Patent ID: 6257815
Filing Date: 2001-07-10
Classification: F16B

Abstract:
A lock structure, in which a nut member is screwed on an externally threaded portion formed on an outer circumference of a shaft member in the axial direction and in which a fixed member fitted on said shaft member is thrust in the axial direction and fixed by said nut member, comprising:a lock nut member screwed in said threaded portion on the opposite side of said fixed member across said nut member;a first threaded portion formed in a portion of said nut member other than the portion screwed on said threaded portion and having a lead angle different from a lead angle of said threaded portion;a second threaded portion screwed in said first threaded portion and formed on said lock nut member;hole-shaped set threaded portions extending from an outer circumference to an inner circumference of said nut member; andset screws screwed in the hole-shaped set threaded portions and abutting against said externally threaded portions.