Removable Truck Scale Platform Alignment Mechanism
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Solution Overview
Problem
Conventional truck scales require realignment and recalibration every time the platform is removed, which is time-consuming and costly, and are prone to performance issues due to exposure to harsh elements and spills.
Innovation Solution
A truck scale with a removable platform and alignment mechanism featuring centering fixtures and projections that guide the platform back to its precise original position, eliminating the need for realignment and recalibration, and ensuring accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the platform is made removable for cleaning and servicing, then ease of maintenance is improved, but realignment and recalibration are required each time, increasing time and cost
Solution Approach 1:
The alignment pins are pre-installed on the platform before removal, and the alignment holes are pre-positioned in the platform structure. This preliminary preparation ensures that when the platform is returned to its position, alignment is automatically achieved without requiring realignment or recalibration operations.
Solution Approach 2:
The alignment mechanism is designed to automatically perform alignment when the platform is placed back on the load cells. The pins fit into the pre-positioned holes, self-aligning the platform without requiring manual intervention or recalibration by the operator.
2Ease of repair
If the platform is removed for cleaning, then ability to service is improved, but calibration accuracy is lost, requiring costly recalibration
Solution Approach 1:
The alignment holes are pre-drilled and positioned with high precision in the platform structure before removal. This preliminary positioning ensures that when the platform is returned, the alignment pins automatically engage with the correct holes, preserving calibration accuracy without requiring recalibration.
Solution Approach 2:
The alignment mechanism automatically maintains measurement precision by self-aligning the platform to the load cells through the pin-hole engagement. This eliminates the need for manual recalibration while allowing the platform to be removed for servicing.
3Reliability
If the scale is designed to be robust for harsh environments, then reliability is improved, but complexity increases
Solution Approach 1:
The scale is divided into separate modular components: the platform, the load cells, and the alignment mechanism. This segmentation allows each component to be optimized independently - the platform can be designed for robustness in harsh environments while the alignment mechanism remains a simple, separate system that ensures precise repositioning.
Solution Approach 2:
The alignment function is extracted as a separate mechanical mechanism (pins and holes) rather than being integrated into the overall scale structure. This extraction allows the alignment feature to be added without significantly increasing the complexity of the main scale structure, while still providing the necessary precision.
Data Source
AI summary
A scale for weighing a vehicle which includes a removable platform supported by a plurality of load cells, the removable platform having a plurality of centering fixtures with each centering fixture having a cavity in its bottom section with a perimeter. The scale further including a plurality of centering projections having an outer surface which the perimeter of the cavity of the plurality of centering fixtures is guided upon lowering the removable platform onto the plurality of load cells.