Expansion bolt

• Main Authors: TONG XIANGDONG, XU GUOWEI
• Format: Patent
• Language: Chinese; English
• Published: 10.01.2023
• 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 utility model provides an expansion bolt which comprises a bolt, a nut and a fastening pipe, the bolt is provided with an expansion head part and a threaded part in threaded connection with the nut, the fastening pipe comprises a pipe body and a split part, the fastening pipe is sleeved on the bolt, the split part of the fastening pipe is located at one end of the head part of the bolt, and the split part of the fastening pipe is located at the other end of the head part of the bolt. Thickening structures for increasing the local thickness are arranged on the segments of the fastening pipe, and the thickness of the portions after the thickening structures and the segments are overlapped is at least two times of the thickness of the pipe wall of the fastening pipe. According to the utility model, the diameter of the head part of the bolt can be obviously increased, the tensioning force can be increased, a mounting hole with a loose wall can be well tensioned, and the bolt has better economical efficiency a