JPS631901U - - Google Patents
Info
- Publication number
- JPS631901U JPS631901U JP9503986U JP9503986U JPS631901U JP S631901 U JPS631901 U JP S631901U JP 9503986 U JP9503986 U JP 9503986U JP 9503986 U JP9503986 U JP 9503986U JP S631901 U JPS631901 U JP S631901U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- control valve
- flow path
- swing hydraulic
- swing
- 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 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例を示す油圧回路図、第
２図はリモコン弁のレバー操作角と油圧モータの
加速圧力および減速圧力との関係を示す制御線図
である。
１…油圧ポンプ、４…方向制御弁、５…旋回用
油圧モータ、７…タンク、８…リモコン弁、８ａ
，８ｂ…可変減圧弁、１０ａ，１０ｂ…パイロツ
ト流路、１１…シヤトル弁、１２…パイロツト流
路、１３…定差減圧弁、１４…パイロツト流路、
１５…圧力制御弁、１６…シヤトル弁。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention, and FIG. 2 is a control diagram showing the relationship between the lever operation angle of the remote control valve and the acceleration pressure and deceleration pressure of the hydraulic motor. 1... Hydraulic pump, 4... Direction control valve, 5... Hydraulic motor for swing, 7... Tank, 8... Remote control valve, 8a
, 8b... variable pressure reducing valve, 10a, 10b... pilot flow path, 11... shuttle valve, 12... pilot flow path, 13... constant difference pressure reducing valve, 14... pilot flow path,
15...Pressure control valve, 16...Shuttle valve.
Claims (1)
制御される旋回用リモコン弁と、リモコン弁から
のパイロツト圧によつて切替えられる方向制御弁
と、方向制御弁によつて油圧ポンプからの供給流
量が制御される旋回用油圧モータとを備えた建設
機械の旋回油圧回路において、旋回用油圧モータ
の両側流路のうちの高圧側流路の圧力が設定値を
越えた時に高圧側流路の圧油の一部を低圧側流路
にバイパスさせて高圧側流路の圧力を上記パイロ
ツト圧に応じた圧力に制御する圧力制御弁を、旋
回用油圧モータの両側流路間に設けたことを特徴
とする建設機械の旋回油圧回路。 A swing remote control valve whose pilot pressure to the secondary side is controlled by lever operation, a directional control valve which is switched by the pilot pressure from the remote control valve, and a directional control valve that controls the supply flow rate from the hydraulic pump. In a swing hydraulic circuit of a construction machine equipped with a swing hydraulic motor that is controlled, when the pressure in the high-pressure side flow path of the flow paths on both sides of the swing hydraulic motor exceeds a set value, the pressure in the high-pressure side flow path is A pressure control valve is provided between the flow paths on both sides of the swing hydraulic motor to bypass a portion of the oil to the low pressure side flow path and control the pressure in the high pressure side flow path to a pressure corresponding to the pilot pressure. A swing hydraulic circuit for construction machinery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9503986U JPS631901U (en) | 1986-06-20 | 1986-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9503986U JPS631901U (en) | 1986-06-20 | 1986-06-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS631901U true JPS631901U (en) | 1988-01-08 |
Family
ID=30959109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9503986U Pending JPS631901U (en) | 1986-06-20 | 1986-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS631901U (en) |
-
1986
- 1986-06-20 JP JP9503986U patent/JPS631901U/ja active Pending