JPS646401U - - Google Patents
Info
- Publication number
- JPS646401U JPS646401U JP10098887U JP10098887U JPS646401U JP S646401 U JPS646401 U JP S646401U JP 10098887 U JP10098887 U JP 10098887U JP 10098887 U JP10098887 U JP 10098887U JP S646401 U JPS646401 U JP S646401U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- valve
- switching valve
- oil chambers
- pressure
- 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
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Description
第１図はこの考案の一実施例を示す油圧回路図
、第２図は従来の油圧回路図である。
１：可変容量形ポンプ、３：パイロツト切換弁
、４：アクチユエータ、５：パイロツト油圧源（
パイロツトポンプ）、６：パイロツトバルブ、７
ａ，７ｂ：パイロツト油室、８ａ，８ｂ：パイロ
ツト管路、１０：リリーフ弁、１１：戻り管路、
１２：ＯＮ―ＯＦＦ切換弁、１３ａ，１３ｂ：分
岐管路、１４：シヤトル弁。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of this invention, and FIG. 2 is a conventional hydraulic circuit diagram. 1: Variable displacement pump, 3: Pilot switching valve, 4: Actuator, 5: Pilot hydraulic power source (
Pilot pump), 6: Pilot valve, 7
a, 7b: Pilot oil chamber, 8a, 8b: Pilot pipe line, 10: Relief valve, 11: Return pipe line,
12: ON-OFF switching valve, 13a, 13b: branch pipe, 14: shuttle valve.
Claims (1)
ト管路を介してパイロツトバルブからのパイロツ
ト圧を給・排することによつて、ブーム等のアク
チユエータを操作するパイロツト操作式油圧回路
において、パイロツト切換弁３のパイロツト油室
７ａ，７ｂを夫々パイロツトバルブ６を介してパ
イロツト油圧源５に接続すると共に、パイロツト
油圧源５からのパイロツト圧を制御するリリーフ
弁１０の戻り管路１１をＯＮ―ＯＦＦ切換弁１２
を介してパイロツト油室７ａ，７ｂに夫々接続し
、かつ、パイロツト油室７ａ，７ｂとパイロツト
バルブ６とを接続するパイロツト管路８ａ，８ｂ
から夫々分岐した分岐管路１３ａ，１３ｂをシヤ
トル弁１４を介して前記ＯＮ―ＯＦＦ切換弁１２
のパイロツト油室１５に接続したことを特徴とす
るパイロツト操作式油圧回路。 In a pilot-operated hydraulic circuit that operates an actuator such as a boom by supplying and discharging pilot pressure from a pilot valve to the pilot oil chamber of the pilot switching valve via a pilot line, The oil chambers 7a and 7b are respectively connected to the pilot hydraulic pressure source 5 via the pilot valve 6, and the return line 11 of the relief valve 10 which controls the pilot pressure from the pilot hydraulic source 5 is connected to the ON-OFF switching valve 12.
Pilot pipes 8a and 8b are connected to the pilot oil chambers 7a and 7b, respectively, and connect the pilot oil chambers 7a and 7b to the pilot valve 6.
The branch pipes 13a and 13b branched from the ON-OFF switching valve 12 are connected to the ON-OFF switching valve 12 via the shuttle valve 14.
A pilot-operated hydraulic circuit characterized in that it is connected to a pilot oil chamber 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10098887U JPS646401U (en) | 1987-07-02 | 1987-07-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10098887U JPS646401U (en) | 1987-07-02 | 1987-07-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS646401U true JPS646401U (en) | 1989-01-13 |
Family
ID=31329568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10098887U Pending JPS646401U (en) | 1987-07-02 | 1987-07-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS646401U (en) |
-
1987
- 1987-07-02 JP JP10098887U patent/JPS646401U/ja active Pending