JPS59163208U

JPS59163208U - hydraulic control device

Info

Publication number: JPS59163208U
Application number: JP3037084U
Authority: JP
Inventors: 和正松本
Original assignee: 三陽機器株式会社
Priority date: 1984-03-01
Filing date: 1984-03-01
Publication date: 1984-11-01

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 the drawing]

第１図は本出願人の提出した先願に係る常時開の方向制
御弁の断面図、第２図は同じく常時閉の方向制御弁、第
３図は同じく第１図及び第２図の方向制御弁を用いた油
圧制御装置の回路記号図、第４図は本考案に係る常時開
の方向制御弁の断面図、第５図は本考案に係る常時閉の
方向制御弁の断面図、第６図は本考案に係る油圧制御装
置の電気−油圧組み合わせ回路記号図、第７図及び第８
図はその作動状態を示す電気−油圧組み合わせ回路記号
図である。ＮＯ・・・常時開の方向制御弁、ＮＣ・・・常時閉の方
向制御弁、１１・・・弁本体、１２．　１３．　１４．
　１５・・・ポート、１６・・・スプール、１７・・・
スプリング、１８・・・座、２０・・・ソレノイド、２
３・・・弁本体、２４．２５．２６．２７・・・ポート
、２８・・・スプール、２９・・・スプリング、３０・
・・座、３２・・・ソレノイド。Fig. 1 is a sectional view of a normally open directional control valve according to the earlier application filed by the applicant, Fig. 2 is a normally closed directional control valve, and Fig. 3 is the same direction as in Figs. 1 and 2. 4 is a sectional view of a normally open directional control valve according to the present invention; FIG. 5 is a sectional view of a normally closed directional control valve according to the present invention; Figure 6 is a symbol diagram of the electric-hydraulic combination circuit of the hydraulic control device according to the present invention, Figures 7 and 8.
The figure is a symbolic diagram of the electric-hydraulic combination circuit showing its operating state. NO: normally open directional control valve, NC: normally closed directional control valve, 11: valve body, 12. 13. 14.
15...Port, 16...Spool, 17...
Spring, 18... Seat, 20... Solenoid, 2
3...Valve body, 24.25.26.27...Port, 28...Spool, 29...Spring, 30.
...Locus, 32...Solenoid.

Claims

[Scope of utility model registration request]

In a hydraulically operated working machine powered by an agricultural tractor that has more than one type of hydraulic actuator, each with a different purpose, three ports communicate with each other in the open position and only two ports communicate with each other in the closed position. A valve body with two sets in the same arrangement, and a spool that slides freely through the valve body, has an electromagnetic solenoid for actuation at one end, a spring for return at the other end, and operates in two positions: open and close. Two normally open control valves are used, and among the two sets of ports of each directional control valve, the open ports of each set that communicate in the closed position are connected independently for each set to provide two oil lines to the load. and a basic circuit in which, among the two sets of ports of each of the directional control valves, the closed ports of each set that close in the closed position are connected to the pump and the tank in an antisymmetrical manner for each directional control valve; , one normally closed directional control valve is used for each load device such as a double-acting cylinder, and of the two sets of ports of the directional control valve, each set of closed ports is closed in the closed position. It is connected to the two oil passages of the load equipment, and among the two sets of ports of this directional control valve, the open ports of each set that communicate in the closed position are independently connected to the two oil passages to the load of the basic circuit. Due to the load circuit,
One or more of these load devices are connected in series in the same way, and two solenoid energization switches are provided for each load device, and each switch operates the normally closed directional control valve of the load device to the open position. In addition, a hydraulic control device characterized in that only one of the two normally open directional control valves of the basic circuit is operated to the closed position at the same time.