AGRICULTURE MACHINARY OIL PRESSURE CIRCUIT RELATION OF HORIZENTAL CONTROL AND LIFTING FOR TRACTOR

摘要

An oil-hydraulic circuit related with horizontal control and elevation of the working machine is provided, which enables to supply hydraulic oil provided from the hydraulic feeding unit to the elevation control unit. An oil-hydraulic circuit related with horizontal control and elevation of the working machine comprises: a hydraulic feeding unit(1) including the oil tank(10) and hydraulic pump; a horizontal control cylinder(2) controlling the leveling of the working machine about the working object surface; a horizontal control valve(3) consisting of a plurality of solenoid valves; a controller(4) controlling the operation of the horizontal control valve; a pair of elevating cylinders(5); and an elevation control device(6) which is branched from the hydraulic line facing the horizontal control valve from the hydraulic feeding unit.