Magnetic Wheel Support for Trolley Cases to Absorb Vibration

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Solution Overview

Problem

Existing support devices for transportable containers, such as trolley cases, fail to effectively absorb impacts and vibrations on uneven surfaces while maintaining a balance between weight and mechanical strength, leading to user fatigue and potential breakage.

Innovation Solution

A support device using magnetic elements arranged to generate a repulsive force between two parts, providing a suspension effect without mechanical components, which can be adjusted by elastic elements, magnetic strength, or electromagnets to accommodate varying weights and prevent attraction to metal objects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If mechanical springs and shock absorbers are used for suspension, then vibration absorption capability is improved, but device complexity and weight increase

Engineering Contradiction:

Improvevibration absorptionVSAvoidmechanical parts

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent replaces the traditional mechanical spring and shock absorber system with a magnetic field-based suspension system. Magnets embedded in the base plate and interacting with ferromagnetic materials in the wheel assembly create magnetic repulsion and attraction forces that provide suspension and vibration absorption without mechanical contact parts, thereby reducing device complexity while maintaining vibration absorption capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention extracts and eliminates the mechanical spring and shock absorber components from the suspension system, retaining only the essential functional elements (magnets and ferromagnetic materials) needed to achieve vibration absorption. This extraction simplifies the overall device structure while preserving the core vibration mitigation function.

Inventive Principle:

Principle #2Taking out (Extraction)

2Object-affected harmful factors

If mechanical suspension components are used, then vibration absorption is improved, but weight increases leading to user fatigue

Engineering Contradiction:

Improveimpact absorptionVSAvoidsuspension device weight

Core Design Contradiction:

Object-affected harmful factorsVSWeight of moving object

Solution Approach 1:

The patent substitutes heavy mechanical suspension components with a magnetic field-based system that uses electromagnetic interaction rather than physical mass. The magnets and ferromagnetic materials create sufficient suspension force with minimal weight, significantly reducing the overall weight of the suspension device while maintaining impact absorption capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Force

If magnetic elements are used without insulation, then magnetic force is maximized, but metal objects on ground are attracted causing safety issues

Engineering Contradiction:

Improvemagnetic forceVSAvoidmetal object attraction

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent applies magnetic insulation selectively only in the regions where magnets are embedded in the base plate, rather than insulating the entire device. The insulation material covers only the lateral surfaces of the magnets, allowing magnetic force to act vertically on the ferromagnetic materials in the wheel assembly while preventing lateral attraction of metal objects on the ground. This localized application maintains magnetic effectiveness while eliminating safety hazards.

Inventive Principle:

Principle #3Local quality

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 solution provides a robust, lightweight suspension system that effectively absorbs shocks and vibrations, reducing user fatigue and preventing breakage, while maintaining a balance between weight and mechanical strength.

Implementation Method 1

The at least two magnetic elements are arranged opposite so as to generate a magnetic force of repulsion between the two parts, aimed at keeping the two parts stably in a condition of maximum distancing therebetween

Methodology Applied

Scientific EffectMagnetic force of repulsion: Magnetism

Implementation Method 2

at least one elastic element is provided which generates an elastic force in order to regulate the magnetic force of repulsion between the two parts

Methodology Applied

Scientific EffectElastic force: Elasticity

Data Source

PatentUS11910898B2Support device for wheels of transportable containers, such as trolley cases or the like

Publication Date: 2024.02.27 SCHEDONI LUXURY GOODS SRL

AI summary

A support device for wheels of transportable containers, such as trolley cases or the like, has at least two parts fixed to each other, including a first and a second part, so that the two parts have a relative movement therebetween, from a condition of maximum approach to a condition of maximum distancing. The first part is integral with the container and the second part is formed by an arm adapted to support at least one wheel, rotatably fixed to the arm. Furthermore, the first and the second part each have at least one magnetic element, and the at least two magnetic elements are arranged in opposite positions so as to generate a magnetic force of repulsion between the two parts, aimed at permanently maintaining the two parts in a condition of maximum distancing.