FIELD: machine building.
SUBSTANCE: device (20, 20A–20F) for hydraulic (pneumatic) cylinder drive includes switching valve (24), high pressure air supply source (26), exhaust port (28) and check valve (30). When switching valve (24) is in the first position, cylinder chamber (42) on the side of the head communicates with the high pressure air supply (26), and cylinder chamber (44) on rod side communicates with exhaust port (28). When switching valve (24) is in second position, cylinder chamber (42) on head side communicates with cylinder chamber (44) on rod side via check valve (30) and cylinder chamber (42) on head side communicates with exhaust port (28).
EFFECT: technical result is energy saving, reduced time of drive return, simplified design.
14 cl, 11 dwg
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