JPS5914772U

JPS5914772U - Flow control device for power steering device

Info

Publication number: JPS5914772U
Application number: JP11123882U
Authority: JP
Inventors: 田ノ岡　茂男; 岩本　浩一
Original assignee: 豊田工機株式会社
Priority date: 1982-07-22
Filing date: 1982-07-22
Publication date: 1984-01-28

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 drawings]

第１図は従来の流量制御装置の一部を断面して示す部分
断面図、第２図は流量制御装置におけるポンプ回転数に
対する流量特性を示すグラフ、第３図は本考案の流量制
御装置の実施例を示す断面図、第４図は第３図のＩＶ−
ＩＶ栓断面矢視親図第５図は同流量制御装置の要部を示
す部分拡大断面図、第６図は制御スプールの斜視図、第
７図は本考案の他の実施例を示す同流量制御装置の部分
拡大断面図である。１０・・・ポンプハウジング、１１・・・収納孔、１２
・・・供給通路、１３・・・バイパス通路、２０・・・
流量制御装置、２１・・・ユニオン、２２・・・スプー
ル弁、２３・・・制御スプール、２３Ｃ・・・突起部、
２３ｄ・・・オリフィス形成部材、２４ａ・・・第１オ
“リフイス、２４ｂ・・・第２オリフイス、２４ｄ・・
・環状端面、３１・・・絞り通路、３２．３３・・・弁
室。Fig. 1 is a partial sectional view showing a part of a conventional flow control device, Fig. 2 is a graph showing the flow rate characteristics with respect to the pump rotation speed in the flow control device, and Fig. 3 is a graph showing the flow rate characteristics of the flow control device of the present invention. A cross-sectional view showing the embodiment, FIG.
FIG. 5 is a partially enlarged cross-sectional view showing the main parts of the same flow rate control device, FIG. 6 is a perspective view of the control spool, and FIG. 7 is a similar flow rate diagram showing another embodiment of the present invention. FIG. 3 is a partially enlarged sectional view of the control device. 10... Pump housing, 11... Storage hole, 12
... Supply passage, 13... Bypass passage, 20...
Flow rate control device, 21... Union, 22... Spool valve, 23... Control spool, 23C... Projection,
23d... Orifice forming member, 24a... First orifice, 24b... Second orifice, 24d...
- Annular end surface, 31... Throttle passage, 32.33... Valve chamber.

Claims

[Scope of utility model registration request]

A power steering system in which the pressurized fluid discharged from the pump is sent from the supply passage through the orifice to the power steering device, and the surplus flow is returned to the suction side of the pump by a flow rate adjustment spool valve that adjusts the opening degree of the bypass passage. In the flow rate control device for a device, a throttle passage provided in the supply passage and a quantity control spool that is displaced in response to a pressure difference before and after the throttle passage that occurs in response to an increase in the discharge flow rate due to an increase in pump rotation speed. The control spool has a projection inserted into the orifice at its shaft end, and the cross-sectional area of the passage opening formed by the projection and the orifice is gradually reduced as the control spool moves. A flow control device for a power steering device, characterized in that: