摘 要
  减速机一般用于低转速大扭矩的传动设备，把电动机、内燃机或其它高速运转的动力通过减速机的输入轴上的齿数少的齿轮啮合输出轴上的大齿轮来达到减速的目的，普通的减速机也会有几对相同原理齿轮达到理想的减速效果，大小齿轮的齿数之比，就是传动比。减速器是靠输出和输入的齿轮的啮合来确定输出的速度的，传动轴之间的中心距及平行度直接影响了减速器的质量好坏。支承各传动轴，保证各传动轴之间的中心距及平行度，并保证减速器部件与发动机的正确安装是减速器组装的首要要求。减速器体加工质量的优劣，将直接影响到轴与齿轮等零件相互位置的准确性及减速器总成的使用寿命和可靠性。那么对减速器的输出输入轴承支撑孔的精度要求关键。减速器箱体是典型的箱体类零件，其结构形状复杂、壁薄，外部为了增加其强度加有很多强筋。有精度要求较高的多个平面、轴承孔系、螺孔等需要加工。因为刚度较差，切削中受力受热大，易产生振动和变形。蜗轮蜗杆减速器的计算机辅助机械设计是当今设计以及制造领域广泛采用的先进技术，通过本课题的研究，进一步对这一技术进行深入地了解和学习。
关键词: 减速器; 蜗轮；蜗杆；蜗轮轴; 蜗杆轴
Abstract

    Reducer is generally used in low speed high torque transmission device, the electric motor, internal combustion engine, or other high speed operating of power on the input shaft of the reducer gear of big gear on the output shaft gear mesh less to achieve the purpose of deceleration, ordinary there is few on the same principle of gear reducer and achieve ideal reduction effect, the size of the ratio of the number of teeth on the gears, transmission ratio. Reducer is depends on the gear meshing of output and input to determine the speed of the output, center distance between shaft and parallel degree directly affect the quality of the gear reducer is good or bad. Supporting the drive shaft, ensure the center distance between shaft and parallelism, and to ensure that the correct gear reducer parts and engine installation is a primary requirement of reducer assembly. Reducer body processing quality, directly will affect the shaft and gear parts location accuracy of each other and the service life and reliability of the gear reducer assembly. So for the output of the speed reducer type bearing support hole accuracy requirement of the key. Reducer box is a typical body parts, and its complex shape, thin wall structure, external in order to increase the strength and there are a lot of strong gluten. Have higher

accuracy requirement of multiple plane, bearing hole and screw hole need to processing. Because of poor rigidity, cutting force in the heat is big, easy to produce deformation and vibration.Computer aided mechanical design of worm gear and worm gear reducer is widely used in today's design and manufacturing of advanced technology, through this topic research, further in-depth understanding of this technology and learning.
Key words:  gear reducer,； worm gear； worm,； worm wheel； worm shaft