EMERGENCY HYDRAULIC SYSTEM AND EMERGENCY DRIVING SYSTEM USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an emergency hydraulic system having improved operability and an emergency driving system having superior operability through the emergency hydraulic system and a normal driving system.SOLUTION: An emergency driving system is constituted by connecting a hydraulic source constituted by a hydraulic pump provided with a supplying circuit connected to a tank; a direction changing-over valve having a discharging circuit connected to a discharging side of the hydraulic source and a discharging circuit connected to the tank that are connected at one side and connecting an emergency supplying and discharging circuit connected to the hydraulic cylinder to the other side; a discharging circuit connected to a discharging side of the hydraulic source and an exhaust circuit connected to the tank are connected to one side and a direction changing-over valve having an emergency supplying and discharging circuit connected a hydraulic cylinder is connected to the other side, a hydraulic cylinder coupler arranged at the extremity end of the emergency supplying and discharging circuit; a supplying circuit connecting the emergency supplying and discharging circuit of the emergency hydraulic device to the normal driving device and the supplying circuit connected to the hydraulic source and the discharging circuit connected to the direction changing-over valve are connected to the tank of the normal driving device.