JPS5894757U - Hydraulic excavator hydraulic circuit - Google Patents
Hydraulic excavator hydraulic circuitInfo
- Publication number
- JPS5894757U JPS5894757U JP19123681U JP19123681U JPS5894757U JP S5894757 U JPS5894757 U JP S5894757U JP 19123681 U JP19123681 U JP 19123681U JP 19123681 U JP19123681 U JP 19123681U JP S5894757 U JPS5894757 U JP S5894757U
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- hydraulic
- boom
- arm
- switching
- 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.)
- Granted
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (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
図は本考案の一実施例を示す油圧回路の系統図である。
１・・・複合制御弁、２・・・弁体、３・・・センタバ
イパス通路、ｇａ、 ｇｂ、 ３ｃ・・・供給通路
、１１・・・アームシリンダ、１２・・・ブームシリン
ダ、１４・・・旋回用切換弁、１５・・・アーム用切換
弁、１６・・・ブーム用切換弁、１７．２０・・・絞り
。The figure is a system diagram of a hydraulic circuit showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Composite control valve, 2... Valve body, 3... Center bypass passage, ga, gb, 3c... Supply passage, 11... Arm cylinder, 12... Boom cylinder, 14... ... Swivel switching valve, 15... Arm switching valve, 16... Boom switching valve, 17.20... Throttle.
Claims (1)
ル供給通路を有する複数個の切換弁Ａと同切換弁Ａに隣
設し、一方のみに供給通路を有する複数個の切換弁Ｂと
からなる複合制御弁を有し、前記切換弁Ａは１つを旋回
モータを制御する旋回用切換弁とし、前記切換弁Ｂはア
ームシリンダを制御するアーム用切換弁とブームシリン
ダを制御するブーム用切換弁とし、そのアーム用切換弁
はその内部に設けた絞りを介して通油される側を前記ア
ームシリンダのヘッド側にこれとは反対側をロンド側に
接続し、前記ブーム用切換弁はその内部に設けた絞りを
介して通油される側を前記ブームシリンダのロンド側に
これとは反対側をヘッド側に接続したことを特徴とする
油圧ショベルの油圧回路。Consists of a plurality of switching valves A that have two parallel supply passages on the left and right sides of a center bypass passage provided in the valve body, and a plurality of switching valves B that are adjacent to the switching valve A and have a supply passage on only one side. It has a composite control valve, one of the switching valves A is a swing switching valve that controls a swing motor, and the switching valve B is an arm switching valve that controls an arm cylinder and a boom switching valve that controls a boom cylinder. The switching valve for the arm is connected to the head side of the arm cylinder on the side through which oil is passed through a throttle provided inside, and the opposite side is connected to the rond side, and the switching valve for the boom is connected to the inside thereof. A hydraulic circuit for a hydraulic excavator, characterized in that a side through which oil is passed through a throttle provided in the boom cylinder is connected to a rond side of the boom cylinder, and an opposite side thereof is connected to a head side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19123681U JPS5894757U (en) | 1981-12-22 | 1981-12-22 | Hydraulic excavator hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19123681U JPS5894757U (en) | 1981-12-22 | 1981-12-22 | Hydraulic excavator hydraulic circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5894757U true JPS5894757U (en) | 1983-06-27 |
| JPS6145248Y2 JPS6145248Y2 (en) | 1986-12-19 |
Family
ID=30104709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19123681U Granted JPS5894757U (en) | 1981-12-22 | 1981-12-22 | Hydraulic excavator hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5894757U (en) |
-
1981
- 1981-12-22 JP JP19123681U patent/JPS5894757U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6145248Y2 (en) | 1986-12-19 |
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