JPS5486077A - Actuator brake circuit - Google Patents
Actuator brake circuitInfo
- Publication number
- JPS5486077A JPS5486077A JP15415577A JP15415577A JPS5486077A JP S5486077 A JPS5486077 A JP S5486077A JP 15415577 A JP15415577 A JP 15415577A JP 15415577 A JP15415577 A JP 15415577A JP S5486077 A JPS5486077 A JP S5486077A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- releaf
- brake circuit
- switch valve
- 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
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To brake smoothly at deceleration or stop by providing a pressure control system in a brake circuit, which has the over-ride characteristic.
CONSTITUTION: Releaf valves R1, R'1 with each setting pressure 140kg/cm2 and releaf valves R2, R'2 with setting pressure 70kg/cm2 are incorporated in a brake circuit I. The switch valve 2 of a switch valve unit II is turned to the normal position b or to the reverse position c to run a hydraulic motor 6 and turn a swinging boom. Then the switch valve 2 is turned to the neutral position a, resulting oil in a feed-drain pipe 4 or 5 rises in pressure abruptly. When the pressure increases over 70kg/cm2 the releaf valve R2 or R'2 opens and when the pressure comes near 140kg/cm2, the releaf valve R1 or R'1 starts to allow release of oil pressure in the feed-drain pipe 4 or 5 into a pipe 20. The inertial force of the boom makes energy reduce and braking damp and then the hydraulic motor 6 stops.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15415577A JPS5848763B2 (en) | 1977-12-20 | 1977-12-20 | Actuator brake circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15415577A JPS5848763B2 (en) | 1977-12-20 | 1977-12-20 | Actuator brake circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5486077A true JPS5486077A (en) | 1979-07-09 |
JPS5848763B2 JPS5848763B2 (en) | 1983-10-31 |
Family
ID=15578037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15415577A Expired JPS5848763B2 (en) | 1977-12-20 | 1977-12-20 | Actuator brake circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5848763B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5737104A (en) * | 1980-08-09 | 1982-03-01 | Nippon Air Brake Co Ltd | Brake circuit for actuator |
JPS57134402U (en) * | 1981-02-17 | 1982-08-21 | ||
JPS57184704A (en) * | 1981-05-08 | 1982-11-13 | Nippon Air Brake Co Ltd | Driving circuit for actuator |
JPS58156701A (en) * | 1982-03-09 | 1983-09-17 | Nippon Air Brake Co Ltd | Circuit for driving actuator |
CN103122894A (en) * | 2012-10-26 | 2013-05-29 | 中联重科股份有限公司 | Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment |
US20160032946A1 (en) * | 2014-07-30 | 2016-02-04 | Danfoss Power Solutions Gmbh & Co. Ohg | Rotational speed limitation device for a motor |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH042725A (en) * | 1990-04-20 | 1992-01-07 | Fuji Denshi Kogyo Kk | Method and apparatus for quenching ball screw with non-oxidizing high frequency |
JPH0649530A (en) * | 1992-08-04 | 1994-02-22 | Fuji Denshi Kogyo Kk | High-frequency hardening method and device for shaft |
-
1977
- 1977-12-20 JP JP15415577A patent/JPS5848763B2/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5737104A (en) * | 1980-08-09 | 1982-03-01 | Nippon Air Brake Co Ltd | Brake circuit for actuator |
JPH0226081B2 (en) * | 1980-08-09 | 1990-06-07 | Nippon Air Brake Co | |
JPS57134402U (en) * | 1981-02-17 | 1982-08-21 | ||
JPS57184704A (en) * | 1981-05-08 | 1982-11-13 | Nippon Air Brake Co Ltd | Driving circuit for actuator |
JPH0155321B2 (en) * | 1981-05-08 | 1989-11-24 | Nippon Eyaabureeki Kk | |
JPS58156701A (en) * | 1982-03-09 | 1983-09-17 | Nippon Air Brake Co Ltd | Circuit for driving actuator |
JPH0241642B2 (en) * | 1982-03-09 | 1990-09-18 | ||
CN103122894A (en) * | 2012-10-26 | 2013-05-29 | 中联重科股份有限公司 | Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment |
US20160032946A1 (en) * | 2014-07-30 | 2016-02-04 | Danfoss Power Solutions Gmbh & Co. Ohg | Rotational speed limitation device for a motor |
Also Published As
Publication number | Publication date |
---|---|
JPS5848763B2 (en) | 1983-10-31 |
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