RU2478277C1 - Cleaning of grain combine harvester - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machinery industry and can be used in cleaning units of a grain combine harvester. Cleaning of grain combine harvester includes an agitator board with a finger comb mounted on its end, a sieve boot and a fan. The finger comb fingers are pivotally mounted on the agitator board and connected to it by springs. Along the lower side of the fingers gusset plates in the form of a rectangular triangle are attached. The gusset plates are based with the long side on the crossbar which is rigidly attached to side panels of the threshing machine. The direction of the gusset plate location on adjacent fingers is oriented in opposite sides.

EFFECT: cleaning of a grain combine harvester provides efficient separation of fine fraction of the threshed heap from large impurities.

3 dwg

Description

FIELD OF THE INVENTION

The invention relates to agricultural machinery and can be used in the design of cleaning a combine harvester.

State of the art

A known design for cleaning the harvester, consisting of a transport board with a finger bar grill, consisting of fingers fixed rigidly on a plate that is bolted to the rear transverse connection of the transport board (Combine harvesters "Don" / Yu.A. Peskov, I.K. Meshcheryakov , Yu.N. Yarmashev et al. - M: Agropromizdat, 1986. - p. 59-60).

The disadvantage of this device is the poor separation of threshed seed-bearing heap.

It is known to clean a combine with a finger comb, the fingers of which along their length have holes in which the axes are inserted, and segments and a lever are fixed on them. The lever is connected by a rod with a fixed beam, which is mounted in brackets on the side panels of the grind. When the transport board moves along with the sieve forward, the segments by means of rods, levers turn counterclockwise and make a working stroke. Turning at a certain angle, the segments throw a heap on their fingers (ed. St. USSR No. 1192707, class A01F 12/44).

The disadvantages of this device are the design complexity, metal consumption and insufficiently effective separation of the threshed seed-bearing heap.

The closest in technical essence and the achieved positive effect and accepted by the authors for the prototype is the cleaning of a combine harvester containing a shaking board with a comb mounted on its end, equipped with fingers, a fan and a sieve mill. The fingers of the comb are pivotally mounted and equipped with an oscillation mechanism made in the form of a shaft with cams interacting with the fingers, while adjacent cams are phase-shifted relative to each other, and agitators are mounted between the fingers on the shaft (ed. St. USSR No. 1591862, class A01F 12/44).

The disadvantages of this device are the design complexity and additional energy costs for driving the rotation of the shaft with cams.

Disclosure of invention

The technical result, which can be achieved using the present invention, is reduced to the high efficiency of separating the small fruit-seed fraction of the threshed heap from large impurities.

The technical result is achieved by cleaning the combine harvester, which includes a shaking board with a finger comb mounted on its end, equipped with fingers, a sieve mill, a fan, and the fingers are additionally equipped with scarves made in the form of a rectangular triangle, mounted with the opposite fingers oriented directions and supported by the long side on the cross member, while the fingers are pressed by springs to the cross member, which is rigidly attached to the side panels of the grind .

Brief Description of the Drawings

The figure 1 - shows a cleaning scheme of the harvester, General view;

figure 2 - finger lattice in the extreme forward position;

figure 3 - finger lattice in the extreme rear position.

The implementation of the invention

Cleaning the combine harvester includes a shaking board 1 with a finger comb 2 mounted on its end, a sieve mill 3 installed behind the shaking board 1, a fan 4 installed in front of the sieve mill 3. The fingers 5, which are equipped with finger comb 2, are pivotally mounted on the shaker board 1 and connected to it by springs 6. Along the bottom side of the fingers 5 are fixed scarfs 7, having the shape of a rectangular triangle, which are supported by the long side on the cross member 8, rigidly attached to the side panels of the thresher (in figures e not shown). The direction of the location of the scarves 7 on the adjacent fingers 5 is oriented in opposite directions.

Cleaning the combine harvester works as follows.

Shaking board 1, making reciprocating movements (forward - backward and with a slight upward movement), promotes the delamination of the threshed seed-bearing heap: heavy particles go down and the lungs are concentrated in the upper layer, but when harvesting crops such as legume seeds, not threshed the fruit fraction is difficult to separate from large straw particles and is located in the upper layer of the heap. While moving the shaking board 1 to its extreme forward position (Fig. 2), one (even or odd) headscarves 7 of fingers 5 advance and rise along the cross member 8, thereby raising fingers 5. At the moment when the headscarf 7 reaches the front forward cross member 8 positions, fingers 5 will rise to the maximum angle. The neighboring fingers 5, on the contrary, will lower at this time, as the kerchief 7 leaves the cross-member 8. During the movement in the opposite direction, the raised fingers 5 lower when the neighboring fingers rise. Spring 6 prevents the chaotic movement of the fingers. As a result of the alternate raising and lowering of adjacent fingers 5 of the finger comb 2, the threshed seed-bearing heap is actively loosened, thereby improving the spilling of light and small particles on the sieve mill 3 between adjacent fingers 5, located at different levels, and large plant debris held on fingers 5 and come off from them to the middle of the sieve mill 3. The loosening of the heap contributes to its more intensive separation by the air flow created by the fan 4.

Compared with the prototype and other technical solutions, the invention has advantages:

- enrichment of the heap with seeds is provided;

- simplicity and reliability of the device;

- does not require additional drives of the working bodies;

- reduction of energy costs for the processing of heaps.

Claims (1)

Cleaning the combine harvester, which includes a shaking board with a finger comb mounted on its end, equipped with fingers, a sieve mill, a fan, characterized in that the fingers are additionally equipped with scarves made in the form of a rectangular triangle, mounted with the orientation on adjacent fingers in opposite directions and leaning long side on the cross member, while the fingers are pressed by springs to the cross member, which is rigidly attached to the side panels of the grind.

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