JPS62204071U

JPS62204071U -

Info

Publication number: JPS62204071U
Application number: JP9214386U
Authority: JP
Priority date: 1986-06-17
Filing date: 1986-06-17
Publication date: 1987-12-26

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示すもので、第１図
は農用トラクタの側面図、第２図はその農用トラ
クタの油圧装置におけるユニツト化された油圧ポ
ンプ及び制御弁装置の平面図、第３図及び第４図
は第２図の―線及び―線断面図、第５図
は第２図の矢視図、第６図は第４図の―線
断面図、第７図は第３図の―線断面図、第８
図は第７図の―線断面図、第９図は制御弁装
置の縦断面図、第９Ａ図は第９図の一部の拡大図
、第１０図及び第１１図は第９図の―線及び
―線断面図、第１２図は油圧系の油圧回
路図である。５８……チエツク弁、１０５……弁筒、１０６
……主弁、１０６ａ……ピストン、１０７……副
弁、１０７ａ……ピストン、１０９……主弁座、
１１０，１１１……弁筒の通孔、１１２……副弁
座、１１３……弁筒の通孔、１１５……開弁棒。 The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of an agricultural tractor, Fig. 2 is a plan view of a unitized hydraulic pump and control valve device in the hydraulic system of the agricultural tractor, and Fig. 3 is a plan view of a unitized hydraulic pump and control valve device in the hydraulic system of the agricultural tractor. Figures 4 and 4 are sectional views taken along lines - and - of Fig. 2, Fig. 5 is a view taken along the arrows in Fig. 2, Fig. 6 is a sectional view taken along - lines of Fig. 4, and Fig. 7 is a sectional view taken along lines - 3 of Fig. 2. - line sectional view, No. 8
The figure is a sectional view taken along the line - in Fig. 7, Fig. 9 is a vertical sectional view of the control valve device, Fig. 9A is an enlarged view of a part of Fig. 9, and Figs. 10 and 11 are - in Fig. 9. 12 is a hydraulic circuit diagram of the hydraulic system. 58...Check valve, 105...Valve cylinder, 106
...Main valve, 106a...Piston, 107...Sub-valve, 107a...Piston, 109...Main valve seat,
110, 111... Valve barrel through hole, 112... Sub-valve seat, 113... Valve barrel through hole, 115... Valve opening rod.

Claims

[Scope of utility model registration request]

A valve cylinder with a main valve seat formed at one end through which hydraulic oil flows, and a valve cylinder that cooperates with the main valve seat to allow hydraulic oil to flow in the forward direction and prevent it from flowing in the reverse direction. a cup-shaped main valve, a sub-valve seat formed at one end of the main valve to allow hydraulic oil to flow, and a sub-valve seat that cooperates with the sub-valve seat to allow hydraulic oil to flow in the forward direction and reverse flow. A sub-valve with a smaller pressure-receiving area than the main valve is housed inside the main valve to prevent the flow of water, and a sub-valve is installed opposite the main valve and the sub-valve to forcibly open them in the order of the sub-valve and the main valve. The main valve has a piston that slides on the inner circumferential surface of the valve cylinder, and a through hole that communicates between the inside and outside of the valve cylinder in front and behind the piston. The sub-valve is provided with a piston that slides over the entire circumference of the inner peripheral surface of the main valve, and a through hole that communicates the inside and outside of the main valve between the piston and the sub-valve seat. A check valve that can be forcibly opened, characterized by having a hole in the valve.