Movable Dump Box Surface for Mining Truck Carryback Release
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Solution Overview
Problem
Material sticking to the interior of dump boxes, known as carryback, is a common issue in vehicles like haul trucks, particularly in mining applications, leading to inefficiencies and potential damage from using ejector boxes or excavators, and water scarcity hindering washing solutions.
Innovation Solution
A dump box arrangement with a movable surface part that moves from a first to a second position during tipping, utilizing gravity or actuators to release stuck material, supported by a support part that can be rigid or flexible, allowing efficient carryback prevention without additional mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the dump box is tilted to dump material, then material is discharged from the dump box, but material sticks to the interior surface causing carryback
Solution Approach 1:
The interior surface of the dump box is made dynamic by providing a movable surface part that can change its position relative to the dump box interior. The movable surface part is arranged to move from a first position during loading to a second position during dumping, actively preventing material sticking and carryback through its movement rather than relying on a static surface configuration.
2Loss of substance
If an ejector box is used to release stuck material, then carryback is reduced, but the box size is reduced and load transfer efficiency worsens
Solution Approach 1:
The interior surface of the dump box is segmented into a stationary part and a movable surface part. The movable surface part can be separated from the main box structure and is designed to move independently during the dumping operation. This segmentation allows the movable part to actively scrape and release stuck material without requiring a separate ejector box, thereby maintaining full box capacity while preventing carryback.
3Length of stationary object
If the dump box shape is made complicated to reduce vehicle height, then vehicle height is reduced, but material sticking and carryback are exacerbated
Solution Approach 1:
The movable surface part is specifically designed to navigate and contact complex interior surfaces including casing structures for vehicle wheels. During dumping, the movable surface part moves to actively engage with material in difficult-to-reach areas created by the complicated box shape, preventing material accumulation and carryback in regions that would otherwise be prone to sticking due to the complex geometry.
4Loss of substance
If washing is used to clean the dump box, then carryback is reduced, but water availability is limited at mining sites
Solution Approach 1:
The movable surface part is designed to automatically prevent and release material sticking during the normal dumping operation without requiring external cleaning resources. The system serves itself by using the dumping motion to activate the movable surface part, which then scrapes and releases stuck material, eliminating the need for water washing or other external cleaning interventions.
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 arrangement effectively reduces carryback material, enhancing transport efficiency by allowing stuck material to be released during the dumping process, thus improving load transfer efficiency and minimizing wear on the dump box.
Implementation Method 1
A dump box arrangement with a movable surface part that moves from a first to a second position during tipping, utilizing gravity or actuators to release stuck material
Data Source
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AI summary
A dump box arrangement (50) of a dump box (3) for releasing possible stuck material from the dump box, the dump box comprising an interior surface (31) defined by a configuration of a lower surface (32), opposite sidewalls (33, 34), and a front wall (35). The dump box arrangement comprises a movable surface part (51) arranged on the interior surface of the dump box or forming a portion of the interior surface, and that the movable surface part is arranged movably in interior of the dump box from a first position to a second position at least when the dump box is tipped.