The invention provides a welding-free bicycle frame. The welding-free bicycle frame comprises an upper pipe, a vertical pipe, a lower pipe, a vertical fork and a flat fork, wherein the frame is provided with following connection connectors including a middle connector for connecting one end of the vertical pipe, one end of the lower pipe and one end of each of two small pipes of the flat fork, a front connector for connecting one end of the upper pipe and one end of the lower pipe, an upper connector for connecting one end of the vertical pipe, one end of the upper pipe and one end of each of of two small pipes of the vertical fork, and rear connectors which are connected with the vertical fork and one end of each of two small pipes of the vertical fork and the flat fork; bamboo joint plugs are arranged at the two ends of the upper pipe, the vertical pipe, the two small pipes of the vertical fork and the two small pipes of the flat fork; the middle connector, the front connector, the upper connector and the symmetrical rear connectors are provided with inner bamboo joint inserting openings which are tightly connected with the bamboo joint plugs of the corresponding pipe bodies respectively; an adhering layer is arranged between the inner bamboo joint inserting opening and the bamboo joint plug of each connection connector. Each pipe body of the frame is inserted and fixed with the corresponding connection connector provided with the inner bamboo joint inserting opening through the corresponding bamboo joint plug, so that a traditional welding opening is saved and the whole shape of the frame can be easily changed, such as a streamline form; a frame machining process is simpler.
Welding-free bicycle frame
2015-08-19
Patent
Electronic Resource
English
IPC: | B62K Fahrräder , CYCLES |
BICYCLE FRAME, BICYCLE AND METHOD OF MANUFACTURING BICYCLE FRAME
European Patent Office | 2020
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