A bicycle crank assembly includes a rotatable crankshaft mounted on a frame of a bicycle, and a slidable carrier shaft mounted on the crankshaft, the carrier shaft being arranged to slide relative to the crankshaft in a direction substantially parallel to a central longitudinal axis of the crankshaft. The crank assembly also includes an elliptical sprocket mounted on the carrier shaft. And the elliptical chain wheel rotates along with the rotation of the crankshaft, so that the bicycle advances. The start time of the elliptical sprocket power stroke is varied by the sliding of the carrier shaft relative to the crankshaft.
自行车曲柄组件包括安装在自行车的框架上可转动的曲柄轴,以及安装在曲柄轴上可滑动的承载轴,承载轴设为在与曲柄轴的中心纵轴基本平行的方向上相对于曲柄轴滑动。曲柄组件还包括安装在承载轴上的椭圆链轮。椭圆链轮随曲柄轴的转动而转动,以使自行车行进。椭圆链轮动力冲程的开始时间通过承载轴相对于曲柄轴的滑动而改变。
Bicycle crank assembly
自行车曲柄组件
2025-02-18
Patent
Electronic Resource
Chinese
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |