Belt Drive Assembly Vibration Reduction via Flexible Transmission
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Solution Overview
Problem
Drive shafts experience bending vibration and misalignment-induced vibrations, leading to wear and potential failure, which can result in injury or death, due to their inefficiencies in power transmission.
Innovation Solution
A belt drive assembly comprising a frame with pulley wheels and an endless belt that transfers torque and rotation from a power source to a driven component, using idler pulley wheels and a resilient member to maintain tension and prevent detachment, thereby reducing vibration and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If drive shafts are designed to be stiff to minimize bending vibration, then vibration amplitude is reduced, but the device complexity and weight increase due to additional bearings and stiff shaft design
Solution Approach 1:
The patent replaces the traditional mechanical drive shaft system with a belt drive system. Instead of using a rigid shaft that requires bearings and stiff design to control vibration, the invention uses a flexible belt that naturally accommodates misalignment and reduces vibration through its elastic properties, thereby eliminating the need for complex bearing arrangements and stiff shaft design
Solution Approach 2:
The patent changes the fundamental parameter of power transmission from rigid mechanical coupling to flexible belt transmission. By changing from a solid shaft with fixed stiffness to a belt with variable elasticity, the system achieves vibration reduction without requiring additional bearings or complex structural modifications
2Stability of the object's composition
If drive shafts are made stiff to prevent misalignment vibration, then power transmission stability improves, but the reliability decreases due to increased wear and potential failure
Solution Approach 1:
The patent employs a flexible belt as the power transmission medium instead of a rigid shaft. The belt's flexibility allows it to conform to pulley surfaces and accommodate misalignment without generating excessive vibration, while its elastic nature reduces stress concentrations that lead to fatigue and failure, thereby improving reliability
Solution Approach 2:
The patent introduces dynamic flexibility into the power transmission system through the belt. Rather than a static rigid shaft, the belt can dynamically adjust to misalignment and vibration conditions, absorbing shocks and reducing wear on connected components, which enhances overall system reliability
3Productivity
If traditional drive shafts are used for power transmission, then efficiency is maintained, but harmful vibrations cause wear and potential failure leading to safety issues
Solution Approach 1:
The patent converts the potentially harmful vibration that occurs in rigid shaft systems into a beneficial feature by using a flexible belt. The belt's elasticity transforms vibration into controlled flexing and damping, where the same dynamic movements that could cause wear in rigid systems instead reduce stress and minimize wear on connected components
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 belt drive assembly effectively minimizes vibrations and wear, enhancing the safety and reliability of power transmission by using an endless belt and resilient members to maintain tension and secure the power transfer.
Implementation Method 1
an endless belt trained on the drive pulley wheel, over each idler pulley wheel, and on the driven pulley wheel, so that the endless belt transfers torque and rotation from the power source to the driven component
Data Source
AI summary
The belt drive assembly includes a frame having a first plate including an inner surface, an outer surface, a first end, and a second end, a second plate including an inner surface, an outer surface, a first end, and a second end, and a shaft disposed between the first plate and the second plate. The belt drive assembly also includes a first pair of idler pulley wheels positioned coaxially at one end of the first plate, a second pair of idler pulley wheels positioned coaxially at one end of the second plate, a drive pulley wheel rotatably mounted onto the outer surface of the first plate, a driven pulley wheel rotatably mounted onto the outer surface of the second plate, and an endless belt trained on the drive pulley wheel, on each idler pulley wheel, and on the driven pulley wheel.