Development of High-Speed Rotary Tiller (Part 1)

Fundamental Studies for the Shape and the Arrangement of Blades

Abstract

We developed a rotary tiller that enables work at a higher speed by reducing the power requirement while maintaining almost equal work accuracy compared to conventional machines. Based on the results of this study, the high-speed rotary tiller has been commercialized and is utilized for tillage mainly in paddy fields. In this report, we presented the following test results. (1) The arrangement of blades for two cuttings per rotation was suitable for tilling paddy fields compared to three cuttings due to the low accumulation and holding of soil. (2) Though the power requirement was reduced by increasing the cutting width of the blade, improving the soil pulverizing performance was a major issue. (3) The soil pulverizing performance for the wider cutting width of the blade was improved by increasing the cutting angle of the rotary blade.