Concave adjust assembly including a torsion axle for damping crop threshing impulse loads
a technology of concave adjustment and impulse load, which is applied in the direction of threshers, agriculture, applications, etc., can solve the problems of fatigue failure, breakage and/or failure, etc., and achieve the effect of minimal impulse load transmission, reduced occurrence of damage to drive, and effective damped and dissipation
Active Publication Date: 2010-10-21
BLUE LEAF I P INC
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AI Technical Summary
Benefits of technology
The torsion axle effectively reduces the transmission of damaging impulse loads to the drive system, minimizing damage and failure, and allows for precise concave position adjustments without significant deformation of damping elements.
Problems solved by technology
A problem that has been discovered with use of such remote concave adjust assemblies, however, is that threshing forces generated by the rotation of the rotor and resulting impacts with the crop material during threshing, can be transmitted through the concave and the apparatus in support thereof, e.g., linkages, cross bar, etc., to elements of the concave adjust assembly, resulting in breakage and / or failure thereof.
It has been found that the threshing forces, particularly those resulting from intermittently occurring plugs or slugs of crop material, can translate into repeating impulse or shock loads which have a jack hammering effect on the adjust assembly elements of the adjust assembly which can cause fatigue failures over time.
Method used
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[0020]Referring to FIG. 1, a representative self-propelled combine 20 is shown, including a threshing system 22 constructed and operable for threshing crop material cut by a header 24 and conveyed to threshing system 22 via a feeder 26, as combine 20 moves in a forward direction, denoted by an arrow A, over a field, in the well known manner. Generally, threshing system 22 includes at least one elongate, generally cylindrical rotor 28 rotatable about a longitudinal axis thereof within, and relative to, a cylindrical tube or housing 30, a lower portion of which housing 30 comprises a concave 32. Concave 32 is typically constructed so as to have a plurality of orifices or apertures therethrough, sized for passage of crops, e.g., grain, legumes, etc., therethrough, as well as smaller particles and elements of crop material other than grain (MOG), en route to a cleaning system of combine 20 disposed below threshing system 22, again, in the well known manner.
[0021]Referring also to FIGS. ...
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The concave adjust assembly uses a torsion axle connecting a drive to a concave. The torsion axle includes an inner element having an angular sectional shape, a tubular outer element disposed about the inner element and having a larger angular sectional shape oriented such that corners of the tubular element are disposed opposite flats of the inner element, the elements being laterally relatively rotatable, and damping elements disposed between the inner and outer elements such that the rotation will compressively load the damping elements. The drive includes a motor, such that operation of the motor will adjustably move the concave, and the damping elements will damp impulse loads generated from threshing, to reduce transmission of the loads to the drive.
Description
TECHNICAL FIELD[0001]This invention relates generally to apparatus for adjustably supporting a concave of threshing apparatus of an agricultural combine, and more particularly, to a concave adjust assembly utilizing a torsion axle for damping impulse or shock loads generated from threshing crops.BACKGROUND ART[0002]An agricultural combine generally includes a threshing system including at least one concave disposed about a threshing rotor of the system. A gap will be located between the concave and rotor, and is desirably variable for accommodating different crops and conditions. In particular, it has become a desirable feature to have a capability to remotely adjust the gap just before and during operation of the combine. To meet this desire, concave adjust assemblies or mechanisms have been developed to allow concave gap adjustments to be made by the combine operator or another person using a suitable input device or switch, located in the operator cabin or another location, and s...
Claims
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IPC IPC(8): A01F12/28
CPCA01F12/28
Inventor FLICKINGER, WAYNE T.ISAAC, NATHAN E.MATOUSEK, ROBERT A.CLAERHOUT, BRYAN S.
Owner BLUE LEAF I P INC