Balanced Nested Split Pulley Transmission for Low Vibration
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Solution Overview
Problem
Nested split pulley transmissions experience vibration and unbalanced forces at high speeds due to the off-center nature of the inner split pulley, leading to unwanted effects such as increased wear, noise, and reduced efficiency.
Innovation Solution
Incorporating multiple inner split pulleys arranged in a balanced configuration around a central axis to balance masses and forces, reducing vibration and load on bearings, and using a planetary gearset to control the transmission ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single inner split pulley is used in a nested configuration, then the transmission size is reduced and transmission ratio control is achieved, but vibration and unbalanced forces increase at high speeds
Solution Approach 1:
The patent applies the counterweight principle by adding a second inner split pulley positioned opposite the first inner split pulley. These two inner pulleys are arranged to balance each other's masses and forces, creating a counterbalancing effect that eliminates the vibration and unbalanced forces caused by the off-center nature of a single inner pulley, while maintaining the compact nested transmission configuration
2Object-affected harmful factors
If multiple inner split pulleys are added to balance forces, then vibration is reduced, but device complexity increases
Solution Approach 1:
The patent applies the nesting principle by placing the inner split pulleys inside the outer split pulley, with the inner pulleys positioned concentrically within the outer pulley's structure. This nested arrangement allows multiple pulleys to coexist in a compact space, achieving force balance without proportionally increasing the overall transmission size or structural complexity
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 balanced nested split pulley transmission reduces vibration, allows higher operational speeds, decreases the number and cost of bearings, and enhances efficiency by balancing forces and reducing wear.
Implementation Method 1
a belt, wherein the belt is in contact with the outer conical split pulley and with at least one of the inner conical split-pulleys
Data Source
AI summary
A variety of transmission mechanisms are provided that include split pulleys nested within each other in order to reduce the size of the transmissions, to provide infinitely variable transmission ratios that include forward and reverse ratios, or to provide some other benefits. The transmissions include multiple inner split pulleys nested within an outer split pulley. Two, three, or more inner split pulleys can be disposed within the transmission to balance the mass of the inner split pulleys in order to reduce vibration and internal stresses experienced by the transmission. This can increase the lifespan of the transmission, reduce wear, and increase efficiency. Additionally, providing multiple inner split pulleys in a nested configuration can allow for reduction of loads transmitted through bearings of the transmission.