机械设计及其自动化_课程设计__万向节_传动叉(滑动叉)正文.doc

摘 要 万向节滑动叉位于传动轴的端部。它的主要作用：一是传递扭矩，使汽车获得前进的动力；二是当汽车后桥钢板弹簧处在不同的状态时，由本零件可以调整传动轴的长短及其位置。零件的两个叉头部位上有两个孔，用以安装滚针轴承并与十字轴相连，起万向联轴节的作用。零件上的花键孔与传动轴端部的花键轴相配合，用于传递动力之用。 此次设计是在学完机械制造工艺学及机床夹具设计课程，并进行了生产实习的基础上完成的。本设计主要编制该零件的机械加工工艺规程，并设计其中一道工序的专用夹具，并撰写设计说明书。 此次设计培养了我熟悉并运用有关手册、规范、图表等技术资料的能力。进一步锻炼了我识图、制图、运算、编写技术文件和操作CAD等基本能力。 关键字：万向节滑动叉、工艺、专用夹具 Abstract Universal joint glide fork is located the drive shaft the nose.Its main function: One, the transmission torque, causes the automobile to obtain the advance the power; Two is when the automobile rear axle of car spring occupies the different condition, may adjust the drive shaft by this components the length and the position. In the components two jaw spot has two holes, with installs the needle bearing and is connected with the cross axle, plays the rotary shaft coupling role. On the components colored key hole and the drive shaft nose spline shaft coordinates, to use in transmitting using of the power. This design is in study the machine manufacture technology and the engine bed jig design curriculum, and carried on in the production practice foundation to complete. This design mainly establishes this components the machine-finishing technological process, and designs working procedure the unit clamp, and composes the design instruction booklet. This design trained me to be familiar with and to utilize related technical data and so on the handbook, standard, graph abilities.Further exercised me to know the chart, the charting, the operation, the compilation technology document and operates CAD and so on the basic capability. Keyword: Universal joint glide fork, craft, unit clamp. 第一章零件的分析 1．零件的作用 放牌汽车底盘传动轴上的万向节滑动叉，它位于传动轴的端部。主要作用一是传递扭 矩，使汽车获得前进的动力；二是当汽车后桥钢板弹簧处在不同的状态时，由本零件可以调整传动轴的长短及其 位置。零件的两个叉头部位上有两个Φ39mm的孔，用以安装该针轴承并与十字轴相连，起万向联轴节的作用。零 件Φ65mm外圆内为Φ50mm花键孔与传动轴端部的花键轴相配合，用于传递动力之用。 2．零件的工艺分析 万向节滑动叉共有两组加工表面，它们之间有一定的位置要求。现分述如下： (1)以Φ39mm孔为中心的加工表面 这一组加工表面包括：两个Φ39mm的孔及其倒角，尺寸为118mm的与两个孔Φ39mm相垂直的平面，还有在平面上的四个M8螺孔。其中，主要加工表面为Φ39mm的两个孔。 (2)以Φ50mm花键