| 摘要 |
A reversing and adjustment mechanism, especially for a reversible plough adapted for hydraulically adjustable furrow width and hydraulic reversing of the plough, wherein the reversing and adjustment mechanism comprises a hydraulic cylinder (8) with a "hydraulic memory" for adjustment of the furrow width. The oil chambers on both sides of the ordinary piston (15) in the adjustment cylinder (8) communicate with a reservoir (24) via two pilot-controlled check valves (26, 25) with open passage toward the adjustment cylinder (8) and a second direction-control valve (10). The chamber (31) in the adjustment cylinder (8) between the rear head and a freely movable piston (17) communicates on the one hand with a hydraulic cylinder (7) for reversing the plough, preferably with the rod end thereof, via a first check valve (14) with open passage toward the reversing cylinder (7), and on the other hand communicates with the reservoir (24) via a flow-control valve (28) and a first direction-control valve (9). The reversing cylinder (7), on the end opposite its rod; i.e., preferably on the piston end, communicates on the one hand with the rod end of the adjustment cylinder (8) via a pilot-controlled check valve (36) with open passage toward the reversing cylinder (7) and a pilot-controlled check valve (32) with open passage toward the adjustment cylinder (8), and on other hand communicates with the reservoir (24) via a pilot-controlled check valve (36), the reversible flow-control valve (28) and a first direction-control valve (9). |
