Abstract:Traditional cam mechanism with oscillating follower has the advantages of small size,low price,complex motion,and so on,which is widely used in printing machinery,agricultural machinery,textile machinery and automated office equipment,etc.As the automation machinery keeps moving towards high speed,high accuracy and lightweight,higher requirements are proposed for traditional cam mechanism with oscillating follower.When outputting a large angle,traditional cam mechanism with oscillating follower is required in great size structures.In addition,carrying capacity of traditional cam mechanism with oscillating follower is lower,because the contact between cam and follower is mostly high pair.So to some extent,applications of traditional cam mechanism with oscillating follower are limited.On the basie of movable teeth transmission and cam mechanism,a swing output movable teeth cam mechanism with advantages of both was proposed which has many superior attributes,such as flexible teeth number,full teeth mesh,wide range of swing angular and swing output regularly.The structure and transmission principle of the mechanism were introduced,besides,the angle relation of input and output cam were built by introducing cam curve and the equations of theoretical profile line and practical profile surface of input and output cam were deduced.The equations of curvature of cam theoretical profile line were given,and the change rules of the most values of theoretical profile line curvature and non-interference condition of cam practical profile surface were analyzed.From the graphical results,the most values of theoretical profile line curvature of input cam were on addendum and dedendum,and that of output cam appeared on start and end points,and the maximum curve with e/R ratio of cam theoretical profile line curvature had growth inflection point and peak,and the interference happened in the maximum offset profile surface cutting line of theoretical profile line.Therefore,when R,e and r parameters of cam practical profile surface are assigned,movable teeth radius r shouldn't exceed the threshold,and trying to guarantee that e/R ratio is lesser than corresponding value of growth inflection point and far away from corresponding value of peak,and then,ensuring that cam profile surface has no interference and mechanism runs more calmly.