Seed drill

The invention relates arranged with a to a frame of the seeder, two juxtaposed Scheibenschare having openers, the disc coulters are arranged on intersecting axes such that extend divergently upwards and backwards and receive a seed tube between to a seeder for sowing ,

It is a seed drill of the kind mentioned at the outset is known, the two with juxtaposed grooves opening a device having a V-shape mutually aligned disc coulters, which are rotatably mounted on intersecting axes. A seed tube of sowing device that provides storage for seeds in a furrow is arranged between the two intersecting axes of the disc coulters and their outer rear ends (US Patent 4,009,668). Since the lower end of the Saatrohres is also bent nor rearwardly, the seed is dispensed into the furrow at a location that is relatively wide at the portion of the groove that is formed in the region of the extreme bottom position of the disc coulters. This light is the possibility that Undocked seed not lie remains, but either jumps again or continue to run backwards, so that a uniform distance is not guaranteed.

In contrast, the invention has the object to form the seed drill or the relevant seed pipe and so as to ensure that proper discharge of the seeds into the furrow is possible without that after placement of the seed takes place a further movement of the seed. This object has been achieved in that the seed tube extending between the front roughly adjacent edges of the disc coulters and the axes of the disc coulters and its discharge end extends into the vicinity of the lower outer part of the disc coulters right behind the axles. Due to the advantageous arrangement and guidance of Saatrohres the seed at a location in the furrow is stored, which is relatively narrow so that a high jump or continuous rolling of the seed is excluded since and due to the relatively closely aligned side walls of the groove between the seed of the side wall, a friction resistance is generated, which prevents a further movement of the seed. To this end, it is according to the invention advantageous that a front spacer strut is mounted on the frame of the sowing device in the area of ​​the discharge end of Saatrohres provided between the adjacent edges of the disc coulters and the intersecting axes of the disc coulters, and daßridie front spacer strut laterally or horizontally having in the area of ​​the opposed side surfaces of the disc coulters extending flanges. It is also advantageous that a rear spacer strut is mounted on the frame in the area of ​​the discharge end of Saatrohres provided behind the intersecting axes of the disc coulters, and that the rear spacer strut laterally or horizontally of the area of ​​the opposed side surfaces having Scheibenschare extending flanges. The use of spacer struts allows precise guidance and alignment of the disc coulters, and at the same time they can help to remove the adhesive on the surface Erdgut of the disc shares again because the associated flanges of the spacer struts rest against the side surfaces of the disc coulters. Further, it is advantageous that. the discharge end of Saatrohres is disposed between the front and rear spacer strut. By placing the Saatrohres between the spacer struts a good and simple support for the lower end of Saatrohres is created, and at the same time it is possible to be forming the seed tube in the area where through the disc coulters the formed furrow is still most closely.

In the following the invention is explained in detail with reference to only one embodiment illustrative drawings. It shows:<ul><li>Fig. 1 is a perspective view of a seeder, with a part of the sowing device is cut away for better illustration of the Säorganes,</li><li>Figure 2 is a side view of the seeder along the line 2 -.. 2 shown in Figure 1, wherein the position of Saatrohres and the lower discharge end of Saatrohres with respect is shown on the axis of the disc coulters,</li><li>Figure 3 is a plan view taken along line 3 -.. 3 according to Figure 2, with parts of the disc coulters are cut away to illustrate the connection of the disc coulters of the frame,</li><li>Fig. 4 shows the lower part of the disc coulters with the discharge end of the Saatrohres,</li><li>5 is a sectional view taken along line 5 -.. 5 according to Fig 2 and the groove formed in the vicinity of point B where the seed will be placed.</li></ul>

In the drawing, 10 is a sowing device called the parallel link 12 comprises that for the sake not shown Seeders pivot vertically combine a frame 14 of the sowing device 10 to the main frame in the drawing for simplicity. By means of the parallel arm, each individual sowing device be adjusted vertically relative to the adjacent sowing device.

