EP0392972A2 - Coupling for an excavator bucket - Google Patents

Coupling for an excavator bucket Download PDF

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Publication number
EP0392972A2
EP0392972A2 EP90810171A EP90810171A EP0392972A2 EP 0392972 A2 EP0392972 A2 EP 0392972A2 EP 90810171 A EP90810171 A EP 90810171A EP 90810171 A EP90810171 A EP 90810171A EP 0392972 A2 EP0392972 A2 EP 0392972A2
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EP
European Patent Office
Prior art keywords
coupling
coupling part
threaded rod
wedges
excavator
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
EP90810171A
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German (de)
French (fr)
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EP0392972A3 (en
EP0392972B1 (en
Inventor
Pietro Pallotta
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Individual
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Individual
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Publication date
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Priority to AT90810171T priority Critical patent/ATE94930T1/en
Publication of EP0392972A2 publication Critical patent/EP0392972A2/en
Publication of EP0392972A3 publication Critical patent/EP0392972A3/en
Application granted granted Critical
Publication of EP0392972B1 publication Critical patent/EP0392972B1/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
    • E02F3/364—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using wedges
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3663—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat hydraulically-operated

Definitions

  • the present invention relates to a coupling for excavator buckets, by means of which the boom of an excavator can be non-positively and releasably connected to an excavator bucket.
  • Various such couplings are already known. These consist essentially of two mating coupling parts, of which the lower one is fixed to the bucket and the upper one is fixed to the boom. The tight fit of these two coupling parts is intended to achieve a connection that is as torsion-free as possible in all directions with a low overall height of the coupling.
  • the overall height of the coupling which is understood to mean the distance between the boom and the Sagger spoon when coupled, should therefore be small.
  • the couplings have elements in order to non-positively but releasably connect the two coupling parts to be coupled.
  • a bolt is used which penetrates the two coupling parts in the coupled state and which can be secured in this position.
  • the coupling and uncoupling then requires manual work.
  • the two coupling parts to be coupled are one inside the other at the lower coupling part about a pipe section which acts as a pivot axis swiveling.
  • the upper coupling part has a correspondingly shaped concave surface which forms the inner wall of a hollow half cylinder.
  • the upper coupling part lies inside the box-shaped, lower coupling part.
  • the elements for the non-positive connection of the two coupling parts are then given in that the upper, also box-shaped coupling part has openings in its wall which serve to receive lugs which are formed on the inner wall of the lower coupling part.
  • the undersides of the lugs facing the bottom surface of the lower coupling part are then at a slight angle to the underside of the upper coupling part.
  • Movable wedges are then arranged in this upper coupling part, which can be moved under the lugs by means of screw threads, with which they non-positively connect the two coupling parts.
  • Couplings are also known in which the non-positive connection of the coupling parts takes place by means of pivotable claws, which in turn are then either pivoted and secured by hand or by means of hydraulic or electrical means, similar to those already described above.
  • the spoons would be changed more often and better adapted to the work to be done. This would make the dredging work more efficient. Because the change of the excavator bucket could also be done significantly faster, the excavators would also be better occupied in terms of time.
  • a coupling for coupling an excavator bucket to the boom of an excavator which consists of a lower, box-shaped coupling part, which is firmly attached to the excavator bucket, and an upper box-shaped coupling part, which can be inserted or swiveled into the lower one, whereby lugs are formed on the inside of the lower coupling part, which protrude in the coupled state of the two coupling parts through openings in the side walls of the upper coupling part inside and under each of which a wedge can be pushed, characterized in that a single threaded rod with two opposite threads through two wedges and the Ge winch rod can be driven by means of a hydrostat arranged in the interior of the upper coupling part.
  • FIG. 1 shows the coupling 1 in the uncoupled state, attached to a boom 2 and bucket 3 of an excavator.
  • the clutch 1 consists of two clutch parts.
  • the lower coupling part 4 is firmly attached to the excavator bucket 3, while the upper coupling part 5 is firmly connected to the boom 2.
  • this connection is articulated in that the coupling part 5 has two side walls 6 on its upper side, which are provided with holes for receiving bolts. Are in the attached state these side walls 6 slipped over the end of the boom, which here consists of two boom arms 7, 8.
  • Both cantilever arms 7, 8 have a transverse hole 9 at their end. The distance between the two mouth planes of each transverse hole 9 corresponds to the distance between the two side walls 6.
  • the coupling part 5 is box-shaped on its undersides, the inside of the box formed in this way serving to receive the elements for non-positive coupling with the lower coupling part 4.
  • the side walls 10 of this box have openings 11.
  • the lower coupling part 4 is also box-shaped. This coupling part 4 can be firmly connected to the excavator bucket 3 in such a way that it is firmly welded to it.
  • lugs 13 are formed, which protrude at right angles from these inner sides. These lugs 13 each have an underside 14, against the side wall 12 on which the lug 13 in question is formed, and there with also runs slightly obliquely downwards against the bottom surface inside the coupling part 5.
