Electric actuator

An electric actuator comprising:

• a motor part having a motor shaft that extends in an axial direction;
• a deceleration mechanism that is connected to one side of the motor shaft in the axial direction or the other side in the axial direction;
• an output part having an output shaft to which rotation of the motor shaft is transmitted via the deceleration mechanism;
• and
• a housing in which the motor part, the deceleration mechanism, and the output part are housed,
• wherein the motor shaft and the output shaft are disposed away from each other in a radial direction of the motor shaft,
• wherein the housing has
• a housing main body having a polygonal shape in a plan view that opens to one side in the axial direction, and
• a lid member fixed to an opening on one side in the axial direction of the housing main body,
• wherein the output shaft is positioned at a first corner of the housing,
• wherein the lid member and the housing main body are fastened by a plurality of bolts that penetrate through the lid member in the axial direction,
• wherein the plurality of bolts include
• a plurality of corner bolts positioned at respective corners of the housing other than the first corner, and
• an intermediate position bolt positioned at the intermediate between the first corner and a second corner adjacent to the first corner, and
• wherein, in a plan view, the intermediate position bolt is positioned on the side of the center of the housing with respect to an edge connecting the first corner and the second corner and on the side of an outer edge of the housing with respect to an imaginary line connecting the center of the output shaft and the corner bolt at the second corner.