Thread self-locking combined anchor bolt

Abstract

The invention discloses a thread self-locking combined anchor bolt. The thread self-locking combined anchor bolt comprises an inner rod and an outer rod; a rod body of the inner rod is provided with an outer screw thread section, and a countersunk head is disposed at the inner end of the inner rod; an inner threaded hole is formed in a rod body of the outer rod; the countersunk head is an eccentric countersunk head or a center countersunk head or a combined countersunk head of which the center part and the eccentric part are combined; the outer rod and the inner rod are made to be in threaded connection by operating the spiral part of the outer end of the outer rod, so that the eccentric countersunk head is embedded into a to-be-anchored anchor hole for locking, or the center countersunk head cooperates with an expanding part between the inner ends of the outer rod to cause expansion and to be embedded into the to-be-anchored anchor hole, or the center part of the combined countersunk head cooperates with the expanding part between the inner ends of the outer rod to cause expansion and to be embedded into the to-be-anchored anchor hole, and the eccentric part of the combined countersunk head is embedded into the to-be-anchored anchor hole for double locking; accordingly, the anchoring function is achieved, actual effect cannot be achieved even after repeatedly dismantling, the service life is longer, and the safety performance is higher.

Description

technical field [0001] The invention relates to an anchoring technology, in particular to a threaded self-locking combined anchor bolt. Background technique [0002] At present, percussion anchor bolts are commonly used in construction in the field of building decoration, which are usually composed of screw rods, expansion rings, extruded steel sleeves, gaskets and nuts. On the screw, the expansion ring can expand into a wedge shape on the expansion end of the screw, and then insert the expansion end of the screw, the expansion ring and the extrusion cylinder liner into the preset installation hole on the back of the stone plate, and then use the external sleeve And the hammer is knocked, and the expansion ring is stretched by the expansion end of the screw, so that the expansion end of the screw is consolidated with the bottom of the matching installation hole, and the cylindrical extruded cylinder liner is placed in the cylindrical hole. Like this, gasket and nut are inst...

AI Technical Summary

Problems solved by technology

In actual use, it often occurs that the expansion ring and the extrusion cylinder liner are not tightly matched with the screw, which leads to the phenomenon that the anchor bolt is not locked tightly due to sliding, or the anchor bolt is easy to loose after multiple disassembly, resulting in The security of the anchor is compromised

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