Easily Replaceable One-Way Transmission Module

摘要

A one-way transmission module includes an external ring, an internal ring and catch units. The external ring includes a non-circular external face for engagement with an internal face of a hub or a flywheel-bearing drum. The internal ring includes a non-circular internal face for engagement with an external face of the drum or the hub. An external face of the internal ring includes planar facets each comprising two terminal portions and a middle portion located further from the internal face of the external ring than the terminal portions. Each catch unit is arranged between the internal face of the external ring and a corresponding of the planar facets of the internal ring to allow the external and internal rings to rotate together in a forward direction but not allow the external and internal rings to rotate together in a backward direction.

主权项

1. A one-way transmission module comprising:
an external ring comprising:
an internal face; anda non-circular external face for engagement with an internal face of one of a hub and a flywheel-bearing drum; and an internal ring comprising:
an external face comprising planar facets each comprising two terminal portions and a middle portion located further from the internal face of the external ring than the terminal portions; anda non-circular internal face for engagement with an external face of the other of the hub and the drum; and a plurality of catch units each arranged between the internal face of the external ring and a corresponding of the planar facets of the internal ring to allow the external and internal rings to rotate together in a forward direction but not allow the external and internal rings to rotate together in a backward direction.