Design Methodology of the Modularization of Mechanisms

• Main Authors: Feng-Ming Ou, 歐峰銘
• Other Authors: Hong-Sen Yan
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/11574992927883606163

碩士 === 國立成功大學 === 機械工程學系 === 88 === This work proposes a methodology of mechanism synthesis based on the concept of modulization, namely, the mechanism design is completed through combining several specific, basic mechanism units. Firstly, the characteristics of input and output motion of mechanisms, including the motion types and axial characteristics, are studied. The symbol IAO (''I'' indicates the input motion type, ''A'' indicates the axial characteristic, and ''O'' indicates the output motion type) is proposed to represent the characteristics. Secondly, basic mechanism modules are defined, and the characteristics of each module are introduced. Three possible combinations of modules are defined based on graph theory, and conclusions are made on the constraints and the feasibility of the combinations. This work develops a catalog of basic mechanism modules and interprets the applications of modularized design. Targeting the single-input and single/multi-output mechanisms, a design theory with flow chart is proposed, and a program is developed to calculate all results. Furthermore, examples are illustrated to show the process of this design methodology. If the input motion type is ''a'' (rotation, continuous, and single-direction), the output motion type is ''d'' (rotation, intermittent, and bi-direction), and the axial characteristic is ''O'' (orthogonal), in combinations with two modules and three modules, 2 and 28 kinds of aOd combinations can be obtained, respectively. If the input motion type is ''g'' (rectilinear, continuous, and bi-direction), the output motion type is ''f'' (oscillating, intermittent, and bi-direction), and the axial characteristic is ''P'' (parallel), in combinations with two modules and three modules, 5 and 44 kinds of gPf combinations can be obtained, respectively. If the input motion type is ''a'' (rotation, continuous, and single-direction), the output motion type is ''g'' (rectilinear, continuous, and bi-direction), and the axial characteristic is ''P'' (parallel), in combinations with two modules and three modules, 5 and 29 kinds of aPg combinations can be obtained, respectively. If the input motion type is ''c'' (rotation, intermittent, and single-direction), the output motion type is ''d'' (rotation, intermittent, and bi-direction), and the axial characteristic is ''O'' (orthogonal), in combinations with two modules and three modules, 2 and 14 kinds of cOd combinations can be obtained, respectively. The suitable modules can be selected from the catalog of basic mechanism modules and IAO combinations to complete the design needed. Lastly, physical models are built through NC processing to show the feasibility of this approach.