公开(公告)号：US10145420B2

公开(公告)日：2018-12-04

申请号：US14891535

申请日：2013-12-19

Applicant: NSK LTD.

Inventor： Hiroshi Kawahara ,  Sumio Sugita

IPC: F16B7/04 ,  F16B17/00 ,  F16D1/072 ,  B21D39/04

Abstract: A joint structure includes a shaft member and a cylindrical member. The cylindrical member includes a plurality of first crimped portions crimped along a plurality of axial grooves provided in an axial direction of the shaft member, respectively, and a second crimped portion which fits the axial grooves and is crimped along a circumferential groove, the circumferential groove being provided on a circumferential surface of the shaft member by reducing a diameter of an axially intermediate portion of the cylindrical member in a radial direction. Each of the first crimped portions project from an inner circumferential surface of the cylindrical member as a projection. A position of a tip of the projection in an axis direction of the projection is set displaced from a position of a lowest point of the circumferential groove such that the tip is not located at the lowest point of the circumferential groove.