Bicycle hub that will not drive the pedal and will not produce noise when the hub is rotated in the backward direction
First Claim
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 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.
1 Assignment
0 Petitions
Accused Products
Abstract
A hub for a bicycle includes a shaft, a hub body, a ratchet wheel, a damper, a drive seat, a plurality of pawl members, and a plurality of elastic plates. The ratchet wheel has a plurality of oneway ratchet teeth. The drive seat has a support base which has a plurality of receiving slots. Each of the pawl members has a locking detent. Thus, when the pedal is driven backward (and the drive seat is rotated backward), each of the pawl members is fully hidden in the respective receiving slot, and the locking detent of each of the pawl members is detached from the oneway ratchet teeth constantly, so that each of the pawl members will not touch the ratchet wheel when the pedal is driven backward to prevent from incurring a noise.
18 Citations
19 Claims
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1. A hub for a bicycle, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A hub for a bicycle, comprising:
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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;
wherein;the shaft has a mediate portion provided with an enlarged stop ring and has two opposite ends each provided with an outer thread; the hub further comprises; a biasing member mounted on the stop ring of the shaft and biased between the hub body and the damper to push the damper toward the support base of the drive seat; a positioning bushing mounted between the shaft and the drive seat and having an enlarged first end abutting the stop ring of the shaft and the damper; a self-lubricating bearing mounted between the positioning bushing and the drive seat; a locking nut screwed onto the respective outer thread of the shaft and abutting a second end of the positioning bushing and the self-lubricating bearing. - View Dependent Claims (16, 17, 18, 19)
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Specification