AGRICULTURAL UNIT Russian patent published in 1997 - IPC

FIELD: agricultural engineering. SUBSTANCE: soil tillage unit has hydraulic drive with hydraulic tank 34, hydraulic pump 36, filter 39, main hydraulic distributor 37, hydraulic power cylinder 45 for lifting hydraulic hitching mechanism 2 with tool 3, compact three-positional four-way hydraulic distributing unit 8 having follower hydraulic distributor 9-tilling depth sensor, locking valve 12 and draft force sensor 10, pressure gage 33, draft loading sensor and high-speed zone sensor, working cavity hydraulic gate 44, unit having carrier wheel 5 with sweeper 6 and mechanism 7 for preadjustment of soil tilling depth, gear box kinematically connected through positioning lever 23 with slide 22 of follower hydraulic distributor 9. When hydraulic hitching mechanism 2 of vehicle 1 is lowered, oil is supplied from hydraulic tank 34 by pump 36 through main hydraulic distributor 37 into cavity of charging device 10 and draft force sensor and into follower hydraulic distributor 9, slide valve of hydraulic distributor in its initial position provides passage of oil through main via hydraulic gate 44 into piston cavity of hydraulic power cylinder 45. Oil is drained from stem cavity of hydraulic power cylinder 45 through main via hydraulic gate 44 and follower hydraulic distributor 9, through hydraulic pipelines extending through main hydraulic distributor 37 and hydraulic filter 39 into hydraulic tank 34. Four-way hydraulic distributing unit 8 is positioned in longitudinal axis of symmetry 26 of fingers 16,19 for pivotal connection of mechanism 2 with working tool 3. EFFECT: simplified construction, increased economy and enhanced reliability in operation. 2 dwg