JPS6395973U

JPS6395973U -

Info

Publication number: JPS6395973U
Application number: JP19225486U
Authority: JP
Priority date: 1986-12-12
Filing date: 1986-12-12
Publication date: 1988-06-21
Anticipated expiration: 2001-12-12
Also published as: JPH0619420Y2

Description

[Brief explanation of drawings]

第１図〜第６図は本考案による動力舵取装置の
操舵力制御装置の一実施例を示し、第１図は全体
構成図、第２図は使用する動力舵取装置本体の縦
断面図、第３図は第２図の―断面図、第４図
は反力制御弁の特性図、第５図は油圧反力機構に
印加される反力油圧の特性図、第６図はマニアル
トルクに対するギヤ発生圧力の説明図、第７図は
従来技術の一例の全体構成図である。符号の説明、１１…出力軸、１２……入力軸、
２０……サーボ弁、３０…油圧反力機構、４０…
供給ポンプ、４１…供給通路、４２…バイパス制
御弁、４３…回転速度検知オリフイス、４６…反
力通路、５０…反力制御弁、６０…パワーシリン
ダ。 1 to 6 show an embodiment of the steering force control device for a power steering device according to the present invention, FIG. 1 is an overall configuration diagram, and FIG. 2 is a vertical sectional view of the main body of the power steering device used. , Fig. 3 is a sectional view of Fig. 2, Fig. 4 is a characteristic diagram of the reaction force control valve, Fig. 5 is a characteristic diagram of the reaction force hydraulic pressure applied to the hydraulic reaction force mechanism, and Fig. 6 is a diagram of the manual torque. FIG. 7 is an overall configuration diagram of an example of the prior art. Explanation of symbols, 11...Output axis, 12...Input axis,
20...Servo valve, 30...Hydraulic reaction force mechanism, 40...
Supply pump, 41... Supply passage, 42... Bypass control valve, 43... Rotational speed detection orifice, 46... Reaction force passage, 50... Reaction force control valve, 60... Power cylinder.

Claims

[Scope of utility model registration request]

A servo that is interposed between a power cylinder that generates an assist force and a supply pump driven by an automobile engine and that is operated based on the relative rotation of an input shaft and an output shaft to control supply and discharge of hydraulic oil to the power cylinder. A valve is provided in a supply passage between the supply pump and the servo valve, and bypasses a part of the amount of hydraulic oil from the supply pump to control the amount of oil supplied to the servo valve regardless of fluctuations in the rotational speed of the engine. a bypass control valve that keeps the assist force substantially constant; and a hydraulic reaction force mechanism that changes the assist force by controlling the torsion spring characteristics between the two shafts to become stiff as the applied hydraulic pressure increases. In the steering force control device for a power steering device, a rotation speed detection orifice provided in the supply passage upstream from the bypass control valve, and a rotation speed detection orifice branched from the supply passage upstream of the rotation speed detection orifice. A force passage and a reaction force control valve provided in this reaction force passage to control the passage area of the reaction force passage, and this reaction force control valve responds to an increase in the pressure difference generated before and after the rotational speed detection orifice. The hydraulic reaction mechanism is connected to the supply passage so that the opening degree increases to increase the passage area of the reaction passage, and the hydraulic reaction mechanism is connected to the supply passage so that the applied hydraulic pressure increases in response to an increase in the amount of hydraulic oil in the reaction passage. A steering force control device for a power steering device, characterized in that the steering force control device is connected to the reaction force passage so as to increase the reaction force.