Car roof device and low floor tramcar

Abstract

The invention provides a car roof device and a low floor tramcar. The car roof device comprises a cambered surface sectional material, two planar sectional materials, two car roof edge beams and two car roof end beams, wherein the cross section of the cambered surface sectional material is arc in the width direction, each side edge of the cambered surface sectional material is connected with one side edge of one planar sectional material respectively, the cross sections of the planar sectional materials are trapezoid in the width directions, the other side edge of each planar sectional material is connected with one car roof edge beam, the cross sections of the car roof edge beams are in transversely-arranged T shapes, the side edge of the transverse overhanging portion of each car roof edge beam is connected with the side edge of one planar sectional material, one side face of each car roof end beam is connected with one end where the cambered surface sectional material, the two planar sectional materials and the two car roof edge beams form a whole, and the sectional materials and interiors of the beams are hollow. A car roof is modularized, the cambered surface sectional material is not suffered from direct bearing acting force and is not prone to deformation, rainwater can be easily drained, and the sectional materials and the beams are hollow. The hollow parts of the large sections of the planar sectional materials can be used for allowing cables to penetrate through, the overall weight of the car roof is lightened, the cables can be conveniently arranged, and the requirement for load bearing strength can be met.

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