Patent ID: 9551411
Date: 2017-01-24
CPC Classifications: B29C,F16H,H02K,Y10T

Claim:
1. An electric motor with speed reduction mechanism, comprising: a motor main body having a motor shaft; a gear case provided with a bottomed cylindrical housing unit, and attached to the motor main body; a disc-shaped cover formed with a through-hole, attached to the gear case so as to close an opening of the housing unit, and provided with a concave portion along an outer peripheral portion of an inner surface of the cover; an output member rotatably supported by the gear case, the output member having a base end portion accommodated in the housing unit, and a tip end portion protruding outside the gear case via the through-hole of the cover; a speed reduction mechanism accommodated in the housing unit, and adapted to decelerate the rotation of the motor shaft to transmit the reduced rotation to the output member; and a seal member integrally formed by: a plate-shaped portion covering the inner surface of the cover; an inner seal portion disposed on an inner peripheral edge of the through hole of the cover, and disposed in sliding contact with an outer peripheral surface of the output member; a U-shaped outer seal portion fitted into the concave portion formed along the outer peripheral portion of the inner surface of the cover, and disposed in contact with an opening end of the housing unit; and anchor portions latched onto another surface of the cover via a mounting hole of the cover; wherein the outer peripheral portion of the cover is provided with stopper claws extending along an outer lateral surface of the housing; wherein stopping segments are formed on the outer peripheral portion of the housing unit of the gear case; wherein the stopper claws are located between the housing unit and respective stopping segments, and engage their respective stopping segments; wherein the periphery of the outer seal portion is positioned between, and in contact with, the housing unit and the stopper claws in a radial direction of the housing unit.