Quadricycle Suspension with Angled Shock Absorbers for Leaning
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Solution Overview
Problem
Pedal-powered quadricycles lack a suspension system that allows for leaning into turns, which increases the risk of tipping over on uneven surfaces and fails to maintain contact with the ground at all times, especially in slippery conditions.
Innovation Solution
A quadricycle with a suspension system featuring a pivotable mount, hingedly secured upper and lower arms, and angled shock absorbers that provide both vertical and horizontal force components to maintain contact with the ground and allow leaning during turns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rigid axle suspension system is used in a quadricycle, then the structural simplicity is maintained, but the ability to maintain contact between all four wheels and the ground on uneven surfaces deteriorates
Solution Approach 1:
The suspension system is divided into independent segments - each wheel assembly operates independently with its own shock absorber and mounting structure. This allows each wheel to adapt to ground conditions separately while maintaining overall vehicle stability, resolving the contradiction between simple structure and reliable wheel contact.
Solution Approach 2:
The suspension system introduces dynamic elements including pivotable mounts that allow the vehicle body to lean into turns, and shock absorbers that dynamically adjust to terrain variations. This dynamic capability enables the quadricycle to maintain wheel-ground contact on uneven surfaces without requiring a complex rigid suspension structure.
2Stability of the object's composition
If a fixed-frame quadricycle design is used, then structural stability is maintained, but the ability to lean into turns and resist centrifugal forces deteriorates
Solution Approach 1:
The frame structure incorporates dynamic capabilities through pivotable mounts that enable the vehicle body to lean into turns. This allows the quadricycle to adapt to turning conditions by leaning against centrifugal forces, while the overall frame structure maintains its structural stability through properly positioned pivot points and support elements.
Solution Approach 2:
The frame structure serves multiple functions: it provides structural stability for rider safety, enables leaning motion for turn negotiation, and supports the suspension system. This multi-functionality resolves the contradiction between structural stability and turning adaptability.
3Volume of moving object
If vertical shock absorbers are used in a narrow structure, then space efficiency is improved, but the ability to provide both vertical and horizontal force components for leaning into turns deteriorates
Solution Approach 1:
The shock absorbers are positioned and angled asymmetrically relative to the vehicle centerline, allowing them to provide both vertical support and horizontal force components during turning. This asymmetric arrangement enables leaning capability while maintaining a compact suspension assembly volume.
Solution Approach 2:
The shock absorber mounting geometry is designed to operate in multiple dimensions - providing vertical force for suspension and horizontal force components for leaning into turns. This multi-dimensional force capability is achieved through strategic positioning and angling of the shock absorbers within a compact space.
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 suspension system enhances stability on uneven terrain, prevents rollovers, and improves safety by maintaining contact between all wheels and the ground, while enabling safe navigation of curves by allowing the vehicle to lean into turns.
Implementation Method 1
A shock absorber extends from either the lower arm or the upper arm to the frame
Implementation Method 2
The mount is permitted to pivot with respect to the frame in order to increase the flexibility of the suspension system... allowing the vehicle to lean into turns
Data Source
AI summary
A quadricycle includes a four-wheel suspension system that is structured to maintain contact between the ground and the wheels when traversing uneven terrain, as well as to permit a rider to lean into a curve in order to facilitate steering the vehicle. The suspension assemblies are relatively wide to resist rollover accidents. Shock absorbers within the suspension assemblies are angled from vertical to provide both a vertical force component and a horizontal force component in order to permit leaning into a curve while resisting excessive leaning. The quadricycle's drivetrain is structured to increase clearance between the ground and many drivetrain components. Smaller components of the spindle and wheel hub assembly are protected by larger components of the suspension assembly.