Crop threshing or separating – Straw chaff spreader or handling – With chopper
Patent
1990-03-08
1991-08-27
Melius, Terry Lee
Crop threshing or separating
Straw chaff spreader or handling
With chopper
56294, 56504, 56DIG17, A01D 3462, A01D 4112
Patent
active
050429736
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention refers to a straw cutter, particularly for combines and the like, and of the type incorporating a rotor rotatably disposed in an apparatus housing and equipped with knife arms, preferably in the form of beaters, which knife arms when rotating are intended to pass between a plurality of counter-knives disposed in at least one row.
BACKGROUND OF THE INVENTION
A rotor of this type creates a blower action, whereby a portion of the conveyed air passes out through the outlet of the apparatus housing together with the disintegrated straw and contributes to the dispersion thereof. The knife arms of the rotor generally are constituted by flats having an edge at both longitudinal sides.
PURPOSE AND MOST ESSENTIAL FEATURES OF THE INVENTION
The purpose of the invention is to provide a straw cutter of the type mentioned in the introductory part, which gives an increased blower action and thereby an improved distribution of the disintegrated straw. This has according to the invention been solved therein that the knife arms of the rotor along at least a part of their length are designed with a V- or arch-shaped cross section.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention hereinafter will be further described with reference to an embodiment shown in the accompanying drawings.
FIG. 1 is a cross section through the apparatus housing with a rotor supported therein.
FIG. 2 is an axial section through the device of FIG. 1.
FIG. 3 shows in bigger scale a side view of a pair of knife arms attached to the rotor according to one embodiment.
FIG. 4 shows a front view of the knife arms of FIG. 3.
FIG. 5 shows a side view of a knife arm according to another embodiment.
FIG. 6 shows a planar view of the knife arm according to FIG. 5.
FIG. 7 and 8 are front views corresponding to FIG. 4 but showing other embodiments of knife arms.
FIG. 9 and 10 schematically show cross sections through knife arms having different relative locations for obtaining a desired distribution effect.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The straw cutter incorporates an apparatus housing 10, in the gabels of which is supported a knife rotor 11 equipped with radially projecting knife arms 12. At rotation of the rotor 11 the knife arms 12 pass between counter-knives 13, which are fitted in a knife beam 14. The knife beam 14 is pivotably connected to the apparatus housing 10 about the shaft 15 and it is arrestable in different positions 16, relative thereto, thus that the length of the part of the counter-knives 13 projecting between the knife arms 12 of the rotor 11 is variable, for allowing the straw cutter to be adjusted to different crops and fodders.
The knife arms 12 are not attached directly upon the rotor shaft 11 but via holders 17. The knife arms 12 are constituted by pivotably arranged beaters disposed in pairs about the same pivot shaft 18 at each holder. The beaters thus arranged in pairs are via the holders 17 attached in a zigzag pattern to the rotor 11.
For increasing the blower effect of the rotor 11 and thereby increasing the distribution of the disintegrated straw the knife arms 12 are designed with a shovel-like shape in that they have been bent in a cross section across the knife arm to form a slight V-shape or alternatively an arched shape (FIG. 8) along the longitudinal direction. The V-shaped section according to the embodiment shown in FIG. 3 and 4 is successively reduced towards the mounting end of the knife arm 12, which has a planar, preferably rectangular cross section. The knife arms 12 thus arranged in pairs in this embodiment are positioned thus that the tips of the V are directed outwards away from each other. The angle between the shanks 19 of the V-shaped knife arm 12 at the outermost end of the knife arm preferably amounts to 150.degree.-170.degree.. According to the embodiment shown in FIG. 5 and 6 the v-shaped cross section is mainly constant and terminates adjacent the mounting end of the knife arm 12 in a planar cross section. The paired knife arms 12 according to FIGS.
REFERENCES:
patent: 2640309 (1953-06-01), Benson
patent: 2990667 (1961-07-01), Schwalm
patent: 3309854 (1967-03-01), Mitchell et al.
patent: 4612941 (1986-09-01), Kunde
patent: 4631910 (1986-12-01), Doyen et al.
LandOfFree
Straw cutter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Straw cutter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Straw cutter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1411759