Theoretical Approach to the Hand Tractor of Rotary Tillage

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X

 In this report, three important principles for designing rotary knives are analyzed and explained with the conceptional experiment data of rotary knives.
 One of them is angle β1, which is the rake angle between the rotor radius direction and the tangential line of tip-outside surface of the knife. β1 can be designed with the value of more than 45° to less than 80°, which gives throwing action to the clods, depending on soil and machine conditions.
 The other is the edge curve of the knife. This has influences on the entwining of grass and straw around the blades and rotary axle, and the tilling resistance. The angle Φ1 between the radius direction and the tangential line to the edge curve is important to know its characteristics. Less entwining occurs when Φ1 is more than 57° and greater entwining occurs when Φ1 is less than 57°.
 The third point is the section shape of the knife. This is related to the value of the frictional resistance between the knife and the untilled soil.

国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 40
終了ページ 47
言語 eng