Patent ID: 8276731
Filing Date: 2012-10-02
Classification: B60B,F16D,Y10T

Abstract:
1. 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 drive seat rotatably mounted on the shaft and having an end face provided with a plurality of drive blocks each having a surface provided with an oblique driving slot; a support ring secured on the drive seat and protruding from the drive blocks; a rotation ring mounted on the support ring and having a periphery provided with a plurality of receiving slots; a plurality of pawl members each pivotally mounted in a respective one of the plurality of receiving slots of the rotation ring to releasably mesh with the oneway ratchet teeth of the ratchet wheel and each having a side provided with a guide post which is movable in the driving slot of a respective one of the plurality of drive blocks; a stop bushing mounted on the shaft; a limit ring mounted on the stop bushing and attached to the rotation ring to rotate in concert with the rotation ring; and a damper mounted on the stop bushing and pressing the limit ring to damp a rotation movement of the rotation ring.