FI80368C - FOERFARANDE OCH ANORDNING FOER ATT FRAESA STUBBAR. - Google Patents

Description

80368

METHOD AND APPARATUS FOR CRUSHING STOCKS-FÖRFARANDE OCH ANORDNING FÖR ATT FRÄSA STUBBAR

The invention relates to a method and a device for crushing bases by means of an accessory to be mounted on a work machine. By means of the device 5, the above-ground parts of the tree stump as well as some of the parts below the ground can be removed without having to damage the surrounding ground surface from a significantly wider area than the stump itself.

10 Nowadays, in order to provide a flat base for an area that used to be a tree-growing area, a significant effort has to be made to remove the tree stump and root system. In many cases, for example, the greenery of a golf course cannot be tolerated by a stump caused by a stump, but it is desired to obtain an impeccably even grass surface. Likewise, it is advantageous to remove the stumps on the ski slopes without removing the surrounding root system, as the remaining root system binds the soil and thus avoids erosion of the soil by rain and running water, which is often almost impossible to repair, especially in rin-20 neo-relations.

Methods used to remove the stump include lifting the entire stump with its roots from the ground, burning the stump, blasting, or mechanical crushing.

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In the case of mechanical crushing, the solutions used are mainly based on grinding milling with a rotating blade, in which case the wood material is removed in layers and the waste generated is fine chips. There are a number of known drum constructions, one of which is disclosed in U.S. Pat.

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Other known known methods of positioning the cutter are at the nose of an SUV or the like, in which case the milling is driven by the vehicle engine, or by connecting the cutter drum to a tractor hoist 2 80368 to drive the drum from the tractor's power take-off. that they are reached with a milling drum located at the rear of the tractor or on the cam of the SUV.

The main disadvantage of current milling drums is the space-consuming transmission, which is realized mainly by means of V-belts. Such structural solutions are large in size because the multi-grooved pulleys required for the V-belt drive have to be placed on the same axis as the drum so that the pulley provides a protrusion outside the drum's working area, with difficult to mill in tight spaces and below ground. In addition, it can be considered a shortcoming that the pit left by the milling drum has to be leveled separately, either by hand by shoveling or by using a separate earthmoving machine.

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The method and device according to the invention provide a decisive improvement in the above-mentioned drawbacks. In carrying out this, the device according to the invention is characterized by what is set forth in the characterizing part of claims 1 and 3.

The most important advantage of the invention is that the cutter-drum structure also allows milling below ground level and the transfer of soil is possible with the same working machine as the milling itself. In addition, due to the structure and placement of the blade pieces, the possibility of blade breakage is decisively reduced.

In the following, the invention will be explained in detail with reference to the accompanying drawings.

Figure 1 shows a combination of a stump crusher and a bucket to be attached to an implement.

Figure 2 shows pieces 8088 of blades 3 80368 placed on the edges of the crushing drum from direction A.

Figure 3 shows the articulated blade of the crushing drum.

Figure 4 shows a combination of a stump crusher and a bucket to be attached to an implement.

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The device according to Figure 1 is attached to the working machine by means of lugs (11) fixed to the body (12) of the device, to which a bucket (13) is also attached, with which soil materials can be transferred. The drum (1) for crushing the bases comprises 10 blade pieces (2) attached to the surface of the drum following a helical path, symmetrically from both centers of the drum towards each edge. As the drum edges approach, the height of the blade pieces (2) substantially lowers, causing a centering effect along with the helical arrangement of the blade pieces, as a result of which, as the drum rotates, lateral forces tend to guide and hold the center of the drum against the carrier. The drum (1) is mounted at each end on the frame (12). The power unit (3) rotating the drum is fastened at one end to a separate spacer-20 (4) with screws (5) and the spacer flange (4) is fixedly fitted to the frame (12). The transmission shaft (6) of the power unit is a round hub (7) which is fastened to the circular end plate (9) inside the drum by means of screws (8), whereby the power-side end of the drum rotates on the power-bearing bearing. The pressurized oil driving the power unit is led to the power unit via pipelines (10).

Figure 2 shows how the pieces of blades fixed to the surface of the drum (1) at regular intervals along a helical path 30 are lowered as the string of blades approaches the edge of the drum.

Figure 3 shows a blade piece (27) with a pivot pin attachment (28), (29), of which the portion (30) is sharpened. The bending angle α of the blade piece is such that when the drum (15) of the device (25) is in the most preferred cutting position at an angle β to the stump (14), the sharpened portion (30) of the blade piece (27) is horizontal in the cutting position The bending angle of the blade piece (27) is thus α = 90 ° - (3.

In Fig. 4, the body of the device for crushing the bases to be attached to the implement is formed by a housing (25) which is attached to the implement by means of lugs (22). The drum (15) only rotates on the bearing of the power unit (17). The power unit (17) is fastened at one end by screw fastenings (19) to a circular end protrusion (18) connected to the wall of the housing body (25). The transmission to the drum takes place by means of a shaft (21) on which a hub piece (24) is fitted, which is connected to the circular support plate (16) of the drum (15) by screws (23). A bucket (26) is fitted to the device, which is used to transfer and retrieve the soil. A pressurized oil is passed along the pipes (20) to the power unit (17), the energy of which is converted into a rotational movement by the power unit.

In particular, it should be noted that the method according to the invention can also be used e.g. for crushing ice or for crushing and removing fresh fodder. Otherwise, it should be noted that the invention has been described above with reference to only two preferred embodiments thereof. However, it is not intended to limit the invention in any way, but many modifications are possible within the scope of the inventive idea defined by the following claims.

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Claims (4)

1. A method for - roaming stumps - transporting moss waste - leveling the soil surface by means of a planting device, which is fixed in a machine characterized by: - mashing stumps with a rotating and with edges (2), (27) equipped drum ( 1), (15) and - transporting and leveling soil or mashing waste with the bucket (13), (16) is carried out with the machine's supplementary device, which comprises a common frame (12), (25) for the bucket and drum. 2. Apparatus for realizing the aforementioned method characterized in that the frame (15), (25) of the attachment of the machine includes a bucket (13), (16) and a rotating drum (1), (15), which is equipped with edges (2), (27) mounted on its surface. 3. Device according to claim 2, characterized in that the edges (2) mounted on the drum surface on a helical path become lower as they approach the edges of the drum. 4. Apparatus according to claim 2, characterized in that the pA outer surface of the rotating drum (15) has been fastened by means of pivots (28,29) pivoting edges (27) which are L-shaped and sharpened by its cutting edge (30). and 1 which can retreat when hits or overloads occur, dA upon retrieval, the edges aim to tear and / or reject obstacles or wood and in this way reduce the torque requirement of the drum and that the bending angle a of the edges (27) is between 550-900. t