Fecha de publicación: 20/07/2021 Fuente: Wipo Olive Table The utility model belongs to the technical field of general equipment, relates to an asymmetric bidirectional conical thread connection pair with an olive-shaped taper, which is small in left and large in right, and solves the problems of poor self-positioning and self-locking performance and the like of the conventional thread. The internal thread (6) is a bidirectional conical hole (41) (non-entity space) on the inner surface of the cylindrical matrix (2), the external thread (9) is a bidirectional cone frustum body (71) (material entity) on the outer surface of the cylindrical matrix (3), and the complete unit thread is a spiral special bidirectional conical body (93) with the left side taper (95) smaller than the right side taper (96) and with the large middle and the small two ends. Performance mainly depends on conical surfaces and conicity of mutually-matched threaded bodies. The double-conical-surface threaded connection device has the advantages that the internal threads and the external threads form a section-by-section conical pair through a conical hole containing cone and a bidirectional conical hole (41) and a bidirectional conical table body (71) to form a threaded pair (10) until the internal cones and the external cones are in spiral conical surface sizing fit or sizing interference, so that a threaded connection function is realized.