EP0294843A1 - Excavator - Google Patents

Excavator Download PDF

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Publication number
EP0294843A1
EP0294843A1 EP88109305A EP88109305A EP0294843A1 EP 0294843 A1 EP0294843 A1 EP 0294843A1 EP 88109305 A EP88109305 A EP 88109305A EP 88109305 A EP88109305 A EP 88109305A EP 0294843 A1 EP0294843 A1 EP 0294843A1
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EP
European Patent Office
Prior art keywords
boom
excavator
advance
arm
basic boom
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Granted
Application number
EP88109305A
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German (de)
French (fr)
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EP0294843B1 (en
Inventor
Erich Sennebogen
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Individual
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Individual
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Priority to AT88109305T priority Critical patent/ATE66986T1/en
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    • 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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/301—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom with more than two arms (boom included), e.g. two-part boom with additional dipper-arm
    • 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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/307—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom the boom and the dipper-arm being connected so as to permit relative movement in more than one plane
    • 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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes

Definitions

  • the invention relates to an excavator according to the preamble of claim 1.
  • a swivel joint with a pivot axis that is vertical in a working position of the basic boom is arranged between the basic boom and the advance arm, a hydraulic drive for the advance arm being supported at a position of the swivel joint on the advance arm side.
  • the feeder is manually rotatable in both directions about the pivot bearing and lockable in any position achieved.
  • a control lever for the basic boom can be switched to the control function for the hydraulic drive of the advance boom. This enables sensible control of the forward boom in the blocked position of the basic boom.
  • the vertical orientation of the swivel axis is adjustable relative to the basic boom, the flexibility of the excavator according to the invention increases considerably since the position of the basic boom can also be changed and a vertical position of the swivel axis can nevertheless be achieved.
  • an excavator 2 has a chassis 4 and a superstructure 6 consisting of a driver's cab 8 and a motor housing 10 in a known manner.
  • a basic boom 12 which can be swiveled up and down and which has a swivel joint 14 at its free end.
  • the swivel joint 14 has a swivel axis 16 which, in a defined working position of the basic boom 12 according to FIG. 1, runs perpendicular to the standing surface of the excavator 2.
  • the swivel joint 14 consists of a frame part 18, which is provided on the side of the basic boom 12, and of a frame part 20, which is rotatably connected to the frame part 18, and on which a forward extension arm 24 is pivotally guided via a swivel joint 22.
  • a cantilever arm 26 is pivotally mounted, which can be moved via a hydraulic drive 28 and carries a support lever 30 at its free end for actuating an excavator bucket 32.
  • FIG. 1 The vertical range of movement of the excavator bucket 32 with the pivot axis 16 standing vertically is shown schematically in FIG. 1.
  • a hydraulic device 34 is used to drive the advance arm 24, which is supported at one end by the advance arm 24 and at the other end by the frame part 20.
  • the excavator 2 In a neutral position of the swivel joint 14, ie in a position in which the longitudinal axes of the basic boom 12 and the forward boom 24 are aligned, the excavator 2 can be operated as a normal backhoe, the basic boom 12 not being shown in the drawing Hydraulic drives, the advance arm 24 are operated via the hydraulic drive 34 and the extension arm 26 via the hydraulic drive 28.
  • the swivel joint 14 is brought from its neutral position into a pivoted position, as shown in FIG. 2.
  • the forward boom 24 is pivoted relative to the basic boom 12 about the swivel joint 14.
  • the pivoting of the advance boom 24 relative to the basic boom 12 can be carried out either by hand or by hydraulic drives 36 shown in FIG. 2.
  • the base boom 12 is brought into a position according to FIG. 1, in which the pivot axis 16 of the pivot joint 14 is perpendicular to the standing surface of the excavator 2.
  • the excavator 2 according to the invention is not only for through management of normal excavation work and vertical dredging work parallel to his lane, because a variety of working positions can be achieved due to the relative adjustability of the advance boom 24 to the basic boom 12.
  • forward boom 24 can assume any other intermediate position apart from the relative position to the basic boom 12 according to FIG. 2.
  • the swivel joint 14 should be blocked when the desired relative position of the advance boom 24 to the basic boom 12 has been reached.
  • control element such as. B. a control lever for the basic boom on the hydraulic drive 34 for the advance 24 to switch.
  • control and movement of the forward boom, which then carries out the lifting work, is thus made easier when the basic boom is blocked.

