Improved self-tapping screw

The utility model relates to the technical field of screw equipment, and discloses an improved self-tapping screw which comprises a screw head part, a fixing block, a fixing frame and a screw drill edge, a hexagonal screw groove is formed in the surface of the screw head part, the fixing block is fi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	FENG JIANGZHOU
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 screw equipment, and discloses an improved self-tapping screw which comprises a screw head part, a fixing block, a fixing frame and a screw drill edge, a hexagonal screw groove is formed in the surface of the screw head part, the fixing block is fixedly installed below the screw head part, a screw rod is fixedly installed below the fixing block, and the fixing frame is fixedly installed below the screw rod. The surface of the screw rod is provided with threads, a screw drilling module is fixedly installed below the screw rod, the size of the fixing frame is matched with that of the fixing block, and a groove is formed in one side of the fixing frame and movably connected with the ball. And the size of the ball is matched with that of the limiting groove. According to the utility model, a fixing effect is achieved between the fixing frame and the fixing block, so that the situation that a screw deviates from a preset position when the screw is driven in is pr