
A gravitational electric power generating device includes a driving shaft, at least a spinning wheel, and two mount assemblies, in which each of the spinning wheels includes a first spoke rim, a second spoke rim, a wheel hub, and at least a tread-wheel. The two mount assemblies are erected at the two ends of the driving shaft, respectively, and can support both the driving shaft and the spinning wheel on the driving shaft. Using a moving object to move in the tread-wheel, and making use of the g...











