Patent ID: 7891460

Claim:
A gear box active front steering system, comprising: a steering column that is connected to a steering column joint, the steering column joint being connected to a gear box and configured to transmit a steering force applied to a steering wheel by a driver to the gear box that reciprocates a rack bar connected with tie rods that are connected to wheels; an AFS ECU that calculates motor control values using steering values and information of speed of a vehicle to obtain desired steering output on the basis of the speed, and corrects the desired steering output when the result from the operation of a motor is fed-back; and an actuator assembly that has an AFS input portion, a steering input portion, and a decelerator, the AFS input portion protruding from a side of a housing that accommodates the rack bar and forms the entire outer shape of the gear box, and normally/reversely rotating while communicating with the AFS ECU, the steering input portion vertically protruding from the gear box and connected to the steering column joint that is connected to the steering column that receives the steering force from the steering wheel, and the decelerator being mounted in the housing to allow the rack bar to reciprocate with rotation and generating final steering output that changes the steering response from the steering wheel to the driver on the basis of the speed of the vehicle that is traveling by adding the steering input to the AFS input; wherein the decelerator comprises a planetary gear mechanism with shafts extending in a first direction; wherein the steering input portion includes a steering input member that is rotated by the steering column joint connected to the steering wheel through the steering column; and wherein the steering input member is a long shaft with teeth on the outside that extends in a direction transverse to the first direction of the decelerator planetary gear mechanism shafts.