AUTOMATIC PLOWING DEPTH CONTROLLING DEVICE IN ROTARY PLOWING MACHINE

摘要

PROBLEM TO BE SOLVED: To obtain the subject device capable of reducing hunting phenomenon in a shallow plowing without sacrificing the reduction of plowing depth accuracy by selecting large insensitive angle value in a shallow plowing depth side and a small insensitive angle value in a deep plowing side based on a standard angle value in an automatic plowing depth controlling device by using a leveling plate. SOLUTION: This automatic plowing depth controlling device in a rotary plowing machine by using a leveling plate 7 is obtained by setting different large and small angle valuesβ, a beforehand as insensitive angles, also installing an insensitive area selecting means for selecting the large insensitive angle valueβin a shallow plowing depth side and selecting the small insensitive angle valueαin a deep plowing depth side respectively as a set value in a plowing setting device based on a previously set standard angle valueθof the leveling plate, and setting an insensitive area width Y in plowing depth direction in the case of shallow plowing side larger than an insensitive area width X in plowing depth direction in the case of deep plowing side based on the standard angle valueθas a set value of the plowing setting device as the insensitive angle valuesβ,α.