JPH0256770U - - Google Patents
Info
- Publication number
- JPH0256770U JPH0256770U JP11690889U JP11690889U JPH0256770U JP H0256770 U JPH0256770 U JP H0256770U JP 11690889 U JP11690889 U JP 11690889U JP 11690889 U JP11690889 U JP 11690889U JP H0256770 U JPH0256770 U JP H0256770U
- Authority
- JP
- Japan
- Prior art keywords
- steering
- hydraulic cylinder
- valve
- switching valve
- output port
- 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
- 238000010586 diagram Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Description
第１図は各種操向状態を上方を前方として示す
車輪の平面図でａは前輪操向状態、ｂはクランプ
操向状態、ｃはクラブ操向状態であり、第２図は
従来のステアリング装置をその油圧回路と共に示
す概略平面図、第３図は第２図の装置の異なる状
態を示す部分図、第４図は他の従来のステアリン
グ装置の油圧回路図、第５図はこの考案の実施例
の油圧回路図、第６図は同実施例の各切換弁の切
換位置選択装置の１例を示す電気回路図、第７図
乃至第１０図は夫々第５図と同じ油圧回路図の異
なる状態を示す油圧回路図、第１１図は第５図の
実施例のバルブユニツトの変形例を示す油圧回路
図である。
ＳＨ……ステアリングホイール、ＳＶ……ステ
アリングバルブ、Ｆ……前輪ステアリング、Ｒ…
…後輪ステアリング、Ｖ１，Ｖ２，Ｖ３……切換
弁（Ｖ１とＶ３……第１切換弁部、Ｖ２……第２
切換弁部）、Ｆ１，Ｆ１′……前輪、Ｒ１，Ｒ１
′……後輪、Ｆ６，Ｆ６′……前輪ステアリング
の油圧シリンダ、Ｒ６，Ｒ６′……後輪ステアリ
ングの油圧シリンダ。
Fig. 1 is a plan view of the wheels showing various steering states with the upper side facing forward; a shows the front wheel steering state, b shows the clamp steering state, c shows the club steering state, and Fig. 2 shows a conventional steering system. 3 is a partial view showing different states of the device in FIG. 2, FIG. 4 is a hydraulic circuit diagram of another conventional steering device, and FIG. 5 is a diagram showing the implementation of this invention. FIG. 6 is an electric circuit diagram showing an example of the switching position selection device for each switching valve of the same embodiment, and FIGS. 7 to 10 are the same hydraulic circuit diagrams as FIG. 5 but different from each other. FIG. 11 is a hydraulic circuit diagram showing a modification of the valve unit of the embodiment shown in FIG. 5. SH...Steering wheel, SV...Steering valve, F...Front wheel steering, R...
... Rear wheel steering, V 1 , V 2 , V 3 ... switching valves (V 1 and V 3 ... first switching valve section, V 2 ... second switching valve section)
(switching valve part), F 1 , F 1 '...Front wheel, R 1 , R 1
'...Rear wheel, F6 , F6 '...Hydraulic cylinder for front wheel steering, R6 , R6 '...Hydraulic cylinder for rear wheel steering.
Claims (1)
イールの操作方向及び操作量に応じて圧油を互い
に逆に吐出または吸入する２つの出力ポートを備
えたステアリングバルブと、油圧シリンダにより
操向される前輪ステアリング及び後輪ステアリン
グとを備え、前記ステアリングバルブの出力ポー
トが切換弁を介して前記前輪ステアリングと後輪
ステアリングとの夫々の油圧シリンダに接続する
ステアリング装置において、上記切換弁が、前記
前輪ステアリングの油圧シリンダと前記ステアリ
ングバルブの一方の出力ポートとの間に設けられ
た第１切換弁部と、前記後輪ステアリングの油圧
シリンダと前記ステアリングバルブの他方の出力
ポートとの間に設けられた第２切換弁部とからな
り、この第１切換弁部と第２切換弁部とは、各々
が別々に切換わるようになつており、前記前輪ス
テアリングと後輪ステアリングの油圧シリンダの
各々に前記ステアリングバルブの一方の出力ポー
トと他方の出力ポートとの接続を対応する油圧シ
リンダの作動方向が反対になるように切換えかつ
油圧シリンダの排出側を接続する各々の切換位置
と、前記ステアリングバルブの２つの出力ポート
を共に前記前輪ステアリングの油圧シリンダと前
記後輪ステアリングの油圧シリンダとに対して切
換え接続しかつその接続をした残余の前輪ステア
リングの油圧シリンダまたは後輪ステアリングの
油圧シリンダを閉鎖する他の２組の切換位置とを
設けられていることを特徴とするステアリング装
置。 A steering valve that is linked to the steering wheel and has two output ports that discharge or inhale pressurized oil in the opposite direction depending on the direction and amount of operation of the steering wheel, and the front wheel steering and rear wheel steering that are steered by hydraulic cylinders. In the steering device, the output port of the steering valve is connected to the respective hydraulic cylinders of the front wheel steering and the rear wheel steering via a switching valve, wherein the switching valve is connected to the hydraulic cylinder of the front wheel steering and the hydraulic cylinder of the rear wheel steering. a first switching valve section provided between one output port of the valve; and a second switching valve section provided between the hydraulic cylinder of the rear wheel steering and the other output port of the steering valve. The first switching valve section and the second switching valve section are configured to be switched separately, and one output port of the steering valve is connected to each of the hydraulic cylinders for the front wheel steering and the rear wheel steering. and the other output port are switched so that the working direction of the corresponding hydraulic cylinder is opposite, and the discharge side of the hydraulic cylinder is connected to each switching position, and both of the two output ports of the steering valve are connected to the front wheel. a steering hydraulic cylinder and two other sets of switching positions that are switchably connected to the rear steering hydraulic cylinder and close the remaining front steering hydraulic cylinder or the rear steering hydraulic cylinder connected thereto; A steering device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989116908U JPH0535035Y2 (en) | 1989-10-04 | 1989-10-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989116908U JPH0535035Y2 (en) | 1989-10-04 | 1989-10-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0256770U true JPH0256770U (en) | 1990-04-24 |
| JPH0535035Y2 JPH0535035Y2 (en) | 1993-09-06 |
Family
ID=31359879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989116908U Expired - Lifetime JPH0535035Y2 (en) | 1989-10-04 | 1989-10-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535035Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4917171A (en) * | 1972-05-23 | 1974-02-15 | ||
| JPS5643063A (en) * | 1979-09-18 | 1981-04-21 | Komatsu Ltd | Steering device for travelling vehicle |
-
1989
- 1989-10-04 JP JP1989116908U patent/JPH0535035Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4917171A (en) * | 1972-05-23 | 1974-02-15 | ||
| JPS5643063A (en) * | 1979-09-18 | 1981-04-21 | Komatsu Ltd | Steering device for travelling vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0535035Y2 (en) | 1993-09-06 |
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