小型活动式起重提升机的总体结构设计 毕业设计论文.doc

小型活动式起重提升机的总体结构设计 摘要：提升机是大型固定机械之一,主要用于各种重物的升降和输送.小型提升机在日常生活中也起着重要的作用。提升机由电动机和减速器以及滚筒三部分成,各部分之间分别由联轴器联接。电动机是动力源,减速器是传动系统,滚筒为执行和控制部分,其中以减速器最为重要。它采用准平行环面蜗杆。这种蜗杆不需要修形就能达到直廓环面蜗杆修形的效果,而且瞬时接触线和相对运动速度方向夹角稳定,接近90度;蜗齿面是用铲背滚刀加工而成,因此蜗轮齿面接触面大,质量稳定。同时参加啮合的齿轮齿数多,蜗轮齿面无脊线,传递运动时不会产生干涉。因此,这种蜗杆传动承载功率大,动压油涵稳定传动、噪声低、平衡温度低等特征。具有良好的实用价值和经济价值。The design of small-scale and movable hoist Abstract:The lifting machine is one of the large-scale regular machinery ,sed in the rise or fall and transport of various kinds of heavy objects mainly. The small-scale lifting machine plays an important role too in daily life. The lifting machine is made up of motor , decelerator and three parts of cylinder , is linked by the shaft coupling respectively between every part. The motor is the power source , the decelerator is a transmission, the cylinder , in order to carry out and control some, among them the design of the decelerator is the most important. It adopts the worm the accurate parallel ring developed . This kind of worm does not need to repair the shape to reach the worm the wide ring directly and repair the result of the shape , and is exposed to the line and relative motion tempo direction contained angle stability instantaneously , is close to 90 degrees; Carry the hobbing cutter and process with shovels but succeed the teeth of a cogwheel of snail, so contact the surface greatly the teeth of a cogwheel of snail, quality is steady. Participating in several more than gear wheel teeth that clench the teeth at the same time, there is no spine line the teeth of a cogwheel of snail , will not be produced and interfered while transmitting sports. So, this kind of worm transmission bears the weight of the power largly, move and press the oil to contain the stability transmission , low , balanced temperature low grade characteristic of noise. Have good practical value and economic worth. Key words:movable;hoist 目 录 第1章 绪论 1 1.1概述 1 1.1.1提升机载荷的种类 2 1.1.2提升机的稳定性问题 2 1.2提升机的发展 2 第2章 设计 3 2.1选题背景 3 2.2方案