基于最小传动角最大的曲柄摇杆机构设计方法  

Design Method of Crank-rocker Mechanism based on Maximum Value of Minimum Transmission Angle

作　　者：陈海文[1] 王忠[1] 赵斐[1] 

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010

出　　处：《机械传动》2015年第6期131-134,155,共5页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51375410)

摘　　要：在给定摇杆CD的长度、摆角φ和行程速比系数K(极位夹角θ)的条件下,为设计出最小传动角γmin最大的曲柄摇杆机构,通过引入辅助角β(用于确定曲柄回转中心A的位置夹角),构建了最小传动角γmin与角β的函数关系,并用Matlab软件对其进行优化求解,可实现最小传动角γmin最大。同时,针对K值范围的不同,对机构的选型进行了分类,指出了K∈(1,3)时,可用Ⅰ、Ⅱ型机构进行设计,且用Ⅰ型机构设计传力性能更佳;K∈[3,+∞)时,若用Ⅱ型机构进行设计,将无法满足摇杆摆角要求,按Ⅰ型机构进行设计,效率低,不利于机构的传动。Abstract Under the conditions of giving the length of the rocker CD, swinging angle φ and advance - to return -time ratio K（ extreme position angle θ） ,in order to design crank -rocker mechanism with the maximum value of minimum transmission angle γmin, the supplementary angleβ （ be used to determine the position angle of the rotation center A of crank） is introduced, the function relation of minimum transmission angle Tmin and the supplementary angle β is established. Then the maximum value of minimum transmission angle γmin can be ob- tained by utilizing procedure of Matlab. At the same time, in view of the different K value, the mechanism of type selection is classified. Then, points out the type Ⅰ and Ⅱ mechanism can be used to design and type I mechanism is better in force -passing property when K ∈ （1, 3 ）. When K ∈[3,＋∞ ）, if type Ⅱ mechanism is used to carry on the design, which will not be able to meet the requirement of the rocker swinging angle, if type I mecha- nism is used, which has low efficiency and is not conductive to transmission of the mechanism.

关 键 词：曲柄摇杆机构 急回特性 最小传动角最大 传力性能 

分 类 号：TH112[机械工程—机械设计及理论]