DE443363C - Device to facilitate the adjustment of the Saewellenvorlage in Sae and seed drills - Google Patents

Description

A seed drill only works satisfactorily if it is suitable for a unit of area outputs the required amount of seed as precisely as possible. As is known, the amount of sowing will be determined by the different speed of the seed wheels or other seed output organs, and the seed drills for this purpose are arranged to have a large number of different rotational speeds of the

ίο Allow seed wheels etc. For this purpose, the The seeding shaft is driven by a wheel of the seed drill through a back gear with a change gear. This again results in the difficulty of finding the gearbox of the countershaft in each case set, whereby it should be noted that such machines are technically uneducated People used to be served.

So far, the supplying factory has always had a so-called buyer of a seed drill

ao sowing table given, from which the setting the gearbox for sowing a certain amount for the unit area could be accepted. When using such tables by untrained personnel but it was easy to make mistakes; besides, it is in the nature of things that such sowing tables only give very approximate stopping points

/ can, especially since the seed drills have the same dimensions η of the seed rate among themselves usually do not match exactly.

Proposals have already been made to attach pointer devices to the seed drill itself. However, one of the proposals was not about a machine through one Countershaft or change gear to be driven seed wheels, but around a so-called seed kettle, from which the seed was directly fed to the individual seed ladders. here Was it just a matter of adjusting the individual output openings of the kettle but also able to employ experienced farmer appropriately with a sense of proportion.

Another suggestion was based on the idea of a counting device on the machine through which the sown area is to be displayed. From the acceptance the amount of seed in the seed box and from the position of the counting device should then be a Conclusion to the more or less correct working of the machine can be drawn. The counting device was designed in two parts, it consisted of a disc with graduation and one on this rotating pointer. In order to rule out incorrect displays when negotiating bends, the two parts were rotatable, namely the disk of the one and the

Claims (1)

443368 Pointer from the other wheel of the seed drill, both in opposite directions, of course Directions, rotated. According to the invention, it is based on the idea of making the so-called basic test, which is initially carried out with every seed drill, as the starting point for the setting of the countershaft change gear to be made. If Q ^{1 is} the sowing quantity at a ίο sowing shaft speed F ¹ and if Q ² and F ^{2 are} the relevant quantities at a different speed, the proportion Q ¹ to F ¹ applies as <2 ² to F ² . The new device is now set up so that, after the Relationship of the machine in question between the speed of the sowing shaft and the output quantity is established, a one-time setting of the device according to the result of this trial takes place, whereupon the setting of the additional gear for on a scale of the device all other dispensed quantities can be easily read off. The new facility is very simple type, it consists only of two mutually adjustable scale carriers, expediently in disc form, with one scale the sowing rates, the other the Contains sowing shaft speeds; this is useful in order to avoid sources of error for the farmer As far as possible, designations on the scales that correspond to the designations used for the machines are used to adjust the handles for the additional gear. To these adjustable against each other A third, again adjustable part is then expediently added to the scale supports, which contains a window through which only the dimensions of the two scales that belong to one another are visible. An exemplary embodiment is shown in the drawing. Fig. Ι shows a section,
Fig. 2 a floor plan,
Fig. 3 shows an example of a speed diagram for a seed drill. The diagram shows that the Setting options are plotted, while the vertical shows the speed ratios contains the sowing shaft with respect to the rotation of the driving bicycle. The embodiment is based on the circular shape of the device, the execution but can also be done differently, e.g. B. in the form of a ruler or rod. Two circular scale carriers α and δ are connected by a central screw d and can be clamped against each other by the nut ^ ^1. If necessary, other means can also be used to determine the two parts α and b. The two panes α and δ are encompassed by a ring c which is U-shaped in cross section and which contains a window i which is expediently T-shaped as shown in FIG. The narrow slot of the window shows (in the example c ⁵ ) a point on the scale of the disk δ, in the extended slot, on the other hand, a few points on the scale of the disk a. On the disks α and δ, tabs e and f are also bent out, which serve as a handle to facilitate the mutual rotation of the disks a and δ for their adjustment. These flaps can be replaced by other parts of any kind, they can also be completely absent. A section g with pointer tip g ¹ (Fig. 2) is also provided in disk δ so that you can constantly check whether the disks that have been set have not shifted against each other by chance. If an experiment is first carried out in the known manner and it is found here according to Fig. 2 that in order to achieve a seed quantity equal to 45 for a certain area unit, the lay-up for the sowing shaft ^{must have the setting c 5} , the device is due to the above-mentioned proportion for all other sowing rates are set. If approximately a sowing amount equal to 65 is to be achieved, the ring c is turned so far that the window is above the number 65 of the disc α ; The appropriate setting of the additional gear then appears on the disc δ in the narrow part of the window. The application of the device is independent of the type of seed used the seed wheel and the size and number of rows of the machine. The scale division is expediently carried out in such a way that the disc α is given a logarithmic scale from approximately 1 to 10 approximately twice, and that the scale is also set in such a way that the quantities in question during sowing can be read off without further ado; the numbers from 5 to 500 would come into consideration for this. The disk δ then contains the speed ratios in the same logarithmic scale as the disk α. Ρλ τ ε ν τ λ ν sj ru c η: Device to facilitate the setting of the seeding shaft back gear for sowing or Seed drills, characterized by two scale carriers that can be adjusted and locked against each other, on which a cover slide with a window for the two scales can be slid rests. 1 sheet of drawings.