Patent ID: 8936132
Filing Date: 2015-01-20
Classification: B60R,B62D,F16H,G01L,Y10T

Abstract:
1. A motor-driven power steering apparatus comprising: an input shaft and an output shaft being coaxially connected via a torsion bar; a drive gear connected to an electric motor, the drive gear being pivoted to a gear housing; a driven gear engaging with the drive gear, the driven gear being fixed to an intermediate portion of the output shaft; a torque detecting structure detecting a steering torque applied to the input shaft, the torque detecting structure being provided between the input shaft and the output shaft; a spiral cable spirally wound around a same axis of the input shaft and the output shaft in an inner portion of the gear housing; and one end portion of the spiral cable being connected to the torque detecting structure, another end portion of the spiral cable being connected to a torque detection result pickup portion, and driving of the electric motor being controlled on the basis of the steering torque which the torque detecting structure detects, wherein a rotation preventing structure is installed in the gear housing which prevents the drive gear from rotating with respect to the gear housing.