Land and air dual-purpose robot

A land and air dual-purpose robot comprises a framework, a power module, a flight module, a land walking module and a control module. The land walking module comprises a front wheel, a rear wheel, a left wheel and a right wheel. Each wheel is provided with a direct-current motor. An output rotary shaft of each direct-current motor is connected with a set of transmission gears, and each wheel is controlled to rotate through engagement of the corresponding transmission gears and gear grooves in the inner wall of a rim of the wheel. The flight module comprises a front propeller, a rear propeller, a left propeller and a right propeller, and each propeller is provided with a model airplane motor and an electron speed regulator. The connecting point of blades of each propeller falls to the circle center of the plane where the corresponding wheel is located, the length of each blade is smaller than the inner radius of each wheel, and the rotating face of the blades is perpendicular to the plane where the correspondi