JPS63162104U

JPS63162104U -

Info

Publication number: JPS63162104U
Application number: JP5463787U
Authority: JP
Priority date: 1987-04-10
Filing date: 1987-04-10
Publication date: 1988-10-24
Anticipated expiration: 2002-04-10
Also published as: JPH0640323Y2

Description

[Brief explanation of the drawing]

図面第１〜３図はこの考案の実施例を示す断面
図、第４，５図は従来の流量制御弁の断面図であ
る。１…弁本体、２…ポンプポート、３…制御流ポ
ート、４…余剰流ポート、２２…スプール、２４
…制御オリフイス、２６…ピストン、２８…制御
棒、２８ａ…先細り部。 Figures 1 to 3 are sectional views showing an embodiment of this invention, and Figures 4 and 5 are sectional views of a conventional flow control valve. 1... Valve body, 2... Pump port, 3... Control flow port, 4... Surplus flow port, 22... Spool, 24
...Control orifice, 26...Piston, 28...Control rod, 28a...Tapered portion.

補正昭６２．６．１１考案の名称を次のように補正する。考案の名称流量制御弁実用新案登録請求の範囲、図面の簡単な説明を
次のように補正する。Amendment June 11, 1982 The name of the invention is amended as follows. Title of the invention Flow rate control valve The scope of the utility model registration claim and the brief description of the drawings are amended as follows.

【実用新案登録請求の範囲】弁本体にポンプポートと、制御流ポートと、余
剰流ポートとを形成するとともに、この弁本体に
スプールを内装し、上記ポンプポートと制御流ポ
ートとをスプールに形成した制御オリフイスを介
して連通させ、かつ、上記制御オリフイスの上流
側の圧力に応じて、当該スプールの移動量を制御
するとともに、このスプールの移動量に応じて、
ポンプポートと余剰流ポートとのラツプ量を制御
する構成にした流量制御弁において、上記スプー
ルにピストンを対向させるとともに、このピスト
ンに制御棒を突出させ、この制御棒には径を異に
した多段部を形成し、この多段部を上記制御オリ
フイスに出入自在にしてなり、しかも、上記ピス
トンには制御流ポート側の圧力を作用させる構成
にした流量制御弁。[Claims for Utility Model Registration] A pump port, a control flow port, and a surplus flow port are formed in the valve body, and a spool is installed inside the valve body, and the pump port and the control flow port are formed in the spool. The amount of movement of the spool is controlled in accordance with the pressure on the upstream side of the control orifice, and the amount of movement of the spool is controlled in accordance with the amount of movement of the spool.
In a flow control valve configured to control the amount of overlap between a pump port and a surplus flow port, a piston is opposed to the spool, a control rod is protruded from the piston, and the control rod has a multi-stage structure with different diameters. The flow control valve has a structure in which the multistage part is configured to be able to move in and out of the control orifice, and the pressure on the control flow port side is applied to the piston.

【図面の簡単な説明】図面第１〜３図はこの考案の実施例を示す断面
図、第４，５図は従来の流量制御弁を示す断面図
である。１…弁本体、２…ポンプポート、３…制御流ポ
ート、４…余剰流ポート、６…スプール、１９…
制御オリフイス、２２…ピストン、２３…制御棒
、２３ａ…大径部、２３ｂ…小径部。BRIEF DESCRIPTION OF THE DRAWINGS Figures 1 to 3 are sectional views showing an embodiment of this invention, and Figures 4 and 5 are sectional views showing a conventional flow control valve. 1... Valve body, 2... Pump port, 3... Control flow port, 4... Surplus flow port, 6... Spool, 19...
Control orifice, 22... Piston, 23... Control rod, 23a... Large diameter part, 23b... Small diameter part.

Claims

[Scope of utility model registration request]

A pump port, a control flow port, and a surplus flow port are formed in the valve body, and a spool is installed inside the valve body, and the pump port and the control flow port are communicated with each other via a control orifice formed in the spool. , and controlling the amount of movement of the spool in accordance with the pressure on the upstream side of the control orifice, and depending on the amount of movement of the spool,
In a flow control valve configured to control the amount of overlap between a pump port and a surplus flow port, a piston is installed in the spool, and a tapered part is formed at the tip of a control rod provided on the piston. , the piston can be freely moved in and out of the control orifice, a spring is applied to one end of the piston, and the pressure on the control flow port side is guided to the other end, so that the piston is at a position where the pressure on the control flow port side and the spring force of the spring are balanced. A flow control valve configured to control the substantial opening area of a control orifice.