Carrier tray system

The invention discloses a bearing disc system which comprises a positioning machine box assembly, a material conveying plate assembly installed on the positioning machine box assembly and an air guide clamping block installed on the material conveying plate assembly and used for bearing a transformer, and a linkage assembly is installed below the material conveying plate assembly. A conveying channel used for conveying the transformer is arranged under the positioning case assembly, internal airflow is driven by corresponding pistons to push positioning type clamping push blocks to move towards the surface of the transformer along air guide channel blocks, the two sides of the transformer are gradually clamped, and then the transformer is rapidly conveyed. When the corresponding pistons move upwards, due to pushing of air pressure, the positioning type clamping push blocks release the transformer, so that the transformer is rapidly and stably clamped, meanwhile, the transformers of different sizes can be clam