In the calculation of the design of the gear transmission ratio, why not round?
3) the transmission ratio is not integral, which means that more gear teeth have a chance of engaging each other, which can prolong the life of the gear.4) if possible, design the number of teeth of a gear as "odd numbers", and each tooth has an opportunity to mesh with each other.Under special circumstances, the transmission ratio can only take integer argument. Not at all.
1) the transmission ratio takes an integral number, and when the gear teeth are turned into a plurality of times, the original gear teeth are meshed with each other, and the teeth are prone to fatigue pitting. In particular, 1 - 1 is always used to mesh the teeth properly.2) the gear can not be installed in the ideal position, and the machining accuracy can not be idealized. A fixed gear engagement also means that the force is periodically changed, too.
There is no such hard rule, but, if possible, the drive ratio is not as rounded as possible. The reason is:
