近几年来,国内摩托车行业的发展风起云涌,十分迅速,但其技术主要是引进、消化和吸收日本技术。其中从日本铃木体系引进的技术,在发动机设计中箱体轴承孔与轴承的配合基本上都是过盈配合,其装配是利用了热胀冷缩的原理,把轴承放到液化氮里冷却,使其尺寸参数缩小,把与箱体的过盈配合转变为间隙配合,然后把冷却缩小了的轴承装进 In recent years, the domestic motorcycle industry surging, very rapid, but its technology is mainly the introduction, digestion and absorption of Japanese technology. Which imported from Japan Suzuki system technology in the engine design box bearing bore and bearing are basically interference fit, the assembly is the use of the principle of thermal expansion and contraction, the bearing placed in liquefied nitrogen cooling, The size of the parameters to reduce the interference with the box into the gap with the match, and then reduce the bearing cooling into