| 摘要 |
<p>The present invention relates to an electromagnetic type proportional pressure reducing valve which controls supplying of pressure oil to various hydraulic actuators. According to the present invention, a control valve is constructed such that a spool (22) is fitted into a spool bore (21) opened to end faces (20a, 20b) of a valve body (2), and spring casings (27) comprising a casing body (27a) having a blind hole (28) and a housing (27b) having a spool bore (31) for a reducing valve are mounted on the end faces (20a, 20b) in a manner to make the spool bore (21) and the blind holes (28) aligned with each other to define pressure receiving chambers (30) between the inner wall of the blind holes (28) and the spool (22), and an electromagnetic type proportional pressure reducing valve (37) is constructed such that spool (32) for a reducing valve are fitted into the spool bores (31) for a reducing valve and solenoids (36) for a reducing valve are mounted on the housings (27b). Outlet ports (35) of the electromagnetic type proportional pressure reducing valve (37) are allowed to communicate with the pressure receiving chambers (30). Thus, a single valve body can be used both for an electromagnetic type proportional pressure reducing valve and a conventional control valve.</p> |
