Joined Wrapped V-Belt Hardness Layout for Stable High-Load Running
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Solution Overview
Problem
Existing wrapped joined V-belts face challenges in maintaining lateral pressure resistance, preventing interface separation and cracks, and ensuring stable running without belt inversion or overturn, especially in high load and long span layouts like large-scale agricultural machinery.
Innovation Solution
The wrapped joined V-belt design incorporates a plurality of wrapped V-belt portions with a tension member layer, a tension rubber layer, a compression rubber layer having a first and second layer with different rubber hardness, and an outside cloth. The rubber hardness of the tension rubber layer is higher than the second compression rubber layer, and the first compression rubber layer has a rubber hardness equal to or higher than the tension rubber layer, enhancing lateral pressure resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wrapped V-belt is used to reduce friction and protect the power transmission surface, then the belt durability is improved, but the lateral pressure resistance decreases leading to buckling deformation
Solution Approach 1:
The compression rubber layer is divided into two distinct layers: a first compression rubber layer with higher rubber hardness for providing lateral pressure resistance, and a second compression rubber layer with lower rubber hardness for maintaining flexibility and protecting the power transmission surface. This segmentation allows each layer to perform its specific function optimally.
Solution Approach 2:
Different regions of the compression rubber layer are given different rubber hardness values. The first compression rubber layer (outer peripheral side) has higher hardness for lateral support, while the second compression rubber layer (inner peripheral side) has lower hardness for flexibility. This local differentiation of material properties resolves the contradiction between durability and lateral pressure resistance.
2Power
If multiple V-belts are used together to transmit high power, then the power transmission capacity increases, but tension differences and unstable running occur
Solution Approach 1:
Multiple wrapped V-belt portions are joined together by coupling their outer peripheral sides using a joining member (reinforcing cloth) to form a single integrated joined belt. This merging ensures uniform tension distribution across all V-belts, preventing tension differences and unstable running while maintaining high power transmission capacity.
3Strength
If the rubber hardness of the compression rubber layer is increased to improve lateral pressure resistance, then buckling deformation is prevented, but the flexibility and ability to accommodate slip decreases
Solution Approach 1:
The compression rubber layer is designed with spatially varying rubber hardness: the first compression rubber layer on the outer peripheral side has higher hardness for lateral support, while the second compression rubber layer on the inner peripheral side has lower hardness for flexibility. This local quality differentiation resolves the contradiction between strength and adaptability.
Solution Approach 2:
The compression rubber layer is segmented into two functional layers with different hardness properties, allowing the outer layer to provide structural support while the inner layer maintains flexibility for slip accommodation during power transmission.
Data Source
AI summary
The present invention relates to a wrapped joined V-belt in which outer peripheral surfaces of a plurality of wrapped V-belt portions are coupled via a tie band, each of the wrapped V-belt portions includes a tension member layer, a tension rubber layer laminated at a belt outer peripheral side, a compression rubber layer laminated at a belt inner peripheral side, and an outside cloth covering an entire outer surface of the belt, and the compression rubber layer includes a first compression rubber layer laminated at the belt outer peripheral side and a second compression rubber layer laminated at the belt inner peripheral side, a rubber hardness of the tension rubber layer is higher than that of the second compression rubber layer, and a rubber hardness of the first compression rubber layer is equal to or higher than that of the tension rubber layer.