  • the two coupling parts 4 and 5 are pivoted together for engaging or coupling the excavator bucket 3.
  • the lower coupling part 4 has a pipe section 15 connecting it between its side walls 12.
  • the rear of the coupling part 5 has a concave surface 16 which represents the inner surface of a hollow cylinder and whose radius corresponds to the outer radius of the pipe section 15.
  • the excavator operator brings the upper coupling part 5 to lie on the boom with this concave surface 16 on the pipe section 15. For this maneuver, he can largely see both the surface 16 and the pipe section from the driver's cab.
  • it pivots the upper coupling part 5 into the lower coupling part 4. This is done by advancing the cantilever arm 8 relative to the cantilever arm 7.
  • the coupling is locked, for which purpose the means in the interior of the upper coupling part 5 are used, which cannot be seen in this figure.
  • This locking mechanism is shown in FIG. 2, in that the clutch is shown in a section from the front in the swiveled-in state of the two clutch parts 4 and 5. In the situation shown here has not yet been locked.
  • Inside the coupling part 5 two wedges 17 are now arranged, each made of a steel square partially wedge-shaped cross section.
  • the wedge surfaces 18 have the same slope as the undersides 14 of the lugs 13, that is to say run parallel to those. Both wedges 17 are traversed by a common threaded rod 19.
  • This threaded rod 19 is rotatably mounted in the side surfaces 10 of the upper coupling part 5.
  • ball bearings 21 can be provided.
  • the threads 22 and 23, which the threaded rod 19 has, are directed in opposite directions to one another. This means that a thread 22 is a right-hand thread and the thread 23 is a left-hand thread or vice versa.
  • the threaded rod 19 carries a ring gear 20, which serves to drive the threaded rod 19, so that it can be rotated as desired.
  • the wedges 17 shift exactly opposite. On the one hand, they can be pushed under the lugs 13 in this way, with which they press the upper coupling part 5 firmly against the lower 4.
  • the threaded rod 19 is driven via the toothed ring 20, which in turn is driven by a roller chain 24, as can be seen from FIG. 3, which shows the mechanism in a top view.
  • the pipe section 15 on the lower coupling part 4, against which the upper coupling part 5 with its concave surface 16 lies, is also recognizable.
  • the lugs 13 formed on the inside of the side surfaces 12 protrude through the openings 11 in the side walls 10 into the interior of the upper coupling part 5.
  • the threaded rod 19 with the two opposing threads 22, 23 is mounted in the side walls 10 of the upper coupling part 5.
  • Figure 4 shows the same as Figure 3, but seen in a section from the side.
  • the upper 5 and the lower coupling part 4, as well as the lugs 13 on the lower and the openings 11 on the upper coupling part 5, as well as the wedges 17 and their drive means, namely the threaded rod 19, the roller chain 24 and the hydrostatic unit 25, can again be seen Stop bar 26, along which the wedges 17 are guided, is visible.
  • the pipe section 15 on the lower coupling part 4 and the concave surface 16 on the upper coupling part 5, which abuts the pipe section 15, can be seen in this figure.
  • the pivoting of the upper coupling part 5 relative to the lower 4 therefore takes place about the axis of the pipe section 15.
  • both the side surfaces 12 of the lower coupling part 4 and the side surfaces 10 of the upper coupling part 5 can be slightly conical to one another. If the upper coupling part 5 is then inserted or pivoted into the lower coupling part, it is additionally clamped laterally in the lower coupling part 4.
  • the end wall opposite the pipe section 15 or the conical surface 16 of both the lower 4 and the upper coupling part 5 can also run slightly upward with increasing radius towards the inside. This also causes jamming in the direction perpendicular to the pipe section 15 when the upper coupling part 5 is pivoted into the lower 4.
  • the drive mechanism according to the invention brings significant advantages over the conventional ones.
  • the advantages of a hydraulic drive were combined with those of a mechanical one.
  • the known hydraulic locking mechanisms lacked effective self-locking. If the hydraulic cylinder-piston unit leaks, the lock can loosen and, in the worst case, the excavator can lose its bucket. This has been remedied by the fact that for a hydrostatic drive 25 is used in the drive, which in turn drives a threaded rod 19 which has a natural self-locking feature, so that even with the heaviest stress on the excavator spoon and corresponding vibrations and impacts on the clutch 1, the latter cannot be released.
  • hydrostat 25 no longer needs to be subjected to hydraulic pressure. In contrast to a cylinder-piston unit, it is not constantly under pressure, but only when the locking mechanism is actually actuated. A hydrostat can also be built very robustly, so that it is many times more reliable and durable compared to the alternative of an electric motor. In addition, many excavators already have additional hydraulic connections, from which the supply of hydrostat 25 with hydraulic pressure fluid can be ensured without major structural changes to the excavator itself.
  • the clutch 1 according to the invention can therefore be actuated in the simplest manner by the excavator operator from his cabin.
  • Their simple design which allows the two coupling parts 4, 5 to pivot into one another, enables excavator buckets to be coupled and uncoupled without manual manipulations on the coupling itself, so that it is no longer necessary for the excavator operator to get out of the vehicle or to call in auxiliary personnel. But that can be worth it Save full machine hours and also create an incentive to work increasingly with the optimal excavator bucket.
  • the coupling also works for other tools instead of excavator buckets, for example for demolition hammers and the like.

