Patent ID: 8512191

Claim:
A variable speed control device of a power winch, said variable speed control device including; a power-driven input shaft ( 1 ) having a gear segment ( 2 ); a transmission seat ( 5 ) surrounding the input shaft and supported by a first bearing; a low-speed transmission mechanism being realized by a low-speed output; a high-speed transmission mechanism being realized by a high-speed output; and a controller adapted to control the low-speed output and the high-speed output; and wherein the low-speed transmission mechanism is a planetary gear mechanism; said high-speed transmission mechanism including a shifting gear ( 16 ), said shifting gear driven by the controller and connected to a connecting rod ( 15 ); a lower end of the connecting rod extending downward and forming an eccentric axis, and the eccentric axis inserted in and connected to a ring groove of a transmission shaft ( 13 ); the transmission shaft being mounted coaxially with respect to the input shaft, and the transmission shaft being axially displaceable with respect to the input shaft; a clutch gear ( 12 ) mounted on the transmission shaft, and the clutch gear supported by a second bearing ( 18 ), the clutch gear having a structure of both internal and external teeth, and the clutch gear engaging the gear segment ( 2 ) of the input shaft and engaging internal teeth of the transmission seat ( 5 ) to realize the high-speed output; and said controller being a clutch mechanism fastened to a gear box ( 14 ), and the low-speed transmission mechanism, the high-speed transmission mechanism, and a neutral state of said variable speed control device being controlled by said clutch mechanism.