Anti-seismic and anti-reversing expansion bolt

• Main Authors: ZHU LIANJIE, WU LIHANG
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2022
• 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 utility model discloses an anti-seismic anti-backing expansion bolt which comprises a connecting column, a connector and a threaded column, the two ends of the connecting column are fixedly connected with the end of the connector and the end of the threaded column respectively, a sliding ring is connected to the surface of the connecting column in a sliding mode, and four arc-shaped expansion plates are arranged on the side face of the sliding ring in a circumferential array mode. A cylindrical groove is formed in the inner arc face of the arc-shaped expansion plate, a sliding plate is slidably connected to the inner wall of the cylindrical groove, and a cylindrical rod is fixedly installed on one side of the sliding plate. According to the anti-seismic and anti-reversing expansion bolt, after the expansion bolt is installed in the installation hole, a nut is rotated to enable a connector to move rightwards, so that an arc-shaped expansion plate is expanded to abut against the inner wall of the installati