The frame 14 is supported on two adjustable ground wheels 18 on the floor by means of which the depth of the furrow or the disc coulters is 20 determined. For this purpose, corresponding actuator arms 19 are provided (Fig. 2). Two juxtaposed disc coulters 22 forming the Zudeckvorrichtung and are connected for this purpose adjustable by means of a support on the frame fourteenth The disc coulters 22 act on the surface and sides of the groove, so that this is covered by means of the disc coulters and thus covers the seed.

The upper part of the frame 14 has a sump 24 for fertilizers with a dosing device 26 and a collection container 28 for seeds with a dosing device 30th Both metering devices 26 and 30 are jointly driven via a main drive device, not shown in the drawing. The dosage device 30 is driven via the main drive device, to control the discharge of the seed from the collection vessel 28 so that it from the collecting tank 28 via a seed tube 32 and its discharge end 34 in a groove 36 passes (Fig. 2).

As is apparent from Fig. 3, the disc coulters 20 for opening of the grooves on a respective axle 21 are rotatably supported, wherein the two axes are arranged convergent to each other so that their axes intersect with one another. The disc coulters run backwards and upwards apart and thus obtain a V-shaped arrangement of the sectional view in FIG. 5. A front spacer strut 38 has laterally on extending flanges 40, which are connected to the frame 14 and immediately before the axes intersecting 21 of 20 disc coulters are. In this case the flanges 40 adjoin at the opposite end faces of the disc coulters 20 at. A rear spacer strut 42 is on the axis 21 of the disc coulters 20 included 14 attached to the frame. The spacer strut 42 has laterally extending plates 44 which lie between the opposite ends of the disc coulters 20th The spacer strut 38 and the spacer strut 42 serve as scraping elements and thereby prevent soil becomes fixed on the inner sides of the disc coulters 20th They also prevent the disc coulters be adjusted or bend when working in very hard soil 20th

As is apparent from Figures 2 to 4, the seed tube 32 is bent downward and backward so that the seeds 50 on leaving the Saatrohres 32, an acceleration pulse is given to the rear. The rearward velocity component of the seeds 50 compensates for the speed of travel of the seeder, so that the seed 50 with respect to the ground, a relative velocity is imparted. The seed is placed at a location just below and behind the output of the discharge end 34 of Saatrohres 32 in the furrow 36th As best seen from Figures 2 and 3, the seed tube 32 extends downward below the intersecting axes 21 of the disc coulters 20, wherein the discharge end 34 of Saatrohres 32 something is on the axis 21 of the disc coulters 20th As shown in FIG. 2, while the seed tube extends 32 between the spacer strut 38 and the spacer strut 42.

Precise placement of the seed 50 in the groove 36 results from Figures 4 and 5. The through the discharge end 34 of Saatrohres 32 out passing crop 50 falls as shown by arrow in the groove, the effective speed component is approximately zero. Thus, the seed reaches 50 immediately below the discharge end 34 at a point b in the furrow. The point b is located just behind the intersection of the axes 21, namely there where the groove 36 has its maximum depth. As seen from

Figures 4 and 5 is apparent, the furrow at the position b is relatively narrow and has a relatively vertically extending side walls. The placement of the seed 50 at b prevents leaping and rolling of the seed at the moment of delivery, because the seed entered between the relatively steep side walls can not jump or roll further due to the relatively steep side walls of the groove, because the side walls a corresponding cause friction. From Figures 4 and 5 also shows that the delivery of the seed 50 between points a and b is so long desired, until the groove 36 has reached its maximum depth. A delivery of the seed 50 between points b and c leads to increased popping or continuous rolling of the seed as the furrow 36 is increasingly in the direction of c and the side walls of the groove 36 are formed progressively shallower. Accurate alignment of Saatrohres 32 results in accurate dispensing of the seed 50 in the groove 36 and thus ensures that the seed does not jump or rolls on. This optimal storage and thus an optimum germination of the seed is ensured.