hammaspyörävälitys

Hammaspyörävälitys is the Finnish term for gear reduction or gearing. It refers to a mechanical system that uses gears to transmit torque and modify rotational speed between two or more rotating shafts. The primary function of a gear reduction is to increase torque while decreasing rotational speed, or vice versa, depending on the gear ratio.

In a simple gear reduction, two gears with different numbers of teeth are meshed. The smaller gear, the driver, rotates the larger gear, the driven. If the driven gear has more teeth than the driver gear, the driven gear will rotate slower but with greater torque. This ratio of teeth determines the gear ratio, which is the factor by which the speed is reduced and torque is increased.

Gear reductions are ubiquitous in mechanical engineering and are found in a vast array of applications. They are essential components in transmissions for vehicles, allowing engines to operate efficiently across a range of speeds and loads. They are also used in electric motors to provide more turning force at the output shaft, in clockwork mechanisms to accurately regulate timekeeping, and in industrial machinery for heavy lifting and precise movement. The design of a hammaspyörävälitys involves careful consideration of factors such as the type of gears used (spur, helical, bevel, worm), the desired gear ratio, efficiency, and the required durability.