JPS58137104U

JPS58137104U - composite control valve

Info

Publication number: JPS58137104U
Application number: JP3403482U
Authority: JP
Inventors: 松永　千春; 月本　年明
Original assignee: 東芝機械株式会社
Priority date: 1982-03-10
Filing date: 1982-03-10
Publication date: 1983-09-14

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案による一実施例を示す断面図、第２図は
第１図の■−■線の断面図である。１・・・複合制御弁、３・・・流入ポート、４・・・流
出ポート、５・・・センタバイパス通路、６・・・合流
ポート、ｐｌ、ｐ２・・・ポンプ、７，８・・・上流側
切換弁、１３．１４・・・下流側切換弁、９，１０．１
５・・・パラレル供給通路、１６・・・通路、２２・・
・逆止弁。FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. DESCRIPTION OF SYMBOLS 1... Composite control valve, 3... Inflow port, 4... Outflow port, 5... Center bypass passage, 6... Merging port, pl, p2... Pump, 7, 8...・Upstream switching valve, 13.14...Downstream switching valve, 9, 10.1
5... Parallel supply passage, 16... Passage, 22...
·non-return valve.

Claims

[Scope of utility model registration request]

It has a center bypass passage that bypasses the oil discharged from the pump P1 from the inflow port to the outflow port, and has a merging port that merges the oil discharged from the pump P2 from the middle of this center bypass passage, and the oil flows in from the merging point of the merging port. A complex consisting of a plurality of upstream switching valves located on the port side and having parallel supply passages on the left and right sides, and a plurality of downstream switching valves located on the outflow port side from the confluence point and having a parallel supply passage on only one side. In the control valve, when the downstream switching valve is operated alone, operating the switching valve in one direction connects the parallel supply passage to the center bypass passage via the switching valve spool outer passage, and operating the switching valve in the other direction connects the parallel supply passage to the center bypass passage. The parallel supply passage is communicated with the center bypass passage through a restriction in the switching valve spool, and when the downstream and upstream switching valves are operated in combination, the downstream switching valve is operated in one direction or the other. A check valve is interposed in the parallel supply passage so that the oil of pump P2 does not flow backwards to the upstream switching valve, and the oil of pump P1 can be removed by operating only the other direction of the upper and downstream switching valves. A composite control valve characterized in that oil is passed through a downstream switching valve through a throttle.