A flywheel device comprising:
- a base;
- a cantilever mounted on a side of the base;
- a bearing seat mounted on a center of the base;
- a plurality of first magnetic members mounted on a top of the base;
- a rotation shaft arranged between the cantilever and the bearing seat;
- a magnetically floating seat mounted on the rotation shaft;
- a plurality of second magnetic members mounted on a bottom of the magnetically floating seat and corresponding to the first magnetic members;
- a plurality of third magnetic members mounted on a periphery of the magnetically floating seat;
- a repulsion driver locked on a periphery of the base and surrounding the magnetically floating seat;
- a plurality of fourth magnetic members mounted on the repulsion driver and corresponding to the third magnetic members;
- and
- a flywheel unit mounted on the rotation shaft and located above the magnetically floating seat;
- wherein:
- the top of the base is provided with a first receiving groove;
- the cantilever includes an upright portion, and a horizontal portion;
- the upright portion of the cantilever is secured to the base;
- an upper bearing is mounted on the horizontal portion of the cantilever;
- at least one lower bearing is mounted on the bearing seat;
- the rotation shaft has an upper end pivotally mounted on the upper bearing and a lower end pivotally mounted on the at least one lower bearing;
- the rotation shaft is provided with a positioning flange;
- the magnetically floating seat is located above the positioning flange and spaced from the base, with a clearance being defined between the magnetically floating seat and the base;
- the magnetically floating seat has a center provided with a shaft hole mounted on the rotation shaft;
- the shaft hole has an inner diameter smaller than an outer diameter of the positioning flange, with the shaft hole of the magnetically floating seat being positioned above the positioning flange of the rotation shaft;
- the bottom of the magnetically floating seat is provided with a plurality of second receiving grooves;
- the periphery of the magnetically floating seat is provided with a plurality of third receiving grooves;
- the repulsion driver has a hollow interior receiving the magnetically floating seat;
- the repulsion driver is provided with a plurality of fourth receiving grooves;
- the flywheel unit includes two support members, and a plurality of flywheels arranged between the two support members;
- each of the two support members has a periphery provided with a plurality of wheel supports pivotally connected with the flywheels and has a center provided with a shaft hole mounted on the rotation shaft;
- the first magnetic members are received in the first receiving groove;
- the second magnetic members are received in the second receiving grooves;
- each of the second magnetic members has a polarity the same as that of each of the first magnetic members to produce a repulsive force between the second magnetic members and the first magnetic members;
- the third magnetic members are received in the third receiving grooves;
- the fourth magnetic members are received in the fourth receiving grooves;
- and
- each of the fourth magnetic members has a polarity the same as that of each of the third magnetic members to produce a repulsive force between the fourth magnetic members and the third magnetic members when the magnetically floating seat is rotated.