| 摘要 |
PURPOSE: An inner ball joint in a steering system for a vehicle is provided to improve stiffness and durability by increasing bounding force by reducing the resistance of a shaking torque and a rotational torque by installing a rolling unit to a ball sheet for contacting to a ball. CONSTITUTION: An inner ball joint of a steering system for a vehicle is composed of a ball(180) formed to an end of a tie road(130) connected with a tire wheel for steering; a ball sheet(170) installed at the outside of the ball to cover the ball; a ball housing(160) of which one side is opened to house the ball seat; and a rolling device reducing friction between the ball sheet and the ball by point-contacting to the ball. The rolling device is formed by a ball bearing having plural rolling balls(172).
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