The invention discloses a middle driving mechanism. The mechanism is used for a power-assisted bicycle and comprises a middle shaft, a chain wheel and a motor; the middle shaft is inserted into a shaft hole of a middle frame of the power-assisted bicycle; an auxiliary gear sleeves the middle shaft in a fixed manner; the chain wheel comprises an installation part located in the center and a tooth part fixed to the periphery of the installation part; the installation part protrudes in an axial direction and forms a containing cavity; the tooth part is located at the end, close to the frame, of the installation part in an axial direction; the installation part sleeves the middle shaft and is fixedly connected with the auxiliary gear; the auxiliary gear is positioned in the containing cavity;and the motor is assembled on the frame and drives the auxiliary gear to rotate through a speed reduction assembly. In the middle driving mechanism, the tooth part in the chain wheel achieves the effect of crossing the auxiliary gear to be close to the frame, so that the distance between the tooth part and the frame is effectively shortened, and therefore, the distance between a chain and the frame will not be too long. The invention further discloses a power-assisted bicycle. The power-assisted bicycle is provided with the middle driving mechanism, so that the distance between the chain and the frame will not be too long.
本发明公开了一种中置驱动机构,用于助力自行车,包括中轴、牙盘和电机;中轴插装在助力自行车中车架的轴孔处;中轴上套装并固定有辅助齿轮;牙盘包括位于中心位置的安装部和固定于安装部外周的齿部;安装部沿轴向凸出并形成容纳腔,齿部位于安装部沿轴向靠近车架的一端;安装部套装在中轴上,并与辅助齿轮固定连接;辅助齿轮位于上述容纳腔内;电机装配在车架上,且电机通过减速组件驱动辅助齿轮转动。该中置驱动机构中,牙盘中齿部达到越过辅助齿轮贴近车架的效果,有效缩短齿部与车架的距离,防止链条与车架之间的距离过远。本发明还公开一种助力自行车,其应用上述中置驱动机构,避免链条与车架距离过远。
Middle driving mechanism and power-assisted bicycle
中置驱动机构和助力自行车
2020-06-23
Patent
Electronic Resource
Chinese
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
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