CONNECTION STRUCTURE OF BOLT AND NUT WITH OLIVE-SHAPED BIDIRECTIONAL CONICAL THREAD HAVING SMALL LEFT TAPER AND LARGE RIGHT TAPER

摘要

Disclosed is a connection structure of a bolt and a nut with an olive-shaped bidirectional conical thread having a small left taper and a large right taper. An internal thread (6) is a bidirectional conical hole (41) in an inner surface of a tubular matrix (2), an external thread (9) is a bidirectional truncated cone body (71) in an outer surface of a columnar matrix (3), and each of the complete unit threads thereof is an olive-like shape (93) bidirectional conical body with a left-side taper (95) smaller than a right-side taper (96) in the form of a spiral and having a large middle and two small ends; and the performance mainly depends on the circular conical surfaces and taper sizes of thread bodies cooperating with each other. The internal and external threads form a series of circular conical pairs with the bidirectional conical hole (41) and the bidirectional truncated cone body (71) by means of a cone hole containing a cone to form a thread pair (1) until the circular conical surfaces of inner and outer circular cones in the form of spirals are in sizing cooperation or sizing interference to realize a thread connection function. Problems such as the poor self-positioning and self-locking of existing threads are solved.