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Features:

1. The instantaneous transmission ratio remains constant. The instantaneous transmission ratio of non-circular gear transmission can be designed according to the required variation law.

2. The transmission ratio range is wide and can be used for deceleration or acceleration.

3. The speed (referring to the circumferential speed of the joint) and the range of transmitted power are large, and can be used for high-speed (v>40m/s), medium speed, and low-speed (v<25m/s) transmission; The power ranges from less than 1W to 105KW.

4. High transmission efficiency. For high-precision involute cylindrical gears, the efficiency can reach over 99%.

5. Compact structure, suitable for close range transmission.

6. The manufacturing cost is relatively high. Some gears with special tooth profiles or high precision require specialized or high-precision machine tools, cutting tools, and measuring instruments, resulting in complex manufacturing processes and high costs.

7. Gears with low precision produce high levels of noise, vibration, and impact during transmission, polluting the environment.

8. No overload maintenance function.

Type:

1. According to the relative position of the two axes and the direction of the gear teeth, they can be divided into the following types:

(1) Spur cylindrical gear transmission;

(2) Helical cylindrical gear transmission;

(3) Herringbone gear transmission;

(4) Bevel gear transmission;

(5) Interlocking shaft helical gear transmission.

2. According to the working premise of gears, they can be divided into:

(1) Open type gear transmission with exposed gears cannot guarantee excellent lubrication.

(2) Semi open gear transmission, with gears immersed in an oil pool and a protective cover, but not sealed.

(3) Closed gear transmission, where gears, shafts, and bearings are all installed inside the sealed box, with excellent lubrication conditions, making it difficult for dust and sand to enter, and accurate installation,

Gear transmission has excellent working conditions and is the most widely used gear transmission.

3. Gear transmission can be classified according to the relative position of its axis

Gear transmission can be divided into cylindrical gear transmission, bevel gear transmission, non-circular gear transmission, rack and pinion transmission, and worm gear transmission according to the shape of the gears.

According to the tooth profile curve of the gear teeth, it can be divided into involute gear transmission, cycloidal gear transmission, and circular arc gear transmission. A transmission composed of two or more gears is called a wheel system. Gear transmission can be divided into ordinary gear transmission and planetary gear transmission based on whether there are gears with axial motion in the wheel system. Gears with axial motion in the wheel system are called planetary gears. Gear transmission can be divided into closed type according to its working premise

Gear transmission calculation, open and semi open transmission. Sealing the transmission within a rigid casing and ensuring excellent lubrication is called closed transmission, which is commonly used, especially for high-speed gear transmission, which must adopt closed transmission. Open transmission is exposed and cannot guarantee excellent lubrication, only used for low-speed or non primary transmission. A semi open transmission is between the two.