Double-nut bolt assembly with good stability

The high-stability double-nut bolt assembly comprises a first nut, a screw head and a second nut, the bottom end of a supporting rod is fixedly connected with the inner bottom face of the screw head, the bottom face of an outer threaded cylinder is fixedly connected with a rubber ring, a threaded rod is attached to the top face of a disc, and the bottom end of the threaded rod penetrates through the disc, penetrates into the screw head and is fixedly connected with a first gear. The bottom face of a first gear is attached to the inner bottom face of a screw head, a threaded rod is rotationally connected with a disc, a second vertical rod is made of an alloy steel material, the disc and a barrel are connected in a welded mode, the wall thickness of a second T-shaped sliding rod ranges from 4 mm to 6 mm, and the threaded rod and a second nut can be connected and fixed while an outer threaded barrel and a first nut are connected and fixed; meanwhile, mutual locking operation is achieved, the stability of connect