Porcelain insulator with automatic fastening mechanism

The utility model discloses a porcelain insulator with an automatic fastening mechanism, which relates to the technical field of porcelain insulators, and comprises a porcelain piece, a protruding part is arranged on the porcelain piece, a metal cap is glued on the protruding part, a metal pin is glued at the bottom of the porcelain piece, a clamping groove is integrally formed on the metal cap, and the clamping groove is provided with an automatic fastening mechanism. A square groove is formed in the bottom of the clamping groove, a sliding column is arranged in the square groove in a sliding mode, a spring is arranged in the square groove, one end of the spring is fixedly connected to the sliding column, the other end of the spring is fixedly connected to the inner wall of the square groove, a clamping block is fixedly connected to the top of the sliding column, and the two ends of the clamping block are arc-shaped faces. According to the porcelain insulator with the automatic fastening mechanism, by arrang