毕业设计（论文）-汽车主减速器主锥总成结构设计及有限元分析.doc

汽车主减速器主锥总成结构设计及有限元分析
摘要
主锥总成接受原动机传来的动力,并向所啮合的圆锥齿轮进行传递运动。在汽车主锥总成这一超静定的结构中,锁紧螺母的预紧力大小与垫片的选择直接相关,垫片厚度不同,轴承预紧不同,齿轮的位置也不同。本文针对装配中结构强度的问题,进行了后桥主减速器主锥总成装配技术中的力学研究,剖析了主锥总成的装配过程,找出了装配过程中的主要力学因素。基于装配过程中预紧需要的预紧力矩,通过理论分析获得拧紧力矩和轴向力的关系,建立了主减速器总成装配中的力学模型。在建立力学模型之后运用有限元法对主锥总成装配过程进行了数值分析。有限元法可以解决过去对复杂结构作精确计算的困难,改变了传统的经验设计方法。把有限元法运用在汽车主减速器主锥总成装配校验中,可以通过主锥总成应力分布的模拟分析和计算了解主锥总成中的应力分布与其装配结构的关系,从而给出装配后主减速器的应力分布场,最后完成其结构强度的分析和评价,为改进主减速器的设计和制造提供理论依据。
关键词汽车主锥;轴承座;接触分析;ANSYS
Design and Finite Element Analysis on the Main Cone's Assembly Structure of the Main Retarder
Abstract
The main reducing gear assembly transfer the motivity to the conic-gear it meshed. In the structure of the car main reducing gear assembly, the beforehand force of the locknut is directly related to the selection of the gasket, when the thickness of gasket is different, the behind force of bearing is different and so is the displacement of the gear. This paper assembly in the structural strength of the problems, after the main bridge reducer cone assembly in the mechanical assembly technology research, analysis of the main cone assembly of the assembly process,Through analyzing the structure of the main reducer, some mechanical factors, Based on pre-tighten moment in the process of assembly, the analytical model of the main reduce is established through theoretical analysis of the connection between screwed moment and axle force. By using finite element analysis, we obtain stress field and displacement field of the main reducer after assembly by finite element method. As a result, strength evaluation of the main reducer is performed. Based on these results, some theoretic suggestions for the design and manufacture of the main reducer are provided.
Keywords The main reducing gear assembly; Bearing block; Contact Analysis; ANSYS
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目录
摘要 I
Abstract II
第1章绪论 1
前言 1
国内外研究发展状况 2
课题来源及研究内容 3
课题来源 3
主要研究的内容 3
课题研究的意义 3
第2章主减速器装配分析 4
汽车主减速器功能 4
主减速器装配技术要求 4