DE7731421U1 - BUCKET FOR EXCAVATORS - Google Patents

Description

36 369 L / ra

October 11, 1977

Liebherr-Hydraulikbagger GmbH, 7 951 Kirchdorf

Backhoe bucket for excavators

The invention relates to a backhoe for excavators, in particular drainage spoon, with an ejector, which by means of a connecting strap of the spoon from a Working position is adjustable in a discharge position.

Such backhoes are known. The actuation takes place of the ejector in some embodiments by a Stop on the stick. This construction has the disadvantage that the ejection movement in its speed and thus in timing cannot be influenced. The ejection speed is therefore equal to the bucket speed.

An even greater disadvantage is that when working near the device, only a minimal and in extreme cases there is even no content at all. This disadvantage can only be circumvented if the work area of the backhoe bucket is reduced.

In other known backhoe buckets, the actuation takes place of the ejector by means of a four-bar gear, which is driven by the connecting tab of the spoon. Such constructions are complex, have a larger space requirement, an additional storage point and a higher one Weight. In addition, the speed of the ejector can be influenced by the various types Arrangement of the pivot points difficult.

Finally, it is known in such a deep loader that it is actuated by a hydraulic cylinder built into the bucket. This construction requires one high technical effort. It's more expensive and heavier. The operator has to perform an additional function. The means loss of time and additional workload for the operator.

The invention is based on the object of the known backhoe bucket to improve in such a way that the ejector allows an optimal content of the grave vessel as long as possible and the ejector only shortly before the spoon is in its end position, the ejector can be swiveled forward and the goods ejects.

The solution to the problem posed by the invention consists in a backhoe of the type described above in that the ejector is rotatably mounted within the spoon and can be controlled via a curve by means of the connecting strap. In one embodiment, the The ejector itself is partially designed as a curve and is the connecting strap with a roller or a sliding block Mistake. In another embodiment, the curve is arranged on the handle and is on the pivot bearing of the ejector a control cam is provided. The advantage of the backhoe bucket according to the invention is that by means of Curve with a pivoting movement of the connecting plate, depending on the design of the curve, a relatively fast movement the ejector is made possible by its pivot bearing.

The invention is explained by way of example in the following description with reference to the drawing in two embodiments. Show it:

illustration 1

Figure 2
Figure 3

an excavator with a backhoe bucket according to the invention in the working position (lower figure) and in the dispensing position (top illustration);

an embodiment of a backhoe according to the invention and

another embodiment of a backhoe bucket according to the invention.

773H21

The backhoe bucket 1, especially Drainagelöffei, is in both Embodiments connected to the excavator in a known manner via a dipper stick Io. In both embodiments, the bucket 1 is provided with an ejector 2, which is adjustable within the spoon 1 in a pivot bearing 5 from a working position to a dispensing position. In both embodiments, the adjustment takes place Backhoe 1 from the working position into a dumping position by means of a hydraulic cylinder 9, which with a The end is arranged pivotably on a connecting tab of the dipper stick Io. The piston rod of the hydraulic cylinder 9 engages one end of a reversing lever 8, the other end of which is pivotably articulated on the dipper stick Io is. In both embodiments, the deflection lever 8 is connected to the spoon 1 via a connecting strap 3. The connecting strap 3 is articulated in the swivel joint 4 of the spoon 1. In both embodiments is the bucket 1 in the pivot bearing 6 is connected to the dipper stick Io.

In the embodiment of Figure 2, the ejector is 2 even partially designed as a curve. The connecting plate 3 has an extension beyond the pivot bearing 4 12. At the end of the extension 12 of the connecting plate 3, a roller 7 is arranged, which is on the back of the ejector 2 is applied and when the spoon 1 is actuated by means of the hydraulic cylinder 9 this is adjustable along. Due to this construction, there is a pivoting movement of the connecting strap 3, depending on the design of the curve 13, a relatively rapid movement of the ejector 2 around his pivot bearing 5 allows.

773U21 01/26/78

In the embodiment of Figure 3 is on the dipper stick a curve 14 is formed. A control cam 11 is provided on the pivot bearing 5 of the ejector 2 and is connected to the cam 14 of the dipper stick Io interacts. With this construction, too, the connecting strap is in a pivoting movement depending on the design of the curve 14 enables a relatively rapid movement of the ejector 2 in its pivot bearing 5.

Claims (3)

PROTECTION CLAIMS 1. Backhoe buckets for excavators, especially drainage buckets, by means of a hydraulic cylinder and a connecting strap of the bucket from a working position is adjustable in a discharge position and vice versa, characterized in that that the Ausv / erfer (2) rotatably mounted (5) within the spoon (1) and via a curve (13; 14) by means of the connecting leash (3) is controllable. 2. Backhoe bucket according to claim 1, characterized in that that the ejector (2) itself partly as a curve (13) ] is formed and the connecting strap (3) with a roller (7) or a sliding block is provided (= Figure 2). f 3. Backhoe bucket according to claim 1, characterized in that j that the curve (14) is arranged on the handle (lo) and a control cam on the pivot bearing (5) of the ejector (2) (11) is provided (= Figure 3).