Variable speed control device of a power winch

1. 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.

2. The variable speed control device of the power winch according to claim 1 ,

wherein said planetary gear mechanism includes a plurality of planetary gears ( 7 ) which engage the gear segment ( 2 ) of the input shaft, each of the planetary gears ( 7 ) is mounted on the transmission seat ( 5 ) via a respective planet pin ( 9 ), and each of the planetary gears drives the transmission seat to realize said low-speed output, a ring gear ( 11 ) surrounds the planetary gears, and the ring gear engages the planetary gears, braking recesses ( 21 ) are disposed on an outer circumferential surface of the ring gear, and a clutch lever ( 20 ) of the clutch mechanism can be inserted into the braking recesses.

3. The variable speed control device of the power winch according to claim 2 , wherein said plurality of planetary gears ( 7 ) range from two to four planetary gears, and an equal number of mounting holes ( 6 ) are arranged on the transmission seat ( 5 ) corresponding to each of said planet pins.

4. The variable speed control device of the power winch according to claim 2 , wherein multi-roll bearings ( 8 ) are disposed between said planetary gears ( 7 ) and said planet pins ( 9 ).

5. The variable speed control device of the power winch according to claim 2 , wherein the braking recesses ( 21 ) range from two to four braking recesses ( 21 ).

6. The variable speed control device of the power winch according to claim 1 , wherein said connecting rod ( 15 ) is positioned in an axle hole of the gear box ( 14 ) by a supporting screw or positioning pin ( 31 ), and the supporting screw or positioning pin is connected to the gear box and inserted into a ring groove of the connecting rod.

7. The variable speed control device of the power winch according to claim 1 , wherein the variable speed control device further includes a bushing on an interface between the transmission seat ( 5 ) and the gear box ( 14 ), and a gasket ( 10 ) on a connection end surface between the transmission seat ( 5 ) and the ring gear ( 11 ).

8. The variable speed control device of the power winch according to claim 1 , wherein retaining rings ( 17 , 19 ) are disposed at two sides of the second bearing ( 18 ) between the transmission shaft ( 13 ) and the second bearing and the clutch gear ( 12 ) and the second bearing, respectively.

9. The variable speed control device of the power winch according to claim 1 , wherein said clutch mechanism includes a clutch plate ( 27 ), and the clutch plate has an external gear ( 25 ), and said external gear ( 25 ) of said clutch plate has a same module and a same number of teeth as said shifting gear ( 16 ).

10. The variable speed control device of the power winch according to claim 1 , wherein a clutch handle ( 30 ) of said clutch mechanism is embedded in a clutch plate ( 27 ), said clutch handle is connected to a clutch lever ( 20 ) via a pin ( 29 ), said pin operably passes through a long-slotted hole ( 28 ), and the long-slotted hole is arranged on the clutch plate in a perpendicular direction to the clutch lever.