| 摘要 |
PURPOSE: A three-way multifunctional valve is provided to minimize the size of a mounting block of a hydraulic valve and to function as a logic valve by rapid response and exact flow transmission. CONSTITUTION: A three-way multifunctional valve comprises a pilot valve and a main valve(14). The pilot valve switches hydraulic pressure from a pump to one of a first operation path(A) and a second operation path(B). The main valve is interlocked with the first and second operation paths to switch and output the hydraulic pressure from the pump to the first operation path or the second operation path with a cylinder(16). The main valve comprises two spool units comprising a drain cutoff spool and a pump cutoff spool(142). One end of the pump cutoff spool is sildably placed on a spring(143) which is interposed in an inner space of the drain cutoff spool. A free end(1423) of the pump cutoff spool is exposed to a first space to which the hydraulic pressure from the pump is applied. The hydraulic pressure from the pump is applied from the free end to a second space by a pump through hole(1422). |
