JPS6455171U - - Google Patents
Info
- Publication number
- JPS6455171U JPS6455171U JP15180787U JP15180787U JPS6455171U JP S6455171 U JPS6455171 U JP S6455171U JP 15180787 U JP15180787 U JP 15180787U JP 15180787 U JP15180787 U JP 15180787U JP S6455171 U JPS6455171 U JP S6455171U
- Authority
- JP
- Japan
- Prior art keywords
- pair
- valve
- elliptical gear
- spool
- rear wheel
- 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 3
- 230000007935 neutral effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Description
第１図は本考案の一実施例を示す後輪操舵装置
を備えた前後輪操舵車の全体概略図、第２図は第
１図の歯車機構、カム部材及びスプールバルブの
詳細を示す破断図、第３図は第２図の―線に
沿つて見た第３及び第４ギヤの取付け構造図、第
４図は操舵ハンドルの回転角、カム部材の回転角
、バルブスプールの変位量及びスプールバルブに
よる発生油圧の特性図、第５図はカムの特性図、
第６図は左右後輪の左右前輪に対する操舵特性図
である。
符号の説明、１２……操舵ハンドル、１５……
操舵軸、２５……歯車機構、２５ａ，２５ｂ，２
５ｃ，２５ｄ……ギヤ、２６……カム部材、２７
……スプールバルブ、２７ａ……バルブスプール
、２７ｂ……バルブスリーブ、２８……カムフオ
ロア、３２……油圧ポンプ、３４ａ，３４ｂ……
導管、３５……油圧シリンダ、３５ｄ……ピスト
ンロツド、３６ａ，３６ｂ……スプリング、３７
……レバー、４１……リレーロツド、４４……ス
プールバルブ、４５……パワーシリンダ、４６…
…油圧ポンプ、ＦＷ１，ＦＷ２……前輪、ＲＷ１
，ＲＷ２……後輪。
Fig. 1 is an overall schematic view of a front and rear wheel steered vehicle equipped with a rear wheel steering device showing one embodiment of the present invention, and Fig. 2 is a cutaway view showing details of the gear mechanism, cam member, and spool valve shown in Fig. 1. , Fig. 3 is a diagram of the installation structure of the third and fourth gears seen along the line - in Fig. 2, and Fig. 4 shows the rotation angle of the steering handle, the rotation angle of the cam member, the amount of displacement of the valve spool, and the spool. A characteristic diagram of the hydraulic pressure generated by the valve, Figure 5 is a characteristic diagram of the cam,
FIG. 6 is a steering characteristic diagram for the left and right rear wheels and the left and right front wheels. Explanation of symbols, 12... Steering handle, 15...
Steering shaft, 25...Gear mechanism, 25a, 25b, 2
5c, 25d... Gear, 26... Cam member, 27
... Spool valve, 27a ... Valve spool, 27b ... Valve sleeve, 28 ... Cam follower, 32 ... Hydraulic pump, 34a, 34b ...
Conduit, 35...Hydraulic cylinder, 35d...Piston rod, 36a, 36b...Spring, 37
... Lever, 41 ... Relay rod, 44 ... Spool valve, 45 ... Power cylinder, 46 ...
...Hydraulic pump, FW1, FW2...Front wheel, RW1
, RW2...Rear wheel.
Claims (1)
円ギヤ及び該入力用楕円ギヤに噛合した出力用楕
円ギヤからなる歯車機構と、前記出力用楕円ギヤ
の回転軸に接続され前記出力用楕円ギヤの回転に
応じて回転するカム部材と、該カム部材のカム面
に一端にて係合して同カム部材の回転に応じて軸
方向に変位するバルブスプールを有し該バルブス
プールとバルブスリーブとの相対的変位に応じた
油圧力を発生するスプールバルブと、該スプール
バルブに各一端にてそれぞれ接続され前記油圧力
を伝達する一対の導管と、該一対の導管の各他端
にそれぞれ接続された一対の油室を有し前記油圧
力に応じてピストンロツドを駆動する油圧シリン
ダと、前記ピストンロツドを中立位置に付勢する
スプリングと、前記ピストンロツドの中立位置か
らの変位に応じて駆動されて後輪を操舵する操舵
機構とを備えたことを特徴とする前後輪操舵車の
後輪操舵装置。 a gear mechanism consisting of an input elliptical gear that rotates in response to rotation of the steering handle and an output elliptical gear meshed with the input elliptical gear; and an output elliptical gear connected to the rotating shaft of the output elliptical gear A cam member that rotates in accordance with the rotation, and a valve spool that engages at one end with a cam surface of the cam member and is displaced in the axial direction in accordance with the rotation of the cam member, and the valve spool and the valve sleeve are connected to each other. a spool valve that generates hydraulic pressure according to relative displacement; a pair of conduits connected at one end to the spool valve to transmit the hydraulic pressure; and a pair of conduits connected to the other ends of the pair of conduits, respectively. A hydraulic cylinder has a pair of oil chambers and drives a piston rod according to the hydraulic pressure, a spring biases the piston rod to a neutral position, and a hydraulic cylinder drives the rear wheel according to the displacement of the piston rod from the neutral position. A rear wheel steering device for a front and rear wheel steered vehicle, comprising a steering mechanism for steering the vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15180787U JPH061508Y2 (en) | 1987-10-02 | 1987-10-02 | Rear wheel steering system for front and rear wheel steering vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15180787U JPH061508Y2 (en) | 1987-10-02 | 1987-10-02 | Rear wheel steering system for front and rear wheel steering vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6455171U true JPS6455171U (en) | 1989-04-05 |
| JPH061508Y2 JPH061508Y2 (en) | 1994-01-12 |
Family
ID=31426177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15180787U Expired - Lifetime JPH061508Y2 (en) | 1987-10-02 | 1987-10-02 | Rear wheel steering system for front and rear wheel steering vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH061508Y2 (en) |
-
1987
- 1987-10-02 JP JP15180787U patent/JPH061508Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH061508Y2 (en) | 1994-01-12 |
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