Expansion bolts is used for fixed bridge steel frame

The utility model provides an expansion bolts is used for fixed bridge steel frame, includes drum piece and branch tablet, the inside of drum piece is hollow structure, and the one end of drum piece is equipped with the multiunit fixed axle, the branch tablet includes multiplely, and every group the one end of branch tablet is equipped with two sets of dead levers, and is two sets of it puts the interval to form the cover between the dead lever, the fixed axle inserts the interval is put to the cover, be equipped with the round pin shaft hole in fixed axle and the dead lever, just a set of round pin axle is inserted to the inside in round pin shaft hole, the both ends of round pin axle are equipped with protruding structure, a set of gag lever post is inserted to the inside of drum piece, be equipped with the external screw thread on the body of rod of gag lever post, the gag lever post is through a set of nut of threaded connection on the body of rod of the one end that lies in the drum piece. Steelframe and