| 摘要 |
A ball joint 10 includes a ball seat 200, and the ball seat 200 includes a thermal caulking portion 221 for fixing a ball seat 200 to a housing 300. The ball seat 200 includes a concave portion 212 having an overhang portion 212b for withstanding a pullout load so as to prevent a ball portion 120 from coming off from the concave portion 212. The concave portion 212 of the ball seat 200 is formed of polyoxymethylene, and the overhang portion 212b and the thermal caulking portion 221 are formed of a resin, in which glass fiber is added to the polyoxymethylene, so as to be strengthened. Consequently, the pullout load can be increased, and the weight of the ball joint is maintained and the production cost is not greatly increased. |
