What is a gear (Gear) and how many types are there?

What is a gear?

Gear (Gear) is a piece of machinery, there are many forms, but most of them look like a circular flat plate. The edge has a pointed shape. To connect with another gear to transmit power in the form of torque (Torque) by rotating from one shaft to another shaft. which the transmission is going to happen There must be two or more gear teeth, namely the drive gear and the gear drive. Usually, the gear drive is larger than the gear drive. This type of sprocket is different from the chain sprocket (Sprocket) that uses the chain as a power transmission.

How many types of gears are there?

Spur Gears

It is a gear that is very popular in the industry. The structure is not very complicated. Characteristics of gears there. The gear teeth are parallel to the spindle. Serves to transmit power by rotating from one shaft. to another shaft It has high working efficiency and is easy to assemble. It also doesn't cause too much axial strength. And the wide area of ​​the spur gear creates more surface contact. Helps to reduce the amount of wear less. Most often used in the operation of the transmission system, such as the transmission system in the car. machinery

Bevel Gears

cone-shaped There are both straight gears (Straight Bevel Gear) and helical gears (Spiral Bevel Gear) are two gears that meet in the shaft line of both shafts. Will be perpendicular or intersecting, most of the shafts of the two gears are perpendicular to each other at an angle of 90 degrees, effective in use and high power transmission Examples of applications include motor vehicles, especially in transmission and propulsion systems, tractors used in ship transmission systems.

Rack Gears

This type of gear consists of two parts: The drive gear has a circular shape. and the bridge gear is a long, straight rod Serves to change the direction of movement. or moving back and forth Bridge gears are used in automation machines such as auto parts manufacturing machines. Transmission of power in the vehicle's steering system large printers or plotters, industrial robots, etc.

Worm gears or worm gears

It is a gear that consists of a gear. and worm thread The behavior works in the form of self-locking rotation, whereby the worm gear transfers power in a slip form from the drive gear to the follow gear. Makes the operation of this type of gear quiet. and less vibration

Helical Gears

It has an oblique backlash line. An angle with the spindle will tilt to the left or right depending on the choice of use. acts like a spur gear Because the oblique angle of the gear teeth causes overlapping (Overlap) of the gear teeth while rotating. Causing while working, the sound is quieter than the spur gear and can bear more load than the spur gear.

Spiral Gears

oblique gear or helical gear similar to a worm gear Used to transmit power between shafts at a right angle of 90 degrees, commonly used to change the direction of power transmission of the shaft. This type of gear will have a slip between the surface of the pair of gear teeth used to transmit power. Therefore, it can transmit less power than a worm gear.

Herringbone gears or herringbone gears

This type of gear was developed from the helical gear. to reduce the force (Trust) on the side while working The characteristics of the gears are tilted alternately until they are shaped like serrations. The advantage of this gear is that it will not be able to move apart. It can bear more load than spur gear. make the work sound quiet less vibration

Internal Gears

It resembles a spur gear. But the teeth are located inside the ring. Used in conjunction with a small spur gear inside the ring which is smaller. Acts as a drive gear If the inner gear is much smaller than the outer gear The ratio will be very high. An example of a gear, for example, is a gear for an engine oil pump.