DE1484752B

DE1484752B - Backhoe excavator

Info

Publication number: DE1484752B
Authority: DE
Inventors: Gabriel Le Plessis-Belleville Guinot (Frankreich)
Original assignee: Poclain S.A., Le Plessis-Belleville, Oise (Frankreich)

Description

Der in der Zeichnung dargestellte Tieflöffelbagger weist ein Untergestell 1, vorzugsweise mit Selbstantrieb auf, auf dem schwenkbar ein Baggergerüst 2 angeordnet ist. Der Ausleger des Tieflöffelbaggers besteht aus drei Teilen, von denen der innere Auslegerteil 3 α um eine horizontale Querachse 4 schwenkbar mit dem Baggergerüst 2, der mittlere Auslegerteil 13 um eine zur Längsmittelünie des inneren Auslegerteils 3 α senkrecht verlaufende Achse schwenkbar mit dem inneren Auslegerteil 3 α und der äußere Auslegerteil 3b um eine zu der Schwenkachse 16 des mittleren Auslegerteil 13 parallel verlaufende Achse 17 schwenkbar mit dem mittleren Auslegerteil 13 verbunden ist. Der den Tieflöffel 10 tragende Löffelstiel 8 ist um eine zu der horizontalen Querachse 4 des inneren Auslegerteils 3 α parallel verlaufende Achse 7 schwenkbar am äußeren Auslegerteil 3 b gelagert. Der innere Auslegerteil 3 a ist durch einen hydraulischen Druckmittelzylinder 5 schwenkbar. Zum Schwenken des Löffelstiels 8 dient ein hydraulischer Zylinder 9, der mit dem äußeren Auslegerteil 3 b verbunden ist. Schließlich ist am Löffelstiel 8 ein hydraulischer Zylinder 12 zum Schwenken des Tieflöffels 10 angelenkt, der um eine zu der Achse 7 parallele Achse 11 des Löffelstiels 8 verschwenkbar ist.The backhoe excavator shown in the drawing has an underframe 1, preferably self-propelled, on which an excavator frame 2 is pivotably arranged. The boom of the backhoe consists of three parts, of which the inner boom part 3 α can be pivoted about a horizontal transverse axis 4 with the excavator frame 2, the middle boom part 13 can be pivoted about an axis perpendicular to the longitudinal center line of the inner boom part 3 α with the inner boom part 3 α and the outer jib part 3b is connected to the middle jib part 13 so as to be pivotable about an axis 17 running parallel to the pivot axis 16 of the middle jib part 13. The dipperstick 8 carrying the backhoe 10 is pivotably mounted on the outer boom part 3 b about an axis 7 running parallel to the horizontal transverse axis 4 of the inner boom part 3 α . The inner boom part 3 a can be pivoted by means of a hydraulic pressure cylinder 5. A hydraulic cylinder 9, which is connected to the outer boom part 3 b , is used to pivot the dipperstick 8. Finally, a hydraulic cylinder 12 is articulated on the dipperstick 8 for pivoting the backhoe bucket 10, which cylinder can be pivoted about an axis 11 of the dipperstick 8 that is parallel to the axis 7.

Zur parallelen Ausschwenkung des äußeren Auslegerteils 3 b gegenüber dem inneren Auslegerteil 3 a ist zwischen dem inneren Auslegerteil 3 α und dem äußeren Auslegerteil 3 b ein zum mittleren Auslegerteil 13 parallel verlaufender Lenker 14 angeordnet, der in seiner Länge so bemessen und mit seinen Enden derart an Schwenkachsen 15 bzw. 18 des inneren bzw. des äußeren Auslegerteils 3 α bzw. 3 b angelenkt ist, daß er zusammen mit den drei Auslegerteilen 3 a, 13, 3 b ein Gelenkparallelogramm bildet. An einer Gelenkachse 20 des inneren Auslegerteils 3 α einerseits und einer Gelenkachse 21 des mittleren Auslegerteils 13 andererseits ist ein hydraulischer Zylinder 19 angelenkt, der eine Verstellung des gesamten Gelenk-Parallelogramms ermöglicht.For parallel pivoting of the outer boom part 3 b relative to the inner boom part 3 a , a link 14 running parallel to the middle boom part 13 is arranged between the inner boom part 3 α and the outer boom part 3 b , the length of which is so dimensioned and its ends in such a way Pivot axes 15 and 18 of the inner and outer boom part 3 α and 3 b is articulated that it forms a joint parallelogram together with the three boom parts 3 a, 13, 3 b. A hydraulic cylinder 19 is articulated on a hinge axis 20 of the inner boom part 3 α on the one hand and a hinge axis 21 of the middle boom part 13 on the other hand, which enables the entire joint parallelogram to be adjusted.

