement can be actuated about the axis, the end arm and the piston rod (11) of the linear motor or a link (13) connected to the piston rod via a pivoting lever (12) at the free ends to one another and to the Working device are connected by a connecting part, characterized in that for easy separation of the working device (8) from the boom (4) and for fast fastening thereof to the boom, the connecting part by means of a holding arm (20, 21) arranged at both ends thereof into one Holding bracket (19) separate from the working device is formed, gripping means (35, 37) of the holding bracket also being attached to the working device in its separating and fastening area orderly holding means (27, 31) can be coupled. 2. Kupplungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Haltebügel (19) mit seinen beiden Haltearmen (20, 21) einen Winkelhebel bildet, wobei der endarmseitig befindliche Haltearm (20) an seinem einwärts gewölbten Ende (36) eine konkave Lagerhalbschale (35) und der linearmotorseitige Haltearm (21) an seinem Ende eine quer zum Haltebügel verlaufende Kupplungswelle (37) trägt, an welcher ein Griffbügel (38) befestigt ist, mittels welchem die Kupplungswelle drehbar ist.2. Coupling device according to claim 1, characterized in that the holding bracket (19) forms an angle lever with its two holding arms (20, 21), the holding arm (20) on the end arm side having a concave bearing half-shell (35) on its inwardly curved end (36) ) and the linear motor-side holding arm (21) carries at its end a coupling shaft (37) running transversely to the holding bracket, to which a handle bracket (38) is fastened, by means of which the coupling shaft can be rotated. 3. Kupplungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Haltemittel (27, 31) des Arbeitsgerätes (8) über und unter seiner obern Endfläche (23) angeordnet sind, wobei eine Haltewelle (27) quer zum Haltebügel (19) unter der Endfläche befestigt ist, an welcher sich die Lagerhalbschale (35) des endarmseitigen Haltearmes (20) beim Befestigen des Arbeitsgerätes anlegt und über der Endfläche mindestens ein Lagersupport (31) zur Aufnahme der Kupplungswelle (37, 37′) des Haltebügels (19) fest angeordnet ist.3. Coupling device according to claim 1 or 2, characterized in that the holding means (27, 31) of the implement (8) arranged above and below its upper end surface (23) A retaining shaft (27) is fastened transversely to the retaining bracket (19) under the end face, on which the bearing half-shell (35) of the end arm-side retaining arm (20) attaches when attaching the implement and at least one bearing support (31) over the end face Receiving the coupling shaft (37, 37 ') of the bracket (19) is fixed. 4. Kupplungsvorrichtung nach Anspruch (1), dadurch gekennzeichnet, dass zur spielfreien Halterung des Haltebügels (19) an dem Arbeitsgerät (8) auf der Innenseite des Haltebügels in der Kehle des Winkels ein elastisches Druckelement (40) befestigt ist, welches bei dem mit dem Arbeitsgerät gekuppelten Haltebügels mit Vorspannung auf eine Stützfläche (26) auf der Oberseite der Endfläche (23) des Arbeitsgerätes wirkt.4. Coupling device according to claim (1), characterized in that for the play-free mounting of the bracket (19) on the implement (8) on the inside of the bracket in the throat of the angle, an elastic pressure element (40) is attached, which in the the bracket coupled to the implement with pretension acts on a support surface (26) on the top of the end surface (23) of the implement. 5. Kupplungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Haltebügel (19) aus zwei Stegen gebildet ist, die durch Querstege (34) miteinander verbunden sind.5. Coupling device according to claim 1, characterized in that the holding bracket (19) is formed from two webs which are connected to one another by transverse webs (34). 6. Kupplungsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Lagersupport (31) des Arbeitsgerätes (8) eine Bohrung (32) mit einem von der Endfläche (23) weggerichteten Schlitz (33) zum Einlegen der Kupplungswelle (37) aufweist, bei welcher im Bereich des Lagersupports (31) von dem Kreisquerschnitt der Kupplungswelle (37) ein Kreisabschnitt (39) entfernt ist, derart, dass die Kupplungswelle (37) eine kleinere Breite als die Breite des Schlitzes (33) des Lagersupportes (31) aufweist.6. Coupling device according to claim 3, characterized in that the bearing support (31) of the implement (8) has a bore (32) with a slot (33) directed away from the end face (23) for inserting the coupling shaft (37), in which In the area of the bearing support (31), a circular section (39) is removed from the circular cross section of the coupling shaft (37), such that the coupling shaft (37) has a smaller width than the width of the slot (33) of the bearing support (31). 7. Kupplungsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Lagersupport (31) des Arbeitsgerätes (8) eine Lagerhalbschale (42) aufweist, welche in der Kupplungsstellung an der Kupplungswelle (37) anliegt und in dieser Lage von den an der Kupplungswelle befestigten Kupplungsschalen (43) gehalten wird.7. Coupling device according to claim 3, characterized in that the bearing support (31) of the implement (8) has a bearing half-shell (42) which bears against the coupling shaft (37) in the coupling position and in this position is held by the coupling shells (43) attached to the coupling shaft.
EP88121217A 1987-12-22 1988-12-19 Tool-connecting device for an excavator Expired - Lifetime EP0321902B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88121217T ATE103027T1 (en) 1987-12-22 1988-12-19 COUPLING DEVICE FOR COUPLING AN IMPLEMENT TO THE BOOM OF A CONSTRUCTION MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5004/87A CH675266A5 (en) 1987-12-22 1987-12-22
CH5004/87 1987-12-22

