CA1121217A

CA1121217A - Seed drill

Info

Publication number: CA1121217A
Application number: CA000355573A
Authority: CA
Inventors: Heinz Dreyer
Original assignee: Amazonen Werke H Dreyer SE and Co KG
Current assignee: Amazonen Werke H Dreyer SE and Co KG
Priority date: 1979-08-01
Filing date: 1980-07-07
Publication date: 1982-04-06
Also published as: DE2931133C2; DE2931133B1

Abstract

ABSTRACT OF THE DISCLOSURE

A seed drill having a storage tank and holders adapted to pivot about axes running at right angles to the direction of travel, the holders comprising at least two vertical carriers arranged alternately in two transverse rows located one behind the other, each of the carriers comprising a laterally closed cavity into which the seed conducting tubes, running down from the storage tank, open, the lower part of each carrier, equipped with at least one outlet aperture, comprising a rotatably mounted single disc share, characterized in that the lower ends of the seed conducting tubes are attached to the inlet connections which are located on the lower part of the vertical carriers and which are directed obliquely forwardly or rearwardly upwards.

Description

The invention relates to a seed drill having a storage tank and holders adapted to pivot about axes running at right angles to the direction of travel, the said holders comprising at least two vertical carriers arranged alternately in two transverse rows located one behind the other, each of the said carriers comprising a laterally closed cavity into which the seed conducting tubes, running down from the storage tank, open, the lower part of each carrier, equipped with at least one outlet aperture, comprising a rotatably mounted single disc share.
A seed drill of this kind is already known from U. S.
patent 3,705j,560. This machine is characterized in that even when the rows are close together, for the purpose of sowing corn seeds, the spaces between the shares are so wide that even when the machine is used for direct seeding, they cannot become blocked by residual vegetation from t'ne previous harvest.
Furthermore, the seed guide running in the cavities in the vertical holders is protected in the seed furrows produced by the single disc shares in such a manner that, as far as the ~o outlet apertures located in the carriers, this guide cannot -~
be damaged even in rocky ground.
The disadvantage of this known seed drill, however, is that the laterally closed cavities extend over the entire length of the vertical carriers, and the seed conducting tubes open into the upper ends thereof. This means that the seed drill must be high in order to ensure satisfactory guidance of the seed in the seed conducting tubes. Above all, this height makes it extremely difficult to fill the storage tank.
Furthermore the centre of gravity of the machine is so high that, for this reason alone, the use of the machine in con-touring a slope presents problems and accurate matching of adjacent operating paths is no longer possible.

LZ~7 It is therefore a purpose of the present invention to improve this known seed drill in such a manner that is will retain the above mentioned advantages, but will be lower and will have a lower centre of gravity.
According to the invention, this purpose is achieved in that the lower ends of the seed conducting tubes are attached to inlet connections which are located at the lower part of the vertical carriers and which are directed obliquely forwardly or rearwardly upwards. This arrangement not only eliminates, from the overall height of the machine, the vertical distance between the upper ends of the carriers and the inlet connections, but also saves height because the seed conducting tubes can be attached in a straight line to the inlet connections, without additional bending.
The invention is illustrated by way of example and explained hereinafter in greater detail, with the additional characteristics set forth in the sub claims, in conjunction with the drawings attached hereto, wherein:
Figure 1 shows a rear holder of a single disc share according to the invention, in longitudinal section through the vertical carrier;
Figure 2 is a side elevation of the holder shown in Figure 1, Figure 3 is a view from the rear of a further design of vertical carrier.
Holder 1, shown in Figures 1 and 2, comprises two hinged arms 2,3 arranged at a distance Z apart in a vertical plane, and running parallel with each other, with vertical carriers 4 hinged to the rear ends thereof. Lower part 5 of each carrier is equipped with a cavity 6 which is defined, on the side facing lower hinged arm 3, by carrier 4 and is also enclosed laterally by sheet metal casing 7. Located at the

