DE1182891B - Cleaning device for threshing machines and combine harvesters - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN ■

PATENT OFFICE

EDITORIAL

Boarding school KI .: AOIf

German class: 45 e- 7/44

Number: 1182 891

File number: E 24960III / 45 e

Filing date: June 7, 1963

Opening day: December 3, 1964

To meet the need for a better cleaning of the fruit or for a better separation of the To keep up with fruit and chaff in the sieve box of a combine harvester has already been proposed to increase the capacity of the cleaning stage through particularly large sieve areas. But since the The performance of the sieve box is only optimal if the entire sieve surface is exposed to the wind flow with the Sieve surfaces interacting pressure wind turbine is coated equally well, is either the enlargement the screen areas are set such a limit that they do not provide a satisfactory improvement brings, or the performance of the pressure wind turbine must be increased. Particular difficulties occur when it comes to cleaning wet, matted mixtures of husks, short straw and grains, since a considerable change has been made to the threshing machines so far an enlargement of the sieve area and the fan had to be made. Larger sieve areas that too result in a larger screen box, and a larger pressure wind turbine, however, make the production more expensive of the combine harvester significantly.

It is also known to use rakes or sieves, e.g. B. nasal sieves, upstream of the sieve box, which are rigidly connected to this. For example, it has been suggested the shelf, a finger rake and the adjustable lamellar sieve of the cleaning device for combine harvesters to be installed in a narrow, lightweight frame and this To set the frame in oscillating or shaking movements. The finger rake and the lamellar sieve are swept by the cleaning wind stream. These known designs already result in an improvement the grain excretion, which is increased even further according to the invention. In particular the invention also solves in an effective manner the mentioned problem of cleaning wet and matted mixtures of grains, chaff and short straw. The invention consists in that at a Cleaning device for threshing machines and combine harvesters, the shaking or rocking movements executes and has a drainage base on which the threshing mechanism, possibly also the Mixture of grains, chaff and short straw that accumulates from the shaker arrives according to the invention for Loosening up the mixture conveyed via the drainage floor in continuation of the conveying path is arranged up and down swinging, blown by the cleaning wind stream rake or sieve part.

Cleaning device for threshing machines thanks to the rake swinging up and down
and combine harvesters

Applicant:

Epple-Buxbaum-Werke Aktiengesellschaft, Wels (Austria)

Representative:

Dipl.-Ing. K.-A. Brose, patent attorney,

Pullach (Isar Valley), Wiener Str. 2

Named as inventor:

Hans Tanzer, Marchtrenk (Austria)

Claimed priority:

Austria of March 7, 1963 (A 1799/63)

or the sieve is the grain-chaff mixture flowing in a strong current before it hits the upper sieve Sieve group arrives loosened up in such a way that a large part of the light chaff particles are immediately affected by the pressure wind is captured and blown out. As a result, there can be an effective in the front part of the upper sieve Precipitation of the grain take place, and it is thus unchanged in its dimensions with the Upper sieve achieves a higher sieving capacity than with an extended sieve or a Sieve with rigidly connected rake.

The computing part expediently extends over the beginning of the upper sieve, and the distance between the Rake tines among each other become larger in the conveying direction. The sieve part can also extend over the Extend the beginning of the upper sieve and be provided with sieve openings of different sizes.

This ensures that only grains and grains above the drainage floor through the rake or the sieve small pieces of chaff can fall and reach the top sieve.

An exemplary embodiment of the subject matter of the invention is shown schematically in the drawing.

Fig. 1 shows in longitudinal section the screen box of a combine harvester and one upstream of the screen group Rake,

Fig. 2 shows a section along the line II-II in A b b. 1 and

A b b. 3 shows the rake in plan view on an enlarged scale.

409 730/91

According to A b b. 1 is a rake swinging up and down above the sliding plate 1 of the drain tray 2 3 is provided, which extends over the upper sieve 4 of the sieve group 6 arranged in the sieve box 5 and lies in the area of the wind flow blown from the pressure wind turbine 7. The swinging up and down the rake is caused by the back and forth movement of the sieve box in the direction of the arrow. For this purpose, the rake according to A b b. 1 and 2 an axle 8 mounted in the sieve box 2 the ends of which protrude beyond the sieve box and one end of which is fastened by levers 9. These are with their other ends on the only partially shown frame of the mower provided bolts 11 articulated, which engage in elongated holes 12 arranged on the levers, so that a vertical Vibration of the rake is possible. So that the axis 8 the reciprocating movement of the Sieve box can participate, corresponding cutouts 13 are provided in the frame 10 (A b b. 2). When the sieve box moves back and forth, it takes the axis 8 of the rake 3 and with the lever ends attached to the axle, whereby the lever 9 is pivoted about the bolts 11 and the rake is swiveled up and down to loosen up the grain-chaff mixture.

The rake is like from A b b. 3 can be seen, alternating with short tines 14 and long tines 15 provided. The short tines only reach over the sliding plate 1 of the drain tray 2 and the long ones The prongs over the sliding plate up to the top sieve 4. This is the distance between the prongs from each other over the sliding plate smaller than over the top sieve, so that only grains and small chaff fall onto the sliding plate and reach the top sieve. Instead of the rake, a Sieve can be used, which has a smaller mesh size than in the area of the sliding plate above the top sieve.

Claims (3)

Patent claims: 1. Cleaning device for threshing machines and combine harvesters, the shaking or swinging movements executes and has a drainage base on which that from the threshing mechanism, possibly also that from the shaker Mixture of grains, chaff and short straw arrives, characterized in that for loosening the over the drainage floor (2) conveyed mixture in continuation of the conveying path an up and down oscillating, from Cleaning wind stream is arranged through rake or sieve part (3). 2. Apparatus according to claim 1, characterized in that the computing part (3) is up extends over the beginning of the upper sieve (4) and the distance between the rake prongs (14,15) becomes larger in the conveying direction. 3. Apparatus according to claim 1, characterized in that the sieve part (3) extends over extends the beginning of the upper sieve (4) and provided with sieve openings of different sizes is. Considered publications:
German patents No. 908 080, 941 457,
851.1121873;
German interpretative document No. 1 069 418. 1 sheet of drawings 409 730/91 11.64 © Bundesdrudrerei Berlin