| 摘要 |
The subject invention discloses a type of hub structure, comprising mainly the clutch mechanism that is composed of a clutch and the ratchet teeth of the bearing housing inside the hub, so that the whole unit can independently perform a single-direction brake function without additional components as in conventional structures. With its high compatibility of components, only the chain wheel support has to be replaced in case of additional function of multi-step speed changes without replacing many components as in conventional structures, which would result in higher assembling costs. Under the trend of everchanging bicycle specifications, it will reduce the change of measurements of relevant components, thus reducing the production costs.
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