The invention provides a rear sprocket of a human-powered vehicle capable of reliably engaging a drive chain with a downshift start tooth during a downshift operation. An eighth rear sprocket (48) of a bicycle (1) is provided with a plurality of sprocket teeth (52). The plurality of sprocket teeth (52) have a plurality of downshift promoting teeth (53). The plurality of downshift promoting teeth (53) have downshift recess teeth (55) and downshift starting teeth (56). The downshift recess tooth (55) has a downshift recess (59) and a protrusion (60). The downshift recess (59) reaches a recess tooth non-driving surface (58) of the downshift recess tooth (55). The protruding portion (60) is at least partially disposed radially outward of the downshift recess (59). The drive chain (3) is first engaged with the downshift start teeth (56).
本发明提供一种能够在降挡动作中使驱动链条可靠地与降挡开始齿卡合的人力驱动车辆的后链轮。自行车(1)的第八后链轮(48)具备多个链轮齿(52)。多个链轮齿(52)具有多个降挡促进齿(53)。多个降挡促进齿(53)具有降挡凹部齿(55)和降挡开始齿(56)。降挡凹部齿(55)具有降挡凹部(59)和突出部(60)。降挡凹部(59)到达降挡凹部齿(55)的凹部齿非驱动面(58)。突出部(60)至少部分地配置于比降挡凹部(59)更靠径向外侧处。驱动链条(3)最先与降挡开始齿(56)卡合。
Rear chain wheel of human-powered vehicle
人力驱动车辆的后链轮
2024-03-29
Patent
Electronic Resource
Chinese
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
Rear chain wheel for human-powered vehicle and rear chain wheel assembly for human-powered vehicle
European Patent Office | 2023
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