Offset Box Trencher Design for Boundary-Adjacent Excavation
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Solution Overview
Problem
Existing large-scale trenchers struggle to form trenches and walls without crossing into restricted areas, such as property lines, while maintaining precise alignment and avoiding voids or windows in the constructed structures.
Innovation Solution
An offset box apparatus with a rotating shaft, chain guide member, and trenching mechanism that allows the trencher to form trenches offset from the machine, using a metering system for bulk material and hydraulic controls to adjust the apparatus' angle, ensuring precise trenching near boundaries without crossing them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the trencher operates directly over the trench being formed, then precise alignment and consistent mixing are achieved, but the trencher cannot work near boundaries without crossing into restricted areas
Solution Approach 1:
The patent introduces an offset dimension by positioning the trenching mechanism laterally displaced from the main trencher body through the offset box apparatus. This dimensional shift allows the trencher to form trenches adjacent to boundaries while the main body remains positioned safely away from restricted areas, thereby achieving both boundary proximity capability and precise alignment control.
Solution Approach 2:
The offset box apparatus serves as an intermediary mechanism between the main trencher body and the trenching mechanism. It receives material from the main body and transports it to the offset trenching location, enabling the system to maintain precise control over trench formation while operating near boundaries without direct intrusion into restricted areas.
2Adaptability or versatility
If the trenching mechanism is positioned offset from the main body, then the trencher can work near boundaries, but the complexity of the apparatus increases
Solution Approach 1:
The offset box apparatus is designed to perform multiple functions: it serves as a structural support for the offset trenching mechanism, a conveyor for transporting bulk material from the main body to the offset location, and a positioning mechanism for maintaining precise trench alignment. This multi-functionality reduces the need for separate components, thereby limiting the increase in overall apparatus complexity.
3Productivity
If bulk material is delivered to the offset trenching mechanism, then continuous trenching near boundaries is enabled, but ensuring consistent mixing and avoiding voids becomes more difficult
Solution Approach 1:
The offset box apparatus maintains continuous material flow to the offset trenching mechanism through its conveyor system, ensuring uninterrupted bulk material delivery during trenching operations. This continuous supply enables sustained productivity while the apparatus's designed material distribution characteristics ensure consistent mixing and prevent void formation in the trench backfill.
Data Source
AI summary
An apparatus comprises an offset box housing, a rotating shaft, and an offset chain guide member. The offset box housing includes a top end, a bottom end, a first side, and a second side. The rotating shaft is disposed within the offset box housing, is proximate to the top end of the offset box housing, and includes a first end and a second end, the first end of the rotating shaft is proximate to the first side of the offset box housing. The second end is proximate to the second side of the offset box housing. The rotating shaft including a first sprocket coupled to the rotating shaft. The offset chain guide member guides a chain between the first sprocket and a second sprocket that is coupled to both the offset chain guide member and a trenching mechanism that is disposed offset with respect to a trencher.