Driving roller structure for TBM (tunnel boring machine)

The utility model provides a driving roller structure for a TBM (tunnel boring machine). The driving roller structure comprises a first bearing seat and a second bearing seat which are symmetrically arranged, a first bearing is installed in the first bearing seat, a second bearing is installed in the second bearing seat, a rotating shaft is rotationally supported between the first bearing and the second bearing, first shaft sleeves which are arranged in parallel are located and installed on the rotating shaft through a first shaft shoulder, and a spoke disc is located, welded and fixed to the outer portion of the first sleeve through a second shaft shoulder; a roller is fixed outside the spoke disc, and a rubber coating layer is glued on the outer wall of the roller; and a first flat key is mounted on the outward extending section of the rotating shaft in a matched manner. According to the driving roller structure, a combined hollow welding cylinder structure is adopted, the weight of the whole roller is effe