(EN) The invention provides a self-drilling expansion anchor bolt. The self-drilling expansion anchor bolt comprises a drill bit used for drilling, an anchor rod connected with the drill bit and an expansion sleeve arranged on the anchor rod in a sleeving mode, an expansion cone is arranged at the first end, adjacent to the drill bit, of the anchor rod, and a neck area is continuously arranged behind the expansion cone. The second end, away from the drill bit, of the neck area is provided with a threaded section, when the expansion cone is pulled into the expansion sleeve, the expansion cone expands the expansion sleeve in the radial direction, a transition part is arranged between the drill bit and the expansion cone of the anchor rod, and the maximum diameter of the transition part is smaller than the hole diameter of a drill hole formed by the drill bit. In the anchoring process, good friction fit is formed among the expansion sleeve, the hole wall and the transition part, so that the anchoring effect of the self-drilling anchor bolt is greatly improved.
(ZH) 本发明提供一种自钻孔膨胀锚栓，包括用于钻孔的钻头，与钻头相连接的锚杆，以及套装于所述锚杆上的膨胀套筒，所述锚杆在邻接所述钻头的第一端具有膨胀锥，在膨胀锥后方连续的有颈部区域，并且在颈部区域远离所述钻头的第二端具有螺纹节段，当所述膨胀锥被拉入所述膨胀套筒中时，该膨胀锥沿径向扩张所述膨胀套筒，所述钻头和所述锚杆的膨胀锥之间设有过渡部，该过渡部的最大直径小于所述钻头形成的钻孔的孔径。在锚固过程中，膨胀套筒和孔壁以及过渡部之间形成了良好的摩擦贴合，使自钻孔锚栓的锚固效果大大的提高。
