Launching device and small ground robot

The invention relates to the technical field of robots, in particular to a launching device and a small ground robotic.The launching device comprises a bullet storage device, a bullet feeding device and an ejection device, the ejection device comprises a launching cylinder, an elastic assembly and a percussion assembly, one end of the elastic assembly is fixed to the bottom of the launching cylinder, and the other end of the elastic assembly is connected with the percussion assembly; the tooth-missing gear comprises a tooth part and a tooth-missing part which are integrally formed, the radius of the tooth-missing part is smaller than that of a gear base circle of the tooth part, one end of the percussion rod is connected with the elastic assembly, the other end of the percussion rod impacts a bullet during percussion, a tooth-shaped piece is arranged in the middle section of the percussion rod, and the tooth-shaped piece is meshed with the tooth part of the tooth-missing gear; when the tooth-missing gear rota