JPS6181069U

JPS6181069U -

Info

Publication number: JPS6181069U
Application number: JP16354385U
Authority: JP
Priority date: 1985-10-23
Filing date: 1985-10-23
Publication date: 1986-05-29
Also published as: JPS6344615Y2

Description

[Brief explanation of drawings]

第１図は従来の切換弁を示す説明図、第２図は
本考案の一実施例に係る切換弁の一部切欠正面図
、第３，４図は夫々第２図の切換弁の中立位置及
び切換位置を示す説明図、第５図は従来の切換弁
と第２図の切換弁の軸推力の変動を夫々示す説明
図、第６図は第５図の開口直前を示す説明図、第
７，８図は夫々本考案の他の実施例を示す切換弁
の中立位置及び切換位置を示す説明図、第９，１
０図は夫々本考案のさらに他の実施例を示す切換
弁の中立位置及び切換位置を示す説明図である。１…弁本体、２，２２…スプール、３，４…ラ
ンド、５，６…電磁ソレノイド、８…弁室、９，
１０，１１，１２，１３…環状室、１４…通路、
１６，１７，２３，２４…補助ランド、１８，１
９，２７，２５…第１、第２、第３、第４開口部
。 Fig. 1 is an explanatory diagram showing a conventional switching valve, Fig. 2 is a partially cutaway front view of a switching valve according to an embodiment of the present invention, and Figs. 3 and 4 are respective neutral positions of the switching valve shown in Fig. 2. FIG. 5 is an explanatory diagram showing the fluctuation of the axial thrust of the conventional switching valve and the switching valve of FIG. 2, respectively. FIG. 6 is an explanatory diagram showing just before the opening of FIG. Figures 7 and 8 are explanatory diagrams showing the neutral position and switching position of the switching valve showing other embodiments of the present invention, respectively, and Figures 9 and 1 are
FIG. 0 is an explanatory view showing a neutral position and a switching position of a switching valve showing still another embodiment of the present invention, respectively. 1... Valve body, 2, 22... Spool, 3, 4... Land, 5, 6... Electromagnetic solenoid, 8... Valve chamber, 9,
10, 11, 12, 13... annular chamber, 14... passage,
16, 17, 23, 24... Auxiliary land, 18, 1
9, 27, 25...first, second, third, fourth openings.

Claims

[Claims for Utility Model Registration] Five annular chambers 9, 10, 11, 12, 13, first to fifth, are arranged around the valve chamber 8 formed in the valve body 1.
At the same time, the first and fifth annular chambers 9 and 13 at both ends are communicated through one passage 14, and the middle thereof is connected to the tank port T, and the third annular chamber 1 in the middle is connected to the tank port T.
1 is connected to the pressure port P, and the other second and fourth annular chambers 10 and 12 are connected to the two load ports A and B, respectively. Electromagnetic coils 5 and 6 into which the spool 2 consisting of the groove 15 formed between the grooves 3 and 4 is inserted and reciprocally moved, and which moves the spool 2 from the first annular chamber 9 side to the fifth annular chamber 13 side. and a switching valve equipped with springs 21 and 20 for moving the sprue 2 from the fifth annular chamber 13 side to the first annular chamber 9 side, An auxiliary land 16 having a smaller diameter than the first land 3 is integrally formed on the first annular chamber 9 side, and the first land 3 is switched from the second annular chamber 10 side to the third annular chamber 11 side. When the end face of the auxiliary land 16 is located within the second annular chamber 10, the corner of the first land 3 and the second
A first opening 18 is formed by a corner of the annular chamber 10, and a second opening 19 is formed by a corner of the auxiliary land 16 and a corner of the second annular chamber 10. Also the first opening 18
A switching valve characterized by having a large area.