由于齿轮轴和轮齿不是完全刚性的,因此,在齿轮装置中,从动轴开始转动前主动轴就稍有转动。此外,当载荷迅速变化时主动轴也不会恰好与从动轴同步。这些误差通常可以忽略,因此在大多数齿轮应用上这些都被忽略。但是,在精密机械中,齿轮装置刚度必须计算出来,用以确定从动轴和主动轴的相对转动角。 Since the gear shaft and the gear teeth are not completely rigid, the drive shaft slightly rotates in the gear unit before the driven shaft starts to rotate. In addition, the drive shaft does not coincide with the driven shaft when the load changes rapidly. These errors are usually negligible and are ignored in most gear applications. However, in precision machinery, the gear unit stiffness must be calculated to determine the relative angle of rotation of the driven shaft and the drive shaft.