Bearing Assemblies of Robotic Systems

Abstract

Modern robotic and mechatronic systems incorporate numerous bearing assemblies with rolling bearings [1,2]. The performance, specifically the reliability and durability of robotic systems, is largely determined by the functionality of these bearing assemblies. Bearing assemblies are typically subjected to combined loads, including radial and axial loads. The ratio of these loads varies from assembly to assembly [3,4]. Let's consider some aspects of ensuring and improving the performance of bearing assemblies.

The presence of clearances in the bearing, the formation of initial elastic deformations of the rolling elements and working surfaces of the bearing rings at the points of their contact under the action of the working load, causes axial and radial vibrations of the shaft, which are unacceptable in several units of robotic systems. The peculiarity of rolling bearings is that their stiffness can be significantly increased by special adjustment, known as preload.