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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)
  • Earth Drilling (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Clamps And Clips (AREA)
  • Shovels (AREA)

Abstract

The coupling (1) consists of two coupling parts (4, 5) which can be pivoted one inside the other for coupling. They can be locked and clamped in this position by means of two wedges which are arranged so as to be laterally displaceable in the top coupling part (5). For this purpose, the wedges are pushed in a diametrically opposed manner under the projections (13) by being moved by a common threaded rod having two opposed threads, which threaded rod passes through the wedges. The threaded rod is driven via a roller chain by a hydrostatic drive arranged in the top coupling part (5). <IMAGE>

Description

Die vorliegende Erfindung betrifft eine Kupplung für Bag­gerlöffel, mittels welcher der Ausleger eines Baggers kraftschlüssig und lösbar mit einem Baggerlöffel verbind­bar ist.
Es sind schon verschiedene solche Kupplungen bekannt. Diese bestehen im wesentlichen aus zwei ineinanderpassen­den Kupplungsteilen, von denen das untere fest am Bagger­löffel und das obere fest am Ausleger befestigt ist. Durch das satte Ineinanderpassen dieser beiden Kupplungs­teile soll eine in allen Richtungen möglichst verwin­dungsfreie Verbindung bei gleichzeitig geringer Bauhöhe der Kupplung erreicht werden. Die Bauhöhe der Kupplung, worunter die Distanz zwischen dem Ausleger und dem Sag­gerlöffel im eingekuppelten Zustand verstanden wird, soll also klein sein. Je grösser sie nämlich ausfällt, umso mehr wird die Kraft des Baggers infolge der Verlängerung des wirksamen Lastarmes reduziert. Zum andern weisen die Kupplungen Elemente auf, um die beiden zu kuppelnden Kupplungsteile kraftschlüssig, jedoch lösbar miteinander zu verbinden. Im einfachsten Fall verwendet man einen Bolzen, welcher die beiden Kupplungsteile im zusammenge­kuppelten Zustand durchdringt und der in dieser Lage sicherbar ist. Das Kuppeln und Entkuppeln bedarf dann je­doch manueller Arbeit. Oft sind die beiden zu kuppelnden Kupplungsteile um einen als Schwenkachse wirkenden Rohrabschnitt am unteren Kupplungsteil ineinander schwenkbar. Das obere Kupplungsteil weist hierzu eine entsprechend geformte konkave Fläche auf, welche die In­nenwand eines hohlen Halbzylinders bildet. Sind die Kupp­lungsteile um die Achse des Rohrabschnittes ineinanderge­schwenkt, so liegt das obere Kupplungsteil im Innern des kastenförmigen, unteren Kupplungsteils. Die Elemente zum kraftschlüssigen Verbinden der beiden Kupplungsteile sind dann dadurch gegeben, dass das obere, ebenfalls kasten­förmig ausgebildete Kupplungsteil in seiner Wandung Oeff­nungen aufweist, die zur Aufnahme von Nasen dienen, wel­che an der Innenwand des unteren Kupplungsteils angeformt sind. Die zur Bodenfläche des unteren Kupplungsteils ge­wandten Unterseiten der Nasen stehen dann leicht schräg zur Unterseite des obere Kupplungsteils. In diesem oberen Kupplungsteil sind dann bewegliche Keile angeordnet, die mittels Schraubgewinden unter die Nasen verschoben werden können, womit sie die beiden Kupplungsteile kraftschlüs­sig miteinander verbinden. Es sind bereits Kupplungen vorgeschlagen worden, bei denen diese Keile automatisch betätigt werden können, zum Beispiel, indem ein Elektro­motor die entsprechenden Gewindestangen dreht oder indem eine hydraulische Zylinder-Kolben-Einheit die Keile di­rekt betätigt. Keines dieser Systeme hat sich jedoch überzeugend bewährt. Die Elektromotoren ertragen die starken Schläge beim Baggerbetrieb auf die Dauer nicht. Das gleiche gilt auch für eine hydraulische Zylinder-Kol­ben-Einheit, welche unter den fortwährend auf sie einwir­kenden Schlägen fruher oder später undicht wird. Damit aber droht der Anpressdruck der Keile unter die Nasen ab­zusinken und der Bagger könnte gar seinen Löffel verlie­ren, was ein unakzeptables Gefahrenmoment darstellt.The present invention relates to a coupling for excavator buckets, by means of which the boom of an excavator can be non-positively and releasably connected to an excavator bucket.
Various such couplings are already known. These consist essentially of two mating coupling parts, of which the lower one is fixed to the bucket and the upper one is fixed to the boom. The tight fit of these two coupling parts is intended to achieve a connection that is as torsion-free as possible in all directions with a low overall height of the coupling. The overall height of the coupling, which is understood to mean the distance between the boom and the Sagger spoon when coupled, should therefore be small. The bigger it turns out, the more the power of the excavator is reduced due to the extension of the effective load arm. On the other hand, the couplings have elements in order to non-positively but releasably connect the two coupling parts to be coupled. In the simplest case, a bolt is used which penetrates the two coupling parts in the coupled state and which can be secured in this position. The coupling and uncoupling then requires manual work. Often, the two coupling parts to be coupled are one inside the other at the lower coupling part about a pipe section which acts as a pivot axis swiveling. For this purpose, the upper coupling part has a correspondingly shaped concave surface which forms the inner wall of a hollow half cylinder. If the coupling parts are pivoted into one another about the axis of the pipe section, the upper coupling part lies inside the box-shaped, lower coupling part. The elements for the non-positive connection of the two coupling parts are then given in that the upper, also box-shaped coupling part has openings in its wall which serve to receive lugs which are formed on the inner wall of the lower coupling part. The undersides of the lugs facing the bottom surface of the lower coupling part are then at a slight angle to the underside of the upper coupling part. Movable wedges are then arranged in this upper coupling part, which can be moved under the lugs by means of screw threads, with which they non-positively connect the two coupling parts. Couplings have already been proposed in which these wedges can be actuated automatically, for example by an electric motor rotating the corresponding threaded rods or by a hydraulic cylinder-piston unit actuating the wedges directly. However, none of these systems has proven convincingly. In the long run, the electric motors cannot withstand the strong blows from excavators. The same also applies to a hydraulic cylinder-piston unit, which sooner or later leaks under the blows which continuously act on it. In order to but the pressure of the wedges under the nose threatens to drop and the excavator could even lose its bucket, which is an unacceptable moment of danger.

Es sind auch Kupplungen bekannt, bei denen die kraft­schlüssige Verbindung der Kupplungsteile mittels schwenk­baren Klauen erfolgt, die dann wiederum entweder von Hand geschwenkt und gesichert werden oder mittels hydrauli­schen oder elektrischen Mitteln, ähnlich den weiter oben bereits beschriebenen.Couplings are also known in which the non-positive connection of the coupling parts takes place by means of pivotable claws, which in turn are then either pivoted and secured by hand or by means of hydraulic or electrical means, similar to those already described above.

Es ist klar, dass die Ideen, welche den herkömmlichen Kupplungen zugrundeliegen, auf verschiedenste Weisen kom­biniert und realisiert werden können.It is clear that the ideas on which the conventional couplings are based can be combined and implemented in a variety of ways.

Ein automatisches Kuppeln und Entkuppeln des Baggerlöf­fels ist grundsätzlich sehr erwünscht. In der Praxis er­fordert das Wechseln des Baggerlöffels erheblich Zeit, in welcher der Bagger ja nicht arbeiten kann. Aus Bequem­lichkeit wird oft mit einem nicht optimalen Baggerlöffel gearbeitet, sodass die Arbeit nicht effizient vonstatten geht oder der Baggerlöffel infolge seiner schlechten Eig­nung für die betreffende Arbeit Schaden nimmt. Gerade wenn die Witterungsbedingungen schlecht sind, wenn es also kalt und nass ist, oder zum Beispiel der Arbeits­platz des Baggers morastig ist, steigt der Baggerführer nur ungern aus seiner Führer-Kabine und auch das Hilfs­personal reisst sich nicht um die mühsame Arbeit des Löffelwechselns. Eine Kupplung, die automatisch von der Baggerkabine aus betätigbar wäre und zudem absolut zuver­lässig, bedienerfreundlich und schnell zu betätigen wäre, würde grosse Vorteile bringen. Die Löffel würden öfter gewechselt und besser den vorzunehmenden Arbeiten ange­passt. Damit würde die Baggerarbeit effizienter erfolgen. Weil das Wechseln des Baggerlöffels zudem bedeutend schneller erfolgen könnte, wären die Bagger auch zeitlich besser ausgelastet.Automatic coupling and uncoupling of the excavator bucket is generally very desirable. In practice, changing the excavator bucket takes a considerable amount of time, in which the excavator cannot work. For convenience, a non-optimal backhoe bucket is often used, so that the work is not carried out efficiently or the backhoe bucket is damaged due to its poor suitability for the job in question. Especially when the weather conditions are bad, i.e. when it is cold and wet, or, for example, the excavator's workplace is swampy, the excavator operator is reluctant to climb out of his driver's cab and the auxiliary staff is not tired of the tedious work of changing the bucket. A clutch that could be operated automatically from the excavator cab and that would also be absolutely reliable, user-friendly and quick to operate, would bring great benefits. The spoons would be changed more often and better adapted to the work to be done. This would make the dredging work more efficient. Because the change of the excavator bucket could also be done significantly faster, the excavators would also be better occupied in terms of time.

