FIELD: machine building.
SUBSTANCE: invention relates to weighing and levelling cargo platforms and self-propelled units. Proposed drive comprises two pairs of hydraulic supports arranged at platform angles, hydraulic locks with their valve pots with hydraulic support piston chambers, restrictors, flow rate regulator and power supply communicated with inlets of three-position control valves. Note that valve pots of first pair of hydraulic supports are communicated with first inlet of first three-position control valve via two-position three-like control valves. Flow splitter and first restrictor, valve pots of hydraulic locks of second p[air of supports are communicated with first outlet of second three-position control valve via second restrictor. Second outlets of first and third three-position valves are communicated with control chambers of first pair of lock supports and rod chambers of first pair of supports and with control chambers communicated with second pair of locks and rod chambers of second pair of locks. Outlets of third three-position control valve are communicated with control chambers coupled with second pair of lock supports and two-position three-line control valves. Flow rate regulator is communicated with inlet of third three-position control valve. Note here that it comprises two two-position two-line hydraulic-control slide valves. Note that outlet of said first slide valve is communicated with line communicating flow splitter with first restrictor while its outlet is communicated with first outlet of first three-position control valve via third restrictor. Outlet of second slide valve is communicated with valve pots of locks of second pair of supports while its inlet is communicated with first outlet of second three-position control valve via fourth restrictor. Note that control chamber of first slide valve is communicated with rod chambers of second pair of supports while that of second slide valve is communicated with rod chambers of first pair of supports. Note that outlet of every slide valve is disconnected from its inlet in initial position.
EFFECT: ease of changing platform position, higher accuracy.
2 cl, 1 dwg