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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)
  • Operation Control Of Excavators (AREA)
  • Jib Cranes (AREA)

Abstract

An excavator (2) has a main boom (12) as well as a front boom (24) and an extension arm (26) with a bucket (32) fastened thereto. Arranged between the main boom (12) and the front boom (24) is a pivot joint (14) which has a perpendicular pivoting axis (16) at a defined working position of the main boom (12). The front boom (24) can be pivoted relative to the main boom (12) by the pivot joint (14) so that trenching work parallel to the longitudinal axis of the excavator (2) is also possible outside the track width of the excavator (2).

Description

Die Erfindung betrifft einen Bagger nach dem Oberbegriff des Anspruches 1.The invention relates to an excavator according to the preamble of claim 1.

Um entlang von Mauern oder parallel neben einer Fahrspur Baggerarbeiten durchführen zu können, wurden bislang Spezialgeräte verwendet, bei denen der Ausleger des Bag­gers gegenüber dem Oberwagen, bestehend aus Fahrerkanzel und Motorgehäuse, um eine senkrechte Achse schwenkbar ist. Bei größeren Baggern ist die Verschwenkung des Auslegers nicht sinnvoll anzuwenden. So wurde bisher bei größeren Baggern der sogenannte Vorderausleger um eine senkrechte Achse verschwenkt und arretiert. Mit einer darauffolgenden Verschwenkung des Oberwagens kann so eine ungefähre Annäherung an Mauern oder dgl. erreicht werden. Da jedoch auch bei dieser Ausführungsform dem Grundausleger die Hubarbeit obliegt, wird selbst bei Schrägstellung des Oberwagens eine senkrechte Grabarbeit parallel an Mauern oder neben Fahrspuren nur bedingt er­ möglicht.In order to be able to carry out excavation work along walls or parallel to a lane, special equipment has been used so far in which the boom of the excavator can be pivoted about a vertical axis relative to the superstructure, consisting of the driver's cab and the motor housing. The pivoting of the boom is not useful for larger excavators. In the case of larger excavators, the so-called front boom has been pivoted and locked around a vertical axis. With a subsequent swiveling of the superstructure, an approximate approach to walls or the like can be achieved. However, since lifting work is also the responsibility of the basic boom in this embodiment, vertical digging work parallel to walls or next to lanes is only partially possible even when the superstructure is inclined possible.

Es sind kleinere Spezialgeräte, sogenannte Grabenbagger, bekannt, mittels denen eng an Hindernissen senkrecht ge­graben werden kann. Derartige Spezialgeräte können jedoch fast ausschließlich nur für derartige Sonderaufgaben ein­gesetzt werden, für normale Baggerarbeiten sind sie nicht geeignet. Somit ist es für kleinere Bauunternehmen, die sich keinen großen Fuhrpark leisten können oder wollen, unrentabel, sich zusätzlich zu einem normalen Löffelbag­ger auch noch eine Spezialmaschine anzuschaffen.Smaller special devices, so-called trench excavators, are known, by means of which digging can be carried out vertically close to obstacles. However, such special devices can be used almost exclusively for such special tasks, they are not suitable for normal excavation work. It is therefore unprofitable for smaller construction companies that cannot or do not want to afford a large fleet of vehicles to purchase a special machine in addition to a normal backhoe.

Es ist daher Aufgabe der vorliegenden Erfindung, einen Bagger nach dem Oberbegriff des Anspruches 1 derart aus­zubilden, daß Spezialaufgaben, wie das parallele Graben dicht an Mauern oder neben einer Fahrspur problemlos zu bewerkstelligen sind, der Bagger jedoch weiterhin auch für normalen Baggerbetrieb einsetzbar ist.It is therefore an object of the present invention to design an excavator according to the preamble of claim 1 in such a way that special tasks such as parallel digging close to walls or next to a lane can be carried out without problems, but the excavator can still be used for normal excavator operation.

