Ceramic bearing structure

The utility model relates to a ceramic bearing structure, which is formed by grinding and processing the partial surface after sintering or injection molding with ceramic material adopted. The bearing is roughly a hollow pipe body, and the inner surface of the bearing is provided with six parallel axial concave grooves with equal distance, wherein, a section with a certain length at the bottom of three concave grooves close to one end of the bearing is provided with a fastening claw extending convexly inwards. The end parts of the fastening claws are arc column surfaces which are concave inwards, and the arc column surfaces and axle center outer surfaces are positioned on the same column surface and both closely contact the axle center. A section with a certain length of the other three concave grooves with space to the three concave grooves and close to the other end of the bearing is also provided with the fastening claws with the same structure in an inwards convexly extending way. The arc column surfaces of the end parts of the fastening claws respectively contact the axle center outer surfaces with space in a staggered way.