Handcart, also known as flat handcart, is a kind of flat transportation equipment. The convenience and practicality of working on a small scale are applicable to small and temporary short distance transportation in most cases. It is one of the common handling equipment in factories, warehouses and supermarkets. It has the characteristics of simple structure, light weight, convenient and quick. According to different structure and performance, trolleys can be divided into ordinary trolleys, silent trolleys, equipment trolleys, station trolleys, etc.