Publications (2)

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EP0321902A1 true EP0321902A1 (en) 1989-06-28
EP0321902B1 EP0321902B1 (en) 1994-03-16

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EP88121217A Expired - Lifetime EP0321902B1 (en) 1987-12-22 1988-12-19 Tool-connecting device for an excavator

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EP (1) EP0321902B1 (en)
AT (1) ATE103027T1 (en)
CH (1) CH675266A5 (en)
DE (1) DE3888492D1 (en)

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US5141385A (en) * 1989-06-29 1992-08-25 Steelfab Limited Implement attachment coupler
EP0864697A1 (en) * 1997-03-10 1998-09-16 Clark Equipment Company Attachment construction for earthworking implement
US5983535A (en) * 1997-03-10 1999-11-16 Clark Equipment Company Fastener secured frame for boom mounted quick change bracket
US6163989A (en) * 1997-03-10 2000-12-26 Clark Equipment Company Frame for mounting on a boom mounted quick change bracket
FR2852615A1 (en) * 2003-03-18 2004-09-24 Liebherr Hydraulikbagger Tool e.g. hydraulic dipper and grapple, changer for e.g. excavator shovel, has bearing position receiving socket that is formed in half-shell shape with large support angle and is made from material having high resistance to wear
EP1983147A2 (en) * 2007-04-16 2008-10-22 Liebherr-Werk Nenzing GmbH Construction device, leads and method for mounting leads on construction device
WO2015110209A1 (en) * 2014-01-22 2015-07-30 Caterpillar Work Tools B.V. Exchange system for implement of machine

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Publication number Priority date Publication date Assignee Title
US11035094B1 (en) 2020-01-10 2021-06-15 Ferguson Trailer Transport, Inc. Device and method for extending material mover reach

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FR2436743A1 (en) * 1978-09-25 1980-04-18 Laan Roelof Tool coupling mechanism to excavator boom - has intermediate piece between boom and control spindles coupled to tool adaptor
US4225283A (en) * 1979-02-15 1980-09-30 J. I. Case Company Backhoe bucket quick coupling
US4295287A (en) * 1980-04-10 1981-10-20 J. I. Case Company Backhoe bucket quick coupler
EP0122547A1 (en) * 1983-04-07 1984-10-24 Karl Schaeff GmbH &amp; Co. Quick-change device
WO1985004440A1 (en) * 1984-03-29 1985-10-10 Daryl John Spencer Hitch assemblies
US4643631A (en) * 1985-04-22 1987-02-17 J. I. Case Company Quick coupling and release mechanism for buckets

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FR2436743A1 (en) * 1978-09-25 1980-04-18 Laan Roelof Tool coupling mechanism to excavator boom - has intermediate piece between boom and control spindles coupled to tool adaptor
US4225283A (en) * 1979-02-15 1980-09-30 J. I. Case Company Backhoe bucket quick coupling
US4295287A (en) * 1980-04-10 1981-10-20 J. I. Case Company Backhoe bucket quick coupler
EP0122547A1 (en) * 1983-04-07 1984-10-24 Karl Schaeff GmbH &amp; Co. Quick-change device
WO1985004440A1 (en) * 1984-03-29 1985-10-10 Daryl John Spencer Hitch assemblies
US4643631A (en) * 1985-04-22 1987-02-17 J. I. Case Company Quick coupling and release mechanism for buckets

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5141385A (en) * 1989-06-29 1992-08-25 Steelfab Limited Implement attachment coupler
EP0864697A1 (en) * 1997-03-10 1998-09-16 Clark Equipment Company Attachment construction for earthworking implement
US5974706A (en) * 1997-03-10 1999-11-02 Clark Equipment Company Attachment construction for earthworking implement
US5983535A (en) * 1997-03-10 1999-11-16 Clark Equipment Company Fastener secured frame for boom mounted quick change bracket
US6154989A (en) * 1997-03-10 2000-12-05 Clark Equipment Company Attachment construction for earthworking implement
US6163989A (en) * 1997-03-10 2000-12-26 Clark Equipment Company Frame for mounting on a boom mounted quick change bracket
FR2852615A1 (en) * 2003-03-18 2004-09-24 Liebherr Hydraulikbagger Tool e.g. hydraulic dipper and grapple, changer for e.g. excavator shovel, has bearing position receiving socket that is formed in half-shell shape with large support angle and is made from material having high resistance to wear
US7086804B2 (en) 2003-03-18 2006-08-08 Liebherr-Hydraulikbagger Gmbh Quick-change attachment
EP1983147A2 (en) * 2007-04-16 2008-10-22 Liebherr-Werk Nenzing GmbH Construction device, leads and method for mounting leads on construction device
EP1983147A3 (en) * 2007-04-16 2009-01-28 Liebherr-Werk Nenzing GmbH Construction device, leads and method for mounting leads on construction device
WO2015110209A1 (en) * 2014-01-22 2015-07-30 Caterpillar Work Tools B.V. Exchange system for implement of machine

Also Published As

Publication number Publication date
CH675266A5 (en) 1990-09-14
EP0321902B1 (en) 1994-03-16
DE3888492D1 (en) 1994-04-21
ATE103027T1 (en) 1994-04-15

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