Removable Bicycle Frame Tube With Coaxial Clamping Joint
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Solution Overview
Problem
Existing bicycle frames are not adaptable, requiring complex assembly and disassembly processes, lack mechanical integrity, and are not eco-friendly, making it difficult to switch between different types of bicycles or add electric assistance.
Innovation Solution
A removable frame tube system using a coaxial clamping system with fixing rings and clamping wedges for easy assembly and disassembly, allowing quick adaptation to various bicycle types without welding or brazing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional welding or brazing is used to join frame tubes, then mechanical strength and structural integrity are improved, but adaptability and ease of disassembly deteriorate
Solution Approach 1:
The bicycle frame is divided into separate modular components (tubes and fittings) that can be independently replaced or reconfigured. The fixing ring with external threads on the tube and internally threaded fitting create separable connection points, allowing the frame to be disassembled and reassembled in different configurations without compromising structural integrity when properly fastened.
Solution Approach 2:
The connection system uses threaded fastening with adjustable parameters (thread pitch, clamp position, fastening torque) to achieve both strong mechanical bonds and easy disassembly. The clamping mechanism transforms the connection state between tightly secured (for strength) and easily separated (for adaptability) through parameter adjustment.
2Stability of the object's composition
If permanent welding or brazing is used to join frame tubes, then structural integrity is improved, but ease of repair and component reuse deteriorate
Solution Approach 1:
The frame components are segmented into replaceable modules where individual tubes can be detached from fittings using the threaded fixing ring system. This allows damaged components to be replaced without affecting the entire frame structure, significantly improving ease of repair while maintaining structural integrity through proper fastening of remaining components.
Solution Approach 2:
The design enables individual frame components to be discarded (removed) and recovered (reused) independently. The standardized fitting and fixing ring interface allows tubes to be removed and installed in different frame configurations or reused in other applications, promoting component reuse and reducing waste.
3Adaptability or versatility
If complex fastening mechanisms are used to enable removable tubes, then adaptability is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The fixing ring integrates multiple functions into a single component: it provides the external threads for engagement with the fitting, the clamping surface for securing the tube, and the fastening interface for the set screw. This merging of functions reduces the number of separate parts and simplifies the assembly process while maintaining adaptability.
Solution Approach 2:
The fitting design with internal threads and clamping mechanism serves multiple purposes: it accepts tubes with the standardized fixing ring interface, provides structural support, enables adjustable positioning, and allows for secure fastening. This multi-functionality reduces the need for specialized components for each function, simplifying the overall system.
4Adaptability or versatility
If traditional detachable frame designs with multiple components are used, then adaptability is improved, but mechanical strength and cohesion deteriorate
Solution Approach 1:
The fixing ring merges the tube end, external threading, and clamping interface into a single integrated component that works with the fitting to create a strong unified connection. This reduces the number of separate mechanical components at the joint, improving cohesion and mechanical strength while maintaining the ability to detach and reconfigure.
Solution Approach 2:
The connection system combines different material properties and fastening mechanisms (threaded metal-to-metal engagement, friction-based clamping, and set screw pressure) to create a composite fastening system that achieves both high mechanical strength and easy disassembly, overcoming the limitations of single-mechanism connections.
Data Source
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AI summary
The present invention relates to a removable tube (1) for a bicycle frame, which tube extend longitudinally along an axis (A) and comprises at least one attachment ring (2) having an inner radial surface (24) extending annularly around an outer wall (12) of the tube, thereby defining an outwardly open radial space (22) between the outer wall (12) and the inner radial surface (24), which space (22) is provided so as to receive a frame connector (4) with which the tube (1) can be removably assembled, the attachment ring (2) further comprising internal attachment means (20) at the inner radial surface (24). The invention also relates to a method for reversibly assembling the removable tube (1) with a connector (4) of an adaptable bicycle frame.