| 摘要 |
An anti-loosening threaded part comprises an internal threaded part (1) and an external threaded part (2). A cylindrical internal thread (3) is arranged in an inner hole of the internal threaded part (1), a cylindrical external thread (4) is arranged on a screw of the external threaded part (2), the root of the external thread (4) or the internal thread (3) has a wedge-shaped inclined surface (6) forming an included angle ± or an included angle ² with a longitudinal center axis (5) of the external thread (4) or the internal thread (3), tan± or tan² is less than a dynamic friction factor between the wedge-shaped inclined surface (6) and a contact surface of the internal thread (3) or the external thread (4). After the internal thread part and the external thread part are mutually tightened, a surface of the internal thread (3) or the external thread (4) and the wedge-shaped inclined surface (6) are mutually close contact structure, that is, a horizontal locking structure, and as long as the surface of the internal thread or the external thread and the wedge-shaped inclined surface are in a mutually close contact through pretightening force, loosening can be effectively prevented in cylindrical threaded part connecting pairs having threaded surfaces and made of various materials. |
