DE1557979A1 - Seed drill, in particular for attachment to agricultural tractors or work machines equipped with a power lift - Google Patents

Description

Gebr * E I 0 HER

Tractor and agricultural machinery works

' 8512 DinKolfing / Isar
Eicherstrasse 3

Seed drill, especially for attachment to agricultural implements or work machines equipped with a power lift «

The invention relates to a seed drill, in particular a seed drill to be attached to a power lift equipped agricultural tractors or working machines, with a seed box and a coulter bar on which the Shares are movably articulated,

Drills of the aforementioned type are known per se. In these known seed drills, the seed coulters are on the one hand via approximately vertically extending seed lines connected to the seed box, on the other hand via alternately longer and shorter coulter levers around one transverse to the direction of travel selling axis articulated movably on the coulter bar. Since the shares articulated in this way are on a circular path have to move around the coulter beam in order to get a clean To enable the seed drill to work and, above all, to enable perfect interaction between the seed coulters and the seed line, the coulter levers a certain minimum length

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point. To get an acceptable pace, must also alternate with respect to the minimum length having coulter levers longer coulter levers are used. Such a construction requires a certain minimum installation depth the seed drill, which essentially depends on the required length of the coulter lever and the minimum required Sharp step depends. Apart from the fact that an increase in the overall depth of a seed drill is inevitable is associated with an increase in material and labor, these seed drills, in particular, are liable insofar as they are used as so-called semi-trailers for attachment to agricultural towing machines equipped with a power lift Working machines are determined, furthermore the disadvantage that with increasing enlargement of the depth of the Seed drill whose center of gravity is further away from the linkage point of the power lift. This arises when growing on the power lift of the tractor is a longer lever arm between the pivot point of the power lift and the center of gravity of the seed drill, which must be compensated for by a correspondingly large amount of force on the tractor's power lift, so that under certain circumstances, due to the unfavorable mounting conditions, only to be able to raise and lower the machine, a stronger tractor must be used than would be required to work with the seed drill.

Another disadvantage of the known seed drills is that in view of a portable depth of the Machine the achievable share pitch cannot have the optimal width.

The invention is therefore based on the object of a seed drill of the type mentioned to create, which while avoiding the disadvantages of the known machines an optimal Design of the coulter step enables, and moreover with the least possible technical and constructive Effort can be produced.

This object is achieved according to the invention in that

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in a seed drill of the type mentioned at the outset, the coulter bar is arranged approximately in the middle under the seed box is and the shares alternate via pairs of links on support parts attached to the share beam via claws are hinged forward and backward. Through the central arrangement of the caterpillar * becomes on the one hand a more favorable center of gravity and, on the other hand, a larger and therefore more favorable plowing step achieved

In a preferred embodiment of the invention it is provided that the two links belonging to a link pair are each in a known manner arranged one above the other in the vertical plane and articulated to be movable about horizontal, spaced-apart axes are, the handlebars belonging to a pair in a manner known per se, of unequal length, the longer ones Handlebar at the shares leading to the share bar opposite above and at the ones that follow the coulter bar opposite Flocks are arranged below. Furthermore, the distance between the axes about which the handlebars are rotatably hinged to the Beam parts smaller than on the shares.

In an expedient embodiment of the invention it is further provided that the shares have a shaft rigidly connected to the share shoe _t on which the handlebars are rotatably articulated. In particular, the shafts of the coulter shoes are hollow and form part of the seed line.

According to a further feature of the invention, the share elevator two winding shafts arranged above the coulter bar and driven in opposite directions by interlocking gears on, which are connected to the lower link via elevator levers and coupling rods. There are those Coupling rods and the lower links with abutments, between which compression springs are arranged.

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Finally, there is another feature of the invention that the coulter bar is extended and stiffened at the bottom Transverse walls of the seed box is arranged, and has stub axles for receiving the bicycles of the machine.

The invention is described in the following example using an exemplary embodiment shown in the drawing described. In the drawing shows the

Figure 1 shows a section of a seed drill according to the invention in a rear view;

Figure 2 shows a section through a seed drill according to Figure along the line II-II.

