4輪トラクタの接地圧について (第2報)
遊輪の踏圧が前後輪接地圧に及ぼす影響
1968 年 29 巻 4 号 p. 183-185
詳細
1968 年 29 巻 4 号 p. 183-185
Fig. 2 shows the measuring results of the tractor weight that weigh to the 3 wheels which stand in a line at one side.
In the figure, we can understand the fenomenon as followed. That is, the more increase the pressure of the idle wheel that is setting between the front and the rear wheels, the more decrease the weight of the rear wheel in inverse proportion to weight of the idler and, at the same time, the weight of the front wheel decreases slightly.
We can understand this reason from the structure of the half-track.
Next, in fig. 4 showing the relation of the ground contact pressure and the depth of the wheel sinking, the ground contact pressure of the front and the rear wheel as follows;
Rear
Dexta 0.15-0.2kg/cm2 0.1-0.2kg/cm2
R-210 0.2-0.3kg/cm2 0.15-0.25kg/cm2
Therefore, when the tightening spring is acting most effectivly, the ground contact pressure of the half-track and the front wheel keeps the well-balanced condition.
But, the ground contact pressure of the medium size tractor, that may be regarded as main force in our country, is twice higher than that of the large size tractor.
Therefore, the ground contact area of the medium size tractor must be twice, than the present one.
