Patent ID: 7637348

Claim:
An electric power steering apparatus comprising: a motor for providing assistant steering power; a following pulley connected with the motor through a belt to receive driving force; a gear housing surrounding the following pulley; a motor housing rotatably assembled with the gear housing; a tension adjusting mechanism fixed to the gear housing and adjusting a rotation angle of the motor housing so as to adjust tension of the belt; a coupling part extending from the gear housing; a guide hole having a circular shape and being formed in the coupling part; and a coupling means extending through the guide hole to be assembled with the motor housing, wherein the tension adjusting mechanism includes a supporting member extending from the coupling part, and an adjusting means assembled with the supporting member while extending through the supporting member, and an end of the adjusting means makes contact with a side surface of the motor housing so that the motor housing is pushed by the end of the adjusting means to be rotated relative to the gear housing.