DE1484752C

DE1484752C - Backhoe excavator

Info

Publication number: DE1484752C
Application number: DE19631484752
Authority: DE
Inventors: Gabriel Le Plessis-Belleville Guinot (Frankreich)
Original assignee: Poclain S.A., Le Plessis-Belleville, Oise (Frankreich)
Priority date: 1962-05-17
Filing date: 1963-05-17
Publication date: 1973-04-05

Description

3 43 4

Der in der Zeichnung dargestellte Tieflöffelbagger lenkachse 20 des inneren Auslegerteils 3 α einerseits und weist ein Untergestell 1, vorzugsweise mit Selbstan- einer Gelenkachse 21 des mittleren Auslegerteils 13 trieb auf, auf dem schwenkbar ein Baggergerüst 2 an- andererseits ist ein hydraulischer Zylinder 19 angegeordnet ist. Der Ausleger des Tieflöffelbaggers be- lenkt, der eine Verstellung des gesamten Gelenksteht aus drei Teilen, von denen der innere Ausleger- 5 Parallelogramms ermöglicht.The backhoe excavator shown in the drawing steering axis 20 of the inner boom part 3 α on the one hand and has an underframe 1, preferably with an articulated axis 21 of the central boom part 13 drove on, on which an excavator frame 2 can be pivoted - on the other hand, a hydraulic cylinder 19 is arranged is. The boom of the backhoe steers, which allows adjustment of the entire joint of three parts, of which the inner boom allows 5 parallelograms.

teil 3 α um eine horizontale Querachse 4 schwenkbar Beim Betrieb des Tieflöffelbaggers ist nach F i g. 2 mit dem Baggergerüst 2, der mittlere Auslegerteil 13 zum Ausheben eines Grabens in Richtung des Pfeium eine zur Längsrnittellinie des inneren Auslegerteils les A das Untergestell 1 parallel zur Pfeilrichtung A 3 a senkrecht verlaufende Achse schwenkbar mit dem aufgestellt, während das Baggergerüst 2 selbst derart inneren Auslegerteil 3 α und der äußere Auslegerteil io auf dem Untergestell 1 ausgerichtet ist, daß der innere 36 um eine zu der Schwenkachse 16 des mittleren Auslegerteil 3 α in einer zur Richtung des Pf eils A par-Auslegerteil 13 parallel verlaufende Achse 17 allelen, senkrechten Ebene schwenkt. Durch Betätischwenkbar mit dem mittleren Auslegerteil 13 ver- gung des hydraulischen Zylinders 19 wird das Gelenkbunden ist. Der den Tieflöffel 10 tragende Löffel- parallelogramm derart verschwenkt, daß der Löffelstiel 8 ist um eine zu der horizontalen Querachse 4 des 15 stiel 8 die in F i g. 2 gestrichelt gezeichnete Lage eininneren Auslegerteils 3 α parallel verlaufende Achse 7 nimmt. Der Tieflöffel 10 arbeitet nun in an sich beschwenkbar am äußeren Auslegerteil 3 b gelagert. Der kannter Weise, wobei die Achse 7 des Löffelstieles 8 innere Auslegerteil 3 a ist durch einen hydraulischen horizontal und parallel zur Querachse 4 des inneren Druckmittelzylinder 5 schwenkbar. Zum Schwenken Auslegerteils 3 α liegt.part 3 α pivotable about a horizontal transverse axis 4 When operating the backhoe excavator is according to F i g. 2 with the excavator frame 2, the middle boom part 13 for digging a trench in the direction of the arrow a to the longitudinal center line of the inner boom part les A the underframe 1 parallel to the arrow direction A 3 a perpendicular pivotable with the set up, while the excavator frame 2 itself such inner Boom part 3 α and the outer boom part io is aligned on the underframe 1 that the inner 36 allelic about a to the pivot axis 16 of the central boom part 3 α in a parallel to the direction of the arrow A par boom part 13 axis 17 allelic, vertical plane pivots. By being actuated pivotable with the central boom part 13 relative to the hydraulic cylinder 19, the articulated joint is. The spoon parallelogram carrying the backhoe 10 is pivoted in such a way that the dipper stick 8 is around a stick 8 to the horizontal transverse axis 4 of the 15 that is shown in FIG. 2 position shown in dashed lines an inner boom part 3 α parallel axis 7 takes. The backhoe bucket 10 is now working in itself pivotably mounted on the outer boom part 3 b . The known way, the axis 7 of the dipperstick 8 inner boom part 3 a is pivotable horizontally and parallel to the transverse axis 4 of the inner pressure cylinder 5 by a hydraulic. To pivot the boom part 3 α is located.

