Looseness-free adapter fastening structure

The utility model discloses a captive adapter fastening structure, which belongs to the field of structural mechanics, and comprises a fastening screw, an adapter and an adapter cushion block, the captive adapter fastening structure can be formed after matching connection by utilizing the corresponding design of the structural form of each component, the connection between a product support lug and a support table top is reliably realized, and the reliability of the product is improved. And when the product needs to be moved, the reliable connection of each part of the loose and non-loose switching fastening structure on the product support lug is realized. The non-loosening switching fastening structure is simple in structure and convenient to combine, the product supporting lugs can be quickly disassembled and assembled on the support table top, it is ensured that the switching fastening structure is reliably connected to the product supporting lugs in the product carrying process, the switching fastening s