Patent ID: 8789647
Filing Date: 2014-07-29
Classification: B62D,F01B,F16D,F16H,Y10T

Abstract:
1. A steer by wire apparatus performing steering operation by turning a wheel to the left or to the right when a vehicle turns, comprising: a tie rod provided with one end pivotally connected to a knuckle of the wheel; a coupling unit rotatably mounted at a sub-frame of a vehicle body, connected to the other end of the tie rod, and converting rotation direction of torque from a first rotation direction to a second rotation direction which is substantially perpendicular to the first rotation direction so as to slidably move the tie rod from the coupling unit and control a steering angle of the wheel; a motor unit fixed to the sub-frame and supplying the torque to the coupling unit according to a control signal of a vehicle ECU, the rotation direction of the torque being the same as the first rotation direction or being opposite to the first rotation direction; wherein the coupling unit includes: wherein the first and second rotation shafts have a cylindrical shape, a plurality of first insert holes is formed at one surface portion of the first rotation shaft with a predetermined depth, and a plurality of second insert holes corresponding to the plurality of first insert holes is formed with a predetermined depth at one surface portion of the second rotation shaft close to the one surface portion of the first rotation shaft.