JPH035769U - - Google Patents
Info
- Publication number
- JPH035769U JPH035769U JP6645889U JP6645889U JPH035769U JP H035769 U JPH035769 U JP H035769U JP 6645889 U JP6645889 U JP 6645889U JP 6645889 U JP6645889 U JP 6645889U JP H035769 U JPH035769 U JP H035769U
- Authority
- JP
- Japan
- Prior art keywords
- swing
- arm
- check valve
- valve
- switching valve
- 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 2
Landscapes
- Operation Control Of Excavators (AREA)
Description
第1図はこの考案にかかる切換弁をそなえた旋
回優先システムの油圧回路図、第2図、第3図は
それぞれこの考案にかかる切換弁の断面図、第4
図は従来技術切換弁をそなえた旋回優先システム
の油圧回路図である。
1,2……リモコン弁、3……旋回モータ、4
……アームシリンダ、5……旋回切換弁、6,2
8……アーム切換弁、10……メインポンプ、1
1……パイロツトポンプ、24……ヘツド側油室
、26……ロツド側油室、29……第1チエツク
弁、30……第2チエツク弁、33……スプール
。
FIG. 1 is a hydraulic circuit diagram of a swing priority system equipped with a switching valve according to this invention, FIGS. 2 and 3 are sectional views of the switching valve according to this invention, and FIG.
The figure is a hydraulic circuit diagram of a swing priority system equipped with a conventional switching valve. 1, 2...Remote control valve, 3...Swivel motor, 4
...Arm cylinder, 5...Swivel switching valve, 6,2
8... Arm switching valve, 10... Main pump, 1
1... Pilot pump, 24... Head side oil chamber, 26... Rod side oil chamber, 29... First check valve, 30... Second check valve, 33... Spool.
Claims (1)
アクチユエータを作動せしめ、旋回・アーム引き
同時操作時に旋回優先機能を発揮せしめるように
したアーム用切換弁において、アーム用切換弁内
のスプールに第1チエツク弁と第2チエツク弁を
設け、旋回・アーム引き同時操作時に旋回用リモ
ートコントロール弁より導出されるパイロツト圧
を上記第1チエツク弁に作用させてアームシリン
ダ用ロツド側油室からの戻り油を流通止めさせる
ようにするとともに、上記戻り油の多量分をアー
ムシリンダ用ヘツド側油室に再生流入せしめるよ
うに構成したことを特徴とする旋回優先機能を有
する切換弁。 In an arm switching valve that operates various hydraulic actuators by operating a remote control valve, and exhibits a swing priority function during simultaneous swing and arm pull operations, a first check valve and a second check valve are installed on the spool inside the arm switching valve. A check valve is provided, and the pilot pressure derived from the swing remote control valve is applied to the first check valve during simultaneous swing and arm pull operations to stop the flow of return oil from the arm cylinder rod side oil chamber. A switching valve having a swing priority function, characterized in that a large amount of the return oil is regenerated and allowed to flow into the head side oil chamber for the arm cylinder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6645889U JPH089237Y2 (en) | 1989-06-06 | 1989-06-06 | Switching valve with swivel priority function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6645889U JPH089237Y2 (en) | 1989-06-06 | 1989-06-06 | Switching valve with swivel priority function |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH035769U true JPH035769U (en) | 1991-01-21 |
JPH089237Y2 JPH089237Y2 (en) | 1996-03-13 |
Family
ID=31599197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6645889U Expired - Lifetime JPH089237Y2 (en) | 1989-06-06 | 1989-06-06 | Switching valve with swivel priority function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH089237Y2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008075648A1 (en) * | 2006-12-18 | 2008-06-26 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive device for hydraulic excavator |
-
1989
- 1989-06-06 JP JP6645889U patent/JPH089237Y2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008075648A1 (en) * | 2006-12-18 | 2008-06-26 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive device for hydraulic excavator |
KR101425245B1 (en) * | 2006-12-18 | 2014-08-01 | 히다찌 겐끼 가부시키가이샤 | Hydraulic drive device for hydraulic excavator |
US8800278B2 (en) | 2006-12-18 | 2014-08-12 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive device for hydraulic excavator |
Also Published As
Publication number | Publication date |
---|---|
JPH089237Y2 (en) | 1996-03-13 |