In the practical application of traction gearboxes for rail transit, a common phenomenon emerges during disassembly and inspection: while one bearing shows obvious damage, other components such as gears, adjacent bearings, seals, and even the gearbox housing also exhibit abnormalities to varying deg

As a fundamental mechanical power transmission technology, gear transmission plays an irreplaceable role in modern industry. From the precision movement of wristwatches to the heavy-duty operation of industrial machinery, from automotive transmissions to aerospace engines, gears realize the efficien

1. Introduction: A Persistent Challenge in Gear Ring ManufacturingIn the production of gear ring components (including large-module gears, gear rings, and rim gears), ellipticity out-of-tolerance after heat treatment is a long-standing issue. However, on-site judgments often misattribute the problem

Involute splines are crucial power transmission components in mechanical drive systems, renowned for their excellent mechanical strength and smooth transmission characteristics. They find widespread application in aircraft, automobiles, heavy machinery, construction machinery, and other fields. A co