Adjustable Bicycle Assembly with Expansion Lock
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Solution Overview
Problem
Existing adjustable bicycle seat post assemblies are often complex, unreliable, and difficult to operate or maintain, failing to provide efficient power efficiency and comfort for cyclists by not allowing easy adjustment of saddle height during riding.
Innovation Solution
A vertically-adjustable bicycle assembly featuring a first support with an interior surface and a second support that is slidably positioned within the first support, with an expansion portion that can move between expanded and retracted positions, allowing the second support to be selectively raised or lowered relative to the first support using a retention assembly and actuator, facilitating easy adjustment of the saddle or handlebar height while riding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustable seat post assemblies are provided, then saddle height can be adjusted for power efficiency and comfort, but the assemblies become overly complicated, unreliable and difficult to operate or maintain
Solution Approach 1:
The adjustable assembly is divided into two main supports (first support and second support) that can slide relative to each other, allowing independent adjustment of saddle height while maintaining structural integrity. This segmentation enables simpler individual components working together rather than a complex monolithic structure.
Solution Approach 2:
The second support is slidably positioned within the first support, creating a nested configuration where one component fits inside another. This nesting approach reduces overall complexity by eliminating the need for separate mounting structures and simplifies the adjustment mechanism to basic sliding motion.
2Adaptability or versatility
If existing adjustable seat post assemblies are used, then saddle height can be changed, but they are difficult to operate or maintain
Solution Approach 1:
The expansion portion can dynamically change between expanded and retracted states, allowing the assembly to transition between locked and adjustable configurations. This dynamic capability enables easy operation where the rider can adjust saddle height on-demand without complex locking mechanisms.
Solution Approach 2:
The expansion portion automatically engages with the interior surface of the first support when expanded, providing self-locking functionality without requiring additional actuators or complex control systems. This self-service mechanism simplifies operation and maintenance.
3Device complexity
If fixed saddle height is used, then assembly structure is simple, but power efficiency and comfort are compromised due to inability to adapt to terrain
Solution Approach 1:
The adjustable assembly transitions from a static fixed-height structure to a dynamic system where the second support can slide within the first support. This dynamic capability allows real-time adaptation to different terrain conditions while maintaining a relatively simple overall structure.
Solution Approach 2:
The saddle height parameter can be changed by sliding the second support to different positions within the first support. This parameter adjustability enables terrain adaptability without requiring a completely complex reconfigurable structure, as the basic sliding mechanism allows continuous height variation.
Data Source
AI summary
An adjustable assembly for a bicycle includes a first support having an interior surface and a second support slidably positioned within at least a portion of the first support. One of the first support and the second support is adapted to attach to a first bicycle portion, and the other of the first support and the second support is adapted to attach to a second bicycle portion. Further, the second support comprises an expansion portion configured to be moved between an expanded position and a retracted position. The expansion portion is configured to engage the interior surface of the first support when the expansion portion is in an expanded position. In addition, the first support is configured to be selectively moved relative to the second support when the expansion portion is permitted to assume a retracted position.