Die Lösung dieser Aufgabe erfolgt durch die kennzeichnen­den Merkmale des Anspruches 1.This object is achieved by the characterizing features of claim 1.

Erfindungsgemäß ist zwischen dem Grundausleger und dem Vorausleger ein Drehgelenk mit einer in einer Arbeits­stellung des Grundauslegers senkrechten Schwenkachse an­geordnet, wobei ein Hydraulikantrieb für den Vorausleger sich an einer vorauslegerseitigen Stelle des Schwenkge­lenkes abstützt.According to the invention, a swivel joint with a pivot axis that is vertical in a working position of the basic boom is arranged between the basic boom and the advance arm, a hydraulic drive for the advance arm being supported at a position of the swivel joint on the advance arm side.

Hierdurch ist es durch Schrägstellung des Oberwagens mög­lich, senkrechte Baggerarbeiten parallel zur Spur des Baggerfahrwerkes auszuführen, als auch entlang von Mauern oder dgl. oder parallel zu einer Fahrspur, auf der der Bagger steht.As a result, by tilting the superstructure, it is possible to carry out vertical excavation work parallel to the track of the excavator undercarriage, as well as along walls or the like. Or parallel to a lane on which the excavator is standing.

Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous developments of the invention result from the subclaims.

Gemäß Anspruch 2 ist der Vorausleger manuell in beide Richtungen um das Schwenklager drehbar und in jeder er­zielten Stellung verriegelbar. Hieraus ergibt sich bei einfachem und robustem Aufbau der Vorteil einer größtmög­lichen Flexibilität in der Anwendung.According to claim 2, the feeder is manually rotatable in both directions about the pivot bearing and lockable in any position achieved. With a simple and robust construction, this results in the advantage of the greatest possible flexibility in use.

Erfolgt gemäß Anspruch 3 die Schwenkung des Vorauslegers um das Schwenklager kraftbetrieben, wobei der Kraftan­trieb in jeder erreichten Stellung des Vorauslegers blockierbar ist, ergibt sich der Vorteil, daß während des Betriebs die Stellung des Vorauslegers über den Kraftan­trieb nachjustierbar ist.If, according to claim 3, the pivoting of the advance arm about the pivot bearing is power-operated, the power drive being lockable in every position of the advance arm reached, the advantage results that the position of the advance arm can be readjusted via the power drive during operation.

Gemäß Anspruch 4 ist ein Steuerhebel für den Grundausle­ger auf die Steuerfunktion für den Hydraulikantrieb des Vorauslegers umschaltbar. Hierdurch wird eine sinnvolle Steuerung des Vorauslegers in der blockierten Stellung des Grundauslegers möglich.According to claim 4, a control lever for the basic boom can be switched to the control function for the hydraulic drive of the advance boom. This enables sensible control of the forward boom in the blocked position of the basic boom.

Ist gemäß Anspruch 5 die vertikale Ausrichtung der Schwenkachse relativ zum Grundausleger verstellbar, er­höht sich die Flexibilität des erfindungsgemäßen Baggers erheblich, da auch die Stellung des Grundauslegers ver­änderbar ist und dennoch eine senkrechte Stellung der Schwenkachse erzielbar ist.If, according to claim 5, the vertical orientation of the swivel axis is adjustable relative to the basic boom, the flexibility of the excavator according to the invention increases considerably since the position of the basic boom can also be changed and a vertical position of the swivel axis can nevertheless be achieved.

Weitere Einzelheiten, Merkmale und Vorteile der vorlie­genden Erfindung ergeben sich aus der nachfolgenden Be­schreibung unter Bezugnahme auf die Zeichnung.Further details, features and advantages of the present invention will become apparent from the following description with reference to the drawing.

