Double-insurance locking type expansion anchor bolt

Abstract

The utility model relates to the technical field of anchor bolt fasteners, and discloses a double-insurance locking type expansion anchor bolt which comprises an anchor rod assembly, a nut is arranged on the outer side of the anchor rod assembly, a gasket is arranged below the nut, a gasket is arranged at the lower end of the gasket, and a sleeve assembly and an expansion sleeve assembly are connected to the outer side of the anchor rod assembly in a sleeved mode. According to the double-insurance locking type expansion anchor bolt, the expansion sleeve assembly is arranged, the expansion sleeve assembly is provided with the upper expansion joint and the lower expansion joint, the upper portion and the lower portion of the expansion sleeve assembly can anchor a wall structure when the expansion sleeve assembly is fixed through the two expansion joints, the anchoring force is high, the contact area between the expansion sleeve assembly and surrounding materials is increased, the expansion sleeve assembly can make close contact with the surrounding materials better, and the expansion effect is good. The sleeve body is provided with the annular groove, so that the sleeve body can be better embedded in surrounding materials, the anchor bolt can be more easily installed at a preset position, and meanwhile the anchor bolt can be more easily maintained or dismantled when needed.

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