JPS6345378U

JPS6345378U -

Info

Publication number: JPS6345378U
Application number: JP14081786U
Authority: JP
Priority date: 1986-09-12
Filing date: 1986-09-12
Publication date: 1988-03-26

Description

[Brief explanation of the drawing]

第１図は本考案に係る後輪操舵装置の一例を示
す平面図、第２図は第１図の後輪操舵装置を備え
た車両の全体を機能的に示す図、第３図は第１図
のパワーシリンダ及び電磁切換えバルブの一部を
切断した拡大正面図、第４図は第３図の電磁切換
えバルブと可変オリフイスの関係を示す図、第５
図は目標舵角比の特性を示す図、及び第６図は中
立復帰用スプリングの特性を示す図である。符号の説明Ａ……前輪操舵装置、Ｂ……後輪操
舵装置、Ｃ……電気制御装置、ＦＷ１，ＦＷ２…
…前輪、ＲＷ１，ＲＷ２……後輪、２３……ステ
ツプモータ、２４……制御バルブ装置、３１……
リレーロツド、３２……ハウジング、３２ａ……
ラツクハウジング、３２ｂ……チユーブ、３２ｃ
……ハウジングエンド、４０……パワーシリンダ
、５０……電磁切換えバルブ、６３……アジヤス
トスクリユ、７０……中立復帰機構、７１，７２
……リテーナ、７４，７６……ストツパ、７７…
…スペーサ、７８……スプリング。 FIG. 1 is a plan view showing an example of a rear wheel steering device according to the present invention, FIG. 2 is a diagram functionally showing the entire vehicle equipped with the rear wheel steering device shown in FIG. 1, and FIG. Fig. 4 is a partially cutaway enlarged front view of the power cylinder and electromagnetic switching valve shown in Fig. 4; Fig. 4 is a diagram showing the relationship between the electromagnetic switching valve of Fig. 3 and the variable orifice;
This figure is a diagram showing the characteristics of the target steering angle ratio, and FIG. 6 is a diagram showing the characteristics of the neutral return spring. Explanation of symbols A...front wheel steering device, B...rear wheel steering device, C...electric control device, FW1, FW2...
...Front wheel, RW1, RW2...Rear wheel, 23...Step motor, 24...Control valve device, 31...
Relay rod, 32...Housing, 32a...
Rack housing, 32b...Tube, 32c
... Housing end, 40 ... Power cylinder, 50 ... Solenoid switching valve, 63 ... Adjustment screw, 70 ... Neutral return mechanism, 71, 72
...Retainer, 74, 76... Stopper, 77...
...Spacer, 78...Spring.

Claims

[Scope of utility model registration request]

A rear wheel steering device for a front and rear wheel steered vehicle having a relay rod that is displaceably assembled in a cylindrical housing in an axial direction and that steers left and right rear wheels connected to both ends in response to the displacement from a neutral position, wherein the housing The relay rod has a pair of oil chambers partitioned by a piston formed inside the relay rod and fixed to the relay rod. a power cylinder that displaces the relay rod in the other direction by supply; a pair of stopper portions provided on the outer periphery of the relay rod on the side of the power cylinder and spaced apart in the axial direction of the relay rod; and the pair of stoppers. a pair of stopper parts, which are mounted on the outer periphery of the relay rod so as to be slidable in the axial direction of the relay rod, and whose sliding movement from the inside to the outside of the pair of stopper parts is regulated by the pair of stopper parts; retainer and
a coil-shaped spring that passes through the relay rod and is supported by the pair of retainers at both ends to press the pair of retainers against the pair of stopper portions, respectively; and the pair of stopper portions when the relay rod is in a neutral position. and a pair of overhanging portions each extending toward the center at each position on the inner circumference of the housing facing the housing and regulating displacement of the pair of retainers with respect to the housing from the inside to the outside of each of the overhanging positions. Rear wheel steering device for front and rear wheel steered vehicles equipped with a neutral return mechanism.