Mechanical wheel with self-locking hinge structure

The invention discloses a mechanical wheel with a self-locking hinge structure, which comprises an inner rim, an outer rim and a hinge piece hinged between the inner rim and the outer rim, and a hinge locking structure is arranged between the hinge piece and the inner rim and/or the outer rim; the hinge locking structure comprises a double-partition-plate structure and a single-layer-plate structure, and the single-layer-plate structure is embedded in the double-partition-plate structure and hinged to the double-partition-plate structure through a fastening bolt. The ratchet wheel and a locking nut on the fastening bolt are of an integrated structure, and the ratchet wheel abuts against the outer side of the double-partition-plate structure; the pawl is located on one side of the ratchet wheel, and the hook claw end extends into the ratchet wheel; the elastic pressing piece is arranged on one side of the pawl and elastically abuts against the pawl, so that the claw hooking end of the pawl is meshed into the r