RU2058706C1 - Grain combine - Google Patents

Abstract

FIELD: agricultural engineering, in particular, twin-drum combines. SUBSTANCE: grain combine has at least two threshing units 1 and 2, straw shaker 3, main and auxiliary tossing boards 4 and 7, upper and finishing lower screens 5 and 6. Auxiliary tossing board 7 is mounted above upper screen 5 positioned below auxiliary tossing board 7. EFFECT: increased efficiency and reduced grain loss. 1 dwg

Description

 The invention relates to agricultural machinery, and in particular to double-drum combine harvesters.

 A known combine harvester aggregated with a straw chopper and containing two threshing machines, a straw walker and a wind-grain sieve cleaning unit of a grain pile, including an upper and lower sieve and a shaking board.

 A well-known combine does not provide the separation of biologically more valuable (seed) grain emitted by the first threshing apparatus from the rest (feed) part of the grain heap coming from the second threshing apparatus, since both grain flows are mixed on a shaking board and wind-screening. In addition, a valuable feed material is blown out of the heap at the wind-screening unit from the heap, which is not collected in the tank, but scattered across the field.

 The closest in technical essence and technical result to the invention is a combine harvester containing two threshing machines, a straw walker and a windmill cleaning unit for a grain heap, including an upper and lower sieve, a main and additional shake board, with an additional shake board overlapping part of the upper sieve, assembly cleaning contains an additional pitched board, the hopper is divided into two compartments, and the combine is equipped with an additional screw and elevator for feeding grain into the hopper.

 In this combine, the seed and feed grain enters the hopper compartments in different capacities, which reduces the subsequent costs of processing the seed material, however, this result is achieved by significantly complicating the combine due to the introduction of additional elements in its design: a second screw with an elevator, a partition in the hopper, and an additional pitched boards.

 An object of the invention is to simplify the design of the combine harvester.

 The technical result is achieved due to the fact that in the combine harvester, aggregated with a mounted straw chopper and containing two threshing machines, a straw walker and a windmill cleaning unit of a grain heap, including upper and lower sieves, the main and additional shaking boards, with an additional shaking board installed above the upper sieve, according to the invention, the upper sieve is completely located under the additional shaking board.

 The drawing schematically shows a combine harvester.

 The combine harvester contains the first 1 and second 2, threshing machines, a straw walker 3, the main shaking board 4, a wind screen cleaning equipped with upper 5 and lower 6 sieves, an additional shaking board 7 that completely covers the upper sieve 5, grain auger 8 with elevator 9, hopper 10, scoop 11, chopper 12 (for example, PUN-5). The bottom of the additional shaker board has adjustable flaps (not shown).

 Combine harvester operates as follows.

 Grain heap coming from under the deck of the first threshing apparatus 1, containing biologically valuable (seed) grain, enters the main shaking board 4, which is fed to the upper sieve 5 of the wind screen, is cleaned and fed with the help of the grain auger 8 and elevator 9 into the hopper 10. The floor, allocated for wind-sieve cleaning, the half-accumulator 11 is fed into the grinder 12.

 The grain heap from under the second threshing apparatus 2 and the straw walker 3 containing feed grain falls on an additional shaking board 7 and is fed into the chopper 12 by the scoop 11. At the same time, the adjustable leaves of the additional shaking board 7 are closed, so the grain heap does not enter wind-screen cleaning.

 Straw with a straw walker 3 is also fed into the chopper, where it is chopped and scattered across the field, and the grain heap allocated by the second threshing apparatus 2 and the floor with cleaning by the chopper fan 12 are fed into the trailed cart 13.

 When the harvester is working on cleaning food crops, the flaps of the additional shaker board 7 open, and the grain allocated by the second threshing apparatus 2 wakes up for cleaning, where it is mixed with common grain and enters the hopper 10.

 The invention simplifies the design of a combine harvester.

Claims (1)

 A GRAIN COMBINER containing at least two threshing machines, a straw walker, a main and additional shaker boards, an upper and lower sieve, with an additional shake board installed above the upper sieve, characterized in that the upper sieve is completely located under the additional shake board.