Patent ID: 8556055
Filing Date: 2013-10-15
Classification: F16D

Abstract:
1. A driving apparatus for a rear hub of a bicycle comprising: a hub shell that has a receiving space formed at one side of the hub shell, and the receiving space having a shaft passing therethrough, wherein the shaft has a thread section provided for a locking unit, and a plurality of wedging slots located around an inner perimeter of the receiving space, and a fixed ring is configured to tightly engage with the wedging slots and has a plurality of wedging ribs located at an inner perimeter thereof, wherein a stopping edge and a wedging groove are formed inside and outside the wedging slots respectively, and the stopping edge is formed for a bearing that is passed through by the shaft, wherein a stopping unit is formed on the side of the bearing and used to secure the bearing and the wedging groove is provided for a restricting unit; said wedging ribs of said fixed ring adapted to allow switching from a single-directional driving component to a dual-directional driving component, said single-directional driving component and said dual-directional driving component alternately placed in said hub engaged with said wedging ribs of the fixed ring, the dual-directional driving component has a penetrating hole adapted to receive the shaft, and one end of the dual-directional driving component having a plurality of conjugating ribs adapted to be engaged with the wedging ribs of the fixed ring of the hub shell, so that when the conjugating ribs of the dual-directional component are engaged with the wedging ribs and a second tooth plate on the other end of the dual-directional driving component rotates, the dual-directional driving component rotates a tire of the bicycle.