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1、 1三速变速箱及其操纵机构设计内容摘要作为传统机械的变速箱,在交通设施，机床变速机构中都起着举足轻重的作用。在科技日益发达及经济全球化的浪潮中，变速箱也在日益变化着，进步着。如今的变速箱种类繁多，如直齿圆柱齿轮变速箱，斜齿圆柱齿轮变速箱，有一级、二级和多级的，根据不同的要求采用不同的变速箱。我所设计的三级变速箱主要用于机床在不停车的情况下利用拨叉波动三联滑移齿轮，使三对齿轮分别在不同的转速要求下啮合，从而达到变速的目的。其中在设计齿轮的时候由于考虑到传动比较小，为了彼此平衡，所以采用了直齿圆柱齿轮。由于为了能让三联滑移齿轮在正确的轨道上滑行并与每个齿轮正确啮合，还设计了一个操纵机构，此操纵机构
2、为齿轮齿条，它传动平稳，结构简单，比较适用与在这样的机构当中。简而言之，对三速变速箱的设计主要是传动方案的确定，三联滑移齿轮的设计及齿轮齿条操纵机构的设计。关键词： 齿轮 变速 2Content summaryAs tradition mechanical gear box, in traffic facility, lathe change speed organization very important conduct arises. The gear bo of today is various in style, such as the cylinder gear wheel gea
3、r box of straight tooth, the cylinder gear wheel gear box of oblique tooth, there is one grade, second and multistage. Adopt different gear boxes according to different demands. Tertiary gear box that I design used in lathe is it set aside fork is it three unite slippery to move the gear wheel to fl
4、uctuate to utilize in case of not parking mainly, Enable clenching the teeth to the gear wheel under different demands separately three times, and achieve the goal of changing speed. Among them consider when design the gear wheel the transmission is smaller, for being balanced each other, so adopt t
5、he cylinder gear wheel of straight tooth. Because location make slippery tomove gear wheel it slides to be and correct to clench the teeth with another gear wheel at correct track, have also designed an operating organization, this operating organization is a rack of a gear wheel, its transmission i
6、s steady, of simple structure, relatively suitablefor such an organization. In brief, the design of the gear box of speed three is mainly the sureness of the scheme of transmission, unite the slippery design which move the gear wheel and design of the rack operating organization of the gearwheel thr
7、ee times. 3Key word : Gear wheel Change speed目 录内容摘要 .1前言 .41. 三速变速箱设计基本概述 .51.1 设计目的及意义 .51.2 三速变速箱的认识和市场调查 .51.2.1 查阅资料进行了解 .51.2.2 市场调研 .51.3 设计难点及指导思想 .62. 设计题目的研究 .61设计题目介绍 .63.总体方案的拟定 .74.原动机的选择 .7Y90L-2 .85.确定传动装置的总体的传动比和分配各级传动比 .95.1 计算总的转动比 .95.2 选择 V 带传动比 .95.3 分配各级传动比 .106.传动装置的运动和动力参数 .106.1 高速轴和低速轴转速计算 .106.2 合轴的功率 .116.3 计算合轴的转矩 .117.V 带传动设计 .118.齿轮传动设计 .138.1 选择材料及确定许用应力 .138.2 齿轮设计 .148.2.1 第一对齿轮的设计计算 .148.2.2 第二对齿轮的设计计算 .158.2.3 第三对齿轮的设计计算 .
