Now there are many newly developed mining enterprises, in order to complete the mining project, they need a lot of new mining machinery and equipment. Harrow winch is a new type of mining machinery and equipment, which plays a very important role in the development of mining industry. It mainly includes these kinds of structural devices, speed reduction device, main drum, auxiliary drum, control device, rope guide device and motor. When the motor of scraper winch is started, when the internal gear is not locked, each internal gear rotates and the drum does not move under the action of wire rope and scraper. If one of the internal gears is locked by the operating device, its corresponding winding shaft will rotate and wind the rope. At the same time, it will take away the belt. When the scraper moves, the other gear is not locked at this time. Under the active action of the wire rope, its drum is driven to rotate to release the wire rope. In this way, the handle alternately locks the internal gears of the main drum and the auxiliary drum, and the scraper moves back and forth to perform the rake operation.