Gear wheel - an indispensable part of the machine

Transfer or transformation of the movement in various mechanisms and devices occurs by means of toothed or worm gears. This is the most common method in modern engineering and designing various instruments.

The Main element or worm gear is a toothed wheel. More simple and economically feasible alternative to such design invention of the modern engineers have not yet found. Converters of movements that use the gear, reliable and durable in operation, compact and have high efficiency. This type of transmission can transmit considerable power despite its simplicity to use.

However, the production of gear wheels requires high precision. With the wrong calculations and errors in the design or if the wrong installation of these parts exploitation leads to rapid wear and breakage of equipment, the emergence of excessive noise and destructive vibration.

In modern equipment and machinery as the main material for the production of parts usually use different kinds of superior, specially treated steels, which have long established themselves as durable, wear-resistant material. However, the advanced technology of Western and domestic manufacturers allow us to replace metal alloys, lighter plastics and composites.

A Toothed wheel, in the manufacture of which used a PCB, polyurethane, nylon or plastic drevesnosloistyj, will facilitate the design, to avoid vibration or additional noise and rattling. In the mechanisms, which do not require the transmission of large loads, the plastic will be more reliable and durable. The use of gears from these materials will cost much cheaper. And excellent anti-corrosion properties prolong the lifetime of the part.

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The Classification of these elements is made depending on the location of their axes, method of gear design and the shape of the profile. Distinguish between spur, helical and herringbone wheel with external or internal gearing, bevel gears, spur, worm and helical gears.

Each gear mechanism can be rotated in the same or in the opposite direction to convert shaft rotation to linear motion through rack and pinion. Selection and calculation of a particular piece is dependent on the purpose, characteristics and types of motion.

For accurate design of the gears is necessary to perform mathematical calculations according to certain formulae, using the information from legal documentation and references for engineering. The main parameters of parts required for design are the number of teeth wheel diameter by the external protrusions and depressions, dividing the wheel diameter, tooth height, which is the sum of elevation head and the legs of the tooth, and the step gearing.

The choice of material for gears, calculate the Flexural strength of the dangerous section at the base and in the pole of meshing teeth.