JPH0441559U - - Google Patents
Info
- Publication number
- JPH0441559U JPH0441559U JP8205690U JP8205690U JPH0441559U JP H0441559 U JPH0441559 U JP H0441559U JP 8205690 U JP8205690 U JP 8205690U JP 8205690 U JP8205690 U JP 8205690U JP H0441559 U JPH0441559 U JP H0441559U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- hydraulic actuator
- working machine
- oil
- merging
- 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
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図は本考案の一実施例を示す油圧回路図、
第２図は走行駆動力とアーム用油圧シリンダ力を
示す力線図、第３図はバケツト刃先の軌跡を示す
図、第４図は従来例を示す油圧回路図である。
１……アーム、２……バケツト、３……アーム
用油圧シリンダ、４……油圧ポンプ、５……制御
弁、２１……エンジン、２２……トルクコンバー
タ、２３……走行駆動機構、２４……パイロツト
油圧式合流切換弁、２５，２６……パイロツトラ
イン。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention;
FIG. 2 is a force line diagram showing the traveling driving force and arm hydraulic cylinder force, FIG. 3 is a diagram showing the locus of the bucket tip, and FIG. 4 is a hydraulic circuit diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1... Arm, 2... Bucket, 3... Hydraulic cylinder for arm, 4... Hydraulic pump, 5... Control valve, 21... Engine, 22... Torque converter, 23... Travel drive mechanism, 24... ...Pilot hydraulic merging switching valve, 25, 26...Pilot line.
Claims (1)
動用の油圧アクチユエータと、 合流位置に切り換えられると、油圧アクチユエ
ータの出口ポートからの戻り油を前記油圧ポンプ
からの吐出油と合流させて前記油圧アクチユエー
タの入口ポートに導く合流切換弁とを備える作業
機の油圧回路において、 前記油圧アクチユエータの負荷圧力が所定値以
下のとき、前記合流切換弁を前記合流位置に切り
換える手段を具備することを特徴とする作業機の
油圧回路。[Claims for Utility Model Registration] A hydraulic actuator for driving a working machine driven by oil discharged from a hydraulic pump, and a hydraulic actuator for driving a working machine that is driven by oil discharged from a hydraulic pump, and when the hydraulic actuator is switched to a merging position, return oil from an outlet port of the hydraulic actuator is discharged from the hydraulic pump. In a hydraulic circuit for a working machine, the hydraulic circuit includes a merging switching valve that merges oil and guides the fluid to an inlet port of the hydraulic actuator, wherein the merging switching valve is switched to the merging position when the load pressure of the hydraulic actuator is less than or equal to a predetermined value. A hydraulic circuit for a working machine, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8205690U JPH0441559U (en) | 1990-08-01 | 1990-08-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8205690U JPH0441559U (en) | 1990-08-01 | 1990-08-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0441559U true JPH0441559U (en) | 1992-04-08 |
Family
ID=31628535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8205690U Pending JPH0441559U (en) | 1990-08-01 | 1990-08-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441559U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003521652A (en) * | 2000-02-04 | 2003-07-15 | オー ウント カー オーレンスタイン ウント コツペル アクチエンゲゼルシヤフト | In particular, a method and apparatus for controlling a lifting cylinder of a work machine. |
| JP2010210072A (en) * | 2009-03-12 | 2010-09-24 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic control system for working machine |
| JP2010230061A (en) * | 2009-03-26 | 2010-10-14 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic control circuit for construction machine |
| JP2016200177A (en) * | 2015-04-08 | 2016-12-01 | 古河ユニック株式会社 | Booster valve device |
| JP2020007160A (en) * | 2019-09-26 | 2020-01-16 | 古河ユニック株式会社 | Speed increase valve device |
| JP2023111311A (en) * | 2022-01-31 | 2023-08-10 | 三陽機器株式会社 | Switching valve used in the hydraulic circuit of lifting equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0262953B2 (en) * | 1985-07-02 | 1990-12-27 | Sanyo Electric Co |
-
1990
- 1990-08-01 JP JP8205690U patent/JPH0441559U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0262953B2 (en) * | 1985-07-02 | 1990-12-27 | Sanyo Electric Co |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003521652A (en) * | 2000-02-04 | 2003-07-15 | オー ウント カー オーレンスタイン ウント コツペル アクチエンゲゼルシヤフト | In particular, a method and apparatus for controlling a lifting cylinder of a work machine. |
| JP2010210072A (en) * | 2009-03-12 | 2010-09-24 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic control system for working machine |
| JP2010230061A (en) * | 2009-03-26 | 2010-10-14 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic control circuit for construction machine |
| JP2016200177A (en) * | 2015-04-08 | 2016-12-01 | 古河ユニック株式会社 | Booster valve device |
| JP2020007160A (en) * | 2019-09-26 | 2020-01-16 | 古河ユニック株式会社 | Speed increase valve device |
| JP2023111311A (en) * | 2022-01-31 | 2023-08-10 | 三陽機器株式会社 | Switching valve used in the hydraulic circuit of lifting equipment |
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