Patent Application
20180195252
The invention relates to a cantilever, in particular for a utility vehicle,
Such cantilevers that are usually embodied as parallel guides are known from, for example, EP 1 903 147 A. In general, two such cantilevers are mounted on a vehicle beside one another and connected to one another, and they move a tool that is fastened to the cantilevers. In addition to a control that is as accurate as possible, in this case there are additional aims to improve such cantilevers. On the one hand, the field of view of an operator is to be limited as little as possible; on the other hand, the cantilever is to be able to be operated as safely as possible. Both can be achieved in that as many elements of the cantilever as possible are concealed under a lining. Thus, fouling of the movable parts of the cantilever leading to wear can be reduced. In addition, many movable parts, which otherwise represent a potential risk of injury, are no longer easily accessible. However, in the case of a conventional arrangement of the elements of a parallel guide, the lining occupies a large part of the field of view of an operator, which greatly limits comfort during operation, on the one hand, and creates a new safety risk, on the other hand, since the operator can no longer survey his environs.
EP 1 903 147 A supplies a proposed solution to make the cantilever more slender and thus to give the operator a better field of view. In this case, a strut of the cantilever is bent in such a way that the central area of the strut is offset further into the spar for the most part. This has the drawback, however, that the strut, which has buckling points or a curvature created by this shape, loses stability. This has to be offset by making the strut more massive, which both makes production more expensive and produces a higher weight.
The object of the invention is therefore to overcome the above-described drawbacks and to make available a compact—and in this case sturdy and economical—option for cantilevers of the above-mentioned type.
This object is achieved according to the invention by a cantilever of the above-mentioned type, which is characterized in that
Because of this non-parallel, but “crosswise,” arrangement, much more space can be saved, whereby the rear strut winds up bent to a much lesser extent. In this case, the spar acts simultaneously as a lining and a carrier for the fixed axes. Thus, only the struts that pivot around movable axes are necessary.
This saves space and simultaneously eliminates the necessity for a parallel arrangement. In a preferred embodiment, the struts are therefore arranged essentially inside the spar.
In a preferred further development of the invention, the front strut has a tool drive, by which the length of the strut can be changed in order to move the tool lever. Of course, embodiments without a tool drive are also conceivable. In this case, the tool, as known from parallel guides, is moved. In another preferred embodiment of the invention, a tool guide that can be connected with a tool is arranged for the movement on the tool lever.
In order to configure the tool lever and the associated tool guide in an easily accessible manner, the tool lever—in another preferred embodiment—is arranged essentially half outside and half inside the spar.
In the state of the art, in the case of cantilevers that have a sharp bend, the deflecting triangle is arranged oriented in the area of the sharp bend and with the (central) fixed axis on the outside of the sharp bend. In an especially preferred embodiment of the invention, the crossing is created in such a way that the deflecting triangle is arranged inversely. Consequently, in an especially preferred embodiment of the invention, the spar has a sharp bend, the central fixed axis of the deflecting triangle is arranged in the area of the inside of the sharp bend, and the second and third strut pivot axes are arranged at some distance therefrom.
Additional preferred embodiments of the invention are the subject matter of the other subclaims.
Below, a preferred embodiment of the invention is described in more detail based on the drawings. Here:
The cantilever 1 shown in
It is clear that the rear fixed axis 4 in the depicted orientation of the cantilever 1 lies above the first strut pivot axis 12, and the central fixed axis 9 lies below the second strut pivot axis 13. This is accomplished in that the deflecting triangle 8, unlike in the state of the art, is arranged inversely in the spar 3. The deflecting triangle 8 is thus located specifically in the area of a sharp bend 22 of the spar 3, as is common in the state of the art. However, the central fixed axis of the deflecting triangle 8 is arranged in the area of an inner side of the sharp bend 22.
The basic crosswise arrangement of the struts according to the invention is illustrated in more detail in
It is clear that the rear strut 11 that is depicted by the rear dotted line 23 intersects the first plane and that the front strut 14, which is symbolically depicted by the front dotted line 24, intersects the second plane.
| Number | Date | Country | Kind |
|---|---|---|---|
| A267/2015 | May 2015 | AT | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/AT2016/000052 | 5/3/2016 | WO | 00 |
