Device for high speed falling body realizing uniform speed descent

The utility model relates to a device for a high speed falling body realizing uniform speed descent. A speed regulating motor drives a worm speed reducer through a belt pulley pair; the worm speed reducer can drive a speed increasing gear pair to drive a uniform speed shaft to rotate; the uniform speed shaft is connected with an overrunning clutch; a tacho-generator contacts the uniform speed shaft; a loaded object is hung on a wire rope hook, and is wound on a hoist cylinder via a pulley wheel; one end of the cylinder is provided with a brake; a hoist shaft contacts the overrunning clutch; another tacho-generator contacts the hoist shaft. When the uniform speed shaft reaches a preset speed, the overrunning clutch can slip, the brake is loosened, and the loaded object can freely fall down; when the speed of the hoist exceeds the rotating speed of the uniform speed shaft, the overrunning clutch is closed, the rotating speed of the hoist can be equal to the speed of the uniform speed shaft, and the object falls at a uniform speed.