Bicycle Dropper Post Actuator Nesting for Compact Design
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Solution Overview
Problem
Conventional dropper post assemblies have limitations in accommodating varying rider heights and frame sizes, as they often require longer lengths to provide sufficient travel while maintaining stability, which can lead to increased overall length and reduced customization options.
Innovation Solution
A dropper post assembly design with a shorter normalized post length, featuring an actuator assembly that nests within the inner tube, reducing the effective actuator length and overlap length, allowing for a more compact retracted position and customizable drop length, while maintaining stability in the extended position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the dropper post assembly uses a longer length to provide sufficient travel while maintaining stability, then the stability is improved, but the overall length increases and customization options are reduced
Solution Approach 1:
The actuator assembly is nested within the inner tube when the inner tube is in the retracted position. The actuator body is received within the inner tube, and the cartridge rod is received within the actuator body, creating a compact nested configuration that reduces the overall length while maintaining stability through the telescopic structure.
Solution Approach 2:
The dropper post assembly uses a dynamic telescopic structure where the inner tube can slide within the outer tube to provide adjustable travel. The actuator assembly dynamically adjusts its position within the inner tube, transitioning between retracted and extended states to accommodate different travel requirements while maintaining stability.
2Adaptability or versatility
If the actuator assembly is made more compact to reduce overall length, then the customization options are improved, but the actuator length may be reduced
Solution Approach 1:
The actuator assembly is divided into separate components including the actuator body, cartridge rod, and actuation rod that can be independently configured. This segmentation allows for customized length configurations while maintaining a compact nested structure when retracted.
Solution Approach 2:
The dropper post assembly allows for parameter changes in terms of travel length and retracted length by adjusting the configuration of the inner tube and actuator assembly. The system can be customized to provide different drop lengths and retracted positions to accommodate various rider heights and frame sizes.
Data Source
AI summary
A dropper post assembly for supporting a bicycle seat can include an outer tube and an inner tube telescopically receivable in the outer tube and slidable within the outer tube between a retracted position in which a lower end of the inner tube is proximate a lower end of the outer tube and an extended position in which the lower end of the inner tube is axially spaced from the lower end of the outer tube. An actuator assembly may include an actuator body having a mounting portion connected to the lower end of the outer tube and a cartridge rod receiving portion, and may be configured so that when the inner tube is in the retracted position at least the upper surface of the cartridge rod receiving portion is nested within the inner tube.