Patent ID: 7723882

Claim:
An electric motor comprising: a housing that has a bearing receiver, which is configured into a generally cylindrical shape; a bearing that is fixed in an interior of the bearing receiver; a rotatable shaft that is rotatably supported by the bearing and has a distal end section, which projects outward to an outside of the housing through an opening of the bearing receiver; and a lubricant that is applied to an outer end surface of the bearing, wherein: the rotatable shaft has a closing means for substantially closing the opening of the bearing receiver; the closing means is at least partially received in the opening of the bearing receiver and is opposed to the outer end surface of the bearing; the closing means is formed integrally with a speed reducing gear that is fixed to the distal end section of the rotatable shaft on a side of the closing means, which is opposite from the bearing receiver; a distal end part of the bearing receiver, which projects toward the outside of the housing, radially inwardly protrudes; the closing means includes a closer that axially projects from a base end surface of the speed reducing gear, which is located on a bearing receiver side of the speed reducing gear, into the opening of the bearing receiver; the base end surface of the speed reducing gear and the closer form a stepped portion; a gap is formed between the stepped portion and the bearing receiver to hold a leaked portion of the lubricant, which is leaked from the interior of the bearing receiver; and an outer diameter of the speed reducing gear is larger than an outer diameter of the bearing receiver.