Belt-Assisted Step-Up Gear Train for Shock-Resilient Power Transmission
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Solution Overview
Problem
Conventional planetary gearings used in wind power plants and electric vehicle drives are heavy and sensitive to shock and impact stresses, necessitating a lighter and more resilient transmission gearing solution.
Innovation Solution
A step-up gear mechanism utilizing fewer gear wheels and incorporating drive belts to absorb and dampen shock and impact stresses, reducing weight while maintaining power transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional planetary gearings with multiple pinions are used, then high power and torque transmission is achieved, but the weight of the transmission gearing increases
Solution Approach 1:
The patent replaces traditional mechanical pinion-gear wheel contacts with a belt drive system. The belt wraps around the pinions and the central gear, transmitting power through friction and tension rather than direct mechanical engagement. This substitution eliminates the need for multiple heavy pinions while maintaining power transmission capability, directly resolving the contradiction between power transmission and weight reduction.
Solution Approach 2:
The invention changes the fundamental transmission parameter from rigid mechanical contact to flexible belt tension. By using a continuous belt that wraps around the gears multiple times, the system achieves higher frictional engagement and more efficient power transmission with fewer components, thereby reducing overall weight while maintaining or improving power transmission efficiency.
2Force
If conventional planetary gearings with pinions are used, then high torque transmission is achieved, but sensitivity to shock and impact stresses increases
Solution Approach 1:
The patent employs a flexible belt as the power transmission medium instead of rigid pinions. The belt's flexibility allows it to deform and absorb shock and impact loads, preventing stress concentration and damage to the gear components. This directly addresses the reliability issue by providing a cushioning effect that protects the transmission system from shock and impact stresses while maintaining torque transmission capability.
3Weight of moving object
If fewer gear wheels are used, then weight of the transmission gearing is reduced, but power transmission capability may be compromised
Solution Approach 1:
The belt drive system provides continuous contact and power transmission around the gear components, ensuring that power is transmitted smoothly and continuously without the intermittent engagement characteristic of traditional pinion-gear systems. This continuous action maintains power transmission capability while allowing for a reduced number of gear wheels, thus reducing weight.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution results in a lighter transmission gearing system that is less sensitive to shock and impact, achieving the same output as conventional planetary gears with reduced weight and complexity, suitable for integration into wind power plants and electric vehicle drives.
Implementation Method 1
the drive belts act as a damping element that absorb and dampen impact and shock stresses
Implementation Method 2
the drive belts act as a damping element that absorb and dampen impact and shock stresses
Implementation Method 3
The drive belt engages both the planetary shaft gear wheel and the high speed shaft gear
Implementation Method 4
The drive belt engages both the planetary shaft gear wheel and the high speed shaft gear
Data Source
AI summary
A transmission gearing includes a sun gear, a planetary unit and a high speed unit. The sun gear is mounted on a slowly rotating gear shaft. The planetary unit includes a planetary toothed gear wheel and a planetary shaft gear wheel, which are both mounted on a planetary shaft. The planetary shaft gear wheel has a diameter that is larger than that of the planetary toothed gear wheel and smaller than that of the sun gear. The planetary toothed gear wheel engages the sun gear. The high speed unit includes a quickly rotating gear shaft on which a high speed shaft gear is mounted. The high speed shaft gear has a diameter that is smaller than that of the planetary shaft gear wheel. A drive belt engages both the planetary shaft gear wheel and the high speed shaft gear. The slowly rotating gear shaft is parallel to the planetary shaft.