Cold-state hoisting structure for ring part heat treatment process

The utility model discloses a cold-state hoisting structure for a ring part heat treatment process. A lug boss is arranged at one end of a central shaft assembly; the movable sleeve is hollowly sleeved on the central shaft assembly; the upper connecting assembly and the middle connecting assembly are fixed to the peripheral face of the movable sleeve, and the center shaft assembly penetrates through the lower connecting assembly. One end of each first swing arm is movably connected with the upper connecting assembly; one end of each second swing arm is movably connected with the middle connecting assembly; one end of each third swing arm is movably connected with the lower connecting assembly; one end of each piece grabbing rod is movably connected with the other end of one first swing arm, and after the other ends of the second swing arms and the third swing arms are jointly movably connected with the other end of one piece grabbing rod, the piece grabbing rods are parallel to the center shaft assembly. The