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小型螺旋千斤顶设计
摘要：机械设计在国民经济发展中起着重要的作用，机械工业担负着为国民经济部门提供各种性能先进，价格低廉，使用安全可靠，造型美观的技术装备的任务，在国家现代化建设中举足轻重。机械产品的市场竞争能力主要取决于产品的质量，而产品的质量又取决于产品的设计。螺旋千斤顶主要由螺杆、手柄、底座、螺套、旋转杆、挡环、托杯等零部件组装而成。它是一种小型的起重设备，体积小方便携带，造价成本低，在日常生活中被广泛应用。本课题从小型螺旋千斤顶结构与工作原理的分析，按要求对参数进行选择，按参数进行设计、校核四个方面逐步阐述千斤顶设计的全过程。运用已掌握的结构原理知识、机械设计与制造理论及计算公式、机械加工工艺，确定了整个千斤顶各个零件的几何尺寸，确保了千斤顶的质量和强度。
关键词：千斤顶；螺旋千斤顶；小型千斤顶；CAD；Proe
Design of small screw jacks
Absrtact： mechanical design plays an important role in the development of national economy，and the mechanical industry is responsible for providing various technical equipment with advanced performance，low price，safe and reliable use and beautiful shape for the national economic department，which plays an important role in the national modernization construction. The market competitiveness of mechanical products mainly depends on the quality of products，and the quality of products depends on the design of products. The screw Jack is mainly composed of screw，handle，base，screw sleeve，rotating rod，retaining ring，supporting cup and other parts. It is a small lifting equipment，small and convenient to carry，low cost，widely used in daily life. In this paper，the whole process of jack design is described from four aspects： analysis of structure and working principle of small screw jack，selection of parameters according to requirements，design and check of parameters. Using the knowledge of structure principle，mechanical design and manufacture theory and calculation formula，machining technology，the geometric dimensions of each part of the whole Jack are determined，and the quality and strength of the Jack are ensured.
Keywords： Jack；Spiral Jack；Small Jack；CAD；Proe
目 录
4.2.4螺母外径和凸缘强度的计算及螺母悬置部分拉——扭组合校核23
