Patent ID: 7938242

Claim:
A hub for a bicycle, comprising: a shaft; a hub body rotatably mounted on the shaft; a ratchet wheel secured in the hub body to drive the hub body to rotate relative to the shaft and having an inner wall provided with a plurality of oneway ratchet teeth; a damper mounted between the shaft and the hub body and having a periphery provided with a plurality of oblique guide slots; a drive seat rotatably mounted on the shaft and having a support base which is rotatable in the ratchet wheel and has a periphery provided with a plurality of receiving slots; a plurality of pawl members each pivotally mounted in a respective one of the receiving slots of the support base of the drive seat and each having a side provided with a guide post which is movable in a respective one of the oblique guide slots of the damper to drive each of the pawl members to move between a first position where each of the pawl members meshes with the oneway ratchet teeth of the ratchet wheel so that the ratchet wheel is combined with and rotatable with the support base of the drive seat and a second position where each of the pawl members is detached from the oneway ratchet teeth of the ratchet wheel so that the ratchet wheel is released from and non-rotatable with the support base of the drive seat; a plurality of elastic plates each pivotally mounted on the support base of the drive seat and each pressing a respective one of the pawl members to detach the respective pawl member from the oneway ratchet teeth of the ratchet wheel at a normal state.