The invention discloses a bicycle frame and a bicycle. The bicycle frame comprises a front tube, a middle tube, a lower tube, a middle axle seat and a lower fork, wherein the front tube is connected to the front end of the lower tube, the lower tube, the middle tube and the lower fork are all connected to the middle axle seat, the lower tube is connected to the front side of the middle axle seat,the middle tube is connected to the top of the middle axle seat, the lower fork is connected to the rear side of the middle axle seat, the front tube, the middle tube, the lower tube, the middle axleseat and the lower fork are integrally formed in a die-casting manner, and the front tube, the middle tube, the lower tube and the middle axle seat are provided with hollow inner cavities which communicate with one another. By adopting a die-casting integral forming process, strength reduction and welding technique defects caused by welding are avoided; and besides, by forming the bicycle frame with a hollow structure at a time in a die-casting manner, the weight and forming difficulty of the bicycle frame are reduced, and the bicycle frame is very suitable for batch production of bicycles.
本发明公开了一种自行车架和自行车,包括前管、中管、下管、中轴座和下叉,所述前管连接于所述下管的前端,所述下管、中管和下叉均连接于所述中轴座,所述下管连接于所述中轴座的前侧,所述中管连接于所述中轴座的顶部,所述下叉连接于所述中轴座的后侧,所述前管、中管、下管、中轴座和下叉一体压铸成型,所述前管、中管、下管和中轴座具有互通的中空内腔。采用压铸一体成型工艺,避免了焊接造成的强度下降及焊接手法缺陷,而且压铸方式一次成型具有中空结构的车架,降低车架重量和成型难度,非常适用于批量生产自行车之中。
Bicycle frame and bicycle
一种自行车架和自行车
2020-12-08
Patent
Electronic Resource
Chinese
IPC: | B62K Fahrräder , CYCLES |
BICYCLE FRAME, BICYCLE AND METHOD OF MANUFACTURING BICYCLE FRAME
European Patent Office | 2020
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