Bicycle Wheel Positioning with Replaceable Spring Rollers
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Solution Overview
Problem
Conventional bicycle wheel positioning devices, such as those using elastic cantilevers, lose resilience over time, leading to a widening gap that fails to securely hold the wheel rim, necessitating frequent replacement.
Innovation Solution
A bicycle wheel positioning device featuring two positioning units with roller units and springs, where the springs compress and rebound to securely hold the wheel, allowing individual replacement of the springs rather than the entire unit, and adjustable locking mechanisms to accommodate different wheel sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic cantilevers are used to clamp the wheel rim, then the wheel can be securely positioned initially, but the resilience decreases over time causing the clamps to fail to hold the wheel
Solution Approach 1:
The device divides the positioning function into two independent systems: a fixed positioning structure (case with clamps) and a replaceable elastic element (spring). This segmentation allows the spring to be replaced independently when its elastic properties degrade, extending the overall service life while maintaining reliable wheel retention.
Solution Approach 2:
The patent changes the material parameter from a permanently deforming elastic cantilever to a reusable spring that can be replaced. This parameter change allows restoration of the elastic properties by simply replacing the spring component, rather than replacing the entire positioning device.
2Reliability
If the entire positioning unit is replaced when the spring loses elasticity, then reliable positioning is restored, but the device complexity and cost increase
Solution Approach 1:
The positioning device is segmented into a permanent case structure and a replaceable spring component. This design enables selective replacement of only the worn spring rather than the entire unit, reducing complexity and cost of maintenance while restoring reliable wheel retention.
Solution Approach 2:
The patent implements a discarding and recovering strategy where the spring component is discarded when it loses elasticity and a new spring is installed. The permanent case structure is recovered and reused, minimizing waste and reducing overall device complexity.
3Device complexity
If fixed clamps are used to position the wheel, then the structure is simple, but the device cannot accommodate different wheel sizes
Solution Approach 1:
The patent introduces dynamic elements (movable clamps guided by slots and replaceable springs) to the otherwise simple case structure. This allows the clamps to adjust their position and apply appropriate force for different wheel sizes while maintaining the overall simplicity of the case design.
Solution Approach 2:
The case structure with movable clamps and replaceable springs achieves multi-functionality by accommodating various wheel sizes and types. The universal design allows a single device to serve multiple purposes while maintaining structural simplicity through standardized components.
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 device provides reliable and adjustable securement of bicycle wheels, extending the lifespan of the positioning units by allowing spring replacement and ensuring secure retention of the wheel even with varying sizes and accidental impacts.
Implementation Method 1
the at least one spring of each roller unit is compressed and the two roller units are resiliently moved away from each other. When the force is removed, the at least one spring of each roller unit rebounds and the two roller units move toward each other
Data Source
AI summary
A bicycle wheel positioning device includes a case and two positioning units. The two positioning units are respectively installed to the case and each include a roller unit and at least one spring. When the two roller units are applied by a force, the two roller units are pushed away from each other. When the force is removed, the roller units move back and toward each other by the at least one spring in each roller unit.