Hydraulic circuit of radio control of power shovel

摘要

(57) Abstract Objective The oil pressure due to radi-con of the small-to-medium-sized die pawa - shovelThe part is added without alteration the circuit substantially, onlyThe control with radi-con of the large-sized pawa - shovel was made possibleThing. Constitution The receiver 2 which provides the signal from of transmitter 1 in the hullReceiving, the flow of the electromagnetic proportional pressure reducing valve 3 with pilot pressureTo change, by pilot pressure of this electromagnetic proportional pressure reducing valve 3 MayChanging n direction change-over valve 4, akuchiyue - ta 5 it operatesIn the hydraulic circuit which is made the way, electromagnetic proportional pressure reducing valve 3 and MayMain direction change-over valve 4 is changed between n direction change-over valve 4,Those which provide the proportional pressure reducing valve 6 which amplifies circuit pressure. Advantages sutoro - ku of supu - ru of main direction change-over valveIt becomes operational at brief, also time lag is little. In addition,Because as for hydraulic property oil pressure of the electromagnetic proportional pressure reducing valve operates, manipulation specialAlso Characteristic to become good, furthermore as for radi-con control from small-to-medium-sized die the large-sized maSo it can use commonly.