EXPERIMENTAL CONFIRMATION OF EQUATIONS’ ADEQUACY OF GEOMETRIC CONNECTIONS IN THE MUNICIPAL MACHINE WITH THE BRUSH WORKING BODY PARALLELOGRAPHIC SUSPENSION

Introduction. The authors arise the question of increasing the efficiency of the municipal machine. Moreover, the influence of the clamping force of the brush body on the surface and on the brush deterioration and, as a consequence, on the quality of the roadway cleaning is highlighted in the article.
Methods and materials. The results of the changing process of the brushing tool vertical coordinate in the municipal machine were presented, depending on the displacement of the hydraulic cylinder rod. The analysis of the existing types of the brushing working body suspension was carried out. As a result of such analysis, the authors established the most frequent usage of the three-point and parallelogram suspensions, the schemes of which were also presented in the article.
Results. The equations of geometrical connections of the municipal machine elements, which could be used in mathematical model, are presented. In addition, the kinematic diagram of the municipal machine with the brush working body suspension is drawn up. Therefore, the  presented model takes into account such parameters as the length of the levers’ arms, the linear movements of the hinges, the rod stroke, the levers’ angles and the distances between the hinges. The methods and the course of the experiment for determining the displacement dependence of the brush body from the displacement of the hydraulic cylinder rod are described. The authors also present the photographs of the experimental research fragments.
Discussion and conclusions. On the basis of the obtained data, the authors construct the experimental and theoretical dependences’ graph of the brush body displacement and the actuator hydraulic cylinder rod displacement. The analysis of such graphs confirms the adequacy of the geometric constraint equations and also proves that these equations could be used in the mathematical model of the position controlling process of the brush operating body and also for determination the optimum value of the brush working element clamping force to the surface.

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