Rotary target autorotation transmission component

The utility model discloses a rotary target autorotation transmission component. The rotary target autorotation transmission component comprises a water-cooling motor, a first bevel gear, a second bevel gear, a bearing, a bearing seat and a target mandrel, wherein the water-cooling motor, the first bevel gear, the second bevel gear, the bearing, the bearing seat and the target mandrel are arranged in a vacuum cavity, the water-cooling motor is in transmission connection with the first bevel gear through a rotating shaft, the first bevel gear and the second bevel gear are mutually engaged and in transmission connection, and the target mandrel is fixed on the bearing seat through the bearing and is in transmission connection with the second bevel gear; the water-cooling motor is arranged in the cavity and in transmission through the bevel gears so as to guarantee that the sealing of the cavity cannot be influenced after the cavity is used for a long time; and meanwhile, the dust produced in the working is less prone to deposition, the rotation of the rotary target cannot be influenced, and the spraying efficiency is greatly improved.