To upgrade transmission gear parts to improve efficiency, here are some methods to consider:
1. Optimize the gear geometry: By improving the gear geometry, such as gear tooth shape, gear module, etc., the sliding and loss of the gear tooth pair contact can be reduced and the transmission efficiency can be improved. Modern computer-aided design and manufacturing technology can aid in precise gear design and manufacturing.
2. Choose high-quality materials: Choose materials with high strength, high hardness and low friction coefficient, such as high-strength steel, alloy steel, etc., which can reduce gear deformation and wear and improve transmission efficiency.
3. Precise machining and heat treatment: Through precise gear machining and appropriate heat treatment, such as flame quenching, carburizing, etc., the hardness and durability of the gear can be improved, and the sliding and energy loss between gears can be reduced.
4. Use lubricant: Choose appropriate lubricant and ensure that the lubrication of the transmission system is sufficient. Good lubrication can reduce gear friction and wear and improve transmission efficiency.
5. Reduce interference forces: Consider reducing additional interference forces, such as axial load, bending load, etc. This can be achieved through proper bearing design, geometric correction of the shaft, etc.
6. Optimize the transmission layout: For complex transmission systems, optimizing the transmission layout can reduce unnecessary rotation and energy loss. Transmission efficiency can be improved by minimizing the number of gears in the transmission system and reducing the rotation angle of the gear transmission.
7. Monitoring and maintenance: Regularly monitor gear transmission efficiency and perform necessary maintenance and upkeep, such as cleaning, lubricant replacement, etc. This ensures proper operation and efficient working of transmission gear parts.
It’s important to note that upgrading transmission gear parts to improve efficiency can involve complex engineering and manufacturing processes. Before upgrading, it is recommended to consult a professional engineer or mechanical designer to ensure the feasibility and safety of the upgrade solution. 
