JPH024071U

JPH024071U -

Info

Publication number: JPH024071U
Application number: JP8271988U
Authority: JP
Priority date: 1988-06-21
Filing date: 1988-06-21
Publication date: 1990-01-11
Anticipated expiration: 2003-06-21
Also published as: JPH0527749Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例である３位置切換弁
を示す断面図である。１……本体、２……排出ポート（流体ポート）
、３……出力ポート（流体ポート）、４……入力
ポート、５……出力ポート（流体ポート）、６…
…排出ポート（流体ポート）、７……流体圧源、
８……軸孔、８ａ，８ｂ……空間、８ｃ，８ｄ，
８ｅ，８ｆ……流体室、９，１２……弁座（第１
弁座）、１０，１１……弁座（第２弁座）、１３
……主軸、１４……流体室、１５……ピストン、
１６，１７……流体室、１８，１９……パイロツ
トポート、２０，２１……エキゾーストポペツト
部（第１ポペツト部）、２０ａ，２１ａ……凹部
、２０ｂ，２１ｂ……流路、２０ｃ，２１ｃ……
受圧面、２２，２３……ばね、２４，２５……息
抜きポート、２６，２７……ストツパ部材、２８
，２９……連通路、３０，３１……ＩＮポペツト
部（第２ポペツト部）、３０ａ，３１ａ……受圧
面、Ｓ_１，Ｓ_２，Ｓ_３，Ｓ_４，Ｓ_５……面積。 FIG. 1 is a sectional view showing a three-position switching valve which is an embodiment of the present invention. 1...Body, 2...Discharge port (fluid port)
, 3... Output port (fluid port), 4... Input port, 5... Output port (fluid port), 6...
...Discharge port (fluid port), 7...Fluid pressure source,
8...Shaft hole, 8a, 8b...Space, 8c, 8d,
8e, 8f...fluid chamber, 9, 12...valve seat (first
Valve seat), 10, 11... Valve seat (second valve seat), 13
...Main shaft, 14...Fluid chamber, 15...Piston,
16, 17... Fluid chamber, 18, 19... Pilot port, 20, 21... Exhaust poppet part (first poppet part), 20a, 21a... Recessed part, 20b, 21b... Channel, 20c, 21c ……
Pressure receiving surface, 22, 23... Spring, 24, 25... Breathing port, 26, 27... Stopper member, 28
, 29...Communication path, 30, 31...IN poppet portion (second poppet portion), 30a, 31a...pressure receiving surface, _S1 , _S2 , _S3 , _S4 , _S5 ...area.

Claims

[Claims for Utility Model Registration] 1. A main shaft, a pair of first poppet portions disposed on both ends of the main shaft so as to be freely displaceable along the axial direction of the main shaft, and a pair of second poppet parts disposed so as to be freely displaceable along the axial direction; a shaft hole through which the main shaft is displaced along the axial direction; A pair of first valve seats for the first poppet portion and a pair of second valve seats for the second poppet portion, which are provided circumferentially with an interval of , communicate with the shaft hole between the pair of the second valve seats. and a plurality of fluid ports respectively communicating with the shaft holes on both end sides between the second valve seats, and when each of the poppet portions is displaced toward the respective valve seats, A sealing pressure-receiving surface is formed on each of the poppet parts for receiving a controlled fluid pressure in the shaft hole to displace each of the poppet parts toward the respective valve seats and press against the respective valve seats, and a pair of pressure-receiving surfaces are formed on each of the poppet parts. When the second poppet portions are simultaneously pressed against the respective second valve seats, the controlled fluid in the shaft hole on both end sides between the second valve seats is applied to the pressure receiving surface of each of the poppet portions. A three-position switching valve characterized in that each poppet portion is brought into pressure contact with a respective valve seat by actuation. 2. Both ends of the shaft hole are partitioned into a pair of fluid chambers by the pair of first poppet parts, and the pair of fluid chambers are communicated with each other via a communication path in the main body. The three-position switching valve according to claim 1.