JPS5951677U

JPS5951677U - power steering device

Info

Publication number: JPS5951677U
Application number: JP14716482U
Authority: JP
Inventors: 元小塚
Original assignee: 三菱自動車工業株式会社
Priority date: 1982-09-30
Filing date: 1982-09-30
Publication date: 1984-04-05
Also published as: JPH023983Y2

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図は本案に係るパワーステアリング装置の一実施例
を示す縦断側面図、第２図はその油圧回路図、第３図は
油路開閉弁の一実施例を示す縦断側面図、第４図は圧力
制御弁の一実施例を示す縦断側面図、第５図はオイルポ
ンプの吐出流量特性を示す説明図、第６図はオリフィス
の上流圧を示す説明図、第７図は圧力制御弁のチャンバ
ー（出入口側圧力室）の圧力を示す説明図、第８図は圧
カー人カトルク特性を示す説明図である。１ａ・・・・・・エンジン、１ｂ・・・・・・オイルポ
ンプ、２・・・・・・油路切換弁、３・・・・・・パワ
ーシリンダ、４・・・・・・タンク、５．　５’・・・
・・・反力ビストン、７・・・・・・オリフィス、８・
・・・・・高圧油路、８′・・・・・・分岐油路、９゜
９′、９″・・・・・・低圧油路、１０・・・・・・油
路開閉弁、１１・・・・・・圧力制御弁、１４・・・・
・・制御用スプリング、　　　′　１１８ａ、　　１８
ｂ、　　１８Ｃ，１８ｄ−−−−−−チャンバー、２１
・・・・・・バルブケーシング、３８・・・・・・トー
ションバー、３９・・・・・・入力軸。FIG. 1 is a longitudinal side view showing an embodiment of the power steering device according to the present invention, FIG. 2 is a hydraulic circuit diagram thereof, FIG. 3 is a longitudinal side view showing an embodiment of the oil passage opening/closing valve, and FIG. 5 is an explanatory diagram showing the discharge flow rate characteristics of the oil pump, FIG. 6 is an explanatory diagram showing the upstream pressure of the orifice, and FIG. 7 is a diagram showing the upstream pressure of the pressure control valve. FIG. 8 is an explanatory diagram showing the pressure of the chamber (inlet/outlet side pressure chamber), and FIG. 8 is an explanatory diagram showing the pressure curve characteristics. 1a... Engine, 1b... Oil pump, 2... Oil passage switching valve, 3... Power cylinder, 4... Tank, 5. 5'...
...Reaction force piston, 7... Orifice, 8.
...High pressure oil path, 8'...Branch oil path, 9゜9', 9''...Low pressure oil path, 10...Oil path opening/closing valve, 11... Pressure control valve, 14...
・・Control spring, ′ 118a, 18
b, 18C, 18d--Chamber, 21
... Valve casing, 38 ... Torsion bar, 39 ... Input shaft.

Claims

[Scope of utility model registration request]

an oil passage switching rotary valve 2 that selectively distributes oil to the power cylinder 3 by switching the oil passage by relatively displacing the valve body 40 and the input shaft 39 using torsional displacement of the torsion bar 38; A plurality of reaction force pistons 5 arranged around the input shaft 39, an oil passage opening/closing valve 10 that opens when the vehicle is running at a certain speed or more, and a pressure control valve 11 that maintains the pressure of the hydraulic oil at a substantially constant pressure. The oil passage opening/closing valve 1
0 and the same pressure control valve 11 are interposed in the branch oil passage 8' extending from the middle of the high pressure oil passage 8 to the rear side chamber 6 of each reaction force piston 5, and each of the valves 2゜10.11 is the same. The pressure control valve 11 connects the oil passage 18b provided in the spool 13 and the spool 1 in parallel in the valve casing 21 of the spool 1.
Stroke regulation chamber 18C provided on both sides of 3.
18d and a control spring 14 provided within the same chamber 18C.