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The gears of new energy vehicles are the core components of the transmission system, and their performance directly affects the efficiency, noise, lifespan, and safety of the vehicle. The following are the core technical requirements for new energy vehicle gears:
High precision and high-speed adaptation
The motor speed of new energy vehicles is generally higher than that of fuel vehicles (some motors can reach speeds of over 10000r/min), requiring gears to have higher machining accuracy (usually reaching levels 4-6, while fuel vehicles require levels 7-8) to reduce vibration and noise.
lightweight design
New energy vehicles are sensitive to range, and gears need to reduce weight while ensuring strength. Some car models use aluminum or titanium alloys instead of traditional steel, or use "steel aluminum composite structures" in non critical components.
Optimization of anti vibration and noise reduction
The quietness of motor drive requires gears to further reduce noise. By optimizing tooth profile design (such as gear grinding technology), surface treatment (such as polishing, coating), and heat treatment processes, resonance and noise during gear meshing can be reduced.
The powerful honing technology can reduce the surface roughness to below Ra0.2 μ m, significantly reducing noise.
Improvement of thermal management capability
Electric vehicle motors generate more heat under high loads, and gearboxes need to have better thermal management capabilities. For example, using materials with excellent thermal conductivity or optimizing lubrication system design.
With the continuous development of new energy vehicle technology, the design and manufacturing of gears are also constantly improving to meet higher performance and reliability requirements.
