The reducer is a part of the transmission system of washing machine, and it is designed by using the decelerating clutch. It can control and process the deceleration of the rotating equipment of the washing machine, which is a very important function for using the washing machine. For example, when you need to stop the washing machine and take out the clothes after washing the washing machine or removing the water, the function of the reducer is very important. Therefore, the reducer is an important device on the washing machine. There are many kinds of reducers. The reducer of planetary gear train has many advantages, such as its high efficiency, small size and light weight. It can accomplish many tasks that ordinary reducers can't. Therefore, the reducer of planetary gear train is gradually widely used. However, its mechanical structure is more complicated, its construction accuracy is more powerful, and its installation is more difficult. However, with the progress of science and technology and the development of society, people's knowledge of planetary gear reducer is getting better and better, which makes its mechanical structure and function constantly optimized and improved, and becomes the mainstream equipment type of washing machine reducer.