JPS62147703U - - Google Patents
Info
- Publication number
- JPS62147703U JPS62147703U JP3453086U JP3453086U JPS62147703U JP S62147703 U JPS62147703 U JP S62147703U JP 3453086 U JP3453086 U JP 3453086U JP 3453086 U JP3453086 U JP 3453086U JP S62147703 U JPS62147703 U JP S62147703U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic cylinder
- switching valve
- pilot pressure
- valve
- oil chamber
- 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
- 230000008929 regeneration Effects 0.000 claims description 7
- 238000011069 regeneration method Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Description
第１図は本考案の第１実施例を示すシリンダ駆
動回路図、第２図は回生制御弁の特性図、第３図
は回生制御弁の原理説明図、第４図は第２実施例
のシリンダ駆動回路図、第５図は従来例のシリン
ダ駆動回路図である。
１：油圧シリンダ、２ａ，２ｂ：油室、３：油
圧ポンプ、４：方向切換弁、５：パイロツト圧供
給切換弁、８，８′：パイロツト圧切換弁、９：
回生制御弁、１０：タンク、ｌ１，ｌ２：管路、
ｌ３〜ｌ９：パイロツト管路。
Fig. 1 is a cylinder drive circuit diagram showing the first embodiment of the present invention, Fig. 2 is a characteristic diagram of the regeneration control valve, Fig. 3 is a diagram explaining the principle of the regeneration control valve, and Fig. 4 is a diagram of the second embodiment. Cylinder Drive Circuit Diagram FIG. 5 is a cylinder drive circuit diagram of a conventional example. 1: Hydraulic cylinder, 2a, 2b: Oil chamber, 3: Hydraulic pump, 4: Directional switching valve, 5: Pilot pressure supply switching valve, 8, 8': Pilot pressure switching valve, 9:
Regeneration control valve, 10: tank, l 1 , l 2 : pipe line,
l3 to l9 : Pilot pipes.
Claims (1)
ンダの両油室との間の両管路に方向切換弁を介装
し、前記油圧ポンプの容量制御および前記方向切
換弁の切換制御をするパイロツト圧供給切換弁を
付設した油圧シリンダ駆動回路において、前記方
向切換弁と前記油圧シリンダ間の前記両管路間に
、前記油圧シリンダの重量負荷による同負荷側へ
の作動時に切換えられ同油圧シリンダの重量負荷
側油室から負圧側油室に絞り開口比で連通し同負
圧側油室への圧油供給を確保してシリンダ作動速
度を制御する回生制御弁を設け、前記パイロツト
圧供給切換弁のパイロツト圧出口に設けられ前記
重量負荷側油室の重量負荷圧で切換えられて前記
方向切換弁を中立とし前記油圧ポンプを小容量運
転としかつ前記回生制御弁を回生作動側に切換え
るパイロツト圧切換弁を設けたことを特徴とする
油圧シリンダの戻り油回生回路。 A variable displacement hydraulic pump and a pilot pressure supply switching system that includes a directional switching valve interposed in both pipelines between a tank and both oil chambers of a hydraulic cylinder, and controls the capacity of the hydraulic pump and the switching of the directional switching valve. In a hydraulic cylinder drive circuit provided with a valve, between the two pipes between the directional control valve and the hydraulic cylinder, when the hydraulic cylinder is operated to the same load side due to a weight load, the hydraulic cylinder is switched to the weight load side of the hydraulic cylinder. A regeneration control valve is provided that communicates from the oil chamber to the negative pressure side oil chamber at a throttle opening ratio to ensure the supply of pressure oil to the negative pressure side oil chamber and controls the cylinder operating speed, and the pilot pressure outlet of the pilot pressure supply switching valve is provided. A pilot pressure switching valve is provided in the pilot pressure switching valve, which is switched by the weight load pressure of the weight load side oil chamber to set the directional switching valve to neutral, set the hydraulic pump to small capacity operation, and switch the regeneration control valve to the regeneration operating side. A return oil regeneration circuit for a hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3453086U JPH0435601Y2 (en) | 1986-03-12 | 1986-03-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3453086U JPH0435601Y2 (en) | 1986-03-12 | 1986-03-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62147703U true JPS62147703U (en) | 1987-09-18 |
| JPH0435601Y2 JPH0435601Y2 (en) | 1992-08-24 |
Family
ID=30843170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3453086U Expired JPH0435601Y2 (en) | 1986-03-12 | 1986-03-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0435601Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049450A1 (en) * | 1997-04-25 | 1998-11-05 | Komatsu Ltd. | Drive system for hydraulic motors |
| JP2008025706A (en) * | 2006-07-20 | 2008-02-07 | Kobelco Contstruction Machinery Ltd | Hydraulic control circuit for working machine |
-
1986
- 1986-03-12 JP JP3453086U patent/JPH0435601Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998049450A1 (en) * | 1997-04-25 | 1998-11-05 | Komatsu Ltd. | Drive system for hydraulic motors |
| JP2008025706A (en) * | 2006-07-20 | 2008-02-07 | Kobelco Contstruction Machinery Ltd | Hydraulic control circuit for working machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0435601Y2 (en) | 1992-08-24 |
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