Patent ID: 9441682
Filing Date: 2016-09-13
CPC Classification: F16D

Claim Text:
1. A hub assembly comprising: a hub having a passage defined axially therethrough, an axle extending through the passage; a sprocket seat connected to an end of the hub and mounted to the axle, the sprocket seat having a tubular portion extending therefrom; a first pawl unit and a second pawl respectively connected to an outside of the tubular portion, the first pawl unit having three first recesses defined axially in the outside of the tubular portion, the first recesses being located at an equal angle to each other, the first recesses forming three protrusions on the tubular portion and the protrusions being located alternatively between the first recesses, each protrusion having a first positioning groove defined therein, each first recess receiving a first pawl therein, each first pawl having a first restriction groove defined therein which communicates with the first positioning grooves, a first ring mounted to the first pawls and engaged with the first restriction grooves; the second pawl unit having three second recesses defined axially in the outside of the tubular portion, the second recesses being located at an equal angle to each other, each second recess being located next to one of the first recesses and having an angle defined therebetween, each protrusion having a second positioning groove defined therein, each second recess receiving a second pawl therein, each second pawl having a second restriction groove defined therein which communicates with the second positioning grooves, a second ring mounted to the second pawls and engaged with the second restriction grooves, and a toothed collar mounted to the tubular portion and having ratchet teeth defined therein, the first and second pawls engaged with the ratchet teeth being not simultaneously.