Tiltable Bicycle Front Suspension with Composite Steering
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Solution Overview
Problem
Current bicycle suspension systems lack optimization for tilting and shock absorption, leading to stiff steering, instability, and potential safety hazards during cornering and bumpiness.
Innovation Solution
A tiltable bicycle front suspension system with shock absorption and composite steering, featuring a suspension structure with a tilting capability of 22 degrees, a main shock absorbing spring with a 100 mm stroke, and a steering structure that incorporates Ackerman geometry for improved steering accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If front suspension systems are added to bicycles, then shock absorption capability is improved, but steering stiffness increases and riding experience deteriorates
Solution Approach 1:
The suspension system is divided into independent left and right fork assemblies, each with separate shock absorption springs. This segmentation allows each side to operate independently, maintaining steering responsiveness while providing effective shock absorption for each wheel separately.
Solution Approach 2:
The fork arms are designed to be movable relative to the vehicle body through hinge connections, allowing dynamic adjustment of the suspension geometry during steering and suspension travel. This dynamic design maintains optimal steering characteristics while enabling shock absorption functionality.
2Stability of the object's composition
If tilting capability is added to the suspension system, then vehicle stability during turning is improved, but structural complexity increases
Solution Approach 1:
The tilting mechanism is merged with the existing fork arm structure. The fork arms naturally tilt during steering through their hinge connections to the vehicle body, combining the steering and tilting functions into a single integrated structure rather than adding separate tilting mechanisms.
Solution Approach 2:
The fork arm assembly serves multiple functions: it provides shock absorption through vertical movement, enables steering through horizontal rotation, and achieves tilting automatically through its hinge connection geometry. This multi-functionality reduces the need for additional dedicated components.
3Measurement precision
If Ackerman geometry is implemented in the steering linkage, then steering accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The steering linkage is designed to self-adjust to Ackerman geometry through its universal joint connections and swinging rod mechanism. The geometry emerges naturally from the mechanical constraints and motion paths of the components rather than requiring precise pre-setting of individual link lengths and angles.
Solution Approach 2:
The steering geometry parameters are determined by the operational positions of the universal joints and swinging rods rather than fixed manufacturing dimensions. This allows the Ackerman geometry to be achieved through the range of motion and mechanical constraints rather than requiring high-precision manufacturing of each component.
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
The system enhances vehicle stability by lowering and shifting the center of gravity, improves shock absorption to minimize the impact of cargo weight changes, and provides accurate and labor-saving steering, making the riding experience more akin to two-wheeled bicycles.
Implementation Method 1
an alignment spring is disposed between the upper fork arm and the lower fork arm
Implementation Method 2
a main shock absorbing spring is disposed between the lower fork arms
Data Source
AI summary
The present invention is intended to provide a tiltable bicycle front suspension system with shock absorption and composite steering, including a suspension structure and a steering structure, where the suspension structure includes a vehicle body and symmetrically-arranged front wheels; each front wheel is provided with a steering knuckle; a fork arm fixing frame is movably disposed at one side, far away from the front wheel, of the steering knuckle; an upper fork arm and a lower fork arm, which are arranged in pair, are disposed between the fork arm fixing frame and the vehicle body; an alignment spring is disposed between the upper fork arm and the lower fork arm; and a main shock absorbing spring is disposed between the lower fork arms. The system provided by the present invention can make the driving more accurate and more labor-saving.