JPS5891003U - Hydraulic circuit that remotely controls the switching valve - Google Patents
Hydraulic circuit that remotely controls the switching valveInfo
- Publication number
- JPS5891003U JPS5891003U JP18770581U JP18770581U JPS5891003U JP S5891003 U JPS5891003 U JP S5891003U JP 18770581 U JP18770581 U JP 18770581U JP 18770581 U JP18770581 U JP 18770581U JP S5891003 U JPS5891003 U JP S5891003U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pump
- relief valve
- pressure
- hydraulic circuit
- 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
Landscapes
- Fluid-Pressure Circuits (AREA)
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
図面第１図は従来の回路図、第２図はこの考案の１実施
例を示す回路図である。
１．２・・・メインポンプたる第１．２ポンプ、４〜６
．８〜１０・・・切換弁、１１．１２・・・オリフィス
、１３，１４・・・低圧リリーフ弁、１７−・・エンジ
ン、１８・・・サブポンプ、２０・・・パイ１０ツトバ
ルブ、２１・・・パイロット室、２２・・・リリーフ弁
、２３−・・アンロード弁、２４・・・タンク通路、２
５・・・背圧弁。FIG. 1 is a conventional circuit diagram, and FIG. 2 is a circuit diagram showing an embodiment of this invention. 1.2... Main pump 1.2 pump, 4 to 6
．． 8-10...Switching valve, 11.12...Orifice, 13,14...Low pressure relief valve, 17-...Engine, 18...Sub pump, 20...Pipe 10 valve, 21...・Pilot room, 22... Relief valve, 23-... Unload valve, 24... Tank passage, 2
5... Back pressure valve.
Claims (1)
換弁の中立流路のアウト側に、オリフィスと低圧リリー
フ弁とをパラレルに接続し、そのオリフィスを通過する
流量に応じて、上記低圧リリーフ弁の設定圧以下のネガ
ティブ信号圧を発生させるとともに、このネガティブ信
号圧が低くなればなるほど吐出量を増大させるメインポ
ンプを設ける一方、このメインポンプとエンジンを共通
にしたサブポンプを設け、このサブポンプからのパイロ
ット圧を、パイロットバルブを介して所望の切換弁のパ
イロット室に導く構成にし、かつサブポンプとパイロッ
トバルブとの間にリリーフ弁を設けた油圧回路において
、前記ネガティブ信号圧が最大のときにのみ開位置を保
持するアンロード弁を前記リリーフ弁に接続する一方、
このリリーフ弁のピンク通路には、多少の背圧を発生さ
せる背圧弁を設けた切換弁をリモートコントロールする
油圧回路。An orifice and a low pressure relief valve are connected in parallel to the outside of the neutral flow path of the most downstream switching valve to be remotely controlled, and the low pressure relief valve is adjusted according to the flow rate passing through the orifice. A main pump is provided that generates a negative signal pressure below the set pressure and increases the discharge amount as the negative signal pressure becomes lower.A sub-pump that shares an engine with this main pump is provided, and a pilot pump from this sub-pump is provided. In a hydraulic circuit configured to lead pressure to the pilot chamber of a desired switching valve via a pilot valve and provided with a relief valve between the sub-pump and the pilot valve, the open position is established only when the negative signal pressure is at its maximum. while connecting an unload valve holding the relief valve to the relief valve;
The pink passage of this relief valve is a hydraulic circuit that remotely controls a switching valve equipped with a back pressure valve that generates some back pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18770581U JPS5891003U (en) | 1981-12-16 | 1981-12-16 | Hydraulic circuit that remotely controls the switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18770581U JPS5891003U (en) | 1981-12-16 | 1981-12-16 | Hydraulic circuit that remotely controls the switching valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5891003U true JPS5891003U (en) | 1983-06-20 |
Family
ID=29990737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18770581U Pending JPS5891003U (en) | 1981-12-16 | 1981-12-16 | Hydraulic circuit that remotely controls the switching valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5891003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01242801A (en) * | 1988-03-23 | 1989-09-27 | Hitachi Constr Mach Co Ltd | Hydraulic pressure drive unit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620809A (en) * | 1979-07-27 | 1981-02-26 | Daikin Ind Ltd | Fluid control system |
-
1981
- 1981-12-16 JP JP18770581U patent/JPS5891003U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620809A (en) * | 1979-07-27 | 1981-02-26 | Daikin Ind Ltd | Fluid control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01242801A (en) * | 1988-03-23 | 1989-09-27 | Hitachi Constr Mach Co Ltd | Hydraulic pressure drive unit |
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