Automatic opening and closing apparatus for vehicle

An automatic opening and closing apparatus for vehicle which automatically opens and closes an opening and closing body mounted on a vehicle, the automatic opening and closing apparatus for vehicle comprising:

• an electric motor having a rotating shaft;
• a gear case attached to the electric motor;
• a worm gear mechanism which reduces speed of rotation of the rotating shaft and outputs the same from an output shaft;
• a drive gear provided to the output shaft and rotated together with the output shaft, as being arranged outside the gear case;
• a driven gear having a groove portion in a circular arc shape about a shaft center and engaged to the drive gear, as being swingably supported by a support shaft integrally provided with the gear case;
• a drive arm provided with the driven gear and coupled to the opening and closing body at its tip so as to be swung together with the driven gear so that the opening and closing body is opened and closed;
• and
• a gear cover fixed to the gear case by a first fastening member penetrating the circular groove portion of the driven gear and a second fastening member arranged on an outer periphery side of the driven gear, the gear cover covering a mesh portion of the drive gear and the driven gear and having a cover side pressing portion abutting a side surface of the driven gear,
• wherein the gear cover is integrally formed with a cover side fixing leg,
• wherein the gear case is formed with a case side fixing leg corresponding to the cover side fixing leg,
• wherein the cover side fixing leg of the gear case is supported by the case side fixing leg of the gear case on the outer periphery side of the driven gear, and fixed by the second fastening member,
• wherein the gear cover abuts on one side surface of the driven gear, and the gear case abuts on the other side surface of the driven gear.