Low-Profile Wheel Assembly with Rotating Carriage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wheel assemblies for dollies and decks are not sufficiently rugged, prone to wear, and require frequent replacement, while also being heavy and costly to manufacture, which affects stability and ease of movement.
Innovation Solution
A low-profile wheel assembly with a cylindrical wheel having a longer axis than diameter, mounted on a carriage that rotates within a shallow outer housing, reducing friction and distributing load evenly to minimize surface marking and damage, and featuring a design that protects vulnerable parts from impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wheel assemblies are made of rugged construction to minimize wear, then reliability is improved, but weight increases making dollies harder to move
Solution Approach 1:
The wheel assembly is divided into separate functional components: a rigid outer housing providing structural support and protection, a removable wheel unit containing the wheel and bearing, and a friction-reducing interface between them. This segmentation allows each component to be optimized independently - the outer housing can be lightweight while the wheel unit provides durability.
Solution Approach 2:
The wheel unit is nested within the outer housing, with the wheel mounted on a carriage that rotates within the housing. This nested configuration protects vulnerable parts from impact while maintaining a compact, lightweight structure. The carriage rotates concentrically within the outer housing, providing stability without requiring heavy construction.
2Strength
If wheel assemblies are made deeper to handle weight, then load capacity is improved, but dolly height increases reducing stability and increasing material costs
Solution Approach 1:
The wheel is designed with a cylindrical shape having a longer axis than diameter, creating a low-profile configuration. This curved geometry allows the wheel to handle heavy loads while maintaining a shallow depth, as the cylindrical form distributes weight efficiently along its length rather than requiring vertical height.
Solution Approach 2:
Instead of increasing wheel depth vertically to handle weight, the design shifts to a horizontal orientation with the wheel's longest dimension extending laterally. The carriage rotates within the housing in a horizontal plane, allowing load capacity to be achieved through horizontal geometry rather than vertical depth, thus maintaining low dolly profile and stability.
3Ease of manufacture
If wheel assemblies use standard deep configurations, then manufacturing is simpler, but material costs increase and stability decreases
Solution Approach 1:
The carriage is designed to rotate dynamically within the outer housing, allowing the wheel assembly to adapt to directional changes and lateral forces. This dynamic rotation mechanism provides stability and impact resistance without requiring excessive structural material, as the moving carriage absorbs and redirects forces rather than relying on static heavy construction.
4Strength
If wheel assemblies have high friction interfaces, then structural strength is improved, but steering smoothness and ease of operation deteriorates
Solution Approach 1:
A friction-reducing interface is introduced between the carriage and outer housing, acting as an intermediary that allows smooth relative rotation while maintaining structural integrity. This interface enables the carriage to rotate freely within the housing for smooth steering, while the outer housing itself provides the necessary structural strength and protection.
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 increased stability, reduced material costs, and longer lifespan by minimizing the risk of tipping and surface damage, while allowing smooth steering and directional change, making it suitable for heavy loads in tight spaces.
Implementation Method 1
a means of reducing friction surface enabling the carriage wheel unit to rotate about a second axis at an angle different from the first axis
Data Source
AI summary
A low profile wheel assembly suitable for use in dollies, decks or any other platform designed for moving freight or other heavy items. It includes a wheel, a carriage on which the wheel bracket is mounted for rotation about a first axis. The wheel carriage unit fits inside an outer housing unit of this wheel assembly and by means of low friction between the wheel carriage unit and the outer housing unit enabling the wheels carriage unit to rotate concentrically while inside the outer housing unit at a different axis than the first. In this manner and at the same time that the wheel is rolling on a surface, it can change directions of where it is rolling to.