Dump Body Ejector Assembly With Low-Angle Unloading
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Solution Overview
Problem
Existing dump truck designs face stability and operational safety issues due to high center of gravity when pivoting the dump body, and require high mechanical strength for unloading, which increases weight and cost.
Innovation Solution
A dumping-body assembly with a pivotable dump body, an ejecting unit, and a pivoting unit that limits the pivot angle to 40° or less, using a sensor and control system to manage the pivoting and unloading process, reducing the need for high actuating forces and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the dump body is pivoted upwardly by at least 60° to position from horizontal stowage position into inclined unloading position, then proper unloading of the payload is ensured, but the centre of gravity of the vehicle is substantially raised, affecting stability and operational safety
Solution Approach 1:
The patent changes the pivot angle parameter from the conventional 60° or more to a reduced angle of not more than 40°. This parameter change allows the ejector to effectively unload the payload at the reduced angle, maintaining productivity while improving vehicle stability by keeping the center of gravity lower.
Solution Approach 2:
The patent replaces the purely gravity-based unloading mechanism with a hybrid system that uses an ejector (mechanical pushing device) assisted by gravity. This substitution allows unloading to occur at reduced pivot angles, as the ejector provides the necessary force to move material out even when the gravitational component is reduced.
2Adaptability or versatility
If the payload container is maintained in a horizontal position when being unloaded, then the vehicle can operate in applications having limited overhead clearance, but the ejector needs to be actuated with high actuating forces, requiring high mechanical strength
Solution Approach 1:
The patent changes the pivot angle parameter to be between 0° and 40° (inclusive), optimizing it to provide sufficient gravitational force assistance to the ejector. This reduces the actuating forces required compared to horizontal positioning, thereby reducing the mechanical strength requirements of the ejector while still accommodating limited overhead clearance conditions.
Solution Approach 2:
The patent positions the dump body at an intermediate angle (0°-40°) that creates an optimal balance between gravitational assistance and overhead clearance accommodation. This intermediate positioning creates equipotential conditions where gravity provides sufficient component force to assist the ejector without requiring the container to be fully horizontal or fully elevated.
3Productivity
If the dump body is pivoted upwardly to at least 60° for proper unloading, then payload unloading is effective, but the weight of the vehicle arrangement increases when combining with ejector arrangement
Solution Approach 1:
The patent reduces the pivot angle parameter to not more than 40°, which reduces the gravitational force component available for unloading. However, this is compensated by the ejector system, allowing effective unloading at the reduced angle. The overall weight is optimized by selecting an angle that minimizes the structural strength requirements of the ejector while maintaining unloading effectiveness.
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 solution provides a weight-optimized design with improved operational safety by reducing the pivot angle and utilizing gravity for unloading, lowering mechanical strength requirements for the ejector and reducing wear, while maintaining effective payload unloading.
Implementation Method 1
a sensor unit configured to determine pivot state information being indicative of a pivot angle between an actual position of the dump body relative to its stowage end position or its unloading end position
Implementation Method 2
the payload received in the dump body slides out due to gravity
Data Source
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AI summary
A dumping-body for use a haulage vehicle. The dumping body is pivotably mounted to a carrier on the vehicle. An ejecting unit moves an ejector in the dump body to unload a payload. A pivoting unit on the vehicle pivots the dump body (14) relative to the carrier between a stowage end position and an unloading end position. The pivoting unit pivots the dump body relative to the carrier by a maximum pivot angle of not more than 40° to positioning the dump body from a stowage end position into an unloading end position.