The Analysis And Synthesis Of Cam-linkage Combined Mechanisms

Cam-linkage mechanisms can realize many kinds of motions. It's a kind of increasingly developing used widely combined mechanism. Therefore, it is necessary to study on it. As they have great advantages over other mechanisms in the field of accurately accomplishing expected trace, this paper mainly focuses on such cam-linkage mechanisms. The study finished is as follows.(1) A method of synthesizing the types of cam-linkage mechanism is introduced. It includes the prerequisites, existing criterions and process of transforming link mechanisms into cam-linkage combined mechanisms, as well as the way to catalogue all the combined mechanisms. By using the method, 6, 8, 10, 2 and 4 cam-linkage mechanisms are deduced from the 2 existing six-bar kinematic links in order to accomplish function, motion trace, trace, plane motion refer to timing and plane motion regardless of timing respectively. And 48 cam-linkage mechanisms are deduced form the 16 existing eight-bar kinematic links to accomplish plane motion refer to timing. The method is also useful in multibar kinematic links'transformation and helpful in developing new cam-linkage combined mechanisms.(2) A quite simple analytical method of determining disk-cam curvatures is provided for cam-linkage mechanisms to accomplish both motion trace and trace. And both the 8 cam-linkage mechanisms for motion trace and the 10 cam-linkage mechanisms for trace above are synthesized dimensionally in the method.(3)Apply the standard for measuring mechanism's quality of transmission to the optimum design of cam-linkage mechanisms.