Binding-free self-tightening insulator structure

The invention discloses a binding-free self-tightening insulator structure, and relates to the technical field of electrical equipment. A composite umbrella skirt is fixedly arranged on the outer side wall of an insulator cylinder, a wire groove is formed in the top of the insulator cylinder, sliding grooves are symmetrically formed in the two sides of the wire groove, sliding blocks are slidably connected into the sliding grooves, one end of a spring is connected to the sliding blocks, and the other end of the spring is connected to the top of the insulator cylinder. The other ends of the springs are connected to the inner side walls of the sliding grooves, first arc-shaped grooves are formed in the sides, close to each other, of the two sliding blocks, bolt connectors are formed in the tops of the sliding grooves, bolts are fixedly arranged at the bottom of the wire pressing cover, and second arc-shaped grooves are further formed in the bottom of the wire pressing cover. According to the binding-free self-t