Driving and lifting combined control system of dump truck

The utility model discloses a driving and lifting combined control system of a dump truck. The driving and lifting combined control system of the dump truck comprises an explosion-proof solenoid valve, a hand-operated direction valve, a lifting oil cylinder, a gas-controlled switch, an explosive-proof power supply, a selecting gear air cylinder, a selecting gear reversing valve, an air pocket and a selecting gear operating valve, a first pipeline and a second pipeline connected with the oil outlet of an oil hydraulic pump are respectively connected with the oil inlet of the safety valve and the oil inlet of the explosion-proof solenoid valve, an executing port of the explosion-proof solenoid valve is connected with the oil inlet of the hand-operated direction valve, two executing ports of the hand-operated direction valve are respectively connected with the oil inlet and the oil outlet of the lifting oil cylinder, the gas-controlled switch is connected between the electricity receiving end of the explosion-proof solenoid valve and the explosive-proof power supply, the executing port of the selecting gear reversing valve is respectively connected with the gas-controlled port of the gas-controlled switch and the selecting gear air cylinder through a third pipeline and a fourth pipeline, the piston rod of the selecting gear air cylinder is connected with the operation rod of the selecting gear operating valve, the lifting oil cylinder of the dump truck lifted during the driving process is not lifted, so that the dump truck can safely pass through the lower place of underground coal mine as air door.