As electric vehicles (EVs) become increasingly popular, their drivetrains face some demanding engineering challenges. Gears must withstand high levels of torque while delivering the smooth, quiet performance drivers expect.
In an article published in Gear Solutions Magazine, Dr. Hermann J. Stadtfeld of Gleason Corporation explores how improved bevel gear design and manufacturing techniques can help achieve these goals.
Unlike traditional petrol and diesel engines, electric motors operate at higher speeds and can deliver sudden bursts of torque. Meanwhile, the absence of engine noise makes gear whine and vibration much more noticeable.
The article explains how optimising gear geometry, tooth contact patterns and manufacturing precision can improve both strength and noise performance. Advanced finishing techniques, including grinding and honing, help produce smoother tooth surfaces, reducing unwanted vibration.
One important development is selective crowning, which involves carefully modifying gear tooth shapes to distribute loads more evenly and reduce stress concentrations.
The article also examines Gleason’s MicroForm technology, which introduces controlled variations to tooth surfaces to break up repetitive noise frequencies and reduce irritating high-pitched gear whine.
For gear manufacturers, the message is clear: achieving quieter, stronger EV transmissions requires a combination of innovative design, precision manufacturing and advanced finishing techniques. For the entire article click here.