Mechanical gear related instructions

Mechanical gears are widely used, such as engine gears, machine tool gears, reducer gears, transmission gears, coal mine machinery gears, oil pump gears, textile machinery gears, construction machinery gears, agricultural machinery gears, and so on.

Mechanical gearThe main function is to help us transmit the movement of objects and also help us transmit power.In the transmission process, the requirements for gears are also very high. It is necessary to ensure that the gears run smoothly and have sufficient load-bearing capacity to bear the weight of the object.

The most common mechanical gears areInvolute cylindrical gear, Followed by bevel gears and other products.Gear is a commonly used transmission part. Products with different shapes and types can achieve different transmission effects. Different types of gears are used in different environments.

Mechanical gear classification:

1. Divided by product type:

Gears can be divided into spur gear transmission, helical gear transmission, bevel gear transmission and herringbone gear transmission.

2. According to the relative position of the axle, it can be divided into:

Plane gear mechanism; spur gears; external meshing gears; internal meshing gears; rack and pinion gears; helical cylindrical gears; herringbone gears; space gears; bevel gears; cross-axis helical gears; worm gears, etc.

3. According to the type of gear device, it can be divided into:

There are three types of open gear drive, semi-open gear drive and closed gear drive.Click on the article about the difference between them"Open gear"View related instructions.

Features of mechanical gears:

1. High transmission efficiency.

Gear transmission is the most efficient of all mechanical transmissions, and the general efficiency can reach 99%, so it is widely used.

2. Save space.

The space required between the gear transmission chain and the gear transmission ratio belt is small, and the compact structure saves the space occupied by the gear.

3. The transmission ratio is stable.

A stable transmission ratio is the basic requirement for gear transmission applications, and it is also a guarantee for gear transmission.

4. Long service life.

The gears require high precision in the design and production process, and the workmanship is excellent, which makes the gears have a longer service life.

Material selection requirements for mechanical gears:

1. To ensure that the work requirements are met, how much strength and power needs to be transmitted.

2. Consider the size of the gear, the rough forming method and the heat treatment process.

3. Factors such as the place of use of the gear, its service life and the cost of making gears must be considered comprehensively.

4. Generally used gear materials include forged steel, carbon steel, cast steel, alloy steel, cast iron and non-metallic materials.

Mechanical gear selection needs to provide product type, accuracy requirements, material, modulus, number of teeth, pressure angle and other parameter requirements. According to actual application requirements, select blackening, tooth hardening, high-frequency quenching and other treatments.In the transmission process of the gear, repeated friction occurs between the tooth surfaces, which not only consumes energy, but also wears the gear.

Therefore, usually gears are lubricated with lubricating oil or grease before and during use, which not only reduces energy loss, but also reduces gear wear and prolongs the service life of gears.But gears used in different occasions use different types of lubricating oil.

Mechanical gear transmission has a long history, if you don’t know, you can click on the article previously published by the editor "Gear development history"See related instructions. For more questions or related needs, you can consult EP for free.