A NEW COUPLER CRITICAL DIMENSIONS (CCD) METHOD FOR LINKAGE MECHANISMS MOBILITY ANALYSIS
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Date
2021-06-07
Authors
Ali, Md Hazrat
Mir-Nasiri, Nazim
Namazov, Manafaddin
Mirzayev, Husseyn
Tanveer, M. Hassan
Journal Title
Journal ISSN
Volume Title
Publisher
J. E. Purkyně University in Ústí nad Labem
Abstract
A new Coupler Critical Dimensions (CCD) approach to define mobility criteria (crank, rocker conditions,
or existence) for linkage mechanisms has been presented in this paper. The concept is critical to design
and analyze the extreme lengths of a mechanism coupler link when the mechanism is at the extreme of
its existence or changing its mobility condition. The method leads a set of expressions of the constant
mechanism parameters that can define the mechanism's coupler link's exact dimensional limits. These
expressions present sufficient and necessary dimensional conditions for the mechanism's existence and
become a turning point to change mobility from a crank to a rocker and vice versa. The mechanism
reaches its change-point configuration at the boundaries of the coupler dimensions. The mechanism may
switch from one work function to another or from existence to non-existence. The method has been
successfully applied to the planar 4R, spatial RSSR, and planar multiloop linkage mechanisms. The obtained results prove the effectiveness and accuracy of the method in defining the limits of the mechanism
rotatability conditions or existence in general. The crank condition is essential to couple it with the motor
or engine. If the mechanism input link is not a crank (i.e., it has a possibility of full rotation), the motor
may crash the entire mechanism. Rotatabilty of the input link is a fundamental concept in machines and
mechanisms.
Keywords: Additive Manufacturing, 3D Printing, Composite Materials, Material Properties
Description
Keywords
Additive Manufacturing, 3D Printing, Composite Materials, Material Properties, Type of access: Open Access
Citation
Ali, H., Mir-Nasiri, N., Namazov, M., Mirzayev, H., & Tanveer, M. (2021). A New Coupler Critical Dimensions (CCD) Method for Linkage Mechanisms Mobility Analysis. In Manufacturing Technology (Vol. 21, Issue 3, pp. 288–293). Jan Evangelista Purkyne University in Usti nad Labem. https://doi.org/10.21062/mft.2021.037