Patent ID: 6843343

Claim:
An electric power steering device comprising: a pinion shaft to which a steering torque is applied; a motor that provides an auxiliary torque for assisting said steering torque; a rack shaft having rack-teeth that mate with a pinion formed at said pinion shaft, said rack shaft including a hollow portion; wheels provided at both ends of said rack shaft and steered by converting rotation motion of said pinion shaft to displacement motion in a direction of said rack shaft as a result of mating said pinion with said rack-teeth; a rack housing for said rack shaft; a first supporting member that supports one end of said rack shaft, said first supporting member being said rack-teeth provided at said one end of said rack shaft, said pinion provided at said pinion shaft mating with said rack-teeth to support said rack shaft; a second supporting member that supports the other end of said rack shaft; and a third supporting member that slideably supports a portion between said one end and said the other end with respect to said rack housing.