Es zeigt:

  • Fig. 1 schematisch vereinfacht eine Seitenansicht eines erfindungsgemäßen Baggers; und
  • Fig. 2 schematisch vereinfacht eine Draufsicht von oben auf den erfindungsgemäßen Bagger.
It shows:
  • Fig. 1 schematically simplified a side view of an excavator according to the invention; and
  • Fig. 2 schematically simplified a top view of the excavator according to the invention.

Gemäß den Fig. 1 und 2 weist ein erfindungsgemäßer Bagger 2 in bekannter Weise ein Fahrwerk 4 und einen Oberwagen 6 bestehend aus einer Fahrerkanzel 8 und einem Motorgehäuse 10 auf. Im Bereich der Fahrerkanzel 8 ist ein schwenkbe­weglich auf- und abbewegbarer Grundausleger 12 vorgese­hen, der an seinem freien Ende ein Schwenkgelenk 14 auf­weist. Das Schwenkgelenk 14 weist eine Schwenkachse 16 auf, welche in einer definierten Arbeitsstellung des Grundauslegers 12 gemäß Fig. 1 senkrecht zur Standfläche des Baggers 2 verläuft.1 and 2, an excavator 2 according to the invention has a chassis 4 and a superstructure 6 consisting of a driver's cab 8 and a motor housing 10 in a known manner. In the area of the driver's cabin 8 there is a basic boom 12 which can be swiveled up and down and which has a swivel joint 14 at its free end. The swivel joint 14 has a swivel axis 16 which, in a defined working position of the basic boom 12 according to FIG. 1, runs perpendicular to the standing surface of the excavator 2.

Das Schwenkgelenk 14 besteht aus einem Rahmenteil 18, welches auf der Seite des Grundauslegers 12 vorgesehen ist, sowie aus einem Rahmenteil 20, welches drehbeweglich mit dem Rahmenteil 18 verbunden ist, und an dem über ein Schwenkgelenk 22 ein Vorausleger 24 schwenkbeweglich ge­führt ist. Am freien Ende des Vorauslegers 24 ist ein Auslegerarm 26 schwenkbeweglich gelagert, der über einen Hydraulikantrieb 28 bewegbar ist und an seinem freien Ende einen Stützhebel 30 zur Betätigung eines Baggerlöf­fels 32 trägt.The swivel joint 14 consists of a frame part 18, which is provided on the side of the basic boom 12, and of a frame part 20, which is rotatably connected to the frame part 18, and on which a forward extension arm 24 is pivotally guided via a swivel joint 22. At the free end of the advance arm 24, a cantilever arm 26 is pivotally mounted, which can be moved via a hydraulic drive 28 and carries a support lever 30 at its free end for actuating an excavator bucket 32.

Der vertikale Bewegungsbereich des Baggerlöffels 32 bei senkrecht stehender Schwenkachse 16 ist in Fig. 1 sche­matisch dargestellt.The vertical range of movement of the excavator bucket 32 with the pivot axis 16 standing vertically is shown schematically in FIG. 1.

Wie aus Fig. 1 hervorgeht, dient zum Antrieb des Voraus­legers 24 eine Hydraulikvorrichtung 34, welche sich mit einem ihrer Enden an dem Vorausleger 24 abstützt und sich mit ihrem anderen Ende an dem Rahmenteil 20 abstützt.As can be seen from FIG. 1, a hydraulic device 34 is used to drive the advance arm 24, which is supported at one end by the advance arm 24 and at the other end by the frame part 20.

In einer Neutrallage des Schwenkgelenks 14, d. h., in einer Lage, in der die Längsachsen des Grundauslegers 12 und des Vorauslegers 24 fluchten, kann der Bagger 2 als normaler Löffelbagger betrieben werden, wobei der Grund­ausleger 12 über in der Zeichnung nicht dargestellte Hydraulikantriebe, der Vorausleger 24 über den Hydraulik­antrieb 34 und der Auslegerarm 26 über den Hydraulikan­trieb 28 betrieben werden.In a neutral position of the swivel joint 14, ie in a position in which the longitudinal axes of the basic boom 12 and the forward boom 24 are aligned, the excavator 2 can be operated as a normal backhoe, the basic boom 12 not being shown in the drawing Hydraulic drives, the advance arm 24 are operated via the hydraulic drive 34 and the extension arm 26 via the hydraulic drive 28.

