FIELD: agricultural engineering.
SUBSTANCE: apparatus has frame 1 and rotary hoe 2 mounted on frame 1 and controlled by means of hydraulic drive cylinder 3, double-arm probe 4 biased by spring 5 to adjustable stop 6, hydraulic pipelines 7, 8, and valve-type hydraulic distributor 9 rigidly mounted on tine of rotary hoe 2. Hydraulic distributor 9 has casing, closure and slide valve. Hydraulic distributor casing is equipped with two openings. Conical slots are formed in pressure cavity 13 and drain cavity 14 of hydraulic distributor. Slide valve has conical connecting webs defining gaps symmetrical with respect to axis of symmetry and developed into horizontal plane. Two other openings of casing are communicated via hydraulic pipelines 7, 8 with hydraulic drive cylinder 3. Two marks are indicated on closure, namely R (right-hand hydraulic distributor) and L (left-hand hydraulic distributor), said marks being equally spaced from closure axis, and mark M is applied to slide valve pin.
EFFECT: simplified construction of hydraulic distributor and increased efficiency of apparatus.
3 cl, 3 dwg
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