A reducer is a mechanical transmission device that converts high-speed rotating power transmission into low-speed high torque output. According to the different transmission modes and structural forms, reducers can be divided into the following types:

1. Gear reducer: Adopting gear transmission, it is divided into helical gear reducer, cylindrical gear reducer, bevel gear reducer, etc.

2. Planetary reducer: composed of planetary gears, sun gears, and internal gears, it has the characteristics of compact structure and smooth transmission.

3. Cone gear reducer: Adopting bevel gear transmission, it is divided into spur bevel gear reducer and spiral bevel gear reducer.

4. Cycloid pinwheel reducer: Adopting cycloidal pinwheel transmission, it has the characteristics of smooth transmission and low noise.

5. Worm gear reducer: Adopting worm gear transmission, it has the characteristics of large transmission ratio and compact structure.

6. Hydraulic coupling reducer: It adopts hydraulic coupling transmission and has the characteristics of smooth starting and smooth transmission.

7. Magnetic powder clutch reducer: It adopts magnetic powder clutch transmission and has the characteristics of smooth starting and smooth transmission.

8. Transmission: It adopts a combination of gear transmission and clutch transmission, which can achieve multi speed shifting.

The above are several common types of reducers, and different types of reducers are suitable for different occasions and working conditions.