在齿轮传动中,齿轮副的齿间需留有间隙,以保证齿轮副在传动过程中的灵活性。齿轮副的侧隙是通过齿轮的侧隙来保证的。为了保证齿轮的侧隙,在齿轮加工中必须严格控制齿厚的加工尺寸,在生产中经常采用的方法是固定弦齿厚测定法、公法线长度测定法或量柱测量距测定法。本文主要阐述齿轮固定弦齿厚、公法线长度及量柱测量距的计算方法。 In the gear transmission, the gear pair should be left in the gap between the gear to ensure that gear in the transmission process flexibility. The gear backlash is guaranteed by the backlash of the gear. In order to ensure the gear backlash, gear machining must be strictly controlled tooth thickness of the processing size, often used in production methods are fixed chord thickness measurement method, the length of the test method for measuring the public or the amount of column distance measurement method. This paper mainly elaborates the method of calculating the fixed gear tooth thickness, the length of common normal and the measuring distance of measuring column.