Heavy lift car structure

The utility model discloses a heavy lift car structure. The elevator comprises a car bottom assembly located at the bottom of a car. The car bottom assembly comprises a car bottom plate. Coamings arearranged on the two sides of the bottom surface of the car bottom plate; a plurality of reinforcing ribs which are distributed in parallel are uniformly arranged between the two coamings; a connectingsupport is arranged on the top faces of every two adjacent reinforcing ribs, a U-shaped groove is formed in the side, facing the car bottom plate, of each reinforcing rib, each U-shaped groove is filled with a balancing weight, the two ends of each balancing weight are connected with the car bottom plate through angle steel, and a base plate is further arranged between the bottom face of each balancing weight and the bottom face of the corresponding U-shaped groove. The elevator has the advantages that the elevator car is good in stability, easy to overhaul and operate and low in cost, the problem of insufficient trac