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upper end of carrier 4, at its junctio~ with upper arm 2, is a pin 9 running at right angles -to the direction of travel 8, whereas a bearing pin 10, also running at right angles to the direction of travel, is welded to the lower bearing on arm 3.
Bearing pin 10 passes through bearing element 13 which traverses cavity 6 and is welded to lateral walls 11,12, spring cotter plns being provided to secure carrier 4 axially on pins 9 and 10.
This provides a stable hinged arrangement of vertical carrier 4 on arms 2 and 3, which can also absorb heavy lateral loadsO
Located at lower part 5 of carrier 4 is a forwardly projecting holder par-t 15 upon which single disc share 16 is mounted to rotate freely. Also fitted to lower part 5 of carrier 4 is a rearwardly projecting holder part 17 upon which there rotates freely a pressure roller 18 used to close and compress seed furrow 18 produced by share 16. Again located upon lower part 5 of vertical carrier 4 is inlet connection 20 which projects obliquely forwardly and upwardly and is welded to front defining wall 21 of cavity 6. Seed conducting tube 20 is connected, by means of a clip 23, to the upper end of connection 20, the said tube, which is not shown, running in a manner known per se downwardly from the storage tank of the machine.
Depending upon the position of the storage tank in relation to vertical carrier 4, an inlet connection running obliquely to the rear and upwardly may be provided, as shown in broken lines. It is also possible to equip lower part 5 of ver-tical carrier 4 with two inlet connections 20,24, thus making it possible to use a standard carrier 4 regardless of the position of the .storage tank on the machine.
In order to ensure a reliable flow of seed, fed to cavity 6, into seed furrow 19 produced by single disc share 16, lateral wall 11, facing away from share (16), of the said ; ~3~

cavity is equipped with a plate 25 running obliquely downwards towards the said share. In this connection, outlet aperture 26 in lower part 5 of vertical carrier 4 is located in lateral wall 12 facing share 16. Finally, the lower end of plate 25 is at a lateral distance A of at least 15 cm from sha,e 16.
This allows the seeds to fall into seed furrow 19 unimpeded by share 16 or by any residual vegetation lying upon the ground.
The example of embodiment illustrated in Fig. 3 differs from that described hereinbefore merely in that lower part 5 of vertical carrier 4, which comprises cavity 6, consists of a casting 27 which is fitted detachably, by means of screws a8, and ring nuts 29, to upper part 30 of vertical carrier 4.

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Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:-

1. A seed drill having a storage tank and holders adapted to pivot about axes running at right angles to the direction of travel, the said holders comprising at least two vertical carriers arranged alternately in two transverse rows located one behind the other, each of the said carriers comprising a laterally closed cavity into which the seed conducting tubes, running down from the storage tank, open, the lower part of each carrier, equipped with at least one outlet aperture, comprising a rotatably mounted single disc share, characterized in that the lower ends of the seed conducting tubes (22) are attached to the inlet connections (20,24) which are located on the lower part (15) of the vertical carriers (4), and which are directed obliquely forwardly or rearwardly upwards.

2, A seed drill according to claim 1, characterized in that the laterally closed cavity (6) extends only over the lower part (5) of each vertical carrier (4) and is otherwise enclosed in a sheet metal casing (7).

3. A seed drill according to claim 1, characterized in that the laterally closed cavity (6) constitutes the lower part (5) of the vertical carrier (4) and is in the form of a casting (27) fitted to the upper part (30) of the said carrier.

4. A seed drill according to claim 2, characterized in that the lateral wall (11), facing away from single disc share (16), of the cavity (6) is equipped with a plate (25) running obliquely downwards towards the single disc share (16), and in that the outlet aperture (26) in the said cavity is located in the lateral wall (12), facing the said single disc share, of the said cavity, and adjoins the plate (25) running upwardly.

5. A seed drill according to claim 3, characterized in that the lateral wall (11), facing away from single disc share (16), of the cavity (6) is equipped with a plate (25) running obliquely downwards towards the single disc share (16), and in that the outlet aperture (26) in the said cavity is located in the lateral wall (12), facing the said single disc share, of the said cavity, and adjoins the plate (25) running upwardly.

6. A seed drill according to claims 4 or 5, character-ized in that the lower end of the obliquely running plate (25) is at a lateral distance (A) of at least 15 cm from the relevant single disc share (16).

7. A seed drill according to claims 1, 4 or 5 wherein the holders comprise hinged arms arranged, spaced apart, in a vertical plane and running at least approximately parallel with each other, the vertical carriers being hinged to the rear ends of the said arms, characterized in that the bearing element (13) for each lower arm (3) is located in the lateral walls (11,12) of the cavity (6), the bearing pin (10) being welded to the said lower arm (3) and projecting through the said cavity.