JPH0483885U

JPH0483885U -

Info

Publication number: JPH0483885U
Application number: JP12733490U
Authority: JP
Priority date: 1990-11-29
Filing date: 1990-11-29
Publication date: 1992-07-21

Description

[Brief explanation of drawings]

第１図〜第３図は本考案による四輪操舵装置の
第１実施例を示し、第１図は後輪舵取装置の縦断
面図、第２図は要部の部分拡大断面図、第３図は
全体の概略平面図である。第４図〜第６図は第２
実施例を示し、第４図は第１実施例との相違部分
の断面図、第５図は要部の部分拡大断面図、第６
図は第５図の−断面図である。第７図及び第
８図は出願人が先に提案した従来技術の要部の断
面図、第８図は第７図の−断面図である。符号の説明、１０……前輪舵取装置、２０……
後輪舵取装置、２１……ハウジング、２２……入
力部材（作動軸）、２３……トーシヨンバー、２
４……出力部材（出力軸）、５０……後輪サーボ
弁、５３……後輪パワーシリンダ、６０……供給
ポンプ、７１，７６……係合部材、７５，８０…
…被係合部（凹部）。 1 to 3 show a first embodiment of the four-wheel steering device according to the present invention, FIG. 1 is a longitudinal sectional view of the rear wheel steering device, FIG. 2 is a partial enlarged sectional view of the main part, and FIG. FIG. 3 is a schematic plan view of the entire structure. Figures 4 to 6 are 2
Embodiment 4 is a sectional view of the difference from the first embodiment, FIG. 5 is a partially enlarged sectional view of the main part, and FIG.
The figure is a - sectional view of FIG. 7 and 8 are cross-sectional views of the main parts of the prior art proposed earlier by the applicant, and FIG. 8 is a cross-sectional view taken from FIG. 7. Explanation of symbols, 10... Front wheel steering device, 20...
Rear wheel steering device, 21...Housing, 22...Input member (operating shaft), 23...Torsion bar, 2
4... Output member (output shaft), 50... Rear wheel servo valve, 53... Rear wheel power cylinder, 60... Supply pump, 71, 76... Engagement member, 75, 80...
...Engaged part (concave part).

Claims

[Scope of utility model registration request]

A front wheel steering device that steers the front wheels; and a rear wheel steering device that is connected to the front wheel steering device via a mechanical transmission device to steer the rear wheels. A rear wheel power cylinder that generates a steering assist force, an input member that is actuated in response to steering of the front wheels via the mechanical transmission device and rotatably supported by the housing, and rotationally connected to the input member via a torsion bar. a rear wheel servo valve that is operated according to the relative rotation of the input member and the output member and controls the supply and discharge of working fluid from the supply pump to the working chamber of the rear wheel power cylinder to operate the rear wheel power cylinder. In a four-wheel steering device that is a power steering device, the input member and a member that rotates relative to the input member have engaged parts that engage with each other at a neutral steering position and an elastically biased member. A four-wheel steering device comprising an engaging member.