Normally closed soundless bicycle hub
AssigneeChosen Co., Ltd.
InventorChing-Shu Chen
Life of this patent
Estimating the term…
Abstract
A hub for a bicycle includes a shaft (12), a hub body (40), a ratchet wheel (43), a drive seat (10), a support ring (15), a rotation ring (21), a plurality of pawl members (22), a stop bushing (121), a limit ring (30) and a damper (33). Thus, when the drive seat is rotated backward by the pedal, each of the pawl members is retracted into the respective receiving slot (212) of the rotation ring to disengage the oneway ratchet teeth (42) of the ratchet wheel, so that each of the pawl members is spaced from and will not touch the ratchet wheel when the pedal is driven backward to prevent from producing a noise when the pedal is driven backward.
Claims17
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.
Dependencies are inferred from the claim text.