JPS61160303U - - Google Patents
Info
- Publication number
- JPS61160303U JPS61160303U JP4402685U JP4402685U JPS61160303U JP S61160303 U JPS61160303 U JP S61160303U JP 4402685 U JP4402685 U JP 4402685U JP 4402685 U JP4402685 U JP 4402685U JP S61160303 U JPS61160303 U JP S61160303U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pilot
- pilot pressure
- oil passages
- 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
- 238000010276 construction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Control And Safety Of Cranes (AREA)
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Description
図面は本考案の実施例を示す回路図である。
１は油圧モータ、２は切換操作弁、３，４は油
路、５，６はブレーキ用リリーフ弁、８はパイロ
ツト遮断弁、９，１０は分岐路、１１は方向制御
弁、１４，１５は逆止弁、２３は作動切換弁、２
６はシヤトル弁、ｆは付勢力、ｐ１，ｐ２はパイ
ロツト圧を示す。
The drawing is a circuit diagram showing an embodiment of the present invention. 1 is a hydraulic motor, 2 is a switching operation valve, 3 and 4 are oil passages, 5 and 6 are brake relief valves, 8 is a pilot shutoff valve, 9 and 10 are branch passages, 11 is a directional control valve, 14 and 15 are Check valve, 23 is operation switching valve, 2
6 is a shuttle valve, f is a biasing force, and p 1 and p 2 are pilot pressures.
Claims (1)
接続し、上記両油路間に油圧モータ側より一対の
ブレーキ用リリーフ弁および所要の付勢力で弁位
置が保持されるパイロツト遮断弁を設け、該パイ
ロツト遮断弁より下流側で両油路を分岐させた分
岐路を方向制御弁を介して上記両油路に合流させ
、上記両油路の分岐点と合流点の間に逆止弁を設
け、上記パイロツト遮断弁に作動切換弁とシヤト
ル弁を接続し、上記切換操作弁の切換位置に応じ
て上記方向制御弁を介し両分岐路のいずれか一方
を択一的に連通させ、油圧モータへの圧油供給時
にパイロツト圧を上記シヤトル弁を介して上記パ
イロツト遮断弁に加え、上記作動切換弁を介して
上記パイロツト遮断弁に上記パイロツト圧に対抗
するパイロツト圧を作用させるようにし、いずれ
か一方のパイロツト圧と付勢力との合力を他方の
パイロツト圧より大きくし、他方のパイロツト圧
は付勢力よりも大きくしたことを特徴とする建設
機械の旋回油圧回路。 A hydraulic motor and a switching operation valve are connected by a pair of oil passages, and a pair of brake relief valves and a pilot cutoff valve whose valve position is held by a required urging force are provided between the oil passages from the hydraulic motor side, A branch path in which both oil passages are branched downstream from the pilot shutoff valve is made to join the two oil passages via a directional control valve, and a check valve is provided between the branching point and the merging point of the two oil passages. , an operation switching valve and a shuttle valve are connected to the pilot cutoff valve, and either one of the two branching paths is selectively communicated via the directional control valve depending on the switching position of the switching operation valve, and the branching path is connected to the hydraulic motor. When pressurized oil is supplied, pilot pressure is applied to the pilot cutoff valve via the shuttle valve, and pilot pressure opposing the pilot pressure is applied to the pilot cutoff valve via the operation switching valve, either of the A swing hydraulic circuit for a construction machine, characterized in that the resultant force of one pilot pressure and a biasing force is greater than the other pilot pressure, and the other pilot pressure is greater than the biasing force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4402685U JPS61160303U (en) | 1985-03-27 | 1985-03-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4402685U JPS61160303U (en) | 1985-03-27 | 1985-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61160303U true JPS61160303U (en) | 1986-10-04 |
Family
ID=30556231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4402685U Pending JPS61160303U (en) | 1985-03-27 | 1985-03-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61160303U (en) |
-
1985
- 1985-03-27 JP JP4402685U patent/JPS61160303U/ja active Pending
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