Anti-loose fastener and connecting method

• Main Authors: DONG SHUAI, FAN YAFENG, WANG WANGBING, JIA YUNLONG, ZHANG XIAOLIAN, PAN FEIYAN, ZHAO RUI, XIAO CHANGJIU, HE XU, ZUO SHIBIN, ZHANG QIN, LIU YU, LUO TAO
• Format: Patent
• Language: Chinese; English
• Published: 15.09.2023
• 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 invention discloses an anti-loose fastener and a connecting method. The fastener is composed of a screw rod and a nut matched with threads, and the nut comprises a nut locking area and a nut thread area in the axial direction. The periphery of the nut thread area is of a regular polygon structure, and the inner wall of the nut thread area is provided with standard threads or non-standard threads used for being matched with the screw thread area to be fastened through twisting. The periphery of the nut locking area is of a cylindrical structure, the inner wall of the nut locking area is a smooth surface, and the nut locking area is used for being filled into the screw thread area to achieve fastening after radial extrusion. The connecting method comprises the steps that the nut and the screw rod are tightened and fastened through a tool, and after tightening is completed, metal in a nut locking area is extruded in the radial direction through an extrusion tool, so that the nut is locked on the screw rod to