Bicycle Wheel Fastening Assembly with Rotating Handle
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Solution Overview
Problem
Existing manual wheel fastening systems for bicycles require complex adjustments and are not intuitive for inexperienced users, often leading to improper operation and potential wheel separation, especially when trying to remove or re-install wheels.
Innovation Solution
A manually operated primary wheel fastening system that allows for simple rotation of a lever or wing nut for tightening, featuring an integrally formed drawbar member that is non-rotational and does not rely on thread-locking glue, enabling easy operation without instructions and ensuring the handle can be oriented rearward to avoid obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a quick release cam system is used, then wheel fastening can be achieved, but the system requires complex adjustments and is not intuitive for inexperienced users
Solution Approach 1:
The system separates the fastening function into two independent components: a drawbar that applies clamping force and a rotating handle that secures the drawbar position. This segmentation allows each component to have a simple, intuitive function while together they achieve secure wheel fastening without complex adjustments
Solution Approach 2:
The rotating handle automatically maintains proper orientation relative to the fork blade during rotation, eliminating the need for users to manually adjust or align components. The system self-adjusts as the user simply rotates the handle to tighten, making it intuitive for inexperienced users
2Adaptability or versatility
If a traditional quick release cam is used, then wheel fastening is achieved, but the handle cannot be oriented to avoid obstacles during riding
Solution Approach 1:
The handle is designed to rotate dynamically along with the drawbar during the fastening process, allowing it to achieve any orientation relative to the fork blade. This dynamic rotation capability enables the handle to be positioned optimally to avoid obstacles while maintaining a simple structural design
Solution Approach 2:
The rotating handle serves multiple functions: it applies rotational force to tighten the drawbar, maintains proper orientation relative to the fork, and can be positioned to avoid obstacles. This multi-functionality provides adaptability without increasing structural complexity
3Reliability
If thread-locking glue is used to prevent handle rotation, then fastening security is improved, but manufacturing and assembly complexity increases
Solution Approach 1:
The drawbar and handle are pre-designed with complementary geometric features (non-circular cross-sections or keyed connections) that prevent relative rotation between components. This preliminary design approach eliminates the need for thread-locking glue while maintaining fastening security and simplifying manufacturing
Solution Approach 2:
The patent replaces the chemical bonding method (thread-locking glue) with a purely mechanical solution using geometric interlocking features. This substitution maintains reliability by preventing handle rotation through mechanical means while significantly easing manufacturing and assembly processes
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 system provides a safe, intuitive, lightweight, and cost-effective solution for wheel fastening that is compatible with standard bicycle forks, allowing easy interchangeability of wheels and reducing the risk of wheel separation during operation.
Implementation Method 1
a drawbar with an integrally formed distal nut... The adjusting nut, when rotated, pulls the wheel mount against the hub
Implementation Method 2
the quick release cam, when locked, pulls the drawbar outward thereby pushing inward against the dropout
Data Source
AI summary
An assembly for the primary fastening of a bicycle or other wheeled vehicle wheel to wheel mount(s), as is commonly done by a cam operated quick release, incorporating a uniquely formed drawbar and a rotation handle wherein primary fastening is accomplished by simple rotation of the rotation handle about the drawbar axis.