Chassis system of ground mobile robot

The invention discloses a chassis system of a ground mobile robot. The chassis system comprises a chassis body and four suspension devices which are evenly installed on the chassis body at intervals with the angle being 90 degrees. Each suspension device comprises a drive mechanism and drive wheels. Each drive mechanism comprises a transmission shaft which has power output and is sleeved with the corresponding drive wheels. Suspension base bodies are arranged at the bottom of the chassis body. A suspension rocker arm is arranged between each suspension base body and the corresponding drive mechanism. The two ends of each suspension rocker arm are connected with the corresponding suspension base body and the corresponding drive mechanism in a hinged connection manner. The distance between the two hinge joints, on the corresponding suspension base body, of every two suspension rocker arms is equal to the distance between the two hinge joints on the corresponding drive mechanism. An elastic supporting assembly is arranged between the chassis body and one hinge joint of each drive mechanism. Omnidirectional wheels are adopted as the drive wheels. An independent suspension mechanism is adopted for the chassis system of the ground mobile robot, and the stability and the shock resistance of a chassis of the ground mobile robot are effectively increased.