Gears are used to transfer power from one part of the machine to another. In bicycles, for example, it's the gear that powers the rear wheel from the pedals. Similarly, in a car, gears transfer power from the crankshaft (the rotating shaft of power from the engine) to a driveshaft running under the car, which powers the wheels. We can connect any number of gears together, and they can be of different shapes and sizes. Whenever we transfer electricity from one gear to another, we can do one of two things: Gearbox Bicycle gears increase speed: If two gears are connected together, one gear is more than the second, the second The gears have to turn faster to keep up. So this arrangement means that the second wheel turns faster than one, but with less force.

Change of direction: When two gears mesh together, the second always turns in the opposite direction. So if one rotates clockwise, the second must rotate counterclockwise. We can also use specially shaped gears to turn the power of the machine through an angle. In a car, for example, the differential (the gearbox in the middle of the rear axle of a rear-wheel-drive vehicle) uses a bevel gear to turn the power from the drive shaft 90 degrees and turn the rear wheels.

A gearbox is a mechanical device used to increase/decrease torque by reducing/increasing. It consists of two or more gears, one of which is driven by a motor. The output speed of the gearbox is inversely proportional to the gear ratio. Gearboxes are often preferred in constant speed applications, such as conveyors and cranes, which can provide increased torque.

The gearbox consists of a drive gear of a certain diameter, a gear of another smaller gear connected to the drive mechanism (electric motor, wind turbine, diesel engine, etc.) (if the driven mechanism drives at a higher speed than the drive mechanism) diameter ( If the speed of the driven mechanism should be less than the speed of the driving mechanism) is connected to the driven mechanical load. Just the speed/torque increase/decrease or vice versa mechanism. This is a mechanical motor attachment.

Convert motor high speed, low torque to low speed high torque (no idle even at X-mas).

Low speed/high torque to high speed/low torque.

Sometimes a "gear head" runs on a timing belt or chain with a 1:1 gear ratio to reduce motor vibration transfer to the load. Often overlooked - the gear head reduces the motor inertia, as a ratio of the motor's gear ratio squared. E.g. If we install a gearhead with a 4:1 ratio, 2000 rpm will harmonize to 500 rpm, but the load inertia will be reduced by a factor of 16.

If a worm gear is used, the system will automatically lock the mechanism (we cannot move the load until the motor spins).

There are others that have their own unique characteristics (eg, ballscrews that are also gearheads, but we don't usually call them gearheads). Also note that the gears don't run for free, which means we're putting out less power, which means the gears have some efficiency. There are various types of gearheads: spur, planetary, one-stage, multi-stage, harmonic, spur layman, (cycloid), worm, etc. and combinations of the above, but this is a whole, separate science.