论文部分内容阅读
1993年7月31日,美国人国自行车锦标赛上出现了一种新式自行车。它是第一辆以整块碳素纤维制成的商业山地车,重约11公斤,比金属架自行车轻1.5公斤,由于没有横梁,与常规车相比,重心降低,其后轮悬架机构的摩擦力较小。这种新自行车的车座与后轮之间没有支撑竿。除此之外,通过改变后辆固定横梁中凯夫拉尔纤维与碳素纤维的比例还可调节车架的挠性,使它最多可有5厘米的活动余地。
On July 31, 1993, a new bicycle appeared at the American National Cycling Championships. It is the first commercial mountain bike made of a single piece of carbon fiber weighing about 11 kg, 1.5 kg lighter than a metal frame bicycle. Since there is no cross member, the center of gravity is lower than that of a conventional car, and the rear wheel suspension mechanism Less friction. There is no supporting pole between the new bicycle’s saddle and the rear wheel. In addition, the flexibility of the frame can be adjusted by changing the ratio of Kevlar to carbon fiber in the rear fixed beam so that it has a maximum of 5 cm of free space.