Es ist deshalb die Aufgabe der vorliegenden Erfindung, eine Kupplung für Baggerlöffel zu schaffen, welche die eingangs erwähnten Nachteile überwindet, insbesondere rasch automatisch von der Baggerkabine aus kuppelbar ist und trotzdem dauerhaft arbeitet und die erforderliche Stabilität bei geringer Baugrösse erreicht.It is therefore the object of the present invention to provide a clutch for excavator buckets, which overcomes the disadvantages mentioned at the outset, in particular can be quickly and automatically coupled from the excavator cab and nevertheless works permanently and achieves the required stability with a small size.

Diese Aufgabe wird gelöst von einer Kupplung zum Kuppeln eines Baggerlöffels an den Ausleger eines Baggers, die aus einem unteren, kastenförmigen Kupplungsteil besteht, der fest am Baggerlöffel angebaut ist, und einem oberen kastenförmigen Kupplungsteil, der satt in den unteren hineinsteckbar oder hineinschwenkbar ist, wobei an den Innenseiten des unteren Kupplungsteils Nasen angeformt sind, die im gekuppelten Zustand der beiden Kupplungs­teile durch Oeffnungen in den Seitenwänden des obere Kupplungsteiles in dessen Inneres ragen und unter die je ein Keil schiebbar ist, dadurch gekennzeichnet, dass eine einzige Gewindestange mit zwei gegenläufigen Gewinden die beiden Keile gewindekraftschlüssig durchsetzt und die Ge­ windestange mittels eines im Innern des oberen Kupp­lungsteiles angeordneten Hydrostaten antreibbar ist.This object is achieved by a coupling for coupling an excavator bucket to the boom of an excavator, which consists of a lower, box-shaped coupling part, which is firmly attached to the excavator bucket, and an upper box-shaped coupling part, which can be inserted or swiveled into the lower one, whereby lugs are formed on the inside of the lower coupling part, which protrude in the coupled state of the two coupling parts through openings in the side walls of the upper coupling part inside and under each of which a wedge can be pushed, characterized in that a single threaded rod with two opposite threads through two wedges and the Ge winch rod can be driven by means of a hydrostat arranged in the interior of the upper coupling part.

Eine beispielsweise Ausführung der Erfindung ist in den Figuren in verschiedenen Ansichten gezeigt und anhand dieser Figuren wird die Erfindung nachfolgend beschrieben und deren Funktion erklärt und erläutert.An example of an embodiment of the invention is shown in the figures in various views, and the invention is described below with the aid of these figures, and its function is explained and explained.

Es zeigt:

  • Figur 1 Die Kupplung im entkuppelten Zustand in einer perspektivischen Ansicht;
  • Figur 2 Die Kupplung im gekuppelten Zustand in einem Schnitt von vorne;
  • Figur 3 Die Kupplung im gekuppelten Zustand in einer Draufsicht;
  • Figur 4 Die Kupplung im gekuppelten Zustand von der Seite in einem Schnitt.
It shows:
  • Figure 1 The coupling in the uncoupled state in a perspective view;
  • Figure 2 The coupling in the coupled state in a section from the front;
  • Figure 3 The coupling in the coupled state in a plan view;
  • Figure 4 The coupling in the coupled state from the side in a section.

Die Figur 1 zeigt die Kupplung 1 im entkuppelten Zustand, angebaut an einen Ausleger 2 und Baggerlöffel 3 eines Baggers. Die Kupplung 1 besteht aus zwei Kupplungsteilen. Das untere Kupplungsteil 4 ist fest am Baggerlöffel 3 an­gebaut, während das obere Kupplungsteil 5 fest mit dem Ausleger 2 verbunden ist. Diese Verbindung ist jedoch ge­lenkig, indem das Kupplungsteil 5 auf seiner Oberseite zwei Seitenwände 6 aufweist, die mit Löchern zur Aufnahme von Bolzen versehen sind. Im angebauten Zustand sind diese Seitenwände 6 über das Ende des Auslegers gestülpt, welcher hier aus zwei Auslegerarmen 7,8 besteht. Beide Auslegerarme 7,8 weisen an ihrem Ende ein Querloch 9 auf. Die Distanz der beiden Mündungsebenen jedes Querlochs 9 entspricht dem Abstand zwischen den beiden Seitenwänden 6. Zur Befestigung des Kupplungsteils 5 am Ausleger 2 werden Bolzen durch die Löcher in den Seitenwänden 6 und die Querlöcher 9 geschoben und in der eingeschobenen Lage gegen herausfallen gesichert. Werden die Auslegerarme 7 und 8 relativ zueinander verschoben, so wird das Kupp­lungsteil 5 entsprechend um die Bolzenachsen geschwenkt. Diese Schwenkbewegung bewirkt die Grab- und Ausleerbewe­gung des angekuppelten Baggerlöffels. Das Kupplungsteil 5 ist auf seiner Unterseiten kastenförmig ausgebildet, wo­bei das Innere des so gebildeten Kastens zur Aufnahme der Elemente zum kraftschlüssigen Kuppeln mit dem unteren Kupplungsteil 4 dient. Die Seitenwände 10 dieses Kastens weisen Oeffnungen 11 auf.Figure 1 shows the coupling 1 in the uncoupled state, attached to a boom 2 and bucket 3 of an excavator. The clutch 1 consists of two clutch parts. The lower coupling part 4 is firmly attached to the excavator bucket 3, while the upper coupling part 5 is firmly connected to the boom 2. However, this connection is articulated in that the coupling part 5 has two side walls 6 on its upper side, which are provided with holes for receiving bolts. Are in the attached state these side walls 6 slipped over the end of the boom, which here consists of two boom arms 7, 8. Both cantilever arms 7, 8 have a transverse hole 9 at their end. The distance between the two mouth planes of each transverse hole 9 corresponds to the distance between the two side walls 6. For fastening the coupling part 5 to the bracket 2, bolts are pushed through the holes in the side walls 6 and the transverse holes 9 and secured against falling out in the inserted position. If the cantilever arms 7 and 8 are displaced relative to one another, the coupling part 5 is pivoted accordingly about the pin axes. This pivoting movement causes the digging and emptying movement of the coupled bucket. The coupling part 5 is box-shaped on its undersides, the inside of the box formed in this way serving to receive the elements for non-positive coupling with the lower coupling part 4. The side walls 10 of this box have openings 11.

