| 摘要 |
PURPOSE: To simplify design by driving a pump driving electric motor by generating an alternating current, actuating variable displacement hydraulic pumps, and controlling crane operation through hydraulic motors by controlling a delivery oil quantity in the crane for transport container cargo handling work. CONSTITUTION: AC output of a generator 38 is supplied to traveling duplex hydraulic control systems 42a, 42b and a hoisting hydraulic control system 44 to drive respective electric motor starters 60a, 60b, 50. Then, respective variable displacement hydraulic pumps 64a, 64b, 54, 58 are operated. Respective variable displacement hydraulic motors 66a, 66b, 56, 59 are driven thereby. Left/right roller chain type final driving systems 68a, 68b, a hoising drum 22, a bridge traversing mechanism are controlled in driving by these respective hydraulic motors. By this constitution, design is simplified, reliability is improved, and maintenance is facilitated. |
