JPH01152101U

JPH01152101U -

Info

Publication number: JPH01152101U
Application number: JP4942188U
Authority: JP
Priority date: 1988-04-12
Filing date: 1988-04-12
Publication date: 1989-10-20

Description

[Brief explanation of the drawing]

第１図〜第４図は本考案に係る図であり、第１
図は本考案の主要構成図、第２図は油圧方向切換
弁の一実施例を示す要部断面図、第３図はシヤト
ル弁の第２図―線矢視断面図、第４図は本発
明に係る油圧方向切換弁の使用例を示す油圧回路
図、第５図は従来例に係る第４図対応図である。１０……電磁制御パイロツト操作式油圧方向切
換弁、１２……メインスプール弁体、１３……復
帰用ばね、１４……パイロツト油室、１５……パ
イロツト弁、１６……パイロツトスプール弁体、
１７……パイロツト入口、１８……絞り通路、１
９……ソレノイド、２０……シヤトル弁、２１，
２２……シヤトル弁入口、２３……シヤトル弁出
口、Ａ，Ｂ……作業ポート、Ｐ……圧力ポート、
Ｔ……タンクポート、Ｓ……復帰位置、Ｌ，Ｒ…
…操作位置。 Figures 1 to 4 are diagrams related to the present invention, and the first
Figure 2 is a main configuration diagram of the present invention, Figure 2 is a cross-sectional view of essential parts showing an embodiment of a hydraulic directional valve, Figure 3 is a cross-sectional view of the shuttle valve taken along the line shown in Figure 2, and Figure 4 is a cross-sectional view of the shuttle valve. A hydraulic circuit diagram showing an example of use of the hydraulic directional control valve according to the invention, FIG. 5 is a diagram corresponding to FIG. 4 according to a conventional example. 10...Electromagnetic control pilot operated hydraulic directional valve, 12...Main spool valve body, 13...Return spring, 14...Pilot oil chamber, 15...Pilot valve, 16...Pilot spool valve body,
17... Pilot inlet, 18... Throttle passage, 1
9...Solenoid, 20...Shuttle valve, 21,
22...Shuttle valve inlet, 23...Shuttle valve outlet, A, B...Work port, P...Pressure port,
T...Tank port, S...Return position, L, R...
...Operating position.

Claims

[Scope of Claim for Utility Model Registration] The main valve body 12 of the electromagnetic pilot-operated hydraulic directional control valve 10 is returned to the return position S by the return spring 13, and is moved to the operating positions L and R by the hydraulic pressure of the pilot oil chamber 14. The pilot oil chamber 14 communicates with the pressure port P via the pilot valve 15, and also communicates with the tank port T via the passage 18 and the throttle hole 18a, so that the pilot valve body of the pilot valve 15 can be operated. In the electromagnetic pilot-operated hydraulic directional valve configured to be open/close controlled by a solenoid 19, a shuttle valve 20 is interposed between the pilot inlet 17 of the pilot valve 15 and the pressure port P, and one shuttle valve inlet of the shuttle valve 20 is connected to the pilot inlet 17 of the pilot valve 15. 21 is connected to the pressure port P, and the other shuttle valve inlet 22 is connected to the work ports A and B, and the shuttle valve outlet 23 is connected to the pilot inlet 17 of the pilot valve 15.
An electromagnetic pilot-operated hydraulic directional control valve, characterized in that it is configured to communicate with the electromagnetic pilot operated hydraulic directional valve.