Mathematical model of an electromechanical jackhammer based on a variable structure mechanism

The object of study is an electromechanical jackhammer based on a variable structure mechanism. The paper notes the relevance of studying the dynamics of a jackhammer. Mathematical modeling methods were used to study the dynamics of an electromechanical jackhammer. To compile the final calculation scheme, on the basis of which the equations of motion of the elements under study are written, it is simplified for reasons of the need to study the movement of the characteristic elements of the jackhammer. Simplification of the design scheme is carried out on the basis of partial systems, sequential connection of rigidities and combination of moments of inertia of the jackhammer elements. After the simplifications made, a three-mass design scheme was obtained. A system of differential equations has been compiled to describe the movements of the elements of the mechanical transmission and the crank of the impact mechanism of an electromechanical jackhammer. The solution of the resulting equations is carried out using the Runge-Kutta numerical method using the Mathcad computer program. Solving the equations of motion of the jackhammer elements and their analysis will allow us to determine the rational parameters of the jackhammer elements.