Das untere Kupplungsteil 4 ist ebenfalls kastenförmig ausgebildet. Dieses Kupplungsteil 4 kann in der Weise fest mit dem Baggerlöffel 3 verbunden sein, dass es mit jenem fest verschweisst ist. An den Innenseiten dieser beiden Seitenwände 12, die gleichzeitig die Seitenwände des durch dieses Kupplungsteil 4 gebildeten Kastens sind, sind Nasen 13 angeformt, welche im rechten Winkel von diesen Innenseiten abstehen. Diese Nasen 13 weisen je eine Unterseite 14 auf, die gegen die Seitenwand 12, an welcher die betreffende Nase 13 angeformt ist, sowie da­ mit auch gegen die Bodenfläche im Inneren des Kupplungs­teils 5 leicht schräg nach abwärts verläuft. Die beiden Kupplungsteile 4 und 5 werden zum Einkuppeln beziehungs­weise zum Ankuppeln des Baggerlöffels 3 eineinanderge­schwenkt. Hierzu weist das untere Kupplungsteil 4 hinten zwischen seinen Seitenwänden 12 einen diese verbindenen Rohrabschnitt 15 auf. Die Rückseite des Kupplungsteils 5 andrerseits weist eine konkave Fläche 16 auf, welche die Innenfläche eines Hohlzylinders darstellt und deren Ra­dius dem Aussenradius des Rohrabschnittes 15 entspricht. Zum Einkuppeln bringt der Baggerführer das obere Kupp­lungsteil 5 am Ausleger mit dieser konkaven Fläche 16 auf den Rohrabschnitt 15 zu liegen. Für dieses Manöver kann er sowohl die Fläche 16 wie auch den Rohrabschnitt von der Führer-Kabine aus weitgehendst einsehen. Sobald er diese Stellung erreicht hat, schwenkt er das obere Kupp­lungsteil 5 in das untere Kupplungsteil 4 hinein. Dieses geschieht, indem der Auslegerarm 8 relativ zum Ausleger­arm 7 vorgeschoben wird. Sobald das obere Kupplungsteil 5 satt im Innern des unteren 4 liegt, wird die Kupplung verriegelt, wozu die Mittel im Innern des oberen Kupp­lungsteils 5 dienen, welche in dieser Figur nicht einseh­bar sind.The lower coupling part 4 is also box-shaped. This coupling part 4 can be firmly connected to the excavator bucket 3 in such a way that it is firmly welded to it. On the inner sides of these two side walls 12, which are also the side walls of the box formed by this coupling part 4, lugs 13 are formed, which protrude at right angles from these inner sides. These lugs 13 each have an underside 14, against the side wall 12 on which the lug 13 in question is formed, and there with also runs slightly obliquely downwards against the bottom surface inside the coupling part 5. The two coupling parts 4 and 5 are pivoted together for engaging or coupling the excavator bucket 3. For this purpose, the lower coupling part 4 has a pipe section 15 connecting it between its side walls 12. The rear of the coupling part 5, on the other hand, has a concave surface 16 which represents the inner surface of a hollow cylinder and whose radius corresponds to the outer radius of the pipe section 15. To engage, the excavator operator brings the upper coupling part 5 to lie on the boom with this concave surface 16 on the pipe section 15. For this maneuver, he can largely see both the surface 16 and the pipe section from the driver's cab. As soon as it has reached this position, it pivots the upper coupling part 5 into the lower coupling part 4. This is done by advancing the cantilever arm 8 relative to the cantilever arm 7. As soon as the upper coupling part 5 lies well inside the lower 4, the coupling is locked, for which purpose the means in the interior of the upper coupling part 5 are used, which cannot be seen in this figure.

Dieser Verriegelungsmechanismus ist in Figur 2 gezeigt, indem hier die Kupplung im ineinandergeschwenkten Zustand der beiden Kupplungsteile 4 und 5 von vorne in einem Schnitt dargestellt ist. In der hier gezeigten Situation ist die Verriegelung noch nicht erfolgt. Man erkennt die Nasen 13 an den Seitenwänden 12 sowie ihre zur Unter­seite, also zum Boden des durch das obere Kupplungsteil 5 gebildeten Kastens schräg verlaufende Unterseite 14. Im Inneren des Kupplungsteils 5 sind nun zwei Keile 17 ange­ordnet, die aus je einem Stahl-Vierkant mit teilweise keilförmigem Querschnitt bestehen. Die Keilflächen 18 weisen dieselbe Schräge auf wie die Unterseiten 14 der Nasen 13, verlaufen also parallel zu jenen. Beide Keile 17 werden gewindekraftschlüssig durchsetzt von einer ge­meinsamen Gewindestange 19. Diese Gewindestange 19 ist in den Seitenflächen 10 des oberen Kupplungsteils 5 drehbar gelagert. Hierzu können Kugellager 21 vorgesehen sein. Die Gewinde 22 und 23, welche die Gewindestange 19 auf­weist, sind zueinander gegenläufig gerichtet. Das heisst, das eine Gewinde 22 ist ein rechtsgerichtetes Gewinde und das Gewinde 23 ist ein linksgerichtetes Gewinde oder um­gekehrt. In der Mitte trägt die Gewindestange 19 einen Zahnkranz 20, der zum Antreiben der Gewindestange 19 dient, um sie also beliebig in Drehung zu versetzen. Mit­tels Drehung der Gewindestange 19 nämlich verschieben sich die Keile 17 genau gegengleich. Einerseits können sie derart unter die Nasen 13 geschoben werden, womit sie das obere Kupplungsteil 5 satt an das untere 4 pressen. Selbst wenn die Verklemmung auf den beiden Seiten nicht genau simultan geschieht, so wird dieses sofort ausgegli­chen, indem die ganze Gewindestange 19 in ihren beiden Lagern 21 leicht hin und her verschiebbar ist. Damit er­ folgt jedesmal beim Verklemmen eine automatische Selbst­zentrierung, wodurch gewährleistet ist, dass die Klemm­kraft auf beiden Seiten immer gleich gross ist. Natürlich hat dieses eine leichte Verschiebung des Zahnkranzes 20 aus der Mitte zur Folge, was aber die Funktion des Ver­klemm-Mechanismus in keiner Weise beeinträchtigt, wie das gleich eingesehen werden kann.This locking mechanism is shown in FIG. 2, in that the clutch is shown in a section from the front in the swiveled-in state of the two clutch parts 4 and 5. In the situation shown here has not yet been locked. One recognizes the lugs 13 on the side walls 12 as well as their underside which runs obliquely to the underside, that is to the bottom of the box formed by the upper coupling part 5. Inside the coupling part 5 two wedges 17 are now arranged, each made of a steel square partially wedge-shaped cross section. The wedge surfaces 18 have the same slope as the undersides 14 of the lugs 13, that is to say run parallel to those. Both wedges 17 are traversed by a common threaded rod 19. This threaded rod 19 is rotatably mounted in the side surfaces 10 of the upper coupling part 5. For this purpose, ball bearings 21 can be provided. The threads 22 and 23, which the threaded rod 19 has, are directed in opposite directions to one another. This means that a thread 22 is a right-hand thread and the thread 23 is a left-hand thread or vice versa. In the middle, the threaded rod 19 carries a ring gear 20, which serves to drive the threaded rod 19, so that it can be rotated as desired. By turning the threaded rod 19, the wedges 17 shift exactly opposite. On the one hand, they can be pushed under the lugs 13 in this way, with which they press the upper coupling part 5 firmly against the lower 4. Even if the jamming on the two sides does not occur exactly simultaneously, this is immediately compensated for by the entire threaded rod 19 being easily movable back and forth in its two bearings 21. So that he automatic self-centering follows each time it is clamped, which ensures that the clamping force is always the same on both sides. Of course, this results in a slight displacement of the ring gear 20 from the center, but this does not in any way impair the function of the clamping mechanism, as can be seen immediately.

