Hydraulic control device for construction machinery

A hydraulic control device of construction machinery is disclosed. The device includes a main merging/diverging valve, operating levers operated to actuate plural actuators, an operating condition judging section, and a pattern collating section. When a load pressure of each actuator is high, a disc...

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Bibliographic Details
Main Authors YOSHIAKI ITAKURA, MASAHIKO HOSHIYA, YUKI YOKOYAMA, JUNSEI TANAKA
Format Patent
LanguageEnglish
Published 27.01.2010
Subjects
BLASTING
DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
DREDGING
FIXED CONSTRUCTIONS
FLUID-PRESSURE ACTUATORS
FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS
FOUNDATIONS
HEATING
HYDRAULIC ENGINEERING
HYDRAULICS OR PNEUMATICS IN GENERAL
LIGHTING
MECHANICAL ENGINEERING
SOIL SHIFTING
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
WEAPONS
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Summary:A hydraulic control device of construction machinery is disclosed. The device includes a main merging/diverging valve, operating levers operated to actuate plural actuators, an operating condition judging section, and a pattern collating section. When a load pressure of each actuator is high, a discharge pressure of each discharge oil path is also high, and when a total of the discharge pressures exceeds a predetermined set pressure, the main merging/diverging valve is switched to a diverging position, and when the total of the discharge pressures drops to below the set pressure, the main merging/diverging valve is switched to the merging position.
Bibliography:Application Number: GB20070023805