Patent ID: 6102148
Filing Date: 2000-08-15
Classification: B62M

Abstract:
An electrically powered driving mechanism for use on a common bicycle, comprising:an adjustable mounting bracket;a power transmitting assembly;a supporting bracket including a pair of adjustable supporting arms;a battery for supplying electrical power to said power transmitting assembly being secured to a bicycle;a tire having a friction tire surface and a plurality of consecutively protruded gear teeth or spots on rims of both sides thereof;said mounting bracket pivotally secured to a bicycle at one end;said power transmitting assembly further comprising:a shelter case having a cover being pivotally supported by said supporting bracket and horizontally connected to said mounting bracket;an electric motor being connected to said battery;a gear train assembly being in driving engagement with said electric motor;a dual-purpose driving unit, having a peripheral friction surface drive wheel and a gear teeth drive wheel, mounted onto said shelter case and engaged with said tire being driven by said electric motor via said gear train assembly;whereby said dual-purpose driving unit can be switched to engaged with said tire by either said friction surface or said gear teeth, either and is eccentrically located to automatically adjust in a relative position on said tire according to an operation condition of said tire.