Driverless Transport Device Independent Wheel Steering

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Solution Overview

Problem

Existing driverless transport devices face challenges in precisely aligning with pallets for collision-free pickup and delivery, leading to potential damage due to unforeseen pallet mispositioning.

Innovation Solution

The implementation of a driverless transport device with independently driven and steerable wheel units, coordinated by an electronic control unit, along with sensor systems for obstacle detection, allows for precise movement and alignment, enabling collision-free operation and precise pallet handling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If driverless transport device is used for automatic pallet handling, then productivity is improved, but risk of collision and damage increases due to unforeseen pallet mispositioning

Engineering Contradiction:
Improveautomatic pallet handling efficiencyVSAvoidcollision risk with pallets
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The sensor device detects pallet position and alignment before the transport device attempts to pick up or deliver the pallet. This preliminary detection allows the control unit to plan and adjust the movement trajectory in advance, ensuring collision-free operation while maintaining automatic handling productivity.

Inventive Principle:
Principle #10Preliminary action

2Measurement precision

If precise positioning system is implemented for collision-free pallet pickup, then measurement precision is improved, but device complexity increases

Engineering Contradiction:
Improvepallet positioning precisionVSAvoidpositioning system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical positioning systems with a sensor-based detection system combined with electronic control. The sensor device optically or non-contactly detects pallet position, and the control unit processes this information to control the transport device movement, achieving precise positioning with reduced mechanical complexity.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If all wheel units are independently driven and steerable, then ease of operation is improved, but device complexity increases

Engineering Contradiction:
ImprovemaneuverabilityVSAvoidwheel control system complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The electronic control unit serves multiple functions: it controls the drive units for movement, manages the steering of wheel units, coordinates sensor data processing, and regulates the lifting device. This multi-functionality achieves comprehensive maneuverability while avoiding the need for separate complex control systems for each function.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentEP2336075B1Driverless transport device
Publication Date: 2012.10.31 AMX AUTOMATION TECH
  • EP2336075B1 patent drawingFigure 1
  • EP2336075B1 patent drawingFigure 2~3
  • EP2336075B1 patent drawingFigure 4

AI summary

The invention relates to a driverless transport device (1) for the automatic conveying, picking up, and delivering of pallets (2), comprising a chassis (17) essentially U-shaped in plan view with two legs, wherein at least one steerable wheel unit (11) is arranged on each leg of the chassis. To enable gentle picking up, delivering, and transport of pallets, it is provided that at least one steerable wheel unit (11, 11') can be driven individually by at least one drive unit (7), wherein the steerable wheel unit (11, 11'), preferably each steerable wheel unit (11, 11'), has two wheels (7', 7").