Air cylinder assembly of air compressor

The utility model provides an air cylinder assembly of an air compressor, and belongs to the technical field of air compressors. The air inlet valve plate solves the technical problems that an existing air inlet valve plate of the air compressor is prone to bending deformation, and a limiting structure is unreasonable in design. According to the air cylinder assembly of the air compressor, the lower portion of a valve plate is fixedly connected with an air inlet limiting plate, the air inlet limiting plate is located on the lower side of an air inlet hole, a gap is formed between the air inlet limiting plate and the lower end of the air inlet hole, and an air inlet valve plate is arranged between the air inlet limiting plate and the air inlet hole and can plug the air inlet hole; a containing groove used for containing the air inlet limiting plate is formed in the upper end of the piston. The air inlet valve plate is excessively bent through the air inlet limiting plate, so that deformation of the air inlet v