Modular Rotating Shaft Segmented Aluminum Sectors
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Solution Overview
Problem
Existing rotating shafts for mechanical handling face challenges in achieving optimal cross-sectional thickness and minimizing production costs and waste material, particularly for larger diameters, leading to increased weight and production costs, and reduced rotational speed.
Innovation Solution
A modular rotating shaft composed of multiple longitudinally arranged and coupled aluminum sectors, with shaped edges and pins for stabilization, allowing for precise thickness control and reduced waste through extrusion, and optional reinforcement with a composite shim for enhanced payload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the tubular shaft body is increased to improve strength and resistance to stresses, then the shaft can handle heavier loads, but the weight of the shaft increases excessively, forcing motor oversizing and reducing production costs
Solution Approach 1:
The shaft is divided into multiple longitudinal sectors that are coupled together to form the complete tubular structure. This segmentation allows each sector to be produced separately by cost-effective extrusion processes, while the assembled structure achieves the required strength through the combined action of all sectors, avoiding the need for excessive thickness in a single monolithic structure.
Solution Approach 2:
The shaft employs a composite structure combining multiple aluminum sectors with coupling elements and reinforcing ribs. This composite approach enables the structure to achieve high strength-to-weight ratio by optimizing the distribution of material where it is most needed, rather than uniformly increasing thickness throughout the entire shaft body.
2Shape
If shafts with larger cross-section are produced from full metal bars by drilling, then tubular bodies can be obtained, but production costs increase and waste material is enormous
Solution Approach 1:
Instead of starting with a solid bar and removing material through drilling, the shaft is segmented into multiple longitudinal sectors that are each extruded directly into their final tubular shape. This eliminates the need for material removal and dramatically reduces waste, as each sector is formed with the exact tubular geometry required.
Solution Approach 2:
The tubular shape is created during the extrusion process itself, before assembly. The sectors are pre-formed with the correct hollow cross-section and coupling features, so that no subsequent material removal is needed. This preliminary shaping action prevents waste generation rather than correcting it later.
3Strength
If the thickness of the tubular body is increased to improve strength, then the shaft can handle heavier loads, but the production costs increase considerably
Solution Approach 1:
The shaft is divided into multiple longitudinal sectors that are each produced by cost-effective extrusion processes. This segmentation allows for standardized, high-volume production of individual sectors, reducing per-unit costs compared to producing a single large-thickness shaft. The sectors are then assembled using coupling elements, avoiding the need for expensive heavy-wall extrusion or machining.
Solution Approach 2:
The shaft employs a composite structure combining multiple aluminum sectors with coupling elements and reinforcing ribs. This composite approach enables the structure to achieve high strength-to-weight ratio by optimizing the distribution of material where it is most needed, rather than uniformly increasing thickness throughout the entire shaft body.
4Weight of moving object
If lighter materials such as aluminum are used to reduce weight and production costs, then production costs decrease, but shafts with larger cross-section require complex production methods
Solution Approach 1:
The shaft is divided into multiple longitudinal sectors that are each produced by cost-effective extrusion processes. This segmentation allows for standardized, high-volume production of individual sectors, reducing per-unit costs compared to producing a single large-thickness shaft. The sectors are then assembled using coupling elements, avoiding the need for expensive heavy-wall extrusion or machining.
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 modular design facilitates cost-effective production with reduced waste and weight, enabling higher rotational speeds and improved mechanical performance while maintaining structural integrity.
Implementation Method 1
coupling means on each side edge of a respective one of the longitudinal sectors with the corresponding side edge of the adjacent longitudinal sector
Data Source
Figure 1~5
Figure 2~4
AI summary
Rotating shaft for the transmission of rotary motion from a motor and comprising a substantially tubular body (2). The rotating shaft (1) consists of a plurality of longitudinal sectors (3) that develop throughout the entire length of the tubular body (1), and coupling means (10) of each side edge (12) of a respective one (13) of said longitudinal sectors (3) with the corresponding side edge (12) of the adjacent longitudinal sector (14).