JPS63137103U - - Google Patents
Info
- Publication number
- JPS63137103U JPS63137103U JP3073987U JP3073987U JPS63137103U JP S63137103 U JPS63137103 U JP S63137103U JP 3073987 U JP3073987 U JP 3073987U JP 3073987 U JP3073987 U JP 3073987U JP S63137103 U JPS63137103 U JP S63137103U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- hydraulic
- steering
- hydraulic pump
- pressure control
- 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
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第1図〜第4図は本考案の実施例を示し、第1
図および第3図はそれぞれ第1および第2の実施
例における油圧回路図、第2図はホイール式油圧
シヨベルの側面図、第4図は第2の実施例の圧力
制御弁22の具体例を示す断面図である。第5図
は、第1図、第3図に相当する従来例を示す図で
ある。
1:ハンドル、2:ステアリングバルブ、4:
ステアリング用油圧ポンプ、6:ステアリングシ
リンダ、9:タイヤ、12……油圧パイロツト操
作バルブ、13:アキユムレータ、14:コント
ロールバルブ、18……油圧タンク、20:シー
ケンスバルブ、21:レデユーシングバルブ、2
2:圧力制御弁。
1 to 4 show embodiments of the present invention.
3 and 3 are hydraulic circuit diagrams of the first and second embodiments, respectively, FIG. 2 is a side view of a wheel-type hydraulic excavator, and FIG. 4 is a specific example of the pressure control valve 22 of the second embodiment. FIG. FIG. 5 is a diagram showing a conventional example corresponding to FIGS. 1 and 3. 1: Handle, 2: Steering valve, 4:
Hydraulic pump for steering, 6: Steering cylinder, 9: Tire, 12: Hydraulic pilot operation valve, 13: Accumulator, 14: Control valve, 18: Hydraulic tank, 20: Sequence valve, 21: Reducing valve, 2
2: Pressure control valve.
Claims (1)
アクチユエータに供給するステアリングバルブと
、作業用油圧アクチユエータの駆動を制御する油
圧パイロツト操作バルブとを備えた作業車両の油
圧回路において、 前記ステアリングバルブと油圧パイロツト操作
バルブに圧油を供給する単一の油圧ポンプと、 この油圧ポンプと前記油圧パイロツト操作バル
ブとの間に設けられ、前記油圧パイロツト操作バ
ルブに供給される圧力を制限する第1の圧力制御
弁と、 前記油圧ポンプと前記ステアリングバルブとの
間に設けられ、前記第1の圧力制御弁が圧力を制
限するときにのみ前記油圧ポンプを前記ステアリ
ングバルブと接続する第2の圧力制御弁とを設け
たことを特徴とする走行作業車両の油圧回路。[Scope of Claim for Utility Model Registration] In a hydraulic circuit for a work vehicle equipped with a steering valve that supplies an amount of oil to a steering actuator according to the operation of the steering wheel, and a hydraulic pilot operation valve that controls the drive of the work hydraulic actuator. , a single hydraulic pump that supplies pressure oil to the steering valve and the hydraulic pilot operating valve; and a single hydraulic pump provided between the hydraulic pump and the hydraulic pilot operating valve to limit the pressure supplied to the hydraulic pilot operating valve. a first pressure control valve that is provided between the hydraulic pump and the steering valve, and a second pressure control valve that connects the hydraulic pump with the steering valve only when the first pressure control valve limits pressure. A hydraulic circuit for a traveling work vehicle, characterized in that a pressure control valve is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3073987U JPS63137103U (en) | 1987-03-02 | 1987-03-02 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3073987U JPS63137103U (en) | 1987-03-02 | 1987-03-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63137103U true JPS63137103U (en) | 1988-09-09 |
Family
ID=30835827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3073987U Pending JPS63137103U (en) | 1987-03-02 | 1987-03-02 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63137103U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010144840A (en) * | 2008-12-19 | 2010-07-01 | Ube Machinery Corporation Ltd | Extrusion press |
-
1987
- 1987-03-02 JP JP3073987U patent/JPS63137103U/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010144840A (en) * | 2008-12-19 | 2010-07-01 | Ube Machinery Corporation Ltd | Extrusion press |
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