Patent ID: 8413749

Claim:
An auxiliary drive assembly for wheelchairs comprising: a wired transmission member that is arranged at a wheel hub and the wheel hub is disposed on a wheel of a wheelchair; at least one sensor set on the wheel and generating at least one sensing signal that is sent to the wired transmission member; a control circuit coupled to the wired transmission member and receiving the sensing signal for generating a control signal; and a drive unit coupled to the control circuit and receiving the control signal so as to drive the wheel hub rotating according to the control signal and further move the wheel; wherein the wired transmission member includes: a plurality of upper fixing plates that is disposed on the wheel hub; a plurality of lower fixing plates that is arranged at a lower cover while the lower cover and the wheel hub are matched to each other; at least one upper insulator arranged between the upper fixing plates so as to insulate the upper fixing plates from each other; at least one lower insulator disposed between the lower fixing plates for insulating the lower fixing plates from each other; and a plurality of rolling elements set between the upper fixing plates and the lower fixing plates.