Beim Betrieb des Tieflöffelbaggers ist nach F i g. 2 zum Ausheben eines Grabens in Richtung des Pfeiles A das Untergestell 1 parallel zur Pfeilrichtung A aufgestellt, während das Baggergerüst 2 selbst derartWhen operating the backhoe excavator, according to FIG. 2 for digging a trench in the direction of arrow A, the underframe 1 is set up parallel to the direction of arrow A , while the excavator 2 itself is in this way

ίο auf dem Untergestell 1 ausgerichtet ist, daß der innere Auslegerteil 3 α in einer zur Richtung des Pfeils A parallelen, senkrechten Ebene schwenkt. Durch Betätigung des hydraulischen Zylinders 19 wird das Gelenkparallelogramm derart verschwenkt, daß der Löffelstiel 8 die in F i g. 2 gestrichelt gezeichnete Lage einnimmt. Der Tieflöffel 10 arbeitet nun in an sich bekannter Weise, wobei die Achse 7 des Löffelstieles 8 horizontal und parallel zur Querachse 4 des inneren Auslegerteils 3 α liegt.ίο is aligned on the underframe 1 that the inner boom part 3 α pivots in a parallel to the direction of the arrow A , perpendicular plane. By actuating the hydraulic cylinder 19, the parallelogram of the joint is pivoted in such a way that the dipperstick 8 is the one shown in FIG. 2 position shown in dashed lines. The backhoe bucket 10 now works in a manner known per se, the axis 7 of the dipperstick 8 being horizontal and parallel to the transverse axis 4 of the inner boom part 3 α .

Sobald der Tieflöffel 10 beladen ist, wird der gesamte Ausleger mit Hilfe des Druckmittelzylinders S gehoben, wobei das Gelenkparallelogramm über dem hydraulischen Zylinder 19 derart verformt wird, daß der Ausleger die mit ausgezogenen Linien dargestellte Stellung einnimmt. Der Löffelstiele wird anschließend mit Hilfe des hydraulischen Zylinders 9 betätigt, damit das im Tieflöffel 10 enthaltene Baggergut in ein Fahrzeug geleert werden kann. Nach dem Entleeren wird der Tieflöffel 10 in die in der Zeichnung gestrichelt dargestellte Lage zurückgebracht. Bei diesen Bewegungen des Tieflöffels 10 verschiebt sich der äußere Auslegerteil 3 b stets parallel innerhalb der durch die Querachse 4 und die Achse 7 bestimmten Ebene, derart, daß die Achse 7 stets parallel zur Querachse 4 Hegt.As soon as the backhoe 10 is loaded, the entire boom is lifted with the aid of the pressure cylinder S, the articulated parallelogram above the hydraulic cylinder 19 being deformed in such a way that the boom assumes the position shown in solid lines. The dipper stick is then actuated with the aid of the hydraulic cylinder 9 so that the dredged material contained in the backhoe 10 can be emptied into a vehicle. After emptying the backhoe 10 is returned to the position shown in dashed lines in the drawing. During these movements of the backhoe 10, the outer boom part 3 b is always displaced parallel within the plane defined by the transverse axis 4 and the axis 7, in such a way that the axis 7 is always parallel to the transverse axis 4.

