An electric power assisting unit of a bicycle is miniaturized. The electric power assist unit is provided with: a plurality of sun gears which have mutually different numbers of teeth and into which a driver's pedal depression force is selectively input; a first planetary gear having a tooth surface that meshes with each of the plurality of sun gears; an electric motor that generates a driving force that assists the pedaling force of the pedal; a sun gear different from the plurality of sun gears to which the driving force from the electric motor is input; a second planetary gear that revolves and rotates integrally with the first planetary gear and meshes with a sun gear different from the plurality of sun gears; a ring gear provided so as not to rotate and meshing with the second planetary gear; a carrier that supports the first planetary gear and the second planetary gear; and a housing coupled to the carrier and transmitting at least one of the pedal pedaling force and the driving force to a driving wheel.
将自行车的电动助力单元小型化。电动助力单元具备:多个太阳齿轮,其具有相互不同的齿数并选择性地输入驾驶员的踏板踏力;第一行星齿轮,其具有与所述多个太阳齿轮分别啮合的齿面;电动马达,其产生助力所述踏板踏力的驱动力;太阳齿轮,其与输入来自所述电动马达的所述驱动力的所述多个太阳齿轮不同;第二行星齿轮,其与所述第一行星齿轮一体地公转以及自转,并和与所述多个太阳齿轮不同的太阳齿轮啮合;齿圈,其设置为不能旋转并与所述第二行星齿轮啮合;行星架,其对所述第一行星齿轮和所述第二行星齿轮进行支承;壳体,其与所述行星架连结并将所述踏板踏力和所述驱动力中的至少一个传递至驱动轮。
Electric power assisting unit of bicycle and electric power assisting bicycle
自行车的电动助力单元以及电动助力自行车
11.03.2025
Patent
Elektronische Ressource
Chinesisch
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