Patent ID: 7275608

Claim:
A motor-driven vehicle comprising: a vehicle frame including a main body having at least one first connecting portion and a second connecting portion that are interconnected fixedly, said first connecting portion being formed with a groove that has a lower end opening, and a retaining unit including at least one retaining plate having a pivot end disposed pivotally on said first connecting portion of said main body, and a free end rotatable between a blocking position, where said free end engages said opening of said groove in said first connecting portion of said main body so as to close said opening, and a release position, where said free end is disengaged from said groove so as to open said opening, said free end of said retaining plate being biased to said blocking position; and a driving device including a support frame disposed under said main body of said vehicle frame, a plurality of wheels mounted rotatably on said support frame, and a driving unit disposed on said support frame for rotating said wheels, said support frame having an elongated first engaging portion disposed within said groove in said first connecting portion of said main body of said vehicle frame, and a second engaging portion engaging said second connecting portion of said main body of said vehicle frame, said free end of said retaining plate preventing removal of said first engaging portion of said support frame from said groove in said first connecting portion of said main body when said free end of said retaining plate is disposed at said blocking position, removal of said first engaging portion of said support frame from said first connecting portion of said main body being allowed when said free end of said retaining plate is disposed at said release position, one of said second connecting portion of said main body and said second engaging portion of said support frame being configured as a tongue, the other of said second connecting portion of said main body and said second engaging portion of said support frame being configured as a groove.