BALL JOINT INSERT Russian patent published in 1999 - IPC

FIELD: transport machine engineering, namely inserts of ball joints of front suspension of transport vehicles. SUBSTANCE: insert of ball joint is made of thermoplastic material and it has spherical outer and inner surfaces and truncated end. Insert has dents on outer spherical surface for fixing it in body of ball joint. Insert has buildup structure along line of equatorial diameter and it is made of solid semispherical portion and solid truncated semispherical ring. Spherical inner surfaces of solid semispherical portion of insert and of solid truncated semispherical ring of insert are smooth ones. Height of solid truncated semispherical ring is selected in range consisting 0.19-0.34 of inner diameter of insert. Buildup parts of insert of ball joint are made of thermoplastic antifriction wear resistant composition material on base of aliphatic polyamide or propylene containing (4.5-32)% mass of polyethylene and as strengthener - (10.1-14.95)% mass of twisted low-module cellulose hydrate based carbon fibres or non-twisted high-module polyacrylonitrile based carbon fibres. There are 4-8 fixing dents on outer spherical surface of solid semispherical portion of insert. EFFECT: enhanced strength antifriction characteristics, increased operational resource. 2 cl, 1 dwg, 1 tbl