Substantiation of the main parameters of the new working equipment of the grab excavator for the development of large-block soils

Abstract

Traditional designs of working bodies of earthmoving machines are not adapted for the development of large-block soils of mudslides and other blockages in emergency situations, which leads to a decrease in their productivity. Therefore, it is necessary to create special working bodies of single-bucket excavators for the development of mudflows with large-block inclusions, allowing to expand the functionality of these machines. The subject of the study is to determine the kinematic and power parameters of the mechanism of extension of a special working body of an excavator based on analytical studies and computer modeling. The article proposes a method for determining the links of the mechanism of a special excavator working body and algorithms and methods for determining the positions, coordinates of the points of the links. As result of the study there have been obtained closure equations of independent contours of the jaw extension mechanism of a special excavator bucket in vector form for determining angular velocities and accelerations of the links and numerical and graphical parameter values.