JPH0341286U

JPH0341286U -

Info

Publication number: JPH0341286U
Application number: JP10244989U
Authority: JP
Priority date: 1989-08-31
Filing date: 1989-08-31
Publication date: 1991-04-19
Anticipated expiration: 2004-08-31
Also published as: JPH083799Y2

Description

[Brief explanation of drawings]

第１図は流体圧式のサスペンシヨンに組込まれ
たパイロツト式の圧力制御弁として構成された本
考案によるスプール弁の一つの実施例を示す断面
図、第２図は第１図に示されたスプール弁のスプ
ールの要部を示す拡大部分平面図、第３図及び第
４図はそれぞれ第２図の線−、線−に沿
う断面図、第５図は従来のスプール弁を示す第１
図と同様の断面図である。１０……スプール弁、１２……ハウジング、１
４……スプール受入れ孔、１６……流体供給ポー
ト、１８……流体排出ポート、２０……流体給排
ポート、２２……スプール、２４……第一のラン
ド、２６……第二のランド、２８……環状溝、３
０……弁室、３２……第一のパイロツト室、３４
……第二のパイロツト室、３６……内部通路、３
８……ソレノイド弁、４０……ハウジング、４２
……オリフイス、４４……弁室、４６……弁要素
、４８……ソレノイド、５０……ポンプ、５２…
…作動流体供給通路、５４……作動流体排出通路
、５６……リブーブタンク、５８……接続通路、
６０……アクチユエータ、６２……作動流体室、
６４……固定絞り、６６，６８……接続通路、７
０……スリツト。 FIG. 1 is a sectional view showing one embodiment of a spool valve according to the present invention configured as a pilot-type pressure control valve incorporated in a hydraulic suspension, and FIG. 2 is a sectional view of the spool valve shown in FIG. 1. FIGS. 3 and 4 are sectional views taken along lines - and - in FIG. 2, respectively, and FIG. 5 is an enlarged partial plan view showing the main parts of the spool of the valve.
It is a sectional view similar to the figure. 10...Spool valve, 12...Housing, 1
4... Spool receiving hole, 16... Fluid supply port, 18... Fluid discharge port, 20... Fluid supply/discharge port, 22... Spool, 24... First land, 26... Second land, 28... annular groove, 3
0... Valve chamber, 32... First pilot chamber, 34
...Second pilot compartment, 36...Internal passage, 3
8...Solenoid valve, 40...Housing, 42
... Orifice, 44 ... Valve chamber, 46 ... Valve element, 48 ... Solenoid, 50 ... Pump, 52 ...
...working fluid supply passage, 54... working fluid discharge passage, 56... reboob tank, 58... connection passage,
60... actuator, 62... working fluid chamber,
64... Fixed throttle, 66, 68... Connection passage, 7
0...Slit.

Claims

[Scope of utility model registration request]

A housing having a spool receiving hole extending along the axis, a fluid supply port and a fluid discharge port each opening into the spool receiving hole, and a fluid supply and discharge port provided between these ports; The valve chamber is arranged in the spool receiving hole so as to be reciprocally movable along the spool receiving hole, and has first and second lands. a spool defined in between, a micro passage provided in the second land and always communicating with the valve chamber, and positioning means for positioning the spool, and when the spool is in the neutral position, the second land The first land closes the fluid supply port without substantially overlapping a portion of the wall surface of the spool receiving hole between the fluid supply port and the fluid supply/discharge port, and the second land covers the spool receiving hole. The fluid discharge port is closed with a predetermined amount of overlap between the fluid discharge port and the fluid supply and discharge port on the wall surface of the hole, and the valve chamber and the fluid discharge port are communicated and connected by the micro passage. A spool valve configured to