On the Tractive Performance of Small-size Crawler (I):Traction Test on the Flat Road

概要

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To take the place of the driving wheels of 4-wheel tractor, the crawler has been set recently and morover the rubber crawler has been manufactured on accunt of making up the running faults of the iron crawler.On accunt of comparing with the performace of three running types (pneumatic tyre, iron crawler and rubber crawler), the tractive performance of them have been measured.On concrete road, the each drawbar pull of three types increases rapidly untill slipage 30% but at more than 30%, only the drawbar pull of the rubber crawler maintainn a certain increasing slope.On hard soil-road, the each drawbar pull of three types increases gradually in proportion to slippage and the mutual difference of them is not clear.On glass land, both the iron and rubber crawlers indicate nearly equar high tractive performance and they are superior 25%-30% to pneumatic tyre in coeff. of traction. But the each drawbar pull of three types scarcely increases at more than slippage 30%. Above-mentioned results are summarized and shown in Tab. 2.It is found from Tab. 3 that the curves of force ratio tend to be similar to those of coeff. of traction and it is ascertained by Tab. 4 that the maximum drawbar HP of the pneumatic tyre is less than that of the crawler types on all tentative road.On the whole, it has been definitely know by this test that the rubber crawler has always the best tractive performance on all tentative roads.
農業機械学会の論文