JPH01154075U - - Google Patents
Info
- Publication number
- JPH01154075U JPH01154075U JP5190988U JP5190988U JPH01154075U JP H01154075 U JPH01154075 U JP H01154075U JP 5190988 U JP5190988 U JP 5190988U JP 5190988 U JP5190988 U JP 5190988U JP H01154075 U JPH01154075 U JP H01154075U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic pump
- power steering
- actuator
- operating
- valve mechanism
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Description
図面は、本考案に係る作業用走行機体のパワー
ステアリング装置の実施例を示したものであつて
、第１図は農用トラクタの概略側面図、第２図は
同上要部正面図、第３図はフロントアクスル部の
平面図、第４図はパワーステアリング用油圧シリ
ンダの正面図、第５図はパワーステアリング機構
の油圧制御回路概略図、第６図は制御機構のブロ
ツク回路図、第７図は制御システムのフローチヤ
ート図、第８図Ａ、Ｂはエンジンの始動時、停止
時における第二切換えバルブの切換え状態を示す
作用説明図、第９図は横滑り補正手段においてス
リツプ率と修正操蛇角との関係を示すグラフ図で
ある。
図中、１は走行機体、３，４は油圧ポンプ、６
，１０は油圧シリンダ、２１は切換えバルブ、２
２は制御部である。
The drawings show an embodiment of the power steering device for a working traveling vehicle according to the present invention, in which Fig. 1 is a schematic side view of an agricultural tractor, Fig. 2 is a front view of the same essential parts, and Fig. 3 is a schematic side view of an agricultural tractor. 4 is a front view of the power steering hydraulic cylinder, FIG. 5 is a schematic diagram of the hydraulic control circuit of the power steering mechanism, FIG. 6 is a block circuit diagram of the control mechanism, and FIG. 7 is a plan view of the front axle. Flowchart of the control system, Figures 8A and B are operation explanatory diagrams showing the switching state of the second switching valve when starting and stopping the engine, and Figure 9 is a diagram showing the slip ratio and correction steering angle in the sideslip correction means. FIG. In the figure, 1 is the traveling aircraft, 3 and 4 are hydraulic pumps, and 6
, 10 is a hydraulic cylinder, 21 is a switching valve, 2
2 is a control section.
Claims (1)
の第一油圧ポンプとパワーステアリング用の第二
油圧ポンプとを備えてなる作業用走行機体におい
て、前記第一油圧ポンプからのアクチユエータ作
動用油路と第二油圧ポンプからのパワーステアリ
ング用油路との間に、第一油圧ポンプからの圧油
をパワーステアリング用油路側に供給すべく切換
え可能な切換えバルブ機構を設け、該切換えバル
ブ機構を、第二油圧ポンプからの圧油供給が充分
でないことの検知に基づいて切換えバルブ機構を
開作動させるよう切換え指令を出す制御部に連結
したことを特徴とする作業用走行機体のパワース
テアリング装置。 In a work traveling machine comprising a first hydraulic pump for operating an actuator such as lifting and lowering a working part, and a second hydraulic pump for power steering, an oil passage for operating the actuator from the first hydraulic pump and a second hydraulic pump for operating the actuator are provided. A switchable valve mechanism is provided between the power steering oil passage from the hydraulic pump and a switching valve mechanism that can be switched to supply pressure oil from the first hydraulic pump to the power steering oil passage. A power steering device for a work traveling aircraft, characterized in that the power steering device is connected to a control section that issues a switching command to open a switching valve mechanism based on detection that the supply of pressure oil from a pump is insufficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5190988U JPH01154075U (en) | 1988-04-18 | 1988-04-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5190988U JPH01154075U (en) | 1988-04-18 | 1988-04-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01154075U true JPH01154075U (en) | 1989-10-24 |
Family
ID=31277925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5190988U Pending JPH01154075U (en) | 1988-04-18 | 1988-04-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01154075U (en) |
-
1988
- 1988-04-18 JP JP5190988U patent/JPH01154075U/ja active Pending