Abstract: A gravitational energy conversion device is configured to rotate or translate on a support surface. The gravitational energy conversion device has a weight and multiple energy converters; the energy converters are mounted around an exterior of the weight and disposed apart from each other. When the weight rotates or translates to make the energy converters contact the support surface, the weight presses down the energy converters due to gravity. When the weight rotates or translates to make the energy converters separate from the support surface, energy in the energy converters is released and transformed into kinetic energy of the weight. Therefore, the device is effective in energy-saving and cushioning.

Abstract: A gravitational energy conversion device for a vehicle has a rotating part and multiple energy converters. The rotating part is rotatably mounted between a vehicle main body and the ground; the energy converters are mounted on an outer annular surface of the rotating part and are disposed apart from each other around the rotating part. Each energy converter has a moving part and a resilient part. The moving part protrudes from the outer annular surface of the rotating part, and is movable toward or away from the rotating part. The resilient part is mounted between the moving part and the rotating part, and drives the moving part to move away from the rotating part.