JPH0183672U - - Google Patents
Info
- Publication number
- JPH0183672U JPH0183672U JP1987180140U JP18014087U JPH0183672U JP H0183672 U JPH0183672 U JP H0183672U JP 1987180140 U JP1987180140 U JP 1987180140U JP 18014087 U JP18014087 U JP 18014087U JP H0183672 U JPH0183672 U JP H0183672U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- rear wheel
- valve sleeve
- hydraulic
- wheel 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
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 claims 4
- 238000006073 displacement reaction Methods 0.000 claims 2
- 230000007935 neutral effect Effects 0.000 claims 2
- 239000003921 oil Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Description
第１図は本考案の一実施例に係る後輪操舵装置
を備えた前後輪操舵車の全体概略図、第２図は第
１図のバルブの特性を示す特性図、第３図は第１
図の前後輪操舵車の操舵特性図、及び第４図は本
考案の他の実施例に係る後輪操舵装置を備えた前
後輪操舵車の全体概略図である。
符号の説明、Ａ…前輪操舵装置、Ｂ…後輪操舵
装置、Ｂ１…油圧変換機構、Ｂ２…油圧変更制御
機構、Ｂ３…後輪操舵機構、ＦＷ１，ＦＷ２…前
輪、ＲＷ１，ＲＷ２…後輪、ＢＤ…車体、Ｐ１〜
Ｐ６…導管、１４…操舵ハンドル、２１，４３，
６１，７１…バルブスリーブ、２２，４４，６２
，７２…バルブスプール、２９ａ，２９ｂ，４７
ａ，４７ｂ，５４ａ，５４ｂ，６６ａ，６６ｂ，
７４ａ，７４ｂ…スプリング、２６ａ，２６ｂ，
５１ａ，５１ｂ…油室、３２…バルブアセンブリ
、３３ａ，３３ｂ…アキユムレータ、４１…リレ
ーロツド、４２…パワーシリンダ、６５，７３…
油圧シリンダ。
1 is an overall schematic diagram of a front and rear wheel steered vehicle equipped with a rear wheel steering device according to an embodiment of the present invention, FIG. 2 is a characteristic diagram showing the characteristics of the valve in FIG. 1, and FIG. 3 is a diagram showing the characteristics of the valve in FIG.
The steering characteristic diagram of the front and rear wheel steered vehicle shown in the figure, and FIG. 4 is an overall schematic diagram of a front and rear wheel steered vehicle equipped with a rear wheel steering device according to another embodiment of the present invention. Explanation of symbols, A...Front wheel steering device, B...Rear wheel steering device, B1...Hydraulic pressure conversion mechanism, B2...Hydraulic pressure change control mechanism, B3...Rear wheel steering mechanism, FW1, FW2...Front wheels, RW1, RW2...Rear wheels, BD…Vehicle body, P1~
P6... Conduit, 14... Steering handle, 21, 43,
61, 71... Valve sleeve, 22, 44, 62
, 72...Valve spool, 29a, 29b, 47
a, 47b, 54a, 54b, 66a, 66b,
74a, 74b...Spring, 26a, 26b,
51a, 51b... Oil chamber, 32... Valve assembly, 33a, 33b... Accumulator, 41... Relay rod, 42... Power cylinder, 65, 73...
hydraulic cylinder.
Claims (1)
圧に変換する油圧変換機構と、前端にて前記油圧
変換機構に接続されて前記変換油圧を伝達する一
対の導管と、前記一対の導管の後端に接続され該
一対の導管を介して入力した油圧に基づき後輪を
該入力油圧に対応した操舵角に操舵する後輪操舵
機構とを備えた前後輪操舵車の後輪操舵装置にお
いて、 前記油圧変換機構を、 作動油の入出力ポートを有するとともに車体に
対して変位可能に組付けられたバルブスリーブ及
び前記バルブスリーブ内に摺動可能に組込まれて
該バルブスリーブとの相対的な変位に応じて作動
油の給排を制御するバルブスプールからなる倣い
バルブと、 前記バルブスリーブ又は前記バルブスプールの
どちらか一方を操舵ハンドルの回動に応じて駆動
する駆動機構と、 中立付勢装置を内蔵し前記倣いバルブによる作
動油の給排により該中立付勢装置に抗して前記バ
ルブスリーブと前記バルブスプールとの相対的な
変位をなくすように前記バルブスリーブ又は前記
バルブスプールのいずれか他方を変位させる倣い
機構と により構成するとともに、 前記倣い機構に対して給排される作動油を前記
変換油圧として前記一対の導管を介して後輪操舵
機構に伝達するようにしたことを特徴とする前後
輪操舵車の後輪操舵装置。[Scope of Claim for Utility Model Registration] A hydraulic conversion mechanism that converts the amount of rotation of a steering handle into hydraulic pressure corresponding to the amount of rotation, and a pair of conduits that are connected to the hydraulic pressure conversion mechanism at the front end and transmit the converted hydraulic pressure. , a rear wheel steering mechanism connected to the rear ends of the pair of conduits and configured to steer the rear wheels to a steering angle corresponding to the input oil pressure based on the oil pressure input through the pair of conduits. In the rear wheel steering device, the hydraulic conversion mechanism is provided with a valve sleeve having a hydraulic oil input/output port and displaceably assembled with respect to the vehicle body, and a valve sleeve slidably incorporated into the valve sleeve. a copying valve consisting of a valve spool that controls supply and discharge of hydraulic oil according to relative displacement between the valve sleeve and the valve spool; and a drive mechanism that drives either the valve sleeve or the valve spool according to rotation of a steering handle. , a neutral biasing device is built in, and the valve sleeve or the valve is configured to resist the neutral biasing device and eliminate relative displacement between the valve sleeve and the valve spool by supplying and discharging hydraulic oil by the copying valve. a copying mechanism that displaces either one of the spools, and the hydraulic oil supplied to and discharged from the copying mechanism is transmitted as the converted hydraulic pressure to the rear wheel steering mechanism via the pair of conduits. A rear wheel steering device for a vehicle with front and rear wheel steering, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18014087U JPH061906Y2 (en) | 1987-11-26 | 1987-11-26 | Rear wheel steering system for front and rear wheel steering vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18014087U JPH061906Y2 (en) | 1987-11-26 | 1987-11-26 | Rear wheel steering system for front and rear wheel steering vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0183672U true JPH0183672U (en) | 1989-06-02 |
| JPH061906Y2 JPH061906Y2 (en) | 1994-01-19 |
Family
ID=31471666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18014087U Expired - Lifetime JPH061906Y2 (en) | 1987-11-26 | 1987-11-26 | Rear wheel steering system for front and rear wheel steering vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH061906Y2 (en) |
-
1987
- 1987-11-26 JP JP18014087U patent/JPH061906Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH061906Y2 (en) | 1994-01-19 |
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