JPH02143272U - - Google Patents
Info
- Publication number
- JPH02143272U JPH02143272U JP5178989U JP5178989U JPH02143272U JP H02143272 U JPH02143272 U JP H02143272U JP 5178989 U JP5178989 U JP 5178989U JP 5178989 U JP5178989 U JP 5178989U JP H02143272 U JPH02143272 U JP H02143272U
- Authority
- JP
- Japan
- Prior art keywords
- rear wheel
- wheel steering
- displacement
- piston
- steering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- YVWNECBAHBJBSI-HZOWPXDZSA-N (2E,4E)-2,4,6-trimethyldeca-2,4-dienamide Chemical compound CCCCC(C)\C=C(/C)\C=C(/C)C(N)=O YVWNECBAHBJBSI-HZOWPXDZSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
Description
第１図は本考案に係る四輪操舵車の後輪転舵装
置の一実施例を示す後輪転舵用制御機構ユニツト
の要部断面図、第２図はその−線断面図、第
３図は前、後輪転舵角の関係を示す特性図、第４
図ａ，ｂは変位伝達遊びストロークを可変させる
構成を説明する概略斜視図および要部拡大図、第
５図ａ，ｂは第１図の−線断面図およびその
動きを示す説明図、第６図は第１図の−線断
面図、第７図はフイードバツク用ケーブル連結レ
バー部分の側面図、第８図は装置全体の概略構成
図、第９図はその電気回路図、第１０図ａ，ｂは
比例流量供給手段と後輪転舵用変位伝達制御機構
等との関係を示す油圧回路図およびその変形例図
である。
１……後輪側舵取リンク機構、２，３……前、
後輪転舵用パワーシリンダ、６，７……前、後輪
側オイルポンプ、１０……後輪転舵装置、１２…
…シリンダ、１３……ピストン、１４……後輪転
舵用変位伝達制御機構、１５……後輪転舵用制御
バルブ、１６……車速センサ、２０，２１……入
、出力軸、２２……切欠き溝、２３……係合手段
、３０……後輪転舵用制御機構ユニツト、３１…
…トーシヨンバー、３２……フイードバツク軸、
４０……フランジ部、４１，４２……係合部、４
３，４４……後輪転舵開始点検出スイツチ（ＳＷ
−Ａ，ＳＷ−Ｂ）。
Fig. 1 is a cross-sectional view of a main part of a rear wheel steering control mechanism unit showing an embodiment of the rear wheel steering device for a four-wheel steering vehicle according to the present invention, Fig. 2 is a cross-sectional view taken along the line - Characteristic diagram showing the relationship between front and rear wheel steering angles, 4th
Figures a and b are a schematic perspective view and an enlarged view of the main parts to explain the configuration for varying the displacement transmission play stroke, Figures 5 a and b are sectional views taken along the line - - of Figure 1 and an explanatory diagram showing its movement, Figure 6 The figures are a sectional view taken along the - line in Fig. 1, Fig. 7 is a side view of the feedback cable connection lever portion, Fig. 8 is a schematic configuration diagram of the entire device, Fig. 9 is its electrical circuit diagram, Fig. 10 a, b is a hydraulic circuit diagram showing the relationship between the proportional flow rate supply means and the rear wheel steering displacement transmission control mechanism, and a modification thereof; 1... Rear wheel side steering link mechanism, 2, 3... Front,
Power cylinder for rear wheel steering, 6, 7... Front and rear wheel side oil pumps, 10... Rear wheel steering device, 12...
... Cylinder, 13 ... Piston, 14 ... Displacement transmission control mechanism for rear wheel steering, 15 ... Control valve for rear wheel steering, 16 ... Vehicle speed sensor, 20, 21 ... In, output shaft, 22 ... Off Notch groove, 23... Engagement means, 30... Rear wheel steering control mechanism unit, 31...
...Torsion bar, 32...Feedback axis,
40...flange part, 41, 42...engaging part, 4
3, 44...Rear wheel turning start point detection switch (SW
-A, SW-B).
Claims (1)
によりシリンダ内で移動されるピストンを備え該
ピストンの移動位置に応じて前輪側での転舵変位
を可変遊びをもつて後輪側に伝達する後輪転舵用
変位伝達制御機構と、前輪側の転舵動作により回
動される入力軸とこれと同軸上に配置された出力
軸とからなり前記変位伝達制御機構を構成するピ
ストンを軸支する変位取出し軸と、この変位取出
し軸を介して伝達される前輪側転舵角度に応じて
後輪側油圧源からの油圧通路を切換え制御し後輪
転舵用パワーシリンダを作動させる後輪転舵用制
御バルブを備えてなり、前記入力軸またはピスト
ンの外周部の一部で周方向に異なる長さをもちか
つ周方向に所定間隔おいて第１および第２の係合
部を形成するとともに、これら各係合部に対し入
力軸への前輪転舵入力によつて機械的に係合、係
合解除される第１および第２の後輪転舵開始点検
出スイツチを設け、これら後輪転舵開始点検出ス
イツチにより後輪転舵制御系を後輪転舵可能状態
に制御するようにしたことを特徴とする四輪操舵
車の後輪転舵装置。 It has a piston that is moved within a cylinder by a hydraulic signal that is supplied under proportional control according to the vehicle speed, and the steering displacement at the front wheels is transmitted to the rear wheels with variable play depending on the movement position of the piston. A displacement transmission control mechanism for rear wheel steering, an input shaft rotated by the steering operation of the front wheels, and an output shaft disposed coaxially with the input shaft, which pivotally supports a piston constituting the displacement transmission control mechanism. A displacement takeoff shaft and a rear wheel steering control that switches and controls the hydraulic passage from the rear wheel hydraulic power source according to the front wheel steering angle transmitted via the displacement takeoff shaft and operates the rear wheel steering power cylinder. a valve, a first and a second engaging portion having different lengths in the circumferential direction and at a predetermined interval in the circumferential direction are formed on a part of the outer peripheral portion of the input shaft or the piston, and The engaging portion is provided with first and second rear wheel turning start point detection switches that are mechanically engaged and disengaged by the front wheel turning input to the input shaft, and these switches are used to detect the rear wheel turning start point. A rear wheel steering device for a four-wheel steering vehicle, characterized in that a switch controls a rear wheel steering control system to enable rear wheel steering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5178989U JP2504647Y2 (en) | 1989-05-01 | 1989-05-01 | Rear-wheel steering system for four-wheel steering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5178989U JP2504647Y2 (en) | 1989-05-01 | 1989-05-01 | Rear-wheel steering system for four-wheel steering vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02143272U true JPH02143272U (en) | 1990-12-05 |
| JP2504647Y2 JP2504647Y2 (en) | 1996-07-10 |
Family
ID=31571528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5178989U Expired - Lifetime JP2504647Y2 (en) | 1989-05-01 | 1989-05-01 | Rear-wheel steering system for four-wheel steering vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2504647Y2 (en) |
-
1989
- 1989-05-01 JP JP5178989U patent/JP2504647Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2504647Y2 (en) | 1996-07-10 |
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