JPS61112069U - - Google Patents
Info
- Publication number
- JPS61112069U JPS61112069U JP20018284U JP20018284U JPS61112069U JP S61112069 U JPS61112069 U JP S61112069U JP 20018284 U JP20018284 U JP 20018284U JP 20018284 U JP20018284 U JP 20018284U JP S61112069 U JPS61112069 U JP S61112069U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- valve
- swing
- controls
- power 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
- 238000010276 construction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第1図は本考案油圧回路の第1実施例を示す油
圧回路図、第2図は同第2実施例を示す油圧回路
図、第3図は従来の油圧シヨベルの油圧回路図で
ある。
2……パイロツトポンプ、3……ブームシリン
ダ、4……ブーム用方向切換弁、5……旋回モー
タ、6……旋回用方向切換弁、9……ブーム用パ
イロツト弁、10……旋回用パイロツト、11…
…補助油圧源、13,17……ブロツク弁、13
a,17b……パイロツト部。
FIG. 1 is a hydraulic circuit diagram showing a first embodiment of the hydraulic circuit of the present invention, FIG. 2 is a hydraulic circuit diagram showing a second embodiment of the same, and FIG. 3 is a hydraulic circuit diagram of a conventional hydraulic excavator. 2... Pilot pump, 3... Boom cylinder, 4... Boom directional control valve, 5... Swing motor, 6... Swing directional control valve, 9... Boom pilot valve, 10... Swing pilot , 11...
...Auxiliary hydraulic power source, 13, 17...Block valve, 13
a, 17b... Pilot section.
Claims (1)
ズドセンタ型の旋回用方向切換弁と、この切換弁
のパイロツト圧を制御する旋回用パイロツト弁と
、他のアクチユエータの方向切換弁のパイロツト
圧を制御するパイロツト弁と、前記旋回用パイロ
ツト弁と他のパイロツト弁に補助油圧源を介して
並列に接続するパイロツトポンプとを備えて成る
建設機械の油圧回路において、前記旋回用パイロ
ツト弁の入力側管路あるいは出力管路に、旋回用
パイロツト弁の機能を停止するブロツク弁を設け
、このブロツク弁のパイロツト部を、パイロツト
ポンプと補助油圧源との間に接続した建設機械の
油圧回路。 A closed center type swing directional switching valve that directly controls the drive and stop of the swing motor, a swing pilot valve that controls the pilot pressure of this switching valve, and a pilot that controls the pilot pressure of the directional switching valves of other actuators. In a hydraulic circuit of a construction machine comprising a valve and a pilot pump connected in parallel to the swing pilot valve and another pilot valve via an auxiliary hydraulic power source, the input side pipe or the output of the swing pilot valve is A hydraulic circuit for construction machinery in which a block valve for stopping the function of a swing pilot valve is provided in a conduit, and the pilot part of this block valve is connected between a pilot pump and an auxiliary hydraulic power source.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20018284U JPS61112069U (en) | 1984-12-25 | 1984-12-25 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20018284U JPS61112069U (en) | 1984-12-25 | 1984-12-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61112069U true JPS61112069U (en) | 1986-07-15 |
Family
ID=30760791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20018284U Pending JPS61112069U (en) | 1984-12-25 | 1984-12-25 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61112069U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994018399A1 (en) * | 1993-02-09 | 1994-08-18 | Hitachi Construction Machinery Co., Ltd. | Hydraulic driving device for a construction machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5941532A (en) * | 1982-09-02 | 1984-03-07 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for slewing operation |
-
1984
- 1984-12-25 JP JP20018284U patent/JPS61112069U/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5941532A (en) * | 1982-09-02 | 1984-03-07 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for slewing operation |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994018399A1 (en) * | 1993-02-09 | 1994-08-18 | Hitachi Construction Machinery Co., Ltd. | Hydraulic driving device for a construction machine |
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