JPS60165557U - Hydraulic circuit for construction machinery - Google Patents
Hydraulic circuit for construction machineryInfo
- Publication number
- JPS60165557U JPS60165557U JP5353284U JP5353284U JPS60165557U JP S60165557 U JPS60165557 U JP S60165557U JP 5353284 U JP5353284 U JP 5353284U JP 5353284 U JP5353284 U JP 5353284U JP S60165557 U JPS60165557 U JP S60165557U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic circuit
- construction machinery
- working machine
- side chamber
- cylinder
- 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)
- Fluid-Pressure Circuits (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来例を示す油圧回路図、第２図以下は本考案
の実施例を示すもので、第２図はブーム、７１Ｊンダと
方向切換弁とコントロールレバーとの関係を示す概略的
な構成説明図、第３図は油圧回路図である。
４はボトム側室、５はロッド側室、６は電磁比例制御方
向切換弁、７は油圧源、９は補助切換弁、９ａは遮断位
置、９ｂは連通位置、９ｃは夕゛ンクポート。Fig. 1 is a hydraulic circuit diagram showing a conventional example, Fig. 2 and the following show an embodiment of the present invention, and Fig. 2 is a schematic diagram showing the relationship between the boom, the 71J cylinder, the directional control valve, and the control lever. The configuration explanatory diagram and FIG. 3 are hydraulic circuit diagrams. 4 is a bottom side chamber, 5 is a rod side chamber, 6 is an electromagnetic proportional control directional switching valve, 7 is a hydraulic pressure source, 9 is an auxiliary switching valve, 9a is a shutoff position, 9b is a communication position, and 9c is a reverse link port.
Claims (1)
室５とを電磁比例制御方向切換弁６を介して油圧源７に
接続した建設機械の作業機用油圧回路において、上記シ
リンダの両室４，５とを、遮断位置９ａとタンクポー）
９ｃを有する連通位置９ｂとを設けた電磁比例制御形の
補助切換弁９を介して接続したことを特徴とする建設機
械の作業機用油圧回路。In a hydraulic circuit for a working machine of construction machinery, in which a bottom side chamber 4 and a rod side chamber 5 of a cylinder that moves the working machine up and down are connected to a hydraulic power source 7 via an electromagnetic proportional control directional control valve 6, both chambers 4 of the cylinder, 5 and the cutoff position 9a and tank port)
A hydraulic circuit for a working machine of a construction machine, characterized in that the hydraulic circuit is connected via an electromagnetic proportional control type auxiliary switching valve 9 provided with a communication position 9b having a communication position 9c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5353284U JPS60165557U (en) | 1984-04-13 | 1984-04-13 | Hydraulic circuit for construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5353284U JPS60165557U (en) | 1984-04-13 | 1984-04-13 | Hydraulic circuit for construction machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60165557U true JPS60165557U (en) | 1985-11-02 |
Family
ID=30574486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5353284U Pending JPS60165557U (en) | 1984-04-13 | 1984-04-13 | Hydraulic circuit for construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60165557U (en) |
-
1984
- 1984-04-13 JP JP5353284U patent/JPS60165557U/en active Pending
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