Studies on the power tillers (2)

Pursuits of the movement and action of important parts

Abstract

In these studies, essential parts of typical forms of power tillers produced in our country, were to make clear in taking pictures.
1) Under the difficulty of giving the accurate names of curve for movement locus, we found trochoid curve which had deep loop in movement locus of tiller's edge by using Rotary type's and Screw type's and abnormal spiral curve by using Crank type's and trochoid curve which had the same loop.
2) In running equipments we found cycloid curve by using wheel type's, and flat parabola curve by using caterpillar type's.
3) In consequence of analysis for the construction of cultivated earth with power tiller we found much rough clod in the upper part with Rotary type's and Screw type's, but otherwise we found much fine clod in the lower part with these type's. Then we found less difference in phenomena with crank type's than with them.
4) In running equipments, the strong point was appeared to rubber wheel as soil was hard, but iron wheel was suited to opposite case.
5) Between wheel type and caterpillar type, the latter was generally found greater shock of vibration than the former, and seemed to make worse effect to the machine.