JPS6415804U - - Google Patents
Info
- Publication number
- JPS6415804U JPS6415804U JP10775987U JP10775987U JPS6415804U JP S6415804 U JPS6415804 U JP S6415804U JP 10775987 U JP10775987 U JP 10775987U JP 10775987 U JP10775987 U JP 10775987U JP S6415804 U JPS6415804 U JP S6415804U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- valve
- hydraulic cylinder
- check valve
- counterbalance
- 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 1
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Control And Safety Of Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は、本考案の実施例の回路図、第２図は
、従来の技術を示す回路図。
１……油圧ポンプ、２……タンク、３……方向
切換弁、４……油圧シリンダ、５，１０……カウ
ンタバランス弁、１１……制御部、１２……逆止
弁、１３……操作部。
FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional technique. DESCRIPTION OF SYMBOLS 1...Hydraulic pump, 2...Tank, 3...Directional switching valve, 4...Hydraulic cylinder, 5, 10...Counter balance valve, 11...Control unit, 12...Check valve, 13...Operation Department.
Claims (1)
、油圧シリンダの一方の圧力室が制御部と逆止弁
を有するカウンタバランス弁を介して接続される
と共に、油圧シリンダの他方の油圧室を直接接続
した建設機械の油圧回路において、前記カウンタ
バランス弁に、その逆止弁を開放させる操作装置
を設けたことを特徴とする建設機械の油圧回路。 One pressure chamber of the hydraulic cylinder is connected via a counterbalance valve having a control unit and a check valve, and the other hydraulic chamber of the hydraulic cylinder is directly connected to the directional control valve that connects the hydraulic pump and the tank. What is claimed is: 1. A hydraulic circuit for construction machinery, characterized in that the counterbalance valve is provided with an operating device for opening the check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10775987U JPS6415804U (en) | 1987-07-14 | 1987-07-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10775987U JPS6415804U (en) | 1987-07-14 | 1987-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6415804U true JPS6415804U (en) | 1989-01-26 |
Family
ID=31342461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10775987U Pending JPS6415804U (en) | 1987-07-14 | 1987-07-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6415804U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5925754B2 (en) * | 1981-12-02 | 1984-06-20 | 工業技術院長 | Adhesive for ceramics and its adhesion method |
-
1987
- 1987-07-14 JP JP10775987U patent/JPS6415804U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5925754B2 (en) * | 1981-12-02 | 1984-06-20 | 工業技術院長 | Adhesive for ceramics and its adhesion method |