Lower rotary and single-motor synchronous lifting type gantry type crane trolley

The invention discloses a lower rotary and single-motor synchronous lifting type gantry type crane trolley. The lower rotary and single-motor synchronous lifting type gantry type crane trolley comprises an upper driving trolley, a lower driving trolley, a rotating mechanism and a synchronous lifting mechanism, the lower driving trolley is rotatably connected with the upper driving trolley throughthe rotating mechanism, and the synchronous lifting mechanism is arranged on the lower driving trolley. According to the lower rotary and single-motor synchronous lifting type gantry type crane trolley, two motors are adopted and arranged in rotary bearings for driving, the motor number is small, few fault points are generated, maintenance is easy, and the efficiency is high; and in addition, thelower driving trolley is small in overall size, low in overall weight, easy to manufacture and machine and low in machine type energy consumption under the same lifting height and lifting weight. Thesynchronous lifting mechani