| 摘要 |
<p>An upper bearing assembly (20) for a bicycle steerer tube (10) which generally includes a lower race (21), a ball bearing (22) integral with an upper race (22a) and mounted in the lower race (21), a watertight cover (230) mounted above the ball bearing (22), a compression nut (23) mounted above the watertight cover (230), a compression washer (24) mounted around a top portion of a substantially inverted T-shaped cutout (231) of the compression nut (23), a compression cap (25) mounted above the compression washer (24) and having a skirt portion (254) surrounding the compression washer (24). The compression washer (24) includes a thinner portion (242) and a thicker portion (240) which has a substantially V-shaped groove (241) formed in an outer periphery thereof. The skirt portion (254) of the compression cap (25) has a threaded hole (250) extending obliquely therein in which a compression bolt (251) locates. The oblique threaded hole (250) aligns with the V-shaped groove (241) in the compression washer (24). When the compression bolt (251) is driven at a first end thereof (253) and is thus moved inward in the oblique threaded hole (250), the second end (252) of the compression bolt (251) contacts and compresses the compressing washer (24) at the V-shaped groove (241), the compression cap (25), the compression washer (24), the compression nut (23), and the steerer tube (10) as a whole are tightly engaged together.</p> |
