Lock nut

摘要

The invention provides a lock nut with a nut body which has a threaded section with an internal thread and an adjoining inner annular groove. An annular lock washer made of metal is held in the annular groove. An internal thread corresponding to the nut thread is cut into the inner circumference of the annular washer, and the internal thread of the annular washer is offset axially in relation to the nut thread by a distance which is smaller than a thread pitch of the nut thread. According to the invention, the thickness of the annular washer at the inside diameter thereof is greater than the thickness of the annular washer at the outside diameter to thereof. As a result, the elasticity of the annular lock washer and the holding force of the lock nut can be adjusted.

主权项

1. A lock nut comprising:
a nut body having a threaded section including a first internal thread and a neck extension, the neck extension including an inner wall forming an inner annular groove adjacent to the first internal thread; an inner annular disk of metal which is held in the inner annular groove; at an inner circumference of the inner annular disk, a second internal thread corresponding to the first internal thread of the threaded section; wherein the second internal thread of the inner annular disk is offset axially relative to the first internal thread of the nut body by a distance which is smaller than a thread pitch of the first internal thread, a thickness (W) of the inner annular disk at its inner diameter is larger than a thickness (w) of the inner annular disk at its outer diameter; and wherein the inner annular groove includes a surface extending from the first internal thread to the inner wall of the neck extension, and the inner annular disk includes a surface extending from the second internal thread to an outer periphery of the inner annular disk wherein either at least a portion of the surface of the inner annular groove or a portion of the surface of the inner annular disk includes a deformable step, the deformable step compensating for manufacturing tolerances and being deformed when the inner annular disk is crimped in the inner annular groove.