V-Ribbed Belt Geometry for High Power With Lower Weight
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Solution Overview
Problem
Conventional V-belts are too large or heavy for many applications, synchronous belts face installation difficulties and misalignment issues, and V-ribbed belts are underutilized in industries due to power, alignment, and environmental constraints.
Innovation Solution
A V-ribbed power transmission belt with a design featuring an upper portion and a lower portion with multiple ribs, each rib having a first and second wall defining a groove, and an aspect ratio greater than 1.40, manufactured by layering fabric and rubber on a drum, vulcanizing, and machining grooves into a square cut core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional V-belts are used to transmit power, then power transmission capability is achieved, but the belt becomes too large and heavy for many applications
Solution Approach 1:
The belt is segmented into multiple V-shaped ribs instead of a single solid structure. This segmentation allows the belt to maintain power transmission capability through distributed friction contact while significantly reducing the overall weight and cross-sectional area of the belt body.
Solution Approach 2:
The belt utilizes thin rib structures with V-shaped cross-sections that function as flexible load-bearing elements. These thin-walled rib structures provide the necessary mechanical strength for power transmission while minimizing material usage, resulting in a lighter and more compact belt design.
2Power
If synchronous belts are used to transmit power in limited space, then power density increases, but installation difficulty and misalignment issues increase
Solution Approach 1:
The belt employs multiple V-shaped ribs that create distributed contact zones with the pulley, similar to conventional V-belts. This segmentation provides inherent alignment tolerance as the distributed contact can accommodate minor misalignments, unlike the single-point tooth engagement of synchronous belts.
Solution Approach 2:
The belt design changes the engagement parameter from direct tooth-to-tooth mechanical engagement (synchronous belts) to friction-based contact through V-shaped ribs. This parameter change maintains high power density while significantly improving ease of installation and alignment tolerance.
3Power
If V-ribbed belts are designed with higher aspect ratio, then power transmission efficiency increases, but manufacturing complexity increases
Solution Approach 1:
The belt body is first manufactured as a solid square-cut core with standardized dimensions using conventional vulcanization processes. The V-shaped grooves are then machined into this pre-formed core, separating the manufacturing steps into a simple bulk formation phase followed by a precise but simpler groove cutting phase.
Solution Approach 2:
Instead of directly forming complex V-shaped rib structures during vulcanization, the invention inverts the approach by creating a simple square core first and then removing material to form the V-grooves. This inversion simplifies the primary manufacturing step while achieving the desired complex geometry through subtraction.
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 is thinner, lighter, and more efficient, capable of transmitting twice the power with a longer lifespan, reduced sensitivity to misalignment, and lower noise compared to conventional V-belts.
Implementation Method 1
placing the plied rubber in a curing vessel, vulcanizing the ply
Data Source
AI summary
The present invention provides V-ribbed transmission belt. The belt includes an upper portion with a top surface and a lower portion with a plurality of ribs spaced apart by V-shaped grooves. The upper portion may include a plurality of cords and a fabric cover on the top surface. The bottom surface of each of the ribs may comprise a fabric cover. The belt may have a smaller width to conventional V-ribbed belts while having less weight and providing greater power efficiency.