Double Bell-Shaped Caster Wheel for Turf-Friendly Maneuverability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional caster wheels for lawnmowers cause unsightly wheel marks, compact grass, and limit maneuverability due to their design, which can lead to getting stuck in small holes or obstacles, and debris accumulation.
Innovation Solution
A double bell-shaped caster wheel assembly with a center tread portion and double curvature, combined with a wheel mount featuring a spindle and bracket, and strategically placed magnets for improved mobility and debris resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional cylindrical caster wheel with a flat outer face is used, then the wheel structure is simple and easy to manufacture, but the wheel becomes stuck in small holes, ruts, and alongside vertical edge surfaces, limiting maneuverability
Solution Approach 1:
The patent applies curvature by replacing the traditional cylindrical wheel with a bell-shaped wheel that has a curved profile. The wheel features a rounded leading edge and a tapered trailing edge, creating a smooth curved surface that allows the wheel to roll over obstacles and escape from holes and ruts, significantly improving maneuverability while maintaining structural simplicity
2Object-affected harmful factors
If a traditional caster wheel is used, then the wheel design is simple, but the wheel compacts and lays down grass, creating unsightly wheel marks and limiting turf functionality
Solution Approach 1:
The patent applies local quality by creating a bell-shaped wheel with non-uniform cross-section. The wheel has a narrower width at the contact point with the ground compared to the overall wheel diameter, concentrating the contact area to minimize grass compaction and wheel marks while maintaining sufficient structural support
3Object-affected harmful factors
If a traditional caster wheel with adjacent bracket structure is used, then the wheel provides support, but grass and debris become stuck or trapped against the wheel and bracket, clogging up and limiting wheel rotation
Solution Approach 1:
The patent applies the extraction principle by removing the traditional adjacent bracket structure that causes debris accumulation. The bell-shaped wheel design integrates the mounting function directly into the wheel body, eliminating the separate bracket that would trap grass and debris, thereby preventing clogging and maintaining smooth wheel rotation
4Adaptability or versatility
If a traditional caster wheel is used, then the wheel provides basic rolling support, but the wheel cannot effectively climb over obstacles or escape from holes and ruts
Solution Approach 1:
The patent applies curvature through the bell-shaped wheel geometry with a rounded leading edge that enables the wheel to roll over obstacles and escape from holes and ruts. The curved profile allows the wheel to maintain contact with the ground while navigating uneven terrain, significantly improving adaptability without complex mechanical additions
Data Source
AI summary
A caster wheel assembly for an outdoor power equipment machine includes a wheel mount and provides a double bell-shaped caster wheel including two bell-shaped halves, each bell-shaped half includes a central hub, a smooth transition portion, an outer circumferential rim, and a planar face. A ground contacting tread can be provided by the outer circumferential rims. A ground contacting tread can be provided by a resilient tread ring positioned between the two bell-shaped halves.