| 摘要 |
FIELD: agricultural engineering. SUBSTANCE: direct drill has a toolbar with a cross-beam, carrier wheels, a cross-shaft in mesh with disk knives, and a guide-bar linked to twin-disk colters mounted behind the knives. The cross-shaft of the disk knives is provided with cantilevers joined with spring-loaded booms. The booms are in engagement with rockers of the disk knives. The rockers are articulated with the guide-bar. A hinge-joint adjusting device joins the cross-shaft of the disk knives with the cross-beam of the toolbar. EFFECT: more uniform seed placement depth. 2 cl, 4 dwg |
