| 摘要 |
A soil cultivating implement comprises a row of power-driven rotary soil working members 3 and a shield plate 9 arranged adjacent to each end of the row, the plate being upwardly and downwardly adjustable in position relative to a corresponding carrier 11 to match the pre-selected working depth of the members 3. The shield plates 9 co-operates with the adjacent members 3 in crumbling and distributing soil and, in order to minimise the effect of a stone or other hard object becoming momentarily trapped between one of the plates 9 and an adjacent tine 4, the carrier 11 of each shield plate 9 is movable outwardly and upwardly along a guide slot 14 against the action of a restoring spring 17 in such a way that displacement of each shield plate 9 can take place without significant tilting. If the upper and outer ends of the guide slots 14 are reached by pivot pins 13 that are slidable therealong, said shield plates 9 and carriers 11 can turn further outwardly about the axes of the pivot pins 13. An alternative embodiment is described and illustrated in which the guide slots 14 are replaced by sleeve-formation slideways movable axially along oblique guide rods against the action of restoring springs. <IMAGE> |
