The invention provides a rear chain wheel for a human-powered vehicle and a rear chain wheel assembly for the human-powered vehicle, which can ensure the speed change performance of the rear chain wheel. The rear sprocket includes a sprocket body, a plurality of sprocket teeth, and a plurality of fastening holes, each of the plurality of fastening holes is configured to receive a fastening member that fastens the rear sprocket and an adjacent sprocket to each other, two first adjacent fastening holes among the plurality of fastening holes are disposed at a first pitch circle angle in a circumferential direction with respect to a rotational center axis, and two second adjacent fastening holes among the plurality of fastening holes are disposed at a second pitch circle angle in a circumferential direction with respect to the rotational center axis. Two second adjoining fastening holes of the plurality of fastening holes are arranged at a second pitch circle angle in the circumferential direction, the second pitch circle angle being different from the first pitch circle angle, and two third adjoining fastening holes of the plurality of fastening holes are arranged at a third pitch circle angle in the circumferential direction, the third pitch circle angle is different from each of the first pitch circle angle and the second pitch circle angle.
本发明提供一种能够确保后链轮的变速性能的人力驱动车用后链轮及人力驱动车用后链轮组件。后链轮具备链轮体、多个链轮齿以及多个紧固孔,多个紧固孔的每一个构成为,承接将后链轮与邻接链轮彼此紧固的紧固部件,多个紧固孔中的两个第一邻接紧固孔在关于旋转中心轴心的周向上以第一节圆角度配置,多个紧固孔中的两个第二邻接紧固孔在周向上以第二节圆角度配置,第二节圆角度与第一节圆角度不同,多个紧固孔中的两个第三邻接紧固孔在周向上以第三节圆角度配置,第三节圆角度不同于第一节圆角度及第二节圆角度中的每一个。
Rear chain wheel for human-powered vehicle and rear chain wheel assembly for human-powered vehicle
人力驱动车用后链轮及人力驱动车用后链轮组件
2023-12-08
Patent
Electronic Resource
Chinese
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
HUMAN-POWERED DRIVEN VEHICLE REAR SPROCKET AND HUMAN-POWERED DRIVEN VEHICLE REAR SPROCKET ASSEMBLY
European Patent Office | 2023
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