JPH0250446U - - Google Patents
Info
- Publication number
- JPH0250446U JPH0250446U JP12869288U JP12869288U JPH0250446U JP H0250446 U JPH0250446 U JP H0250446U JP 12869288 U JP12869288 U JP 12869288U JP 12869288 U JP12869288 U JP 12869288U JP H0250446 U JPH0250446 U JP H0250446U
- Authority
- JP
- Japan
- Prior art keywords
- blade
- hydraulic
- valve
- pilot valve
- pilot
- 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
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図は本考案実施例にもとづく油圧式掘削機
のブレードリフト、チルト油圧回路、第２図は従
来技術にもとづく油圧式掘削機の外観図、第３図
は従来技術にもとづく油圧式掘削機のブレードリ
フト、チルト油圧回路図である。
１……３連操作弁、１ａ……ブレード操作弁、
５……切換スイツチ、７ａ……切換弁、７ｂ……
切換弁、８ａ……チエツク弁、８ｂ……チエツク
弁、８ｃ……ソレノイド、８ｄ……チエツク弁、
８ｅ……チエツク弁、８ｆ……ソレノイド、９…
…リフトシリンダー、１０……パイロツト弁、１
０ａ……ソレノイド、１１……チルトシリンダー
。
Fig. 1 is a blade lift and tilt hydraulic circuit of a hydraulic excavator based on an embodiment of the present invention, Fig. 2 is an external view of a hydraulic excavator based on the prior art, and Fig. 3 is a hydraulic excavator based on the prior art. This is a blade lift and tilt hydraulic circuit diagram. 1...Triple operation valve, 1a...Blade operation valve,
5...Switching switch, 7a...Switching valve, 7b...
Switching valve, 8a...Check valve, 8b...Check valve, 8c...Solenoid, 8d...Check valve,
8e...Check valve, 8f...Solenoid, 9...
...Lift cylinder, 10...Pilot valve, 1
0a...Solenoid, 11...Tilt cylinder.
Claims (1)
リフトシリンダーを有する油圧式掘削機において
、前記ブレードのリフト油圧回路に切換スイツチ
でパイロツト油圧を作動・停止するパイロツト弁
とこのパイロツト弁で作動油の流れを切換える一
対の切換弁を設け、各切換弁をリフトシリンダー
及びチルトシリンダーに管路で接続したことを特
徴とする油圧式掘削機のブレードチルト油圧回路
。 In a hydraulic excavator that has a lift cylinder that moves the blade up and down by operating a blade operation valve, a pilot valve that operates and stops pilot hydraulic pressure with a switch in the lift hydraulic circuit of the blade, and a pilot valve that switches the flow of hydraulic oil with this pilot valve. A blade tilt hydraulic circuit for a hydraulic excavator, characterized in that a pair of switching valves are provided, and each switching valve is connected to a lift cylinder and a tilt cylinder via a conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12869288U JPH0250446U (en) | 1988-09-30 | 1988-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12869288U JPH0250446U (en) | 1988-09-30 | 1988-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0250446U true JPH0250446U (en) | 1990-04-09 |
Family
ID=31382270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12869288U Pending JPH0250446U (en) | 1988-09-30 | 1988-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0250446U (en) |
-
1988
- 1988-09-30 JP JP12869288U patent/JPH0250446U/ja active Pending