In mechanical engineering, various methods of fastening the hub to the shaft for the transmission of torque are widely used. However, the methods used are not devoid of a number of disadvantages inherent in varying degrees for each of them. The authors proposed a constructive solution for reliable mounting of the hub on the shaft, which provides operational control of the axial and angular position of the part, and also developed a software application that allows the calculation of the tightening force depending on the connection parameters.

In preparations for production, developers must consider the automatic control of the static loads in multicontact mechanical systems (such as gears, joints, bearings, and couplings). The methods developed in the present work prove efficient in the design and modernization of such systems.

The possibilities of using gear-lever mechanisms in modern mechanical engineering are described on the example of three mechanisms from different areas of industry. For practical application, a method of structural and kinematic analysis of gear-lever mechanisms is proposed, implemented using the program module developed by the authors, and an algorithm for kinematic calculation of a gear-lever three-wheeled articulated four-link, as the most common and used in mechanical engineering, is given.