U shaped riveted joint and riveting gun joint

The invention discloses a U-shaped rivet joint, which is characterized in that the rivet joint takes a shape of an inverted U-shaped structure, a bayonet is arranged downwards, the lower end of the tail of the rivet joint is provided with a connecting hole, and the side wall which is axially opposite to the connecting hole is provided with a screwed hole. The invention also discloses a connector used for connecting the U-shaped rivet joint and a rivetter, which is characterized in that the connector takes a shape of a column-table structure, the head of the connector is a column which is provided with a key slot and in transition fit with the connecting hole on the U-shaped rivet joint in a transition way, the tail of the connector is a round table which has one concave station respectively at the left side and the right side which are matched with two bosses at the tail of the U-shaped rivet joint, and the radial center of the round table is provided with a screwed hole. As the bayonet of the U-shaped rivet joint can escape from the non-open part, the riveting of the non-open part can be realized; the U-shaped rivet joint and the connector adopt the transition fit connection, as the two can move relatively, the rebound problem of the rivet joint can be solved.