| 摘要 |
FIELD: agricultural engineering. SUBSTANCE: harrow has frame with longitudinal bars and working tool sections connected to bars by rollers and vertical pivot joints. Rollers are made in the form of truncated cone whose top is positioned on pin of vertical pivot joint connecting middle longitudinal bar and section so that cone generatrix is extending tangentially to bar surface. EFFECT: increased efficiency and simplified construction. 3 dwg |
