| 摘要 |
A bottom bracket assembly 100 to be mounted into a bottom bracket 33 of a bicycle comprises adapter assemblies 124A, 124B. Each adapter assembly 124A, 124B includes an adapter member 130A, 130B comprising a smaller diameter tubular portion 162A having a threaded outer peripheral surface 166A, a radially outwardly extending side wall 174A positioned in proximity to a side edge 198A of the bottom bracket 33, and a larger diameter portion 178A having an inner peripheral surface 182A and an outer peripheral surface 186A The threaded outer peripheral surface 166A of the smaller diameter 162A portion is adapted to screw into a threaded inner peripheral surface 194A of the bottom bracket 33 when the adapter assembly 124A, 124B is in the assembled state. Each adapter assembly 124A, 124B further includes a bearing unit 138A, 138B comprising an inner bearing race 212A, an outer bearing race 216A, and a plurality of ball bearings 220A disposed between the inner and outer bearing races 212A, 216A. The bearing unit 138A is mounted to the larger diameter portion 178A to be positioned radially inwardly from the inner peripheral surface 182A of the larger diameter portion 178A. The bottom bracket assembly 100 further comprises a dust tube 104 adapted to be disposed within the bottom bracket 33 so that the adapter assemblies 124A, 124B are fitted to the ends of the dust tube 104 respectively. |