des Löffelstiels 8 dient ein hydraulischer Zylinder 9, 20 Sobald der Tieflöffel 10 beladen ist, wird der ge-of the dipperstick 8 is a hydraulic cylinder 9, 20 As soon as the backhoe 10 is loaded, the

der mit dem äußeren Auslegerteil 3 b verbunden ist. samte Ausleger mit Hilfe des Druckmittelzylinders 5which is connected to the outer boom part 3 b . entire boom with the help of the hydraulic cylinder 5

Schließlich ist am Löffelstiel 8 ein hydraulischer Zy- gehoben, wobei das Gelenkparallelogramm über demFinally, a hydraulic cylinder is lifted on the dipperstick 8, with the joint parallelogram above the

linder 12 zum Schwenken des Tieflöffels 10 ange- hydraulischen Zylinder 19 derart verformt wird, daßCylinder 12 for pivoting the backhoe 10 is deformed hydraulic cylinder 19 in such a way that

lenkt, der um eine zu der Achse 7 parallele Achse 11 der Ausleger die mit ausgezogenen Linien dargestelltesteers that about an axis 11 of the boom parallel to the axis 7 is the one shown in solid lines

des Löffelstiels8 verschwenkbar ist. 25 Stellung einnimmt. Der Löffelstiele wird anschlie-of the dipperstick8 is pivotable. 25 takes position. The dipperstick is then

Zur parallelen Ausschwenkung des äußeren Aus- ßend mit Hilfe des hydraulischen Zylinders 9 betätigt,For the parallel pivoting of the outer outer end, actuated with the aid of the hydraulic cylinder 9,

legerteils 3 b gegenüber dem inneren Auslegerteil 3 α damit das im Tieflöffel 10 enthaltene Baggergut in einleg part 3 b relative to the inner boom part 3 α so that the excavated material contained in the backhoe 10 in a

ist zwischen dem inneren Auslegerteil 3 α und dem au- Fahrzeug geleert werden kann. Nach dem Entleerenis between the inner boom part 3 α and the au- vehicle can be emptied. After emptying

ßeren Auslegerteil 3 b ein zum mittleren Äuslegerteil wird der Tieflöffel 10 in die in der Zeichnung gestri-ßeren boom part 3 b a to the middle part of the boom, the backhoe bucket 10 is stretched in the drawing

13 parallel verlaufender Lenker 14 angeordnet, der in 30 chelt dargestellte Lage zurückgebracht. Bei diesen Be-13 arranged parallel handlebars 14, brought back the position shown in 30 chelt. With these

seiner Länge so bemessen und mit seinen Enden der- wegungen des Tieflöffels 10 verschiebt sich der äußereIts length is dimensioned in such a way and with its ends the movements of the backhoe bucket 10 shifts the outer one

art an Schwenkachsen 15 bzw. 18 des inneren bzw. Auslegerteil 3 b stets parallel innerhalb der durch diekind of pivot axes 15 and 18 of the inner or boom part 3 b always parallel within the through the

des äußeren Auslegerteils 3 α bzw. 3 b angelenkt ist, Querachse 4 und die Achse 7 bestimmten Ebene, der-of the outer boom part 3 α or 3 b is articulated, transverse axis 4 and the axis 7 specific plane, the-

daß er zusammen mit den drei Auslegerteilen 3 a, 13, art, daß die Achse 7 stets parallel zur Querachse 4that it, together with the three boom parts 3 a, 13, art that the axis 7 is always parallel to the transverse axis 4

3b ein Gelenkparallelogramm bildet. An einer Ge- 35 liegt. 3b forms a joint parallelogram. Located on a corner.

