Payload Transport Device Hinge Assemblies for Uneven Terrain
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Solution Overview
Problem
Conventional load transportation robots face challenges in transmitting driving force to driving wheels on uneven surfaces, leading to instability and inefficiency in payload lifting and movement.
Innovation Solution
A payload transportation device with a lift-driving portion that includes a first assembly and a second assembly connected via hinge portions, featuring driving wheels that maintain constant contact with the ground, allowing stable lifting of payloads and accommodating uneven surfaces through deceleration and power transmission mechanisms that enable vertical lifting and rotation of the loading plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If driving wheels are used to move the payload on uneven ground, then mobility is improved, but driving force transmission becomes impossible when wheels cannot contact the ground
Solution Approach 1:
The driving wheels are made dynamically adjustable through a height-adjustment mechanism that allows the robot to adapt wheel height to ground conditions. This enables the wheels to maintain contact with uneven surfaces, ensuring reliable driving force transmission while preserving mobility across various terrain types.
Solution Approach 2:
The system changes the height parameter of the driving wheels based on ground surface conditions. By adjusting the wheel height to match uneven terrain, the robot maintains continuous ground contact for reliable power transmission while adapting to different mobility requirements.
2Power
If a complicated power transmission structure is used to lift the loading plate and payload, then lifting capability is improved, but device complexity increases
Solution Approach 1:
The lifting function is extracted as a separate, dedicated mechanism independent of the driving system. This allows the lifting capability to be optimized without adding complexity to the overall power transmission structure, as the lifting mechanism operates independently from the wheel drive system.
Solution Approach 2:
The power transmission system is segmented into independent driving and lifting subsystems. This segmentation allows each subsystem to be optimized separately, reducing overall complexity while maintaining both lifting capability and driving functionality.
3Stability of the object's composition
If the robot structure is designed for stable lifting, then payload stability is improved, but device height increases
Solution Approach 1:
The design transitions from vertical stacking to a more distributed spatial arrangement. By optimizing the horizontal layout and using foldable or adjustable structural elements, the robot achieves stable payload support without increasing overall height, effectively utilizing three-dimensional space more efficiently.
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
Ensures stable and efficient payload lifting and movement on uneven surfaces by maintaining constant wheel contact and coordinated lifting between assemblies, reducing the height of the device and allowing for flexible rotational angles of cam members.
Implementation Method 1
cam members (232, 233) rotated by the rotational shafts (231-1, 231-2), and lifting members (235, 236) configured to linearly move upward or downward due to rotations of the cam members (232, 233)
Data Source
AI summary
Disclosed is a payload transportation device for transporting a payload, which has a low height and in which driving wheels are configured to come into constant contact with a ground surface even when the ground surface is uneven. The payload transportation device includes a loading plate above which a payload is loaded, a lift-driving portion configured to generate a driving force to vertically lift the loading plate, a first assembly configured to support a bottom of one side of the loading plate and in which some components included in the lift-driving portion are provided, a second assembly configured to support a bottom of the other side of the loading plate and in which other components included in the lift-driving portion are provided, hinge portions configured to connect the first assembly to the second assembly in a hinge structure, at least a pair of driving wheels coupled to both sides of a bottom of any one of the first assembly and the second assembly, and a driving unit configured to rotate the driving wheels.