What's the difference between a larger transmission ratio and a smaller transmission ratio?

The difference of transmission ratio is as follows:

1, large transmission ratio: the size of the big gear is larger, so the gearbox will also become larger. The transmission system with large transmission ratio can realize self-locking, and the transmission system can prevent reverse rotation and improve the safety of transmission. The transmission system with large transmission ratio is also beneficial to oil bath lubrication, and the size difference of big gears is small, which is beneficial to the flow of lubricating oil between gears at all levels.

2. Small transmission ratio: Too small transmission ratio will reduce the deceleration efficiency. The size of low-speed gear directly affects the size and weight of reducer. The smaller transmission ratio can reduce the size and weight of the low-speed gear and its main body. Smaller transmission ratio can reduce the peripheral speed of gears in high-speed stage and subsequent stage, which is beneficial to reduce noise and vibration and improve the stability of transmission.