Patent ID: 7997664
Filing Date: 2011-08-16
Classification: B60B

Abstract:
1. A hub for off-road motorcycle comprising: a bearing having a first portion and a second portion respectively formed on two opposite ends thereof, each of the first portion and the second portion having a connecting flange extended therefrom, each of the two connecting flanges having a plurality of arc-shaped recesses defined radially spacedly on an outer periphery thereof; a first annular element connected to the first portion, the first annular element having a first through hole defined on a centre thereof for loosely engaging with the connecting flange of the first portion, the first through hole having a plurality of arc-shaped protrusions extending radially spacedly from an inner periphery thereof, the arc-shaped recesses being in a shape approximately corresponding to the arc-shaped protrusions, an inner diameter of the first through hole being relatively larger than an outer diameter of a first connecting flange, the first annular element having a plurality of first spoke holes defined radially spacedly therein and extending through two lateral sides thereof; a second annular element connected to the second portion, the second annular element having a second through hole defined in a centre thereof for loosely engaging with the connecting flange of the second portion, the second through hole having a plurality of arc-shaped protrusions extending radially spacedly from an inner periphery thereof, the arc-shaped recesses being in a shape approximately corresponding to the arc-shaped protrusions, an inner diameter of each of the second through hole being relatively larger than an outer diameter of a second connecting flange, the second annular element having a plurality of second spoke holes defined radially spacedly therein and extending through two lateral sides thereof; and two retainers respectively connected to the first portion and the second portion for respectively abutting against the first annular element and the second annular element in place; wherein when the hub adapts to be assembled with spokes, the first annular element and the second annular element are slightly pivotally rotated relative to the bearing for adapting to easily adjustably assemble the spokes with a rim.