我们要购买减速机的首要步，首先要确定一点，我们购买的目的。对于减速机的分类，细化开来，有摆线针轮减速机，行星齿轮减速机和蜗轮蜗杆减速机等。还有使用较少的谐波齿轮减速机、滚子凸轮减速机、超环面蜗杆减速机等等。

We want to buy the first step of the reducer, first of all to determine a point, the of our purchase. For the reducer of classification, refined, there are cycloid gear reducer, planetary gear reducer and worm gear reducer and so on. There are also less harmonic gear reducer, roller cam reducer, toroidal worm reducer and so on.

允许输入法兰：

不能大于或小于临级减速机的标准尺寸，如减速机PLE80?的标准法兰为80mm,其临级的减速级是PLE60?和PLE120，PLE80?允许法兰不应小于60mm,也不能大于120mm。

Allow input flange

It can't be greater than or less than the standard of the reducer. For example, the standard flange of reducer PLE80 is 80mm, and the deceleration stage of its reducer is PLE60? PLE120, PLE80?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。 The maximum allowable flange should not be less than 60mm, nor greater than 120mm.

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.

齿轮声辐射特征分析 在选择用不同结构形式的齿轮时，对其特定结构建立声辐射模型，进行动力学分析，对齿轮传动系统噪声进行预先评估。以便根据使用者的不同要求（使用场所，是 否无人操作，是否在城区内，地上、地下建筑物有无特定要求，是否有噪声防护，或无其他特定要求）去满足。减速机内部齿轮宽度在减速机传动空间允许时，增加齿轮宽度，可以减少恒定扭矩下的单位负荷。

The acoustic radiation characteristic analysis of gear in the selection of gear with different structure forms, set up the acoustic radiation model to its specific structure, carry on the dynamic analysis, and evaluate the gear tran***ission system noise in advance. In order to meet the users' requirements (use sites, unmanned operati, whether there are specific requirements in the urban area, ground or underground buildings, noise protection, or other specific requirements).