JPH0423804U - - Google Patents
Info
- Publication number
- JPH0423804U JPH0423804U JP6504590U JP6504590U JPH0423804U JP H0423804 U JPH0423804 U JP H0423804U JP 6504590 U JP6504590 U JP 6504590U JP 6504590 U JP6504590 U JP 6504590U JP H0423804 U JPH0423804 U JP H0423804U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- circuit
- hydraulic cylinder
- holding circuit
- pressure holding
- 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 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Component Parts Of Construction Machinery (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の一実施例を示す油圧回路図、
第２図は圧力スイツチの接続例を示す電気回路図
である。
１０……第１主回路、１３……第１油圧ポンプ
、１７……電磁弁、１８……吐出側回路、２０…
…第２主回路、２３……第２油圧ポンプ、２７…
…吐出側回路、３０……圧力保持回路、３１……
複動シリンダ、３２……単動シリンダ、３３，３
４……切換弁、３５……分岐回路、３６……チエ
ツク弁、３７……減圧弁、３８……アキユムレー
タ、３９……圧力計、４０……圧力スイツチ、４
１……警報発生手段、Ｍ……エンジン。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention;
FIG. 2 is an electrical circuit diagram showing an example of the connection of the pressure switch. 10...First main circuit, 13...First hydraulic pump, 17...Solenoid valve, 18...Discharge side circuit, 20...
...Second main circuit, 23...Second hydraulic pump, 27...
...Discharge side circuit, 30...Pressure holding circuit, 31...
Double acting cylinder, 32...Single acting cylinder, 33,3
4...Switching valve, 35...Branch circuit, 36...Check valve, 37...Pressure reducing valve, 38...Accumulator, 39...Pressure gauge, 40...Pressure switch, 4
1... Alarm generating means, M... Engine.
Claims (1)
シリンダに所定圧力の油圧を供給する圧力保持回
路であつて、該圧力保持回路は、主回路の油圧ポ
ンプ吐出側回路から分岐して前記油圧シリンダの
作動回路に至る分岐回路と、該分岐回路に設けら
れたチエツク弁と、該チエツク弁の下流側に設け
られたアキユムレータと、前記油圧シリンダの作
動回路の圧力が所定圧力以下になると作動する圧
力スイツチとを備え、さらに該圧力スイツチの作
動により閉弁する電磁弁を前記主回路に設けたこ
とを特徴とする建設機械用油圧シリンダの圧力保
持回路。 ２ 請求項１記載の建設機械用油圧シリンダの圧
力保持回路において、前記電磁弁に代えて、前記
圧力スイツチの作動により警報を発生する警報発
生手段を設けたことを特徴とする建設機械用油圧
シリンダの圧力保持回路。[Scope of Claim for Utility Model Registration] 1. A pressure holding circuit that supplies hydraulic pressure at a predetermined pressure to a hydraulic cylinder for construction machinery that maintains a continuous pressurized state, and the pressure holding circuit is connected to a hydraulic pump discharge of a main circuit. A branch circuit branching from a side circuit to the operating circuit of the hydraulic cylinder, a check valve provided in the branch circuit, an accumulator provided downstream of the check valve, and pressure in the operating circuit of the hydraulic cylinder. 1. A pressure holding circuit for a hydraulic cylinder for construction machinery, comprising: a pressure switch that operates when the pressure becomes lower than a predetermined pressure; and further comprising a solenoid valve that closes when the pressure switch is operated, in the main circuit. 2. The pressure holding circuit for a hydraulic cylinder for construction machinery according to claim 1, characterized in that, in place of the electromagnetic valve, an alarm generating means for generating an alarm by actuation of the pressure switch is provided. pressure holding circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6504590U JPH0423804U (en) | 1990-06-20 | 1990-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6504590U JPH0423804U (en) | 1990-06-20 | 1990-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0423804U true JPH0423804U (en) | 1992-02-26 |
Family
ID=31596525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6504590U Pending JPH0423804U (en) | 1990-06-20 | 1990-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423804U (en) |
-
1990
- 1990-06-20 JP JP6504590U patent/JPH0423804U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0423804U (en) | ||
| JPS5810005Y2 (en) | Accumulator hydraulic circuit | |
| JPS6151629U (en) | ||
| JPS61197301U (en) | ||
| JPH0352404U (en) | ||
| JPS61133102U (en) | ||
| JPH0411267U (en) | ||
| JPH0411266U (en) | ||
| JPH0368334U (en) | ||
| JPH0419792U (en) | ||
| JPH0160002U (en) | ||
| JPS6429064U (en) | ||
| JPS6129105U (en) | High pressure control hydraulic circuit | |
| JPH0379126U (en) | ||
| JPH02145352U (en) | ||
| JPH027376U (en) | ||
| JPS6252303U (en) | ||
| JPH0342813U (en) | ||
| JPH01295006A (en) | Pressure converter using remaining pressure in double acting cylinder | |
| JPH02145304U (en) | ||
| JPH0192501U (en) | ||
| JPS6429505U (en) | ||
| JPH01104438U (en) | ||
| JPS58194954U (en) | Vacuum booster | |
| JPH0378980U (en) |