JPS58144102U

JPS58144102U - Agricultural tractor work equipment control valve

Info

Publication number: JPS58144102U
Application number: JP4237682U
Authority: JP
Inventors: 中里　英一
Original assignee: カヤバ工業株式会社
Priority date: 1982-03-25
Filing date: 1982-03-25
Publication date: 1983-09-28

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

[Brief explanation of drawings]

第１図は従来のコントロールバルブの縦断正面図、第２
図は本考案の一実施態様に係るコントロールバルブの縦
断側面図、第３図、第４図は他の実施態様に係るコント
ロールバルブの縦断正面図及び縦断側面図、第５図、第
６図は同じ（他の実施態様に係るコントロールバルブの
縦断正面図及び縦断側面図である。１　、　１　ａ、　　１　ｂ−、、メ−（ン／：／ｌ／
ブ本体、２．　２ａ。２ｂ・・・サブバルブ本体、３．　３ａ、　　３ｂ、　
　３３・・・チェックバルブ、２０・・・スプール、３
７・・・アンロードバルブ、４３・・・第１のチェック
バルブ、Ａ・・・シリンダ、ｈ・・・リリーフバルブ。Figure 1 is a longitudinal sectional front view of a conventional control valve, Figure 2
The figure is a longitudinal sectional side view of a control valve according to one embodiment of the present invention, FIGS. 3 and 4 are longitudinal sectional front views and longitudinal sectional side views of a control valve according to other embodiments, and FIGS. 5 and 6 are 1, 1a, 1b-, main/:/l/
main body, 2. 2a. 2b...sub-valve body, 3. 3a, 3b,
33...Check valve, 20...Spool, 3
7... Unload valve, 43... First check valve, A... Cylinder, h... Relief valve.

Claims

[Scope of utility model registration request]

(1) In the control valve that opens and closes the unload valve by switching the spool and operates the cylinder to expand and contract,
A work equipment control valve for an agricultural tractor, characterized in that a sub-valve body incorporating a valve member that affects flow rate is detachably attached to a main valve body including at least a spool, an unload valve, and a first check valve.

(2) A work equipment control valve for an agricultural tractor as set forth in claim 1 of the utility model registration claim, in which the sub-valve body incorporates a check valve in parallel with the check valve on the main valve body side.

(3) The working machine control valve for an agricultural tractor according to claim 1, which has a second check valve built into the sub-valve body in series with the main passage.

(4) The agricultural tractor working machine control valve according to claim 1, which incorporates a check valve and a relief valve into the sub-valve body.