Motor-driven balance crane

The utility model discloses a motor-driven balance crane which mainly comprises a balance arm mechanism, a transmission case lifting device, a motor reduction gearbox, a swing mechanism and an electric control case. An electric control case button box is hung at the front end of a front suspension arm by adopting a flexible cable, a limit stop is additionally installed at the position of a lifting hook pulley of the transmission case lifting device, a first-grade planetary reduction mechanism is adopted as a reducer, a thrust bearing and a surface bearing are additionally installed at the upper end and the lower end of the swing mechanism, and a limit stop and a limit switch are installed at the limiting position of the swing mechanism. A pulling arm is additionally arranged at the front end of the front suspension arm, a soft belt type wire is adopted, and the workpieces are conveniently pulled to move on a same plane in a rotatable mode in a lifting. The motor-driven balance crane is mainly applied to manuf