AUTOMATIC/MANUAL CONVERSION APPARATUS FOR WINCH

An automatic/manual conversion apparatus for a winch is provided to make automatic/manual operation freely without additional conversion process for selecting automatic or manual operation. An automatic/manual conversion apparatus for a winch contains an automatic input shaft(110) transferring power from an electric motor and coupled with a coupling(180) by a key, an automatic input bevel gear(120) coupled with the automatic input shaft to rotate, a manual input unit(130) transferring the rotary force of a manual wheel to a manual input bevel gear in one direction and comprising a manual wheel(131), a worm(132) coupled to the center of the manual wheel and a worm wheel(133) engaged with the worm, a manual input bevel gear(140) having a hollow and coupled with the worm wheel by a key, a power transmission bevel gear(150) engaged with the automatic input bevel gear and the manual input bevel gear to rotate, a power transmission unit(160) transferring the rotary force of the automatic input bevel gear or the manual input bevel gear and comprising a thick disk having a hollow and two cylindrical power transmission bevel gear shafts located on the outer circumferential surface of the disk, and an output shaft(170) coupled to the power transmission unit by a key via the automatic input bevel gear, the power transmission unit, and the hollow of the manual input bevel gear.