Anti-loosening bolt and nut assembly structure

An anti-loosening bolt and nut assembly structure, comprising a bolt, two elastic washers and a nut, the bolt including a bolt head and a bolt shank, the two elastic washers being sleeved on the bolt shank, the nut being matched with and screwed to the bolt shank, the two elastic washers being matched with the bolt head and the nut, respectively;

• each of the two elastic washers including an annular body having an opening, a bottom of the annular body being provided with anti-slip teeth, a top of the annular body extending upward to form an anti-loosening ring, the anti-loosening ring having a taper so that an outer inclined surface is formed on an outer side of the anti-loosening ring, the anti-loosening ring being circumferentially provided with a plurality of first unidirectional teeth;
• the bolt head and the nut each including a unidirectional anti-loosening device matched with the first unidirectional teeth of a corresponding one of the elastic washers.