JPS6441702U - - Google Patents
Info
- Publication number
- JPS6441702U JPS6441702U JP13687087U JP13687087U JPS6441702U JP S6441702 U JPS6441702 U JP S6441702U JP 13687087 U JP13687087 U JP 13687087U JP 13687087 U JP13687087 U JP 13687087U JP S6441702 U JPS6441702 U JP S6441702U
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- sends
- electric proportional
- valve
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案一実施例の構成説明図、第２図
は従来の油圧―電気コントロールシステムにおけ
るシリンダ回路の圧抜き装置の構成説明図である
。
Ａは作業機シリンダ、２，３，４，５は操作弁
、１０は可変リリーフ弁、１１は電気比例制御弁
、２２はコントローラ、２４は圧抜きスイツチ。
FIG. 1 is an explanatory diagram of the configuration of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the configuration of a pressure relief device for a cylinder circuit in a conventional hydraulic-electrical control system. A is a working machine cylinder, 2, 3, 4, and 5 are operation valves, 10 is a variable relief valve, 11 is an electric proportional control valve, 22 is a controller, and 24 is a pressure release switch.
Claims (1)
ンダに差し向ける操作弁と、この操作弁のポンプ
回路に設けられた可変リリーフ弁と、制御指令を
受けて前記操作弁に切換用のパイロツト圧を差し
向ける電気比例制御弁と、電気操作レバーの操作
により前記可変リリーフ弁に回路遮断の信号を送
ると共に電気比例制御弁に制御指令を送り且つ圧
抜きスイツチのオン作動により前記可変リリーフ
弁に回路遮断の解除指令信号を送るコントローラ
とを備えたことを特徴とする油圧―電気コントロ
ールシステムにおけるシリンダ回路の圧抜き装置
。 A control valve that directs pressure oil from the pump to the work machine cylinder by switching operation, a variable relief valve provided in the pump circuit of this control valve, and a pilot pressure for switching to the control valve in response to a control command. By operating the electric proportional control valve, the electric proportional control valve sends a circuit cutoff signal to the variable relief valve, and also sends a control command to the electric proportional control valve. A pressure relief device for a cylinder circuit in a hydraulic-electrical control system, characterized by comprising a controller that sends a release command signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13687087U JPS6441702U (en) | 1987-09-09 | 1987-09-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13687087U JPS6441702U (en) | 1987-09-09 | 1987-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6441702U true JPS6441702U (en) | 1989-03-13 |
Family
ID=31397782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13687087U Pending JPS6441702U (en) | 1987-09-09 | 1987-09-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6441702U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021021406A (en) * | 2019-07-24 | 2021-02-18 | 日立建機株式会社 | Construction machine |
-
1987
- 1987-09-09 JP JP13687087U patent/JPS6441702U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021021406A (en) * | 2019-07-24 | 2021-02-18 | 日立建機株式会社 | Construction machine |