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A platform for research: civil engineering, architecture and urbanism
HYDRAULIC CONTROL SYSTEM IN WORKING MACHINES
Problem: In a hydraulic excavator equipped with a swivel parking brake, the number of components is reduced and the circuit is simplified while the swivel parking brake is released during the operation of the working actuator as well as during the swivel. Solution: A common electromagnetic proportional valve that outputs a pilot pressure to the straight travel valve is shared as a pilot pressure output electromagnetic valve that outputs a pilot pressure to the brake switch valve, and a pilot pressure (second set pressure) necessary for switching the brake switch valve is set to a lower pressure than the pilot pressure (first set pressure) necessary for switching the traveling straight-going valve.
HYDRAULIC CONTROL SYSTEM IN WORKING MACHINES
Problem: In a hydraulic excavator equipped with a swivel parking brake, the number of components is reduced and the circuit is simplified while the swivel parking brake is released during the operation of the working actuator as well as during the swivel. Solution: A common electromagnetic proportional valve that outputs a pilot pressure to the straight travel valve is shared as a pilot pressure output electromagnetic valve that outputs a pilot pressure to the brake switch valve, and a pilot pressure (second set pressure) necessary for switching the brake switch valve is set to a lower pressure than the pilot pressure (first set pressure) necessary for switching the traveling straight-going valve.
HYDRAULIC CONTROL SYSTEM IN WORKING MACHINES
NAKAJIMA HIDEKI (author) / SAKO SHINO (author)
2024-08-22
Patent
Electronic Resource
English
IPC:
E02F
Baggern
,
DREDGING
HYDRAULIC SYSTEM AND HYDRAULIC DISTRIBUTOR FOR ACTUATING WORKING MACHINES
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Hydraulic system and hydraulic distributor for the actuating working machines
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