JPH0187302U - - Google Patents
Info
- Publication number
- JPH0187302U JPH0187302U JP18478787U JP18478787U JPH0187302U JP H0187302 U JPH0187302 U JP H0187302U JP 18478787 U JP18478787 U JP 18478787U JP 18478787 U JP18478787 U JP 18478787U JP H0187302 U JPH0187302 U JP H0187302U
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- tank
- valve
- pilot
- type switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Description
第１図は本考案の実施例の油圧回路図、第２図
は従来装置の油圧回路図である。
１……液圧ポンプ、３……作動シリンダ、４，
５……液室、７……パイロツト式切換弁、９……
リリーフ弁、１４……ロジツク弁、１５……ばね
室、１７……スプリングセツトパイロツト式切換
弁、２６……パイロツト手段。
FIG. 1 is a hydraulic circuit diagram of an embodiment of the present invention, and FIG. 2 is a hydraulic circuit diagram of a conventional device. 1... Hydraulic pump, 3... Working cylinder, 4,
5...Liquid chamber, 7...Pilot type switching valve, 9...
Relief valve, 14... logic valve, 15... spring chamber, 17... spring set pilot type switching valve, 26... pilot means.
Claims (1)
より液圧ポンプとタンクに選択的に接続し、パイ
ロツト式切換弁と作動シリンダの一方の液室とを
つなぐ流路に配設したロジツク弁のばね室を、パ
イロツト式切換弁と連動するスプリングセツトパ
イロツト式切換弁により、パイロツト式切換弁が
中立位置から機能位置へ切換わるときにはタンク
に接続し、パイロツト式切換弁が機能位置から中
立位置へ切換わるときには前記一方の液室に接続
するようにした作動シリンダ制御装置において、
スプリングセツトパイロツト式切換弁に、前記一
方の液室の圧力がロジツク弁とパイロツト式切換
弁との間に介装する既設リリーフ弁の設定圧力よ
りも高い所定圧力を越えるとロジツク弁のばね室
をタンクに連通せしめるパイロツト手段を付設し
たことを特徴とする作動シリンダ制御装置。 Both liquid chambers of the operating cylinder are selectively connected to the hydraulic pump and tank by a pilot type switching valve, and the spring chamber of the logic valve is arranged in the flow path connecting the pilot type switching valve and one of the liquid chambers of the operating cylinder. is connected to the tank when the pilot operated switching valve is switched from the neutral position to the functional position, and connected to the tank when the pilot operated switching valve is switched from the functional position to the neutral position. In the actuating cylinder control device connected to the one liquid chamber,
In a spring set pilot type switching valve, when the pressure in one of the liquid chambers exceeds a predetermined pressure higher than the set pressure of the existing relief valve interposed between the logic valve and the pilot type switching valve, the spring chamber of the logic valve is closed. An operating cylinder control device characterized in that it is equipped with a pilot means for communicating with a tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18478787U JPH0187302U (en) | 1987-12-02 | 1987-12-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18478787U JPH0187302U (en) | 1987-12-02 | 1987-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0187302U true JPH0187302U (en) | 1989-06-09 |
Family
ID=31699769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18478787U Pending JPH0187302U (en) | 1987-12-02 | 1987-12-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0187302U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007162947A (en) * | 2005-12-12 | 2007-06-28 | Linde Material Handling Gmbh & Co Kg | Control valve device for controlling consuming device |
-
1987
- 1987-12-02 JP JP18478787U patent/JPH0187302U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007162947A (en) * | 2005-12-12 | 2007-06-28 | Linde Material Handling Gmbh & Co Kg | Control valve device for controlling consuming device |