Apparatus and method for changing the position of a mowing mechanism
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United States of America Patent
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Jul 24, 1990
Grant Date -
N/A
app pub date -
Mar 9, 1989
filing date -
Mar 9, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A positional regulation of a mowing mechanism is effected in terms of height as a function of a ground pressure signal (SB) and in terms of swiveling in the transverse direction as a function of lateral ground clearance signals (SL, SR), the adjusting signals being carried to hydraulic valves (VT, VH; VL, VR). The goal is to increase the accuracy and freedom from fluctuation in the course of the mowing mechanism cutting height. The ground clearance signals (SL, SR) are used in proportion with the ground pressure signal (SB) for vertical position regulation. A linkage of these signals (SL, SR, SB) with further transducer signals and a method for automatic adaptation of the regulating characteristic by varying the hystereses and idle times of the regulators (V1, V1) is disclosed. The regulating apparatus is used in harvesting and threshing combines when low-height crops are to be mowed and when the ground is bumpy and soft.
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