Novel anti-loose self-tapping screw

The utility model relates to the technical field of fasteners, in particular to a novel anti-loose self-tapping screw which comprises a conical tail, a bolt body, threads and a pan head, the conical tail is located at the bottom end of the bolt body, the threads are divided into an upper layer and a...

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Bibliographische Detailangaben
Hauptverfasser:	HU ZHIHUI, GENG XIAOCHAO, ZHANG YAN, SANG YUNDE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	The utility model relates to the technical field of fasteners, in particular to a novel anti-loose self-tapping screw which comprises a conical tail, a bolt body, threads and a pan head, the conical tail is located at the bottom end of the bolt body, the threads are divided into an upper layer and a lower layer and surround the bolt body, the pan head is located on the uppermost portion of the bolt body, and a cross-shaped pan opening is formed in the pan head. A detachable anti-loosening cushion block is arranged on the bolt body, 4-6 evenly-distributed pricking needles are arranged on the lower portion of the bolt body, a groove for containing a compression spring is formed in the middle of the bolt body, the diameter of the groove is smaller than that of a pan head, and a pressing face is further arranged on the upper portion of the groove and provides an extrusion face for the pan head. The compression spring is positioned between the pan head and the anti-loose cushion block; and the pan head is fixedly