Abstract
Small-sized Japanese tractors have been developed mainly for the use of rotary tillage. They have special three-point linkages, and differ from the standard linkage system. The basic behavior and the mechanical characteristics of the three-point linkage for rotary tillage are clarified in this study. The purpose is to obtain an instruction of the rational design of three-point linkage for a rotary tilling tractor.
This report clarified the geometric characteristics and the basic behavior of the virtual hitch point depending on changing depth of tillage which is important to rotary tillage at the free link condition. Their actual tendency based on the specification data of small-sized Japanese tractors was explained. It will be clarified under the limited condition of the virtual hitch point for stable rotary tillage and the design instruction of rational three-point linkage in future reports.
