Expansion anchor bolt

• Main Author: LIU TIANXING
• Format: Patent
• Language: Chinese; English
• Published: 06.08.2008
• Subjects: BLASTING; BUILDING; CEILINGS; DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING; ENGINEERING ELEMENTS AND UNITS; FIXED CONSTRUCTIONS; FLOORS; GENERAL BUILDING CONSTRUCTIONS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSULATION OR OTHER PROTECTION OF BUILDINGS; LIGHTING; MECHANICAL ENGINEERING; ROOFS; THERMAL INSULATION IN GENERAL; WALLS, e.g. PARTITIONS; WEAPONS

An expansion anchor comprises an anchor bolt rod, and further comprises at least one expansion sleeve whose two ends are provided with expansion portions, and are arranged on the anchor bolt rod, and at least one fixed sleeve. The expansion portions are formed by cutting several joint-cuttings in the axial direction on the end portion of the expansion sleeve, an extrusion portion which is used to support the expansion portion is formed on the end portion of the fixed sleeve, the fixed sleeve in the inner end portion of the anchor bolt rod is matched with the anchor bolt rod through threads, and a clamping element which is used to clamp all expansion sleeves and the fixed sleeve between the anchor bolt rod and the fixed sleeve is arranged on the external end portion of the anchor bolt rod with the fixed sleeve in the internal end portion. The expansion anchor has the advantages that the contact area of effect contact force between the expansion anchor bolt and building is largely increased through several the