机械英语1 Keys,Splines,Pins.ppt

TOPIC KEYS,SPLINES,AND PINS 1, Keys * * 演讲人： 范强龙 PPT制作：董露杰 辅助人员：樊福传 邸维龙 TEXT STUDY 班级：机械本121 专业：机械设计制造及其自动化 学年：2013-2014 系别：机械与电子工程学院 滁州学院 Keys、Splines、and Pins （1）Linkage function, classification, structure and application Classification：flat key, woodruff key, wedge,tangential keys Function ： Implementation on the shaft and the shaft parts (such as gears, pulleys, etc.) the circumferential fixed to transfer torque ； Shaft parts of axial fixation with axial force ； Constitute the axial dynamic connection to give the parts on the axial sliding . 1. Flat key Two side is the face of flat key.Commonly used flat key has the common flat key, oriented flat and sliding keys 3 kinds. Ordinary flat key end shape: Round head (type A), square head (type B), single round head (C). 1）Ordinary flat key For connecting the static, no relative axial movement between shaft and hub 2）Thin flat key Key high about 60% ~ 70% of ordinary flat key: round, square, single round head For thin arm structure, hollow shaft and the limited size of the radial join 3）Orientation flat key and key For connecting the move, that is, between shaft and hub connection with relative axial movement The groove of the shaft with plate milling cutter or finger milling processing; Wheel knife inserted with broach or processing. Structure: two sides of working face, rely on key and slots extrusion and key of shear transfer torque Orientation flat key structure The sliding key structure The sliding key ——Key moves along with the wheel hub Feather key ——Keys motionless, wheel hub axial movement Features: convenient installation and impact on the parts for neutral, easy manufacturing, reliable function, used for high precision coupling.But only circumferential fixation, unable to bear axial force 2、Woodruff key Axial slot with the same as the woodruff key shape cutter machining, the key to swing in the groove around the geometric