Electric driving device and electric power steering device

An electric driving device, comprising:

• a motor;
• and
• a control unit configured to control the motor,
• wherein the control unit includes:
• a holder having a holder surface;
• and
• a bus bar arranged on the holder surface,
• wherein the bus bar has a plate-like portion placed on the holder surface in an overlapping manner,
• wherein the plate-like portion has an opposed surface opposed to the holder surface,
• wherein the holder has a first protruding portion protruding from the holder surface,
• wherein the first protruding portion has a first columnar portion and a plurality of first ribs formed on an outer peripheral surface of the first columnar portion so as to be spaced apart from each other in a circumferential direction of the first columnar portion,
• wherein the plate-like portion has a first through hole into which the first protruding portion is press-fitted,
• wherein the first through hole is defined by a first through hole forming portion formed in a cylindrical shape so as to project from the plate-like portion to a side opposite to the opposed surface,
• wherein the first through hole has an inner surface including:
• a first hole inclined inner surface that is inclined in a direction of reducing an inner diameter of the first through hole with respect to the opposed surface from the opposed surface toward an end portion of the first through hole forming portion;
• and
• a first hole cylindrical inner surface extending from the first hole inclined inner surface to the end portion of the first through hole forming portion with the inner diameter of the first through hole kept constant,
• wherein the first protruding portion is press-fitted into the first through hole under a state in which the plurality of first ribs are in contact with the first hole cylindrical inner surface, and
• wherein the first protruding portion and the first through hole are connected by only a press-fit joint.