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    • 1. 发明授权
    • Self-drilling screw
    • 自钻螺丝
    • US6142719A
    • 2000-11-07
    • US281253
    • 1999-03-30
    • Gerd DaubingerHorst RahmsmdorfFelix FerlemannSven JochmannDaniel E. Spielberg
    • Gerd DaubingerHorst RahmsmdorfFelix FerlemannSven JochmannDaniel E. Spielberg
    • F16B25/10F16B25/00
    • F16B25/0084F16B25/0021F16B25/103
    • A self-drilling screw including a drilling section (1; 4) adjoining a thread section (2; 5) of the screw and formed of first (11; 41) and second (12; 42) parts arranged one after another, within the drilling section (1; 4) having first and second cutting edges (15, 16; 45, 46) a radial extension of which is symmetrical with respect to the longitudinal axis of the screw, in the first, in a drilling direction, part of the drilling section (1; 4), with at least a portion of the second part (12, 42) of the drilling section (1, 4), which is located between the first part (11, 41) and the thread section (2; 5), having in a region of one of the first cutting edges (15; 45), a radial extension (R1; R3) corresponding, at most, to a half of a root diameter (D1; D3) of the thread section (2; 5), and with the second cutting edge (16, 46) having in the second part (12, 42) of the drilling section (1, 4), a radial extension (R2; R4) which is smaller than a half of a pitch diameter (D2; D4) of the thread section (2, 5) and corresponds at least to the half of the root diameter (D1; D3) of the thread section (2; 5).
    • 一种自钻螺钉,其包括邻接所述螺钉的螺纹部分(2; 5)的钻孔部分(1; 4),并由所述第一部件(11; 41)和第二部件(12; 42) 具有第一和第二切削刃(15,16; 45,46)的钻孔部分(1; 4),其第一和第二切削刃(15,16; 45,46)的径向延伸部相对于所述螺杆的纵向轴线对称, 所述钻孔部分(1; 4)具有位于所述第一部分(11,41)和所述螺纹部分(1,4)之间的所述钻孔部分(1,4)的所述第二部分(12,42)的至少一部分 2; 5),在所述第一切削刃(15; 45)中的一个的区域中具有至多对应于所述螺纹的根直径(D1; D3)的一半的径向延伸部(R1; R3) (2; 5),并且在钻孔部分(1,4)的第二部分(12,42)中具有第二切削刃(16,46)的径向延伸部分(R2; R4)小于 节距直径(D2; D4)的一半 读取部分(2,5),并且至少对应于根部直径的一半(D1; D3)的螺纹部分(2; 5)。