Studies on the Oscillating Subsoiler (3)

Trial Manufacture of Oscillating Subsoiler for Tractors and Its Test

Abstract

A trial manufacture of oscillating subsoiler which is mounted on tractors was done for the study on the effects of oscillation to the subsoiler.
The oscillating mechanism of this subsoiler is shown in Fig. 1. The oscillating standard and chisel are driven by eccentric cam and the pitman which is adjustable its amplitude, frequncy and oscillating direction of chisel point: amplitudes at the chisel point 4.7-27.8mm, frequencies of the chisel 7-35cps and oscillating directions of chisel 0-20degrees.
In the field experiment, the power requirements for driving the traction wheel is reduced about 20-40 percent by the oscillation of chisel, and the oscillating velocity of chisel v is more effective than the tractor velocity V, (V/v<1).
In the region of V/v values of less than 1, the suitable oscillating direction of chisel is 0 degree in view of the power requirements.
On the pulverized soil, the vertical sectional area of the pulverized soil is maximum at the subsoiled depth of 20-30cm. The pulverized ranges of soil (pulverized angle of section) is larger with the subsoiled depth is deeper, and yet its angle is about 50-60 degrees in practical use.
Under these results, the R-II type oscillating subsoiler which is shown in Fig. 11 was made for trial. This subsoiler is used in the amplitude about 1.7mm, the frecency of oscillation 20.7cps, the oscillating direction 0 degrees and the subsoiled depth 15-50cm.
By the results of various tests, it has been proved that this trial subsoiler can be used on the paddy and other fields.