Detachable Bicycle Accessory Bar for Convertible Frame Geometry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric bicycles require separate manufacturing of low step and step over frames, leading to increased production costs and inventory complexity due to the need for different frame designs, and lack efficient accessory mounting solutions that accommodate various frame sizes and components like batteries and cables.
Innovation Solution
A detachable accessory bar that mounts between the down tube and seat tube, allowing for adjustable length and pivotability, combined with a split dropout and internal cable routing system, to accommodate different frame sizes and simplify accessory mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate frame designs are used for low step and step over configurations, then each configuration can be optimized for its specific use, but manufacturing costs and inventory complexity increase
Solution Approach 1:
The frame is segmented into a main frame structure and a detachable accessory bar that can be added or removed. This allows the base frame to be standardized while the accessory bar provides the step-over functionality when attached, resolving the contradiction by separating the essential frame from the configuration-specific add-on.
Solution Approach 2:
The accessory bar serves multiple functions: it creates the step-over configuration when attached, provides accessory mounting capabilities, and can be removed to revert to the original low-step configuration. This multi-functionality allows a single frame design to serve both configuration types, reducing the need for separate frame designs.
2Adaptability or versatility
If separate frame designs are manufactured for different configurations, then each frame can be optimized for its purpose, but production costs and inventory management become more complex
Solution Approach 1:
By segmenting the step-over functionality into a separate detachable accessory bar, the main frame can be manufactured in a single standardized design. The accessory bar is manufactured separately and attached when step-over configuration is needed, simplifying main frame production while maintaining configuration flexibility.
Solution Approach 2:
The system transitions from static separate frame designs to a dynamic configuration where the accessory bar can be attached or removed based on user needs. This dynamic approach allows a single frame design to adapt to different configurations, reducing manufacturing complexity while maintaining versatility.
3Stability of the object's composition
If a rigid fixed-length bar is used, then structural stability is maintained, but adaptability to different frame sizes and accessory mounting needs is reduced
Solution Approach 1:
The accessory bar incorporates telescopic sections with locking mechanisms that allow the bar length to be adjusted and locked at different positions. This provides both adaptability to different frame sizes and maintained structural stability when locked, resolving the contradiction between rigidity and adjustability.
Solution Approach 2:
The bar's length parameter can be changed by extending or retracting the telescopic sections and locking them at desired positions. This parameter adjustability allows the bar to adapt to different frame sizes and accessory mounting requirements while maintaining stability through the locking mechanism.
4Reliability
If traditional cable routing is used, then cable protection is provided, but accessibility for cable installation and maintenance becomes difficult
Solution Approach 1:
The cable routing system is extracted from the frame interior and integrated into the detachable accessory bar. Cables can be routed through channels in the accessory bar, making them easily accessible for installation and maintenance by simply attaching or removing the bar, while still providing protection through the bar's structure.
Solution Approach 2:
The accessory bar acts as an intermediary that provides external cable routing channels. This mediator structure allows cables to be protected and organized while remaining easily accessible, as the bar serves as an intermediate platform between the frame and the external environment.
Data Source
AI summary
A sport utility bicycle includes a frame that includes a down tube, a seat tube, and a head tube. The bicycle also includes a detachable accessory bar that mounts between the seat tube and the down tube or the head tube. The detachable accessory bar includes a rear decoupling unit that mounts to the seat tube and a front decoupling unit that mounts to the down tube or the head tube. The detachable accessory bar also includes a bar with a plurality of slots sized to receive straps for securing accessories to the detachable accessory bar.