JPS6455402A - Shock preventer for hydraulic motor drive circuit having counter balance valve - Google Patents
Shock preventer for hydraulic motor drive circuit having counter balance valveInfo
- Publication number
- JPS6455402A JPS6455402A JP20954487A JP20954487A JPS6455402A JP S6455402 A JPS6455402 A JP S6455402A JP 20954487 A JP20954487 A JP 20954487A JP 20954487 A JP20954487 A JP 20954487A JP S6455402 A JPS6455402 A JP S6455402A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- counter balance
- balance valve
- pressure
- bleed
- 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
- 230000035939 shock Effects 0.000 title abstract 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE:To reduce starting and stopping shock by coupling both main paths through a bleed-off valve which employs hydraulic pressure in main path as pilot pressure. CONSTITUTION:Main paths 1, 2 for communicating a counter balance valve 13 and a changeover valve 5 are coupled through a bleed-off valve 21 which employs hydraulic pressure in the main paths 1, 2 as pilot pressure and supplies pressure oil from feeding side to return side under neutral state. Consequently, upon switching of the changeover valve 5, pressure oil flows from feeding side main path 1 or 2 through the bleed off valve 21 to return,side main path 2 or 1 so as to suppress abrupt pressure rise in the main paths 1, 2 and switch the counter balance valve 13 slowly, thus preventing starting and stopping shock.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20954487A JPS6455402A (en) | 1987-08-24 | 1987-08-24 | Shock preventer for hydraulic motor drive circuit having counter balance valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20954487A JPS6455402A (en) | 1987-08-24 | 1987-08-24 | Shock preventer for hydraulic motor drive circuit having counter balance valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6455402A true JPS6455402A (en) | 1989-03-02 |
Family
ID=16574564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20954487A Pending JPS6455402A (en) | 1987-08-24 | 1987-08-24 | Shock preventer for hydraulic motor drive circuit having counter balance valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6455402A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009281460A (en) * | 2008-05-21 | 2009-12-03 | Bosch Rexroth Corp | Hydraulic closed circuit for rotating work tool |
JP2017145950A (en) * | 2016-02-19 | 2017-08-24 | 日立建機株式会社 | Hydraulic drive device of hydraulic motor and construction vehicle |
-
1987
- 1987-08-24 JP JP20954487A patent/JPS6455402A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009281460A (en) * | 2008-05-21 | 2009-12-03 | Bosch Rexroth Corp | Hydraulic closed circuit for rotating work tool |
JP2017145950A (en) * | 2016-02-19 | 2017-08-24 | 日立建機株式会社 | Hydraulic drive device of hydraulic motor and construction vehicle |
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