Design and application of an efficient extraction tool for gears and bearings in engineering machinery

This paper addresses the challenge of difficult extraction of gears and bearings damaged by wear in mechanical transmission systems of engineering machinery, presenting the design of a new extraction tool. The structure, working principle, and material selection of the device are detailed, with its rigidity and strength validated through finite element analysis. Results show a maximum deformation of 0.11 mm and a maximum equivalent stress of 53 MPa—values far below the material’s allowable limit (820 MPa)—meeting design requirements. The tool effectively solves issues of low efficiency and damage risks associated with traditional disassembly methods.