Structure for mounting ball joint

Claim 1

In a ball joint mounting structure for mounting a ball joint in one of two structural members adapted to be joined together by said ball joint, said one structural member having a cylindrical portion, said ball joint having a hollow cylindrical housing press fitted into said cylindrical portion, characterized in that a self-caulking engaging means is provided between said housing and said cylindrical portion for automatically caulking said housing and said cylindrical portion as said housing is being press fitted into said cylindrical portion, and that said self-caulking engaging means comprises a groove formed in the outer surface of said housing and a wall portion of said cylindrical portion snugly received in said groove as said housing is being press fitted into said cylindrical portion, said housing having a knurled portion, said annular groove having a width substantially corresponding to the wall thickness of said cylindrical portion and an outer diameter substantially corresponding to the outer diameter of said cylindrical portion and inclined in frusto-conical form and the effective diameter of said knurled portion in the housing substantially corresponding to the inner diameter of said cylindrical portion, whereby as said housing is being press fitted into said cylindrical portion, the inner surface of said cylindrical portion is caused to plastically deform in conformity with the contour of said knurled portion until said opening edge is snugly received in said annular groove to thereby cause said housing and cylindrical portion to come into sealing contact with each other.