The invention provides a rear sprocket of a human-powered vehicle, which can inhibit the weight increase of a rear sprocket assembly and improve the strength. A ninth rear sprocket (49) of a bicycle (1) is provided with a first outer ring-shaped body (57), a plurality of first sprocket teeth (59), an inner ring-shaped body (61), a plurality of connecting arms (63), and a plurality of first rivet holes (69). Each of the plurality of connecting arms (63) has a circumferential center line (CL) with respect to the rotational center axis (X). The plurality of first rivet holes (69) are provided at least partially in the first outer annular body (57). Each of the plurality of first rivet holes (69) has a hole center axis (HC). The total number of the plurality of connecting arms (63) is different from the total number of the plurality of first rivet holes (69). At least one of the plurality of hole center axes (HC) is offset in the circumferential direction with respect to the rotation center axis (X) from each of the plurality of circumferential center lines (CL).
本发明提供一种能够抑制后链轮组装体的重量增加且提高强度的人力驱动车辆的后链轮。自行车(1)的第九后链轮(49)具备第一外侧环状体(57)、多个第一链轮齿(59)、内侧环状体(61)、多个连结臂(63)、以及多个第一铆钉孔(69)。多个连结臂(63)的每一个具有关于旋转中心轴心(X)的周向中心线(CL)。多个第一铆钉孔(69)至少部分地设于第一外侧环状体(57)。多个第一铆钉孔(69)的每一个均具有孔中心轴心(HC)。多个连结臂(63)的总数与多个第一铆钉孔(69)的总数不同。多个孔中心轴心(HC)的至少一者从多个周向中心线(CL)的每一个向关于旋转中心轴心(X)的周向偏移。
Rear sprocket of human-powered vehicle and rear sprocket assembly of human-powered vehicle
人力驱动车辆的后链轮及人力驱动车辆的后链轮组装体
2023-12-29
Patent
Electronic Resource
Chinese
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