Sollen mit dem Bagger 2 Baggerarbeiten parallel zu und nahe an einer Mauer oder dgl. oder parallel zu einer Fahrspur durchgeführt werden, wird das Schwenkgelenk 14 aus seiner Neutrallage in eine verschwenkte Lage ge­bracht, wie in Fig. 2 dargestellt. In dieser verschwenk­ten Lage ist der Vorausleger 24 relativ zu dem Grundaus­leger 12 um das Schwenkgelenk 14 herum verschwenkt. Die Verschwenkung des Vorauslegers 24 relativ zu dem Grund­ausleger 12 kann hierbei entweder von Hand oder durch in Fig. 2 dargestellte Hydraulikantriebe 36 erfolgen. Vor Verschwenkung des Vorauslegers 24 relativ zu dem Grund­ausleger 12 wird der Grundausleger 12 in eine Stellung gemäß Fig. 1 gebracht, in der die Schwenkachse 16 des Schwenkgelenks 14 senkrecht zur Standfläche des Baggers 2 steht. In dieser definierten Arbeitsstellung des Grund­auslegers 12 wird der Antrieb des Grundauslegers 12 blockiert, so daß der Grundausleger 12 in der in Fig. 1 dargestellten definierten Lage verbleibt. Wird dann nach Verschwenken des Vorauslegers relativ zu dem Grundausle­ger der Oberwagen 6 in die Stellung gemäß Fig. 2 ge­bracht, lassen sich problemlos Grabarbeiten parallel zur Längsachse des Baggers 2 auch außerhalb der Spurbreite des Fahrwerks 4 durchführen, wie aus Fig. 2 eindeutig hervorgeht.If excavator work is to be carried out with the excavator 2 parallel to and close to a wall or the like or parallel to a lane, the swivel joint 14 is brought from its neutral position into a pivoted position, as shown in FIG. 2. In this pivoted position, the forward boom 24 is pivoted relative to the basic boom 12 about the swivel joint 14. The pivoting of the advance boom 24 relative to the basic boom 12 can be carried out either by hand or by hydraulic drives 36 shown in FIG. 2. Before the advance boom 24 is pivoted relative to the base boom 12, the base boom 12 is brought into a position according to FIG. 1, in which the pivot axis 16 of the pivot joint 14 is perpendicular to the standing surface of the excavator 2. In this defined working position of the basic boom 12, the drive of the basic boom 12 is blocked, so that the basic boom 12 remains in the defined position shown in FIG. 1. If the superstructure 6 is then brought into the position according to FIG. 2 after pivoting the advance boom relative to the basic boom, digging work parallel to the longitudinal axis of the excavator 2 can also be carried out without problems outside of the track width of the running gear 4, as is clearly shown in FIG. 2.

Da der Antrieb des Grundauslegers 12 blockiert ist, übernimmt der Hydraulikantrieb 34 des Vorauslegers 24 die Hubarbeit, so daß die Achse des Schwenkgelenkes 22, um die der Vorausleger 24 relativ zu dem Rahmenteil 20 dreht im wesentlichen stets horizontal bleibt und problemlos senkrechte Grabarbeiten durchgeführt werden können.Since the drive of the basic boom 12 is blocked, the hydraulic drive 34 of the advance boom 24 takes over the lifting work, so that the axis of the swivel joint 22 about which the advance boom 24 rotates relative to the frame part 20 remains essentially horizontal and vertical digging work can be carried out without problems .

Der erfindungsgemäße Bagger 2 ist nicht nur zur Durch­ führung normaler Baggerarbeiten und senkrechter Bagger­arbeiten parallel zu seiner Fahrspur geeignet, da sich aufgrund der relativen Verstellbarkeit des Vorauslegers 24 zum Grundausleger 12 eine Vielzahl von Arbeitsstel­lungen erzielen lassen.The excavator 2 according to the invention is not only for through management of normal excavation work and vertical dredging work parallel to his lane, because a variety of working positions can be achieved due to the relative adjustability of the advance boom 24 to the basic boom 12.

