JPH0318703U

JPH0318703U -

Info

Publication number: JPH0318703U
Application number: JP8017389U
Authority: JP
Priority date: 1989-07-07
Filing date: 1989-07-07
Publication date: 1991-02-25

Description

[Brief explanation of drawings]

第１図はトラクターの油圧制御機構部分の後面
断面図、第２図は油圧制御バルブＶの側面断面図
、第３図はドラフト操作レバーと切換スプール３
の連動部分を示す斜視図、第４図は同じく断面図
、第５図はメインスプール７の斜視図、第６図は
切換スプール３の斜視図、第７図は第２図のＡ−
Ａ断面斜視図、第８図は第２図のＢ−Ｂ断面斜視
図、第９図は油圧回路図である。Ｖ……油圧制御バルブ、１……操作ピン、２…
…接当ピン、３……切換スプール、３ａ……ドラ
フト用切欠部、３ｂ……ポジシヨン用切欠部、５
……切換カム、６……連動リンク、７……メイン
スプール、７ａ……ドラフト用油孔、７ｂ……ポ
ジシヨン用油孔。 Figure 1 is a rear sectional view of the hydraulic control mechanism of the tractor, Figure 2 is a side sectional view of the hydraulic control valve V, and Figure 3 is the draft operating lever and switching spool 3.
4 is a sectional view, FIG. 5 is a perspective view of the main spool 7, FIG. 6 is a perspective view of the switching spool 3, and FIG.
FIG. 8 is a perspective view taken along the line B--B in FIG. 2, and FIG. 9 is a hydraulic circuit diagram. V...Hydraulic control valve, 1...Operation pin, 2...
...Abutment pin, 3...Switching spool, 3a...Draft notch, 3b...Position notch, 5
...Switching cam, 6...Interlocking link, 7...Main spool, 7a...Draft oil hole, 7b...Position oil hole.

Claims

[Scope of utility model registration request]

A hydraulic control valve for a tractor equipped with a position control and draft control mechanism is characterized in that a switching spool 3 is disposed inside the main spool 7 of the hydraulic control valve to limit the flow rate of pressure oil during draft control. A tractor working equipment lifting mechanism.