CONNECTION STRUCTURE OF BOLT AND NUT OF THREAD OUTLINING SYMMETRICALLY AND BIDIRECTIONALLY TAPERED OLIVARY SHAPE

摘要

A connection structure of a bolt and a nut of a thread outlining a symmetrically and bidirectionally tapered olivary shape, an internal thread (6) on the inner surface of a cylindrical body (2) outlining a bidirectionally tapered hole (41) , an external thread (9) on the outer surface of a columnar body (3) outlining a bidirectionally tapered-frustum body (71), and each complete threaded body unit forming a bidirectionally tapered body in an olivary shape (93) having a large middle part and two small ends, the left-end conical degree (95) and the right-end conical degree (96) being same and/or approximately same, solving the problems of poor self-positioning and self-locking of existing threads, etc. The performance mainly depends on the tapered face and conical degrees of the threaded body and The advantage is that: the internal thread and the external thread outline the tapered body by means of the tapered hole, such that the bidirectionally tapered hole (41) and the bidirectionally tapered-frustum body (71) form a thread pair (10) with joints of tapered pairs until the inner and outer tapered bodies have helical tapered faces with sizing fit or sizing interference, so as to realize the threaded connection function.