In a cotton picker, bevel gears are commonly used in various components such as the gearbox drivetrain, or other mechanisms to enable specific movements and operations required for harvesting cotton. Some of the key functions of bevel gears in a cotton picker may include:

1. Transmitting power: Bevel gears are used to transfer power from the engine to various parts of the cotton picker, such as the harvesting mechanisms, spindles, or other moving components.

2. Changing the direction of rotation: By using bevel gears, the direction of rotation can be changed within the machine, allowing for the power to be transferred efficiently to different components at right angles to each other.

3. Facilitating smooth operation: Bevel gears help in ensuring the smooth and efficient operation of the cotton picker by maintaining the correct speed and torque levels in different parts of the machine.