目前,日本貨车的时速一般分为75公里、85公里和100公里等三种系列。考虑到今后各干线貨运量的需要,有必要发展时速为95公里和110公里的两种系列。为适应这种高速貨车的要求.转向架可分別采用空气弹簧和金属弹簧。在一般情况下,除要求减轻自重和增加载重外,从降低成本来看,最好采用金属弹簧。日本现有金属弹簧的貨车 At present, the Japanese truck speed is generally divided into three series of 75 kilometers, 85 kilometers and 100 kilometers. Taking into account the future needs of trunk cargo traffic, it is necessary to develop two series of speeds of 95 kilometers and 110 kilometers per hour. In order to meet the requirements of such high-speed trucks, the bogies can be air springs and metal springs respectively. Under normal circumstances, in addition to the request to reduce the weight and increase the load, in terms of reducing costs, the best use of metal springs. Japan’s existing metal spring truck