Hierzu 1 Blatt Zeichnungen 1 sheet of drawings

Claims

Claim:

Backhoe excavator, especially for work with laterally offset excavation tools, with a boom consisting of three parts, of which the inner boom part can be pivoted with the excavator frame about a horizontal transverse axis, the middle boom part can be pivoted about an axis running perpendicular to the longitudinal center line of the inner boom part and the horizontal transverse axis with the inner boom part and the outer boom part is pivotably connected to the central boom part about an axis running parallel to the pivot axis of the central boom part, with a bucket arm that is pivotably mounted on the outer boom part in a vertical plane and carries a bucket, with one with the inner and the outer one Boom part articulated link which, together with the three boom parts, forms an articulated parallelogram through which the pivot axis of the dipperstick is kept parallel to the horizontal transverse axis, and with a supported on the excavator frame and on the Ausle ger acting pressure cylinder, characterized in that the inner boom part (3 a) is designed as an elongated support arm, which at one end with the horizontal transverse axis (4) and at its other end with the pivot axis (15) of the middle boom part (13) is connected that the pressure medium cylinder (S) is arranged below the boom and acts on the inner boom part (3 a), and that a one hand on the middle boom part (13) and on the other hand on the inner or outer boom part (3 a, 3 b) articulated hydraulic Cylinder (19) is provided.

The invention relates to a backhoe excavator, in particular for working with a laterally offset excavation tool, with a boom consisting of three parts, of which the inner boom part by one horizontal transverse axis pivotable with the excavator frame, the middle boom part around a to the longitudinal center line of the inner boom part and the axis running perpendicular to the horizontal transverse axis pivotable with the inner boom part and the outer boom part about one to the pivot axis of the middle one Cantilever part pivotally connected to the central boom part is, with a pivotable on the outer boom part in a vertical plane, carrying a backhoe Dipperstick, with a link articulated to the inner and outer boom part, which, together with the three boom parts, forms an articulated parallelogram through which the pivot axis of the dipperstick is held parallel to the horizontal transverse axis, and with one on the excavator frame supported and acting on the boom pressure cylinder.

In a known backhoe of this type, the outer and middle boom parts are long Support arms and the inner boom part designed as part of a universal joint through which the middle Boom part is hinged directly to the excavator frame. Because of this special version of the Boom, the well-known excavator is not suitable for work with higher lateral obstacles, the boom should be overridden or where there is a deep engagement on the one opposite the excavator Rear side of such side obstacles is desirable. Namely, when deep trenches

■ are to be lifted, parts of the boom hit very hard soon to the edge of the trench or to existing side embankments of such a trench. The boom of the known excavator is not for the parallel guidance of the arm axis and the inner horizontal one Transverse axis suitable for a running sideways swiveling back and forth. Rather, only one is sideways Adjustment, but not an oscillating drive for the side pivoting of the boom. In addition, the handlebar is arranged between the boom and the dipperstick and is used for bucket operation so arranged in the known boom.

ao that they are in a lateral unloading position during a deep intervention easily comes into collision with obstacles on the side and only a limited depth of intervention the dipper stick into the trench. The invention has for its object to be a To design backhoe excavators of the type mentioned so that the pivot axis of the central boom part lifted over obstacles and a continuous one with the excavation and loading point offset on both sides Back and forth movement of the Tieflöf rock. By pivoting the central boom part with respect to the inner boom part can be made.

The solution to this problem is, according to the invention, that the inner boom part as elongated Support arm is formed, which at one end with the horizontal transverse axis and at his the other end is connected to the pivot axis of the central boom part that the pressure medium cylinder is arranged below the boom and engages the inner boom part, and that one on the one hand on the middle boom part and on the other hand on the inner or outer boom part articulated hydraulic Cylinder is provided.

This makes it possible to carry out excavation work over a retaining wall or the like with the excavator, the excavator itself and the removal vehicle being on the same side of this wall. Included the middle boom part can be swiveled out in a horizontal position while the excavator frame and the inner boom part take up a position on this side of the obstacle that is parallel to the digging direction.

Another advantage of the invention is that the pressure cylinder for the vertical pivoting of the boom as a result of its attack on the laterally fixed inner boom part without the risk of collision with side obstacles on the underside of the boom. The hub this pressure cylinder on the excavator frame is therefore comparatively deep, which makes it expensive Elevated supporting structures within the excavator frame for the articulation of the hydraulic cylinder omitted. An embodiment of a backhoe excavator according to the invention is based on the Drawing explained. It shows

Fig. 1 is a side view of a hydraulic backhoe excavator and

F i g. 2 is a plan view of the backhoe excavator according to FIG. 1.