JPH0170681U

JPH0170681U -

Info

Publication number: JPH0170681U
Application number: JP1987166692U
Authority: JP
Priority date: 1987-10-30
Filing date: 1987-10-30
Publication date: 1989-05-11
Anticipated expiration: 2002-10-30
Also published as: JPH0747260Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す断面図、第２
図は第１図の―線に沿う断面図、第３ｂ図は
反力機構２を構成する入力軸５の端部を示す正面
図、第３ａ図は第３ｂ図の左側面図、第４ａ図は
反力機構２を構成する出力軸９の端部を示す正面
図、第４ｂ図は第４ａ図の右側面図、第５図は第
１図の要部を簡素化して示す概略構成図、第６図
は従来装置と本発明装置との各特性を示す特性曲
線図である。１……サーボ弁、２……反力機構、３……圧力
制御機構、４……ハウジング、４ａ……孔、６，
７……弁部材、１４……ポンプ、１５……パワー
シリンダ、２７……油圧反力室、３１……スプー
ル弁、３２……ソレノイド、３８……分配通路、
３８ａ……入口側絞り部（第１絞り部）、３８ｂ
……出口側絞り部、３９……供給通路、４０……
摺動面、４１……反力通路、４２……排出通路、
４９……第２絞り部。 Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view taken along the line - in Figure 1, Figure 3b is a front view showing the end of the input shaft 5 that constitutes the reaction force mechanism 2, Figure 3a is a left side view of Figure 3b, and Figure 4a is 4b is a right side view of FIG. 4a, and FIG. 5 is a simplified schematic diagram showing the main parts of FIG. 1. FIG. 6 is a characteristic curve diagram showing each characteristic of the conventional device and the device of the present invention. DESCRIPTION OF SYMBOLS 1... Servo valve, 2... Reaction force mechanism, 3... Pressure control mechanism, 4... Housing, 4a... Hole, 6,
7... Valve member, 14... Pump, 15... Power cylinder, 27... Hydraulic reaction force chamber, 31... Spool valve, 32... Solenoid, 38... Distribution passage,
38a...Inlet side throttle part (first throttle part), 38b
... Outlet side throttle section, 39 ... Supply passage, 40 ...
Sliding surface, 41...reaction passage, 42...discharge passage,
49...Second aperture section.

Claims

[Claim for Utility Model Registration] A servo valve that distributes and controls the hydraulic pressure from the pump discharge port to the power cylinder by the relative rotation of a pair of valve members, and a servo valve that generates a steering reaction force according to the hydraulic pressure supplied to the hydraulic reaction chamber. The spool valve, which is slidably fitted into a hole formed in the housing, is moved forward and backward by controlling the energization state of the solenoid according to the speed of the vehicle, and the reaction force mechanism controls the energization state of the solenoid according to the speed of the vehicle. In a steering force control device for a power steering device, the pressure control mechanism is provided with a pressure control mechanism for controlling hydraulic pressure to a hydraulic reaction force chamber, wherein the pressure control mechanism is opened in one sliding surface of the housing and the spool valve, respectively. a supply passage communicating with the pump discharge port, a reaction passage communicating with the hydraulic reaction chamber, a distribution passage formed on the other sliding surface and communicating the supply passage and the reaction passage; A first constriction part that constricts the flow passage area between the reaction force passage and the distribution passage as the spool valve is displaced in response to a decrease in speed; a spring that biases and holds the spool valve in the operating position; and a second restrictor that reduces the flow area between the supply passage and the distribution passage to a required flow area when the spool valve is in the non-operation position. A steering force control device for a power steering device, comprising: