Combined abrasionproof decreases coupling of socket joint formula

The utility model discloses a combined abrasionproof decreases coupling of socket joint formula, including socket 7 and bellmouth 8, the socket inserts in the bellmouth, it presses blue 3 to be equipped with on the socket 7, press bluely through bolt 2 and nut 1 and bellmouth edge fixed connection, be equipped with the embedded groove on the internal surface of bellmouth, the embedding has rubber ring 4, cage ring 5 and bracing ring 6 in the embedded groove, rubber ring and bracing ring are put together and are formed interference fit with the socket that inserts bellmouth part. The beneficial effects of the utility model are that, simple structure, simple to operate, the leakproofness is good