Grain cleaning system for a combine harvester

Grain cleaning system for a combine harvester

A grain cleaning system for a combine harvester, comprises a frame supporting a grain pan and a sieve. The grain pan receives grain and chaff separated from the crop by a threshing mechanism and is reciprocable relative to the frame in order to separate the grain from the chaff and to propel the gra...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DUQUESNE FRANK R.G, BOSSUYT JOHNNY, DHONT ANDRE G.J, SOMERS TOM N.N
Format: Patent
Sprache:eng
Schlagworte:
AGRICULTURE
ANIMAL HUSBANDRY
DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
FISHING
FORESTRY
HAY OR STRAW PRESSES
HUMAN NECESSITIES
HUNTING
PROCESSING OF HARVESTED PRODUCE
TRAPPING
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Beschreibung
Zusammenfassung:A grain cleaning system for a combine harvester, comprises a frame supporting a grain pan and a sieve. The grain pan receives grain and chaff separated from the crop by a threshing mechanism and is reciprocable relative to the frame in order to separate the grain from the chaff and to propel the grain and chaff towards the sieve. The sieve is reciprocable relative to the frame and is connected to the frame by front and rear support arms and that are pivotably secured to the frame and to the sieve. In the invention, the front support arms have different geometries from the rear support arms such that when the sieve is reciprocated relative to the frame, the vertical component of oscillation is greater at the front end than at the rear end of the sieve.