JPS62163304U - - Google Patents
Info
- Publication number
- JPS62163304U JPS62163304U JP4936286U JP4936286U JPS62163304U JP S62163304 U JPS62163304 U JP S62163304U JP 4936286 U JP4936286 U JP 4936286U JP 4936286 U JP4936286 U JP 4936286U JP S62163304 U JPS62163304 U JP S62163304U
- Authority
- JP
- Japan
- Prior art keywords
- load holding
- holding circuit
- pressure
- hydraulic cylinder
- valve
- 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
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
Description
図は本考案の実施例を示す油圧回路図である。
１……主油圧ポンプ、３……方向制御弁、４，
６……負荷保持回路、５……カウンタバランス弁
、７……油圧シリンダ、７ａ……負荷保持側油室
、１２……回路（初期圧力取出し用）、１３……
第１蓄圧器、１４……パイロツトチエツク弁、１
５……補助油圧ポンプ、１７……アンロード弁、
１９……第２蓄圧器（補助油圧源）、２０……切
替弁、２１……パイロツト回路、２３……圧力比
例減圧弁、２４……パイロツト回路、２５……チ
エツク弁。
The figure is a hydraulic circuit diagram showing an embodiment of the present invention. 1... Main hydraulic pump, 3... Directional control valve, 4,
6...Load holding circuit, 5...Counter balance valve, 7...Hydraulic cylinder, 7a...Load holding side oil chamber, 12...Circuit (for initial pressure extraction), 13...
First pressure accumulator, 14...Pilot check valve, 1
5...Auxiliary hydraulic pump, 17...Unload valve,
19...Second pressure accumulator (auxiliary hydraulic pressure source), 20...Switching valve, 21...Pilot circuit, 23...Pressure proportional pressure reducing valve, 24...Pilot circuit, 25...Check valve.
Claims (1)
圧シリンダの両側の油室に対する圧油の給排を制
御する方向制御弁と、上記油圧シリンダの負荷保
持側油室と方向制御弁との間に設けられた負荷保
持回路と、負荷保持回路に設けられたカウンタバ
ランス弁と、補助油圧源と、上記油圧シリンダを
停止させたときの負荷保持回路の初期圧力を取出
して記憶する初期圧力記憶手段と、この初期圧力
記憶手段からの信号によつて作動されかつ上記初
期圧力に対応した圧力を上記負荷保持回路に導く
比例減圧弁と、この比例減圧弁の一次側をタンク
に連通させる状態と補助油圧源に連通させる状態
とに切替える切替弁を具備していることを特徴と
する油圧シリンダの制御回路。 A main hydraulic power source, a hydraulic cylinder, a directional control valve that controls the supply and discharge of pressure oil from the main hydraulic power source to the oil chambers on both sides of the hydraulic cylinder, and between the load holding side oil chamber of the hydraulic cylinder and the directional control valve. a load holding circuit provided in the load holding circuit, a counterbalance valve provided in the load holding circuit, an auxiliary hydraulic pressure source, and an initial pressure storage means for extracting and storing the initial pressure of the load holding circuit when the hydraulic cylinder is stopped. , a proportional pressure reducing valve which is activated by a signal from the initial pressure storage means and which guides the pressure corresponding to the initial pressure to the load holding circuit, and a state and auxiliary device that communicates the primary side of the proportional pressure reducing valve with the tank. 1. A control circuit for a hydraulic cylinder, comprising a switching valve for switching between a state in which the cylinder is in communication with a hydraulic power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4936286U JPS62163304U (en) | 1986-04-02 | 1986-04-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4936286U JPS62163304U (en) | 1986-04-02 | 1986-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62163304U true JPS62163304U (en) | 1987-10-17 |
Family
ID=30871743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4936286U Pending JPS62163304U (en) | 1986-04-02 | 1986-04-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62163304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012122495A (en) * | 2010-12-06 | 2012-06-28 | Caterpillar Sarl | Hydraulic circuit provided with accumulator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58121306A (en) * | 1982-01-11 | 1983-07-19 | Kobe Steel Ltd | Hydraulic circuit for maintaining expansion and contraction of hydraulic cylinder |
| JPS5950208A (en) * | 1982-09-17 | 1984-03-23 | Tadano Tekkosho:Kk | Device for generating emergency signal showing stopped condition in hydraulic cylinder |
-
1986
- 1986-04-02 JP JP4936286U patent/JPS62163304U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58121306A (en) * | 1982-01-11 | 1983-07-19 | Kobe Steel Ltd | Hydraulic circuit for maintaining expansion and contraction of hydraulic cylinder |
| JPS5950208A (en) * | 1982-09-17 | 1984-03-23 | Tadano Tekkosho:Kk | Device for generating emergency signal showing stopped condition in hydraulic cylinder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012122495A (en) * | 2010-12-06 | 2012-06-28 | Caterpillar Sarl | Hydraulic circuit provided with accumulator |
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