Der Antrieb der Gewindestange 19 erfolgt ja über den Zahnkranz 20, welcher seinerseits von einer Rollenkette 24 angetrieben ist, wie dies aus Figur 3 hervorgeht, wel­che den Mechanismus in einer Draufsicht zeigt. Erkennbar sind einmal die beiden Kuppplungsteile 4,5, nämlich das untere, hier äussere 4 und das obere, hier innere 5. Ebenfalls erkennbar ist der Rohrabschnitt 15 am unteren Kupplungsteil 4, an dem das obere Kupplungsteil 5 mit seiner konkaven Fläche 16 anliegt. Die auf der Innenseite der Seitenflächen 12 angeformten Nasen 13 ragen durch die Oeffnungen 11 in den Seitenwänden 10 in das Innere des oberen Kupplungsteils 5 hinein. Die Gewindestange 19 mit den beiden gegenläufigen Gewinden 22,23 ist in den Sei­tenwänden 10 des oberen Kupplungsteils 5 gelagert. Ihre Drehung bewirkt die entsprechende Verschiebung der beiden Keile 17, entweder auseinander, wobei sie dann mit ihren abgeschrägten Keilflächen 18 unter den Nasen 13 verklemmt werden, oder gegeneinander, wodurch die Verklemmung ge­löst wird und sich schliesslich die in der Figur 3 ge­zeigte Situation einstellt, in welcher das obere Kupp­ lungsteil 5 wiederum aus dem unteren 4 herausgeschwenkt werden kann. Damit sich die Keile 17 während ihrer Ver­schiebung nicht seitlich verkanten können, sind sie we­nigstens auf ihrer einen Seite von einer Anschlagsleiste 26 geführt, die durch ein einfaches Doppelwinkel-Profil gebildet ist, das im Inneren des oberen Kupplungsteils 5 an dessen Bodenfläche angeschweisst ist. Der Antrieb der Gewindestange 19 erfolgt über den Zahnkranz 20, um den eine Rollenkette 24 gelegt ist, die ihrerseits von der Abtriebsachse eines Hydrostaten 25 angetrieben wird.The threaded rod 19 is driven via the toothed ring 20, which in turn is driven by a roller chain 24, as can be seen from FIG. 3, which shows the mechanism in a top view. One can see the two coupling parts 4, 5, namely the lower, here outer 4 and the upper, here inner 5. The pipe section 15 on the lower coupling part 4, against which the upper coupling part 5 with its concave surface 16 lies, is also recognizable. The lugs 13 formed on the inside of the side surfaces 12 protrude through the openings 11 in the side walls 10 into the interior of the upper coupling part 5. The threaded rod 19 with the two opposing threads 22, 23 is mounted in the side walls 10 of the upper coupling part 5. Their rotation causes the corresponding displacement of the two wedges 17, either apart, whereby they are then jammed with their beveled wedge surfaces 18 under the lugs 13, or against each other, whereby the jamming is released and finally the situation shown in FIG. 3 is established in which is the upper dome lung part 5 can in turn be pivoted out of the lower 4. So that the wedges 17 cannot tilt laterally during their displacement, they are guided at least on one side by a stop bar 26, which is formed by a simple double-angle profile which is welded to the bottom surface of the upper coupling part 5 inside. The threaded rod 19 is driven via the ring gear 20, around which a roller chain 24 is placed, which in turn is driven by the output shaft of a hydrostatic unit 25.

Figur 4 zeigt das gleiche wie Figur 3, jedoch in einem Schnitt von der Seite her gesehen. Erkennbar sind wie­derum das obere 5 und das untere Kupplungsteil 4, sowie die Nasen 13 am unteren und die Oeffnungen 11 am oberen Kupplungsteil 5, sowie die Keile 17 nebst deren Antriebs­mittel, nämlich der Gewindestange 19, der Rollenkette 24 und dem Hydrostaten 25. Auch die Anschlagsleiste 26, ent­lang welcher die Keile 17 geführt sind, ist sichtbar. Ausserdem ist in dieser Figur der Rohrabschnitt 15 am un­teren Kupplungsteil 4 ersichtlich sowie die konkave Flä­che 16 am oberen Kupplungsteil 5, die am Rohrabschnitt 15 anliegt. Die Schwenkung des oberen Kupplungsteiles 5 ge­genüber dem unteren 4 erfolgt daher um die Achse des Rohrabschnittes 15.Figure 4 shows the same as Figure 3, but seen in a section from the side. The upper 5 and the lower coupling part 4, as well as the lugs 13 on the lower and the openings 11 on the upper coupling part 5, as well as the wedges 17 and their drive means, namely the threaded rod 19, the roller chain 24 and the hydrostatic unit 25, can again be seen Stop bar 26, along which the wedges 17 are guided, is visible. In addition, the pipe section 15 on the lower coupling part 4 and the concave surface 16 on the upper coupling part 5, which abuts the pipe section 15, can be seen in this figure. The pivoting of the upper coupling part 5 relative to the lower 4 therefore takes place about the axis of the pipe section 15.

Anstelle eines Antriebes mit einer Rollenkette kann die­ser auch über einen Zahnriemen erfolgen, wofür dann die Gewindestange entsprechend mit einem Zahnriemenrad ausge­rüstet ist.Instead of a drive with a roller chain, this can also be done via a toothed belt, for which the Threaded rod is equipped accordingly with a toothed belt wheel.

