| 摘要 |
An anti-retreating bolt comprises a head portion (1), a screw rod (2), a retreating stopper (3), and a nut (4). A top portion of the screw rod (2) is fixedly connected with the head portion (1), a center portion of the screw rod (2) is a sliding rod, an outer thread (21) is arranged at a lower portion of the screw rod (2), and a groove (22) is further arranged in the outer thread (21) at the lower portion of the screw rod (2). The retreating stopper (3) is annular, a first protrusion (31) matching with the groove (22) is arranged inside the retreating stopper (3), and an inner thread matching with the outer thread (21) is arranged on the nut (4). In this manner, the anti-retreating bolt can be effectively prevented from loosening when the bolt is impacted and vibrated, the load changes, and the temperature changes too much by means of mutual matching of the retreating stopper (3) and the groove (22) in the screw rod (2). Therefore, the bolt has high connecting strength, achieves firmer connection, and has better use effect. |
