Research and Design of 8 Track Shape Dolly Based on Gravitational Potential Energy Without Electric Drive

As people pay more attention to environmental protection and energy saving, a kind of environmental protection and energy saving self-propelled trolley without electric drive is designed. The trolley is based on the law of conservation of energy, without any other power, driven by gravitational potential energy of its heavy farmer. Through the design of mechanical mechanism, the trajectory of "8" shape is realized, and the shape of trajectory can be adjusted. The distance of walking depends on the exhaustion of gravitational potential energy. No electric drive self-propelled dolly has the advantages of simple working environment, energy saving and environmental protection. It has a good application prospect in both student competition and children's toys.