DE1122756B - Threshing device, especially for combine harvesters - Google Patents

Description

The invention relates to a threshing machine, particularly for combine harvesters, having one of an arcuate shape Concave surrounded threshing drum and an adjoining, higher lying and in opposite direction Direction revolving straw conveyor, which is surrounded by an arched sieve at the top is that the straw passing through the gap between the straw conveyor and the sieve is diverted obliquely downwards will.

In a known machine of this type, no straw shaker with reciprocating parts is provided. In order to achieve a sufficient separation of the grain from the straw, there are two threshing drums present, which revolve in the same direction. This same direction of rotation is the Flow of threshed material interrupted and almost reversed. The reversal of the direction of movement of the However, threshed material has the disadvantage of increased expenditure of force.

The invention is based on the idea that a complete separation of the grains from the straw is not possible without a reciprocating straw shaker. According to the invention Therefore, the straw conveyor is an essentially horizontal, reciprocating straw shaker downstream. This straw shaker has an inclined end at its end closest to the straw conveyor upward and reaching up to the straw conveyor, the part raised by the conveyor Catches straw and drives it on. This initially results in the advantage of a very clean way of working the threshing machine despite the low power requirement.

A threshing machine with a substantially horizontal, reciprocating straw shaker is already known. In this case, the threshing drum throws the straw diagonally from below, with the interposition of a straw pickup roller, in an arc onto the shaker. However, since this roller is relatively high above the shaker and has a direction of rotation in the same direction as the threshing drum, the front end of the shaker facing the threshing drum is only covered to a small extent by the straw. The vast majority of it, however, already reaches the middle part of the shaker, so that it is not fully used. The same disadvantage also exists in a further known threshing machine with a reciprocating straw shaker, which has an initial part which is directed obliquely upward at the front end. The threshing drum itself serves as a straw conveyor, but it also throws the straw onto the shaker at an angle from below in an arc, threshing device,
especially for combine harvesters

Applicant:

Aktiebolaget Westeräsmaskiner,
Morgongäva (Sweden)

Representative: Dr.-Ing. E. Hoffmann, patent attorney,
Munich 22, Widenmayerstr. 34

Claimed priority:
Sweden of November 21, 1957 (No. 10 587)

Lars Larsson and John Thenander,

Morgongäva (Sweden),
have been named as inventors

again, the front part of which is not fully utilized, which is also reflected in additional use a baffle plate above the shaker cannot be reached.

Compared to the known types, the invention has the advantage that the straw is inclined preferably thrown from above onto the front end of the shaker and thus completely is exploited. Because of the full utilization of the shaker, this can be compared to the known types be kept shorter. It also prevents the upward sloping and up to The straw conveyor reaches the front part of the shaker and wraps the straw around the top quickly rotating straw conveyor, which is constantly cleared of straw in this way, which causes disruptions are turned off.

An embodiment of the invention is shown in the drawing.

Fig. 1 shows a schematic longitudinal section through a combine harvester designed according to the invention, whose cutting apparatus is not shown;

Fig. 2 shows a section along the line II-II in Fig. 1, while

Fig. 3 shows an associated side view.

In the drawing, 1 denotes the housing of the combine harvester. With a conveyor 2 is referred to, the

109 787/126

Claims (1)

