JPH0380175U

JPH0380175U -

Info

Publication number: JPH0380175U
Application number: JP14147889U
Authority: JP
Priority date: 1989-12-06
Filing date: 1989-12-06
Publication date: 1991-08-16

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示すもので、流量制
御弁装置の断面図、第２図は他の変形例としての
流量制御弁装置の断面図、第３図は従来の流量制
御弁装置の断面図である。１……弁ハウジング、３……弁スリーブ、４…
…弁スプール、６……蓋板、７，８，９……環状
溝、１０，１１，１２……スリツト、１３……第
１ピストン部、１４……第２ピストン部、１５…
…第１ランド部、１６……第２ランド部、２０…
…鍔付きナツト部、２１……第１スプリング、２
２……第２スプリング、２６……第１流体室、２
７……第２流体室、２８……第１絞り通路、２８
ａ……第１制御通路、２９……第２絞り通路、２
９ａ……第２制御通路、５１……電磁圧力制御弁
、７０……リリーフ弁、７１……リリーフ底部室
、７２……リリーフニードル弁、７３……リリー
フ弁本体、７５……第３スプリング、８０……連
通路、９１……排出側連通路、１００，１０１…
…流量制御弁装置。 Fig. 1 shows an embodiment of the present invention, and is a sectional view of a flow control valve device, Fig. 2 is a sectional view of a flow control valve device as another modification, and Fig. 3 is a conventional flow control valve device. FIG. 1...Valve housing, 3...Valve sleeve, 4...
...Valve spool, 6... Lid plate, 7, 8, 9... Annular groove, 10, 11, 12... Slit, 13... First piston part, 14... Second piston part, 15...
...First land portion, 16...Second land portion, 20...
... Flammed nut part, 21 ... First spring, 2
2...Second spring, 26...First fluid chamber, 2
7...Second fluid chamber, 28...First throttle passage, 28
a...First control passage, 29...Second throttle passage, 2
9a... Second control passage, 51... Electromagnetic pressure control valve, 70... Relief valve, 71... Relief bottom chamber, 72... Relief needle valve, 73... Relief valve body, 75... Third spring, 80...Communication path, 91...Discharge side communication path, 100, 101...
...Flow control valve device.

Claims

[Claims for Utility Model Registration] (1) A first fluid chamber and a second fluid chamber are provided on both sides of a valve spool that switches a plurality of flow paths and controls the flow rate, and the valve spool is biased toward the first fluid chamber. A second spring that urges the first spring and the valve spool toward the second fluid chamber.
A spring is provided, a first throttle passage is provided in the first supply passage connecting the pump and the tank, an electromagnetic pressure control valve is provided downstream of the first throttle passage, and a second supply passage connecting the pump and the tank is provided with a first throttle passage. A second throttle passage and a relief valve for controlling the pressure in the second fluid chamber by a third spring are provided on the downstream side of the second throttle passage, and the pressure between the first throttle passage and the electromagnetic pressure control valve is controlled by the first throttle passage. A flow rate control valve device comprising: a first control passage leading to a fluid chamber; and a second control passage guiding pressure between a second throttle passage and a relief valve to the second fluid chamber. (2) A first fluid chamber and a second fluid chamber are provided on both sides of a valve spool that switches a plurality of flow paths and controls the flow rate, a first spring is provided that biases the valve spool toward the first fluid chamber, and the pump An electromagnetic pressure control valve is provided in the supply passage, and a relief valve for controlling the pressure in the second fluid chamber by a third spring is provided downstream of this supply passage. A flow rate characterized in that a first control passage is provided to guide the pressure in front of the pressure control valve to the first fluid chamber, and a second control passage is provided to guide the pressure between the electromagnetic pressure control valve and the relief valve to the second fluid chamber. Control valve device.