JPS59186503U - Return oil separation circuit - Google Patents
Return oil separation circuitInfo
- Publication number
- JPS59186503U JPS59186503U JP8258783U JP8258783U JPS59186503U JP S59186503 U JPS59186503 U JP S59186503U JP 8258783 U JP8258783 U JP 8258783U JP 8258783 U JP8258783 U JP 8258783U JP S59186503 U JPS59186503 U JP S59186503U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- control valve
- pressure
- directional control
- pilot
- 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
Landscapes
- Fluid-Pressure Circuits (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は作業機作動用油圧回路の１例を、第２図はその
別例を示す油圧回路図である。第３図はこの考案の油圧
回路図である。第４図はスプール前進時の調整バルブの
縦断面図、第５図はその後退時の縦断面略図である。
１・・・・・・リフトシリンダ、２・・・・・・方向制
御弁、３・・…・ポジションコントロールバルブ、５・
・・…パワー回路、６・・・・・・メイン回路、７・・
・・・・タンク回路、９・・・・・・調整バルブ、１０
・・・・・・パワーパイロット回路、１１・・・・・・
メインパイロット回路、１２・・・・・・本体、１３・
・・・・・パワーパイロットポート、１４・・・・・・
メイン回路ポート、１５・・・・・・タンクポート、１
７・・・・・・スプール、１８・・・・・・バネ。
第３図
第４図FIG. 1 is a hydraulic circuit diagram showing one example of a hydraulic circuit for operating a working machine, and FIG. 2 is a hydraulic circuit diagram showing another example thereof. FIG. 3 is a hydraulic circuit diagram of this invention. FIG. 4 is a vertical cross-sectional view of the regulating valve when the spool is moving forward, and FIG. 5 is a schematic vertical cross-sectional view when the spool is retracting. 1... Lift cylinder, 2... Directional control valve, 3... Position control valve, 5...
...Power circuit, 6...Main circuit, 7...
... Tank circuit, 9 ... Adjustment valve, 10
...Power pilot circuit, 11...
Main pilot circuit, 12...Main body, 13.
...Power pilot port, 14...
Main circuit port, 15...Tank port, 1
7...Spool, 18...Spring. Figure 3 Figure 4
Claims (1)
を中立にシフトして、油圧ポンプからの圧油を方向制御
弁を経て農用トラクタの３点すン□り制御用のポジショ
ンコントロールバルブに流ス回路を有する前記３点・リ
ンク作動用回路に於て、方向制御弁からポジションコン
トロールバルブへのメイン回路途中から、油圧タンクへ
分岐するタンク回路を設けて、 油圧ポンプから方向制御弁に到る回路途中よりパイロッ
ト圧Ｐ１を、 パイロット圧Ｐ工に抗するバネ力と同方向に、メイン回
路途中より、パイロット圧Ｐ２を、それぞれとることに
よって、 パイロット圧Ｐ１とパイロット圧Ｐ２との差が任意の圧
力になれば、メイン回路とタンク回路とに圧油を流すこ
とを特徴とする戻り油分離回路。[Scope of Claim for Utility Model Registration] Shifting the directional control valve of a double-acting hydraulic cylinder for an agricultural tractor working machine to neutral, and directing the pressure oil from the hydraulic pump through the directional control valve to three points on the agricultural tractor. In the three-point link operation circuit that has a flow circuit in the position control valve for control, a tank circuit is provided that branches to the hydraulic tank from the main circuit from the directional control valve to the position control valve, and the hydraulic By taking the pilot pressure P1 from the middle of the circuit from the pump to the directional control valve and the pilot pressure P2 from the middle of the main circuit in the same direction as the spring force resisting the pilot pressure P, the pilot pressure P1 and the pilot A return oil separation circuit characterized in that pressure oil flows into a main circuit and a tank circuit when the difference from pressure P2 reaches an arbitrary pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8258783U JPS59186503U (en) | 1983-05-30 | 1983-05-30 | Return oil separation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8258783U JPS59186503U (en) | 1983-05-30 | 1983-05-30 | Return oil separation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59186503U true JPS59186503U (en) | 1984-12-11 |
| JPH0131764Y2 JPH0131764Y2 (en) | 1989-09-29 |
Family
ID=30212541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8258783U Granted JPS59186503U (en) | 1983-05-30 | 1983-05-30 | Return oil separation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59186503U (en) |
-
1983
- 1983-05-30 JP JP8258783U patent/JPS59186503U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0131764Y2 (en) | 1989-09-29 |
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