Um die Stabilität der Kupplung in bezug auf seitliche Verschiebungen zu steigern, können sowohl die Seitenflä­chen 12 des unteren Kupplungsteils 4 wie auch die Seiten­flächen 10 des oberen Kupplungsteils 5 zueinander leicht konisch verlaufen. Wird dann das obere Kupplungsteil 5 in das untere hineingesteckt oder hineingeschwenkt, so wird es im unteren Kupplungsteil 4 zusätzlich seitlich ver­klemmt. Die Abschlusswand gegenüber dem Rohrabschnitt 15 beziehungsweise der konischen Fläche 16 sowohl des unte­ren 4 wie auch oberen Kupplungsteils 5 kann ausserdem nach oben hin leicht mit wachsendem Radius gegen innen geschwungen verlaufen. Damit wird zusätzlich auch in Richtung senkrecht zum Rohrabschnitt 15 eine Verklemmung bewirkt, wenn das obere Kupplungsteil 5 in das untere 4 geschwenkt wird.In order to increase the stability of the coupling with respect to lateral displacements, both the side surfaces 12 of the lower coupling part 4 and the side surfaces 10 of the upper coupling part 5 can be slightly conical to one another. If the upper coupling part 5 is then inserted or pivoted into the lower coupling part, it is additionally clamped laterally in the lower coupling part 4. The end wall opposite the pipe section 15 or the conical surface 16 of both the lower 4 and the upper coupling part 5 can also run slightly upward with increasing radius towards the inside. This also causes jamming in the direction perpendicular to the pipe section 15 when the upper coupling part 5 is pivoted into the lower 4.

Der erfindungsgemässe Antriebsmechanismus bringt bedeu­tende Vorteile gegenüber den herkömmlichen. Die Vorteile eines hydraulischen Antriebs wurden hier mit denen eines mechanischen gekoppelt. Bei den bekannten hydraulischen Verriegelungsmechanismen fehlte nämlich eine wirksame Selbsthemmung. Wird die hydraulische Zylinder-Kolben-Ein­heit leck, so kann sich die Verriegelung lockern und der Bagger kann schlimmstensfalls seinen Löffel verlieren. Dem ist hier dadurch Abhilfe geschafft worden, dass für den Antrieb ein Hydrostat 25 eingesetzt wird, der seiner­seits eine Gewindestange 19 antreibt, welche eine natür­liche Selbsthemmung aufweist, sodass sich auch bei stärk­ster Beanspruchung des Baggerlöffels und entsprechenden Vibrationen und Schlägen auf die Kupplung 1 diese nicht zu lösen vermag. Der Hydrostat 25 braucht, sobald die Verriegelung vorgenommen wurde und die Keile 17 verklemmt sind, nicht mehr mit Hydrodruck beaufschlagt zu werden. Im Gegensatz also zu einer Zylinder-Kolben-Einheit steht er nicht ständig unter Druck, sondern nur dann, wenn der Verriegelungsmechanismus tatsächlich betätigt wird. Ein Hydrostat kann ausserdem sehr robust gebaut werden, so­dass er gegenüber der Alternative eines Elektromotors im Betrieb um ein Vielfaches zuverlässiger und dauerhafter ist. Zudem weisen viele Bagger zusätzliche Hydrualikan­schlüsse bereits auf, von welchen aus die Versorgung des Hydrostaten 25 mit Hydrodruck-Flüssigkeit sichergestellt werden kann, ohne dass grosse bauliche Veränderungen am Bagger selbst vorzunehmen wären.The drive mechanism according to the invention brings significant advantages over the conventional ones. The advantages of a hydraulic drive were combined with those of a mechanical one. The known hydraulic locking mechanisms lacked effective self-locking. If the hydraulic cylinder-piston unit leaks, the lock can loosen and, in the worst case, the excavator can lose its bucket. This has been remedied by the fact that for a hydrostatic drive 25 is used in the drive, which in turn drives a threaded rod 19 which has a natural self-locking feature, so that even with the heaviest stress on the excavator spoon and corresponding vibrations and impacts on the clutch 1, the latter cannot be released. As soon as the locking has been carried out and the wedges 17 are jammed, the hydrostat 25 no longer needs to be subjected to hydraulic pressure. In contrast to a cylinder-piston unit, it is not constantly under pressure, but only when the locking mechanism is actually actuated. A hydrostat can also be built very robustly, so that it is many times more reliable and durable compared to the alternative of an electric motor. In addition, many excavators already have additional hydraulic connections, from which the supply of hydrostat 25 with hydraulic pressure fluid can be ensured without major structural changes to the excavator itself.

Die erfindungsgemässe Kupplung 1 kann deshalb in einfach­ster Weise vom Baggerführer aus seiner Kabine heraus be­tätigt werden. Ihr einfacher Aufbau, welcher das Ineinan­derschwenken der beiden Kupplungsteile 4,5 erlaubt, er­möglicht das An- und Abkuppeln von Baggerlöffeln ohne ma­nuelle Handgriffe an der Kupplung selbst, sodass ein Aus­steigen des Baggerführers oder der Zuzug von Hilfskräften nicht mehr erforderlich ist. Damit aber lassen sich wert­ volle Maschinenstunden einsparen und zudem wird ein An­reiz geschaffen, vermehrt mit dem jeweils optimalen Bag­gerlöffel zu arbeiten. Natürlich funktioniert die Kupp­lung auch für weitere Werkzeuge anstelle von Baggerlöf­feln, so zum Beispiel für Abbruchhämmer und dergleichen.The clutch 1 according to the invention can therefore be actuated in the simplest manner by the excavator operator from his cabin. Their simple design, which allows the two coupling parts 4, 5 to pivot into one another, enables excavator buckets to be coupled and uncoupled without manual manipulations on the coupling itself, so that it is no longer necessary for the excavator operator to get out of the vehicle or to call in auxiliary personnel. But that can be worth it Save full machine hours and also create an incentive to work increasingly with the optimal excavator bucket. Of course, the coupling also works for other tools instead of excavator buckets, for example for demolition hammers and the like.

