最近,日本铁道综合技术研究所试制了新一代转向架——“无侧架转向架”。该转向架的结构特点是:轴箱弹簧与横梁直接结合,通过采用玻璃钢制弹簧和铝制横梁实现了大幅度轻量化。另外,左右车轮通过差动齿轮组合的齿轮箱和轴承各自旋转,使之提高曲线区间的速度和防止蛇行运动。轴箱弹簧采用“鼓形”的,以减弱由于在曲线区间离心力作用使轴箱弹簧向外侧伸长时轮-轨间的阻力。 Recently, the Japan Railway Institute of integrated technology trial of a new generation of bogies - “no side frame bogie.” The bogie’s structural features are: axle box spring and beam directly, through the use of FRP spring and aluminum beams to achieve a substantial weight reduction. In addition, the left and right wheels are respectively rotated by the gearbox and the bearing assembled by the differential gear, so as to increase the speed of the curve section and prevent the meandering motion. The axlebox spring is “drum-shaped” to reduce the wheel-rail resistance when the axlebox spring is extended outward due to the centrifugal force in the curve section.