Patent ID: 7445080

Claim:
A variable steering rack system comprising: a steering rack bar being driven from a steering gear box and defining a stop protrusion in a predetermined position thereon; a cylindrical case supported by the steering gear box and defining a penetration hole through which the steering rack bar penetrates; a pair of spaced-apart stop rings secured to an interior circumference of the case at a predetermined interval along a longitudinal moving direction of the steering rack bar; a spiral groove formed on the interior circumference of the case between the stop rings; a stopper movably disposed in the interior circumference of the case to be movable along the moving direction of the steering rack bar between the pair of stop rings, an exterior surface of the stopper being slidably disposed within the spiral groove such that the stopper can move along the moving direction of the steering rack bar by rotating the stopper; wherein the stop protrusion selectively contacts the stopper corresponding to the movement of the steering rack bar in the moving direction to regulate the movement displacement of the steering rack bar.