毕业设计----循环球式汽车方向机的总体设计

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1、1 循环球式汽车方向机的总体设计循环球式汽车方向机的总体设计 及关键零部件的设计及关键零部件的设计 专业 机械设计制造及其自动化 【摘要摘要】自从 1928 年液压助力转向器研制成功以来，液压助力的循环球式转向 器便得到广泛的应用。本文首先从转向器的历史、分类和发展等概念入手，引出 本课题所要研究的对象循环球式转向器。进而对循环球式转向器结构特点、设计 要求和作用原理进行简单的介绍。然后讲述了螺杆螺母传动副的设计、齿条齿扇 传动副的设计、转阀和箱体的设计，重点讲述了转向螺杆的设计。然后对设计出 来的转向器进行强度校核，主要是钢珠与滚道的接触应力、齿扇的弯曲应力和摇 臂轴直径的确定。最后用三维造

2、型软件 Catia 绘制转向器的总成图和装配图，至 于二维的工程图就应用专业的计算机辅助绘图和设计软件Auto/CAD 进行绘制 创建。 关键词关键词：转向器、液压助力、循环球式、转阀、螺杆。 2 Recirculating ball steering of the overall vehicle design and the design of key components 【Abstract】 Since 1928, since the successful development of hydraulic power steering, hydraulic power of the re

3、circulating ball steering has been widely used. Firstly, from the steering gear of the history, classification and development concept, leads to the topic of the object to be recirculating ball steering. Turn on the recirculating ball steering structure, design requirements and principles for a brie

4、f role. Then tells the drive screw nut vice design, fan drive gear rack pairs design, the design of rotary valve and box, highlight the shift screw design. Then out of the steering of the design strength check, mainly steel ball and the raceway contact stress, bending stress and tooth fan rocker shaft diameter determined. Finally, three-dimensional modeling software Catia drawing steering gear assembly and assembly drawings, As for the two-dimensional drawings to the application of profess