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HOME > 農業機械  > 機械屋トラクタ目利き...  >VOL.11 ステアリ...

農業機械 | 機械屋トラクタ目利き塾

VOL.11 ステアリングとトレッド (2007/01/01)

【(株)菊地鉄工所代表 菊地治樹 -profile

ステアリング機構の進歩

今月はトラクタの操向機能であるステアリングの役割、また開発の歴史、構造の変化を見ていきたいと思う。

読者の方々はご存知のように、農業用トラクタは一般車輌と違って様々なフィールドに使用されるため、タイヤサイズ(ホイール径、タイヤ幅、タイヤラグパターン)を変えたり、トレッド(前後輪軸共)を変えたりすることによって、それらの条件に沿った仕様が用意されている。また、長い開発の歴史の中で、いかに悪条件でも、オペレータが簡単にトラクタを操作できるようにステアリング機構も進歩を遂げてきた。

自動車と同じように農業用4輪(トライサイクルという3輪に近いものも、アメリカやカナダにはあった)トラクタもごく初期の頃より手動式のステアリングホイールが装着され、それらを回転させることによってフロントタイヤの角度が変わり、方向を決定できるように設計されていたようだ。(以下つづく)
Posted by 編集部 10:28

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