JPS5962075U

JPS5962075U - power steering device

Info

Publication number: JPS5962075U
Application number: JP15701082U
Authority: JP
Inventors: 橘　義昭
Original assignee: 三菱自動車工業株式会社
Priority date: 1982-10-19
Filing date: 1982-10-19
Publication date: 1984-04-23

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のパワーステアリング装置を示す縦断面図
、第２図は第１図のロータリーバルブ部分の拡大縦断面
図、第３図は第１図のロータリーバルブ部分の拡大横断
面図、第４図Ａ、　Ｂは本案の一実施例を示すトーショ
ンバーとウオームシャフトの先端部分を構造を示す縦断
面図とそのｒＶ−■部分の横断面図、第５図は本実施例
の油圧制御機構を示す機構図、第６図は人、出力トルク
の関係を示す機能説明図である。１ニステアリングシヤフト、３ニド−ジョンバー、３ａ
：先端部、５：ウオームシャフト、５ａ：先端部、６：
ラックピストン、７：セクタシャフト、２０ａ：ロータ
、２０ｂニスリーブ、３０：ピストン、３１：リターン
バネ、３２：ストツバ、４０ニオイルポンプ、４１：流
量制御弁、４２二可変絞り弁、４６：車速センサー、４
７：コントローラー、ａ：０−タリーバルブ、Ａ、　Ｂ
、液室、Ｃ；　Ｄ、液圧室。 ■ ３９　　Ｉ＋Ｔ）３１　　！Ｓｏ　　ｔ：。（５）：＋）ＬＬ　　　　−Fig. 1 is a longitudinal sectional view showing a conventional power steering device, Fig. 2 is an enlarged longitudinal sectional view of the rotary valve portion in Fig. 1, Fig. 3 is an enlarged cross-sectional view of the rotary valve portion in Fig. 1, and Fig. 3 is an enlarged longitudinal sectional view of the rotary valve portion in Fig. 1. 4A and 4B are longitudinal cross-sectional views showing the structure of the torsion bar and the tip portion of the worm shaft, showing an embodiment of the present invention, and a cross-sectional view of the rV-■ portion thereof, and Fig. 5 is the hydraulic control mechanism of the present embodiment. FIG. 6 is a functional diagram showing the relationship between a person and output torque. 1 Ni steering shaft, 3 Ni dojo version, 3a
: Tip, 5: Worm shaft, 5a: Tip, 6:
Rack piston, 7: sector shaft, 20a: rotor, 20b sleeve, 30: piston, 31: return spring, 32: stop collar, 40 oil pump, 41: flow control valve, 42 variable throttle valve, 46: vehicle speed sensor, 4
7: Controller, a: 0-tally valve, A, B
, liquid chamber, C; D, hydraulic chamber. ■ 39 I+T) 31! So t:. (5) :+)LL-

Claims

[Scope of utility model registration request]

1. By differential movement of the rotary valve due to the torsion of a torsion bar directly connected to the steering shaft, hydraulic pressure is generated in opposition to the reaction force applied to the rack piston, which is threaded onto the worm shaft connected to the torsion bar. In the power steering device configured as above, a piston is interposed between the torsion bar and the tip of the worm shaft so that it can freely slide only in the axial direction, and the piston is connected to the torsion bar.
A hydraulic control mechanism for controlling the piston is connected to a hydraulic pressure chamber attached to the piston, and the piston is automatically controlled to a side where the effective length of the torsion bar is decreased by the hydraulic control mechanism at high vehicle speeds. A power steering device characterized by: