减速机的种类：一般的减速机有斜齿轮减速机(包括平行轴斜齿轮减速机、蜗轮减速机、锥齿轮减速机等等)、行星齿轮减速机、摆线针轮减速机、蜗轮蜗杆减速机、行星摩擦式机械无级变速机等等。

Type of reducer

The general reducer has helical gear reducer (including parallel shaft helical gear reducer, worm gear reducer, bevel gear reducer, etc.), planetary gear reducer, cycloid pin reducer, worm gear reducer, planetary friction mechanical stepless speed change machine and so on.

降低减速机运转时的齿轮传动噪声已成为行业内的重要研究课题，国内外不少学者都把齿轮传动中轮齿啮合刚度的变化看成是齿轮动载、振动和噪声的主要因素。用修形的方法，使其动载荷及速度波动减至小，以达到降低噪声的目的。这种方法在实践中证明是一种较有效的方法。对减速机箱体进行共振测试，找出共振位置，增加适当的筋条（板），可以提高箱体的刚度，减少箱体的振动，实现降噪。

Reducing the gear tran***ission noise of the reducer has become research topic in the industry. Many scholars both at home and abroad regard the change of gear tooth meshing stiffness as the main factor of gear dynamic load, vibration and noise. The method of modification is used to minimize the dynamic load and speed fluctuation in order to reduce noise. This method is proved to be a more effective method in practice.

减速机内部齿轮的齿距和压力角 小齿距能保证有较多的轮齿同时接触，齿轮重叠增多，减少单个齿轮挠曲，降低传动噪声，提高传动精度。较小的压力角由于齿轮接触角和横六角空心砖模具向重叠比都比较大，因此运转噪声小、精度高。

The tooth distance of the gear in the reducer and the ***all pitch of the pressure angle can ensure that there are more teeth at the same time, the overlap of the gear is increased, the deflection of the single gear is reduced, the tran***ission noise is reduced, and the tran***ission precision is improved. The ***aller pressure angle is due to the larger contact ratio between the gear contact angle and the six corners of the hollow brick mold, so the running noise is ***all and the accuracy is high.

减速机内部齿轮齿形修整（修缘和修根）和齿顶倒角 将齿顶的齿形切削成比正确的渐开曲线略呈凸形。当齿轮齿面受外力产生变形时，可以避免对与之啮合的齿轮产生干涉，并且可以降低噪音，延长齿轮寿命。

The internal gear of the reducer is trimmed (trim and trim) and tooth top chamfering to make the tooth shape of the tooth top convex than the correct involute curve. When the gear tooth surface is deformed by external force, it can ***oid interference to the gears engaged with it, and can reduce noise and prolong the service life of gears.