履带推土机传动系统设计 大学论文.docVIP

学 号 2010071106 密 级 __________ 哈尔滨工程大学论文  学 号 2010071106 密 级 __________ 履带推土机传动系统设计 The Design of the Transmission System of Crawler Bulldozer 摘 要 随着新世纪的前进，我国在市政工程、道路交通、农田水利、能源矿上等对高性能机械产品的需求迅速增长，机遇与挑战并存，对其性能要求也越来越严格。作为工程机械的重要组成部分——推土机，随着工况条件的复杂与艰难，对其工作可靠性、维修性、安全性和燃油经济性也提出了更高的要求，而这些要求均与推土机传动系统有着密切的关系。 本设计在了解工程机械人力换挡变速器的基本原理、特点、及国内外必威体育精装版发展情况的基础上，设计履带推土机传动系统的工作结构，使其实现5个前进挡和4个倒退挡。本设计采用的是机械式传动系统，主要完成了以下工作：对各挡分配传动比；对挡位之间布置进行安排；确定齿轮传动方式，及各齿轮参数、轴布置及轴结构设计；设计换挡机构锁销式同步器；对支承传动齿轮的箱体进行大致的设计；并且，与此同时使用PRO/E软件工具进行三维模型绘制和装配关系分析，对重要受力构件进行强度分析，能够实现目的、满足基本要求，运用CAD绘制二维装配图与零件图。 通过本次课题设计，进一步加强所学的专业知识，了解和掌握机械系统设计步骤和方法。并经过三维CAD系统和运动学分析软件的建模和分析练习，掌握了先进的设计方法和设计理论，提高了实践能力。 关键词：高性能机械产品、推土机、传动系统、人力换挡变速器、同步器ABSTRACT With the century of progress, the need of high-performance machinery products for munioipal engineering, road traffic, irrigation and water conservancy, energy and mines and so forth is rapidly increasing. Opportunity is always standing by dekaron, the performance of which is increasingly strict. As the significant member of construction machinery, the buildozer has to improve its working reliability, maintainability, safety, fuel economy to adapt to the more complex and difficult environment, which is closedly related to the transmission system of the buildozer. After having a knowledge of theory, feature, the latest condition at home and abroad about the human transmission, I designed the transmission of the buildozer, which has five forward gears and four reverse gears. The plan adopted to mechnical transmission system. The main work finished is as follow: distrubute gear ratio to every gear, arrange the configuration of each other gear, comfirm the driving mode of gear wheel, including parameter the arrangement and structure of shafts, design the lockpin synchroizer and the box; As well, I used the PRO/E to draw three-dimensional mode and analysis weighted, finding it reasonable, then draw its X-Y scheme. Through the progress, I have a deep con