JPS55142104A - Revolving hydraulic circuit - Google Patents

Revolving hydraulic circuit

Info

Publication number
JPS55142104A
JPS55142104A JP4897779A JP4897779A JPS55142104A JP S55142104 A JPS55142104 A JP S55142104A JP 4897779 A JP4897779 A JP 4897779A JP 4897779 A JP4897779 A JP 4897779A JP S55142104 A JPS55142104 A JP S55142104A
Authority
JP
Japan
Prior art keywords
brake
valve
hydraulic
comes
work
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
Application number
JP4897779A
Other languages
Japanese (ja)
Inventor
Shuichi Ichiyama
Yasuhiko Murata
Yukio Aoyanagi
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP4897779A priority Critical patent/JPS55142104A/en
Publication of JPS55142104A publication Critical patent/JPS55142104A/en
Pending legal-status Critical Current

Links

Landscapes

  • Jib Cranes (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To prevent abnormal wear of parts by providing with a direction converting valve for braking and by releasing a stop brake gear so that a stop brake does not work in case where rotational speed of a hydraulic motor is more than a settled valve.
CONSTITUTION: A relief valve 18 is connected to an oil pressure source 17 for driving a brake hydraulic cylinder 11 for a brake 10, a direction change-over valve 19 for a hydraulic pilot operating brake is installed between the pressure source 17 and a cylinder 11. If the moment of inertia for a revolving body revolved by a hydraulic motor 3 is large, even though a direction converting valve 4 is returned to the neutral position, the valve 19 is stayed at the position (b), and the brake 10 does not work. When rotation of a motor 3 comes to be less than a settled value, pressure in a pipeline 23 or 24 drops and as the valve 19 comes to be at the position (a) the brake 10 works.
COPYRIGHT: (C)1980,JPO&Japio
JP4897779A 1979-04-23 1979-04-23 Revolving hydraulic circuit Pending JPS55142104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4897779A JPS55142104A (en) 1979-04-23 1979-04-23 Revolving hydraulic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4897779A JPS55142104A (en) 1979-04-23 1979-04-23 Revolving hydraulic circuit

Publications (1)

Publication Number Publication Date
JPS55142104A true JPS55142104A (en) 1980-11-06

Family

ID=12818308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4897779A Pending JPS55142104A (en) 1979-04-23 1979-04-23 Revolving hydraulic circuit

Country Status (1)

Country Link
JP (1) JPS55142104A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01174601U (en) * 1988-05-30 1989-12-12
KR100590788B1 (en) * 2003-12-26 2006-06-21 한국항공우주연구원 Overload prevention device for aircraft structural test

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01174601U (en) * 1988-05-30 1989-12-12
KR100590788B1 (en) * 2003-12-26 2006-06-21 한국항공우주연구원 Overload prevention device for aircraft structural test

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