Analysis of impact cam mechanisms from the point of view of the rationality of their use in drilling machines

Saint Petersburg Mining University, 2, 21st Line, St. Petersburg 199106, Russia

^* Corresponding author: tmmiok@yandex.ru

Abstract

Modern drilling machines designed for the destruction of rocks have a diverse structure, various performance characteristics and in most cases a well-defined limited scope of application. One of the variants of the design of such machines is the integration of impact cam mechanisms into their structure, the variety of which allows achieving the specified working conditions. The most suitable one for impact machines is the front cam mechanism, in which the rotational movement of the cam is converted into the translational movement of the driven link – the pusher. Only cam mechanisms allow implementing a certain law of motion of the output-working link accurately. This article provides an overview of the well-known patented impact machines equipped with impact cam mechanisms. A brief description of each technical solution is provided, indicating mechanism differences and uniqueness. Based on the results of the critical analysis of the found machines and mechanisms, the tasks of further research are formulated. These results will be the development of scientific knowledge in the field of the use of cam mechanisms in impact machines, namely in drilling machines that can automatically adapt to operating conditions.