JPS6374U

JPS6374U -

Info

Publication number: JPS6374U
Application number: JP9320286U
Authority: JP
Priority date: 1986-06-20
Filing date: 1986-06-20
Publication date: 1988-01-05
Anticipated expiration: 2001-06-20
Also published as: JPH05473Y2

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係る操舵トルク
フイードバツク制御動力舵取装置の縦断面図、第
２図は第１図の装置のカムフオロアの斜視図、第
３図は第１図の装置の全体機器系統図、第４図は
第１図のコンピユータのブロツク図、第５図は本
考案の第２実施例に係る操舵トルクフイードバツ
ク制御動力舵取装置の部分縦断面図、である。１……ステアリングホイール、２……油圧ポン
プ、３……油圧通路、４……比例ソレノイドバル
ブ、１１……バルブハウジング、１２……入力軸
、１４……出力軸、１６，７１……プラグ、２１
……バルブロータ、２２……バルブスリーブ、２
４……カムフオロア、３０……付勢機構、３１，
７６……第１のピストン、３２，７２……第２の
ピストン、３３，７３……皿バネ、４１……パワ
ーシリンダ、５１……油圧センサ、５２……コン
ピユータ、５３……車速センサ、５４……操舵角
センサ、７５……大気連通孔、Ｒ４……油室。 FIG. 1 is a longitudinal cross-sectional view of a steering torque feedback control power steering device according to a first embodiment of the present invention, FIG. 2 is a perspective view of a cam follower of the device shown in FIG. 1, and FIG. 3 is a view similar to that shown in FIG. 1. FIG. 4 is a block diagram of the computer shown in FIG. 1, FIG. 5 is a partial vertical sectional view of a steering torque feedback control power steering device according to a second embodiment of the present invention, It is. DESCRIPTION OF SYMBOLS 1... Steering wheel, 2... Hydraulic pump, 3... Hydraulic passage, 4... Proportional solenoid valve, 11... Valve housing, 12... Input shaft, 14... Output shaft, 16, 71... Plug, 21
... Valve rotor, 22 ... Valve sleeve, 2
4...cam follower, 30...biasing mechanism, 31,
76... First piston, 32, 72... Second piston, 33, 73... Belleville spring, 41... Power cylinder, 51... Oil pressure sensor, 52... Computer, 53... Vehicle speed sensor, 54 ...Steering angle sensor, 75...Atmospheric communication hole, R4...Oil chamber.

Claims

[Scope of utility model registration request]

An input shaft into which the steering torque from the steering wheel is input and an output shaft which transmits the steering angle of the input shaft to the wheels are connected so as to be relatively rotatable, and a hydraulic switching valve mechanism is provided between the two shafts. a spring member that operates the hydraulic switching valve mechanism by relative rotation between the two, controls the supply and discharge of hydraulic oil to each oil chamber of the power cylinder that assists steering force, and biases the output shaft toward the input shaft; In the power steering device in which hydraulic pressure is applied in the same direction, the biasing mechanism that biases the output shaft toward the input shaft includes a first piston that directly biases the output shaft, and a first piston that biases the output shaft directly; an oil chamber that urges the oil chamber with hydraulic pressure; a second piston provided on the opposite side of the oil chamber to the first piston; and a spring member that urges the second piston toward the oil chamber. When a hydraulic pressure above a certain level is applied to the oil chamber of the second piston and the second piston is displaced above a certain level due to displacement of the spring member, further displacement of the second piston is prevented. A stopper mechanism for regulating the hydraulic pressure is provided, a hydraulic pressure sensor for detecting the hydraulic pressure in the oil chamber is provided in a hydraulic circuit for introducing hydraulic pressure into the oil chamber, and a signal from the hydraulic pressure sensor is fed back to a hydraulic pressure control means for controlling the hydraulic pressure. A steering torque feedback control power steering device characterized by: