由于路标指示提升高度区段划分的不均匀,调换备件品种杂而且数量又多等问题,为此提出了一个双向对称传动的方法——每对变换齿轮,根据需要可作增速或减速传动。利用较少的几组变换齿轮,即可得到成倍的提升高度区段数,并且取消了原设计的蜗杆及丝杠备件,标程区段划分均匀,指示盘利用率高,使限速圆盘回转角合乎规程要求。另外,对牌坊式第一段伞齿轮对中困难提出了具体的改进方案。 Due to the unbalanced division of elevation, the variety of replacement spare parts and the large number of spare parts, a bidirectional symmetrical transmission method is proposed. Each pair of change gears can be used for increasing or decreasing transmission as required. The use of fewer sets of change gear, you can get double the number of lifting height section, and canceled the original design of the worm and screw spare parts, the division of the standard section, the indicator disk utilization, the speed limit disk Slewing angle in line with the requirements. In addition, the first paragraph of the arch-style bevel gear alignment difficulties put forward specific improvements.