Influence of the Cutting Angle on the Resistance of Bulldozer Working Equipment Blade Burial When the Machine Is Moving

The influence of the cutting angle on the resistance to the bulldozer blade burial during its movement, taking into account the one-sided stressed state of the soil, was studied in the research results of which are presented in this paper. It is established that the resistance to deepening is significantly reduced when the machine is moving, which allows using smaller cutting angles without increasing the energy consumption. Constructive features and kinematics of the working equipment are considered, including a promising parallelogram scheme, which provides automatic reduction of the cutting angle during deepening. Calculations of the resistance of the blade penetration into the ground, and experimental data confirming the cutting force reduction up to 7%, for each degree of angle reduction, are given. It is determined that the optimum cutting angle is 30-40°. The obtained results can be used to increase the productivity of bulldozers and optimize the design of their working equipment.