-毕业设计（论文）-立式车床辅助变速箱设计.doc

2 本科生毕业设计（论文） 题 目： 立式车床辅助变速箱设计 学生姓名： 系 别： 机械与电气工程系 专业年级： 指导教师： 2014年 6 月 20 日 摘 要 The speed chang gear is one kind of the independent closed type mechanical drive which locates between the prime mover and the working machine. It can reduce the prime mover rotational speed or increase the torque. This topic according to the double-column type vertical lathe workbench speed requirements，has designed of a power auxiliary gearbox 55kW which can make workbench obtain 0.8-41.6 r/min speed between 18 levels. The auxiliary gearbox adopts the traditional gear transmission device，transmission by main, auxiliary two parts reducer. In the auxiliary transmission parts, can use double sliding gears, three-couple sliding gears, fork, hydraulic cylinder to realize its speed. Through the hydraulic oil cylinder, makes sliding gears click to different gear to realize the different reduction ratio, so as to achieve the different speed. In the overall design of the auxiliary gearbox, according to the requirement of workbench speed, firstly, we set the transmission line, and then choose different combinations of gears according to different reduction ratios, at last we draw the speed diagram. In the structure design of the auxiliary gearbox, we refered to the corresponding pictures and manual, and some important transmission parts are checked. The design total principle is causes the auxiliary gearbox in to satisfy the bearing capacity and under the intensity request condition, the structure is compact, the weight is light, the efficiency is highest, the volume is smallest, the lubrication condition is best, the cost is low, the service is convenient. Key words: double-column type vertical lathe; auxiliary gearbox; gear reducer; sliding gear 目 录 第一章 引 言 1 1.1 课题的背景和意义 1 1.2 变速器国内外发展状况 1 1.2.1 国内变速器现状 1 1.2.2 国外变速器现状 3