Dual Chassis Transport Vehicle with Sliding Guide for Payload Stability
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Solution Overview
Problem
Conventional transport vehicles face instability issues due to pitching or suspension compression when carrying payloads, leading to potential toppling and loss of traction, especially when encountering undulations in the floor surface.
Innovation Solution
A transport vehicle design featuring a primary and secondary chassis with a guide arrangement and suspension system, where the secondary chassis slides along linear guides and positive stops, distributing payload weight across castor and drive wheels to maintain stability and traction, regardless of payload weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the suspension arrangement couples the chassis to castor wheels, then the transport vehicle can accommodate floor undulations, but the vehicle pitches about the suspension coupling points causing payload toppling
Solution Approach 1:
The vehicle is divided into two separate chassis: a primary chassis that remains stationary and a secondary chassis that moves with the suspension. This segmentation isolates the pitching motion to the secondary chassis only, preventing payload toppling while maintaining adaptability to floor undulations through the suspension arrangement coupling the secondary chassis to the drive wheels.
Solution Approach 2:
The secondary chassis acts as an intermediary element between the primary chassis and the suspension arrangement. It absorbs the pitching motion caused by suspension compression and extension, preventing this motion from being transmitted to the payload and maintaining overall vehicle stability.
2Force
If the suspension springs compress to maximum level due to heavy payload, then the vehicle can support the weight, but the wheels lose contact with the floor surface causing loss of traction
Solution Approach 1:
The wheel support system is segmented into two independent sets: first set of wheels coupled to the primary chassis and second set of wheels coupled to the secondary chassis. This ensures that when the suspension springs compress under heavy payload, the first set of wheels remains in contact with the floor, maintaining traction while the second set accommodates the payload weight through suspension compression.
Solution Approach 2:
The first set of wheels provides a counterbalancing support function that compensates for the suspension compression of the second set of wheels. When the payload causes maximum suspension compression and the second wheels lose contact, the first wheels maintain floor contact and provide the necessary counterweight support to prevent complete loss of traction.
3Device complexity
If a single chassis design is used, then the device complexity is reduced, but the vehicle cannot maintain stability with varying payload weights
Solution Approach 1:
The secondary chassis is designed to slide dynamically along the guide arrangement, allowing its position to adjust automatically based on payload weight. When payload weight increases, the secondary chassis slides to accommodate the additional load, maintaining vehicle stability without requiring a completely redesigned chassis structure for different payload scenarios.
Solution Approach 2:
The dual chassis system serves multiple functions: the primary chassis provides stable mounting for the guide arrangement and first set of wheels, while the secondary chassis accommodates varying payload weights through suspension compression and sliding motion. This multi-functional design allows a single vehicle structure to handle varying payload weights effectively.
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 design ensures stable transportation by maintaining contact between all wheels and the floor, preventing toppling and loss of traction, even with heavy payloads, and allows for undulation accommodation without full suspension compression.
Implementation Method 1
a suspension arrangement that couples the second set of wheels to the secondary chassis
Implementation Method 2
the suspension springs in the suspension arrangement may be unable to compress any further
Data Source
AI summary
A transport vehicle for transporting payloads is provided. The transport vehicle includes primary and secondary chassis, and first and second sets of wheels for supporting the respective primary and secondary chassis. A guide arrangement is mounted on the primary chassis and the secondary chassis is slidably mounted on the guide arrangement. The primary and secondary chassis are parallel and spaced apart from each other. A payload lifting arrangement is positioned on a top surface of the secondary chassis to lift a payload. When a weight of the payload is below or equal to a threshold weight, the weight is distributed across the second set of wheels by way of the suspension arrangement. When the weight of the payload exceeds the threshold weight, the weight is distributed across the first and second sets of wheels by way of the guide arrangement and the suspension arrangement, respectively.