The utility model relates to a machines are maintained in bed, it includes: the transmission shaft, the transmission shaft is installed on the tractor, utilizes the tractor to drive the rotation of transmission shaft, the V belt, the V belt is the wire rope core structure, and its section be trapezoidal, whole ring of non junction, the cylindrical roller, the transmission shaft with the cylindrical roller passes through the V belt is connected, just set up the bending lancination on the cylindrical roller, utilize the transmission shaft passes through V belt and driving this sand and soil scarifying on will lying in bed is borrowed to cylindrical roller, and then drive the rotation of bending lancination, provides a comfortable bed for the milk cow. The utility model discloses simple structure, the cost of manufacture is low, and convenient operation has practicality and industrial usability.