Crop threshing or separating – Straw chaff spreader or handling – With chopper
Patent
1997-08-07
1999-07-27
Melius, Terry Lee
Crop threshing or separating
Straw chaff spreader or handling
With chopper
460113, 56505, A01F 1240
Patent
active
059280808
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The object of the invention is a straw-cutting machine which is positioned behind the grain separation devices of a combine harvester and whose separating organs chop the stalks falling from the straw walkers into short pieces which are discharged through a distribution box and deposited on the floor spread over the cutting width.
Straw-cutting machines of a conventional design generally have cutter knives supported in a freely movable manner on a cylinder tube which cutter knives take up the falling stalks and beat against fixed position opposite cutting knives. In this process, the stalks are cut up while consuming high power.
Furthermore, this type of construction has the disadvantage that stalks passing roughly in a longitudinal direction over the straw walkers are only separated insufficiently. This is bad in that due to new cultures the straw is becoming ever shorter and ever more stable and thus passes over the straw walkers in a longitudinal direction in a larger quantity.
But longer straw in a large quantity is only insufficiently distributed behind the distributor hood, it can only be poorly worked into the soil and it rots badly.
SUMMARY OF THE INVENTION
The object of the invention is to reduce the power requirements of the straw-cutting machine over known versions, to cut and disintegrate the straw shook out in uniform short pieces irrespective of whether it falls from the straw walker in a lateral position or longitudinal direction and to distribute it uniformly on the soil over the whole cutting width with a powerful air flow.
In the process, the foreign bodies carried with the stalks should pass through the straw-cutting machine without damaging or destroying it.
This is achieved in accordance with the invention by having instead of the conventional chopping knives supported in a freely movable manner on a cylinder tube, tangs fixed rigidly on a cylinder roll and provided on their front sides with an aggressive, eccentrically relieved serration which tangs take up the stalks to be separated and pull them in a relatively thin stalk veil in a drawing cut over chopping knives with a sharp cutting edge fixed on the chopping floor whereby the stalks are separated with a relatively low energy consumption.
The width of the tangs corresponds here approximately to the width to which the laterally positioned stalks should be cut.
The tangs are positioned uniformly distributed in any number of rows in a spiral shape on the circumference of a cylinder roll with the first tang of a row in each case lying in a longitudinal direction of the cylinder roll at the same height as the last tang of a row on the opposite side.
By means of this design, the stalks pass through the straw-cutting machine in a relatively thin veil with practically only two tangs in each case frictionally contacting the stalks to be separated being separated by the chopping knives.
In this way, a constant, relatively low torque results and correspondingly a low constant power requirement.
In this process, tang on tang can lie in a row with a gap between each through which the fixed position chopping knife can pass. But one tang each can also be omitted from a row so that the number of cuts and thus the power requirement is reduced.
One special advantage of the wide tangs is also that they first generate a powerful wind around the cylinder mantle and then securely discharge the chopped stalks through the spade-shaped design.
The fixed position chopping knives are fixed in pairs on rotating knife-bearers supported on a knife floor positioned outside and roughly parallel to the cutting floor. Here, the knife-bearers are provided with stops which are pressed against the knife floor by means of springs. The chopping knives themselves protrude into the chopping box through slits in the knife floor and the cutting floor. If a hard foreign body is taken up by the tangs, the chopping knives yield to the outside so that the foreign body can pass the cutting device without damaging it. The knife floor can be retrac
REFERENCES:
patent: 2626159 (1953-01-01), Thompson
patent: 2950747 (1960-08-01), Alloway
patent: 3005637 (1961-10-01), Hetteen
patent: 3350017 (1967-10-01), Howell et al.
patent: 4631910 (1986-12-01), Doyen et al.
Biso B.V
Melius Terry Lee
LandOfFree
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