JPS58109602U - Agricultural tractor work equipment control valve - Google Patents
Agricultural tractor work equipment control valveInfo
- Publication number
- JPS58109602U JPS58109602U JP615182U JP615182U JPS58109602U JP S58109602 U JPS58109602 U JP S58109602U JP 615182 U JP615182 U JP 615182U JP 615182 U JP615182 U JP 615182U JP S58109602 U JPS58109602 U JP S58109602U
- Authority
- JP
- Japan
- Prior art keywords
- main passage
- spool
- control valve
- valve
- agricultural tractor
- 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
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
- Fluid-Pressure Circuits (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図は従来のコントロール弁の中立時の縦断正面図、
第２図は本考案のコントロール弁の中立時の縦断正面図
、第３図は上げ作動時にスプールが中立に戻る状態の縦
断正面図である。
２・・・・・・弁孔、４・・・・・−ポンプ側メイン通
路、５゜６・・・・・・シリンダ側メイン通路、８・・
・・・・スリット、９．１０・・・・・・通路、２０・
・・・・・スプール、２１ａ・・・・・・第１のロッド
、２１ｂ・・・・・・第２のロッド、３７、・・・・・
−アンロードバルブ、３９・・・・・・アンロードバル
ブ背部液室、Ｔ・・・・・・タンク。Figure 1 is a longitudinal sectional front view of a conventional control valve in neutral state.
FIG. 2 is a vertical sectional front view of the control valve of the present invention in neutral state, and FIG. 3 is a vertical sectional front view of the control valve in a state in which the spool returns to neutral state during lifting operation. 2...Valve hole, 4...-Pump side main passage, 5゜6...Cylinder side main passage, 8...
...slit, 9.10 ... passage, 20.
... Spool, 21a ... First rod, 21b ... Second rod, 37, ...
- Unload valve, 39... Unload valve back liquid chamber, T... Tank.
Claims (2)
プールを挿入した弁孔と通じ、ポンプ側メイン通路はア
ンロードバルブを介してタンク側に開閉され、アンロー
ドバルブ背部液室はスプールの摺動に応じて高圧側又は
低圧側に選択的に開閉されるようにした液圧作動装置に
於て、前記スプールの外周にスリットを形成し、又、同
じくスプールにメイン通話をアンロードバルブ背部液室
に開閉する通路を形成し、スリットの開口面一に比例し
てポンプ側メイン通路の圧油をシリンダ側メイン通路に
供給するようにし更にアンロードバルブの下流側にオリ
フィスを設け、このオリフィス前後の差圧がバイパスを
介してスプール背部に導かれるようにした農用トラクタ
の作業機コントロール弁。(1) The main passage on the pump side and the main passage on the cylinder side communicate with the valve hole into which the spool is inserted, the main passage on the pump side is opened and closed to the tank side via the unload valve, and the liquid chamber on the back of the unload valve communicates with the valve hole where the spool is inserted. In the hydraulic operating device, which is configured to selectively open and close to the high pressure side or the low pressure side depending on The pressure oil in the main passage on the pump side is supplied to the main passage on the cylinder side in proportion to the opening level of the slit. Furthermore, an orifice is provided on the downstream side of the unload valve. A work equipment control valve for an agricultural tractor in which differential pressure is guided to the back of the spool via a bypass.
され、第２のロッドが単独である量移動できるようにし
た実用新案登録請求の範囲第１項′ 記載の農用トラク
タの作業機コントロール弁。(2) A working machine for an agricultural tractor according to claim 1', in which the spool is divided into a first rod and a second rod, and the second rod can be moved independently by a certain amount. control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP615182U JPS58109602U (en) | 1982-01-20 | 1982-01-20 | Agricultural tractor work equipment control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP615182U JPS58109602U (en) | 1982-01-20 | 1982-01-20 | Agricultural tractor work equipment control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58109602U true JPS58109602U (en) | 1983-07-26 |
Family
ID=30018934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP615182U Pending JPS58109602U (en) | 1982-01-20 | 1982-01-20 | Agricultural tractor work equipment control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58109602U (en) |
-
1982
- 1982-01-20 JP JP615182U patent/JPS58109602U/en active Pending
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