Patent ID: 7520082
Filing Date: 2009-04-21
Classification: F41A

Abstract:
1. An automatic cleaning apparatus for a gun barrel including a wheel contacting an inner surface of the gun barrel and a brush or non-woven fabric rotating against the inner surface of the gun barrel which is applied with a cleaning solution or anti-corrosive oil, and moving forward by rotation of the wheel, the automatic cleaning apparatus comprising: a gear housing interposed between a front wheel and a rear wheel which are rotated in cooperation with a plurality of motors, and having a penetrated axial center part; a main shaft installed in the center part of the gear housing, and coupled to the plurality of motors and rotated by the motors, wherein the motors are arranged in opposition to each other, and are coupled to the main shaft to transfer forces generated from the plurality of motors to the main shaft; a sun gear disposed in a direction perpendicular to an axial direction of the gear housing, and coupled to the main shaft; a plurality of planetary gears positioned in a through-hole formed on the gear housing, restrained by a fastening bolt to mesh with the sun gear to rotate on its axis; and an external gear meshed with outer surfaces of the planetary gears, the brush or non-woven fabric being detachably engaged to the external gear.