Title:
HYDRAULIC CIRCUIT
Document Type and Number:
Japanese Patent JPS5989804
Kind Code:
A
Abstract:
PURPOSE:To simplify operation and reduce the cost of a hydraulic circuit by interlocking the first and second hydraulic cylinders at a specified interlocking ratio. CONSTITUTION:The second direction changing valve V2 is located at a neutral position, and the first direction changing valve V1' is switched from the neutral position to A port. Whereupon, pressurized oil from the first hydraulic pump P1 is supplied to the first oil chamber R1', and oil in the second oil chamber R2' is returned to an oil tank T, so that the first sliding rod and the second sliding rod are expanded to increase the capacity of the third oil chamber R3'. simultaneously, pressurized oil from the first hydraulic pump P1 is supplied to the second oil chamber R2, and oil in the first oil chamber R1 is sent to the third oil chamber R3', so that a rod of the second hydraulic cylinder C2 is contracted. Subsequently, when the first direction changing valve V1' is switched to B port, the first sliding rod and the second sliding rod are contracted, so that the rod of the second hydraulic cylinder C2 is expanded. Thus, the first hydraulic cylinder C1 and the second hydraulic cylinder C2 are interlocked at a specified interlocking ratio.
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Inventors:
MORISHITA MITSUMASA
Application Number:
JP19898982A
Publication Date:
May 24, 1984
Filing Date:
November 15, 1982
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
F15B11/17; F15B11/08; (IPC1-7): F15B11/08
Attorney, Agent or Firm:
Masami Akimoto
Previous Patent: A component-mounting machine and a component mounting method
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