JPS5486077A - Actuator brake circuit - Google Patents

Actuator brake circuit

Info

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
Application number
JP15415577A
Other languages
Japanese (ja)
Other versions
JPS5848763B2 (en
Inventor
Hiroshi Murata
Hideaki Yoshimatsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Nabco Ltd
Original Assignee
Kobe Steel Ltd
Nabco Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd, Nabco Ltd filed Critical Kobe Steel Ltd
Priority to JP15415577A priority Critical patent/JPS5848763B2/en
Publication of JPS5486077A publication Critical patent/JPS5486077A/en
Publication of JPS5848763B2 publication Critical patent/JPS5848763B2/en
Expired legal-status Critical Current

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
JP15415577A 1977-12-20 1977-12-20 Actuator brake circuit Expired JPS5848763B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (9)

* Cited by examiner, † Cited by third party
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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