Double driving lifting mechanism for tower crane

The utility model relates to a double driving lifting mechanism for a tower crane, which comprises a winding drum, a speed reducing motor and a braking device. The utility model is characterized in that rotating shafts (3) arranged on the two ends of the winding drum (1) are respectively connected with a shaft extension (5) of the speed reducing motor by a shaft coupler (4). The other set of the speed reducing motor and the braking device can still supply 50% of the motive power to continue to run the operation, in the event of the failure of one set of the speed reducing motor and the braking device, under the adoption of the utility model. Half of the rated weight is lifted in the 80% of the working condition of the lifting of the common tower crane, and the operation of one set of the speed reducing motor and the braking device can satisfy the requirement of the 80% of the working condition; besides, other power devices are not needed to hoist the fitting parts for the maintenance. The output of the speed reducing motor and the braking device in a small specification is large in an actual demand, the versatility of the product is improved, and the cost is reduced.