Patent ID: 7288849

Claim:
A gravitational electric power generating device, comprising: a driving shaft; at least one spinning wheel, wherein each of the spinning wheel has a first spoke rim, a second spoke rim, a wheel hub, and at least a tread-wheel, and the first spoke rim and the second spoke rim are separately disposed at the outermost sides of the tread-wheel, and the wheel hub is located between the first spoke rim and the second spoke rim, and is disposed in the center of the two spoke rims, and the wheel hub has a holding device and is wrapped on the driving shaft in a rotating manner; and two mount assemblies erected at the two ends of the driving shaft, respectively, for supporting the driving shaft and the spinning wheel on the driving shaft; wherein the holding device of the wheel hub is to clamp the driving shaft, and when the holding device is in the unclamping position, the spinning wheel is able to rotate around the driving shaft freely, and when the holding device is in the clamping state, the spinning wheel is able to drive the driving shaft to rotate simultaneously, and using a moving object, which has a certain amount of weight, to move in the tread-wheel of the spinning wheel, and making use of the gravitational effect of the moving object, the spinning wheel is able to drive the driving shaft to rotate, and the mount assemblies have a power conversion module which is connected to an electric generator, and the rotational inertia of the driving shaft is transmitted to the electric generator to generate the electric power by the power conversion module.