JPH0192502U - - Google Patents
Info
- Publication number
- JPH0192502U JPH0192502U JP18838287U JP18838287U JPH0192502U JP H0192502 U JPH0192502 U JP H0192502U JP 18838287 U JP18838287 U JP 18838287U JP 18838287 U JP18838287 U JP 18838287U JP H0192502 U JPH0192502 U JP H0192502U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- pump
- remote control
- hydraulic
- valve
- 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
- 239000010720 hydraulic oil Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims 4
- 238000010276 construction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図はこの考案にかかる油圧回路図、第２図
はこの考案の他実施例にかかわる複数段絞り部の
図、第３図は油圧シヨベルの全体側面図、第４図
は従来技術の油圧回路図である。
１０…第１ポンプ、１１…第２ポンプ、１２…
パイロツトポンプ、１３…リモコン弁、１４…操
作レバー、１５，１６…パイロツト弁、１７…第
１パイロツト切換弁、１８，１９，２２…パイロ
ツト圧受圧部、２１…第２パイロツト切換弁、２
４…特定油圧アクチユエータ、２５…作動油タン
ク、３４…可変絞り部、３５，３９，４０…固定
絞り部。
Fig. 1 is a hydraulic circuit diagram according to this invention, Fig. 2 is a diagram of a multi-stage throttle section relating to another embodiment of this invention, Fig. 3 is an overall side view of a hydraulic excavator, and Fig. 4 is a hydraulic circuit diagram of a conventional technology. It is a circuit diagram. 10...first pump, 11...second pump, 12...
Pilot pump, 13... Remote control valve, 14... Operation lever, 15, 16... Pilot valve, 17... First pilot switching valve, 18, 19, 22... Pilot pressure receiving part, 21... Second pilot switching valve, 2
4... Specific hydraulic actuator, 25... Hydraulic oil tank, 34... Variable throttle section, 35, 39, 40... Fixed throttle section.
Claims (1)
圧油供給源として第１ポンプおよび第２ポンプを
配置し、リモコン用操作レバーのうち特定操作レ
バーを合流側方向へ操作したときに第１パイロツ
ト切換弁と第２パイロツト切換弁をともに切換作
動させ、第１ポンプと第２ポンプからの吐出圧油
を合流せしめて特定油圧アクチユエータに供給可
能とした油圧回路において、リモコン用リモコン
弁の合流側パイロツト弁と、上記第２パイロツト
切換弁の合流側パイロツト圧受圧部とを連通する
パイロツト油路に可変絞り部を設けるとともに、
その可変絞り部と第２パイロツト切換弁の上記パ
イロツト圧受圧部とを連通する油路と、作動油タ
ンクとを固定絞り部を介して連結したことを特徴
とする建設機械の油圧回路。 A first pump and a second pump are arranged as pressure oil supply sources for various hydraulic actuators installed in construction machinery, and when a specific operation lever among the remote control operation levers is operated in the merging direction, the In a hydraulic circuit in which two pilot switching valves are both operated to switch, pressure oil discharged from the first pump and the second pump can be combined and supplied to a specific hydraulic actuator, the merging side pilot valve of the remote control valve for remote control, and the above-mentioned A variable throttle part is provided in the pilot oil passage that communicates with the confluence side pilot pressure receiving part of the second pilot switching valve, and
A hydraulic circuit for construction machinery, characterized in that an oil passage communicating the variable throttle section and the pilot pressure receiving section of the second pilot switching valve is connected to a hydraulic oil tank via a fixed throttle section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18838287U JPH0526323Y2 (en) | 1987-12-10 | 1987-12-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18838287U JPH0526323Y2 (en) | 1987-12-10 | 1987-12-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0192502U true JPH0192502U (en) | 1989-06-16 |
| JPH0526323Y2 JPH0526323Y2 (en) | 1993-07-02 |
Family
ID=31479479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18838287U Expired - Lifetime JPH0526323Y2 (en) | 1987-12-10 | 1987-12-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0526323Y2 (en) |
-
1987
- 1987-12-10 JP JP18838287U patent/JPH0526323Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0526323Y2 (en) | 1993-07-02 |