JPS63198645U - - Google Patents
Info
- Publication number
- JPS63198645U JPS63198645U JP9039387U JP9039387U JPS63198645U JP S63198645 U JPS63198645 U JP S63198645U JP 9039387 U JP9039387 U JP 9039387U JP 9039387 U JP9039387 U JP 9039387U JP S63198645 U JPS63198645 U JP S63198645U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- boom
- group
- pilot
- switching
- 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
- 238000007796 conventional method Methods 0.000 description 1
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シヨベルの油圧
回路図、第２図は従来技術の油圧回路図である。
１……ブーム弁、２，２′……ブーム合流弁、
３……旋回弁、４……旋回モータ、５……ブーム
シリンダ、６……第１ポンプ、７……第２ポンプ
、９……旋回用リモコン弁、１０……ブーム用リ
モコン弁、４１……絞り部付切換弁、４３……シ
ヤトル弁。
FIG. 1 is a hydraulic circuit diagram of a hydraulic excavator according to this invention, and FIG. 2 is a hydraulic circuit diagram of a conventional technique. 1...Boom valve, 2,2'...Boom merging valve,
3... Swivel valve, 4... Swivel motor, 5... Boom cylinder, 6... First pump, 7... Second pump, 9... Remote control valve for swing, 10... Remote control valve for boom, 41... ...Switching valve with throttle part, 43...Shuttle valve.
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内に旋回弁とブーム合流弁とを並
列に設け、かつ、グループＢ内にブーム弁を設け
、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、ブーム用リモコン弁のブーム
上昇用パイロツト弁と、ブーム合流弁のパイロツ
ト圧受圧部とを連通するパイロツト油路に遅延用
絞り部付切換弁を介設するとともに、その絞り部
付切換弁のパイロツト圧受圧部と旋回パイロツト
圧導出用シヤトル弁とを連通して構成したことを
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 swing valve and a boom merging valve are provided in parallel in group A, a boom valve is provided in group B, and a first pump and a second pump are provided as pressure oil supply sources for group A and group B, respectively. In the installed hydraulic circuit, a switching valve with a delay throttle part is interposed in the pilot oil passage that communicates the boom lifting pilot valve of the boom remote control valve with the pilot pressure receiving part of the boom merging valve, and a switching valve with a delay throttle part is installed. 1. A hydraulic circuit for a hydraulic excavator, characterized in that a pilot pressure receiving part of a switching valve and a shuttle valve for deriving swing pilot pressure are configured to communicate with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9039387U JPS63198645U (en) | 1987-06-11 | 1987-06-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9039387U JPS63198645U (en) | 1987-06-11 | 1987-06-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63198645U true JPS63198645U (en) | 1988-12-21 |
Family
ID=30950211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9039387U Pending JPS63198645U (en) | 1987-06-11 | 1987-06-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63198645U (en) |
-
1987
- 1987-06-11 JP JP9039387U patent/JPS63198645U/ja active Pending