Solid material comminution or disintegration – Apparatus – Combined or convertible
Reexamination Certificate
1999-08-02
2001-03-06
Rosenbaum, Mark (Department: 3725)
Solid material comminution or disintegration
Apparatus
Combined or convertible
C241S243000, C241S605000
Reexamination Certificate
active
06196483
ABSTRACT:
BACKGROUND OF THE INVENTION
The subject matter of the invention is a straw-cutting machine which is positioned behind the grain separating devices of a combine harvester and whose separating organs chop the stalks falling from the straw walkers into short pieces.
SUMMARY OF THE INVENTION
The object of the present invention can be found in that, on the one hand, thanks to an innovative, special disposition of the generally conventional deflector, which—below the straw walkers—guides the stalks falling down from these to the cutting tray at the inlet into the cutter and, on the other hand, thanks to an innovative, special design of the distributor hood located behind the cutter, the receiving of the stalks by the chopping drum is more secure and the ejection and distribution of the chopped stalks onto the field soil is essentially improved over existing designs.
A secure, uninterrupted receiving of the straw by the chopping drum prevents interruptions to and jams in the straw outlet hood of the combine harvester due to the stalks falling from the straw walkers and has a positive effect on the chopping process.
A uniform distribution of the chopped stalks over the whole cutting width through the distribution hood is desirable for an uninterrupted working into the field soil and the best possible rotting.
Due to the relatively high speed of the chopping drum, there is formed around the chopping drum of a combine harvester straw-cutting machine a mantle-like rotating ring of air of which, in cutters of current design, a substantial portion flows into the straw outlet hood and hinders the receiving of the stalks falling from the straw walkers by the cutting blades (
19
) or tangs (
35
).
This air which has flowed into the straw hood is then not available for the ejection of the chopped stalks.
In accordance with the invention, this hindrance is avoided by the deflector (
7
) at the inlet into the chopping housing being formed in an arched design between the end of the straw walker and the inlet into the cutter, with the upper part of the deflector possessing a certain angle to the perpendicular, while the lower part ends approximately perpendicularly. Furthermore, the inlet of the cutting tray is inset forwards from the center of the cutter over the lower part of the deflector.
The lower end of the deflector and the beginning of the cutting tray are connected to each other by an approximately horizontal transverse tray (
15
,
34
). Advantageously, this transverse tray is designed with an upwards arch form. Thanks to this combination of deflector end to cutting tray inlet, the ring of air around the outside effective diameter of the cutting drum is cut off and air flows into the straw ejector hood which hinders the receiving of the stalks to be chopped are prevented. Rather, the cut off air is deflected into the area of rotation of the chopping drum, by means of which at the inlet into the chopping box a slight suction effect is created on the stalks to be chopped in the direction of rotation of the chopping drum.
At the transition of the chopping box to the distribution hood, a similarly negative effect of the ring of air exists in cutters of current construction.
The height of the inlet to the distribution hood on cutters of current construction is a maximum of ⅓ of the drum diameter.
Following on this is a closed part up to the connection of the cutter to the straw ejector hood of the combine harvester. In this part, a ring of air builds up which flows into the straw ejector hood and which pushes upwards the stalks falling from the straw walkers.
In accordance with the invention, the transition from the cutter housing to the straw ejector hood is designed so that the free exit height is around ⅔ of the drum diameter, with the upper cover of the distribution hood possessing at the front end transversely over the width a tray (
23
) which is aligned approximately perpendicularly to the central axis of the cutting drum and having a distance to the outer drum circumference of around 10 mm. In this way, the ring of air is cut off and deflected into the distribution hood. To avoid eddies of air in the distribution hood, roughly at the center of the height of the distribution hood, a transverse metal partition is installed which divides the distribution hood into two chambers and whose front edge also extends perpendicularly to the central axis of the cutting drum up to about 10 mm away from the outer circumference of the cutting drum, with as a result the ring of air also being cut off here and the air being deflected into the distribution box.
Directly above the metal partition, at the transition from the cutter housing to the distribution hood, apertures are disposed on both side walls of the distribution hood through which the air can flow in. A transverse intermediate plate (
28
) separates the air flowing in from the area above the metal partition.
Thanks to the actions at the cutter inlet and the cutter outlet described above, at these points air flowing off the air of ring pressing into the straw ejector hood is prevented.
The transverse distribution of the chopped stalks flowing out of the distribution hood is performed in the known manner by means of arched distribution plates rotatable through a roughly perpendicular axis.
The vertical distribution of the stalks flowing out is performed by an adjustment to the metal partition and the floor plate around horizontal axes in the area of the connection of the distribution hood to the cutter housing.
REFERENCES:
patent: 3103241 (1963-09-01), Weigl
patent: 4532941 (1985-08-01), Gauthier
patent: 4637406 (1987-01-01), Guinn et al.
patent: 0166116 (1986-01-01), None
patent: 0538599 (1993-04-01), None
Biso B.V.
Dilworth & Barrese
Rosenbaum Mark
LandOfFree
Chaft cutter for comminuting haulm behind the... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Chaft cutter for comminuting haulm behind the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chaft cutter for comminuting haulm behind the... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2451144