a folding bicycle

Abstract

The present invention relates to the technical field of bicycles, in particular to a folding bicycle, which includes a main beam, a connecting beam and a front beam, and there is a device between the connecting beam and the front beam for simultaneously driving the front beam to fold when the main beam and the connecting beam are folded. The folding device, and the pedal is folded and connected with the sprocket crank, and the folding bicycle is also provided with a folding device for chain folding. The folding bicycle has the advantages of compact structure, good stability, short folding time, no falling off of the chain when folding, convenient folding and small occupied volume after folding.

Description

technical field [0001] The invention relates to the technical field of bicycles, in particular to a folding bicycle. Background technique [0002] The manufacture and sale of bicycles has a history of hundreds of years. With the development of science and technology, the technology of folding bicycles has gradually matured. [0003] The applicant applied for an invention patent with the patent number "201220620120.8" and the patent name "folding bicycle" in November 2012, which introduced a folding bicycle, "including the main beam, front wheel, rear wheel, handlebar, front fork, seat cushion, seat down tube, slide tube, front lower beam and front beam, the handlebar includes a handlebar cross bar and a handlebar vertical bar, one end of the front lower beam is connected to the front beam through a first hinge, the The front fork is connected to the handlebar vertical bar through a second hinge, the handlebar vertical bar is fixedly connected to the handlebar cross bar, the...

AI Technical Summary

Problems solved by technology

[0005] 1. The front connecting rod and the rear connecting rod are set on the main beam and the front lower beam, which forms a triangle similar to the upright position. Because the center of gravity is relatively high, it is easy to be unstable when riding a bicycle, and it is set in this way The unfolded folding bicycle looks loose in structure and not very beautiful;

[0006] 2. When folding, it needs to be folded in three steps, that is, first fold the handlebar vertical rod; then press down the seat tube to make it shrink into the slide tube, and then turn the rear wheel downward, and the slide tube will also move from the main The through hole on the beam moves down, and the front connecting rod, connecting piece, front connecting rod and main beam will also start to fold. They will be arranged in parallel and close to each other; finally, turn the front wheels over to the overlapping position of the rear wheels, so that there are more steps to fold, longer time is required for folding, and it is inconvenient to fold;

[0007] 3. The pedals are not well folded, so the horizontal volume occupied by the entire bicycle after folding is still relatively large;

[0008] 4. There is no chain folding device, so the chain is easy to fall off when it is folded

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