| 摘要 |
A ball joint structure between a lower arm and a steering knuckle for a vehicle is provided to ensure the grounding property of a tire and maintain wheel tread by causing the roll center of the tire to be adjusted downward according to steering. A ball joint structure between a lower arm and a steering knuckle for a vehicle comprises a first screw groove(22) formed at an inner-diameter surface of a knuckle arm bracket(18) integrally formed at the central portion of an inner side surface of a steering knuckle(16). A second screw groove(26) is formed at an outer-diameter surface of a boss protruding from the upper surfaces of both ends of a lower arm(20). The outer-diameter surface of a boss is inserted into the inner-diameter surface of a knuckle arm bracket(18) and simultaneously balls(28) are inserted into the first and second screw grooves(22,26). The boss of the lower arm(20) moves upward when the knuckle arm bracket(18) rotates. |
