DE9005358U1 - Stump grinder - Google Patents

Description

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•IEufopeäm:;Patent .'Attorney

Patent and Civil Engineer Mandataire en brevets Europeanen

Patent office:

Brehmstrasse D-7320 Göpplngen

Tel. 07161-71166 Fax 07161-683529

Telegrams: ^»patent"

09 May 1990

G 9010 AWb Se/bs

Applicant :

Artur Willibald Zur Barbe 10

7770 Ueberlingen 18

Seasoning!Stump cutter

The innovation relates to a root cutter according to the generic term of the main claim.

M Particularly when replanting deforested forests, there is a requirement for the tree stumps to be removed quickly and in an environmentally friendly manner without damaging the immediate surrounding forest floor.

KrtlMpirkMlt QOpplngcn

•^oilicAtckkonto SlulVgirt (bank code «0010070) No. UM03-702

The devices known to date do not work satisfactorily in all applications , particularly in difficult terrain, due to a lack of sufficient mobility and confusing technical equipment. The aim of this innovation is therefore to achieve this.

This extension is essentially achieved by the means and measures specified in the protection claim. The inventions also include advantageous further developments or refinements of the basic system according to the innovation, which is also shown largely schematically in the drawing and is described in more detail below using these representations. J^ Shown are:

Fig. 1 the new stump cutter in side view and

Fig. 2 is a plan view of Fig. 1.

Shown in Fig. 1 and 2 is the basic principle of a stump cutter, primarily as an attachment to a tractor 1 or other carrier vehicle, preferably with a reversing device and consisting of a disc-like,

The milling wheel is guided by hydraulically operated boom arms 2 and 3 and carries knife-like tools 5 or similar.

According to the innovation, it is now provided for such a device that the boom arms 2 and 3 are preferably designed in the form of discs and, in pairs, laterally encompass themselves and the cutting wheel 4.

This loosened design creates so-called "windows" between the individual boom arms 2 and 3, which give the operator, i.e. the driver of the carrier vehicle 1, a clear view of the milling wheel 4 and the respective work site, and thus make it possible for the first time to operate the stump cutter directly from the driver's seat via a corresponding control panel 14.

Furthermore, the new milling machine differs ^from all previously known devices in that the pair of boom arms 2 immediately adjacent to the carrier vehicle 1 is mounted on the attachment frame 8 of the entire unit via a common bracket 6 and can be pivoted horizontally about a vertical axis 7; this significantly extends the radius of action of the entire device.

In detail, it is possible to control all moving elements from the driver's cab 1a of the carrier vehicle 1, either directly via the tractor hydraulics or through a separate hydraulic system on the milling machine.

Finally, the structural and functional design also includes the direct drive of the cutting wheel 4 itself via a chain or V-belt 9 from the hydraulic motor 10, whereby the latter elements are preferably located on the boom arms 3, and the design of the tools 5 of the cutting wheel 4 as free-standing hard metal knives in an exchangeable form. For reasons of better clarity and clearer representation, the connecting line systems between the control panel and the hydraulic elements 10, 11, 12 have not been shown in the drawing.

List of reference numbers

1 tractor or carrier vehicle with driver's cab

2 boom arm

2a horizontal swivel axis

3 boom arm

3a horizontal swivel axis

4 Milling wheel
4a Rotation axis

5 Milling tool

6 Console

7 vertical swivel axis

8 mounting frames

9 V-belt or chain

Hydraulic motor

hydraulic actuating cylinder for vertical movement

" » &bgr; Horizontal movement

Ground support Control panel

Protective cover E Ground

F "Window"

W rootstock

Claims (5)

1. Stump cutter, primarily as an attachment to a tractor ( 1 ) or other carrier vehicle, preferably with a reversing device and consisting of a disc-like cutting wheel ( 4 ) guided by hydraulically operated boom arms ( 2 and 3 ) and carrying knife-like tools ( 5 ) or the like, characterized, that the boom arms (2 and 3) are also designed like discs and, in pairs, laterally encompass themselves and the cutting wheel (4). · Il Il III • t · · t » 2. Stump cutter according to claim 1, characterized in that that the boom arm pair (2) immediately adjacent to the carrier vehicle (1) is mounted on the attachment frame (8) of the entire unit via a common bracket (6) and so as to be horizontally pivotable about a vertical axis (7), 3. Stump cutter according to claims 1 and 2, marked by Operation of all moving elements from the driver's cab (la) of the carrier vehicle (1), namely a) either directly via the tractor hydraulics or?* b) through its own hydraulic system on the milling machine. 4. Stump cutter according to one of the preceding claims, marked by The milling wheel ( 4 ) itself is driven by a chain ^; | or V-belt ( 9 } from the hydraulic motor ( 10 ). I 5. Stump cutter according to at least one of the preceding claims, characterized, that the tools ( 5 ) of the milling wheel ( 4 ) are designed as free-standing hard metal knives.