Rotation Transmission Disc Web Structure for Lightweight Strength
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Solution Overview
Problem
Existing rotation transmission discs face challenges in achieving a balance between light weight and strength, particularly due to varying specifications and layouts required for different utilization conditions.
Innovation Solution
The rotation transmission disc design features intersecting crosspiece portions with specific angular ratios, integrated or coupled crosspiece inner circumferential portions, and weight-reducing features such as arcs and holes, allowing for stress dispersion and reduced weight while maintaining strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rotation transmission disc is made with a solid structure to secure strength, then strength is improved, but weight increases
Solution Approach 1:
The disc is divided into multiple crosspiece portions (first and second crosspiece portions) that intersect to form a web-like structure. This segmentation allows material to be distributed only where structurally necessary, creating weight reduction holes in non-critical areas while maintaining strength at stress-bearing intersections.
Solution Approach 2:
Different regions of the disc have different structural densities. The crosspiece portions and their intersections provide localized reinforcement where strength is needed, while the spaces between crosspieces are reduced or eliminated to decrease weight. The arc-shaped connections provide localized stress distribution at critical junctions.
2Ease of manufacture
If the disc structure is simplified to reduce manufacturing complexity, then ease of manufacture is improved, but adaptability to different specifications deteriorates
Solution Approach 1:
The disc design incorporates standardized elements (crosspiece portions, arc connections, weight reduction holes) that can be adapted to various disc sizes and applications. The modular structure allows the same basic design principles to be applied across different specifications, making the manufacturing process versatile rather than requiring completely different designs for each application.
Solution Approach 2:
The design allows for parameter variations such as changing the number, size, and distribution of crosspiece portions and weight reduction holes based on specific application requirements. These parameter changes enable adaptation to different load conditions, disc diameters, and material specifications while maintaining the core structural approach.
3Strength
If crosspiece portions are made longer to increase structural rigidity, then strength is improved, but weight increases
Solution Approach 1:
The connections between crosspiece portions utilize arc-shaped geometries rather than straight lines. These curved connections provide structural rigidity through their geometric form, distributing stresses more effectively along the arc path. The arcs maintain structural integrity while requiring less material than equivalent straight-line connections, thereby reducing weight.
Data Source
Figure 1~2
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AI summary
To provide a rotation transmission disc that achieves a light weight while securing strength. A rotation transmission disc 1 includes: an outer circumferential portion 2 on which a load acts when rotation is transmitted; a center opening portion 3 formed inside the outer circumferential portion; and a plurality of attachment holes 5 formed at positions projecting from the outer circumferential portion 2 to inside of the center opening portion 3 for attachment of the rotation transmission disc 1 to a rotating element. The plurality of attachment holes 5 are provided, and a first crosspiece portion 6 and a second crosspiece portion 7 are formed in each of ranges of divided angles formed by two adjacent attachment holes with respect to a center of the rotation transmission disc, the first crosspiece portion 6 extending from a load point, which is an intersection between a straight line extending in a radial direction to internally divide the divided angles at a predetermined angular ratio and a load radius position of the outer circumferential portion, to one of the attachment holes forming the divided angles, the second crosspiece portion 7 extending from the load point to the other attachment hole of the attachment holes forming the divided angles, and the first crosspiece portion 6 and the second crosspiece portion 7 inside a range of an adjacent divided angle intersect one another, and each of the attachment holes 5 is located in the intersecting region 8.