Hierzu 1 Blatt Zeichnungen 1 sheet of drawings

Claims

1 21 2

is steering. Because of this special version of the

Claim: The well-known excavator is not suitable for the boom

Work involving higher lateral obstacles of

Backhoe excavators, especially for work with the boom, are to be overridden or if the excavator tools are offset laterally, with a deep engagement on the boom opposite the excavator, which consists of three parts, of which the rear of such lateral obstacles has the inner boom part around a horizontal cross is desired. Namely, if deep trenches can be pivoted out axis with the excavator frame that is to be lifted, parts of the boom abut very middle boom part around a to the longitudinal center line soon to the edge of the trench or to existing sides of the inner boom part and to the horizontal slopes of such a trench. The boom transverse axis pivoting axis of the known excavator is not for parallel guidance with the inner boom part and the outer arm of the dipperstick axis and the inner horizontal boom part around a to the pivot axis of the central transverse axis for a running sideways back and forth boom part parallel axis pivoting suitable. Rather, there is only an adjustment that can be swiveled sideways with the middle boom part, but not an oscillating drive, with a pivoting mounted on the outer boom part in the vertical plane provided for the side swiveling of the boom Backhoe-carrying dipper stick, with a handlebar arranged with the inner and outer boom parts, which is used for bucket operation, in the known boom so arranged, kig connected handlebar, which together with the 20 that, when deeply engaging in the lateral jib, has three boom parts. Joint parallelogram formation easily collides with lateral obstacles, through which the swivel axis of the dipperstick comes sion and also only a limited depth of engagement is kept parallel to the horizontal transverse axis, allows the dipperstick in the ditch,
and with a supported on the excavator frame and the object of the invention is to provide a

pressure cylinder acting on the boom, backhoe excavator of the type mentioned at the outset, characterized in that the inbüden that the pivot axis of the middle boom part (3 a) is lifted over obstacles as an elongated support part and is formed with both arms, which is at its one End with offset excavation and loading point a continuous horizontal transverse axis (4) and at its beginning back and forth movement of the backhoe bucket through its end with the pivot axis (15) of the middle 3 ° pivoting of the middle boom part with respect to the ren boom part ( 13) is connected so that the inner boom part can be made.
Pressure cylinder (5) below the boom The solution to this problem is according to the invention

is arranged and on the inner boom part (3 d) in that the inner boom part engages as long, and that a support arm is formed on the one hand on the middle stretched out support arm, which is on its one laying part (13) and on the other hand at the inner or outer end is provided with the horizontal transverse axis and on its outer boom part (3 a, 3 b) articulated hydraulic other end with the pivot axis of the middle shear cylinder (19). Boom part is connected that the Druckmittelzy

linder is arranged below the boom and on

inner boom part engages, and that one on the one hand

40 on the middle boom part and on the other hand on the inner or outer boom part articulated hydraulic

The invention relates to a backhoe excavator, which is provided with a cylinder.

especially for working with a laterally offset bag- This makes it possible to use the excavator excavator tool, work with a three-part work over a retaining wall or the like. of which the inner boom part lead around a 45, with the excavator itself and the discharge driving horizontal The transverse axis can be swiveled with the excavator and are on the same side of this wall. Included frame, the middle boom part by one to the longitudinal, the middle boom part in a horizontal position center line of the inner boom part and to the horizon- can be swiveled out while the excavator frame Tal transverse axis perpendicular to the axis and the inner boom part to the direction of digging pivotable with the inner boom and the external parallel position on this side of the obstacle Outrigger around one to the pivot axis of the middle.

leren Auslegerteüs parallel axis Another advantage of the invention is that

Swiveling pressure cylinder connected to the middle boom part for the vertical swiveling the is, with one on the outer boom part in the vertical of the boom as a result of its attack on the side On the level pivotably mounted, a backhoe bucket carrying 55 fixed inner boom part without collision areas Dipper stick, with one with the inside and drive with side obstacles on the underside of the the outer boom can be attached to the articulated Len boom. The hub ker, which lies together with the three boom parts of this pressure cylinder on the excavator frame so-articulated parallelogram forms, through which the swivel with comparatively deep, making complex, in the Axis of the dipper stick parallel to the horizontal transverse 60 height of the supporting structures within the axis is held, and with an excavator frame on the excavator frame for the articulation of the Druckmittelzyabgestützen and the pressure reliever acting on the boom are omitted. An embodiment of a deep center cylinder. . Backhoe according to the invention is based on the

In a known backhoe excavator of this type drawing explained. It shows

are the outer and the middle Auslegerteü as long 65 Fi g. 1 is a side view of a hydraulic low support arm and the inner boom part as part of the backhoe and

executed a universal joint, through which the middle Fig.2 is a plan view of the backhoe excavator

Lere boom parts attached directly to the excavator frame - according to Fig. 1.