DE29511395U1 - Direct seeder - Google Patents

Description

DUTZI SOIL CULTIVATION

25 June 1995 /ks Description

The invention relates to a direct seed drill for sowing various crops.

In patent application P4439441.1, such a direct sowing method (1) has been proposed, which enables simple, inexpensive sowing without prior soil or stubble cultivation. This involves a two- or multi-row cultivator (3) that forms the seed furrows in the soil, places the seed in the furrows and places the soil thrown up by the cultivator shares as fine soil to cover the furrows or seeds behind the machine using a tool rotor (4). The cultivator with the tool rotor is guided by the feeler wheels (6) to adapt to the soil. To vary the sowing depth, the height of the cultivator (3) together with the tool rotor (4) is adjusted by adjusting the holder (5). The feeler wheels can be arranged either in front of the cultivator (like 6) or behind the cultivator (7). Instead of the feeler wheels (6, 7), a roller of various designs (8) can also be coupled. The cultivator, rotor and feeler wheels unit is pulled by a parallelogram (9) from the support frame (10) on support wheels (11), for example by a tractor (12). A seed tank (not shown) is carried by the support frame (10).

The process works reliably. If there are unusually large amounts of organic matter on the ground, e.g. due to extremely poor distribution of the straw chopped by the combine harvester, it can be useful to protect the machine in a suitable way against blockages that the tool rotor alone cannot prevent or clear. Experience has shown that blockages can be reduced if the machine is as free as possible in front of the cultivator. This can be achieved by omitting the feeler wheels at the front, so that the depth control behind the cultivator is carried out by feeler wheels (7) or roller (8). The support wheels (11) can also be omitted if the support frame (including seed tank) is carried by the tractor using a three-point attachment (13). Any increased movements between the cultivator and the support frame that may occur as a result are compensated for by the parallelogram (13).

Furthermore, it proved to be unfavourable that the working depth of the tool rotor (4) depends on the

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The quality of work is impaired by the fact that at greater sowing depths the tool rotor also works below the surface of the earth and has to move significantly more earth than is necessary. In addition, the power requirement increases unnecessarily.

It is the object of the invention to further develop the generic device in such a way that:

- the blockages described above can be excluded even under adverse field conditions and

- the tool rotor works independently of the sowing depth.

The blockages described can be eliminated according to the invention if the organic mass lying on the ground and still rooted is chopped up before entering the area of the cultivator and thrown at high speed between the cultivator's share shafts behind the machine. This prevents the mass from bridging (beginning of a blockage) in front of and between the cultivator's share shafts (3). Such a crushing and acceleration is possible with a high-speed mulching blade rotor (14).

Another advantage is provided by the use of a mulching blade rotor (14): For some types of crops, it is necessary to shred the organic mass for plant protection reasons, so that, for example, plant pests do not multiply. In addition, the mulching blade rotor contributes to an even more even seed coverage behind the machine.

In order to make maximum use of the high throwing speed, the mulching blade rotor (14) must be installed as close to the cultivator as possible. This is possible if it is directly connected to the cultivator frame (3). To adapt to the working conditions, it should be height-adjustable on the cultivator frame. The mulching blade rotor (14) works both with and without the tool rotor (4). Using both rotors together offers the advantage that the shredded organic mass mixes intensively with the fine soil produced by the tool rotor and together evenly covers the seed behind the machine.

The dependence of the working depth of the tool rotor (4) (and the mulching blade rotor (14) described above) on the sowing depth is, as described above, a disadvantage. This is eliminated according to the invention by a

Cultivator (3') separated from the tool rotor. This cultivator (3') is now accommodated by another frame, the intermediate frame (2). The intermediate frame is like the cultivator (3) with the parallelogram

(13), holds the tool rotor (4) firmly in the frame and is carried in the working position by the feeler wheels (6 or 7) or roller (8). The mulching blade rotor (14) is also attached to the intermediate frame. The cultivator is held in place, for example, at the front by support and tension bolts (15) with tension nuts (16) and at the rear by the support bolt (17). The bolts (15) and

(17) can each be guided in perforated plates (18) arranged to the side. Transverse bolts for locking the tension and support bolts (15 and 17) can be inserted through the holes in these perforated plates. In this special embodiment, the sowing depth adjustment of the cultivator (3 ^! ) in the intermediate frame is possible within the range specified by the design of the perforated plates (18) by means of the distribution and number of their holes. This means that the working depth of the tool rotor and mulching blade rotor is independent of the sowing depth. However, the working depths of both rotors can be adjusted separately by changing the length of the rear feeler wheel holders (5 ¹ ) or the roller holders {5' ¹ ), as well as individually by taking into account the height adjustability of the mulching blade rotor on the intermediate frame (2).

The invention is explained below using the sketches. They show:

Fig. 1. Direct seed drill as described with feeler wheels at the front and alternatively possible feeler wheels or roller at the rear.

Fig. 2. Direct seed drill as Fig. 1, but with separate cultivator in the intermediate frame and without feeler wheels at the front.

Fig. 3. Direct seed drill as Fig. 2, but without support wheels, support frame is carried by the tractor, as well as with tool rotor and mulching blade rotor.

Fig. 4. Direct seed drill as Fig. 3, but without tool rotor.

Claims (5)

, DUTZIBODENBEAIIBEiTyii.'G: 25 June 1995 /ks Protection claims: 1. Direct sowing machine for sowing various crops by means of a two- or multi-row cultivator for drawing narrow seed furrows in the soil, without prior soil cultivation, and placing the seeds in the seed furrows and evenly covering the seeds with the fine soil thrown up by the cultivator and distributed by the tool rotor, characterized in that a high-speed mulching blade rotor is arranged directly in front of the cultivator. 2. Device according to claim 1, characterized in that the mulching blade rotor is attached to the cultivator in a height-adjustable manner. 3. Device according to claim 1, characterized in that the cultivator is arranged in the intermediate frame so that it can be adjusted in height, independently of the presence of the mulching blade rotor, separate from the feeler wheels and tool rotor. 4. Device according to claim 3, characterized in that the mulching blade rotor is attached to the intermediate frame in a height-adjustable manner. 5. Device according to claim 1, 2 and 4, characterized in that the mulching blade rotor can also be used without the tool rotor. RDZ D ut &zgr; i G ITfVH .»* .1,Ji* d _# ii st { i ^e !,tr sJSjel,; D-76698 Ubstadt-Weiher/Zeutern