Patent ID: 7699532
Filing Date: 2010-04-20
Classification: B62M,Y10T

Abstract:
1. A bottom bracket assembly for supporting a crank axle of bicycle, comprising: a bottom bracket; two bases securely connected to two open ends of the bottom bracket and each base having a recess defined in an end thereof; two bearings having a central hole respectively received in the recesses of the two bases; two collars each having a neck which is inserted into and engaged with each central hole of the bearing corresponding thereto and each neck having a tapered inner periphery; an axle extending through the two bearings and the two collars, and two positioning rings mounted to the axle and each located to extend radially between the axle and the tapered inner periphery of the collar, each positioning ring having a tapered outer periphery which is matched with the tapered inner periphery of the collar corresponding thereto, the two positioning rings each having a longitudinal cut-off so that the two positioning rings each are a C-shaped ring.