JPS5976659U - Hydraulic excavator hydraulic circuit - Google Patents
Hydraulic excavator hydraulic circuitInfo
- Publication number
- JPS5976659U JPS5976659U JP17411082U JP17411082U JPS5976659U JP S5976659 U JPS5976659 U JP S5976659U JP 17411082 U JP17411082 U JP 17411082U JP 17411082 U JP17411082 U JP 17411082U JP S5976659 U JPS5976659 U JP S5976659U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- pilot
- boom
- boom control
- chamber
- 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
Landscapes
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
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図は油圧ショベルの一例を示す斜視図、第２図はこ
の考案の一実施例を示す系統図である。
１・・・・・・フロントアタッチメント、１ａ・・・・
・・ブーム、２・・・・・・ブームシリンダ、２ａ・・
・・・・ヘット室、２ｂ・・・・・・・・・ロッドがわ
室、３・・・・・・角筒、４・・・・・・ブームコント
ロールレバー、５…・・・パイロット式フ
、−ムコントロールレ＜ルブ、６・冊ニレジン、５ｂ
・・・・・・ブーム下げ信号受圧室、７・・曲パイロッ
ト油圧ポンプ、８・・・・・・バイパス配管、９・・・
・・・減圧弁、１０・・・・・・手動切替弁、１１・・
・・・・リリーフバルブ１．１２Ａ、１２Ｂ・・・・・
・逆止め弁、１３・・・・・・主油圧ポンプ、１４・・
・・・・油タンク、１５Ａ、１５Ｂ・・・・・・主配管
、１６・・・・・・導油管。FIG. 1 is a perspective view showing an example of a hydraulic excavator, and FIG. 2 is a system diagram showing an embodiment of this invention. 1...Front attachment, 1a...
...Boom, 2...Boom cylinder, 2a...
...Heat chamber, 2b...Rod side chamber, 3...Square tube, 4...Boom control lever, 5...Pilot type centre
,-Mucontroller, 6 volumes, Niresin, 5b
・・・・・・Boom lowering signal pressure receiving chamber, 7・・Curved pilot hydraulic pump, 8・・・・Bypass piping, 9・・・・
...Pressure reducing valve, 10...Manual switching valve, 11...
...Relief valve 1.12A, 12B...
・Check valve, 13... Main hydraulic pump, 14...
...Oil tank, 15A, 15B...Main piping, 16...Oil guide pipe.
Claims (1)
コントロールバルブの作動ポートを、主配管を介してブ
ームシリンダのヘッド室とロッドがわ室とに連結し、パ
イロット式ブームコントロールバルブのパイロット受圧
室に、パイロット油圧ポンプの吐出油をブームコントロ
ールレバーを介して給送することによりブームコントロ
ールバルブを切替えるようにした油圧ショベルの油圧回
路にお（１）で、ブームシリンダのヘッド室ヲバイパス
配管を介してパイロット油圧ポンプの吐出がわに接続し
、ブームコントロールレバーとブームシリンダのヘッド
室との間のバイパス配管部分に、減圧弁とブロック位置
および流通位置に切替えられる切替弁とを、減圧弁を切
替弁の上流がわに位置させて取付けたことを特徴とする
油圧回路。The operating port of the pilot type boom control valve connected to the discharge side of the main hydraulic pump is connected to the head chamber and rod side chamber of the boom cylinder via the main piping, and connected to the pilot pressure receiving chamber of the pilot type boom control valve. In (1), the hydraulic circuit of the hydraulic excavator is designed to switch the boom control valve by supplying the discharge oil of the pilot hydraulic pump via the boom control lever, and the pilot oil is supplied to the head chamber of the boom cylinder via bypass piping. A pressure reducing valve and a switching valve that can be switched to the block position and the flow position are connected to the discharge side of the hydraulic pump and are connected to the bypass piping section between the boom control lever and the head chamber of the boom cylinder. A hydraulic circuit characterized by being installed at an upstream side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17411082U JPS5976659U (en) | 1982-11-16 | 1982-11-16 | Hydraulic excavator hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17411082U JPS5976659U (en) | 1982-11-16 | 1982-11-16 | Hydraulic excavator hydraulic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5976659U true JPS5976659U (en) | 1984-05-24 |
Family
ID=30379123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17411082U Pending JPS5976659U (en) | 1982-11-16 | 1982-11-16 | Hydraulic excavator hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5976659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001132020A (en) * | 1999-11-08 | 2001-05-15 | Hitachi Constr Mach Co Ltd | Trouble diagnostic device of hydraulic cylinder |
-
1982
- 1982-11-16 JP JP17411082U patent/JPS5976659U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001132020A (en) * | 1999-11-08 | 2001-05-15 | Hitachi Constr Mach Co Ltd | Trouble diagnostic device of hydraulic cylinder |
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