Renewable energy source recovering device for tire cantilever crane

The utility model provides a renewable energy source recovering device for a tire cantilever crane, wherein a full bridge type charging/discharging convertor is connected with a super capacitor module, an internal combustion engine generator set, a direct-current motor/electric generator, a DC/DC (direct current) module and a controlling and driving circuit; the renewable energy source recovering device is provided with a segmented analog voltage detecting circuit for detecting the voltage of the super capacitor module and the direct-current motor/electric generator respectively and transmitting to an ARM processor; control input and an upper computer are in monitoring connection with the ARM processor, and an ARM output end is connected with the controlling and driving circuit; and when a heavy object declines, the motor is converted into the electric generator, and the potential energy-converted electric power is stored in the super capacitor module by the charging/discharging convertor, and when the heavy