| CPC H02K 7/02 (2013.01) [F03G 3/08 (2013.01); F16F 15/31 (2013.01)] | 9 Claims |
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1. A flywheel device, comprising:
a disc-shaped body to be coupled to an external driving source;
a pair of ball screw members;
a pair of masses;
each of the ball screw members including a screw shaft and a pair of ball nuts;
the screw shaft radially pivoted within the disc-shaped body and having a middle section, a left section having forward threads, and a right section having reverse threads,
one of the ball nuts screwed to the left section and the other ball nut screwed to the right section to allow each of the ball nuts moving back and forth between a starting position and an ending position; and
one of the masses being coupled to the ball nuts screwed to the left sections of the screw shafts and the other mass being coupled to the ball nuts screwed to the right sections of the screw shafts to allow the masses approaching or moving away from the middle section synchronously, thereby enabling the moment of inertia of the flywheel to be variable.
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