Development of Coaxial Counterrotating Rotary Tilling System

A computer simulation of the soil reaction force was very helpful to develop the new rotary tilling system of a walking tractor which uses coaxial simultaneously counterrotating blades to stabilize the tractor while tilling.

The simulation revealed that the fluctuation of the soil reaction force generated by the new tilling system retaining a conventional blade arrangement is great compared with the ordinary tilling system, and that the system with an appropriate blade arrangement improves this fluctuation.

The walking tractor developed using this computer simulation tool demonstrates the capability of being operated stably up to its maximum output of rotary shafts.