Foldable packaging box assembly for a bearing

A packaging box assembly comprising:

• an outer box (45) comprising a first inner plate (46) including a first end portion and a second end portion, and a second inner plate (48) including a first end portion foldably extending from said second end portion of said first inner plate (46) and a second end portion connected with said first end portion of said first inner plate (46);
• an inner box (41) received in said outer box (45) and comprising:
• a bottom plate (413) including a first side and a second side;
• a first inner plate (411) including a first end portion foldably extending from said first side of said bottom plate (413) and a second end portion;
• a first cover (44) foldably extending from said second end portion of said first inner plate (411) and defining a first elongate slot (441);
• a second inner plate (412) including a first end portion foldably extending from said second side of said bottom plate (413) and a second end portion;
• and
• a second cover (43) foldably extending from said second end portion of said second inner plate (412) and defining a second elongate slot (431) aligning with said first elongate slot (441);
• a receiving barrel (20) detachably received in a space defined between said first inner plate (411) and said second inner plate (412);
• and
• a suspension ring (22) pivotally mounted on a top portion of said receiving barrel (20) and extending through said first elongate slot (441) and said second elongate slot (431).