JPS60189677U

JPS60189677U - flow path switching valve

Info

Publication number: JPS60189677U
Application number: JP7654184U
Authority: JP
Inventors: 秀樹宇野
Original assignee: コ−シン・ラシン株式会社
Priority date: 1984-05-26
Filing date: 1984-05-26
Publication date: 1985-12-16

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 the drawing]

第１図は本考案の流路切換弁を示す断面図、第２図は第
１図の要部拡大断面図、第３図はスＩＪ−ブの展開図、
第４図は流路切換弁を有する液圧回路図、第５図は従来
の流路切換弁のスプールを示す斜視図、第６図はこのス
プールを組付けた状態を示子第２図同様の断面図である
。ｌａ、ｌｂ：ソレノイド、２：電磁式切換弁、３：液圧
式切換弁、４：液タンク、５：ポンプ、６：第一の流路
、７：第一のポート、８：第二の流路、９：第一のポー
ト、１０：液圧シリンダ、１１：ピストン、１２：ロッ
ド、１３ａ、１３ｂ：圧縮ばね、１４：第三のポート、
１５：第二のポート、Ｌ６：第四のポート、１７：第三
の流路、１８ａ、１８ｂニジリンダ部、１９ａ、１９ｂ
＝圧縮ばね、２０：第四の流路、２１：第三のポート、
２２：第二のポート、２３：第四のポート、２４：第五
の流路、２５：左室、２６：第六の流路、２７：第七の
流路、２８ａ、２８ｂ：絞り弁、２９：大径部、３０：
小径部、３１ニスプール、３２：Ｖ字溝、３３：右室、
３４ニジリン゛　ダ室、３５ａ、３５ｂ、３５ｃ、３５
ｄ、３５ｅ：大径部、３６：流路、３７：スリーブ、３
８ａｙ　３８ｂｔ　３８ｃｖ　３８ａｇ　　３８ｅ　：
間隙、３９ｙ３９ａ：通孔。じり冷第１図・　、３６　２　３６　　　　／を第２図第３図Fig. 1 is a sectional view showing the flow path switching valve of the present invention, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, and Fig. 3 is a developed view of the tube.
Fig. 4 is a hydraulic circuit diagram with a flow switching valve, Fig. 5 is a perspective view showing a spool of a conventional flow switching valve, and Fig. 6 shows a state in which this spool is assembled, similar to Fig. 2. FIG. la, lb: solenoid, 2: electromagnetic switching valve, 3: hydraulic switching valve, 4: liquid tank, 5: pump, 6: first flow path, 7: first port, 8: second flow path, 9: first port, 10: hydraulic cylinder, 11: piston, 12: rod, 13a, 13b: compression spring, 14: third port,
15: Second port, L6: Fourth port, 17: Third flow path, 18a, 18b cylinder part, 19a, 19b
= compression spring, 20: fourth flow path, 21: third port,
22: second port, 23: fourth port, 24: fifth flow path, 25: left ventricle, 26: sixth flow path, 27: seventh flow path, 28a, 28b: throttle valve, 29: Large diameter part, 30:
Small diameter part, 31 varnish spool, 32: V-shaped groove, 33: right ventricle,
34 rainbow cylinder room, 35a, 35b, 35c, 35
d, 35e: Large diameter portion, 36: Channel, 37: Sleeve, 3
8ay 38bt 38cv 38ag 38e:
Gap, 39y39a: Through hole. Fig. 1, 36 2 36 /, Fig. 2, Fig. 3

Claims

[Scope of utility model registration request]

The first and second ports provided on one side and the third port provided on the other side,
Communication with the fourth port is controlled by a solenoid, and the pressure fluid sent to the first port is sent to either the third or fourth port, or is not sent to either port. The other end of the flow path is connected to the third and fourth ports of the electromagnetic switching valve to be switched, and the spool is moved by hydraulic pressure to establish communication between the supply/discharge port of the hydraulic actuator and the pressure fluid supply device. In a flow path switching valve connected to a cylinder section provided opposite to both ends of a spool of a hydraulic switching valve, the ports connecting each flow path of the hydraulic switching valve are connected to the inner circumferential surface of the cylinder chamber. A cylinder-shaped sleeve is inserted into the cylinder chamber and has a plurality of through holes formed in the cylinder chamber at positions opposite to each large-diameter part. A flow path switching valve characterized in that a spool having a small diameter portion and a small diameter portion communicated with each other is fitted inside the sleeve so as to be slidable in the axial direction.