JPS5956165U

JPS5956165U - Flow control device for power steering device

Info

Publication number: JPS5956165U
Application number: JP15252182U
Authority: JP
Inventors: 数藤　聰; 岩本　浩一
Original assignee: 豊田工機株式会社
Priority date: 1982-10-07
Filing date: 1982-10-07
Publication date: 1984-04-12
Also published as: JPH0213276Y2

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を示す一部断面図、第２図
は第１図の■−■線矢視断面図、第３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４図は本考案に係る流量制御装置の実施例を示す断面
図、第５図は第４図のＶ−Ｖ線矢視断面図である。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、２゜・・・・・・流量制御装置、２１・・・・・
・ユニオン、２２・・・・・・流量調整用スプール弁、
２３・・・・・・制御スプール、２３ａ・・・・・・流
通孔、２４ａ・・曲オリフィスセンタ穴、２４ｂ・・・
・・・オリフィスサイド穴、３１・曲・絞り通路、３２
・・・・・・第１弁室、３３・・・・・・第２弁室。Fig. 1 is a partial sectional view showing a conventional flow rate control device, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a graph showing the flow rate characteristics with respect to the pump rotation speed in the flow rate control device. ,
FIG. 4 is a sectional view showing an embodiment of the flow rate control device according to the present invention, and FIG. 5 is a sectional view taken along the line V-V in FIG. 4. 10...Pump housing, 11゛...
・Storage hole. 12... Supply passage, 13... Bypass passage, 2°... Flow rate control device, 21...
・Union, 22... Spool valve for flow rate adjustment,
23... Control spool, 23a... Distribution hole, 24a... Curved orifice center hole, 24b...
... Orifice side hole, 31, curved, throttle passage, 32
...First valve chamber, 33...Second valve chamber.

Claims

[Scope of utility model registration request]

The working fluid discharged from the fluid 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 fluid pump by a flow rate adjustment spool valve that adjusts the opening degree of the bypass passage. A flow rate control device for a power steering device includes: a control spool that is displaced in accordance with an increase or decrease in the discharge flow rate due to a change in the pump rotation speed; and an abutment member disposed opposite to the control spool on its central axis. The control spool is provided with a circulation hole on a circumference centered on the central axis through which the working fluid supplied from the fluid pump via the flow rate adjustment spool valve flows out toward the abutment member. The abutting member has an orifice center hole and a plurality of orifice side holes constituting the orifice, the former of which is located on the central axis, and the latter of which is centered on the central axis. 1. A flow rate control device for a power steering device, characterized in that the flow rate control devices are formed at positions having a phase difference of 9.0 degrees on the circumference.