Flexible Projections for Vibration Damping in Fruit Harvesting Beaters
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Solution Overview
Problem
Existing fruit harvesting machine heads, particularly those for olive trees, face challenges in achieving high productivity while minimizing tree damage, operator vibration transmission, and energy consumption, with current designs either suffering from high vibrations and energy usage or material wear and stickiness issues.
Innovation Solution
A fruit harvesting beating machine head featuring a bar bearer with flexible projections and rigid bars, where the projections absorb vibrations and allow direct force transfer to the tree, using materials like thermoplastic polyurethane or elastomeric plastic for the bearer and rigid materials like metal or carbon fiber for the bars, optimizing elasticity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rigid bars are used in the beating machine head, then productivity is improved due to direct force transfer, but vibrations transmitted to the operator increase and energy consumption rises
Solution Approach 1:
The bar bearer is segmented into multiple flexible projections instead of a single rigid structure. Each projection acts as an independent vibration-absorbing element, allowing the system to maintain rigid bar connectivity while distributing and dampening vibration forces through the flexible projection segments.
Solution Approach 2:
Different parts of the bar bearer have different mechanical properties: the projections are made of flexible material (elastomer, rubber, or spring) while the bars remain rigid. This local differentiation allows the connection points to absorb vibrations while the bars maintain their force-transferring capability for productivity.
2Object-affected harmful factors
If flexible bars are used in the beating machine head, then vibrations are absorbed and tree damage is reduced, but productivity decreases due to lower force transfer efficiency
Solution Approach 1:
The bar bearer is divided into multiple flexible projections that provide localized flexibility at connection points while maintaining overall structural rigidity through the rigid bars, achieving a balance between vibration absorption and force transfer efficiency.
Solution Approach 2:
The bar bearer combines two different materials with complementary properties: flexible material (elastomer, rubber, or spring) for vibration absorption and rigid material for force transfer. This composite structure integrates the advantages of both flexible and rigid bars.
3Object-generated harmful factors
If elastic material is used for the bar bearer, then vibrations are absorbed, but the material wears out faster and requires frequent replacement
Solution Approach 1:
The bar bearer is segmented into replaceable flexible projections that can be individually replaced when worn, rather than replacing the entire bar bearer structure. This segmentation improves maintenance efficiency and system reliability.
Solution Approach 2:
The design allows changing the material parameters of the flexible projections (using elastomers, rubbers, or springs with different properties) to optimize both vibration absorption performance and durability based on specific application requirements.
4Reliability
If rigid material is used for the bar bearer, then durability is improved, but vibrations are not absorbed and are transmitted to the operator
Solution Approach 1:
The bar bearer has non-uniform material distribution: rigid material provides overall structural durability while localized flexible projections at critical connection points absorb vibrations. This local quality differentiation resolves the contradiction between durability and vibration absorption.
Solution Approach 2:
The bar bearer uses a composite construction combining rigid material for structural integrity and flexible material (elastomer, rubber, or spring) for vibration absorption, achieving both durability and harm reduction simultaneously.
5Productivity
If flexible projections with holes are used in the bar bearer, then vibrations are absorbed and productivity is maintained, but manufacturing complexity increases
Solution Approach 1:
The bar bearer is segmented into modular flexible projections that can be manufactured separately and assembled, simplifying the manufacturing process despite the complex overall structure. The segmentation allows for standardized production of projection components.
Solution Approach 2:
The flexible projections incorporate holes as a design parameter change that provides both structural functionality (mounting points for rigid bars) and vibration absorption capability, achieving multiple functions without proportionally increasing 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
This design enhances productivity, reduces operator fatigue, and increases battery autonomy by minimizing vibrations and energy consumption, while allowing easier tree navigation due to reduced resistance and longer service life.
Implementation Method 1
the flexible projections of the bar bearer absorb the vibrations generated on the bars so they are not transmitted to the shaft held by the operator
Data Source
Figure 1
Figure 2~3
AI summary
A fruit harvesting beating machine head (1) comprising a bar bearer (2) carrying bars (4) is disclosed. The bar bearer (2) has flexible projections (3) with holes (5), interposed between the bar bearer (2) and the bars (4), in which bars (4) are fixed of a material harder than that of the bar bearer (2) and the flexible projections (3).