Claims (8)

1.) Kupplung (1) zum Kuppeln eines Baggerlöffels (3) an den Ausleger (2) eines Baggers, die aus einem unte­ren, kastenförmigen Kupplungsteil (4), der fest am Baggerlöffel (3) angebaut ist, und einem oberen ka­stenförmigen Kupplungsteil (5) besteht, der satt in den unteren hineinsteckbar oder hineinschwenkbar ist, wobei an den Innenseiten des unteren Kupplungs­teils (4) mindestens je eine Nase (13) angeformt ist, welche Nasen (13) im gekuppelten Zustand der beiden Kupplungsteile (4,5) durch Oeffnungen (11) in den Seitenwänden (10) des oberen Kupplungsteiles (5) in dessen Inneres ragen und unter die je ein Keil (17) schiebbar ist, dadurch gekennzeichnet, dass eine einzige Gewindestange (19) mit zwei gegenläufi­gen Gewinden (22,23) die beiden Keile (17) gewinde­kraftschlüssig durchsetzt, und dass die Gewin­destange (19) mittels eines im Innern des oberen Kupplungsteiles (5) angeordneten Hydrostaten (25) antreibbar ist.1.) Coupling (1) for coupling an excavator bucket (3) to the boom (2) of an excavator, which consists of a lower, box-shaped coupling part (4), which is firmly attached to the excavator bucket (3), and an upper box-shaped coupling part ( 5), which can be snugly inserted or pivoted into the lower one, at least one nose (13) being formed on the inner sides of the lower coupling part (4), which lugs (13) in the coupled state of the two coupling parts (4, 5) through openings (11) in the side walls (10) of the upper coupling part (5) project into the interior thereof and under each of which a wedge (17) can be pushed, characterized in that a single threaded rod (19) with two opposing threads (22, 23) passes through the two wedges (17) in a thread-locking manner, and that the threaded rod (19) can be driven by means of a hydrostat (25) arranged in the interior of the upper coupling part (5). 2.) Kupplung nach Anspruch 1, dadurch gekennzeichnet, dass die Gewindestange (19) einen Zahnkranz (20) trägt, der mit der Abtriebsachse des Hydrostaten (25) über eine Rollenkette (24) verbunden ist.2.) Coupling according to claim 1, characterized in that the threaded rod (19) carries a ring gear (20) which is connected to the output axis of the hydrostat (25) via a roller chain (24). 3.) Kupplung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Nasen (13) an den Innenseiten der Seitenflächen (12) des unteren Kupp­lungsteils (4) angeformt sind.3.) Coupling according to one of the preceding claims, characterized in that the lugs (13) on the inner sides of the side surfaces (12) of the lower coupling part (4) are integrally formed. 4.) Kupplung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Keile (17) seit­wärts in Richtung gegen die Seitenflächen (10,12) der Kupplungsteile (4,5) hin hin- und herbewegbar sind.4.) Coupling according to one of the preceding claims, characterized in that the wedges (17) can be moved back and forth sideways in the direction against the side surfaces (10, 12) of the coupling parts (4, 5). 5.) Kupplung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Keile (17) längs ihrer Bewegungsrichtung mindestens auf einer Seite mittels einer Anschlagleiste (26) geführt sind.5.) Coupling according to one of the preceding claims, characterized in that the wedges (17) are guided along their direction of movement at least on one side by means of a stop bar (26). 6.) Kupplung nach einem der Ansprüche 1 oder 3 bis 5, dadurch gekennzeichnet, dass die Gewindestange (19) ein Zahnriemenrad trägt, das mit der Abtriebsachse des Hydrostaten (25) über einen Zahnriemen verbunden ist.6.) Coupling according to one of claims 1 or 3 to 5, characterized in that the threaded rod (19) carries a toothed belt wheel which is connected to the output axis of the hydrostat (25) via a toothed belt. 7.) Kupplung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Seitenwände (10,12) der beiden Kupplungsteile (5,4) je zueinander leicht konisch sind.7.) Coupling according to one of the preceding claims, characterized in that the side walls (10, 12) of the two coupling parts (5, 4) are each slightly conical to one another. 8.) Kupplung nach einem der vorhergehendne Ansprüche, dadurch gekennzeichnet, dass die Abschlusswand (27) am unteren Kupplungsteil (4) gegenüber dem Rohrab­schnitt und jene (28) am oberen (5) gegenüber der konischen Fläche (16) nach oben hin leicht mit wach­sendem Radius gegen innen geschwungen verläuft.8.) Coupling according to one of the preceding claims, characterized in that the end wall (27) on the lower coupling part (4) opposite the pipe section and that (28) on the upper (5) relative to the conical surface (16) slightly upwards growing radius curving towards the inside.
EP90810171A 1989-04-12 1990-03-06 Coupling for an excavator bucket Expired - Lifetime EP0392972B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90810171T ATE94930T1 (en) 1989-04-12 1990-03-06 COUPLING FOR EXCAVATOR BUCKET.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1376/89A CH680007A5 (en) 1989-04-12 1989-04-12
CH1376/89 1989-04-12

Publications (3)

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EP0392972A2 true EP0392972A2 (en) 1990-10-17
EP0392972A3 EP0392972A3 (en) 1991-07-03
EP0392972B1 EP0392972B1 (en) 1993-09-22

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EP90810171A Expired - Lifetime EP0392972B1 (en) 1989-04-12 1990-03-06 Coupling for an excavator bucket

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EP (1) EP0392972B1 (en)
AT (1) ATE94930T1 (en)
CH (1) CH680007A5 (en)
DE (1) DE59002794D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9315868U1 (en) * 1993-10-18 1995-02-16 Liebherr Hydraulikbagger clutch
WO1997028314A1 (en) * 1996-02-02 1997-08-07 Nagler Juergen Tool-exchanging device for hydraulic excavators
EP1353011A1 (en) * 2002-03-27 2003-10-15 Rädlinger Maschinen- und Anlagenbau GmbH Device for coupling a working implement to a construction machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB928103A (en) * 1961-04-18 1963-06-06 Priestman Brothers Improvements relating to trench excavators
EP0143074A1 (en) * 1983-09-15 1985-05-29 Fredi Stury AG Excavator
GB2208220A (en) * 1987-07-20 1989-03-15 Fritiof Hulden Quick-coupling device, e.g. for excavator bucket

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB928103A (en) * 1961-04-18 1963-06-06 Priestman Brothers Improvements relating to trench excavators
EP0143074A1 (en) * 1983-09-15 1985-05-29 Fredi Stury AG Excavator
GB2208220A (en) * 1987-07-20 1989-03-15 Fritiof Hulden Quick-coupling device, e.g. for excavator bucket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9315868U1 (en) * 1993-10-18 1995-02-16 Liebherr Hydraulikbagger clutch
WO1997028314A1 (en) * 1996-02-02 1997-08-07 Nagler Juergen Tool-exchanging device for hydraulic excavators
EP1353011A1 (en) * 2002-03-27 2003-10-15 Rädlinger Maschinen- und Anlagenbau GmbH Device for coupling a working implement to a construction machine

Also Published As

Publication number Publication date
EP0392972A3 (en) 1991-07-03
ATE94930T1 (en) 1993-10-15
DE59002794D1 (en) 1993-10-28
CH680007A5 (en) 1992-05-29
EP0392972B1 (en) 1993-09-22

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