Cylinder roller bearer structure on printing machine

The utility model discloses a cylinder roller bearer structure on a printing machine. The cylinder roller bearer structure comprises a plate cylinder, a rubber cylinder and an impression cylinder, wherein the plate cylinder, the rubber cylinder and the impression cylinder are supported by wallboard shaft sleeves, the three cylinders are assembled by cylinder bodies, shaft necks, roller bearers, shaft heads and gears, the roller bearers are in conical shapes, and the roller bearers are in interference fit with the three cylinders. According to the cylinder roller bearer structure on a printing machine disclosed by the utility model, the roller bearers are in the conical shapes, axial regulation amount of the three cylinders can be converted into radial change of a roller bearer on the rubber cylinder relative to a roller bearer on the impression cylinder, better contact of the roller bearers of the rubber cylinder and the impression cylinder can be still kept even the center distance of two cylinders changes,