Introduction of gears

　　Gearboxes, also known as gear drives, have three main functions: increase the torque from the driving device (the motor) to the driven device, reduce the speed produced by the motor, and/or change the direction of the axis of rotation. The relationship between the device and the gearbox Connections can be made using couplings, belts, chains or hollow shaft connections.

　　The heart of gear transmission is the gears in it. Gears run in pairs, meshing with each other to transmit power. When power remains constant, speed and torque are inversely related. Therefore, torque increases at the same rate as speed decreases.

　　Gears According to the material from which they are made, we can divide them into two groups: metal gears and plastic gears; according to the shape of the gears, they are divided into cylindrical gears, bevel gears and worm drives.

　　A cylinder gear is a disk with teeth carved on its perimeter. There are different types of cylinder gear:

　　1. Spur gears are the most common and cheapest on the market, although they are the noisiest and cannot be used at high speeds.

　　2. The helical gear is mute, and the power transmission is more uniform and safe.

　　3. The purpose of bevel gears is to transmit motion between shafts that are at an angle to each other. These are truncated cones with teeth carved into the sides. Teeth can be straight or curved.

　　4. Worm drives are a special case of helical gears, where the pinion is a screw with a helical thread with one or more inlets. The worm can mesh with the spur gear, forming a so-called worm drive. A worm gear is a wheel with special teeth, and its concave teeth mesh better with the screw.

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