winds the mown grain in the threshing gap 3 between the straw cylinder. Part 16 is unge-threshing drum 4 and concave 5 heads. With 6 is fähr parallel to the tangent at the rear end of the called a feed drum for the grain. Sieve grid 8. The rear part of the concave is in a steep angle. In space 9 above the straw conveyor are inclined upwards and backwards in front of an angle. Behind the 5 and behind the straw conveyor collecting troughs 17, 18 threshing drum 4 and higher than this is arranged a with co-for the grains etc., the straw conveyor 7 provided by the sieve collectors 14, go lattice. These grooves run transversely through the, as indicated by arrows, opposite the threshing machines and are in connection with the direction of rotation of the threshing drum revolves, so that the grooves arranged on the outside of the machine facing each other sides of the threshing drum and io 19 or 20, through the the crop on a transverse channel 21 of the straw conveyor falls in the same direction that is in a space 22 below the threshing. The threshed material is therefore located upwards over the cage 5 and the threshing drum. Passed into the top of the straw conveyor. Above the grooves 17, 18 are screw conveyors 17 a and 18 a straw conveyor is a substantially circular arc is provided. Also in the channel 21 a feed-shaped screen grid can be arranged 8, may be arranged by the snail with the i. ₅ The space 9 is accessible from above through a door 42 following grains upwards in a separate manner. The grains, chaff space 9 are tossed. etc., which are passed through channels 19, 20, 21, The gap 10 between the straw conveyor and the fall on the floor 25 of the room 22 down, on sieve grid 8 preferably has a much larger grain, etc., which go through the threshing radial width than the threshing gap 3 between the ao basket 5. In order to ensure a distribution of the threshing drum and the concave 5. The gap 10 in the transverse direction of the threshing machine is, for example, more than twice as large as the infeed, the channel 21 should be longer than half the gap 3. At the highest speed of the threshing drum, the width of the Machine. It is useful at one, its peripheral speed is about the same as the open end and has a longitudinal slot 21 'at the bottom, catching speed of the straw conveyor, while the as through which the material gradually falls down.
Circumferential speed of the straw conveyor at low The bottom 25 is essentially horizontal and the speed of the threshing drum is lower than that firmly connected to the frame of the combine harvester. Peripheral speed of the threshing drum. The falling on the floor is with the help The front end of the sieve grille 8 or one of a scraping conveyor 50 (FIGS. 2 and 3) via the front extension of the same is essentially led back edge 28 into a cleaning tangential known per se to the rear side of the threshing drum 4 gear 29. This is directed by the straw shaker 15, so that the inlet into the gap 10 is approximately straight falling material via an inclined sieve 30 above the rear side of the threshing drum. directly into the cleaning plant. Heavy goods, the straw, which partly strives, even after it does not fall through the upper sieve 29 ', leaves the threshing gap 3 of the threshing drum 35 through a grid 31 into one at the bottom of the cleaning sequence, is essentially straight upwards In the plant located transverse channel 32 down, in which gap 10 is passed and in this in a gentle a screw conveyor 33 is, which guides the material in an arc up and back without a sharp direction elevator 34, from where it is through the channel 19 resulted in changes. The sieve grid 8 extends the distribution channel 21 arrives,
Over an angle that is greater than 90 ° and in the form of 40 At the bottom 25 parallel guide ribs 35 are exemplary embodiment greater than 120 ° or close to 150 °. consolidates, which subdivide the space above the floor 25 in He can also be up to 180 ° or even more, longitudinal channels. This will cause the screen mesh to deteriorate and has elongated guides. This prevents the product located on the floor 25 from running out of the gap 10 obliquely backwards and downwards towards one side of the threshing machine, so that the straw pushes down to 45 when the combine harvester is guided on an inclined straw walker 15 . The sieve grid 8 can drive field. The material, like the concave 5 made of cross bars 44 and 29, is therefore always fed to the cleaning mechanism in a layer that extends longitudinally in the transverse direction of the machine or consists of wires that are as evenly distributed as possible. that the cleaning mechanism is always satisfactorily mounted on a transverse shaft 23 so as to be pivotable. That 50 can work. Wire mesh 44, 45 of the sieve grille ends a little in front of a. The scraper conveyor is shown in Fig. 2 and 3 in larger Cross bar 47 in frame 46, so that shown in front of the bar scale. On in the wall of the mower 47 a free opening 48 is formed. Dreschers bearing shafts 51 and 52, of which the The concave 5 has a rear extension 11, which is driven, are chain- with the help of which it is mounted, for example, pivotable on a 55 wheels 54 for endless chains 55. On the Shaft 11 'is mounted in the threshing machine. The chains are in the cross direction of the machine At the end of the actual concave, comb-extending scraper plates 56 are attached, which with their like wires or strips 12 are provided, which brush outer ends on the bottom 25 in the outside. The sheets 56 Guide example essentially to the axis of the straw have recesses 57 for the loading on the floor 25 are directed towards the conveyor. On the top of the 60 fixed guide ribs 35.
Extension 11 can be provided a sheet metal in the vicinity of the drivers or blades 14 of the PATENT CLAIMS
Straw conveyor lies. The front part 16 of the straw walker forms a 1st threshing device, especially for mowing Angle with the actual plane of the straw walker 65 thresher, with one of an arcuate shape and is diagonally from and up to the straw conveyor and a threshing drum surrounded by a concave directed towards. It extends to the vicinity of the adjoining, higher lying and opposite Straw conveyor and prevents the straw from moving in the set direction of the rotating straw conveyor, which is surrounded at the top by an arched sieve in such a way that the straw passing through the gap between the straw conveyor and the sieve is diverted obliquely downwards, characterized in that the straw conveyor (7) is followed by a substantially horizontal, reciprocating straw shaker (15) and that this straw shaker (15) has at its end closest to the straw conveyor (7) an obliquely upwardly directed part (16) which extends to the straw conveyor (7) and which catches the straw thrown up by the conveyor (7) and drives it on. 2. Threshing machine according to claim 1, characterized in that the front inclined part (16) of the straw shaker essentially parallel to the tangent of the rear part of the to the straw conveyor (7) associated sieve grid (8) runs. Considered publications:
German patent specifications No. 693 314, 741 317,
004 843. 1 sheet of drawings 109 787/126 1.62