JPS6419663U - - Google Patents
Info
- Publication number
- JPS6419663U JPS6419663U JP11251087U JP11251087U JPS6419663U JP S6419663 U JPS6419663 U JP S6419663U JP 11251087 U JP11251087 U JP 11251087U JP 11251087 U JP11251087 U JP 11251087U JP S6419663 U JPS6419663 U JP S6419663U
- Authority
- JP
- Japan
- Prior art keywords
- boom
- valve
- group
- throttle part
- boom 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
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
は従来技術油圧回路図である。
１…ブーム第１弁、２…ブーム第２弁、３…ブ
ームシリンダ、４…ブーム用リモコン弁、５…第
１ポンプ、６…第２ポンプ、７…パイロツトポン
プ、９…ブーム、１２…パイロツト弁、２９…可
変絞り部、３０…絞り部調整用シリンダ。
FIG. 1 is a hydraulic circuit diagram according to this invention, and FIG. 2 is a conventional hydraulic circuit diagram. 1... Boom first valve, 2... Boom second valve, 3... Boom cylinder, 4... Boom remote control valve, 5... First pump, 6... Second pump, 7... Pilot pump, 9... Boom, 12... Pilot Valve, 29... variable throttle section, 30... throttle section adjustment cylinder.
Claims (1)
タ制御用切換弁を２個のグループＡ，Ｂに分け、
そのグループＡ内にブーム第１弁を、かつ、グル
ープＢ内にブーム第２弁を設け、また、グループ
Ａ、グループＢのそれぞれ圧油供給源として第１
ポンプ、第２ポンプを配置した油圧回路において
、ブーム第１弁またはブーム第２弁と、ブームシ
リンダとを連通する圧油供給用油路のいずれか一
方に可変絞り部を設けるとともに、その可変絞り
部とブーム上昇用パイロツト弁とを、絞り部調整
用シリンダを介して連結したことを特徴とする油
圧シヨベルの油圧回路。 The switching valves for controlling various hydraulic actuators installed on the hydraulic excavator are divided into two groups A and B.
A first boom valve is provided in group A, a second boom valve is provided in group B, and a first boom valve is provided as a pressure oil supply source for each of group A and group B.
In the hydraulic circuit in which the pump and the second pump are arranged, a variable throttle part is provided in either one of the pressure oil supply oil passages communicating between the first boom valve or the second boom valve and the boom cylinder, and the variable throttle part A hydraulic circuit for a hydraulic excavator, characterized in that a pilot valve for raising a boom is connected to a cylinder for adjusting a throttle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11251087U JPS6419663U (en) | 1987-07-21 | 1987-07-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11251087U JPS6419663U (en) | 1987-07-21 | 1987-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6419663U true JPS6419663U (en) | 1989-01-31 |
Family
ID=31351512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11251087U Pending JPS6419663U (en) | 1987-07-21 | 1987-07-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6419663U (en) |
-
1987
- 1987-07-21 JP JP11251087U patent/JPS6419663U/ja active Pending