Axle Force Measurement in Industrial Truck Lifting Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing industrial trucks face challenges in accurately measuring load weight due to transverse forces from uneven ground surfaces, which falsify measurements, and existing solutions are structurally complex or require additional components and space.
Innovation Solution
Designing the axle as a force-measuring element that also functions as a bearing component, with multiple force-measuring elements on the same lifting component, allowing for compact and efficient weight measurement without additional installation space, using a threaded spindle with a spindle nut or hydraulic cylinder for drive, and incorporating strain gauges or capacitive/inductive sensors for precise measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force transducers are integrated into chassis components (pendulum suspension, rear axle), then weight measurement is enabled, but transverse forces from uneven ground falsify the measurements
Solution Approach 1:
The force measurement function is extracted from the chassis components and transferred exclusively to the lifting device's axle. This separation isolates the measurement from transverse forces generated by chassis movement on uneven ground, ensuring accurate weight measurement regardless of ground conditions.
Solution Approach 2:
The axle of the lifting device serves as an intermediary element that directly contacts the load through the lifting components. By positioning the force sensor in this intermediary location rather than in the chassis, the measurement pathway is isolated from harmful transverse forces while still capturing the vertical load information.
2Measurement precision
If additional force-measuring components are added to existing lifting devices, then weighing function is achieved, but structural complexity and installation space requirements increase
Solution Approach 1:
The force measurement function is merged with the existing axle component of the lifting device. Instead of adding separate force-measuring components, the axle itself is designed to serve both as a structural bearing component and as the force-measuring element, thereby eliminating additional structural complexity.
Solution Approach 2:
The axle is given multiple functions: it serves as both a structural bearing component supporting the lifting device and as a force-measuring element for weight detection. This multi-functionality eliminates the need for separate dedicated force-measuring components, reducing overall device complexity.
3Measurement precision
If multiple force-measuring elements are distributed across different lifting components, then comprehensive load measurement is achieved, but the number of components and installation complexity increase
Solution Approach 1:
Multiple force measurement points are merged into a single integrated axle component. The axle incorporates all necessary force-measuring elements in one location, eliminating the need for distributed sensors across multiple lifting components while still achieving comprehensive load measurement.
Solution Approach 2:
The axle serves as a universal force-measuring platform that can detect all vertical forces acting on the lifting device through a single component. This multi-functional design replaces multiple distributed force-measuring elements with one consolidated sensor system.
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
Enables accurate and independent weight measurement of the load, regardless of load distribution, with a simple and robust structure that minimizes additional components and space requirements, allowing for precise force or weight measurement using existing lifting devices.
Implementation Method 1
the axis is designed as a bending force transducer. It can be provided here, for example, that the axis has a measuring section, for example with a transverse bore or a transverse recess, in the area of which one—preferably several—strain gauges are fastened
Implementation Method 2
Alternatively or additionally, it can also be provided that the axis is designed as a capacitively measuring and/or inductively measuring force transducer
Implementation Method 3
Alternatively or additionally, it can also be provided that the axis is designed as a capacitively measuring and/or inductively measuring force transducer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
On a lifting device, which in particular can be designed as a lifting device for an industrial truck and comprises at least two lifting components pivotally connected to each other by means of an axle, it is provided that the axle, in addition to the function thereof as a bearing component, is designed as a force measuring element.