Toy Vehicle Wheel Device with Asymmetric Magnetic Attraction
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Solution Overview
Problem
Conventional toy vehicle wheel devices experience increased magnetic resistance and motor load during curve travel due to uneven wheel rotation speeds, leading to potential wheel slippage and inefficient energy consumption.
Innovation Solution
A wheel device design featuring a first wheel with a synthetic resin main body and flange, and a second wheel with a magnetic main body and flange, where the second wheel is designed to attract with magnetic force, allowing both wheels to alternately contact different rails, thereby maintaining consistent magnetic resistance during straight and curved travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both wheels are made to attract with magnetic forces, then the toy vehicle can travel stably on straight rails, but during curve traveling one wheel slips and magnetic resistance increases causing motor load increase
Solution Approach 1:
The patent divides the magnetic attraction function into segments: only one wheel (the outer wheel during curves) is equipped with magnetic attraction capability, while the inner wheel lacks this function. This segmentation allows the vehicle to maintain stable straight travel through magnetic attraction while avoiding excessive magnetic resistance during curves, as the inner wheel can slip freely without magnetic drag.
Solution Approach 2:
The patent applies magnetic attraction locally to only one wheel rather than both wheels uniformly. The outer wheel is equipped with magnets to provide localized magnetic attraction at the outer rail contact point during curves, while the inner wheel remains non-magnetic. This local quality approach reduces overall magnetic resistance during curve traveling while maintaining sufficient attraction for stable straight travel.
2Device complexity
If both wheels rotate at the same speed due to fixed axle connection, then the axle structure remains simple, but during curve traveling the inner or outer wheel may slip on the rail
Solution Approach 1:
The patent converts the harmful effect of wheel slippage into a beneficial feature by making the inner wheel non-magnetic. The inner wheel's ability to slip during curves is no longer a problem causing magnetic resistance and motor overload, but rather a beneficial mechanism that allows the wheel to rotate freely without magnetic drag, while the magnetic outer wheel maintains stable contact with the rail.
3Speed
If one wheel slips during curve travel, then the wheel can rotate at appropriate speed, but the magnetic resistance becomes large equating to braking state
Solution Approach 1:
The patent segments the magnetic attraction function so that only the outer wheel during curves possesses magnetic attraction capability. This allows the inner wheel to slip and rotate at the appropriate slower speed for curve travel without experiencing magnetic resistance, while the outer wheel maintains controlled magnetic attraction for stable rail contact.
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 reduces magnetic resistance and motor load during curve travel, ensuring balanced and efficient movement of the toy vehicle by maintaining consistent magnetic force interaction with the rails.
Implementation Method 1
at least the second wheel main body is formed of a member attracting with a magnetic force
Data Source
Figure 1(a)~1(c)
Figure 2(a)~2(b)
Figure 3
AI summary
To provide a wheel device for a toy vehicle, in which one of a pair of wheels rolling on a pair of metal rails attracts with a magnet to reduce resistance caused by magnetic force and suppress load on a motor. The wheel device 1 includes a first axle 2, and a first wheel 10 and a second wheel 20 provided on opposite sides of the first axle 2. The first wheel 10 includes a first wheel main body 11 rolling on one of the rails 261 and a first flange 12 guided by the one rail. The second wheel 20 includes a second wheel main body 21 rolling on the other of the rails 261 and a second flange 22 guided by the other rail. The second wheel main body 21 is formed of a magnet.