Collapsible Dump Hopper Tail Using Composite Impact Deformation
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Solution Overview
Problem
Conventional dump trucks lack effective protection for the operator's cab in rear-end collisions, as the rigid Dump body tail can cause severe damage and injury due to its inability to dissipate energy upon impact, and existing bumper extensions are heavy, reduce load capacity, and do not always function as intended energy dissipators.
Innovation Solution
A collapsible Dump body design featuring a plastically deformable tail and side segments made from composite materials like carbon fiber, fiberglass, and ceramic rubbers, which absorb impact energy without relying on electronic or hydraulic systems, ensuring controlled deformation and maintaining operational capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid steel bumper extension is installed to protect the operator's cab in rear-end collisions, then the protective function is improved, but the weight of the vehicle increases significantly (up to 3 tons), reducing load capacity and increasing fuel consumption
Solution Approach 1:
The patent changes the material parameter from traditional steel to composite materials, fundamentally altering the weight-to-protection ratio. The composite structure provides equivalent protective function while dramatically reducing the weight penalty associated with traditional steel bumper extensions.
Solution Approach 2:
The patent employs composite materials for the bumper extension, combining multiple materials to achieve both the necessary protective strength and reduced weight. This allows the structure to maintain integrity and protective function while being significantly lighter than conventional steel alternatives.
2Strength
If a rigid steel bumper extension is used as a distance barrier, then the structural integrity is maintained, but the energy dissipation function is compromised as it cannot deform plastically to absorb impact energy
Solution Approach 1:
The patent introduces dynamic characteristics to the bumper extension through composite material properties that allow controlled deformation during impact. The structure transitions from a purely rigid state to a dynamically responsive system that can absorb energy through deformation while maintaining overall structural integrity.
Solution Approach 2:
The patent modifies the mechanical parameters of the bumper extension by using composite materials with different stress-strain characteristics than steel. These material parameter changes enable the structure to exhibit both strength and energy-absorbing deformation capabilities simultaneously.
3Strength
If the Dump body tail is made structurally rigid to maintain operational stability, then the structural strength is improved, but the energy dissipation capability in case of impact is reduced, creating safety risks for the operator
Solution Approach 1:
The patent applies local quality by differentiating the mechanical properties of different parts of the Dump body. The composite material application is localized to the bumper extension and tail sections that require energy absorption, while maintaining structural strength in other critical areas, creating a differentiated structural response to impact.
Solution Approach 2:
The patent converts the harmful rigid impact characteristic of the Dump body tail into a beneficial energy-absorbing deformation mechanism. The composite materials enable the structure to deform in a controlled manner during impact, transforming the previously harmful rigid collision into a protective energy-dissipating event.
4Reliability
If conventional FOPS and ROPS standards are applied to the operator's cab, then protection against rollovers and falling objects is improved, but protection against rear-end collision impacts from the Dump body tail remains insufficient
Solution Approach 1:
The patent enhances the universality of operator protection by extending protective functionality beyond the standard FOPS and ROPS requirements. The composite bumper extension provides multi-functional protection, addressing rear-end collision risks that are not covered by conventional standards while maintaining compatibility with existing safety systems.
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 collapsible design effectively reduces the risk of severe injury to the operator by absorbing impact energy, maintains load capacity, ensures operational continuity, and allows for easy maintenance and universal application across various Dump body models.
Implementation Method 1
the floor and side segments are made from composite materials, such as carbon fiber, fiberglass and ceramic rubbers, with low and high strength steels, which contract when subjected to longitudinal stresses in the Dump body of such a magnitude that they exceed the yield stress of the segment
Data Source
AI summary
A Dump body for cargo vehicles, comprising: a non-uniform tail extension portion coupled to the rear of the Dump body tail; wherein the tail portion collapses by plastic deformation due to its structural configuration, being partially or entirely made of composite materials.