齿轮齿条式液压动力转向器设计.doc

毕 业 论 文（ 设 计 ） 题 目： 齿轮齿条式液压动力转向器设计 （Title）：Gear rack type hydraulic power steering gear design 系 别： 机电工程学院汽车系 专 业： 汽车设计 姓 名： 学 号： 指导教师： 日 期： 齿轮齿条式液压动力转向器设计 摘要 本设计是齿轮齿条液压动力转向器的设计。以齿轮齿条转向器的设计为中心，一是轿车转向系统总述；二是机械转向器的选择；三是齿轮和齿条的合理匹配，以满足转向器的正确传动比和强度要求；四是动力转向机构设计；五是梯形结构设计。因此本设计在考虑上述要求和因素的基础上研究利用转向盘的旋转带动传动机构的齿轮齿条转向轴转向，通过万向节带动转向齿轮轴旋转，转向齿轮轴与转向齿条啮合，从而促使转向齿条直线运动，实现转向。实现了转向器结构简单紧凑，轴向尺寸短，且零件数目少的优点又能增加助力，从而实现了汽车转向的稳定性和灵敏性。在本文中主要进行了转向器齿轮齿条的设计和对转向齿轮轴的校核，主要方法和理论采用汽车设计的经验参数和大学所学机械设计的课程内容进行设计，其结果满足强度要求，安全可靠。 关键词：转向器设计；动力转向；齿轮轴 Gear rack type hydraulic power steering gear design ABSTRACT This design is mainly design a new type of fully hydraulic drill gripper. First analysis of drill is influenced by various factors in the practical work, analysis of working condition requirements, design a suitable tank circuit, support cylinder loop, boost cylinder loop, gripper hydraulic circuit and hydraulic motor hydraulic circuits, analysis in this paper, the working condition of various kinds of hydraulic circuits. Choose the reasonable hydraulic components, a complete assembly of the hydraulic circuit. Moreover, the design of the gripper types for holder normally closed type, the structure distribution evenly, relying on the disc spring and a cylinder clamping force, with hydraulic loosening, can clamping drill pipe is 73 mm and 63 mm. Mainly used for coal engineering hydraulic power head drill loading and unloading drill rod, its simple structure, convenient operation, good marketing benefit. This design request to design the reasonable structure of gripper, try to make the holder of small volume, good computing saucer reed and the clamping force of gripper hydraulic cylinder can provide, calculate the size of parts of gripper, the structure of the holder in finite element stress analysis, find out the unreasonable structure parts and improved. Keywords: stee