JPS5659003A - Oil pressure controller - Google Patents
Oil pressure controllerInfo
- Publication number
- JPS5659003A JPS5659003A JP13656879A JP13656879A JPS5659003A JP S5659003 A JPS5659003 A JP S5659003A JP 13656879 A JP13656879 A JP 13656879A JP 13656879 A JP13656879 A JP 13656879A JP S5659003 A JPS5659003 A JP S5659003A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- relief valve
- pressure
- inertial body
- change
- 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
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To enable shockless acceleration and reduce an impact at braking, by enabling control to increase accelerating pressure and the discharge quantity of a pump at the acceleration of an inertial body in a machine which drives the inertial body such as a power shovel.
CONSTITUTION: A crossover relief valve 16 is connected between an oil pressure operated change-over valve 13 and a hydraulic pump 14 coupled with an inertial body 15. A counterbalance valve 19 for setting the pump discharge pressure of a passage 18 at a pilot pressure level and a relief valve 20 whose set pressure is lower than that of the former relief valve 16 are connected in parallel with each other between the change-over valve 13 and a tank 17. The downstream side of the relief valve 20 is connected to that of the valve 19 through a check valve 21, the upstream side of which is connected halfway between a pair of opposed check valves 22, 22 in a communication passage 25 which connects passages 23, 24 at both the sides of the motor 14 to each other. Throttle valves 31, 32 having check valves are provided in the pilot passages of the change-over valve 13, whereby delaying the time required to return to its neutral position.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13656879A JPS5659003A (en) | 1979-10-22 | 1979-10-22 | Oil pressure controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13656879A JPS5659003A (en) | 1979-10-22 | 1979-10-22 | Oil pressure controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5659003A true JPS5659003A (en) | 1981-05-22 |
Family
ID=15178288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13656879A Pending JPS5659003A (en) | 1979-10-22 | 1979-10-22 | Oil pressure controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5659003A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6120901U (en) * | 1984-07-12 | 1986-02-06 | 住友重機械工業株式会社 | Pump control circuit for cranes, etc. |
| US5249421A (en) * | 1992-01-13 | 1993-10-05 | Caterpillar Inc. | Hydraulic control apparatus with mode selection |
| US5720168A (en) * | 1994-02-26 | 1998-02-24 | Mannesmann Rexroth Gmbh | Control device for a hydraulic pump |
| US5743089A (en) * | 1996-07-25 | 1998-04-28 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic control system |
| JP2018112304A (en) * | 2017-03-13 | 2018-07-19 | 川崎重工業株式会社 | Hydraulic drive system of construction machine |
| US11280066B2 (en) | 2018-05-21 | 2022-03-22 | Kawasaki Jukogyo Kabushiki Kaisha | Hydraulic drive system of construction machine |
-
1979
- 1979-10-22 JP JP13656879A patent/JPS5659003A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6120901U (en) * | 1984-07-12 | 1986-02-06 | 住友重機械工業株式会社 | Pump control circuit for cranes, etc. |
| US5249421A (en) * | 1992-01-13 | 1993-10-05 | Caterpillar Inc. | Hydraulic control apparatus with mode selection |
| US5720168A (en) * | 1994-02-26 | 1998-02-24 | Mannesmann Rexroth Gmbh | Control device for a hydraulic pump |
| US5743089A (en) * | 1996-07-25 | 1998-04-28 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic control system |
| JP2018112304A (en) * | 2017-03-13 | 2018-07-19 | 川崎重工業株式会社 | Hydraulic drive system of construction machine |
| US11280066B2 (en) | 2018-05-21 | 2022-03-22 | Kawasaki Jukogyo Kabushiki Kaisha | Hydraulic drive system of construction machine |
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