US Patent 9493047 Amphibious unicycle

An amphibious unicycle, comprising an annular casing having an accommodation cavity; two sides of the annular casing are respectively provided with openings communicating with the accommodation cavity; the openings are provided with doors for closing the openings; the doors are rotatably connected to the annular casing; the two sides of the annular casing are respectively provided with annularly arranged external rotor motors; the external rotors of the external rotor motors are provided with a plurality of drainage holes therein arranged along the circumference of the external rotors; the accommodation cavity is provided with a power system for driving the unicycle to operate.