Foldable Bicycle Frame With Parallel Wheel Folding Joint
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Solution Overview
Problem
Existing foldable bicycles are inconvenient to move after being completely folded, as they require lifting the entire frame due to non-parallel wheel arrangements, and previous designs lack continuous folding modes and ease of use.
Innovation Solution
A foldable bicycle with a main frame featuring a first and second connecting rod, a first folding joint forming an oblique junction between the front and rear wheels, allowing parallel alignment and easy folding, and a second folding joint for handlebar stem adjustment to facilitate movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the bicycle frame is folded completely to reduce volume, then the storage space is reduced, but the bicycle cannot be pushed to move and requires lifting the entire frame
Solution Approach 1:
The patent implements a dynamic folding mechanism where the front wheel assembly can rotate relative to the main frame through a folding joint, allowing the wheels to transition from a non-parallel arranged state to a parallel arranged state. This dynamic adjustment enables the bicycle to be pushed conveniently after folding without requiring lifting the entire frame, while still achieving significant volume reduction for storage.
Solution Approach 2:
The patent introduces an oblique junction between the first and second connecting rods that allows the front wheel assembly to be positioned in a different spatial dimension relative to the main frame. This dimensional change enables the wheels to be arranged parallel to each other even when the frame is folded, resolving the contradiction between compact storage and ease of movement.
2Volume of moving object
If traditional folding mechanisms are used to reduce bicycle volume, then the storage convenience is improved, but the operation becomes complicated due to non-continuous folding modes
Solution Approach 1:
The patent divides the folding mechanism into two main segments: the first folding joint between the main frame and front wheel rack, and the second folding joint between the front wheel rack and handlebar stem. These segmented folding joints provide continuous folding modes that simplify operation while achieving compact volume reduction, avoiding the complexity of non-continuous folding mechanisms.
3Volume of moving object
If the front wheel and rear wheel are arranged non-parallel to achieve folding, then the volume is reduced, but the bicycle cannot be pushed and requires lifting the entire frame
Solution Approach 1:
The patent implements a dynamic folding mechanism where the front wheel assembly can rotate relative to the main frame through a folding joint, allowing the wheels to transition from a non-parallel arranged state to a parallel arranged state. This dynamic adjustment enables the bicycle to be pushed conveniently after folding without requiring lifting the entire frame, while still achieving significant volume reduction for storage.
Solution Approach 2:
The patent introduces an oblique junction between the first and second connecting rods that allows the front wheel assembly to be positioned in a different spatial dimension relative to the main frame. This dimensional change enables the wheels to be arranged parallel to each other even when the frame is folded, resolving the contradiction between compact storage and ease of movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the bicycle to be easily carried and stored with reduced volume, allowing the front and rear wheels to be arranged parallel for convenient pushing and storage.
Implementation Method 1
an elastic member disposed between the engaging unit and the second outer shell
Data Source
AI summary
A foldable bicycle is disclosed herein which can be unlocked to fold. It comprises a main frame having a first connecting rod and a second connecting rod, a first folding joint between the first connecting rod and the second connecting rod and having a first outer shell, a second outer shell, an engaging unit, an elastic member, a press button and a cam locking member, a front wheel rack connected to a front end of the first connecting rod, a front wheel connected to the front wheel rack, and a rear wheel connected to a rear end of the second connecting rod.