Variable Height Telescopic Fork for Adjustable Wheel Sizes
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Solution Overview
Problem
Existing bicycle and tricycle front fork systems either have rigid geometry or uniform shock absorption, failing to accommodate varying wheel sizes and provide adjustable height, limiting user customization and adaptability.
Innovation Solution
A variable height infinitely adjustable front fork system with telescopic blade assemblies and a lockable gas spring or screw actuator, allowing for telescopic displacement and height adjustment between the steerer tube and wheel connectors, accommodating different wheel sizes and providing customizable geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigid fork is used, then the bicycle has uniform front to rear geometry, but the fork cannot accommodate varying wheel sizes or provide height adjustment
Solution Approach 1:
The fork transitions from a rigid static structure to a dynamic adjustable structure with telescopic blade assemblies that can change length. The inner and outer blade units can telescope relative to each other, allowing the fork height to be adjusted while maintaining structural integrity during operation.
Solution Approach 2:
The fork blade is divided into multiple telescopic segments (inner blade unit and outer blade unit) that can move relative to each other. This segmentation allows the fork to adjust its effective length to accommodate different wheel sizes while maintaining a compact form when not in use.
2Adaptability or versatility
If a suspension fork is used, then shock absorption is provided, but the fork still maintains uniform front to rear geometry and cannot be adjusted to varying heights
Solution Approach 1:
The suspension fork is enhanced with dynamic height adjustability through telescopic blade assemblies. The inner blade unit can telescope within the outer blade unit, allowing the overall fork height to be changed while maintaining the suspension functionality and shock absorption characteristics.
Solution Approach 2:
The fork combines multiple functions: suspension shock absorption, height adjustment, and wheel size accommodation. The same telescopic mechanism that provides height adjustability also works with the suspension springs to maintain shock absorption across different fork lengths and wheel sizes.
3Adaptability or versatility
If variable shock absorption is added, then the amount of absorption can be adjusted, but the front to rear geometry remains unchanged and wheel size accommodation is not provided
Solution Approach 1:
The fork geometry becomes dynamically customizable through telescopic blade assemblies that can change the effective length of the fork. This allows the front to rear geometry to be adjusted to match different wheel sizes and rider preferences while maintaining variable shock absorption capabilities.
Solution Approach 2:
The fork allows changes in multiple geometric parameters simultaneously: length adjustment through telescoping blades, wheel size accommodation through adjustable dropouts, and shock absorption adjustment through suspension springs. These parameter changes are coordinated to maintain proper bike geometry for different applications.
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
Enables user-adjustable fork height and wheel size compatibility, enhancing user control over bicycle/tricycle geometry and accommodating various wheel sizes between 16 and 20 inches, with infinite adjustability and secure mounting options.
Implementation Method 1
The inner and outer blade units of the first telescopic blade assembly comprise opposing ones of either a piston rod or cylinder of a lockable gas spring assembly
Implementation Method 2
an inner blade unit telescopically mated with the outer blade unit for displacement of the inner blade member back and forth within the hollow interior the outer blade unit to retract and extend the inner blade unit relative to the outer blade unit
Data Source
AI summary
A variable height, infinitely adjustable front fork system that can adapt to various wheel sizes. On traditional front bicycle fork system, to change the tire size require a change in the fork, and to change the height of the fork relative to the frame that hold the front fork would require again a change to the fork. This new fork system addresses these two concerns. With a push of a button, or simple manipulation of a handle, the height of the fork relative to the frame can be made via a telescopic fork blade design. To accommodate different tire sizes, a user simply re-positions a pair of clamp-on wheel dropouts along a lower half of the telescopic blades.