Self-undercut anchor bolt

• Main Authors: DONG SHUAI, FAN YAFENG, JIA YUNLONG, YUAN FANG, LI QI, ZHANG YUHAO, ZUO SHIBIN, ZHANG QIN
• Format: Patent
• Language: Chinese; English
• Published: 19.07.2024
• Subjects: BLASTING; 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; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

The self-undercut type anchor bolt is composed of a conical head anchor rod, a sleeve, a gasket and a nut, the anchor rod is sequentially sleeved with the sleeve, the gasket and the nut, the bottom of the anchor rod is conical or horn-shaped, the middle of the anchor rod is an unthreaded section, and the top of the anchor rod is a threaded section; a clamping groove matched with a mounting tool is formed in the top end of the sleeve, and a bottom cutting tool bit is arranged at the bottom end of the sleeve; a sleeve falling prevention structure is arranged in the clamping groove, the inner pipe wall of the clamping groove is locally stamped, convex points are formed on the outer wall and the inner wall of the sleeve in the clamping groove, and the inner diameter of the sleeve at the convex points is smaller than the diameter of a threaded section of the conical head anchor rod and larger than the diameter of an unthreaded section; the bottom cutting tool bit is evenly divided into 2-8 blades through 2-8 paral