Revision Sets & Bearings

Transmission Accessories: Important Information for Scooters

Transmissions play a crucial role in the performance of scooters and other vehicles. They ensure that the power of the engine is efficiently transferred to the wheels. In this SEO text, we discuss the five main mechanical transmissions, how to calculate transmissions, and what direct transmission means.

What are the 5 main mechanical transmissions?

There are different types of mechanical transmissions used in vehicles such as scooters. The five most important are:

1. Gear transmission: This type of transmission uses gears to transfer the movement. It is often used in the transmission of vehicles, including scooters.
2. Belt transmission: In scooters, the belt is often used in the variation system to smoothly transfer the power of the engine to the rear wheel.
3. Chain transmission: This transmission is common in motorcycles and some scooters, where a chain transfers the power from the engine block to the rear wheel.
4. Worm gear transmission: This type is often used in applications where a large speed reduction is needed. It offers a high ratio with compact dimensions.
5. Drum or disc brake transmission: Although it is technically a braking system, it uses mechanical transmissions to stop or slow down the wheels.

How do you calculate transmissions?

To calculate a transmission ratio, you divide the number of teeth of the driven gear by the number of teeth of the driving gear. The formula for a gear transmission is:\text{Transmission ratio} = \frac{\text{Teeth driven gear}}{\text{Teeth driving gear}}}Transmission ratio=Teeth driving gear Teeth driven gear​

The same principle applies to belt or chain transmissions: the ratio between the size of the driving wheel and the driven wheel determines how power and speed are transferred. A higher ratio means more power but less speed, while a lower ratio provides more speed with less power.

What is direct transmission?

Direct transmission, also called direct drive, means that there is a 1:1 ratio between the power source and the driven part. This means that the driving wheel and the driven wheel rotate at the same speed without speed reduction or acceleration. Direct transmission is used when the engine directly transmits the speed and power to the wheels, without an extra mechanical system in between to adjust the ratio.