Mounting and dismounting nut structure

A mounting and dismounting nut structure configured to be screwed to a threaded rod, comprising:

• a first body comprising a first inclined surface,
• a second body configured to move relative to the first body and comprising a through hole and drive blocks,
• a plurality of threaded blocks, and
• a limiting member, wherein:
• inner walls of the plurality of threaded blocks comprise internal threads,
• outer walls of the plurality of threaded blocks comprise second inclined surfaces, and
• when the mounting and dismounting nut structure surrounds the threaded rod and is subjected to an external force from a top of the first body:
• the plurality of threaded blocks move toward a center axis of the plurality of threaded blocks due to a cooperation of the first inclined surface and the second inclined surfaces, and
• after the second body rotates relative to the first body to drive the drive blocks to move toward a top of the limiting member, the limiting member is configured to be self-sustainingly positioned relative to the first body for providing axial support to the plurality of threaded blocks to be locked with the threaded rod.