公开(公告)号：US11982309B2

公开(公告)日：2024-05-14

申请号：US17627300

申请日：2020-07-13

Applicant: NHK SPRING CO., LTD.

Inventor： Shigeru Kuroda ,  Yuya Nagata

IPC: F16C11/06

CPC classification number: F16C11/0623 ,  F16C11/0685

Abstract: A ball joint includes: a ball stud including a stud portion having one end portion connected to a structural member and another end portion, to which a ball portion is integrally joined; a housing made of metal and configured to support the ball portion to allow swinging and rotating movement of the ball portion; and a ball seat made of plastic and interposed between the housing and the ball portion. The ball seat includes a plurality of protrusions jutting out from the ball seat and inserted into a plurality of through holes formed in a bottom portion of the housing. The protrusions having pierced through the through holes are staked at their distal portions. The protrusion of the ball seat has a large diameter portion, whose diameter is larger than an inner diameter of the through hole, at its proximal portion proximal from the distal portion thereof.