| 摘要 |
A handlebar for a motorcycle or similar vehicle comprises at least one outer tubular sleeve surrounding an inner tubular member which is of constant diameter and constant wall thickness throughout. Both the outer sleeve and the inner member have a central region, flanked by symmetrical oblique regions, leading to respective handgrip regions. The multi-layer construction of the handlebar limits crack propagation and allows use of two or more different materials. With a two-layer construction, the outer tubular sleeve is preferably of constant wall thickness in its central region and of constant, yet smaller wall thickness in the handgrip regions, with a reduction in wall thickness taking place over a very short distance in the intermediate oblique regions. With a three-layer construction, the outer layers may each be of constant wall thickness, the outermost layer(s) not extending to the ends of the adjacent inner layer.
|
