CONNECTION PAIR HAVING AN OLIVE-SHAPED SMALL LEFT-SIDE AND LARGE RIGHT-SIDE TAPER ASYMMETRICAL BIDIRECTIONAL CONICAL THREAD

摘要

Disclosed is a connection pair having an olive-shaped small left-side and large right-side taper asymmetrical bidirectional conical thread, comprising an external thread (9) and an internal thread (6) having a threaded fit with one another, wherein the internal thread (6) is a bidirectional conical hole (41) on the inner surface of a tubular matrix (2) and the external thread (9) is a bidirectional truncated circular cone body (71) on the outer surface of a columnar matrix (3), each of the complete unit threads thereof being an olive-shaped (93) special bidirectional conical body with a left-side taper (95) smaller than the right-side taper (96) in the form of a spiral and having a large middle and two small ends, the performance thereof mainly depending on the mutual fit of the circular cone surfaces and taper sizes of the thread bodies. The internal and external threads form thread pairs (10) of a series of circular cone pairs composed of a bidirectional conical hole (41) and a bidirectional truncated circular cone body (71) by means of the cone holes containing the cones, until the inner and outer circular cones form a spiral circular cone surface fixed-diameter fit or fixed-diameter interference to implement a threaded connection function, solving the problem of the poor self-positioning and self-locking performance of existing threads.