JPS60135364U - Hydraulic excavator hydraulic circuit - Google Patents
Hydraulic excavator hydraulic circuitInfo
- Publication number
- JPS60135364U JPS60135364U JP2050584U JP2050584U JPS60135364U JP S60135364 U JPS60135364 U JP S60135364U JP 2050584 U JP2050584 U JP 2050584U JP 2050584 U JP2050584 U JP 2050584U JP S60135364 U JPS60135364 U JP S60135364U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- switching
- pilot
- excavator
- switching 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
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図及び第２図は公知のパイロット操作式油圧回路。
第３図は本考案に係る油圧回路。第４図は第３図の回路
におけるエンジン停止時のアクチェータラインの圧抜時
の切換弁の状態を示す。第５図は同じくパイロットライ
ンの遮断時の切換弁の状態を示す。第６図は３位置切換
弁の別の例を示す。
図において；１・・曲パイロットポンプ、２・・曲リリ
ーフ弁、３・・曲パイロットバルブ、４・・−−−−７
キユムレータ、５・・・・・・逆止弁、６・・・・・・
切換バルブ、６′、６″・・曲３位置切換バルブ。1 and 2 show a known pilot-operated hydraulic circuit. Figure 3 shows a hydraulic circuit according to the present invention. FIG. 4 shows the state of the switching valve in the circuit of FIG. 3 when the engine is stopped and the actuator line is depressurized. FIG. 5 similarly shows the state of the switching valve when the pilot line is shut off. FIG. 6 shows another example of a three-position switching valve. In the figure; 1... curved pilot pump, 2... curved relief valve, 3... curved pilot valve, 4...---7
Cumulator, 5... Check valve, 6...
Switching valve, 6', 6''... 3 position switching valve.
Claims (1)
換弁を切換えるためのパイロット切換弁３とパイロット
ポンプ１との間に３位置切換弁を設け、かつパイロット
ラインに圧力保持用の逆止弁５を備えたアキュムレータ
４を設け、３位置切換弁を切換えることによってエンジ
ン停止後の各アクチェータラインの圧抜き及び遮断を可
能としたことを特徴とする油圧ショベルの油圧回路。An accumulator equipped with a three-position switching valve between a pilot pump 1 and a pilot switching valve 3 for switching the directional switching valves that control each actuator in a hydraulic excavator, and a check valve 5 for maintaining pressure in the pilot line. 4. A hydraulic circuit for a hydraulic excavator, characterized in that by switching a 3-position switching valve, it is possible to release pressure from and shut off each actuator line after the engine is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2050584U JPS60135364U (en) | 1984-02-17 | 1984-02-17 | Hydraulic excavator hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2050584U JPS60135364U (en) | 1984-02-17 | 1984-02-17 | Hydraulic excavator hydraulic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60135364U true JPS60135364U (en) | 1985-09-09 |
Family
ID=30511053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2050584U Pending JPS60135364U (en) | 1984-02-17 | 1984-02-17 | Hydraulic excavator hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60135364U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6272908A (en) * | 1985-09-24 | 1987-04-03 | Hitachi Ltd | Control device of actuator |
-
1984
- 1984-02-17 JP JP2050584U patent/JPS60135364U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6272908A (en) * | 1985-09-24 | 1987-04-03 | Hitachi Ltd | Control device of actuator |
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