The invention relates to a drive unit for a power-assisted bicycle and a power-assisted bicycle. In the drive unit, the housing and the rotatable shaft contain different metal materials from each other; an outer peripheral portion of the dust seal is in contact with an inner peripheral portion of an opening of the housing, the opening allowing the rotatable shaft to pass through; an outer end of an inner peripheral portion of the opening of the housing in a rotation axis direction of the rotatable shaft includes a chamfered portion whose diameter increases toward an outer side of the opening; the dust seal includes a first lip covering the chamfered portion; and the dust seal does not protrude to the outside of the outermost portion of the opening in the rotation axis direction in the rotation axis direction.
本发明涉及一种用于电力辅助自行车的驱动单元和电力辅助自行车。在驱动单元中,壳体和可旋转轴包含彼此不同的金属材料;防尘密封件的外周部分与壳体的开口的内周部分接触,开口允许可旋转轴穿过;壳体的开口的内周部分的在可旋转轴的旋转轴线方向上的外端包括倒角部分,该倒角部分的直径朝着开口的外侧增大;防尘密封件包括覆盖倒角部分的第一唇缘;并且防尘密封件在旋转轴线方向上没有突出到开口在旋转轴线方向上的最外部分的外部。
Drive unit for power-assisted bicycle and power-assisted bicycle
用于电力辅助自行车的驱动单元和电力辅助自行车
2025-05-30
Patent
Electronic Resource
Chinese