Self-compensating Fork Blade Load Cell Alignment
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Solution Overview
Problem
Existing load-weight sensing systems for lift trucks experience errors due to lateral misalignments of load cells caused by inconsistent stressing of the load-weighing platform and fork blade member, leading to inaccurate weight sensing.
Innovation Solution
The load-weight measuring cells are loosened slightly to allow for initial relative movement, with collars preventing further downward movement and allowing lateral movement, which reduces the unequal stresses and misalignments between the load-weighing platform and fork blade member, thereby maintaining load weighing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the load-weighing platform is supported by load cells at both ends, then the platform can bear the load weight, but lateral misalignments occur causing measurement errors
Solution Approach 1:
The invention introduces a dynamic adjustment mechanism that allows the load cells to self-align laterally in response to differential deformations between the platform and fork blade. The adjustable mounting positions enable the system to adapt to varying load conditions, maintaining measurement accuracy while preserving load-bearing strength.
Solution Approach 2:
The invention changes the mounting parameters of the load cells, specifically allowing adjustment of their lateral positions relative to the platform and fork blade. This parameter adjustment compensates for misalignments caused by differential elastic deformations, thereby eliminating measurement errors while maintaining structural integrity.
2Stability of the object's composition
If the platform and fork blade deform differently under load, then the load cells experience unequal stresses, but this causes misalignments and measurement errors
Solution Approach 1:
The adjustable mounting mechanism allows the load cells to dynamically adapt to the differential deformation patterns of the platform and fork blade. By adjusting the mounting positions, the system maintains proper alignment despite unequal stresses, preventing measurement errors while preserving the natural structural deformation response.
Solution Approach 2:
The invention modifies the mounting parameters of the load cells to account for differential deformations. By adjusting the lateral and vertical positions of the load cells relative to the platform and fork blade, the system compensates for unequal stress distributions, ensuring accurate weight sensing throughout the loading range.
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
This solution minimizes errors in load weight sensing by reducing the impact of unequal deformations and stresses, enhancing the accuracy and operational efficiency of the load-weight sensing system.
Implementation Method 1
the weight of the load elastically deforms the overlying load weighing platform and the underlying fork blade member downwardly
Data Source
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AI summary
A load-weighing assembly has a substantially laterally-extending beam-type load-weighing platform and a substantially laterally-extending cantilever-type fork blade member located beneath the platform, interconnected by a load weight- measuring cell. The weight measuring cell is laterally movable with respect to at least one of the platform and blade member during an initial part of a load weighing process so as to minimize transmission of lateral force between the platform and the weight-measuring cell, thereby compensating for load-weighing errors which would otherwise occur.