The invention discloses a bicycle speed change mechanism which comprises a power input mechanism and a clutch mechanism. The power input mechanism comprises a middle axle and a driving wheel set; the driving wheel set comprises a change wheel and a fixed wheel, the change wheel and the middle axle are coaxially arranged, the transmission ratio of the fixed wheel is lower than that of the change wheel, the fixed wheel is fixedly connected with the middle shaft, and the change wheel can rotate relative to the middle shaft; and the clutch mechanism comprises a synchronous structure arranged on the change wheels and a blocking mechanism capable of rotating along with the middle axle, and the blocking mechanism can block or give way to the synchronous structure on the change wheels during rotation through movement. The bicycle speed change mechanism is simple in structure and low in manufacturing cost, through cooperation of the blocking mechanism and the synchronous structure in the clutch mechanism, the change wheels and the middle axle are made to be synchronous or separated, when passing power is input into the middle axle, switching between the fixed wheel and the different change wheels is achieved, and then the transmission ratio is changed for speed changing.
本发明公开了一种自行车变速机构,包括动力输入机构,其包括中轴;以及主动轮组,所述主动轮组包括变速轮和一个固定轮,所述变速轮均与所述中轴同轴设置,所述固定轮的传动比小于所述变速轮的传动比,所述固定轮和所述中轴固定连接,所述变速轮可相对所述中轴转动;以及离合机构,其包括设置于各所述变速轮上的同步结构,以及可随所述中轴转动的阻挡机构,所述阻挡机构通过活动可在转动时对所述变速轮上的所述同步结构进行阻挡或让位。本申请结构简单、造价便宜,通过离合机构中的阻挡机构和同步结构配合,从而使变速轮与中轴同步或分离,实现中轴输入通过动力时,在固定轮和不同变速轮之间的切换,进而改变传动比进行变速。
Bicycle speed change mechanism
一种自行车变速机构
2021-10-01
Patent
Elektronische Ressource
Chinesisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
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