Core wrapped structure hob

The utility model discloses a core wrapped structure hob which comprises a hob shaft, a hob body, a hob ring and an end cover. A shaft shoulder is arranged at the center of the hob shaft, steps are symmetrically arranged on the two sides of the shaft shoulder, the hob shaft penetrates through the hob body, thrust bearings are arranged on the two sides of the shaft shoulder respectively, and cylindrical roller bearings are arranged between the thrust bearings and the steps. According to the core wrapped structure hob, the cylindrical roller bearings and the thrust bearings are used for replacing bearings in a traditional mode, the radial bearing capability of the hob is increased by increasing the number of cylindrical rollers, the axial bearing capability of the hob is improved through the thrust bearings, the bearing capability of the whole hob is correspondingly improved, the wear resistance of the hob is improved, and the service life of the hob is prolonged.