DE1004843B - Threshing mechanism, especially for combine harvesters - Google Patents

Description

GERMAN

The invention relates to threshing mechanisms, particularly for combine harvesters, and relates to training the transition from the threshing unit to the screening plant.

The invention is based on the task of feeding the first one as uniformly as possible To reach vibrating sieve and thereby also throwing grains over the sieve as well as avoid the resulting losses.

A known device for solving this problem is the straw pickup roller, which in a certain Height behind the threshing drum catches the incoming straw at high speed and Deflects towards the sieve. Their speed of rotation must be proportionate when there is a large amount of straw be high to avoid clogging of the drum, while with smaller amounts of straw the The damming effect must be increased by reducing the speed in order to prevent grains from spraying away to prevent over the sieve by more concentrated the straw at this point. In practice, however, the advantages of such a speed adjustment are dispensed with, because they either requires considerable technical effort or a lot of time to convert.

The invention improves the previously known threshing mechanisms, preferably those with rotating Threshing drum and stationary concave, due to the fact that in them behind the concave and in front The screening system has a deflecting vane that can be swiveled and locked around an axis parallel to the threshing drum is arranged.

This the combination of a known .Strohabnehmerwalze with one on the concave subsequent adjustable deflector wing-forming training has the essential advantages during threshing, that with little or short straw there are no grains thrown far back and fewer losses there and that with a lot and long straw through open of the threshing gear, the drum has a lower tendency to wrap and thus a greater tendency Performance is present. In addition, there is no change in the speed of the straw pickup roller more is required and an immediate adjustment to the often very strong and rapidly changing amounts of straw possible.

In general, the pivotable and lockable diverter vane is designed as a solid wall. He can but also wholly or partially have the shape of a rake or a comb.

Such a diverting vane can also expediently be divided in the longitudinal direction, so that its parts are independently adjustable.

Threshing mechanism, in particular for combine harvesters

Applicant:

Maschinenfabrik Fahr AG,
Gottmadingen (district of Konstanz)

The setting of the discharge wing is preferably carried out by means of a lockable hand lever.

But you can also automatically adjust the deflector or its parts to the changing Provide one or more springs for straw fall, taking the tension of the spring or springs is expediently adjustable.

Further details and features can be found in the description of the exemplary embodiment shown in the drawing emerged. In the drawing is

1 shows a schematic side view of a threshing mechanism with a subsequent straw chamber and vibrating screen,

Fig. 2 is a view of a discharge wing, shown partly as a discharge wall, partly as a discharge rake.

In the threshing mechanism shown, the material to be threshed passes through the conveying device 1 via the Platform 2 to the threshing drum 3 rotating in the direction of the arrow and is between it and the Threshed concave 4. The greater part of the grain falls through the concave. The rest leave the drum at high speed in the direction of arrow 5 and initially moves on the indicated Trajectory 6, which is caused by the rotating straw pickup roller 7 in the direction 8 against the vibrating screen 9 is too distracted. The diverting vane 10 or diverting rake 11 can be pivoted about the axis 12 stored and can be in the dash-dotted layers 13 resp. 14 can be pivoted. The setting is made by the hand lever 15, which is located in an adjusting arc 16 can be determined (Fig. 2).

In another exemplary embodiment (FIG. 1), at least one which acts on the lever 17 takes place Spring 18, the tension of which can be adjusted by a screw 19, an automatic

609 840/50

Adjustment of the position of the discharge wing or rake to the amount of straw that arises.

Claims (7)

PATENT CLAIMS: 1. Threshing unit, especially for combine harvesters, preferably with a rotating threshing drum and stationary concave, characterized by the combination of two known features, namely the arrangement of a straw collector roller arranged behind the threshing drum, the straw thrown from the threshing drum towards the one below. Distracts shaker, and aine working with this roller, at the outlet end of the concave pivotably mounted and in different Inclined positions to the straw pick-up roller adjustable deflector blades. 2. Threshing mechanism according to claim 1, characterized in that the diverter vane is a solid wall (10) is formed. 3. Threshing mechanism according to claim 1, characterized in that the diverter vane is wholly or partially is designed as a comb (11). 4. threshing mechanism according to claim 1 to 3, characterized in that the diverter vane in the longitudinal direction is subdivided, the parts being adjustable independently of one another. 5. Threshing mechanism according to claim 1 to 4, characterized in that the diverter vane, preferably is adjustable by a hand lever (15). 6. Threshing mechanism according to claim 1 to 4, characterized in that for automatic adjustment of the discharge wing (10 or 11) or its parts on the changing straw fall one or more Springs (18) are provided. 7. threshing mechanism according to claim 6, characterized in that the tension of the spring (18) or the springs can be adjusted by a device (19). Considered publications:
German Patent No. 397 594;
French patent specification No. 342 400. 1 sheet of drawings © 609 840/50 3.57