Rear support quick-changing structure of electric trolley

A rear support quick-change structure of an electric trolley comprises a rear support beam and a rear support assembly, a quick-change assembly is arranged between the rear support beam and the rear support assembly, the quick-change assembly comprises a fixing sleeve fixed on the rear support beam and a fixing pin shaft fixed on the rear support assembly, the fixing pin shaft is sleeved with the fixing sleeve, and the fixing sleeve is sleeved with the fixing pin shaft. And a positioning piece is arranged between the fixed sleeve and the fixed pin shaft. When the electric trolley is used, if carried goods are heavy, the universal wheels can be installed on the rear supporting beam for transportation, and the labor-saving effect is achieved; when road conditions such as a sloping field and a narrow road which are not suitable for three-wheel transportation are met, a parking rod can be installed on the rear supporting beam to carry out single-wheel transportation. 一种电动手推车的后支撑快换结构，包括后支撑梁和后支撑组件，后支撑梁和后支撑组件之间设有快换组