Abstract
The material of a practical lesson on the parametric analysis of crank-rocker mechanisms is presented. A family of such mechanisms is considered, in which the maximum transmission angle is reached in the crank position at an angle of 75 degrees. The theoretical part provides brief information about the analyzed family of mechanisms. Formulas are obtained to determine the values of the relative lengths of the connecting rod and rocker arm, as well as the minimum transmission angle, as a function of the crank length. These formulas are used only to calculate mechanisms of the named family with equal connecting rod and rocker arm lengths. Formulas are obtained for establishing the values of the minimum transmission angles and swing angles of the rocker arm. These formulas are used in cases when the mechanism of the analyzed family corresponds in pairs to the mechanisms of known families. In the practical part of the article, the course of solving four types of problems is considered. These problems illustrate the application of the formulas proposed in the theoretical part.
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