Hollow Frame Rib Reinforcement for Bicycle Rigidity
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Solution Overview
Problem
Bicycle and vehicle frames often suffer from flexing and twisting under heavy loads, leading to wasted pedaling force and reduced efficiency due to insufficient rigidity, particularly in stress areas like the head tube, bottom bracket, and seat tube.
Innovation Solution
A frame reinforcement assembly with a plurality of rib structures made of composite materials, such as carbon fiber, aluminum, or glass fiber, is integrated into the hollow interior of these tubes to provide stiffness, featuring a combination of horizontal and vertical ribs that are forged, stamped, welded, or 3D printed to enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional frame materials are used, then the frame is lighter, but the frame lacks sufficient rigidity and twists under heavy loads
Solution Approach 1:
The patent employs composite materials consisting of a matrix material (such as polymer, metal, or ceramic) reinforced with rib structures made of high-strength materials like carbon fiber, fiberglass, or metal. This composite construction provides enhanced rigidity and strength while maintaining lightweight properties, directly resolving the contradiction between frame rigidity and weight.
Solution Approach 2:
The frame is divided into multiple tubular members with hollow interiors, and each tube is further segmented into reinforcement ribs integrated within the hollow interior. This segmentation allows strategic placement of reinforcement materials in high-stress areas without uniformly increasing the weight of the entire frame structure.
2Strength
If heavier frame materials are used to increase strength, then the frame becomes more rigid, but the frame weight increases
Solution Approach 1:
The reinforcement ribs are strategically positioned within the hollow interiors of specific tubular members based on stress analysis. High-strength rib structures are placed in areas experiencing maximum stress (such as junctions and load-bearing regions), while other areas maintain lighter construction. This local quality approach ensures maximum strength where needed without uniformly increasing frame weight.
3Productivity
If the frame is made lighter, then the frame is more efficient for pedaling, but the frame becomes more prone to flexing and twisting
Solution Approach 1:
The patent adds a third dimension to the frame structure by integrating rib structures within the hollow interiors of tubular members. This internal reinforcement creates a multi-dimensional load-bearing architecture where the ribs provide structural support in directions perpendicular to the main tube axes, enhancing frame stability without adding external bulk or weight.
4Strength
If reinforcement structures are added to the frame, then the frame rigidity increases, but the frame complexity increases
Solution Approach 1:
The reinforcement ribs are nested within the hollow interiors of the tubular frame members. This nesting approach integrates the reinforcement structures into the existing frame architecture without requiring separate external components or complex assembly procedures. The ribs are embedded during manufacturing, creating a unified structure that appears simple from the outside while containing sophisticated internal reinforcement.
Data Source
AI summary
The present invention discloses a reinforced bicycle or vehicle frame comprising: a head tube portion for engaging a front fork and wheel; a bottom bracket portion for engaging a rear fork and wheel; a seat tube portion. Each of the head tube portion, the bottom bracket portion, and the seat tube portion being hollow, allowing for the installation of a frame reinforcement assembly to a hollow interior of each of the hollow head tube portion, the bottom bracket portion, and the seat tube portion or entire frame. The frame reinforcement assembly includes a plurality of ribs structure adapted to be approximately be perpendicular to each other. The plurality of ribs structure formed in the hollow interior and being composite material to provide stiffness to the hollow interior of each of the hollow head tube, the bottom bracket, and the seat tube portions.