JPH0246181U

JPH0246181U -

Info

Publication number: JPH0246181U
Application number: JP12549388U
Authority: JP
Priority date: 1988-09-26
Filing date: 1988-09-26
Publication date: 1990-03-29

Description

[Brief explanation of drawings]

図面第１〜４図はこの考案の実施例を示すもの
で、第１図は断面図、第２〜４図は制御特性を示
すグラフ、第５図は減圧弁と方向切換弁とを別々
した従来例の断面図である。１１……本体、１２……ポンプポート、１３，
１４……アクチユエータポート、１７……メイン
スプール、１８，１９……パイロツト室、２５，
２６……導入通路、２７……パイロツトスプール
、２９……ソレノイド、３８，３９……パイロツ
ト通路、４０，４１……シヤトル弁。 Figures 1 to 4 show an embodiment of this invention; Figure 1 is a sectional view, Figures 2 to 4 are graphs showing control characteristics, and Figure 5 shows a pressure reducing valve and a directional control valve separated. It is a sectional view of a conventional example. 11...Main body, 12...Pump port, 13,
14... Actuator port, 17... Main spool, 18, 19... Pilot chamber, 25,
26...Introduction passage, 27...Pilot spool, 29...Solenoid, 38, 39...Pilot passage, 40, 41...Shuttle valve.

Claims

[Scope of utility model registration request]

A main body forming a pump port and a pair of actuator ports, a main spool that is housed inside the main body and has both ends facing a pilot chamber, and an introduction passage that communicates the pilot chamber with the actuator port. , a pilot spool that guides the pressure fluid of the pump port to one of the pilot chambers via the pilot passage, a solenoid that controls the switching position of the pilot spool, and a solenoid provided at the confluence of the pilot passage and the introduction passage. The pressure in one pilot chamber is controlled according to the switching position of the pilot spool, while the load pressure on the actuator port side is guided to the other pilot chamber. valve.