The narrow sides of the seed drill are lengthened and stiffened by the transverse walls 1 of the seed box 2 formed, which carry a coulter bar 3 arranged centrally below a seed box. Are advantageous also · the longitudinal walls 6 of the seed box 2 stiffened. Bicycles 4 are on the narrow sides of the seed drill Scharbalken 3 attached stub axles 5 arranged. The coulter bar 3 itself has an approximately hat-shaped profile. On the coulter bar 3, the handlebars 8, 9 carrying carrier parts 10 are fastened by means of claw claws 7 ». The claws 7 exist each of a part 13 formed in one piece with the carrier part 10 and a clamping part 12, and comprise the edge 11 of the caterpillar 3

For fastening the claw 7 or the carrier part 10 On the coulter bar 3, the two claw parts 12, 13 are connected to one another or to the coulter bar 3 by means of a clamping screw, which consists of the bolt 14 connected to the claw part 13 and the basket nut 15, clamped. On the support part 10, the links 8, 9 are articulated so that they can rotate about horizontal axes by means of the joints 16, 17. The handlebars 8, 9 carry shares 18, which consist of a share shoe 19 and a shaft 20 rigidly connected to this. The shaft

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is hollow and represents part of the seed line. At the top, each of the shafts 20 is connected to an outlet funnel 21 of the seed box 2 via flexible seed line spacers 22. The links 8, 9 are articulated on the shafts 20 by means of the joints 23, 24 so that they can rotate about horizontal axes. As can be seen in particular from I ¹ XgUr 2, the shares are arranged on both sides of the share bar 3 opposite this alternately leading and trailing. In the case of the coulter bar 3, seen opposite in the direction of travel, the lower link 9 is shorter than the upper link .8. The upper link 8 also has a buckling which prevents the link 8 from coming to a stop prematurely on the coulter bar 3 when the coulter is pulled up.

In contrast to the links carrying the coulters leading opposite the coulter beam 3, the lower links 9 are longer than the upper links in the coulters carrying the coulters following the coulters 3 opposite. It can also be seen from FIG. 2 that the axes about which the lower and upper links are rotatably connected to the carrier part and one to the coulter are less distant from one another with regard to the articulation of the links on the carrier part than with regard to the articulation on the shaft connected to the coulter. The coulter lift takes place by means of winding shafts 25, 26 arranged above the coulter bar 3, which are driven in opposite directions by intermeshing gears 27, 28 and to which the lift levers 29 are rigidly connected. With the elevator levers 29 connected via joints 31 push rods 30 act on the lower links 8 that when the push rods 30 move upward via drivers 32 in the sense of lifting the shares and with a downward movement of the push rods 30 via compression springs 35 abutment 33 and. Recordings 34 - in the sense of lowering the coulters, can be adjusted.
The lowering depth of the coulters can be adjusted with one of the

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the gears driving the winding shafts in mesh stationary gear 36, which by means of a crank 37 adjustable is to be set.

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Claims (11)

PAiEENgAMSPRUOHE ι 1. Seed drill, especially for attachment to a power lift equipped agricultural tractors or working machines, with a seed box and a ßcharbalken to which the coulters are movably articulated, characterized in that, that the coulter bar (3) is arranged approximately in the middle under the seed box (2) and the coulter (18) Via pairs of links (8, 9) on carrier parts (10) fastened to the coulter bar (3) with claws (7) alternately are hinged at the front and back. 2. Seed drill according to claim 1, characterized in that that the two links belonging to a link pair (8, 9) in a manner known per se, each in a vertical position Level are arranged one above the other and around horizontal, axles arranged at a distance from one another are movable. 3. Seed drill according to Claims 1 and 2, characterized in that that the links (8, 9) belonging to a pair are of unequal length in a manner known per se. 4. Seed drill according to claims 1 to 4, characterized in that that the longer handlebars at the coulter bar (3) opposite the coulter (18) above and at the the coulter bar opposite trailing coulter (18) are arranged below. 5. Seed drill according to claims 1 to 4, characterized in that that the distance between the axes on the support parts (10) is smaller than on the shares (18). 6. Seed drill according to claims 1 to 5 »characterized in that that the shares (* T8) one with the share shoe (19) have rigidly connected shaft (20) to which the links (8,9) are articulated. -.'..-. 009820/0044 New documents 1557973 7. seed drill according to claims 1 to 6, characterized thereby. shows that the shafts (20) are hollow and form part of the seed line. 8. seed drill according to claims 1 to 7, characterized in that that the coulter lift is two above the coulter bar (3) arranged by interlocking gears (27,28) has oppositely driven winding shafts (25, 26), which via winding levers (29) and coupling rods (30) are connected to the lower links (9). 9. Seed drill according to claims 1 to 8, characterized in that that the coupling rods (30) and the lower Handlebars (9) have abutments (33,34), between which compression springs (35) are arranged. 10. Seed drill according to claims 1 to 9, characterized in that that the coulter bar (3) on the downwardly extended and stiffened transverse walls (1) of the seed box (2) is arranged. 11. Seed drill according to claim 10, which is equipped with a chassis, characterized in that the coulter bar (3) has stub axles (5) for receiving the bicycles (4). 0 09820/0044 . 9- Blank page