Patent ID: 7772730

Claim:
A magnetic wheel assembly comprising: a foundation body having a space defined therein, said space having a wear plate therein; a cover body positioned over said foundation body; a central axle extending through said foundation body and said cover; a flywheel connected to said central axle and positioned over said cover body; a drive motor having a drive shaft; a drive gear assembly connected to said drive shaft so as to be driven by said drive motor, said drive gear assembly comprising: a gear shift unit having teeth engaged with said drive shaft, said gear shaft unit having a step gear having a first gear directly connected to an axially aligned second gear, said first gear having a diameter greater than a diameter of said second gear; a coupling element drivedly connected to said gear shift unit; and a rear gear engaged with said coupling element so as to be selectively driven by said coupling element, said coupling element and said rear gear being in a same axial direction as said central axle; a pair of magnetic control strips assembled onto said foundation body, said pair of magnetic control strips being hingedly connected to each other at one end by a pin joint so as to allow opposite ends of said pair of magnetic control strips to swing relative to each other, said drive motor and said drive gear assembly received in said space of said foundation body, said opposite end of said pair of magnetic control strips each having a toothed member affixed thereto, the toothed members being engaged with said rear gear such that the opposite ends of said pair of magnetic control strips move relative to a rotation of said rear gear; and an elastic member bearing against a surface of said gear shift unit and against said wear plate.