Electric drive device

An electric drive device comprising:

• a motor housing accommodating therein an electric motor that drives a mechanical control element;
• an electronic control unit provided at an end surface portion, located at an opposite side to an output portion of a rotation shaft of the electric motor, of the motor housing;
• a connector assembly provided at the electronic control unit on an opposite side to the end surface portion of the motor housing, the connector assembly having, around an external terminal forming portion, an annular-grooved seal portion formed integrally with the connector assembly and having an annular seal groove that is filled with a liquid sealant, and penetration holes which are formed integrally with the connector assembly and into which fixing bolts for fixing the connector assembly to the end surface portion of the motor housing are inserted;
• and
• a metal cover covering the electronic control unit from an outside, the metal cover having an exposure hole through which the external terminal forming portion is exposed to the outside, a flat surface portion having an annular protruding edge portion that is formed at a peripheral edge portion of the exposure hole and accommodated in the annular seal groove and a side peripheral surface portion forming an opening end that is fixed to the end surface portion of the motor housing,
• wherein the connector assembly and the motor housing are fixed with the plurality of fixing bolts, and
• wherein straight seal grooves that form the annular seal groove formed at the connector assembly so as to surround the external terminal forming portion of the connector assembly are formed in respective straight seal groove forming regions that connect adjacent penetration holes.