Motor device to be easily fixed to frame

A motor device to be fixed to a frame having a seat surface and an installation hole by a bolt and a nut, the motor device having a motor, a reduction mechanism having an output shaft for reducing a rotation speed of the motor and a housing containing the reduction mechanism so as to have the output shaft penetrate therethrough, the housing having an installation portion integrally formed therein by a pair of dies parting in an axial direction of the output shaft, the installation portion comprising:

• a side surface to come in surface contact with the seat surface of the frame;
• a first recess portion for holding the nut whose entire inner surface is opened at least on one side of the housing in the axial direction of the output shaft;
• and
• a second recess portion for inserting the bolt whose entire inner surface is opened on the other side of the housing in the axial direction of the output shaft and which extends from the side surface to the first recess portion nearly perpendicularly to the axial direction of the output shaft,
• wherein the housing may be fixed to the frame by inserting the bolt into the second recess portion through the installation hole of the frame and screwing the bolt into the nut housed in the first recess portion.