DISK APPARATUS HAVING ATTACHABLE/DETACHABLE STRUCTURE TO/FROM SIDE SURFACE OF EXISTING WHEEL

The present invention relates to a disk apparatus which is detachably attached to an existing wheel, and which generates electricity that provides the driving force to move the wheel. More specifically, the disk apparatus comprises: a fixed plate attached on top of a wheel shaft, which is positioned in the center part of an existing wheel; and a ring-shaped rotating plate which is attached as a ring-shaped plate to the rim of the wheel, wherein the fixed plate is provided, on both sides, with radially fixed coil bodies, and the ring-shaped rotating plate is provided, on one side, with radially fixed magnetic bodies corresponding to the coil bodies. The disk apparatus is connected to a battery and a control box provided with a control circuit for the coil bodies, and can be attached and detached to/from an existing wheel that is in use, and thus the burden of separately manufacturing a wheel is removed and costs are reduced as a result. Additionally, a separate storage battery can store, via the coil bodies of the fixed plate, the energy generated from the rotation of the ring-shaped rotating panel installed on the existing wheel, or the ring-shaped rotating panel can be induced to drive or stop by using the stored electricity by means of the separate control box. Furthermore, with regard to the range of application of the disk apparatus, a variety of uses are possible on freely rotating wheels, such as those on a bicycle, a motorcycle or a car, significantly improving efficiency.