Motor and electric power steering apparatus including the same
The present invention relates to an electric motor and an electric power steering apparatus including the same. According to an embodiment of the present invention, problems such as a malfunction of an electric motor, damage to a component of the electric motor, and lowering of an output of the electric motor can be solved by preventing penetration of foreign substances into the electric motor, so that a steering stability of a vehicle can be improved.
1. An electric motor comprising:
a flange coupled to a housing and having a hole, through which a driving shaft of the electric motor passes;
a sealing member of which an outer peripheral surface is attached to and supported by the hole and through which the driving shaft passes, such that a space between the driving shaft and the hole is blocked; and
a rib formed around the hole of the flange and protruding in an axial direction of the flange,
wherein the rib has a plurality of cutaway recesses grooved in the axial direction and spaced apart from each other in a circumferential direction.
2. The electric motor of claim 1 , wherein a stepped portion protruding to an radially inner side is formed on an inner peripheral surface of the flange to support one side of the sealing member.
3. The electric motor of claim 1 , wherein the sealing member includes a large diameter portion attached to an inner peripheral surface of the hole, and a small diameter portion extending from the large diameter portion to an axially outer side of the hole.
4. The electric motor of claim 3 , wherein a coating layer of a friction reducing material is formed on an inner peripheral surface of the sealing member.
5. An electric power steering apparatus comprising:
the electric motor of claim 1 ; and
a pulley coupled to the driving shaft and having protrusion supports protruding to radially outer sides at opposite ends thereof to support opposite ends of a driving belt.
6. The electric power steering apparatus of claim 5 , wherein a stepped portion protruding to an radially inner side is formed on an inner peripheral surface of the flange to support one side of the sealing member.
7. The electric power steering apparatus of claim 5 , wherein the sealing member includes a large diameter portion attached to an inner peripheral surface of the hole, and a small diameter portion extending from the large diameter portion to an axially outer side of the hole.
8. The electric power steering apparatus of claim 7 , wherein a coating layer of a friction reducing material is formed on an inner peripheral surface of the sealing member.