AGV Suspension Arms for Load Stability on Uneven Surfaces

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Solution Overview

Problem

Current suspension systems for automated guided vehicles (AGVs) cause instability during acceleration and deceleration, leading to potential load instability and accidents, especially on uneven surfaces.

Innovation Solution

A suspension system comprising pivotable longitudinal and transverse arms that decouple the chassis from the wheels, allowing the arms to pivot independently and absorb impulses, maintaining the load in a stable, planar orientation despite uneven surfaces and movements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If current suspension systems are used to adapt to uneven surfaces, then the AGV can traverse rough terrain, but the load becomes unstable during acceleration and deceleration

Engineering Contradiction:
Improveability to traverse uneven surfacesVSAvoidload stability
Core Design Contradiction:
Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The suspension system is divided into independent longitudinal and transverse arm assemblies, each capable of pivoting separately. This segmentation allows the system to adapt to uneven surfaces through independent arm movement while maintaining load stability through coordinated pivoting action.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The pivotable arms act as intermediary elements between the wheels and the load. These arms absorb and isolate impulses from uneven surfaces and acceleration/deceleration forces, preventing direct transmission to the load while still enabling terrain adaptation.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Device complexity

If rigid coupling between wheels and chassis is used, then the AGV structure is simple, but the load experiences instability on uneven surfaces

Engineering Contradiction:
Improvesuspension system structureVSAvoidload stability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The suspension system employs dynamic pivotable connections between the arms and the chassis, replacing rigid fixed couplings. This allows the system to actively adapt to changing terrain conditions and motion states, maintaining load stability through controlled movement rather than rigid constraint.

Inventive Principle:
Principle #15Dynamics

3Stability of the object's composition

If independent pivotable arms are introduced to stabilize the load, then the AGV can maintain load stability on uneven surfaces, but the suspension system becomes more complex

Engineering Contradiction:
Improveload stabilityVSAvoidsuspension system structure
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The longitudinal and transverse arm assemblies are merged into an integrated suspension system that works cooperatively. This combination allows the system to handle both longitudinal and lateral instability, providing comprehensive load stabilization while sharing structural components to manage complexity.

Inventive Principle:
Principle #5Merging (Combining)

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 stability and traction by isolating the chassis from uneven surface impulses and maintaining the load's stability, reducing the risk of accidents and load displacement during AGV movement.

Implementation Method 1

The suspension system decouples the wheels or other movement structures of the AGV from the load supported by the AGV such that the load is held substantially level and/or stable

Methodology Applied
Scientific EffectGravitation: Gravitation

Data Source

PatentUS11066283B2Suspension system for an automated guide vehicle
Publication Date: 2021.07.20 LOGISTICS & SUPPLY CHAIN MULTITECH R&D CENT LTD
  • US11066283B2 patent drawing
  • US11066283B2 patent drawing
  • US11066283B2 patent drawing

AI summary

A system and a method for an automated guided vehicle for transporting one or more objects, the automated guided vehicle including a chassis; a suspension system, the suspension system including a first arm coupled to the chassis via a first coupling and a second arm coupled to the chassis via a second coupling; the first arm pivotable relative to the chassis and about a first pivot axis; the second arm pivotable relative to the chassis and about a second pivot axis; one or more first movement structures associated with the first arm; one or more second movement structures associated with the second arm; the second arm arranged transverse relative to the first arm, the first pivot axis and second pivot axis are transverse to each other.