| 摘要 |
A ratchet hub device, which can be quickly meshed to drive a bicycle, includes a hub shell, a ratchet cylinder, and an axle. There are plural tooth sockets and two groups of receiving notches between the hub shell and the ratchet cylinder. The receiving notches of each of the two groups are arranged with an equal interval between each other. Each of the receiving notches of the one group is arranged next to one of the receiving notches of the other group. Two groups of receiving notches receive ratchet members therein and engage with the tooth sockets by turns. Thereby, when a rider re-pedals a bicycle, one group of the ratchet members engage with the near tooth sockets so as to quickly engage with the hub shell and drive the hub shell to rotate.
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