JPS6132602U - Hydraulic cylinder control device for hydraulically driven gripping machine - Google Patents
Hydraulic cylinder control device for hydraulically driven gripping machineInfo
- Publication number
- JPS6132602U JPS6132602U JP11609084U JP11609084U JPS6132602U JP S6132602 U JPS6132602 U JP S6132602U JP 11609084 U JP11609084 U JP 11609084U JP 11609084 U JP11609084 U JP 11609084U JP S6132602 U JPS6132602 U JP S6132602U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- flow path
- hydraulic cylinder
- side flow
- relief 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
Landscapes
- Load-Engaging Elements For Cranes (AREA)
- Control And Safety Of Cranes (AREA)
- Servomotors (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (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
第１図は本考案の実施の一例を示す油圧回路図、第２図
は従来の装置の一例を示す油圧回路図である。
１０ａ，１０ｂ・・・・・・油圧シリンダー、１１，１
２・・・・・・注排流路、１３・・・・・・切換弁、１
４・・・・・・加圧側流路、１４ａ，１４ｂ・・・・・
・ポンプ送油路、１５・・・・・・減圧側流路、１６・
・・・・・オイルタンク、２３・・・・・・メインリリ
ーフ弁、２ ４−−−−−−アンロードリリーフ弁。FIG. 1 is a hydraulic circuit diagram showing an example of the implementation of the present invention, and FIG. 2 is a hydraulic circuit diagram showing an example of a conventional device. 10a, 10b... Hydraulic cylinder, 11, 1
2...Injection/discharge channel, 13...Switching valve, 1
4... Pressure side flow path, 14a, 14b...
・Pump oil supply path, 15...Reduction side flow path, 16・
... Oil tank, 23 ... Main relief valve, 2 4 --- Unload relief valve.
Claims (1)
連通させた一対の注排流路に、加圧側流路及び減圧側流
路を切換連通させる切換弁を備え、前記加圧側流路に送
油ポンプを備えるとともに該加圧側流路と前記減圧側流
路との間に、該加圧側流路内が所定圧以上になったとき
に開放されるメインリリーフ弁を備えてなる油圧駆動式
掴み機の油圧シリンダー制御装置において、前記加圧側
流路はそれぞれ別々の送油ポンプを備えた一対の第一、
第二ポンプ送油路を有し、その第一ポンプ送油路と前記
減圧側流路間に、前記加圧側流路内があらかじめ設定し
た圧力以上になったときに無負荷の状態に開放されるア
ンロードリリーフ弁を備え、該アンロードリリーフ弁の
リリーフ設定圧を前記メインリリーフ弁のリリーフ設定
圧より低く設定し、前記加圧側流路内があらかじめ設定
したアンロードリリーフ弁のリリーフ設定圧以上に上昇
したとき、第二ポンプ送油路からの送油のみにより前記
油圧シリンダーを駆動させるようにしたことを特徴とし
てなく油圧駆動式掴み機の油圧シリンダー制御装置。A pair of injection/discharge channels communicating with both ends of a hydraulic cylinder for opening/closing operation of a hydraulically driven gripping machine is provided with a switching valve for switching communication between a pressure side channel and a pressure reduction side channel, and a switching valve is provided for switching communication between a pressure side channel and a pressure reduction side channel. A hydraulically driven grip comprising an oil pump and a main relief valve between the pressure side flow path and the pressure reduction side flow path, which is opened when the inside of the pressure side flow path reaches a predetermined pressure or higher. In the hydraulic cylinder control device of the machine, the pressurizing side flow path has a pair of first and second flow paths each equipped with a separate oil feed pump.
A second pump oil feed path is provided between the first pump oil feed path and the pressure reducing side flow path, which is opened to a no-load state when the pressure in the pressurization side flow path exceeds a preset pressure. an unload relief valve, the relief setting pressure of the unload relief valve is set lower than the relief setting pressure of the main relief valve, and the inside of the pressure side flow path is higher than the preset relief setting pressure of the unload relief valve. 1. A hydraulic cylinder control device for a hydraulically driven gripping machine, wherein the hydraulic cylinder is driven only by oil sent from a second pump oil supply path when the gripping machine rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11609084U JPS6132602U (en) | 1984-07-31 | 1984-07-31 | Hydraulic cylinder control device for hydraulically driven gripping machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11609084U JPS6132602U (en) | 1984-07-31 | 1984-07-31 | Hydraulic cylinder control device for hydraulically driven gripping machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6132602U true JPS6132602U (en) | 1986-02-27 |
Family
ID=30675039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11609084U Pending JPS6132602U (en) | 1984-07-31 | 1984-07-31 | Hydraulic cylinder control device for hydraulically driven gripping machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6132602U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55163303A (en) * | 1979-05-31 | 1980-12-19 | Kayaba Ind Co Ltd | Circuit of increasing flow rate |
-
1984
- 1984-07-31 JP JP11609084U patent/JPS6132602U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55163303A (en) * | 1979-05-31 | 1980-12-19 | Kayaba Ind Co Ltd | Circuit of increasing flow rate |
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