Novel waterproof expansion carriage device

The novel waterproof expansion carriage device comprises a top plate and side plates, arc-shaped lugs are arranged at the two ends of the top plate, threaded holes are formed in one sides of the arc-shaped lugs, the inner surfaces of the threaded holes are in threaded connection with connecting bolts, and expansion joint rubber pieces are arranged between the top plate and the upper ends of the side plates. The expansion joint film comprises an outer bonding layer, an outer waterproof layer, a base material layer, an inner waterproof layer and an inner bonding layer, and the base material layer comprises an elastic rubber layer and a metal fiber layer. Through the effects of the expansion joint film, the threaded hole, the arc-shaped lug, the connecting bolt, the outer bonding layer, the outer waterproof layer, the base material layer, the elastic rubber layer, the metal fiber layer, the inner waterproof layer and the inner bonding layer, the problems that an existing carriage inevitably vibrates in the movin