The invention discloses a double-beam sliding piece linkage folding up-down treading type portable bicycle which comprises double beams, a folding piece, a sliding piece, two groove-shaped connecting pieces, a front frame, a front fork, pedals, a lower connecting rod, an upper connecting rod, a saddle pipe, a saddle, a V-shaped folding handle, a front wheel, a rear wheel and a driving mechanism. The double beams are formed by welding two flat pipes, two crosspieces, a bearing seat, a connecting pipe, a positioning shaft, a left rear fork piece and a right rear fork piece. The folding piece is connected with the front ends of the double beams and the rear end of the front frame, the sliding piece is connected with the middles of the double beams in a sliding mode, the groove-shaped connecting pieces are welded to the front frame and the saddle pipe respectively, the rear wheel is installed on the left rear fork piece and the right rear fork piece, the sliding piece is connected with the lower connecting rod and the upper connecting rod, the lower connecting rod and the upper connecting rod are then connected with the groove-shaped connecting pieces on the front frame and the saddle pipe, a double-beam folding piece is connected with the front end of the saddle pipe, the saddle is connected with the rear end of the saddle pipe, the front fork is connected with the front frame, the front wheel is connected to the front fork, the V-shaped folding handle is connected with the front fork, and the driving mechanism comprises a left crankshaft, a right crankshaft, a chain wheel, two foot bars, the two pedals, a flywheel and a chain.
Double-beam sliding piece linkage folding up-down treading type portable bicycle
2015-05-13
Patent
Electronic Resource
English
IPC: | B62K Fahrräder , CYCLES |