JPS63125205U - - Google Patents
Info
- Publication number
- JPS63125205U JPS63125205U JP1655087U JP1655087U JPS63125205U JP S63125205 U JPS63125205 U JP S63125205U JP 1655087 U JP1655087 U JP 1655087U JP 1655087 U JP1655087 U JP 1655087U JP S63125205 U JPS63125205 U JP S63125205U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- control valve
- hydraulic
- actuator
- source
- 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
- 239000012530 fluid Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第1図は、この考案の実施例に係る油圧回路図
、第2図は、従来例に係る油圧回路図である。
1……駆動用油圧ポンプ、2,3……シリンダ
、4……油圧モータ、5,6,7……方向切換弁
、8,9……リリーフ弁、10……パイロツト用
油圧ポンプ、25……パイロツト管路、27……
管路。
FIG. 1 is a hydraulic circuit diagram according to an embodiment of this invention, and FIG. 2 is a hydraulic circuit diagram according to a conventional example. DESCRIPTION OF SYMBOLS 1... Hydraulic pump for drive, 2, 3... Cylinder, 4... Hydraulic motor, 5, 6, 7... Directional switching valve, 8, 9... Relief valve, 10... Hydraulic pump for pilot, 25... ...Pilot conduit, 27...
conduit.
Claims (1)
を供給する駆動用液圧源と、この駆動用液圧源か
らアクチユエータに供給される圧液の方向を制御
する方向制御弁と、回路内の圧力を少なくとも低
圧側と高圧側の二つの設定値にそれぞれ保持する
少なくとも二つの圧力制御弁と、これらの圧力制
御弁を介して上記二つの設定値のいずれか一方を
選択する選択手段とを備えた液圧回路において、
外部液圧源と、この外部液圧源と低圧側の設定値
に保持する圧力制御弁とを連通し、該圧力制御弁
に対して該設定値に保持するための弁作動を阻止
する圧力を上記液圧源から導入可能な管路と、こ
の管路に介在して該圧力の導入の可否を設定する
弁手段とを備えていることを特徴とする液圧回路
。 An actuator, a drive hydraulic pressure source that supplies pressure fluid to the actuator, a direction control valve that controls the direction of the pressure fluid supplied from the drive hydraulic pressure source to the actuator, and a control valve that controls the pressure in the circuit at least on the low pressure side. and a hydraulic circuit comprising at least two pressure control valves each holding the pressure at two set values on the high pressure side, and selection means for selecting one of the two set values via these pressure control valves. ,
An external hydraulic pressure source is communicated with a pressure control valve to be maintained at a set value on the low pressure side, and a pressure is applied to the pressure control valve to prevent valve operation to be maintained at the set value. A hydraulic circuit comprising: a pipe line that can be introduced from the hydraulic pressure source; and a valve means that is interposed in the pipe line and sets whether or not the pressure can be introduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1655087U JPS63125205U (en) | 1987-02-09 | 1987-02-09 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1655087U JPS63125205U (en) | 1987-02-09 | 1987-02-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63125205U true JPS63125205U (en) | 1988-08-16 |
Family
ID=30808510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1655087U Pending JPS63125205U (en) | 1987-02-09 | 1987-02-09 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63125205U (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4931118U (en) * | 1972-06-17 | 1974-03-18 | ||
JPS5419514U (en) * | 1977-07-11 | 1979-02-08 | ||
JPS6133334U (en) * | 1984-07-31 | 1986-02-28 | エスエムケイ株式会社 | push button switch |
JPS6179002A (en) * | 1984-09-25 | 1986-04-22 | Daikin Ind Ltd | Pressure control circuit for relief valve |
-
1987
- 1987-02-09 JP JP1655087U patent/JPS63125205U/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4931118U (en) * | 1972-06-17 | 1974-03-18 | ||
JPS5419514U (en) * | 1977-07-11 | 1979-02-08 | ||
JPS6133334U (en) * | 1984-07-31 | 1986-02-28 | エスエムケイ株式会社 | push button switch |
JPS6179002A (en) * | 1984-09-25 | 1986-04-22 | Daikin Ind Ltd | Pressure control circuit for relief valve |
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