Patent ID: 7237647

Claim:
An electric power steering apparatus, comprising an electric motor for producing a steering assist force, further comprising: a speed reducing mechanism for decelerating a rotation of a rotatable shaft in the electric motor; and a converting mechanism for converting an output rotation of the speed reducing mechanism into an axial movement of a steering shaft extending toward right and left sides of a vehicle, the speed reducing mechanism comprising a pair of input pulleys disposed coaxially with the rotatable shaft in the electric motor, a pair of output pulleys arranged with the steering shaft enclosed thereby, and a pair of belts for connecting the input pulleys and the output pulleys which respectively correspond to each other, wherein each of the pulleys is composed of a toothed pulley, each of the belts is composed of a cogged belt, and a phase of teeth of one of the pair of input pulleys is opposite to a phase of teeth of the other input pulley.