Es versteht sich, daß der Vorausleger 24 außer der Rela­tivstellung zu dem Grundausleger 12 gemäß Fig. 2 jede andere Zwischenlage einnehmen kann.It goes without saying that the forward boom 24 can assume any other intermediate position apart from the relative position to the basic boom 12 according to FIG. 2.

Vorteilhafterweise sollte das Schwenkgelenk 14 blockiert werden, wenn die gewünschte Relativlage des Vorauslegers 24 zum Grundausleger 12 erreicht ist.Advantageously, the swivel joint 14 should be blocked when the desired relative position of the advance boom 24 to the basic boom 12 has been reached.

Weiterhin ist es vorteilhaft, ein Steuerorgan, wie z. B. einen Steuerhebel, für den Grundausleger auf den Hydrau­likantrieb 34 für den Vorausleger 24 umschalten zu kön­nen. Für eine Bedienungsperson erleichtert sich somit bei blockiertem Grundausleger die Ansteuerung und Bewegung für den Vorausleger, der dann die Hubarbeit durchführt.It is also advantageous to have a control element, such as. B. a control lever for the basic boom on the hydraulic drive 34 for the advance 24 to switch. For an operator, control and movement of the forward boom, which then carries out the lifting work, is thus made easier when the basic boom is blocked.

Schließlich ist es auch möglich, die Vertikallage der Schwenkachse 16 relativ zu dem Grundausleger 12 verstell­bar zu machen. Bei einer geeigneten Ansteuerung ist es dann möglich, auch in der Stellung gemäß Fig. 2 den Grundausleger 12 zu bewegen, wenn hierbei die senkrechte Lage der Schwenkachse 16 nachgeregelt werden kann. Somit erhöht sich die Flexibilität des erfindungsgemäßen Bag­gers erheblich, da durch den bewegbaren Grundausleger ein größerer Aktionsradius ermöglicht ist. Weiterhin kann speziellen Anforderungen und Situationen beim Ein­satz des Baggers noch besser Rechnung getragen werden.Finally, it is also possible to make the vertical position of the pivot axis 16 adjustable relative to the basic boom 12. With a suitable control, it is then possible to move the basic boom 12 also in the position according to FIG. 2, if the vertical position of the pivot axis 16 can be readjusted. This increases the flexibility of the excavator according to the invention considerably, since the movable basic boom enables a larger radius of action. Furthermore, special requirements and situations when using the excavator can be taken into account even better.

Aufgrund der neuesten Rechtssprechung wird hiermit noch betont, daß alle vorangegangenen Ausführungen als erfin­dungswesentlich anzusehen sind.On the basis of the latest case law, it is hereby emphasized that all of the preceding statements are to be regarded as essential to the invention.

Claims (5)

