Patent ID: 8205902

Claim:
A trolley folding bicycle, comprising a bicycle frame, a front wheel, a rear wheel, a saddle, a folding device, and a transmission gear assembled along a bicycle body axis, wherein the bicycle frame comprises a control frame, a front half frame, a rear half frame, and a seat post, the control frame being connected to the front half frame and the front wheel, the rear half frame being connected to the seat post and the rear wheel, the transmission gear being connected to the rear half frame and the rear wheel, the folding device connecting the front half frame and the rear half frame and enabling the front half frame and the rear half frame to be folded such that the front wheel and the rear wheel move closer to each other, via the operation of the folding device, the trolley folding bicycle having a usage state and a folded state, characterized in that the trolley folding bicycle further comprises: a draw bar connected to the bicycle frame; and a draw wheel set comprising a first small wheel, a second small wheel, and a draw frame, the draw frame being connected to the rear half frame, the first small wheel and the second small wheel being connected to the draw frame; wherein when the trolley folding bicycle is in the folded state for being drawn, the draw bar forms a draw bar axis, the first small wheel and the second small wheel forms a draw rotation axis, and the draw bar axis is substantially perpendicular to the draw rotation axis.