JPS5865177U

JPS5865177U - power steering system

Info

Publication number: JPS5865177U
Application number: JP16130281U
Authority: JP
Inventors: 足立　義治; 洋内藤; 昭夫橋本
Original assignee: Aisin Seiki Co Ltd
Current assignee: Aisin Corp
Priority date: 1981-10-29
Filing date: 1981-10-29
Publication date: 1983-05-02

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図は動力かじ取り装置の断面図、第２図は該装置に
組込まれるコントロールバルブ装置の断面図、第３図は
操舵反力と路面反力の関係を示すグラフ図である。図中：１・・・動力かじ取り装置、３・・・ウオームシ
ャフト、４・・・パワーピストン、５・・・セクタシャ
フト、７・・・ステアリングナツト、８・・・バルブピ
ン、９・・・コントロールバルブ装置、１０．　１１・
・・シリンダ室、１３・・・バルブピストン、１４・・
・オイルポンプ、１６，１゜７・・・溝、１８・・・オ
イルリザーバ、２０、　２１．　２２．　２３・・・溝
、２６．２７・・・油圧反力室、３１・・・分岐回路、
３３・・・可変オリフィス。FIG. 1 is a sectional view of a power steering device, FIG. 2 is a sectional view of a control valve device incorporated in the device, and FIG. 3 is a graph showing the relationship between steering reaction force and road surface reaction force. In the diagram: 1... Power steering device, 3... Worm shaft, 4... Power piston, 5... Sector shaft, 7... Steering nut, 8... Valve pin, 9... Control Valve device, 10. 11・
...Cylinder chamber, 13...Valve piston, 14...
・Oil pump, 16, 1゜7...Groove, 18...Oil reservoir, 20, 21. 22. 23...Groove, 26.27...Hydraulic reaction force chamber, 31...Branch circuit,
33...Variable orifice.

Claims

[Scope of utility model registration request]

A worm shaft that interlocks with a steering wheel of a vehicle, a power piston that engages with the worm shaft via a steering nut and slides along the worm shaft, and a sector shaft that engages with a rack of the power piston. a control valve device incorporated in the power piston and actuated by a valve pin fixed to the steering nut;
The control valve device has a valve piston that controls an oil passage that supplies hydraulic oil to a cylinder chamber provided on both sides of the power piston and an oil passage that communicates the cylinder chamber with an oil reservoir, and Hydraulic reaction chambers provided on both sides of the piston are electrically connected to each other by a circuit having a pair of fixed orifices, and a branch circuit having a fixed orifice connected to an oil path from an oil pump is connected between the pair of fixed orifices, A power steering device characterized in that the branch circuit is connected to the oil reservoir through a variable orifice that opens and closes depending on vehicle speed.