Patent ID: 6702051
Filing Date: 2004-03-09
Classification: A61G,Y10S

Abstract:
A detachable transmission mechanism for a wheel chair, comprising:a control unit, having a vertical shaft connecting with a handle, passing through a hub and having an axial rod extending from a lower part thereof; an engaging unit, including a connecting frame with two extending outward limit plates at a lower end of the vertical shaft and a fixing base disposed between two extending outward limit plates, each of the two limit plates having an axial hole being passed through by the axial rod with a joining part being located at a bottom thereof, the fixing base having a fitting ring for receiving and joining a sleeve with the axial rod being connected to the sleeve and passing through the limit plates for connecting with a connecting piece, and the fitting ring at a lateral side thereof having a pivotal part; a battery unit, further comprising a case and at least a battery inside the case, being fixedly attached to the pivotal part; and a transmission device, further comprising an electric motor and an output unit, the output unit being connected to the pivotal part so to form a movement relation and an output shaft extending from a lateral side thereof to connect with a driving wheel; wherein, once original front wheels of the wheel chair are detached and the hub and the pivot part are mounted to an upper and a lower frame of the wheel chair, the battery unit can be fixed under a seat of the wheel chair; when a control switch is turned on, the driving wheel can rotate in a forward or a reversed direction with the wheel chair moving forward or backward; and by turning the handle, the driving wheel at a bottom of the wheel chair can be rotated so as to allow the wheel chair making a turn.