1. Bagger (2) mit einem Grundausleger (12), einem daran um eine horizontale Achse schwenkbeweglich gelager­ten, hydraulisch betätigbaren Vorausleger (24), der an seinem freien Ende einen hydraulisch betätigbaren Auslegerarm (26) mit einem Baggerlöffel (32) trägt, dadurch gekennzeichnet, daß
zwischen dem Grundausleger (12) und dem Vorausleger (24) ein Schwenkgelenk (14) mit in einer Arbeits­stellung des Grundauslegers (12) senkrechten Schwenkachse (16) angeordnet ist; und
ein Hydraulikantrieb (34) für den Vorausleger (24) sich an einer vorauslegerseitigen Stelle (20) des Schwenkgelenks (14) abstützt.1. Excavator (2) with a basic boom (12), a hydraulically actuated advance arm (24) mounted on it pivotably about a horizontal axis, which carries at its free end a hydraulically actuated boom arm (26) with an excavator bucket (32) characterized in that
a swivel joint (14) with a swivel axis (16) which is vertical in a working position of the basic boom (12) is arranged between the basic boom (12) and the forward boom (24); and
a hydraulic drive (34) for the advance arm (24) is supported at a location (20) of the swivel joint (14) on the advance side. 2. Bagger nach Anspruch 1, dadurch gekennzeichnet, daß der Vorausleger (24) manuell in beide Richtungen um das Schwenkgelenk (14) drehbar und in jeder erziel­baren Relativstellung zu dem Grundausleger (12) ver­riegelbar ist.2. Excavator according to claim 1, characterized in that the advance arm (24) can be rotated manually in both directions about the swivel joint (14) and can be locked in any achievable relative position to the base arm (12). 3. Bagger nach Anspruch 1, dadurch gekennzeichnet, daß der Vorausleger (24) kraftbetrieben in beide Rich­tungen um das Schwenkgelenk (14) drehbar ist, wobei der Kraftantrieb (36) in jeder erzielbaren Relativ­stellung des Vorauslegers (24) zu dem Grundausleger (12) blockierbar ist.3. Excavator according to claim 1, characterized in that the advance arm (24) is rotatably driven in both directions about the swivel joint (14), the power drive (36) in any achievable relative position of the advance arm (24) to the basic boom (12) can be blocked. 4. Bagger nach Anspruch 1, dadurch gekennzeichnet, daß ein Steuerorgan für den Grundausleger (12) auf die Steuerfunktion des Hydraulikantriebes (34) für den Vorausleger (24) umschaltbar ist.4. Excavator according to claim 1, characterized in that a control member for the basic boom (12) on the control function of the hydraulic drive (34) for the advance arm (24) is switchable. 5. Bagger nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Vertikallage der Schwenk­achse (16) des Schwenkgelenks (14) relativ zu dem Grundausleger (12) verstellbar ist.5. Excavator according to one of claims 1 to 4, characterized in that the vertical position of the pivot axis (16) of the swivel joint (14) is adjustable relative to the basic boom (12).
EP88109305A 1987-06-10 1988-06-10 Excavator Expired - Lifetime EP0294843B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88109305T ATE66986T1 (en) 1987-06-10 1988-06-10 EXCAVATOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3719341 1987-06-10
DE19873719341 DE3719341A1 (en) 1987-06-10 1987-06-10 EXCAVATOR

Publications (2)

Publication Number Publication Date
EP0294843A1 true EP0294843A1 (en) 1988-12-14
EP0294843B1 EP0294843B1 (en) 1991-09-04

Family

ID=6329413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109305A Expired - Lifetime EP0294843B1 (en) 1987-06-10 1988-06-10 Excavator

Country Status (3)

Country Link
EP (1) EP0294843B1 (en)
AT (1) ATE66986T1 (en)
DE (2) DE3719341A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1433549A (en) * 1965-02-18 1966-04-01 Poclain Sa Additional mast for hydraulic excavator
DE2154724A1 (en) * 1971-11-04 1973-05-10 Orenstein & Koppel Ag BOOM FOR HORIZONTAL AND VERTICAL SWIVELING OF THE WORK TOOL
FR2164611A1 (en) * 1971-12-21 1973-08-03 Rheinstahl Ag Hanomag Baumasch
US4077140A (en) * 1976-03-31 1978-03-07 Societa Italiana Macchine Industriali Torino, S.P.A. Hydraulic excavator equipment for excavation laterally of the excavator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1433549A (en) * 1965-02-18 1966-04-01 Poclain Sa Additional mast for hydraulic excavator
DE2154724A1 (en) * 1971-11-04 1973-05-10 Orenstein & Koppel Ag BOOM FOR HORIZONTAL AND VERTICAL SWIVELING OF THE WORK TOOL
FR2164611A1 (en) * 1971-12-21 1973-08-03 Rheinstahl Ag Hanomag Baumasch
US4077140A (en) * 1976-03-31 1978-03-07 Societa Italiana Macchine Industriali Torino, S.P.A. Hydraulic excavator equipment for excavation laterally of the excavator

Also Published As

Publication number Publication date
ATE66986T1 (en) 1991-09-15
DE3864591D1 (en) 1991-10-10
DE3719341A1 (en) 1988-12-29
EP0294843B1 (en) 1991-09-04

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